Method for driving a liquid crystal display device

Abstract

To provide an illumination device which can precisely control brightness for each area.SOLUTION: An illumination device includes a threshold, a plurality of light sources, a spacer and a diffuser panel. The plurality of light sources and the spacer are surrounded with the threshold. The height of the threshold is made higher than that of the plurality of light sources, and an interval between the threshold and the diffuser panel is made shorter than the height of the threshold. An interval between the threshold and the diffuser panel is made longer than the height of the light source. Thus, it is possible to prevent light leakage from the light source to the outside of the threshold, and precisely control brightness for each area.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a display device, a liquid crystal display device, a semiconductor device, a method for producing them, or a method for manufacturing the same. In particular, the present invention relates to a method for driving a display device, a liquid crystal display device, a semiconductor device, etc. The present invention relates to a method of operating a digital camera or a method of processing signals therein. [Background technology]

[0002] In recent years, flat panel displays, such as liquid crystal displays, have become widely used. And the various performance features of flat panels are improving more and more. One of the panel specifications is the resolution (or number of pixels), and resolution has also improved significantly. .

[0003] Therefore, super-resolution processing technology, which is a technology for converting low-resolution images into high-resolution images, is being developed. Techniques for this purpose have been investigated (Patent Documents 1 to 3). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-160565 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-085411 [Patent Document 3] Japanese Patent Application Laid-Open No. 2008-252701 Summary of the Invention [Problem to be solved by the invention]

[0005] On the other hand, various techniques for improving the image quality of liquid crystal displays are being investigated. Therefore, in flat panel displays such as LCD displays, When processing to improve image quality, various problems can occur. The image quality may decrease, the image may not be displayed correctly, or the power consumption may increase. This resulted in noise and required extra components. This increases the cost, the size of the device, and the frame of the display device. The image may become too large, the processing may become slow, the display may become slow, There is a possibility that the frame frequency will be low.

[0006] Based on the above, a device with improved image quality, a driving method thereof, or a manufacturing method thereof is provided. The problem is that the device for displaying a correct image, the driving method thereof, or the manufacturing method thereof Alternatively, a device with low power consumption and a driving method thereof may be provided. The object is to provide a method for manufacturing the device. The object is to provide a device with few parts, or a method for manufacturing the same. The objective of the present invention is to provide a low-cost device, a low-cost method for manufacturing the same, and The object is to provide a driving method or a manufacturing method thereof. The object is to provide a device, a driving method thereof, or a manufacturing method thereof. The objective is to provide a small device, a driving method thereof, or a manufacturing method thereof. The object is to provide a device with high processing speed, a driving method thereof, or a manufacturing method thereof. The object of the present invention is to provide a device with high speed display, a driving method thereof, or a manufacturing method thereof. Alternatively, a device with a high frame frequency, a driving method thereof, or a manufacturing method thereof is provided. The challenge is to [Means for solving the problem]

[0007] Using super-resolution processing technology, the low-resolution image is converted into a high-resolution image. Image processing such as enhancement, interpolation of frame data to display at a higher frame frequency, Local brightness control using backlight (LOCAL DIMMING) G), data processing for overdrive operation, etc.

[0008] Alternatively, a low-resolution image can be converted into a high-resolution image using super-resolution processing technology. Then, image processing such as edge enhancement and frame data for displaying at a higher frame frequency are performed. Then, local brightness control using the backlight (local dimming: L Data processing for CAL DIMMING, data for overdrive operation Processing, etc.

[0009] Therefore, the first step performs super-resolution processing and the second step performs local dimming processing. and a step of: A method for driving a liquid crystal display device is provided.

[0010] Alternatively, the first step performs super-resolution processing and the second step performs local dimming processing. and a third step of performing overdrive processing, Later, the second step is performed, and after the second step, the third step is performed. The present invention provides a method for driving a liquid crystal display device, characterized in that the method is carried out.

[0011] Or, the first step is to perform super-resolution processing and the second step is to perform frame interpolation processing. The third step performs local dimming processing, and the fourth step performs overdrive processing. and the second step is carried out after the first step, and After the second step, the third step is carried out, and after the third step, There is provided a method for driving a liquid crystal display device, characterized in that the following four steps are carried out:

[0012] Alternatively, a first step of performing super-resolution processing and a second step of performing edge enhancement processing, The third step performs local dimming processing, and the fourth step performs overdrive processing. and a step, wherein the second step is carried out after the first step, and the second step After the step, the third step is performed, and after the third step, the fourth step is performed. A method for driving a liquid crystal display device is provided, characterized in that the steps are carried out.

[0013] The switch can be of various types. For example, an electrical switch There are various types of switches, such as switches and mechanical switches. In other words, anything that can control the flow of current is sufficient. For example, a transistor (e.g., a bipolar transistor) can be used as a switch. transistors, MOS transistors, etc.), diodes (e.g., PN diodes, PIN diodes, Schottky diodes, MIM (Metal Insulator Metal diode, MIS (Metal Insulator Semiconductor) conductor diode, diode-connected transistor, etc. Alternatively, a logic circuit that combines these can be used as a switch.

[0014] An example of a mechanical switch is a digital micromirror device (DMD). There are switches that use MEMS (microelectromechanical systems) technology. The switch has an electrode that can be moved mechanically, and the movement of the electrode Thus, the device operates by controlling conduction and non-conduction.

[0015] When a transistor is used as a switch, the transistor acts as a simple switch. However, the polarity (conductivity type) of the transistor is not particularly limited. To suppress this, it is desirable to use a transistor with a polarity that has a smaller off-state current. Transistors with low leakage current include transistors with LDD regions and multi-gate There are transistors with a structure, or transistors that operate as switches. The source terminal operates at a potential close to the low-potential power supply (Vss, GND, 0V, etc.) On the other hand, if the voltage of the source terminal is If the potential is close to the high-potential power supply (such as Vdd), a P-channel transistor is used. It is preferable to use an N-channel transistor because the source terminal is When operating at a potential close to the low-potential power supply, the source terminal of a P-channel transistor When the power supply operates at a potential close to that of the high-potential power supply, the absolute value of the voltage between the gate and source is increased. This is because the switch can operate more accurately because it can detect the force of the current. In addition, the transistor rarely operates as a source follower, so the output voltage is small. This is because the size is less likely to become small.

[0016] In addition, both N-channel and P-channel transistors are used to An S-type switch can be used as the switch. If a CMOS-type switch is used, the P channel Either an N-channel transistor or an N-channel transistor is used. When the wire is passed through, current flows, making it easier to function as a switch. Whether the voltage of the input signal is high or low, the voltage can be output appropriately. Furthermore, the voltage amplitude of the signal used to turn the switch on or off can be reduced. Therefore, power consumption can also be reduced.

[0017] When a transistor is used as a switch, the switch is connected to the input terminal (source terminal or drain terminal), and an output terminal (the other of the source terminal or drain terminal), It has a terminal (gate terminal) that controls conduction. On the other hand, it has a diode as a switch. When using a switch, the switch may not have a terminal for controlling conduction. Using diodes as switches rather than transistors reduces the wiring required to control the terminals. It can be reduced.

[0018] When it is explicitly stated that A and B are connected, it means that A and B are electrically connected. A and B are connected functionally, A and B are directly connected, Here, A and B are objects (e.g., devices, elements, circuits) Therefore, the predetermined connection relationship For example, the present invention is not limited to the connection relationships shown in the drawings or text, but may be applied to the connections shown in the drawings or text. This also includes things other than relationships.

[0019] For example, if A and B are electrically connected, the electrical connection between A and B can be The elements that function as One or more diodes (e.g., diodes) may be connected between A and B. Alternatively, When A and B are functionally connected, a circuit (e.g. For example, logic circuits (inverters, NAND circuits, NOR circuits, etc.), signal conversion circuits (DA conversion circuits, AD conversion circuits, gamma correction circuits, etc.), potential level conversion circuits (power supply circuits (boosting circuits , step-down circuits, level shifter circuits that change the potential level of signals, voltage sources, current sources , switching circuits, amplifier circuits (circuits that can increase signal amplitude or current, etc.), operational amplifiers , differential amplifier circuits, source follower circuits, buffer circuits, etc.), signal generation circuits, memory circuits, One or more control circuits may be connected between A and B. For example, Even if there is another circuit between them, if the signal output from A is transmitted to B, then A and B are are considered to be functionally connected.

[0020] When it is explicitly stated that A and B are electrically connected, it means that A and B are electrically connected. When A and B are electrically connected (i.e., when another element or circuit is placed between A and B), A and B are functionally connected (i.e., there is no other connection between A and B) and B are functionally connected (i.e., there is no other connection between A and B). When A and B are connected functionally through a circuit) and when A and B are connected directly ( In other words, A and B are connected without any other element or circuit between them. In other words, when explicitly stating that something is electrically connected, it simply means that it is connected. is the same as if it were expressly stated only that it is

[0021] Note that a display element, a display device which is a device having a display element, a light-emitting element, a device having a light-emitting element The light emitting device can have various forms and various elements. For example, the display element, display device, light-emitting element or light-emitting device may be an EL (electroluminescent EL elements (EL elements containing organic and inorganic materials, organic EL elements, inorganic EL elements), LE D (white LED, red LED, green LED, blue LED, etc.), transistor (responding to current transistors that emit light when exposed to light, electron-emitting devices, liquid crystal devices, electronic ink, electrophoretic devices, graphene Rating light bulb (GLV), plasma display panel (PDP), digital DMD (Digital Micromirror Device), Piezoelectric Ceramic Display, Carbon Nanotube The contrast, brightness, reflectance, transmittance, etc. change due to electromagnetic effects, such as The display device using the EL element may have a display medium. As a display device using electron-emitting elements, a field emission display ( FED) and SED flat panel displays (SED: Surface-conductive Displays using liquid crystal elements, such as LCDs (Electron-emitter Displays) The device is a liquid crystal display (transmissive liquid crystal display, semi-transmissive liquid crystal display, Reflective LCD displays, direct-view LCD displays, projection LCD displays), electronic An example of a display device using ink or electrophoretic elements is electronic paper.

[0022] The EL element has an anode, a cathode, and an EL layer sandwiched between the anode and the cathode. The EL layer is made up of a material that utilizes light emission (fluorescence) from singlet excitons, Some utilize light emission from triplet excitons (phosphorescence), while others utilize light emission from singlet excitons (fluorescence). Some utilize light emission from triplet excitons (phosphorescence), while others utilize organic materials. formed by inorganic matter, formed by organic matter, Materials formed by inorganic substances, including polymeric materials, low molecular weight materials, polymeric materials However, the present invention is not limited to the above. There can be various types of EL elements.

[0023] The electron-emitting device is an element that extracts electrons by concentrating a high electric field on the cathode. As electron emitters, Spindt type, carbon nanotube (CNT) type, metal-insulator - MIM (Metal-Insulator-Metal) type with metal laminated, metal-insulator MIS (Metal-Insulator-Semiconductor) ctor type, MOS type, silicon type, thin film diode type, diamond type, metal-insulated Thin film type such as semiconductor-metal type, HEED type, EL type, porous silicon type, surface conduction ( However, the electron emission element is not limited to this, and may be of any type. It can have a variety of things.

[0024] The liquid crystal element is a device that controls the transmission or non-transmission of light by the optical modulation action of liquid crystal. It is an element that consists of a pair of electrodes and liquid crystal. The optical modulation action of the liquid crystal is as follows: Controlled by the electric field applied to the liquid crystal (including the horizontal electric field, vertical electric field, or diagonal electric field) The liquid crystal element is controlled by nematic liquid crystal, cholesteric liquid crystal, smectic liquid crystal, Discotic liquid crystal, thermotropic liquid crystal, lyotropic liquid crystal, low molecular weight liquid crystal , polymer liquid crystal, polymer dispersed liquid crystal (PDLC), ferroelectric liquid crystal, antiferroelectric liquid crystal, main chain liquid crystal Examples include side-chain polymer liquid crystals, plasma-addressed liquid crystals (PALCs), and banana-shaped liquid crystals. The liquid crystal driving method is Twisted Nematic (TN). mode, STN (Super Twisted Nematic) mode, IPS (In -Plane-Switching) mode, FFS (Fringe Field Switching) itching mode, MVA (Multi-domain Vertical Alignment) Alignment) mode, PVA (Patterned Vertical Alignment) mode ment) mode, ASV (Advanced Super View) mode, ASM (Axially Symmetric aligned Micro-cell) mode OCB(Optically Compensated Birefringenc) e) mode, ECB (Electrically Controlled Birefringence Ingence) mode, FLC (Ferroelectric Liquid Crystal stal) mode, AFLC(AntiFerroelectric Liquid C Crystal mode, PDLC (Polymer Dispersed Liquid Crystal) Crystal mode, guest host mode, Blue Phase mode However, the present invention is not limited to this, and any liquid crystal element and its driving method can be used. A variety of materials can be used as the

[0025] In addition, electronic paper is displayed by molecules (optical anisotropy, dye molecule orientation etc.), those displayed by particles (electrophoresis, particle migration, particle rotation, phase change, etc.), Some are displayed by the movement of one edge of the film, while others are displayed by the coloring / phase change of molecules. Some are displayed by molecular light absorption, and others are displayed by spontaneous light emission caused by electron-hole combinations. For example, a microcapsule display is used as an electronic paper display method. ball electrophoresis, horizontal electrophoresis, vertical electrophoresis, spherical twist ball, magnetic twist ball, cylindrical twist ball method, charged toner, electronic liquid powder, magnetic migration type, magnetic sensing Thermal, electrowetting, light scattering (transparent / opaque), cholesteric liquid crystal / light Conductive layer, cholesteric liquid crystal, bistable nematic liquid crystal, ferroelectric liquid crystal, dichroic dye / liquid Crystal dispersion type, movable film, color development and fading by leuco dye, photochromic, electrochromic Mixing, electrodeposition, flexible organic EL, etc. can be used. However, it is not limited to this, and various electronic paper and display methods can be used. Here, by using microcapsule electrophoresis, the electrophoretic method This can solve the drawbacks of aggregation and precipitation of electrophoretic particles. It has advantages such as high reflectivity, wide viewing angle, low power consumption, and memory properties.

[0026] The plasma display panel is made up of a substrate on which electrodes are formed, and a A substrate having grooves formed on its surface and a phosphor layer formed in the grooves is placed opposite to the substrate at a narrow distance, and a rare gas is introduced into the substrate. Alternatively, the plasma display panel has a structure in which a plasma tube is enclosed. It is also possible to sandwich the plasma tube between film electrodes from above and below. A tube is a glass tube that contains discharge gas, RGB phosphors, etc. By applying a voltage between the electrodes, ultraviolet light is generated, causing the phosphor to glow. The display can be performed by using the DC type plasma display panel. The plasma display panel may be a DP or AC type PDP. , AWS (Address While Sustain) drive, subframe reset ADS (Address Display System) is divided into a ping period, an address period, and a sustain period. Separated drive, CLEAR (HI-CONTRAST & LOW ENERGY Y ADDRESS&REDUCTION OF FALSE CONTOUR SEQ UENCE) drive, ALIS (Alternate Lighting of Surf aces) method, TERES (Technology of Reciprocal S However, it is not limited to this, and plasma A variety of displays can be used.

[0027] In addition, display devices that require a light source, such as liquid crystal displays (transmissive liquid crystal displays), Transflective LCD displays, reflective LCD displays, direct-view LCD displays, projection LCD displays projection type liquid crystal display, display device using grating light valve (GLV), As a light source for a display device using a digital micromirror device (DMD), Uses thermoluminescence, cold cathode tube, hot cathode tube, LED, laser light source, mercury lamp, etc. However, the light source is not limited to this, and various light sources can be used. Cut.

[0028] Note that various types of transistors can be used. There is no limitation on the type of transistor used. For example, amorphous silicon, polycrystalline silicon, Microcrystalline (also called microcrystalline, nanocrystalline, or semi-amorphous) silicon The use of thin film transistors (TFTs) with non-single crystal semiconductor films, such as There are various advantages to using TFTs. For example, in the case of single crystal silicon, Since it can be manufactured at a lower temperature than conventional methods, it is possible to reduce manufacturing costs or increase the size of manufacturing equipment. Since the manufacturing equipment can be made larger, it is possible to manufacture on large substrates. Since a large number of display devices can be manufactured, they can be manufactured at low cost. Therefore, a substrate with low heat resistance can be used. A display element can be manufactured using a transistor on a light-transmitting substrate. It is possible to control the light transmission through the transistor. A part of the film that makes up the transistor can transmit light, which improves the aperture ratio. It can be done.

[0029] In addition, when producing polycrystalline silicon, by using a catalyst (such as nickel), It is possible to further improve the crystallinity and manufacture transistors with good electrical characteristics. As a result, the gate driver circuit (scanning line driver circuit) and the source driver circuit (signal line driver circuit) ), signal processing circuits (signal generation circuit, gamma correction circuit, DA conversion circuit, etc.) are integrated on the board It can be formed.

[0030] In addition, when manufacturing microcrystalline silicon, by using a catalyst (nickel, etc.), It is possible to further improve the crystallinity and manufacture transistors with good electrical characteristics. In this case, the crystallinity can be improved by simply applying heat treatment without laser irradiation. As a result, part of the source driver circuit (analog switch, etc.) and the gate The gate driver circuit (scanning line driving circuit) can be formed integrally on the substrate. If laser irradiation is not performed for crystallization, unevenness in the crystallinity of silicon can be suppressed. Therefore, it is possible to display images with improved quality.

[0031] However, polycrystalline silicon and microcrystalline silicon can be produced without using a catalyst (such as nickel). It is possible to do so.

[0032] In addition, improving the crystallinity of silicon to polycrystalline or microcrystalline can improve the overall panel performance. It is desirable to do this on the whole body, but it is not limited to this. The crystallinity of the silicon may be improved. For example, the peripheral circuit area, which is an area other than the pixel area, can be selectively irradiated. Alternatively, the gate driver circuit, the source driver circuit, and the Alternatively, the laser light may be irradiated only on the area of ​​the source driver circuit. Alternatively, the laser light may be irradiated only on the area of ​​the semiconductor device (for example, an analog switch). Therefore, it is possible to improve the crystallization of silicon only in areas where high-speed circuit operation is required. Since there is little need for high-speed operation in the pixel area, the crystallinity can be improved without any need for improvement. The pixel circuit can be operated without any problems. This allows the manufacturing process to be shortened, improving throughput and reducing manufacturing costs. The number of manufacturing devices required is small, which reduces manufacturing costs. It is possible to do this.

[0033] Alternatively, a transistor can be formed using a semiconductor substrate, an SOI substrate, or the like. These features result in a product with little variation in characteristics, size, shape, etc., a high current supply capacity, and a These transistors allow the fabrication of low-noise transistors. This allows for lower power consumption and higher circuit integration.

[0034] Or ZnO, a-InGaZnO, SiGe, GaAs, indium zinc oxide ( Compound semiconductors or oxide semiconductors such as IZO, indium tin oxide (ITO), and SnO and transistors with thin films of these compound semiconductors or oxide semiconductors. This allows the manufacturing temperature to be lowered, For example, it is possible to manufacture transistors at room temperature. For example, a transistor can be formed directly on a plastic substrate or a film substrate. These compound semiconductors or oxide semiconductors are used in the channel portion of a transistor. For example, these compound semiconductors can be used for other purposes. Alternatively, an oxide semiconductor can be used as a resistor element, a pixel electrode, or a light-transmitting electrode. Furthermore, they can be deposited or formed simultaneously with the transistors, reducing costs. .

[0035] Alternatively, a transistor formed by inkjet or printing can be used. These allow fabrication at room temperature, in low vacuum, or on large substrates. Since it is possible to manufacture without using a mask (reticle), The layout can be easily changed. Furthermore, since there is no need to use a resist, This reduces material costs and the number of processes. Furthermore, since the film is applied only to the necessary parts, This method is less wasteful and less costly than the method of etching after forming a film on the entire surface. can be done.

[0036] Alternatively, transistors having organic semiconductors or carbon nanotubes can be used. This allows transistors to be formed on a flexible substrate. A semiconductor device using such a substrate can be made resistant to shocks.

[0037] Furthermore, transistors of various structures can be used. For example, MOS transistors The transistors used may be junction transistors, bipolar transistors, etc. By using MOS transistors, the size of the transistors can be reduced. Therefore, a large number of transistors can be mounted. By using a transistor, a large current can be passed through. It can be made to work.

[0038] In addition, MOS transistors, bipolar transistors, etc. can be mixed on one substrate. This can achieve low power consumption, miniaturization, high-speed operation, etc. do.

[0039] In addition, various other transistors can be used.

[0040] Note that a transistor can be formed using various substrates. The substrate is not limited to a specific one. Examples of the substrate include a single crystal substrate and an SOI substrate. , glass substrate, quartz substrate, plastic substrate, stainless steel substrate, stainless steel A substrate with a foil or the like can be used. Then, the transistor is transferred to another substrate. The substrate on which the transistor is transferred may be a single crystal substrate, an SOI substrate, Glass substrate, quartz substrate, plastic substrate, paper substrate, cellophane substrate, stone substrate, wood substrate Board, fabric substrate (natural fibers (silk, cotton, linen), synthetic fibers (nylon, polyurethane, polyester) containing recycled fibers (acetate, cupra, rayon, recycled polyester) (including leather substrate, rubber substrate, stainless steel substrate, stainless steel foil) Alternatively, the skin (epidermis, dermis) of an animal such as a human or the like may be used. The subcutaneous tissue may be used as a substrate. Alternatively, a substrate may be used to form a transistor, The substrate may be polished to make it thinner. The substrate to be polished may be a single crystal substrate, an SOI substrate, or the like. , glass substrate, quartz substrate, plastic substrate, stainless steel substrate, stainless steel Substrates with foil or other materials can be used. , forming transistors with good characteristics, forming transistors with low power consumption, and devices that are durable The device can be manufactured with ease, heat resistance can be imparted, and the device can be made lighter or thinner.

[0041] The structure of the transistor can take various forms and is not limited to a specific structure. For example, a multi-gate structure with two or more gate electrodes can be applied. When the gate structure is used, the channel regions are connected in series, so multiple transistors are connected in series. The multi-gate structure reduces the off-state current and improves the transistor's durability. Alternatively, the multi-gate structure can be used to improve saturation voltage (improve reliability). When operating in the MOSFET region, the drain-source current remains constant even if the drain-source voltage changes. The voltage-current characteristic does not change much, and the slope of the voltage-current characteristic can be made flat. By taking advantage of the flat slope of As a result, it is possible to realize an active load with good characteristics, such as a differential circuit or a current mirror. The circuit can be realized.

[0042] As another example, a structure in which gate electrodes are arranged above and below the channel can be applied. By using a structure in which gate electrodes are arranged above and below the channel, The current value can be increased by applying a gate voltage above and below the channel. By using a structure in which the poles are arranged, it becomes easier for a depletion layer to form, so the S value needs to be improved. In addition, by arranging gate electrodes above and below the channel, This results in a configuration in which multiple transistors are connected in parallel.

[0043] A structure in which a gate electrode is disposed above a channel region, and a structure in which a gate electrode is disposed below a channel region The structure in which the channel region is divided into multiple regions is also available. a structure in which the channel regions are connected in parallel, or a structure in which the channel regions are connected in series Furthermore, the channel region (or a part thereof) can be provided with a source electrode or a drain electrode. A structure in which the source electrode and drain electrode are overlapped can also be applied. By using a structure in which the drain electrodes overlap, charges accumulate in part of the channel region. This can prevent the operation from becoming unstable. By providing an LDD region, it is possible to reduce the off-current or increase the breakdown voltage of the transistor. Alternatively, by providing an LDD region, When operating in the saturation region, the drain-source voltage remains constant even if the drain-source voltage changes. The current does not change much, and the slope of the voltage-current characteristics can be made flat.

[0044] Note that various types of transistors can be used and can be formed using various substrates. Therefore, all the circuits required to realize a given function can be simultaneously For example, it is possible to form the circuit necessary to realize a predetermined function on a single substrate. All of the circuits are made on various substrates such as glass, plastic, single crystal, or SOI. It is also possible to form the circuit using a substrate that is necessary to realize a predetermined function. All components are formed using the same substrate, reducing the number of components and reducing costs. Alternatively, the reliability can be improved by reducing the number of connection points with the circuit components. A part of the circuit required to realize a specific function is formed on a certain substrate, and the specific function is Other parts of the circuitry required for realization may be formed on other substrates. In other words, all of the circuits required to realize a given function are formed using the same substrate. For example, some of the circuits required to realize a specific function may be The transistors on the substrate form another circuit necessary to realize a specific function. Some are formed on single crystal substrates and consist of transistors formed using single crystal substrates. The IC chip is then connected to the glass substrate using COG (Chip On Glass). The IC chip can be placed on the substrate. B (Tape Automated Bonding) or printed circuit boards are used to bond glass substrates. In this way, part of the circuit is formed on the same substrate. This reduces costs by reducing the number of components, and reduces the number of connections to circuit components. It is possible to improve reliability. Alternatively, it is possible to improve reliability by reducing the number of parts with high drive voltages and high drive frequencies. The power consumption of the circuitry in the part is large, so the circuitry in such part should be on the same board. Instead, for example, a circuit for that part is formed on a single crystal substrate, and By using an IC chip configured in this way, it is possible to prevent an increase in power consumption.

[0045] A pixel is the smallest unit of an image. Therefore, it is divided into R (red), G (green), and B (blue). In the case of a full-color display device consisting of color elements of R and G, one pixel is a dot of the color element R. The color elements are composed of dots of the color elements A and B. The colors are not limited to three, and more than three colors may be used, or colors other than RGB may be used. For example, Alternatively, you can add white to make it RGBW (W is white). You may add one or more colors such as blue, cyan, magenta, emerald green, or vermilion. For example, a color similar to at least one color in RGB may be added to RGB. For example, R, G, B1, B2 may be used. B1 and B2 are both blue, but slightly different. The wavelengths are different. Similarly, R1, R2, G, and B may be used. By using these color elements, it is possible to display a more realistic image. By using this, it is possible to reduce power consumption. There may be multiple element dots. In that case, each of the multiple color elements contributes to the display. The size of the area may be different. Alternatively, multiple dots of the same color element may be used. By controlling each of these, gradation can be expressed. This is called area gradation method. Alternatively, a plurality of dots of the same color element may be used, and the signal supplied to each dot may be The viewing angle may be widened by slightly differentiating the two. The pixel electrodes of the same color elements may have different potentials. The voltage applied to the crystal molecules varies depending on the pixel electrode. This makes it possible to widen the viewing angle. Yes, it is possible.

[0046] When showing a circuit diagram, one pixel represents one element that can control brightness. In such cases, one pixel is considered to represent one color element. The brightness is expressed by one of the color elements. Therefore, in this case, R (red), G (green), and B (blue) In the case of a color display device consisting of color elements of R and G, the smallest unit of the image is the R pixel and the G pixel. In some cases, it may be configured as three pixels, namely, pixel A and pixel B.

[0047] In some cases, pixels are arranged (arranged) in a matrix. The term "arranged in a trix" means that the pixels are arranged in a straight line in the vertical or horizontal direction. This includes cases where the elements are arranged side by side, or in a jagged line. For example, when displaying full color using three color elements (e.g., RGB), a stripe arrangement is used. This also includes cases where the dots of the three color elements are arranged in a delta arrangement. , including the case of Bayer arrangement. The size of the display area for each dot of the color element is This can reduce power consumption or extend the life of the display element. can be done.

[0048] In addition, the active matrix type has active elements in the pixels, or the active elements in the pixels A passive matrix system without the use of a polarizer can be used.

[0049] In the active matrix system, the active element (active element, nonlinear element) is a transistor. By using not only transistors but also various active elements (active elements, nonlinear elements), For example, MIM (Metal Insulator Metal) and TFD It is also possible to use a thin film diode (Thin Film Diode). Since the number of manufacturing steps is small, it is possible to reduce manufacturing costs and improve yields. Furthermore, the small size of the element allows for an improved aperture ratio, resulting in lower power consumption and higher brightness. It is possible to improve the quality.

[0050] In addition to the active matrix type, there are also active elements (active elements, non-linear It is also possible to use a passive matrix type that does not use active elements. Since it does not use any active elements or nonlinear elements, there are fewer manufacturing steps, which reduces manufacturing costs and It is possible to improve the accuracy. No active elements (active elements, non-linear elements) are used. Therefore, the aperture ratio can be improved, and it is possible to achieve low power consumption and high brightness.

[0051] A transistor is defined as a transistor having at least three terminals including a gate, a drain, and a source. The element has a channel region between a drain region and a source region. A current can flow through the drain region, the channel region, and the source region. The source and drain depend on the transistor structure and operating conditions, so it is difficult to know which is the source and which is the drain. Therefore, it is difficult to determine whether the source or drain is the source or drain. The region that functions as a source or drain is sometimes not called a source or drain. In some cases, they are referred to as the first terminal and the second terminal. They may be referred to as the first electrode and the second electrode. Alternatively, they may be referred to as the first region and the second region. There is a match.

[0052] The transistor has at least three terminals including a base, an emitter, and a collector. In this case, the emitter and the collector may be connected to the first terminal and the second terminal. It may be written as 2 terminals, etc.

[0053] Semiconductor devices include semiconductor elements (transistors, diodes, thyristors, etc.). Furthermore, it refers to devices that can function by utilizing the characteristics of semiconductors. The term "semiconductor device" can be used to refer to any device that has semiconductor material. He says.

[0054] Note that the display device refers to a device having a display element. The display device may include a plurality of pixels including a plurality of pixels. The peripheral driving circuit for driving a plurality of pixels may include a plurality of The display device may be formed on the same substrate as the pixel. Peripheral drive circuits arranged on the substrate by, for example, chip-on-glass (COG) It may include an IC chip connected by a wire or an IC chip connected by a tab or the like. The display device may include IC chips, resistors, capacitors, inductors, transistors, etc. The circuit may include a flexible printed circuit (FPC) to which The display device is connected via a flexible printed circuit (FPC) or other device, and the IC chip A printed circuit board on which chips, resistors, capacitors, inductors, transistors, etc. are mounted. The display device may include a polarizing plate or a retardation plate. The display device may include an illumination device, a housing, an audio input / output device, an optical sheet, and the like. It may also include an optical sensor.

[0055] The lighting device includes a backlight unit, a light guide plate, a prism sheet, a diffusion sheet, a reflector, It has a reflecting sheet, light source (LED, cold cathode fluorescent lamp, etc.), cooling device (water-cooled, air-cooled), etc. That's fine.

[0056] The light-emitting device refers to a device having a light-emitting element or the like. When a light emitting device has a light element, the light emitting device is a specific example of a display device.

[0057] The reflecting device is a device having a light reflecting element, a light diffracting element, a light reflecting electrode, etc. This is what is meant.

[0058] Note that the liquid crystal display device refers to a display device having a liquid crystal element. There are direct-view, projection, transmissive, reflective, and semi-transmissive types.

[0059] The driving device refers to a device that has semiconductor elements, electric circuits, and electronic circuits. For example, a transistor (selection transistor) that controls the input of a signal from a source signal line to a pixel (sometimes called a transistor or switching transistor) and supplies voltage or current to the pixel electrode. The transistors that supply a voltage or current to the light-emitting element are Furthermore, a circuit for supplying a signal to the gate signal line (a gate driver, a gate a circuit that supplies signals to the source signal lines (sometimes called a source line driver circuit, etc.), A driver (sometimes called a source line driver circuit) is an example of a driver.

[0060] In addition, the present invention is applicable to display devices, semiconductor devices, lighting devices, cooling devices, light-emitting devices, reflecting devices, driving devices, etc. For example, a display device may include a semiconductor device and a light emitting device. Alternatively, the semiconductor device may have a display device and a driving device. This may be the case.

[0061] Note that it is not explicitly stated that B is formed on A, or that B is formed on A. In the case of the above, it is not limited to B being formed on A in direct contact with it. This also includes cases where A and B are not in agreement, i.e., where another object is present between A and B. Here, A and B are objects (e.g., devices, elements, circuits, wiring, electrodes, terminals, conductive films, layers, etc.). , etc.).

[0062] Therefore, for example, it is not possible to explicitly state that layer B is formed on top of layer A (or on top of layer A). When described, it means that layer B is formed directly on layer A, and layer A is formed on layer B. Another layer (such as layer C or layer D) is formed directly on top of it, and layer B is formed directly on top of it. It should be noted that other layers (such as layers C and D) may be formed as follows: It may be a single layer or multiple layers.

[0063] Furthermore, the same applies to cases where it is explicitly stated that B is formed above A. It is not limited to B being directly on A, and there is another object between A and B. For example, if layer B is formed above layer A, In this case, there are two cases: when layer B is formed directly on top of layer A, and when layer B is formed directly on top of layer A. Another layer (such as layer C or layer D) is formed on top of it, and layer B is formed directly on top of it. It should be noted that other layers (such as layers C and D) may be used as single layers. It may be a multi-layer structure.

[0064] In addition, B is formed on A, B is formed on A, or B is above A. When explicitly stating that B is formed, this also includes the case where B is formed diagonally above. do.

[0065] The same applies to the case where B is below A, or B is below A.

[0066] In addition, it is preferable that anything explicitly stated as singular be in the singular. However, it is not limited to this, and plurals are also possible. It is preferable that the items described in the table be plural. However, this is not limited to this. It is also possible for the term to be singular.

[0067] It should be noted that in the drawings, the size, layer thickness, or area may be exaggerated for clarity. Therefore, it is not necessarily limited to that scale.

[0068] The figure is a schematic illustration of an ideal example, and is not limited to the shapes or values ​​shown in the figure. For example, variations in shape due to manufacturing technology, variations in shape due to errors, noise, etc. Variations in signals, voltages, or currents due to the above, or variations in signals, voltages, or currents due to timing differences , or current variations, etc.

[0069] In addition, when technical terms are used to describe a specific embodiment or example, Many, but not limited to these.

[0070] In addition, undefined terms (including scientific and technical terms such as technical terms or academic terms) It can be used as a meaning equivalent to the general meaning understood by a person of ordinary skill in the art. Any words defined in the present application or elsewhere in this application shall be construed in a manner consistent with the background of the relevant art. It is preferable that:

[0071] It should be noted that the terms first, second, third, etc., refer to various elements, members, regions, layers, and sections in relation to one another. Therefore, the words "first," "second," "third," etc. are used to distinguish between elements, It is not intended to limit the number of members, regions, layers, areas, etc. Furthermore, for example, "first" may be used to refer to It is possible to replace it with "second" or "third", etc. [Effects of the Invention]

[0072] This makes it possible to improve image quality. [Brief explanation of the drawings]

[0073] [Figure 1] 1A to 1E are diagrams illustrating a flow according to an example of an embodiment, and FIG. 1F is a diagram illustrating a circuit. [Figure 2] 1A to 1D are diagrams illustrating a flow according to an example of an embodiment. [Figure 3] 1A to 1C are diagrams illustrating a display screen according to an example of an embodiment. [Figure 4] 1A to 1F are diagrams illustrating a flow according to an example of an embodiment. [Figure 5] 1A to 1D are diagrams illustrating a flow according to an example of an embodiment. [Figure 6] 1A to 1D are diagrams illustrating a flow according to an example of an embodiment. [Figure 7] 1A and 1B are diagrams illustrating a flow according to an example of an embodiment. [Figure 8] 1A and 1B are diagrams illustrating a flow according to an example of an embodiment. [Figure 9] FIG. 10 is a diagram illustrating a flow according to an example of an embodiment. [Figure 10] 1A and 1B are a top view and a cross-sectional view, respectively, illustrating a device according to an embodiment of the present invention. [Figure 11] 1A and 1C are top views, and 1B and 1D are cross-sectional views illustrating a device according to an example of an embodiment. [Figure 12] 1A, 1C, and 1E are diagrams for explaining voltages of a display element according to an example of an embodiment, and 1B, 1C, and 1E are diagrams for explaining transmittances of the display element according to an example of an embodiment. [Figure 13] 1A to 1C are diagrams illustrating a display screen according to an example of an embodiment. [Figure 14] 1A to 1G are diagrams illustrating circuits according to an example of an embodiment. [Figure 15] 1A to 1H are diagrams illustrating circuits according to an example of an embodiment. [Figure 16] 1A and 1B illustrate a structure of a display device according to an example of an embodiment. [Figure 17] 1A to 1E illustrate a structure of a display device according to an example of an embodiment. [Figure 18] 1A to 1C are cross-sectional views illustrating a structure of a transistor according to an example of an embodiment. [Figure 19] 1A to 1H illustrate electronic devices according to an example of an embodiment. [Figure 20] 1A to 1H illustrate electronic devices according to an example of an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0074] Hereinafter, embodiments will be described with reference to the drawings. It is possible to implement the present invention in various ways without departing from the spirit and scope of the present invention. It will be readily understood by those skilled in the art that various modifications may be made to the details of the present invention. It should not be construed as being limited to the contents of the description below. A part or a part having a similar function is indicated by a common reference numeral in different drawings, and the same part is Alternatively, detailed descriptions of parts having similar functions will be omitted.

[0075] The contents (or even a part of the contents) described in one embodiment may be used in the embodiment. Another content (or part of the content) described in the form, and / or one or more other implementations The contents (or a part of the contents) described in the embodiments may be applied, combined, or replaced. You can do things like drawing.

[0076] The contents described in the embodiments are explained using various drawings in each embodiment. This refers to the content described in the specification or the content described using the text in the specification.

[0077] In addition, a drawing (or a part thereof) described in one embodiment may be replaced with another part of the drawing. , another figure (or a part thereof) described in the embodiment, and / or one or more By combining the figures (or a part thereof) described in other embodiments of the present invention, This allows for even more diagrams to be constructed.

[0078] (Embodiment 1) Super-resolution processing is a process that generates a high-resolution image from a low-resolution image. Alternatively, super-resolution processing is a method of reducing the amount of information that is lost during shooting or signal transmission. Therefore, due to the low resolution, fine details may not be visible. By performing super-resolution processing on the averaged image, even the finer details can be accurately recognized. Therefore, it is possible to generate images with such high resolution. When you display it, you can display a high-quality image. For example, In parks with lots of small leaves, or in trees with lots of small leaves, By using super-resolution processing, each stone and each tiny leaf can be accurately identified. Similarly, blurred characters that were previously unreadable can be made clearer by using super-resolution processing. This allows you to recognize small details and read accurately. For example, super-resolution processing restores image information from an image with a resolution of 1440 x 1080. By using this, it creates an image with a resolution of 1920 x 1080 (number of pixels). In other words, super-resolution processing is the process of converting the resolution of an image while increasing the amount of information in the image from the original. It can be said that super-resolution processing is a technology that can enhance the information contained in an image. Among these, the frequency components higher than the Nyquist frequency determined by the sampling frequency of the input image are restored. It can also be said that it is a technology that originates from

[0079] However, if various processes are performed on the image before super-resolution processing, The image information changes. Super-resolution processing is a process that creates a new high-resolution image. Therefore, various image and display processing steps are required to accurately create high-resolution images. It is desirable to perform super-resolution processing using an image that has not undergone super-resolution processing. After the processing, various processes are preferably performed. Not limited.

[0080] Figure 1 shows an example of a processing flow in which various processes are performed after super-resolution processing. Shows.

[0081] In Figure 1(A), the image signal obtained from the image source is used to perform super-resolution processing and increase the resolution. The processing flow for performing edge enhancement processing after the image is enhanced is shown below. , various further processing may occur, and then the image may be displayed.

[0082] In this way, by performing super-resolution processing before edge enhancement processing, the resolution can be accurately The image before super-resolution processing has not undergone edge enhancement processing. Therefore, no unnecessary processing is performed, and accurate super-resolution processing can be performed. Then, using the more accurate, higher resolution images created by super-resolution processing, By performing edge enhancement processing, it is possible to obtain the edges of objects in the image more accurately. Therefore, to obtain a good quality image, To achieve this, it is important to perform super-resolution processing before edge enhancement processing. An example of the form is not limited to this.

[0083] It should be noted that the edge enhancement process is not limited to the above example, and may be applied to other images. Other image processing can be performed, such as smoothing, distortion, etc. Correction, error processing, blemish correction, color correction, etc. instead of or in addition to edge enhancement processing In addition to the processing, it is possible to perform color correction to adjust the NTSC ratio. You can convert an image below 100% to an image above 100%. It is possible to display a high-purity image.

[0084] It is possible for various other processes to be performed before and after each stage in the processing flow. Examples of other various processes include super-resolution processing, edge enhancement processing, frame interpolation processing, and There are processes such as overdrive processing, local dimming processing, IP conversion processing, and enlargement processing. Additionally, other processes are possible.

[0085] The image source may be a TV broadcast signal sent from a broadcasting station, and / or Or the image source is DVD (for Blu-ray, etc.) optical storage media (including magnetic storage media or magneto-optical storage media) such as CDs, streams Signals obtained from mobile phones, the Internet, etc., and / or images generated from such signals. Or the image source is a mobile phone, a computer, a CPU, a graphics Signals obtained from microcomputers, controllers, electronic devices, etc. for the Image sources also contain images generated from the It includes a signal and / or an image generated from that signal.

[0086] It should be noted that the images include still images and / or video images and / or videos.

[0087] The image source can be an interlaced image or a progressive image. It can be a non-interlaced (non-interlaced) image or The image source is IP conversion, a process that converts an interlaced image into a progressive image. It is possible that the image has already undergone conversion (interlace-progressive conversion). Alternatively, IP conversion can be performed before super-resolution processing. ,Figure 1 shows a part of the processing flow when super-resolution processing is performed using progressive images. 2(B) shows the processing flow when super-resolution processing is performed after IP conversion of an interlaced image. A portion of the row is shown.

[0088] Usually, super-resolution processing is performed on one image (or part of it), or multiple images (or The super-resolution process is performed using images from the original image (part of the original image). By creating new information, a high-resolution image is created. In order to perform super-resolution processing, it is necessary to deal with the fact that some image information is missing, such as interlaced images. Therefore, the image to be super-resolution processed should be a progressive (non- It is desirable that the image is interlaced or non-interlaced. In the case of progressive images, IP conversion is performed before super-resolution processing. It is desirable to perform super-resolution processing using these images. Not limited to.

[0089] As shown in Figure 2(C), the resolution (number of pixels) of the image before super-resolution processing is It is desirable that the resolution (number of pixels) of the image after super-resolution processing is higher, but in practice An example of an embodiment is not limited to this. For example, before performing the super-resolution processing, enlargement processing or the like may be performed. In this case, the resolution (or number of pixels) is already high. Because the resolution is high, the resolution itself does not change before and after super-resolution processing. The enlargement process before the resolution process does not restore the missing image information. However, the image is simply enlarged, so the image itself is not of high quality. Parks with lots of granite stones or trees with lots of small leaves In these cases, each small stone and each tiny leaf can be seen precisely through enlargement processing. It will not be displayed, but will simply be enlarged and remain blurry. Therefore, by performing super-resolution processing, the image resolution (number of pixels) does not change, but the missing parts are The lost image information is restored, resulting in a high-quality image in which even the finest details can be identified. In other words, as shown in Figure 2(D), a 1440 x 1080 image can be displayed in 19 Enlarge the image to 20x1080, and then resize the 1920x1080 image to 1920x1080. It is also possible to perform super-resolution processing on images of 1440 x 1080. When enlarging an image to 1920x1080, no information is restored. After processing, the information is restored, allowing you to accurately identify and view even the smallest details. Yes, it is possible.

[0090] The resolution is increased by enlargement processing, and then further reduced by super-resolution processing. For example, you can convert an 800x600 image to a 1440x1080 image. The image is enlarged and the 1440 x 1080 image is super-resolved to a 1920 x 1080 image. However, if the resolution is increased by enlarging the image, the information may be lost. However, when the resolution is increased by super-resolution processing, the information is not restored. However, the example of the embodiment is not limited to this.

[0091] Alternatively, the resolution can be increased by super-resolution processing, and then the resolution can be reduced by enlarging the image. For example, you can convert an 800x600 image to a 1440x1080 image. The image is then super-resolution processed and enlarged from 1440 x 1080 to 1920 x 1080. However, if the resolution is increased by enlarging the image, the information However, when the resolution is increased by super-resolution processing, the information is not restored. However, the example of the embodiment is not limited to this.

[0092] As an example of the enlargement process, the bilinear method or the bicubic method may be used. The bilinear method collects and calculates the four surrounding pixels, and when enlarged, This is a method of interpolating missing pixels. Or, in the bicubic method, the coordinate system after transformation The 16 pixel values ​​of 4x4 are extracted from the source. The values ​​of the 16 points are weighted and a weighted average calculation is performed to determine the pixel value after conversion.

[0093] In this way, it is important to perform super-resolution processing before performing edge enhancement processing, etc. After processing, edge enhancement and other processes can be performed to accurately create high-resolution images. Furthermore, it is possible to accurately enhance edges. The principle is not limited to edge enhancement, but can be similarly applied to other processes. Therefore, the contents or drawings described in the case of edge enhancement processing can be similarly applied to other processing. Similarly, the content or drawings described when performing one process are The same can be applied to the other processing.

[0094] For example, the processing flow for frame interpolation after super-resolution processing is shown in Figure 1(B). Frame interpolation is a process of increasing the frame frequency to reduce afterimages. This is the process of interpolating frame data when creating a frame. For example, In the first frame, the circle is displayed on the left edge, and in the second frame, , the circle moves from left to right, so it is displayed at the right end. At this time, the circle is in the center. This process of creating data is called frame interpolation. Then, by frame interpolation processing, the number of interpolated frames is displayed. In this way, it is possible to increase the frame frequency. By increasing the frame rate, the circle moves from left to right. This allows for a clearer image to be displayed, and reduces the afterimage. This can improve the image characteristics.

[0095] In this way, frame interpolation processing is performed, and the frame frequency is increased accordingly. For example, when the frame frequency is doubled, it is called double speed driving. When the frame frequency is four times faster, it is called quadruple speed drive. The image is then interpolated to create the same number of frames as the original. Since the total amount of data is doubled, the frame rate can be doubled. Similarly, in the case of 4x speed driving, frame interpolation processing is used to generate three times the number of frames as the original. This results in a total of four times the amount of data, so the frame rate By driving at double speed like this, the video characteristics can be improved. This can improve the image quality and reduce the afterimage. It is desirable that the display device is a glass-type display device, such as a liquid crystal display or an organic EL display. It is suitable for application to a display device such as a ray. Since afterimages are easily visible on a hold-type display device, By using double speed driving, it is possible to reduce afterimages.

[0096] In this way, by performing super-resolution processing before frame interpolation processing, accurate resolution can be achieved. The image before super-resolution processing is processed by frame interpolation. Therefore, no unnecessary processing is performed, and the super-resolution processing can be performed accurately. And the more accurate and higher resolution images produced by super-resolution processing can be By using this to perform frame interpolation processing, it is possible to obtain frame interpolation data more accurately. This allows for smoother images with less residual image. To obtain high-quality images, it is important to perform super-resolution processing before performing frame interpolation. However, the embodiment is not limited to this.

[0097] Here, for an image with horizontal resolution (number of pixels) A and vertical resolution (number of pixels) B, By performing super-resolution processing, the horizontal resolution (number of pixels) becomes C and the vertical resolution (number of pixels) becomes D. Or, the horizontal resolution (number of pixels) is A and the vertical resolution (number of pixels) is B. By enlarging and super-resolution processing the image, the horizontal resolution (pixel The image has a resolution of C and a vertical resolution of D. By doing so, the magnification when the resolution is increased is C / A, which is the number obtained by dividing C by A, or Or, it can be said that it is D / B, which is the number obtained by dividing D by B. On the other hand, when double speed driving is performed, Suppose the frame frequency is increased by N times.

[0098] In this case, it is desirable that N>(C / A) or N>(D / B). It is desirable that N≧(C / A) and N≧(D / B). Examples are not limited to this.

[0099] When frame interpolation is performed for double-speed driving, the number of frame data to be interpolated is large. For example, in the case of Figure 3(A), the data can be created without any problems. However, by adjusting the position of the circle, as shown in Figure 3(B), it can be easily made three times faster. In other words, the frame interpolation process for double-speed driving is Even if the number of frames is large, the image will not be affected significantly. By increasing the number of frame data, the video characteristics can be further improved. It is possible to further reduce the afterimage.

[0100] On the other hand, super-resolution processing restores the resolution information that was lost during shooting and signal transmission. Therefore, if too much information is lost, Therefore, it is difficult to fully restore it. If B) is made too large, problems will occur with the image itself, causing it to become distorted.

[0101] From the above, when both frame interpolation and super-resolution processing are performed, N>(C / A ), or N>(D / B). Or, N≧(C / A) and N Therefore, it is desirable that both the super-resolution processing and the frame interpolation processing are performed. When the image is processed, by satisfying this relationship, even the finer details can be seen clearly. Furthermore, it is possible to display high quality images without any afterimage. An example of this is not limited to this.

[0102] When frame interpolation is performed, the frame is interpolated in the area where there is movement. In many cases, new data is created for the purpose of the image interpolation process. In most cases, data is not newly created in areas where there is no data. The frame interpolation process creates new data in the area where the new data is created, and For example, in the case of Figure 3(A), as shown in Figure 3(C), In the area 301 and the area 303, the data of the first frame before interpolation and the data of the second frame before interpolation are stored. Therefore, even the interpolated frame data does not change. No new data is created, and the data is the first frame before interpolation, or The data is created using the data of the second frame before interpolation. So, there is a change between the data of the first frame before interpolation and the data of the second frame before interpolation. Therefore, there are areas where the circles are erased and areas where circles are created, so new data is being created. This will be the case.

[0103] In this way, when frame interpolation processing is performed, new data is created within the screen. There may be areas where new data is created and areas where new data is not created. The area changes from moment to moment. For example, an example of an area where data is created is a caption. In this case, characters are displayed and move up and down or left and right. When letters or symbols become difficult to see due to afterimages, it can be difficult to recognize what kind of letters or symbols they are. This becomes a major problem because it becomes impossible to determine whether the

[0104] In this way, when frame interpolation is performed, new images are added only to a part of the screen. Creating new data can improve processing speed, reduce power consumption, or This has the advantage of improving accuracy.

[0105] On the other hand, super-resolution processing is not performed on the entire screen, but on only some areas. In this way, it is possible to perform super-resolution only in a part of the screen. When processing, it is necessary to improve the processing speed, reduce power consumption, improve processing accuracy, or reduce image quality. This has the advantage of reducing

[0106] Therefore, within the screen, the first time new data is created for frame interpolation processing, There is a first area where super-resolution processing is performed, and a second area where frame interpolation processing is performed. Therefore, there is a third region where no new data is created and no super-resolution processing is performed. It is also possible to set the area where the first area and the second area do not overlap within the screen. Alternatively, the first region and the second region can be present in an overlapping region. The area can be present within the screen.

[0107] New data is created for frame interpolation processing, such as text and symbols. In most cases, super-resolution processing is performed on images with little movement. Therefore, new frames are generated within the screen for frame interpolation processing. The first area where new data is created and the second area where super-resolution processing is performed do not overlap. The reason is as follows: In the first area, where new data is created for image processing, there is movement, so there is no residual image. In order to prevent this from being visible, new data is created for frame interpolation processing. In such moving areas, even if you use super-resolution processing to increase the resolution, the eye cannot perceive the resolution. Therefore, in such areas of motion, it may be difficult to recognize the degree of In the second case, the super-resolution processing is not performed. In this area, it is desirable to be able to see even the finer details, and it is necessary to have a still, motionless area. When displaying still images, even the finer details are clearly visible. Since this situation may occur, the frame interpolation process and the super-resolution process Both processes are performed, and it is possible to display a screen that has the advantages of both, and The first area is where new data is created for frame interpolation processing, and the second area is where super-resolution processing is performed. It is possible for the two regions to have non-overlapping areas, resulting in a more appropriate image. However, the embodiment is not limited to this.

[0108] Next, similar to the edge enhancement process and frame interpolation process, the process performed after the super-resolution process is As a process for overdrive processing, the process flow is shown in Figure 1(C). Therefore, the contents or drawings described in the case of edge enhancement processing are similarly applicable to other processing. Similarly, the content or drawings described in relation to a particular process can be applied to The same can be applied to other processes.

[0109] Overdrive processing is a process for increasing the response speed of liquid crystal elements. Each pixel in the screen is supplied with a signal that matches the gradation that you want to display at that pixel. In the case of LCD devices, the response speed is slow, so even if a signal that matches the grayscale is supplied, During this time, it was not possible to display the gradation in accordance with the original tone, and after several frames had elapsed, the gradation finally appeared. Therefore, when supplying voltage to the liquid crystal element, the original Instead of supplying a voltage that matches the gradation, a voltage with a larger amplitude is supplied to the liquid crystal element. As a result, the transmittance of the liquid crystal element changes suddenly. The above operation can increase the response speed of the liquid crystal element. A voltage with a larger amplitude than the voltage that matches the original gradation is applied to the The act of temporarily supplying a voltage to the liquid crystal element before supplying a voltage is called overdrive. Then, how much voltage should be used as a voltage with a larger amplitude value than the voltage that matches the original gradation? The process of determining whether to supply the voltage is called overdrive processing.

[0110] In this way, by performing overdrive processing after super-resolution processing, the response The response speed can be increased, the amount of overdrive can be set to an appropriate value, and the remaining It is possible to display a small image. Alternatively, super-resolution processing is a process that creates a new image. Therefore, the image changes due to this processing. Accordingly, the gradation of each pixel changes. Therefore, by performing overdrive processing after super-resolution processing, The overdrive processing can be changed according to the amount of change caused by the super-resolution processing. Therefore, by performing overdrive processing after super-resolution processing, This allows the amount of overdrive to be set to an appropriate level, allowing each pixel to be displayed at the optimum gradation. This allows for faster response and accurate overdrive. Furthermore, super-resolution processing allows high-resolution displays without image retention. Therefore, in order to obtain a good quality image, overdrive processing is required. However, in one embodiment, it is important to perform super-resolution processing before performing the above. Not limited.

[0111] Here, the overdrive amount is the amount of the change in the liquid crystal element caused by the overdrive process. The amplitude of the voltage supplied to the amplifier increases, and this refers to the amount of voltage increase at that time.

[0112] In addition, overdrive processing is performed in areas where there is movement on the screen. In areas of the screen where there is no movement, afterimages do not occur, so In other words, overdrive processing is rarely performed within the screen. There are areas where overdrive processing is performed and areas where overdrive processing is not performed. These areas change from moment to moment. In this way, only a part of the screen When overdrive processing is performed, the processing speed can be improved, power consumption can be reduced, or processing accuracy can be improved. This has the advantage of improving

[0113] On the other hand, super-resolution processing is not performed on the entire screen, but on only some areas. In this way, it is possible to perform super-resolution only in a part of the screen. When processing, it is necessary to improve the processing speed, reduce power consumption, improve processing accuracy, or reduce image quality. This has the advantage of reducing

[0114] When processing is performed in a partial area of ​​the screen, overdrive processing is performed within the screen. There is a first area where super-resolution processing is performed and a second area where super-resolution processing is performed. There may be a third area where no processing is performed. It is possible to have an area on the screen that does not overlap with the first area. It is possible that an area where the first area and the second area overlap exists within the screen.

[0115] Therefore, the first area where overdrive processing is performed and the second area where super-resolution processing is performed are In such a situation, overdrive The first area where processing is performed is an area where there is movement, so in order to prevent afterimages from being visible, However, in such a moving area, if Even if the resolution is increased through super-resolution processing, it may be difficult for the eye to recognize the resolution. Therefore, in such moving areas, super-resolution processing may not be performed. As a result, in such cases, the first region where overdrive processing is performed and the second region where super-resolution processing is performed may have an area where they do not overlap. In such a case, the second region where the super-resolution processing is performed has fine It is desirable to be able to see every part clearly, and it is not good to use static images. When you view the image, you can see the fine details clearly. The first area where the overdrive processing is performed and the second area where the super-resolution processing is performed overlap. It can be said that there may be areas where this is not possible.

[0116] A first area where overdrive processing is performed and a second area where super-resolution processing is performed are In the overlapping area, the response speed is fast, there is little image retention, and even the finer details are clearly visible. This allows for a more realistic image to be displayed.

[0117] Up until now, after super-resolution processing, edge enhancement processing, frame interpolation processing, and overdrive processing have been performed. However, the processing performed after the super-resolution processing is not limited to these. As with edge enhancement, frame interpolation, and overdrive processing, After image processing, local dimming (local brightness control of the backlight) processing can also be performed. The processing flow in this case is shown in Figure 1(D). The contents or drawings described when performing frame interpolation processing or overdrive processing are This can also be applied when performing backlight local brightness control. Similarly, when local dimming (local brightness control of the backlight) is performed, The contents or drawings described in this case may be similarly applied to other processes. be.

[0118] Here, local dimming (local brightness control of the backlight) refers to the process of controlling the brightness of each area of ​​the screen. This is a technology that changes the brightness of the backlight to display images. Depending on the image, the brightness of the backlight will differ for each area within a single screen. For example, if there is an area on the screen that displays low gradations, the backlight brightness of that area can be adjusted. Furthermore, if there is an area on the screen that displays high gradations, Then, based on the backlight brightness, The transmittance is determined so that the correct image can be displayed. This allows the low gradation to be displayed on the screen. In the display area, the brightness of the backlight itself is low, so the effect of light leakage can be reduced. Therefore, if you want to display black in such an area, you can use it as complete black. In addition, in areas of the screen where high gradation is displayed, the backlight The brightness of the LCD itself is also high, so it can display a sufficiently bright image. In the area where you want to display white, you should increase the brightness to a level higher than normal white, and Therefore, it is possible to improve the contrast. This allows for sharper images to be displayed. Since the brightness of the backlight itself can be reduced, power consumption can be reduced. Therefore, in order to perform local dimming, the background of each area needs to be adjusted according to the image you want to display. I want to display the image based on the process to determine the brightness of the light and the backlight brightness. There is a process to determine the transmittance of each pixel so that the image can be displayed correctly. The above processing, or a part of this processing, is called local dimming processing. Therefore, local dimming is a process that determines the backlight brightness for each area. After this, it is possible to carry out a process to determine the video signal to be supplied to each pixel. However, the embodiment is not limited to this. The process of determining the brightness of the light and the process of determining the video signal to be supplied to each pixel are separated. The processing flow when described can also be expressed as shown in Figure 1(E).

[0119] In this way, it is preferable to perform local dimming processing after performing super-resolution processing. When super-resolution processing is performed, it is as if new information has been added by restoring the information. Therefore, the number of gray levels for each pixel may be different before and after the super-resolution processing. Before and after the super-resolution process, there will be areas on the screen where the number of pixel gradations changes. Therefore, after the image information is restored by the super-resolution process, the local By performing local dimming processing, accurate local dimming processing can be performed. This improves the contrast and allows for accurate image display. Therefore, to obtain a good quality image, it is recommended to perform super-resolution processing before performing local dimming processing. It is also important to adjust the brightness of the backlight in local dimming processing. It is important to perform super-resolution processing before performing processing to determine the local In the saturation processing, the super-resolution processing is performed before the processing that determines the video signal to be supplied to the pixel. However, the embodiment is not limited to this example.

[0120] Furthermore, when local dimming is in use, the backlight brightness is reduced. Therefore, even if the transmittance of the pixel changes slightly, the actual display gradation does not change much. In other words, when the backlight brightness is low, the transmittance of the pixel is changed. This makes it possible to express finer gradations. Therefore, local dimming and super-resolution processing By performing both of these functions, high-resolution images can be displayed with high expressiveness, allowing even fine details to be distinguished. In particular, it is possible to properly express gradation in dark gradation areas on the screen. This makes it possible to avoid displaying images with a loss of gradation.

[0121] In addition, in areas of the screen where there are many displays with small gradations, local dimming processing is performed. In areas of the screen where a large number of gradations are displayed, In areas with high brightness and many bright displays, it is difficult to reduce the brightness of the backlight. Local dimming is rarely performed. There are areas where local dimming processing is performed and areas where local dimming processing is not performed. These areas change from moment to moment. When local dimming is performed only in the has advantages such as improved processing accuracy.

[0122] On the other hand, super-resolution processing is not performed on the entire screen, but on only some areas. In this way, it is possible to perform super-resolution only in a part of the screen. When processing, it is necessary to improve the processing speed, reduce power consumption, improve processing accuracy, or reduce image quality. This has the advantage of reducing

[0123] When processing is performed in a partial area of ​​the screen, local dimming processing is performed within the screen. A first area is subjected to the super-resolution process, and the brightness of the backlight is reduced. A second area is subjected to the super-resolution process. Furthermore, both local dimming and super-resolution processing are performed. There may be a third area where local dimming is not possible. The first area is divided into a first area where the backlight brightness is reduced and a second area where super-resolution processing is performed. However, it is possible for a non-overlapping area to exist within the screen. It is possible for an area where the first area and the second area overlap to exist within the screen.

[0124] a first region in which local dimming processing is performed to reduce the brightness of the backlight; In the area where the super-resolution processing overlaps with the second area, the contrast is high and the image is smooth. The image is capable of expressing gradation and allows you to see even the finer details clearly, making it realistic. It is possible to display a visually appealing image.

[0125] When local dimming is performed, the screen is divided into multiple areas, and each area Each backlight is arranged. The length (or width) of the area, or The pitch and the area of ​​the image where super-resolution processing has been performed on some areas of the screen to show the area of ​​the image with improved resolution. When compared with the length (or width) or pitch of the pixels of the display device, It is preferable that the length (or width) of the region or the pitch of the region is longer. This is because local dimming not only affects the brightness of the backlight in each area, but also the image brightness. The transparency of the image is also controlled to display the image. Therefore, the image is displayed after super-resolution processing. Even if the length (or width) of the backlight area or the pitch of the area is Even if it is long, as long as the pitch of each pixel is short, it is possible to display a clear, high-resolution image. .

[0126] The processing flow is shown in Figure 1(A) to Figure 1(E). An example of the configuration (block diagram) in this case is shown in FIG. The output terminal of the circuit 101 is connected to the input terminal of the circuit 102. The circuit 101 has a function of performing super-resolution processing. The circuit 102 has a function of performing edge enhancement processing. , frame interpolation processing, overdrive processing, or local dimming processing. The circuit 101 or the circuit 102 is a memory circuit (memory ) or the circuit 101 or the circuit 102 may have a It is possible to have a unit of

[0127] Note that the circuit 101 and / or the circuit 102 may implement their respective functions using hardware. It is possible to realize the function by using a computer or software. However, it is also possible to realize the function using both hardware and software. By using software, it is possible to increase the processing speed. It is possible to reduce power consumption. By changing the content, it becomes possible to perform various processes appropriately.

[0128] In addition, even if the number of processes increases, the number of processes can be increased by adding circuits such as circuit 101 and circuit 102. Thus, a circuit similar to that shown in FIG. 1(F) can be configured.

[0129] In the above and / or the following, super-resolution processing Instead, it is also possible to simply perform enlargement processing.

[0130] (Embodiment 2) Next, we will explain an example of super-resolution processing technology. By performing super-resolution processing, This makes it possible to display a clear image.

[0131] First, a region with motion is detected and velocity information of the region is extracted. For an image at a point, it is a vector that represents the flow of each pixel from the two images before and after it. Then, the optical flow is calculated from the extracted velocity information. The amount of displacement is detected with an accuracy of less than one pixel. Then, based on the detected amount of misalignment, the amount of misalignment between the images is calculated. By performing this process, the physical solution can be obtained. It is possible to generate high-resolution images that exceed the resolution of conventional super-resolution processing. The information for high-resolution image restoration is generated based on the motion vector information from the low-resolution image. It can be said that it is a technology for extracting and restoring information.

[0132] As a method of similar super-resolution processing technology, for example, first, highly correlated consecutive images are extracted from the image. Then, motion vectors of the video are detected with precision close to the pixel level. Then, pixel-by-pixel motion is tracked and the change information of the tracked pixels between each frame is recorded. The missing high-resolution pixels are then inferred from the information. Therefore, even though the same part is being photographed, the low-resolution part photographed appears distorted. The difference between frames is that the missing pixels are filled in, and the image quality is improved. In other words, this processing method searches deeply in the time direction. In this case, the motion vector is used to calculate the super-resolution image. This allows for precise capture of inter-frame information that could not be obtained due to camera resolution during shooting. It is also possible to restore the missing pixels.

[0133] Alternatively, another super-resolution process is to investigate similarities across multiple frames. Similar frames are aligned to understand the temporal changes in each pixel. , and predictively generate the missing high-resolution pixels.

[0134] Alternatively, as another super-resolution process, first, a series of multiple image information is analyzed. The common areas of the subject are corrected to restore the high frequency components. This results in a high resolution image. You can get the following.

[0135] Alternatively, a reconstruction-type super-resolution processing method can be used as another super-resolution processing method. In the reconstruction-based super-resolution processing method, first, a high-resolution image (initial high-resolution image) is generated from the original low-resolution image. Then, from the assumed high-resolution image, the Based on the point spread function (PSF) that is calculated, the pixel value is calculated for each pixel in all low-resolution images. In other words, it is down-converted using a unique function (imaging model function) to Create a low-resolution image with the same resolution as the image, and compare the estimated values ​​with the observed pixel values. Then, the difference between the image before down-conversion and the image before down-conversion becomes smaller. This search process is repeated until convergence is reached, and the accuracy is improved. It is possible to improve the search speed or to search only once. , high resolution images can be obtained.

[0136] As an imaging model function, for example, a one-dimensional linear filter is used in vertical and horizontal directions, two dimensions, and It is possible to use a digitized image sensor model.

[0137] In this reconstruction-based super-resolution processing method, the initial high-resolution image is required for repeated calculations. The method of calculation is to reconstruct a high-resolution image. L(Maximum-likelihood) method, MAP(Maximum A Pos terior) method or POCS (Projection On to Conve x Sets) method can be used.

[0138] In the ML method, the estimated pixel values ​​from the assumed high-resolution image and the actually observed pixel values ​​are The square error of the evaluation function is used. Then, we select a high-resolution image that minimizes the evaluation function. This is a method of using an estimated image.

[0139] The MAP method minimizes the evaluation function that adds probability information of high-resolution images to the square error. In other words, the MAP method is a method for estimating a high-resolution image. Using prior information, we estimate high-resolution images as an optimization problem to maximize the posterior probability. This is a resolution processing method.

[0140] The POCS method creates simultaneous equations for the pixel values ​​of high-resolution and low-resolution images, and This is a method of solving the equations sequentially.

[0141] Note that multiple frames of an image are synthesized into one frame. Increase the number to increase the resolution of the image. At the same time, try to cancel the aliasing component. This makes it possible to perform high-resolution processing.

[0142] Alternatively, iterative methods, frequency domain methods, statistical methods, etc. can be used as super-resolution processing methods. It is possible. The iterative method mainly consists of three steps. First, an initial guess is made. Second, there is the imaging process, and third, there is the reconstruction process.

[0143] It should be noted that super-resolution processing can be performed on the entire screen. Examples of the form are not limited to these. Super-resolution processing may be performed depending on the content of the image. For example, in the image, super-resolution processing is not performed on the edge or flat area, and the In the image capture section, it is possible to perform super-resolution processing. Then, we perform super-resolution processing only on the high frequency region. In this way, by controlling whether or not to perform super-resolution processing depending on the image, This makes it possible to reduce the possibility of the image being deteriorated.

[0144] The flat area is a region where the frequency of a specific frequency range or a concentrated luminance range is highly distributed. Therefore, the sky with a relatively smooth color distribution and a blurred background are examples of this. Therefore, this is the area in the image where gradation expression is the main focus. It is possible to do this.

[0145] The texture part is the part of the image with high frequency. Since the number is high, there is a high possibility that there are more details. By performing super-resolution processing on the image, the effect of increasing the resolution is extremely large. This can be done.

[0146] When performing super-resolution processing, the resolution is recognized in various areas of the image. It is also possible to perform super-resolution processing with different strengths for each region.

[0147] If the resolution of the original image is high enough, super-resolution processing should not be performed. is possible.

[0148] As described above, there are various super-resolution processing techniques, but the super-resolution processing technique in this specification is Not limited to these.

[0149] (Embodiment 3) In the first and second embodiments, the super-resolution processing and other processing, for example, the edge enhancement processing, are performed. processing, frame interpolation processing, overdrive processing, local dimming (local dimming of backlight) However, in this embodiment, the above-mentioned processing is not limited to the above. In addition to super-resolution processing and other processing, edge enhancement processing, frame interpolation processing, overlay processing, etc. Processes such as power drive processing and local dimming (local brightness control of the backlight) processing. It is also possible to do more.

[0150] Therefore, the contents (or a part thereof) described in the first and second embodiments, It is possible to combine and apply the above-mentioned components to this embodiment. .

[0151] For example, the processing flow when another process is performed in addition to the super-resolution process and the edge enhancement process is as follows: This is shown in Figure 4. In other words, if another process is performed on the contents described in Figure 1(A), However, the embodiment is not limited to these.

[0152] In Figure 4(A), the image signal obtained from the image source is used to perform super-resolution processing, and the resolution is increased. After the frame frequency is increased, frame interpolation processing is performed, and after the frame frequency is increased, edge enhancement processing is performed. Therefore, the processing flow in FIG. 4(A) is the same as that in FIG. 1(B). This also corresponds to the case where edge enhancement processing is performed after the processing flow. The low-level processing corresponds to the processing flow in FIG. 1(A) when frame interpolation processing is performed. .

[0153] After the edge enhancement process, various other processes are performed, and then the image is displayed. It is possible to do this.

[0154] In this way, the super-resolution process is performed before the frame interpolation process and the edge enhancement process. By doing so, the resolution can be improved accurately. Since no frame interpolation or edge enhancement processing is performed, no unnecessary processing is performed. Therefore, the super-resolution processing can be performed accurately.

[0155] Then, by using more accurate and higher resolution images, frame interpolation processing can be performed. Frame interpolation data can be obtained more accurately, resulting in smoother images with less afterimages. In particular, because frame interpolation is performed before edge enhancement, This allows for accurate frame interpolation data creation, resulting in more accurate and higher resolution images. By using high-resolution images and performing edge enhancement processing, the edges of objects in the image can be captured more accurately. This allows you to get a clearer image.

[0156] In Figure 4(B), the image signal obtained from the image source is used to perform super-resolution processing, and the resolution is increased. After increasing the frame frequency, edge enhancement processing is performed, and then frame interpolation processing is performed. The processing flow in FIG. 4(B) is the same as that in FIG. 1(B). This also corresponds to the case where edge enhancement processing is performed on the processing flow of FIG. The processing flow also corresponds to the case where frame interpolation processing is performed after the processing flow of FIG. 1(A). do.

[0157] After the frame interpolation process, various other processes are performed, and then the image is displayed. It is possible to show.

[0158] In this way, the super-resolution process is performed before the edge enhancement process and the frame interpolation process. By doing this, the resolution can be improved accurately. The image before super-resolution processing has edges. Since no emphasis processing or frame interpolation processing is performed, no unnecessary processing is performed. Therefore, the super-resolution processing can be performed accurately.

[0159] Then, by using more accurate and higher resolution images, frame interpolation processing can be performed. Frame interpolation data can be obtained more accurately, resulting in smoother images with less afterimages. Furthermore, before frame interpolation processing, edge enhancement processing is performed. Therefore, the amount of data to be processed for edge enhancement is small, and the processing time can be shortened. do.

[0160] In Figure 4(C), the image signal obtained from the image source is used to perform super-resolution processing, and the resolution is increased. After increasing the brightness, edge emphasis processing is performed, and then overdrive processing is performed. Therefore, the processing flow in FIG. 4(C) differs from the processing flow in FIG. 1(C) in the following way: This also corresponds to the case where edge enhancement processing is performed. This also corresponds to the case where overdrive processing is performed after the processing flow of

[0161] In this way, by performing super-resolution processing before edge enhancement processing, the resolution can be accurately The image before super-resolution processing has not undergone edge enhancement processing. Therefore, no unnecessary processing is performed, and accurate super-resolution processing can be performed. Alternatively, you can perform overdrive processing after performing super-resolution processing and edge enhancement processing. This allows for faster response and an appropriate amount of overdrive. This allows for a display with less afterimage. As the image changes due to processing, the gradation of each pixel changes. It is possible to change the overdrive processing depending on the amount of super-resolution processing. After the image processing and edge enhancement process, the overdrive process is performed to Since the amount of overdrive can be adjusted to an appropriate level, each pixel can be made to have the optimum gradation. Therefore, the response speed can be increased and overdrive driving can be performed accurately. Furthermore, super-resolution processing makes it possible to display high resolution images without image retention. In addition, edge enhancement processing makes it possible to display images with clear edges. Therefore, to obtain a good quality image, it is necessary to perform the overdrive process before It is important to perform resolution processing and edge enhancement processing. This is not limited to:

[0162] In Figure 4(D), the image signal obtained from the image source is used to perform super-resolution processing, and the resolution is increased. After raising the brightness, contour emphasis processing is performed, and then local dimming processing is performed. Therefore, the process flow in FIG. 4(D) is different from the process flow in FIG. 1(D). 4(D) also corresponds to the case where edge enhancement processing is performed. This also corresponds to the case where local dimming processing is performed after the processing flow of A).

[0163] In this way, by performing super-resolution processing before edge enhancement processing, the resolution can be accurately The image before super-resolution processing has not undergone edge enhancement processing. Therefore, no unnecessary processing is performed, and accurate super-resolution processing can be performed. .

[0164] Alternatively, local dimming is performed after super-resolution processing and edge enhancement processing. When super-resolution processing is performed, new information is added by restoring the information. Therefore, the number of gray levels for each pixel may differ before and after super-resolution processing. Or, there is an area on the screen where the number of pixel gradations changes before and after super-resolution processing. Similarly, the edge enhancement process creates an image in which the edges of objects in the image are emphasized. Therefore, there will be areas on the screen where the number of pixel gradations changes. Therefore, the super-resolution process restores the image information, and the edge enhancement process Therefore, after the image is processed, local dimming is performed to accurately Local dimming processing can be performed, improving contrast. Therefore, to get a good quality image, It is important to perform super-resolution processing and edge enhancement processing before performing local dimming processing. Alternatively, in the local dimming process, the process of determining the brightness of the backlight is It is important to perform super-resolution processing and edge enhancement processing beforehand. In the timing process, the super-resolution process is performed before the process of determining the video signal to be supplied to the pixel. However, in this embodiment, Not limited.

[0165] In Figure 4(E), the image signal obtained from the image source is used to perform super-resolution processing, and the resolution is increased. After increasing the frame frequency, frame interpolation is performed, and after increasing the frame frequency, overdrive is performed. Therefore, the processing flow in FIG. 4(E) is the same as that in FIG. 1(B). ) after the processing flow, or Fig. 4 ( The processing flow of E) is the case where frame interpolation processing is performed on the processing flow of Fig. 1(C). Also equivalent to.

[0166] In this way, by performing super-resolution processing before frame interpolation processing, accurate resolution can be achieved. The image before super-resolution processing is processed by frame interpolation. Therefore, no unnecessary processing is performed, and the super-resolution processing can be performed accurately. can be done.

[0167] Alternatively, after performing super-resolution processing and frame interpolation processing, perform overdrive processing. By doing so, the response speed can be increased and the amount of overdrive can be adjusted to an appropriate level. This allows for a display with less afterimages. As the image changes due to the frame interpolation process, the gradation of each pixel changes. Depending on the amount of change, the overdrive processing can also be changed. Frame interpolation increases the frame frequency, which can lead to overdrive. Therefore, it is possible to change the super-resolution processing and frame interpolation processing. After that, overdrive processing is performed to set the overdrive amount to an appropriate level. Therefore, the response speed can be improved. It is possible to speed up the overdrive and perform overdrive accurately. Resolution processing allows for high-resolution display without image retention. To obtain high-quality images, super-resolution processing and frame rate processing must be performed before overdrive processing. However, the embodiment is not limited to this. .

[0168] In Figure 4(F), the image signal obtained from the image source is used to perform super-resolution processing and increase the resolution. After increasing the frame frequency, frame interpolation processing is performed. After increasing the frame frequency, local dimming is performed. Therefore, the processing flow in FIG. 4(F) is the same as that in FIG. 1(B). This also corresponds to the case where local dimming processing is performed after the processing flow of Figure 4. The processing flow in (F) is the same as the processing flow in (D) of Figure 1, except that frame interpolation processing is performed. It also corresponds to the combination.

[0169] In this way, by performing super-resolution processing before frame interpolation processing, accurate resolution can be achieved. The image before super-resolution processing is processed by frame interpolation. Therefore, no unnecessary processing is performed, and the super-resolution processing can be performed accurately. can be done.

[0170] Alternatively, after performing super-resolution processing and frame interpolation processing, local dimming processing can be performed. When super-resolution processing is performed, new information is added by restoring the information. Therefore, the number of gradations for each pixel may be different before and after super-resolution processing. Or, there may be areas on the screen where the number of pixel gradations changes before and after super-resolution processing. Similarly, a new frame is created by the frame interpolation process, and a new Therefore, there will be areas on the screen where the number of pixel gradations changes. Therefore, the image information is restored by the super-resolution process, and frame interpolation is performed. By performing local dimming after image processing, , and can accurately perform local dimming processing, improving contrast. Therefore, in order to obtain a good quality image, To achieve this, super-resolution processing and frame interpolation processing are performed before local dimming processing. It is also important to determine the brightness of the backlight in local dimming processing. It is important to perform super-resolution processing and frame interpolation processing before performing the processing to determine the quality of the image. Or, in local dimming processing, a process is performed to determine the video signal to be supplied to the pixel. It is important to perform super-resolution processing and frame interpolation processing before Examples of the mode are not limited to these.

[0171] In Figure 5(A), the image signal obtained from the image source is used to perform super-resolution processing, and the resolution is increased. When you increase the brightness, perform local dimming, and then perform overdrive. Therefore, the processing flow of FIG. 5(A) is the same as the processing flow of FIG. 1(C). This also corresponds to the case where local dimming processing is performed on the image. The process flow is equivalent to the case where overdrive processing is performed after the process flow of Figure 1(D). do.

[0172] In this way, it is preferable to perform local dimming processing after performing super-resolution processing. When super-resolution processing is performed, it is as if new information has been added by restoring the information. Therefore, the number of gray levels for each pixel may be different before and after the super-resolution processing. Before and after the super-resolution process, there will be areas on the screen where the number of pixel gradations changes. Therefore, after the image information is restored by the super-resolution process, the local By performing local dimming processing, accurate local dimming processing can be performed. This improves the contrast and allows for accurate image display. Therefore, to obtain a good quality image, it is recommended to perform super-resolution processing before performing local dimming processing. It is also important to adjust the brightness of the backlight in local dimming processing. It is important to perform super-resolution processing before performing processing to determine the local In the saturation processing, the super-resolution processing is performed before the processing that determines the video signal to be supplied to the pixel. However, the embodiment is not limited to this example.

[0173] Or, after super resolution processing and local dimming processing, overdrive processing is performed. By performing this process, the response speed can be increased and the amount of overdrive can be adjusted to an appropriate value. It is possible to reduce the size of the image, resulting in a display with less afterimage. and local dimming processing, the brightness of the image and backlight changes. Since the gradation of each pixel changes, the overdrive processing also changes according to the amount of change. Therefore, after super-resolution processing and local dimming processing, By performing overdrive processing, the amount of overdrive is adjusted to an appropriate level. Therefore, each pixel can be set to the optimum gradation, thereby improving the response speed. This allows for accurate overdrive driving. This allows for high-resolution display without image retention. This processing makes it possible to display high contrast images. To obtain high-quality images, super-resolution processing and local However, the embodiment is not limited to this. I can't.

[0174] In this way, when both local dimming and overdrive processing are performed, As shown in 5(B), after local dimming processing, overdrive processing is performed. However, the embodiment is not limited to this. Before and after each step in the process flow, various other processes can be performed. Examples of various processing include super-resolution processing, edge enhancement processing, frame interpolation processing, and overdrive processing. There are also other processing functions such as EVE processing, local dimming processing, IP conversion processing, and enlargement processing. Processing is also possible.

[0175] Therefore, when overdrive processing is performed in FIG. 4(D), or when In case of C), when local dimming processing is performed, the processing flow shown in FIG. However, the embodiment is not limited to this.

[0176] Alternatively, in FIG. 4(F), when overdrive processing is performed, or in FIG. 4(E), When local dimming is performed in the above, the processing flow shown in FIG. 5(D) is used. However, the embodiment is not limited to this.

[0177] Next, in FIG. 6(A), super-resolution processing is performed using the image signal obtained from the image source. After increasing the image quality, frame interpolation processing is performed, and after increasing the frame frequency, edge enhancement processing is performed. This shows the processing flow when performing overdrive processing after the initial process. An example of the form is not limited to this. Therefore, the processing flow of FIG. 6(A) can be performed in the same manner as FIG. This also corresponds to the case where overdrive processing is performed after the processing flow of A). The processing flow in (A) is the same as the processing flow in (C) of FIG. 4 when frame interpolation processing is performed. Alternatively, the processing flow of FIG. 6(A) corresponds to the processing flow of FIG. 4(E). This also corresponds to the case where edge enhancement processing is performed.

[0178] Similarly, in FIG. 6(B), super-resolution processing is performed using an image signal obtained from an image source. After increasing the resolution, edge enhancement processing is performed, and then frame interpolation processing is performed. This shows the processing flow when overdrive processing is performed after the frequency is increased. The example of the embodiment is not limited to this. Therefore, the processing flow of FIG. 6(B) is the same as that of FIG. This also corresponds to the case where overdrive processing is performed after the processing flow of (B). The processing flow of 6(B) is the same as the processing flow of Fig. 4(C) except that frame interpolation processing is performed. Alternatively, the processing flow of FIG. 6(B) corresponds to the processing flow of FIG. 4(E). This also corresponds to the case where edge enhancement processing is performed.

[0179] As shown in Fig. 6(A) and Fig. 6(B), before edge enhancement processing and frame interpolation processing, By performing super-resolution processing, the resolution can be improved accurately. The image before processing has not undergone edge enhancement or frame interpolation, so it looks Therefore, super-resolution processing can be performed accurately.

[0180] Similarly, as shown in Fig. 6(A) and Fig. 6(B), super-resolution processing, frame interpolation processing, and After performing edge enhancement processing, overdrive processing is performed to improve response speed. It can be made faster, the amount of overdrive can be adjusted appropriately, and there is little afterimage. It is also possible to achieve a clearer display by using super-resolution processing, frame interpolation processing, and edge enhancement. As the image changes due to processing, the gradation of each pixel changes. Depending on the amount, overdrive processing can also be changed. The frame frequency increases due to the overdrive processing, so the overdrive processing also increases accordingly. Therefore, it is possible to perform super-resolution processing, frame interpolation processing, and contour After enhancement processing, overdrive processing is performed to adjust the overdrive amount. Since the size of the pixel can be adjusted appropriately, each pixel can be adjusted to the optimum gradation. This allows the response speed to be increased and overdrive driving to be performed accurately. Furthermore, super-resolution processing makes it possible to display high resolution images without image retention. Therefore, in order to obtain a good quality image, it is necessary to perform super-resolution processing, It is important to perform frame interpolation processing and edge enhancement processing. An example of this is not limited to this.

[0181] Next, in Fig. 6(C), super-resolution processing is performed using the image signal obtained from the image source. After increasing the image quality, frame interpolation processing is performed, and after increasing the frame frequency, edge enhancement processing is performed. This shows the processing flow when the local dimming process is performed after the image processing. The embodiment is not limited to this example. Therefore, the processing flow of FIG. 6(C) is the same as that of FIG. This also corresponds to the case where local dimming processing is performed after the processing flow of (A). The processing flow in FIG. 6(C) performs frame interpolation processing on the processing flow in FIG. 4(D). Alternatively, the processing flow in FIG. 6(C) corresponds to the processing flow in FIG. 4(F). This also corresponds to the case where edge enhancement processing is performed.

[0182] Similarly, in FIG. 6(D), super-resolution processing is performed using an image signal obtained from an image source. After increasing the resolution, edge enhancement processing is performed, and then frame interpolation processing is performed. The following shows the processing flow when local dimming is performed after increasing the frequency. The embodiment is not limited to this. Therefore, the processing flow of FIG. This also applies to the case where local dimming processing is performed after the processing flow of 4(B). The processing flow of FIG. 6(D) performs frame interpolation processing in comparison with the processing flow of FIG. 4(D). Alternatively, the processing flow of FIG. 6(D) corresponds to the processing flow of FIG. 4(F). On the other hand, this also corresponds to the case where edge enhancement processing is performed.

[0183] As shown in Fig. 6(C) and Fig. 6(D), before the edge enhancement process and frame interpolation process, By performing super-resolution processing, the resolution can be improved accurately. The image before processing has not undergone edge enhancement or frame interpolation, so it looks Therefore, super-resolution processing can be performed accurately.

[0184] Similarly, as shown in Fig. 6(C) and Fig. 6(D), super-resolution processing, frame interpolation processing, and It is desirable to perform local dimming after performing edge enhancement processing. When processing is performed, the information is restored, and it appears as if new information has been added. Therefore, the number of gray levels for each pixel may be different before and after super-resolution processing. There will be an area on the screen where the number of pixel gradations changes before and after the frame. Frame interpolation creates new frames and creates new images. , an area where the number of pixel gradations changes exists within the screen. This process creates an image in which the edges of objects in the image are emphasized. Therefore, the area where the tonality changes exists within the image. ,The image information is restored, and the image is processed by frame interpolation. After edge enhancement processing, local dimming processing is performed to accurately By performing cardimming processing, contrast can be improved and accurate images can be obtained. Therefore, to get a good quality image, local dimming is required. Before performing the filtering process, super-resolution processing, frame interpolation processing, and edge enhancement processing can be performed. It is also important to determine the brightness of the backlight in local dimming processing. Before processing, it is important to perform super-resolution processing, frame interpolation processing, and edge enhancement processing. Or, in local dimming processing, it determines the video signal to be supplied to the pixel. Before performing the processing to be performed, super-resolution processing, frame interpolation processing, and edge enhancement processing are performed. However, the embodiment is not limited to these.

[0185] Furthermore, when both local dimming and overdrive processing are performed, the As with B), after local dimming processing, overdrive processing is performed. is preferred.

[0186] Therefore, when overdrive processing is performed in FIG. 6(C), or when In A), when local dimming processing is performed, the processing flow shown in FIG. However, the embodiment is not limited to this.

[0187] Alternatively, in FIG. 6(D), when overdrive processing is performed, or in FIG. 6(B), When local dimming is performed in the above, the processing flow shown in FIG. 7(B) is used. However, the embodiment is not limited to this.

[0188] (Fourth embodiment) Next, a case where a part of the processing flow is modified will be described. It is possible to apply the contents described above.

[0189] FIG. 8(A) shows an example in which a part of FIG. 1(E) or FIG. 4(F) is modified. First, super-resolution processing is performed, and then frame interpolation processing is performed. The brightness of the backlight is controlled during the timing process. The data with a high frame frequency and the data with a low frame frequency are Using the data of the backlight brightness in the area, the local dimming process is performed for each pixel. This performs processing to determine the video signal to be supplied.

[0190] When frame interpolation processing is performed, the image may not change significantly. The pitch of the backlight arrangement is much larger than the pixel pitch. Using the data before frame interpolation processing, the local dimming processing There is no practical problem even if a process for determining the brightness of the backlight is performed.

[0191] By performing the processing shown in FIG. 8(A), frame interpolation processing and local dimming processing are performed. This allows the processing of backlight brightness control to be performed simultaneously, reducing the overall processing time. Therefore, it is possible to shorten the time required for games and other applications that require real-time performance. Even when a display is required, it can be displayed without delay.

[0192] In addition, in FIG. 8(A), edge enhancement processing, overdrive processing, etc. may also be performed. As an example, FIG. 8(B) shows a case where edge enhancement processing is also performed. However, the embodiment is not limited to these.

[0193] Next, FIG. 9 shows an example in which a part of FIG. 1(D) is modified. First, the super-resolution processing At the same time, the brightness of the backlight is controlled by local dimming. Then, the data with high resolution after super-resolution processing and the data with low resolution are processed. The brightness data of the backlight in each area is used for local dimming processing. The video signal to be supplied to each pixel in the image sensor is determined.

[0194] When super-resolution processing is performed, the image may not change significantly. The pitch of the light arrangement is much larger than the pixel pitch. Using the data before image processing, the backlight of each area in local dimming processing is In practice, there is no problem even if a process for determining the brightness of the image is performed.

[0195] By performing the processing shown in Figure 9, the balance between super-resolution processing and local dimming processing is improved. The overall processing time can be reduced because the processing for controlling the brightness of the backlight can be performed simultaneously. Therefore, it is possible to display images that require real-time performance, such as games. Even in this case, the image can be displayed without delay.

[0196] In addition, in Figure 9, edge enhancement processing, overdrive processing, frame interpolation processing, etc. It is possible to do this additionally.

[0197] (Embodiment 5) In this embodiment, an example of a lighting device will be described. It can be used as a light, an interior light, etc. is not limited to this.

[0198] Figure 10 shows a backlight or lighting device using a point light source. As shown in FIG. 10(A), a plurality of point light sources 1002 are arranged in the device 1001. By arranging the point light sources 1002 in a uniform pattern, it is possible to form a uniform surface light source. The device 1001 can be used as a backlight for a liquid crystal display device or as part thereof. It is possible.

[0199] The threshold 1003 is arranged extending in the horizontal direction. , and are arranged extending in the vertical direction. By arranging the light source in this way, the surface light source can be divided into multiple regions. The vertical direction is divided into three regions, and the horizontal direction is divided into nine regions. The threshold reduces light leakage to other areas. By controlling the brightness of 02, local dimming (local brightness control of the backlight, LOCAL DIMMING can be realized. In particular, by placing a threshold, This reduces light leakage into other areas, allowing for precise control of brightness for each area. Therefore, it becomes easy to derive the transmittance of the liquid crystal element of each pixel. However, in one embodiment, This is not limited to this.

[0200] Alternatively, you can turn off some of the light sources and move the unlit parts around the screen. In other words, it is possible to partially turn off the point light source in the screen and It is possible to scan from top to bottom. By performing this type of backlight scanning, afterimages are reduced and video characteristics are improved. It is possible to do this.

[0201] The thresholds are arranged horizontally, such as threshold 1003. It is also possible to place only the thresholds. It is also possible to arrange only those elements that are arranged to extend in the vertical direction, as shown in the figure. It is also possible not to provide a threshold at all.

[0202] The surface of the threshold 1003 or threshold 1004 is mirror-finished or white. However, the embodiment is not limited to this. In the case of a mirror surface, , and can reflect light, so light can be used effectively. It is possible to reduce power consumption. In the case of white light, the light can be diffused. Since the boundaries of the regions become less visible, visibility can be improved.

[0203] The transmittance of the threshold 1003 or the threshold 1004 is 50% or less, preferably 30% or less. % or less. Alternatively, the transmittance of threshold 1003 or threshold 1004 is , 1% or more, preferably 5% or more. However, in one embodiment, However, the present invention is not limited to these. A low transmittance reduces light leakage and allows for the control of brightness for each area. However, if the light is not completely transparent, the boundary of the area will be visible. Therefore, by making the area slightly transparent, The boundary becomes less visible, and visibility can be improved.

[0204] Threshold 1003 or Threshold 1004 is made of acrylic, plastic, polycarbonate However, it is possible to use organic materials such as polyester and PET. An example of this is not limited to this.

[0205] It is also possible to provide a spacer 1005. However, in this embodiment, However, the present invention is not limited to this, and it is also possible to not provide the spacer 1005. A sheet placed on the point light source 1002, the threshold 1003, or the threshold 1004. It has a function to prevent bending.

[0206] When providing spacers 1005, it is recommended not to provide too many of them, but to provide a small number of them. Therefore, for example, in FIG. 10(A), three regions are arranged vertically and four regions are arranged horizontally. The area is divided into nine regions, totaling 27 regions, but the spacers 1005 are provided. It is possible to create areas where the spacers 1005 are provided and areas where they are not. Alternatively, the number of spacers 1005 can be less than the number of regions. In this way, by not providing the spacers 1005 in all regions, manufacturing can be facilitated. and / or costs can be reduced.

[0207] The spacer 1005 is preferably transparent, black, or white. By using black or white, the brightness unevenness can be controlled depending on the presence or absence of the spacer 1005. However, it is possible to reduce the occurrence of color shifts and the like. An example of this is not limited to this.

[0208] The spacer 1005 may be made of acrylic, plastic, polycarbonate, PET, etc. However, the present embodiment is not limited to this. Not determined.

[0209] The point light source 1002 may be, for example, a light emitting diode for three colors or a laser for three colors. Each light-emitting diode or laser emits red, blue, and green light. For example, by using three-color LEDs, it is possible to make it white. Therefore, if you can make it white, you can make it red, blue, It is not limited to green. For example, CMYK such as cyan, magenta, and yellow can be used as a point light source. It is also possible to use

[0210] In this way, if the brightness can be controlled for each color, more precise local dimming can be performed. This makes it possible to reduce power consumption and improve contrast. It becomes Noh.

[0211] It is preferable that the number of light-emitting diodes of each color is the same. The number of light-emitting diodes may be increased for only a certain color. For example, the number of green LEDs can be calculated by multiplying the number of red or blue LEDs. In this way, the number of LEDs can be set to different values ​​for each color. By doing so, it becomes possible to easily adjust the chromaticity. It is also possible to reduce the difference between colors.

[0212] The light-emitting diodes are not limited to three colors. For example, By using LEDs with different wavelengths, the chromaticity can be widened. For example, red, blue In addition to green, it is also possible to add a color close to green, making it a four-color configuration.

[0213] In addition to red, blue, and green light emitting diodes, white light emitting diodes can also be used. By using white LEDs, the life of the LEDs can be extended. Alternatively, by using a white light emitting diode, color change due to temperature can be reduced. It is possible to reduce it.

[0214] Note that only white LEDs are used, and red, blue, green, and other LEDs are not used. It is possible to use no white. By using only white, it is possible to prevent the colors from mixing. Or, by using only white, color deviation due to deterioration can be prevented. This makes it possible to reduce the

[0215] The horizontal pitch 1007 of the point light sources 1002 is the same as the vertical pitch of the point light sources 1002. It is preferable that the length is shorter than 1006. However, the embodiment is not limited to these. I can't.

[0216] It is preferable that the number of regions in the horizontal direction is greater than the number of regions in the vertical direction. For example, in FIG. 10(A), the number of vertical regions is 3, and the number of horizontal regions is 1. is 9.

[0217] The number of areas in one screen is less than the number of LEDs of a certain color. In other words, it is preferable to have multiple point light sources for one color in one area. For a point light source arranged in one area, a certain color Preferably, the luminance of the plurality of point light sources having the above-mentioned characteristics is controlled to be the same at the same time. In other words, it is preferable to control the brightness for each color in one area. For example, if there are three red LEDs in one area, the three LEDs When increasing the brightness, increase the brightness of all three, and when decreasing the brightness, decrease the brightness of all three. However, the characteristics of light-emitting diodes and the like vary. Therefore, it is difficult to achieve the same brightness. It is desirable to make the light emit at the same brightness. For example, it is desirable to make the light emit at the same brightness with a variation of about 30%. It is desirable to have multiple point light sources emit light with the same brightness. By placing the light source in a position that is close to the center of the screen, it is possible to reduce uneven brightness. However, the embodiment is not limited to these.

[0218] FIG. 10(B) shows an example of a part of the cross section of FIG. 10(A). A diffusion plate 1011 is provided. The diffusion plate 1011 reduces unevenness in brightness. The scattering plate 1011 is supported by the spacer 1005 so that it does not sag even at the center of the screen. It is being done.

[0219] A display panel 1012 is disposed on the diffusion plate 1011. The display panel may be, for example, For example, pixels, drive circuits, liquid crystal elements, glass substrates, thin film transistors, polarizers, retardation films, The display panel 1012 has a color filter and / or a prism sheet. By linking it with the Crite, it is possible to achieve appropriate display. .

[0220] The diffusion plate 1011 has the function of diffusing light while transmitting the light. Therefore, it is preferable that the material has a function of diffusing light while having high transmittance. The transmittance of the diffusion plate 1011 is preferably higher than the transmittance of the threshold 1003. The high transmittance of the plate 1011 allows the light reflected by the threshold 1003 to pass through the diffuser plate 101 Therefore, it is possible to reduce the leakage of light into other areas. This allows for more light to be emitted onto the screen, which allows for precise control of the brightness of each area. This will allow for proper local dimming. Examples of the mode are not limited to these.

[0221] The height 1014 of the threshold 1003 is higher than the height 1013 of the point light source 1002. In order to prevent the light emitted from the point light source 1002 from leaking to another area, However, it is desirable that the height 1014 of the threshold 1003 is higher. are not limited to these.

[0222] The distance 1015 between the threshold 1003 and the diffusion plate 1011 is 1 / 4 the height of the threshold 1003. It is preferable that the distance 1015 is shorter than 014. If the distance 1015 is long, too much light will leak. Therefore, the distance 1015 is preferably shorter than the height 1014 of the threshold 1003. However, the embodiment is not limited to these.

[0223] The distance 1015 between the threshold 1003 and the diffuser 1011 is 1 / 2 the height of the point light source 1002. If the interval 1015 is too small, the boundaries of the regions may be too close together. It may be too sharp, and the border may be visible on the screen. To prevent the boundary of the area from being visible on the screen, the length should be long enough to allow some light to leak through. Therefore, the height 1014 of the threshold 1003 is set higher than the height 1013 of the point light source 1002. By making it longer than the conventional method, it is possible to allow an appropriate amount of light to leak out. Examples of the mode are not limited to these.

[0224] The height 1014 of the threshold 1003 and the height of the threshold 1004 are approximately equal. "Approximately equal" means that there are some differences, including manufacturing errors and variations. For example, if the difference is more than 10%, By making the threshold heights approximately equal, Since the amount of light leakage is uniform, it is possible to reduce uneven brightness. Examples of the form are not limited to these.

[0225] Although a point light source is arranged in each region in FIG. 10, this embodiment is not limited to this. It is also possible to place a small surface light source in each area. An example of a surface light source is shown below. When using a surface light source, the same applies as when using a point light source. Therefore, it is possible to configure the content (or a part thereof) described in FIG. (or a part of it) can be applied to FIG.

[0226] In Fig. 11(A), a surface light source 1102 is arranged in each region. This can be achieved using a variety of configurations.

[0227] In FIG. 11(A), the threshold 1003 and the threshold 1004 are not provided. However, the embodiment is not limited to this. It is also possible to arrange only those that are arranged extending in the horizontal direction. It is also possible to arrange only those that are arranged vertically, such as 004. Alternatively, both thresholds may be provided.

[0228] It is also possible to provide a spacer 1005. However, in this embodiment, However, the present invention is not limited to this, and it is also possible to not provide the spacer 1005. It has a function to prevent the sheet placed on the surface light source 1102 from sagging. However, in the case of a surface light source, the area in which a cavity is formed within the region is small, so the spacer 10 It is possible not to set 05.

[0229] The horizontal pitch of the surface light source 1102 is smaller than the vertical pitch of the surface light source 1102. However, the embodiment is not limited to this.

[0230] It is preferable that the height of the threshold is higher than the height of the surface light source 1102. In order to prevent the light emitted from the source 1102 from leaking to another area, the height of the threshold is higher. However, the embodiment is not limited to these.

[0231] Furthermore, when a diffusion plate is provided on the surface light source 1102, the distance between the threshold and the diffusion plate is It is preferable that the interval is longer than the height of 1102. If the interval is too small, the boundaries of the regions may be too close together. It may be too sharp, and the border may be visible on the screen. To prevent the boundary of the area from being visible on the screen, the length should be long enough to allow some light to leak through. Therefore, by making the threshold longer than the height of the surface light source 1102, However, the embodiment is not limited to these. stomach.

[0232] Next, as an example of the surface light source 1102, a light guide plate and a linear light source (or a group of point light sources) are used. A cross-sectional view of a small surface light source is shown in FIG. 11(B). The cross section of a surface light source is shown. Light is incident from a line light source 1103 to a light guide plate 1104. In the light guide plate 1104, the light is repeatedly totally reflected and propagated. The bottom surface 1105 of the light guide plate 1104 is processed. This results in a surface light source.

[0233] Regarding the processing of the bottom surface 1105, for example, when unevenness is formed in a prism shape, In some cases, ink is printed on the surface. By controlling the light intensity, a uniform surface light source can be realized.

[0234] In addition, when a surface light source as shown in FIG. 11(A) is used, a diffusion plate 10 is provided on the surface light source. 11 can be provided. This makes it possible to reduce uneven brightness. However, when using the surface light source 1102, unlike the case of a point light source, the area Since the brightness is uniform within the lens, it is possible to dispense with the diffusion plate 1011.

[0235] Another example of the surface light source 1102 is a flat fluorescent tube (flat cathode tube). do.

[0236] Alternatively, as shown in FIG. 11(C), the fluorescent tube (cathode tube) 1106 is bent and arranged within the area, It is also possible to create a surface light source by making it similar to a flat fluorescent tube (flat cathode tube). In this case, as shown in the cross-sectional view of FIG. 11(D), the area around the fluorescent tube (cathode tube) 1106, especially the upper It is also possible to place a diffusion plate 1107 on the side to approximate a uniform surface light source. However, the embodiment is not limited to these.

[0237] (Sixth embodiment) Next, another example of the configuration of the display device and a method of driving the same will be described. In this case, the display using a display element with a slow response time (long response time) in brightness to signal writing is In this embodiment, a liquid crystal display device having a long response time is used. However, the display element in this embodiment is not limited to this, and may be any other suitable element. A variety of display elements can be used that have a slow response of brightness to writing.

[0238] In the case of a general LCD device, the response of brightness to signal writing is slow, and the signal is not applied to the liquid crystal element. Even if voltage is continuously applied, it takes more than one frame period for the response to be completed. Even if you display a video on such a display device, it is not possible to faithfully reproduce the video. Furthermore, in the case of active matrix driving, the time it takes to write a signal to one liquid crystal element is is usually calculated by dividing the signal writing period (one frame period or one sub-frame period) by the number of scanning lines. The time it takes to select a scan line is only one scan line selection period, and the liquid crystal element cannot respond within this short time. Therefore, most of the response of the liquid crystal element occurs during the period when no signal is written. Here, the dielectric constant of the liquid crystal element changes according to the transmittance of the liquid crystal element. However, the fact that the liquid crystal element responds during the period when no signal is written means that the liquid crystal element The dielectric constant of the liquid crystal element changes when there is no charge exchange with the outside (constant charge state). In other words, in the equation (charge) = (capacity) (voltage), when the charge is constant, The capacitance changes depending on the state of the liquid crystal element. Therefore, the voltage applied to the liquid crystal element is determined by the response of the liquid crystal element. Therefore, the voltage at the time of signal writing will change. When driving a liquid crystal element with a slow brightness response to voltages applied to the liquid crystal element using an active matrix, In principle, the dividing voltage cannot reach the voltage at the time of signal writing.

[0239] The display device of this embodiment responds to the display element to a desired luminance within a signal writing period. In order to achieve this, the signal level when writing the signal must be corrected in advance (correction signal). Furthermore, the response time of the liquid crystal element is The larger the value, the shorter the response time. Therefore, by writing a correction signal, the response time of the liquid crystal element can be shortened. This type of driving method that adds a correction signal is also called overdrive. In the overdrive of this embodiment, the signal writing period is set to be equal to the period input to the display device. Even if the period of the image signal to be written is shorter than the period of the input image signal (input image signal period Tin), By correcting the signal level according to the period, the display element can be made to have the desired brightness within the signal writing period. The signal writing period is shorter than the input image signal period Tin. For example, an original image is divided into multiple sub-images, and the multiple sub-images are combined into one frame. For example, the images may be displayed sequentially within a frame period.

[0240] Next, the signal level at the time of signal writing in the active matrix drive display device is corrected. An example of a method for doing this will be described with reference to Figures 12(A) and 12(B). , the horizontal axis represents time, the vertical axis represents the signal level at the time of signal writing, and the signal FIG. 12(B) is a graph showing a schematic representation of the change in luminance of the signal level over time during writing. The horizontal axis is time and the vertical axis is the display level. In addition, when the display element is a liquid crystal element, The signal level can be the voltage, and the display level can be the transmittance of the liquid crystal element. The vertical axis of FIG. 12(A) represents voltage, and the vertical axis of FIG. 12(B) represents transmittance. In the embodiment, the overdrive is performed when the signal level is other than the voltage (duty ratio, current Incidentally, the overdrive in this embodiment also includes the case where the display level is This also includes cases other than transmittance (brightness, current, etc.). Normally black type (e.g. VA mode, IPS mode, etc.) where the display is black when the voltage is 0 There are also normally white types (e.g. TN mode, OCB mode, etc.) that display white when However, the graph shown in Figure 12(B) corresponds to both types, and in the case of a normally black type In the case of a normally white type, the transmittance increases as you move up the graph. The transmittance may be increased toward the bottom of the rough. The liquid crystal mode may be a normally black type or a normally white type. The timing of signal writing is shown by a dotted line on the time axis. The period until the next signal writing is performed is called a retention period Fi. In Figure 1, i is an integer that represents the index of each retention period. In 2(A) and (B), i is shown as 0 to 2, but i may be any other value. (Integers other than 0 to 2 are not shown.) , the transmittance that realizes the brightness corresponding to the image signal is Ti, and the transmittance Ti in the steady state is The voltage to be applied is Vi. The dashed line 5101 in FIG. 12(A) indicates the overdrive. The solid line 5102 represents the time change of the voltage applied to the liquid crystal element when the liquid crystal display device is not operated. 10 shows the change over time in voltage applied to the liquid crystal element when overdriving is performed in the above example. Similarly, the dashed line 5103 in FIG. 12(B) represents the liquid crystal element when overdrive is not performed. The solid line 5104 represents the time change in transmittance of the light emitting diode 101 when the overdrive in this embodiment is used. The graph shows the time change in the transmittance of the liquid crystal element when the hold period Fi is The difference between the desired transmittance Ti and the actual transmittance is expressed as an error αi.

[0241] In the graph shown in FIG. 12(A), the dashed line 5101 and the solid line 5102 are The desired voltage V0 is applied to both 0 and 2, and the graph shown in FIG. It is assumed that the desired transmittance T0 is obtained for both the line 5103 and the solid line 5104. If overdrive is not performed, as shown by the dashed line 5101, In this case, the desired voltage V1 is applied to the liquid crystal element, but as already mentioned, The time is extremely short compared to the retention period, and most of the retention period is in a constant charge state. During the hold period, the voltage applied to the liquid crystal element changes with the change in transmittance. At the end of the interval F1, the voltage becomes significantly different from the desired voltage V1. The dashed line 5103 in the graph shown in FIG. 12(B) also differs significantly from the desired transmittance T1. As a result, it is not possible to display the image faithfully to the image signal, resulting in low image quality. On the other hand, when the overdrive of this embodiment is performed, the solid line 51 As shown in FIG. 02, at the beginning of the hold period F1, a voltage V1 greater than the desired voltage V1 is applied. In other words, the liquid crystal element is gradually charged with the charge carrier during the hold period F1. In anticipation of this change in voltage, the voltage applied to the liquid crystal element is adjusted at the end of the hold period F1. At the beginning of the hold period F1, the desired voltage V is set to a voltage close to the desired voltage V1. By applying the voltage V1' corrected from 1 to the liquid crystal element, the desired voltage V1 can be accurately applied to the liquid crystal element. In this case, the solid line 510 in the graph shown in FIG. As shown in FIG. 4, the desired transmittance T1 is obtained at the end of the holding period F1. That is, Although the charge state is constant for most of the retention period, Next, in the hold period F2, the desired voltage V2 is V1. In this case, as in the case of the retention period F1, At the end of the hold period F2, the voltage applied to the liquid crystal element is gradually changed. At the beginning of the hold period F2, the voltage applied to the liquid crystal element is set to a voltage close to the desired voltage V2. In this case, a voltage F2' corrected from the desired voltage V2 is applied to the liquid crystal element. As a result, as shown by the solid line 5104 in the graph of FIG. 12(B), At the end of the period, the desired transmittance T2 is obtained. If it is larger than 1, the corrected voltage Vi' will be larger than the desired voltage Vi. Furthermore, it is preferable to correct the hold period F2 so that Vi is compared with Vi-1. If all voltages are smaller, the corrected voltage Vi' will be smaller than the desired voltage Vi. It is preferable that the correction value is determined in advance based on the response characteristics of the liquid crystal element. The method of implementing it in the device is to formulate a correction formula. and incorporate the correction values ​​into the logic circuit. and reads out the correction value as needed.

[0242] In addition, when the overdrive in this embodiment is actually realized as a device, There are various constraints. For example, voltage compensation must be within the rated voltage range of the source driver. That is, the desired voltage is originally large, and the ideal correction If the voltage exceeds the rated voltage of the source driver, it will not be possible to correct it completely. The problems in such a case will be explained with reference to Figures 12(C) and 12(D). In (C), the horizontal axis is time and the vertical axis is voltage, just like in Figure 12(A), and the 12(D) is a graph showing a schematic representation of the change in voltage over time as a solid line 5105. As in FIG. 12(B), the horizontal axis represents time and the vertical axis represents transmittance, and the The graph shows a schematic representation of the time change in transmittance as a solid line 5106. The notation method is the same as in Figures 12(A) and (B), so the explanation will be omitted. 2(C) and (D) are corrections to achieve the desired transmittance T1 during the hold period F1. Since the voltage V1' exceeds the rated voltage of the source driver, we have no choice but to set V1' = V1. This indicates a state in which the signal is no longer stable and sufficient correction cannot be performed. The transmittance obtained by the measurement will be a value that differs from the desired transmittance T1 by an error α1. The difference α1 is large only when the desired voltage is originally large, so the error α The degradation of image quality caused by the occurrence of 1 is often within the acceptable range. As the voltage becomes larger, the error in the voltage correction algorithm also becomes larger. Therefore, in the voltage correction algorithm, the desired transmittance is obtained at the end of the hold period. If this assumption is made, the error α1 will be small even though it is actually large. Since the voltage is corrected as a result of the voltage being held, an error may be included in the correction in the next holding period F2. As a result, the error α2 also becomes large. Furthermore, if the error α2 becomes large, If the error is too large, the next error α3 will become even larger, and so on. As a result, the image quality deteriorates significantly. In the bar drive, the error is prevented from increasing in a chain reaction. Therefore, when the correction voltage Vi' exceeds the rated voltage of the source driver during the hold period Fi, The error αi at the end of the retention period Fi is estimated, and the retention time is calculated by taking into account the magnitude of the error αi. The correction voltage in the period Fi+1 can be adjusted. By doing so, the error αi becomes large. Even if the error is small, the effect on the error αi+1 can be minimized. This can prevent the overdrive voltage from increasing in a chain reaction. An example of minimizing the error α2 will be explained with reference to FIGS. 12(E) and 12(F). The graph shown in FIG. 12(E) is a graph showing the correction voltage V2' of the graph shown in FIG. 12(C). The time change of the voltage when the correction voltage is V2'' is further adjusted is shown as solid line 5107. The graph shown in FIG. 12(F) shows that the voltage is corrected by the graph shown in FIG. 12(E). The solid line in the graph shown in FIG. In 5106, over-correction occurs due to the correction voltage V2', but as shown in FIG. The solid line 5108 in the graph shows the result of the correction voltage V2' adjusted to take into account the error α1. This prevents overcorrection and minimizes the error α2. The response characteristics of the liquid crystal element can be measured in advance. The methods are to formulate a correction formula and incorporate it into the logic circuit, and to use a lookup table to calculate the correction value. This can be done by storing the correction value in memory as a These methods are added separately from the part that calculates the correction voltage Vi', can be incorporated into the part that calculates the correction voltage Vi'. The correction amount of the adjusted correction voltage Vi' (the difference from the desired voltage Vi) is It is preferable that |Vi´´-Vi|<|Vi´-Vi| It is preferable to set the following.

[0243] Note that the error α The shorter the signal writing period, the larger i becomes. The response time of the crystal element must also be shortened, resulting in a larger compensation voltage. Furthermore, the required compensation voltage is increased, resulting in the compensation voltage being applied to the source driver. The frequency with which the rated voltage of the battery is exceeded also increases, and the frequency with which a large error αi occurs also increases. Therefore, the overdrive in this embodiment is effective when the signal writing period is short. Specifically, we divide an original image into multiple sub-images, When the multiple sub-images are displayed sequentially within one frame period, the image is A motion included in the plurality of images is detected, an intermediate image of the plurality of images is generated, and a motion between the plurality of images is generated. When the signal is inserted into the frame and driven (so-called motion compensated double speed drive), or when these are combined, In the case where a driving method such as the above is performed, the overdrive of this embodiment is used. This will have a significant effect.

[0244] In addition to the upper limit mentioned above, the rated voltage of the source driver also has a lower limit. For example, There are cases where a voltage smaller than 0 cannot be applied. In this case, the upper limit case mentioned above As in the case of However, even in this case, as in the above-mentioned method, at the end of the retention period Fi, The error αi in the holding period Fi+1 is estimated and the magnitude of the error αi is taken into consideration. The positive voltage can be adjusted. Note that the rated voltage of the source driver is set to a value less than 0. If a small voltage (negative voltage) can be applied, a negative voltage is applied to the liquid crystal element as a correction voltage. By doing so, the holding period F can be adjusted to take into account the potential fluctuations due to the constant charge state. At the end of i, the voltage applied to the liquid crystal element can be adjusted to a voltage close to the desired voltage Vi. Cut.

[0245] To prevent deterioration of the liquid crystal element, the polarity of the voltage applied to the liquid crystal element is periodically reversed. In this case, so-called inversion driving can be performed in combination with overdriving. That is, the overdrive in this embodiment may be performed simultaneously with the inversion drive. For example, when the signal writing period is half the input image signal period Tin, the polarity is If the inversion period and the input image signal period Tin are approximately the same, a positive polarity signal is written. The negative polarity signal is written alternately every two times. By making the rotation period longer than the signal writing period, the frequency of pixel charging and discharging can be reduced. However, if the polarity reversal period is too long, the polarity The difference in brightness due to the difference in polarity may be perceived as flicker, The inversion period is preferably equal to or shorter than the input image signal period Tin.

[0246] (Embodiment 7) Next, another example of the configuration of the display device and a method of driving the same will be described. In this case, an image that interpolates the movement of an image (input image) input from outside the display device is generated by multiple The image generated inside the display device is based on the input image, and the generated image (generated image) and the input image are The generated image is displayed sequentially based on the movement of the input image. By using interpolated images, the movement of the video can be made smoother, and This can improve the problem of video quality being reduced by afterimages caused by hard drive. Interpolation is explained below. Ideally, a moving image should be displayed by adjusting the brightness of each pixel in real time. This is achieved by controlling the pixel in real time, but the real-time individual control of the pixel is The problem of the huge number of circuits, the problem of wiring space, and the large amount of input image data Therefore, it is difficult to realize the above method. The display is made to look like a moving image by displaying multiple still images in sequence at a regular interval. This period (called the input image signal period in this embodiment, Tin ) is standardized, for example, 1 / 60 seconds in the NTSC standard and 1 / 60 seconds in the PAL standard. Even with this period, the impulse type display device, CRT, There were no problems with the video display. However, the hold-type display device did not meet these standards. If you display a video that conforms to the standard as is, it may be displayed with afterimages due to the fact that it is a hold type. This causes a problem called hold blur, which makes the display unclear. The blur is caused by the inconsistency between the interpolation of unconscious movements by the human eye and the hold-type display. Since it is recognized by discrepancy, it is easier to recognize the input image than the conventional standard. This can be reduced by shortening the signal period (approaching real-time individual control of pixels). However, shortening the input image signal cycle will require changes to the standard and will also increase the amount of data. However, it is difficult to do this based on a standardized input image signal. An image that interpolates the movement of the input image is generated inside the display device, and the generated image By interpolating the input image and displaying it, holes can be displayed without changing the standard or increasing the amount of data. In this way, the image signal is generated inside the display device based on the input image signal. The process of interpolating the motion of the input image by creating a moving image is called video interpolation.

[0247] The moving image interpolation method according to this embodiment can reduce moving image blur. The moving image interpolation method in this embodiment can be divided into an image generation method and an image display method. And specific patterns of motion can be imaged using different image generation methods and / or image displays. By using this method, it is possible to effectively reduce motion blur. 10A and 10B are schematic diagrams illustrating an example of a moving image interpolation method according to the present embodiment. In Figures 13(A) and (B), the horizontal axis represents time, and the horizontal position determines the time. The part marked "Input" indicates the timing at which each image is handled. Here, the timing at which the signal is input is shown as two temporally adjacent images. , we focus on images 5121 and 5122. The input images are input at intervals of a period Tin. The length of one period Tin is referred to as one frame or one frame period. The part marked "Generation" indicates that a new image is generated from the input image signal. Here, the image is generated based on the image 5121 and the image 5122. The generated image, image 5123, is the focus. The part marked "display" indicates the image displayed on the display device. This shows the timing when the image is displayed. Although the image is only indicated by a dashed line, by treating it in the same way as the image of interest, An example of a method for interpolating moving images in the form of:

[0248] An example of a moving image interpolation method in this embodiment is shown in FIG. A generated image generated based on two input images that are adjacent to each other is generated based on the two input images. By displaying the video in the gap between the two images, it is possible to interpolate the video. In this case, it is preferable that the display period of the display image is set to 1 / 2 of the input period of the input image. However, the display period is not limited to this, and various display periods can be used. For example, the display period can be set to the input period. By setting the display period to less than half the normal period, you can display the video more smoothly. By making it longer than half of the power cycle, power consumption can be reduced. The image is generated based on two adjacent input images, but the number of input images is limited to two. The number is not limited to a specific number and may vary. For example, three (or more than three) time-adjacent If you generate an image based on an input image (which is also good), it will be easier to generate an image based on two input images. In this case, a generated image with high accuracy can be obtained. The same time as the input timing of the image 5122, that is, the display timing relative to the input timing. is delayed by one frame, but the display time in the video interpolation method of this embodiment The timing is not limited to this, and various display timings can be used. You can delay the display timing by one frame or more. This allows the display timing of the generated image 5123 to be delayed, so the image This allows for ample time for generating 5123, reducing power consumption and manufacturing costs. If the display timing is too slow relative to the input timing, The input image is stored for a longer period of time, which increases the memory capacity required for storage. The display timing relative to the input timing is about 1 to 2 frames behind. preferable.

[0249] Here, the specific image 5123 generated based on the image 5121 and the image 5122 is In order to interpolate a moving image, it is necessary to detect the motion of the input image. However, in this embodiment, a block matrix is ​​used to detect the motion of the input image. However, there are various methods that can be used without being limited to this. methods (methods that take the difference between image data, methods that use Fourier transform, etc.) can be used. In the block matching method, first, the image data of one input image (here, The image data of the image 5121 is stored in a data storage means (a semiconductor memory, a storage circuit such as a RAM, etc.) Then, the image in the next frame (image 5122 in this example) is stored in a plurality of The divided areas are rectangular and of the same shape, as shown in Figure 13(A). However, it is not limited to this, and various things (shape or size can be changed depending on the image) Then, for each divided area, the data is stored in the data storage means. The data is compared with the image data of the previous frame (here, image data of image 5121). In the example of FIG. 13(A), the image 5122 is A region in image 5121 whose data is similar to region 5124 in the image is searched for, and region 51 26 is searched. When searching in image 5121, the search range is In the example of FIG. 13(A), the search range is preferably limited to an area 512. The area 5125 is set to be about four times the area of ​​the area 4. By making it larger than this, it is possible to improve the detection accuracy even in fast-moving videos. However, if the search is too broad, the search time will be enormous, and the detection of movement will be difficult. Therefore, the area of ​​the region 5125 is set to be about two to six times larger than the area of ​​the region 5124. Then, the searched area 5126 and the image 5122 are compared. The difference in position from the area 5124 is calculated as a motion vector 5127. 27 represents the movement of image data in the area 5124 during one frame period. To generate an image that shows the intermediate state of the motion, the direction of the motion vector is kept the same, but the size is changed. A vector 5128 for generating an image is created by changing the vector 5128, and the vector 5128 is included in the region 5126 in the image 5121. The image data to be generated is moved according to the image generation vector 5128, thereby generating the image 512. This series of processes is called image 51. By performing this for all regions in 22, an image 5123 is generated. By sequentially displaying image 5121, image 5123, and image 5122, a video can be interpolated. Note that the position of the object 5130 in the image is different in the image 5121 and the image 5122. Although different (i.e., moving), the generated image 5123 is similar to the images 5121 and This is the midpoint of the object in image 5122. By displaying such an image, This makes it possible to make the movement of the image smoother and improves the blurring of moving images due to afterimages and the like.

[0250] The size of the image generation vector 5128 is determined according to the display timing of the image 5123. In the example of FIG. 13(A), the display timing of the image 5123 is The timing is set to the midpoint (1 / 2) of the display timing of image 5121 and image 5122. Therefore, the size of the image generation vector 5128 is set to half the size of the motion vector 5127. ,For example, if the display timing is 1 / 3, the size is set to 1 / 3 and the display If the timing is 2 / 3, the size can be set to 2 / 3.

[0251] In this way, multiple regions with various motion vectors can be moved to create new When creating an image, it is important to note that there may be overlaps within the destination area where other areas have already been moved, and that There may be some blank areas that are not moved from the area. The method for correcting the overlapping part is, for example, to correct the overlapping data. The method of taking the average of the motion vectors, etc., is to assign priority to the data with the highest priority. The method of using the data in the generated image, color (or brightness) is prioritized, but brightness ( For example, the average of the color (or color) can be used. The image data at the position of the image 5121 or 5122 is directly used in the generated image. the method of converting the image data into the image data, the average of the image data at the position of the image 5121 or the image 5122 Then, the generated image 5123 is generated by the image generation By displaying the image at a timing according to the size of the vector 5128, the movement of the video becomes smooth. Furthermore, the quality of the video may be reduced due to image retention caused by hold driving. The problem can be improved.

[0252] Another example of the moving image interpolation method according to the present embodiment is a time interpolation method as shown in FIG. 13(B). A generated image generated based on two adjacent input images is called a generated image. When displaying images in the gaps between the times they are displayed, each image can be further divided into multiple sub-images. By dividing the image into multiple images and displaying them, it is possible to interpolate the moving image. In addition to the benefits of a shorter period, dark images are periodically displayed (the display method is In other words, the image display period is Compared to simply making the input period half the length, the blurring of the video due to afterimages etc. is reduced. In the example of FIG. 13(B), the "input" and "generation" are Since the same processing as in the example of FIG. 13(A) can be performed, the explanation will be omitted. In this example, "display" refers to dividing one input image and / or generated image into multiple sub-images. Specifically, as shown in FIG. 13(B), image 5121 By dividing the image into sub-images 5121a and 5121b and displaying them sequentially, the image is The image 5121 is perceived as being displayed, and the image 5123 is perceived as being displayed as sub-images 5123a and 5123b. By dividing the image into 23b and displaying them sequentially, the human eye perceives it as if an image 5123 is being displayed. The image 5122 is divided into sub-images 5122a and 5122b and displayed sequentially. This allows the human eye to perceive the image 5122 as being displayed. The perceived image is the same as the example in Figure 13(A), but the display method is impulse Since the image can be made closer to the original, blurring of moving images due to afterimages and the like can be further improved. Although the number of divided sub-images is two in FIG. 13(B), it is not limited to this and may be various. The number of divisions can be varied. The timing at which the sub-image is displayed is as shown in Figure 13 ( In B), the intervals are equal (1 / 2), but there are various display timings without being limited to this. For example, dark sub-images (5121b, 5122b, 5123b) can be used. By speeding up the display timing (specifically, from 1 / 4 to 1 / 2), The display method can be made closer to the impulse type, so blurred moving images caused by afterimages etc. can be reduced. Further improvement can be achieved by delaying the timing of the dark sub-image (specifically, 1 By switching the timing from 1 / 2 to 3 / 4, the period during which a bright image is displayed can be extended. This allows for improved display efficiency and reduced power consumption.

[0253] Another example of the moving image interpolation method according to the present embodiment is to detect the shape of an object moving in an image. This is an example of processing differently depending on the shape of the moving object. indicates the timing of display, similar to the example in Figure 13(B), but the displayed content is , and moving text (also called scrolling text, subtitles, tickers, etc.) Note that "input" and "generation" may be the same as in Figure 13(B). The blurring of moving images during hold driving is due to the nature of the moving object. This is especially noticeable when the characters are moving. This is because when reading moving text, your eyes inevitably follow the text, This is because hold blurring is likely to occur. Furthermore, characters should have clear outlines. This can further accentuate the blur caused by the hold blur. That is, it determines whether an object moving in the image is a character, and if so, performs further special processing. This is effective for reducing hold blur. Contour detection and / or pattern detection are performed on the object to determine whether the object is a character. If it is determined that the sub-images are too large, motion interpolation is performed even if they are sub-images divided from the same image. , the intermediate state of the movement can be displayed to make the movement smooth. If it is determined that it is not a character, it is divided into two parts from the same image, as shown in Figure 13(B). If you use a sub-image, you can display the moving object without changing its position. In this example, the area 5131 determined to be a character is moving upward. However, the position of the region 5131 is different between the image 5121a and the image 5121b. The same applies to the images 5123a and 5123b, and the images 5122a and 5122b. This allows you to see the normal motion of moving characters, which are particularly susceptible to hold blur. It can make the movement even smoother than the compensated double speed drive, so it can reduce the image distortion caused by afterimages. The clarity can be further improved.

[0254] (Embodiment 8) In this embodiment, a pixel configuration and pixel operation applicable to a liquid crystal display device will be described. In this embodiment, the liquid crystal element is operated in a TN (Twisted Wave) mode. ted Nematic mode, IPS (In-Plane-Switching) mode Mode, FFS (Fringe Field Switching) mode, MVA (Mu lti-domain Vertical Alignment) mode, PVA(Pa Interconnected Vertical Alignment mode, ASM (Axial ly Symmetric aligned Micro-cell) mode, OCB( Optically Compensated Birefringence mode, FLC (Ferroelectric Liquid Crystal) mode, AFL C (Antiferroelectric Liquid Crystal) It is possible.

[0255] FIG. 14A is a diagram showing an example of a pixel configuration that can be applied to a liquid crystal display device. The pixel 80 includes a transistor 5081 , a liquid crystal element 5082 , and a capacitor element 5083 . The gate of the transistor 5081 is electrically connected to a wiring 5085. The first terminal of the transistor 81 is electrically connected to the wiring 5084. The second terminal of the liquid crystal element 5082 is electrically connected to the first terminal of the liquid crystal element 5082. The first terminal of the capacitor 5083 is electrically connected to the first terminal of the liquid crystal element 5082. The second terminal of the capacitor 5083 is electrically connected to the wiring 5086. The first terminal of a transistor is either the source or the drain. The second terminal of the transistor is the other of the source and drain. , if the first terminal of the transistor is the source, the second terminal of the transistor is the drain Similarly, if the first terminal of the transistor is the drain, then the second terminal of the transistor is The child is the source.

[0256] The wiring 5084 can function as a signal line. The signal line is a line through which an input is received from the outside of the pixel. The wiring 5085 is a wiring for transmitting the signal voltage to the pixel 5080. The scan line controls the on / off of the transistor 5081. The wiring 5086 can function as a capacitance line. This is the wiring for applying a predetermined voltage to the second terminal of the transistor 5083. The capacitor 5083 functions as a storage capacitor. The storage capacitor is a capacitor that prevents the signal voltage from reaching the liquid crystal element even when the switch is off. The wiring 5087 is a capacitor element for keeping the voltage applied to the counter electrode 5082. The counter electrode can apply a predetermined voltage to the second terminal of the liquid crystal element 5082. The functions that each wiring can have are not limited to these. For example, by changing the voltage applied to the capacitance line, The voltage applied to the liquid crystal element can be adjusted by the transistor 5081. Since it only needs to function as a switch, the polarity of the transistor 5081 may be a P-channel type. Alternatively, an N-channel type may be used.

[0257] FIG. 14(B) is a diagram showing an example of a pixel configuration that can be applied to a liquid crystal display device. In the pixel configuration example shown in FIG. 14B, the wiring 5087 is omitted compared to the pixel configuration example shown in FIG. 14A. The second terminal of the liquid crystal element 5082 and the second terminal of the capacitor element 5083 are electrically The pixel configuration is the same as that shown in FIG. 14(A), except that the connection points are different. The pixel configuration example shown in FIG. 14(B) is particularly suitable for liquid crystal elements in a lateral electric field mode (I This is applicable when the liquid crystal element is horizontal (including PS mode and FFS mode). In the electric field mode, the second terminal of the liquid crystal element 5082 and the second terminal of the capacitor element 5083 Since the second terminal of the liquid crystal element 5082 and the capacitor element This is because it is easy to electrically connect the second terminal of 5083. By using the pixel configuration shown in FIG. 1, the wiring 5087 can be omitted, and the manufacturing process can be simplified. This allows for a reduction in manufacturing costs.

[0258] The pixel configuration shown in FIG. 14(A) or FIG. 14(B) is arranged in a matrix. In this way, a display section of a liquid crystal display device is formed, and various images can be displayed. FIG. 14C shows a case where a plurality of the pixel configurations shown in FIG. 14A are arranged in a matrix. 14C is a diagram showing a circuit configuration when a display unit is enabled. The figure shows four pixels extracted from the multiple pixels. ,j is a natural number), the pixel located at the pixel 5080_i,j is denoted as pixel 5080_i, j, the wiring 5084_i, the wiring 5085_j, and the wiring 5086_j are electrically connected to each other. Similarly, for the pixel 5080_i+1,j, a wiring 5084_i+1 and a wiring 5084_i+2 are connected. Similarly, the pixel 5080_i is electrically connected to the line 5085_j and the wiring 5086_j. For j+1, wiring 5084_i, wiring 5085_j+1, wiring 5086_j+1, Similarly, for pixel 5080_i+1,j+1, the wiring 5084 _i+1, wiring 5085_j+1, and wiring 5086_j+1 are electrically connected. Each wiring can be shared by multiple pixels belonging to the same column or row. In the pixel configuration shown in FIG. 14(C), the wiring 5087 is a counter electrode. Since it is common to all pixels, the wiring 5087 is represented by the natural number i or j. In the example of the embodiment, the pixel configuration shown in FIG. Therefore, even in the configuration in which the wiring 5087 is shown, the wiring 50 87 is not essential and can be omitted by sharing it with other wiring, etc.

[0259] The pixel configuration shown in Figure 14(C) can be driven in a variety of ways. The LCD is driven by a method called AC driving, which causes deterioration of the LCD element (burn-in). FIG. 14(D) shows a case where dot inversion driving, which is one of AC driving methods, is performed. When the timing of the voltage applied to each wiring in the pixel configuration shown in FIG. 14(C) is 1 is a diagram showing a dot inversion driving method and a dot inversion driving method. This can suppress the flicker that is visible when the display is turned on.

[0260] In the pixel configuration shown in FIG. 14C, The switch in the element is in the selected state (on) during the j-th gate selection period in one frame period. In the other periods, it is in the non-selected state (off state). After the selection period, the j+1th gate selection period is provided. In this way, sequential scanning is performed. By this, all the pixels are sequentially selected within one frame period. In the timing chart, when the voltage is in a high state (high level), the The switch is in the selected state, and when the voltage is low (low level), it is in the unselected state. This is the case when the transistor in each pixel is an N-channel type, and when it is a P-channel type, When a diode-type transistor is used, the relationship between the voltage and the selected state is the same as that for an N-channel transistor. is the opposite.

[0261] In the timing chart shown in FIG. 14(D), the first pulse in the k-th frame (k is a natural number) During the j gate selection period, a positive signal voltage is applied to the wiring 5084_i used as a signal line. A negative signal voltage is applied to the wiring 5084_i+1. In the j+1-th gate selection period, a negative signal voltage is applied to the wiring 5084_i, and the wiring A positive signal voltage is applied to 5084_i+1. After that, each signal line Signals with inverted polarity are added alternately for each selection period. As a result, in the kth frame, In other words, a positive signal voltage is applied to the pixel 5080_i,j, and a negative signal voltage is applied to the pixel 5080_i+1,j. voltage, a negative signal voltage for pixel 5080_i,j+1, and a negative signal voltage for pixel 5080_i+1,j+1. A positive signal voltage is added to each of them. Then, in the k+1th frame, , in each pixel, a signal voltage of the opposite polarity to that written in the kth frame is written. As a result, in the k+1th frame, the pixel 5080_i, j has a negative signal voltage, pixel 5080_i+1, j has a positive signal voltage, pixel 5080_i, j+1 is a positive signal voltage, and the pixels 5080_i+1, j+1 are a negative signal voltage. In this way, adjacent pixels in the same frame have different A signal voltage of the same polarity is applied to each pixel, and a signal voltage of the same polarity is applied to each pixel for each frame. The driving method in which the polarity of the liquid crystal display is reversed is called dot inversion driving. The present invention aims to suppress deterioration of the liquid crystal element while preventing the image from being visually recognized when the entire or part of the displayed image is uniform. It is possible to reduce flicker caused by the wiring 5086_j and the wiring 5086_j+1. The voltage applied to all the wirings 5086 including the wirings 5086 can be set to a constant voltage. The timing chart for the wiring 5084 only shows the polarity of the signal voltage. In reality, various signal voltage values ​​can be used for the polarity shown. The polarity is inverted for each pixel (one pixel) in the description above, but the present invention is not limited to this. For example, the polarity of the signal voltage written every two gate selection periods can be reversed. By reversing the polarity of the signal, the power consumption required to write the signal voltage can be reduced. In addition, it is possible to invert the polarity for each column (source line inversion) or for each row. It is also possible to invert the polarity of each signal (gate line inversion).

[0262] The second terminal of the capacitor 5083 in the pixel 5080 receives a current of 100 V for one frame period. Here, in addition to the wiring 5085 used as the scanning line, The voltage applied is low for most of the frame period, and a nearly constant voltage is applied. Therefore, the second terminal of the capacitor element 5083 in the pixel 5080 is connected to the wiring 5085. FIG. 14(E) is a diagram showing an example of a pixel configuration that can be applied to a liquid crystal display device. The pixel configuration shown in FIG. 14(E) has a different layout from the pixel configuration shown in FIG. 14(C). The line 5086 is omitted, and the second terminal of the capacitance element 5083 in the pixel 5080 and the The wiring 5085 in the row is electrically connected to the wiring 5085 in the row. In the range shown in FIG. 14(E), the pixel 5080_i,j+1 and the pixel The second terminal of the capacitance element 5083 in the element 5080_i+1,j+1 is connected to the wiring 5085_j In this way, the second terminal of the capacitor element 5083 in the pixel 5080 is electrically connected to By electrically connecting the wiring 5085 in the previous row, the wiring 5086 can be omitted. Since the second terminal of the capacitor 5083 can be The connection destination is not only the wire 5085 in the previous row, but also the wire 5085 in another row. The driving method of the pixel configuration shown in FIG. 14(E) is the same as that of the pixel configuration shown in FIG. 14(C). The same driving method can be used.

[0263] Note that the capacitor 5083 and the wiring electrically connected to the second terminal of the capacitor 5083 By using this, it is possible to reduce the voltage applied to the wiring 5084 used as a signal line. The pixel configuration and driving method in this case will be explained using FIG. 14(F) and FIG. 14(G). The pixel configuration shown in FIG. 14(F) has a wiring configuration different from that shown in FIG. 14(A). 5086 are provided in two per pixel column, and the first capacitor element 5083 in the pixel 5080 The feature of this method is that the electrical connection to the two terminals is made alternately between adjacent pixels. The two wires 5086 are referred to as wire 5086-1 and wire 5086-2, respectively. Specifically, in the range shown in FIG. 14(F), the pixel 5080_i , j, the second terminal of the capacitance element 5083 is electrically connected to the wiring 5086-1_j. The second terminal of the capacitor 5083 in the pixel 5080_i+1,j is connected to the wiring 5086-2 _j, and the second terminal of the capacitance element 5083 in the pixel 5080_i,j+1 The pixel is electrically connected to the wiring 5086-2_j+1 and is connected to the pixel 5080_i+1,j+1. A second terminal of the capacitor 5083 in the .

[0264] For example, as shown in FIG. 14(G), pixel 5080_i , j, the wiring 5086-1_j is connected to the j-th gate selection During the jth gate selection period, it is set to low level, and after the jth gate selection period ends, it is changed to high level. Then, it maintains a high level for one frame period, and in the k+1th frame After a signal voltage of negative polarity is written in the j-th gate selection period, it is changed to a low level. In this way, after a signal voltage of positive polarity is written to the pixel, the first By changing the voltage of the wiring electrically connected to the two terminals in the positive direction, The voltage applied to the pixel can be changed by a predetermined amount in the positive direction. The power consumption required for signal writing can be reduced because the signal voltage can be reduced. In addition, when a signal voltage of negative polarity is written in the j-th gate selection period, In this case, after a signal voltage of negative polarity is written to the pixel, a voltage is applied to the second terminal of the capacitor element 5083. By changing the voltage of the wiring electrically connected to the liquid crystal element in the negative direction, the voltage applied to the liquid crystal element can be changed by a predetermined amount in the negative direction, so that the pixel That is, the signal voltage written to the second terminal of the capacitor 5083 can be reduced. The electrically connected wiring is connected to the same row of the same frame, and a signal voltage of positive polarity is applied. The pixels to which a negative signal voltage is applied have different wirings. In FIG. 14(F), a signal voltage of positive polarity is written in the k-th frame. A wiring 5086-1 is electrically connected to the pixel, and a signal of negative polarity is output in the k-th frame. In this example, a wiring 5086-2 is electrically connected to a pixel to which a voltage is written. This is just one example, and for example, there are pixels to which a signal voltage of positive polarity is written and pixels to which a signal voltage of negative polarity is written. In the case of a driving method in which a pixel to which a voltage is written appears every two pixels, the wiring 5086-1 and The electrical connection of the wiring 5086-2 is also made alternately every two pixels. Furthermore, when signal voltages of the same polarity are written to all pixels in one row ( In this case, one wiring 5086 is sufficient per row. Therefore, even in the pixel configuration shown in FIG. 14(C), it is possible to use FIG. 14(F) and FIG. 14(G). As explained above, a driving method for reducing the signal voltage written to the pixel can be used.

[0265] Next, the liquid crystal element is a vertical alignment (VA) liquid crystal display, typically an MVA mode or a PVA mode. A pixel configuration and a driving method that are particularly preferable for the VA mode will be described. The card does not require a rubbing process during manufacturing, has little light leakage when displaying black, and has low driving voltage. Although it has excellent features, the image quality deteriorates when the screen is viewed from an angle (narrow viewing angle). ) To widen the viewing angle in the VA mode, As shown in FIG. 5(B), a pixel configuration is provided in which one pixel has multiple sub-pixels. In the pixel configuration shown in FIG. 15(A) and FIG. 15(B), the pixel 5080 This shows an example of a case where two subpixels (subpixel 5080-1 and subpixel 5080-2) are included. The number of sub-pixels in one pixel is not limited to two, and various numbers of sub-pixels can be used. The larger the number of sub-pixels, the wider the viewing angle can be. Several sub-pixels can have the same circuit configuration. In this case, all the sub-pixels have the same circuit configuration as shown in FIG. The circuit configuration will be described as being the same as that shown in (A). 5081-1, a liquid crystal element 5082-1, and a capacitor element 5083-1. The connections between the components are in accordance with the circuit configuration shown in FIG. The second subpixel 5080-2 includes a transistor 5081-2, a liquid crystal element 5082-2, a capacitor The connection relationship between the elements is the same as the circuit configuration shown in FIG. 14(A). The same applies to the establishment of the new system.

[0266] The pixel configuration shown in FIG. 15(A) has two sub-pixels that make up one pixel, each of which is connected as a scanning line. There are two wires 5085 (wire 5085-1 and wire 5085-2) used as signal lines. 5084 is used as a capacitor line, and one wiring 5086 is used as a capacitor line. In this way, by sharing the signal line and the capacitance line between two sub-pixels, The aperture ratio can be improved, and further, the signal line driving circuit can be simplified. This reduces manufacturing costs and the number of connections between the LCD panel and the driver circuit IC. The pixel configuration shown in FIG. 15(B) is made up of two For each subpixel, there is one wiring 5085 used as a scanning line, and one wiring 5086 used as a signal line. The wiring 5084 has two wirings (wiring 5084-1 and wiring 5084-2) and is used as a capacitance line. In this way, the scanning line and the capacitance line are divided into two sub lines. By sharing it among pixels, the aperture ratio can be improved, and the total number of scanning lines can be reduced. This reduces the time required to select each gate line, even on high-resolution LCD panels. This allows the time to be increased to write an appropriate signal voltage to each pixel.

[0267] 15(C) and 15(D) show the pixel configuration shown in FIG. 15(B) in which the liquid crystal element is replaced with the shape of the pixel electrode, and the electrical connection state of each element is shown in schematic form. In FIG. 15(C) and FIG. 15(D), the electrode 5088-1 represents the first pixel electrode. 15C, the electrode 5088-2 represents the second pixel electrode. The electrode 5088-1 corresponds to the first terminal of the liquid crystal element 5082-1 ​​in FIG. 15(B). The second pixel electrode 5088-2 corresponds to the first terminal of the liquid crystal element 5082-2 in FIG. 15(B). That is, the first pixel electrode 5088-1 corresponds to the source of the transistor 5081-1. The second pixel electrode 5088-2 is electrically connected to either the source or drain of the transistor. On the other hand, the source or drain of the capacitor 5081-2 is electrically connected to the ) the connection relationship between the pixel electrode and the transistor is reversed. 5088-1 is electrically connected to either the source or the drain of the transistor 5081-2. The second pixel electrode 5088-2 is connected to the source or drain of the transistor 5081-1. It shall be electrically connected to one of the terminals.

[0268] The pixel configurations shown in FIG. 15(C) and FIG. 15(D) are alternately arranged in a matrix. By placing the pixel in this position, a special effect can be obtained. An example of this is shown in FIG. 15(E) and FIG. 15(F). The pixel configuration shown in FIG. 15(E) is The part corresponding to the pixel 5080_i,j and the pixel 5080_i+1,j+1 is shown in FIG. The pixel 5080_i+1,j and the pixel 5080_i,j+1 are configured as shown in The part shown in FIG. 15(D) is configured as shown in FIG. 15(F). When driven as shown in the timing chart, in the jth gate selection period of the kth frame, , the first pixel electrode of the pixel 5080_i,j and the second pixel electrode of the pixel 5080_i+1,j A signal voltage of positive polarity is written to the second pixel electrode of the pixel 5080_i,j and the pixel 5 A signal voltage of negative polarity is written to the first pixel electrode of 080_i+1,j. In the j+1-th gate selection period of the frame, the second pixel electrode of the pixel 5080_i,j+1 A signal voltage of positive polarity is written to the first pixel electrode of the pixel 5080_i+1,j+1. , the first pixel electrode of the pixel 5080_i,j+1 and the second pixel electrode of the pixel 5080_i+1,j+1 A negative signal voltage is written to the pixel electrode. In the (k+1)th frame, In this way, the polarity of the signal voltage is inverted in the pixel configuration including the sub-pixels. While realizing a drive equivalent to dot inversion drive, the polarity of the voltage applied to the signal line is changed by one flip. Since the power consumption required for writing the signal voltage to the pixel can be made the same within the frame period, The power consumption can be significantly reduced. The voltage applied to all of the wiring 5086 can be a constant voltage.

[0269] Furthermore, the pixel configuration and driving method shown in Figs. 15(G) and 15(H) , the magnitude of the signal voltage written to the pixel can be reduced. The capacitance lines electrically connected to the plurality of sub-pixels of a pixel are made different for each sub-pixel. That is, the pixel configuration and the driving method thereof shown in FIG. 15(G) and FIG. 15(H) Therefore, for sub-pixels to which the same polarity is written in the same frame, Sub-pixels that share a common dose line and have different polarities written in the same frame are written with the same The capacitance lines are different within each row. Then, when writing to each row is completed, The voltage of the line is changed in the positive direction for the sub-pixels to which a positive signal voltage is written, and in the negative direction for the sub-pixels to which a negative signal voltage is written. By changing the signal voltage written to the pixel in the negative direction, Specifically, the wiring 5086 used as the capacitance line can be reduced in size. There are two lines in the row (line 5086-1 and line 5086-2), and the first pixel of pixel 5080_i,j The electrode and the wiring 5086-1_j are electrically connected via a capacitance element, and the pixel 508 The second pixel electrode of 0_i,j and the wiring 5086-2_j are electrically connected via a capacitance element. The first pixel electrode of the pixel 5080_i+1,j and the wiring 5086-2_j are connected to each other by a capacitor. The second pixel electrode of the pixel 5080_i+1,j is electrically connected to the wiring 50 86-1_j is electrically connected to the first pixel of the pixel 5080_i,j+1 through a capacitance element. The pixel electrode and the wiring 5086-2_j+1 are electrically connected via a capacitance element. The second pixel electrode of the pixel 5080_i,j+1 and the wiring 5086-1_j+1 form a capacitance element. The first pixel electrode of the pixel 5080_i+1,j+1 is electrically connected to the wiring 508 6-1_j+1 are electrically connected to the pixel 5080_i+1,j+ The second pixel electrode of the pixel 1 is electrically connected to the wiring 5086-2_j+1 through a capacitor. However, this is just an example. For example, if a pixel is written with a positive signal voltage and a pixel is written with a negative signal voltage, In the case of a driving method in which every two pixels are written with a signal voltage of the polarity, The electrical connections of 5086-1 and wiring 5086-2 are also changed alternately every two pixels. Furthermore, it is preferable that signal voltages of the same polarity are written to all pixels in one row. In some cases, the gate line is inverted (gate line inversion), but in that case, the wiring 5086 is 1 per row. That is, even in the pixel configuration shown in FIG. 15(E), the same applies to the pixel configurations shown in FIGS. 15(G) and 15(G). As explained using (H), a driving method that reduces the signal voltage written to the pixel is used. It is possible.

[0270] (Embodiment 9) In this embodiment, an example of a display device will be described.

[0271] First, an example of a system block of a liquid crystal display device will be described with reference to FIG. 16(A). The liquid crystal display device includes a circuit 5361, a circuit 5362, a circuit 5363_1, a circuit 5363_2, a circuit 5363_3, a circuit 5363_4, a circuit 5363_5, a circuit 5363_6, a circuit 5363_7, a circuit 5363_8, a circuit 5363_9, a circuit 5363_10, a circuit 5 _2, a pixel portion 5364, a circuit 5365, and a lighting device 5366. In the circuit 5362, a plurality of wirings 5371 are arranged extending from the circuit 5362, and a plurality of wirings 5372 are arranged The circuit 5363_1 and the circuit 5363_2 are arranged to extend from each other. At the intersections of the wiring 5371 and the plurality of wirings 5372, display elements such as liquid crystal elements are provided. Pixels 5367 having the same structure are arranged in a matrix.

[0272] The circuit 5361 is connected to a circuit 5362, a circuit 5363_1, a circuit 5363_2, a circuit 5363_3, a circuit 5363_4, a circuit 5363_5, a circuit 5363_6, a circuit 5363_7, a circuit 5363_8, a circuit 5363_9, a circuit 5363_10, a circuit 5363_ 5363_2 and the circuit 5365, and has a function of supplying a signal, a voltage, a current, or the like to the Controller, control circuit, timing generator, power supply circuit, regulator, etc. In this embodiment, as an example, the circuit 5361 can function as a circuit 5362, the start signal for the signal line driver circuit (SSP), the clock signal for the signal line driver circuit (SCK), inverted clock signal for signal line driver circuit (SCKB), data for video signal (D ATA) and a latch signal (LAT). As a result, a start signal for the scanning line driver circuit ( GSP), the clock signal for the scanning line driver circuit (GCK), and the inverted clock signal for the scanning line driver circuit Alternatively, the circuit 5361 may supply a clock signal (GCKB) to the circuit 5365. It shall provide a backlight control signal (BLC), but is not limited to this. The circuit 5361 also connects various other signals, various voltages, or various currents to the circuit 5362, It can be supplied to the circuit 5363_1, the circuit 5363_2, and the circuit 5365.

[0273] In addition, the circuit 5361 performs super-resolution processing, edge enhancement processing, frame interpolation processing, over Drive processing, local dimming processing, IP conversion processing, and / or enlargement processing It is possible to do this.

[0274] Note that the circuit 5365 can perform local dimming processing and the like. Alternatively, in the circuit 5365, the backlight of each area in the local dimming process It is possible to carry out a process to determine the brightness of the image.

[0275] Note that various processes can be performed in the circuit 5361 or the circuit 5365. Therefore, the circuit 5361 or the circuit 5365 may be composed of many more circuits. That is, the circuit 5361 or the circuit 5365 may be configured with multiple circuits. In this case, the circuits included in the circuit 5361 or the circuit 5365 are However, in one embodiment, the above-described configuration may be implemented on a single IC chip. It is possible to place the signal on multiple IC chips. In this case, the circuit 5361 or the circuit 5365 is configured using multiple IC chips.

[0276] The circuit 5362 receives signals (e.g., SSP, SCK, SCK) supplied from the circuit 5361. B, DATA, LAT) to output video signals to multiple wirings 5371. The circuit 5363_1 and the circuit 5363_2 can function as a signal line driver circuit. 63_2 responds to signals (GSP, GCK, GCKB) supplied from the circuit 5361, It has a function of outputting scan signals to a plurality of wirings 5372 and functions as a scan line driver circuit. The circuit 5365 responds to the signal (BLC) supplied from the circuit 5361. By controlling the amount of power or time supplied to the lighting device 5366, the lighting device It has a function to control the brightness (or average brightness) of the device 5366 and functions as a power supply circuit. is possible.

[0277] When video signals are input to the multiple wirings 5371, the multiple wirings 5371 are The wirings 5 ​​can function as signal lines, video signal lines, source lines, etc. When a scanning signal is input to the wiring 5372, the wiring 5372 is a signal line, a scanning line, or a gate line. However, the embodiment is not limited to this. do not have.

[0278] The same signal is input from the circuit 5361 to the circuit 5363_1 and the circuit 5363_2. In this case, the circuit 5363_1 outputs scan signals to the plurality of wirings 5372 and the circuit 536 The timing of the scanning signals output from the 3_2 to the multiple wirings 5372 is roughly the same. Therefore, the loads driven by the circuit 5363_1 and the circuit 5363_2 are reduced. Therefore, the display device can be enlarged. Alternatively, the circuits 5363_1 and 5363_2 can be provided with high definition. Since the channel width of the transistor can be reduced, a display device with a narrow frame can be obtained. However, the present invention is not limited to this, and the circuit 5361 can be implemented by a circuit 5363_1 and a circuit 5363_2. 63_2 and 63_3.

[0279] Note that one of the circuit 5363_1 and the circuit 5363_2 can be omitted.

[0280] In addition, in the pixel portion 5364, wiring such as a capacitance line, a power supply line, and a scanning line is newly arranged. The circuit 5361 can output a signal or a voltage to these wirings. Alternatively, a circuit similar to the circuit 5363_1 or the circuit 5363_2 may be newly created. This newly added circuit outputs signals such as scanning signals to the newly added wiring. It is possible to do this.

[0281] It is to be noted that the pixel 5367 can have a light-emitting element such as an EL element as a display element. In this case, as shown in FIG. 16(B), the display element can emit light, so the circuit 5365 and the lighting device 5366 can be omitted. In order to supply power, a plurality of wirings 5373 that can function as power supply lines are connected to the pixel section 5 The circuit 5361 can be arranged in 364. The circuit 5361 generates a power supply voltage (ANO) The wiring 5373 can be connected to each color element of the pixel. It can be connected to all pixels in common.

[0282] Note that in FIG. 16B, as an example, the circuit 5361 is divided into a circuit 5363_1 and a circuit 5363_2. 53_2 is a scanning line driver circuit. start signal (GSP1), clock signal (GCK1) for the scanning line driving circuit, and Signals such as an inverted clock signal for the driving circuit (GCKB1) are supplied to the circuit 5363_1. The circuit 5361 outputs a start signal (GSP2) for the scanning line driving circuit, clock signal (GCK2) for the scanning line driver circuit, and an inverted clock signal (GCKB2) for the scanning line driver circuit. In this case, the circuit 5363_1 is connected to a plurality of wirings 5 372, and the circuit 5363_2 scans only the odd-numbered wirings of the wirings 5372. Therefore, only the wirings in the even rows can be scanned. Since the driving frequency of the circuit 5363_2 can be reduced, the power consumption can be reduced. Alternatively, the area in which one stage of flip-flops can be laid out can be increased. Therefore, the display device can be made high-definition. However, the present invention is not limited to this. As in FIG. 16A, the circuit 5361 can be , it is possible to output the same signal to the circuit 5363_1 and the circuit 5363_2.

[0283] 16B, the circuit 5361 in FIG. 16A is the same as the circuit 536 It is possible to supply separate signals to the circuit 5363_1 and the circuit 5363_2.

[0284] An example of the system block of the display device has been described above.

[0285] Next, an example of the configuration of the display device will be described with reference to FIGS. 17(A), (B), (C), (D), and Please refer to (E) for further explanation.

[0286] In FIG. 17A, a circuit (for example, a circuit 5362, a circuit 5363_1, and a circuit 5363_2, etc.) are formed on the same base as the pixel portion 5364. The circuit 5361 is formed on a substrate separate from the pixel portion 5364. This reduces the number of external components, thereby reducing costs. Since the number of signals or voltages input to the board 5380 is reduced, the board 5380 and the external components Therefore, the number of connections can be reduced, which improves reliability and yield. can be done.

[0287] When the circuit is formed on a substrate different from the pixel portion 5364, the substrate is a TAB (T ape Automated Bonding method to bond FPC (Flexible Printed Circuit) It can be mounted on a printed circuit board. The pixel part 5364 is mounted on the same substrate 53 by the COG (Chip on Glass) method. It is possible to implement it in 80.

[0288] When the circuit is formed on a substrate different from the pixel portion 5364, the substrate is preferably made of a single crystal semiconductor. Therefore, it is possible to form a transistor using a conductor. The circuit has advantages such as improved drive frequency, improved drive voltage, and reduced output signal variation. You can get a .

[0289] A signal, voltage, or current is input from an external circuit via an input terminal 5381. This is often the case.

[0290] In FIG. 17B, circuits with low drive frequencies (for example, circuit 5363_1, circuit 5363 _2) is formed on the same substrate 5380 as the pixel portion 5364. The pixel portion 5364 and the circuit 5362 are formed on a different substrate. The small transistors make it possible to configure circuits formed on the substrate 5380. Therefore, the semiconductor layer of the transistor may be a non-single-crystal semiconductor, a microcrystalline semiconductor, an organic semiconductor, Therefore, it is possible to increase the size of the display device and to process the display device. This can reduce the number of components, reduce costs, or improve yields.

[0291] As shown in FIG. 17C, a part of the circuit 5362 (circuit 5362a) is connected to the pixel section 5 The remaining circuit 5362 (circuit 5362b) is formed on the same substrate 5380 as the pixel circuit 364. The circuit 5362a can be formed on a different substrate from the circuit 5364. Circuits that can be configured using transistors (e.g., shift registers, selectors, In addition, the circuit 5362b has high mobility and good characteristics. It is preferable to configure a circuit (for example, a shift register) using transistors with small fluctuations. In many cases, they have a built-in amplifier (e.g., a clock, a latch circuit, a buffer circuit, a DA conversion circuit, an AD conversion circuit, etc.) By doing so, as in FIG. 17(B), a non- A single crystal semiconductor, a microcrystalline semiconductor, an organic semiconductor, an oxide semiconductor, or the like can be used. This also reduces the number of external components.

[0292] In FIG. 17D, a circuit (for example, a circuit 5362, circuit 5363_1, and circuit 5363_2, etc.), and a circuit for controlling these circuits. A circuit having this function (for example, the circuit 5361) is formed on a substrate different from that of the pixel portion 5364. This makes it possible to form the pixel section and its peripheral circuits on separate substrates. This makes it possible to improve the yield.

[0293] 17(D), the circuits 5363_1, The circuit 5363_2 can be formed on a substrate different from that of the pixel portion 5364.

[0294] In FIG. 17E, a part of the circuit 5361 (circuit 5361a) is formed on the same substrate as the pixel portion 5364. The remaining circuit 5361 (circuit 5361b) is formed on the plate 5380, and is separate from the pixel portion 5364. The circuit 5361a is formed on a substrate. The circuit 5361a is formed by a transistor with low mobility. When the device has a circuit that can The circuit 5361b uses transistors with high mobility and small variations. A circuit (for example, a shift register, a timing generator, A clock generator often includes a clock generator, an oscillator, a regulator, or an analog buffer.

[0295] 17(A) to 17(D), the circuit 5361a is mounted on the same substrate as the pixel section 5364. The pixel portion 5364 can be formed on a substrate other than the substrate on which the circuit 5361b is formed.

[0296] (Embodiment 10) In this embodiment, examples of the structure of a transistor are shown in FIGS. Please refer to C) for explanation.

[0297] FIG. 18A shows an example of the structure of a top-gate transistor. 18C is an example of the structure of a bottom-gate transistor. 1 is an example of a structure of a transistor manufactured using the above method.

[0298] FIG. 18(A) shows a substrate 5260 and an insulating layer 5261 formed on the substrate 5260. , formed on the insulating layer 5261, and regions 5262a, 5262b, 5262c, A semiconductor layer 5262 having regions 5262d and 5262e, and a semiconductor layer 5262 covering the semiconductor layer 5262 The insulating layer 5263 is formed as follows: a conductive layer 5264 formed on the insulating layer 5263 and the conductive layer 5264 and having an opening; and a conductive layer 5265 formed on the insulating layer 5265 and in the opening of the insulating layer 5265. a conductive layer 5266 and a dielectric layer 5267 formed on the conductive layer 5266 and on the insulating layer 5265 and having an opening; and an insulating layer 5267 formed on the insulating layer 5267 and in the opening of the insulating layer 5267. a layer 5268, and a conductive layer 5269 formed on the insulating layer 5267 and on the conductive layer 5268, the conductive layer 5269 having an opening. An insulating layer 5269 and a light-emitting layer formed on the insulating layer 5269 and in the opening of the insulating layer 5269 5270, and a conductive layer 5271 formed on the insulating layer 5269 and on the light-emitting layer 5270. Shows.

[0299] FIG. 18B shows a substrate 5300 and a conductive layer 5301 formed on the substrate 5300. 5302 formed to cover the conductive layer 5301; A semiconductor layer 5303a formed on the semiconductor layer 5302 and a A semiconductor layer 5303b and a conductive layer formed on the semiconductor layer 5303b and on the insulating layer 5302. a conductive layer 5304, and a conductive layer 5305 formed on the insulating layer 5302 and the conductive layer 5304 and having an opening. an insulating layer 5305 formed on the insulating layer 5305 and in the opening of the insulating layer 5305; layer 5306 and a liquid crystal layer 5307 disposed on the insulating layer 5305 and on the conductive layer 5306. 53, and a conductive layer 5308 formed on the liquid crystal layer 5307.

[0300] FIG. 18C shows a semiconductor substrate 5352 having a region 5353 and a region 5355, An insulating layer 5356 formed on the conductive substrate 5352 and a an insulating layer 5354 formed on the insulating layer 5356; a conductive layer 5357 formed on the insulating layer 5356; 54, an insulating layer 5356, and a conductive layer 5357. The insulating layer 5356 has an opening. 58, a conductive layer 5359 formed on the insulating layer 5358 and in the opening of the insulating layer 5358, In this way, transistors are formed in the regions 5350 and 5351. .

[0301] The insulating layer 5261 can function as a base film. The insulating layer 5263 and the insulating layer 5302 function as an isolation layer (for example, a field oxide film). The insulating layer 5356 can function as a gate insulating film. The conductive layer 5301 and the conductive layer 5357 can function as gate electrodes. The layer 5265, the insulating layer 5267, the insulating layer 5305, and the insulating layer 5358 are interlayer films or flat films. The conductive layer 5266, the conductive layer 5304, and the conductive layer 5359 can function as a wiring, an electrode of a transistor, an electrode of a capacitor, or the like. The conductive layer 5268 and the conductive layer 5306 can be used as a pixel electrode, a reflective electrode, or the like. The insulating layer 5269 can function as a partition wall. The conductive layer 5271 and the conductive layer 5308 function as a counter electrode, a common electrode, or the like. It is possible.

[0302] Examples of the substrate 5260 and the substrate 5300 include a glass substrate, a quartz substrate, and a silicon substrate. Examples of the substrate include a plate, a metal substrate, a stainless steel substrate, and a flexible substrate. , barium borosilicate glass, aluminoborosilicate glass, etc. Examples of flexible substrates Examples include polyethylene terephthalate (PET), polyethylene naphthalate (PEN) ), plastics such as polyethersulfone (PES), or acrylic Flexible synthetic resins are also used. ester, vinyl, polyvinyl fluoride, polyvinyl chloride, etc.), paper containing fibrous materials, substrates Films (polyester, polyamide, inorganic vapor deposition film, paper, etc.) are available.

[0303] The semiconductor substrate 5352 is, for example, a single crystal Si substrate having n-type or p-type conductivity. However, it is not limited to this, and a substrate similar to the substrate 5260 can be used. The region 5353 can be formed by, for example, adding impurities to a semiconductor substrate 5352. For example, if the semiconductor substrate 5352 is a p-type When the region 5353 has a conductivity type, it has n-type conductivity and functions as an n-well. On the other hand, when the semiconductor substrate 5352 has an n-type conductivity, the region 5353 has a p-type conductivity. The region 5355 has, for example, a region where impurities are not introduced into the semiconductor substrate 5 352 and functions as a source region or a drain region. The conductive substrate 5352 may have an LDD region formed therein.

[0304] An example of the insulating layer 5261 is silicon oxide (SiO x ), silicon nitride (SiN x ), oxidation Silicon nitride (SiO x N y ) (x>y), silicon oxynitride (SiN x O y )(x>y) The insulating layer 5261 is a two-layer structure. As an example of the structure, a silicon nitride film is provided as the first insulating film, and a silicon nitride film is provided as the second insulating film. A silicon oxide film can be provided as the insulating film. For example, a silicon oxide film is provided as the first insulating film, and a silicon dioxide film is provided as the second insulating film. It is possible to provide a silicon nitride film as the second insulating film and a silicon oxide film as the third insulating film.

[0305] Examples of the semiconductor layer 5262, the semiconductor layer 5303a, and the semiconductor layer 5303b include non- Single crystal semiconductors (amorphous silicon, polycrystalline silicon, microcrystalline silicon, etc.) ), single crystal semiconductor, compound semiconductor or oxide semiconductor (ZnO, InGaZnO, Si Ge, GaAs, IZO, ITO, SnO), organic semiconductors, or carbon nanotubes There are some.

[0306] For example, the region 5262a is an intrinsic semiconductor layer 5262 to which no impurities are added. However, if a small amount of impurity is added to the region 5262a, it functions as a channel region. The impurity added to the region 5262a can be added to the region 5262b. The concentration of the impurity added to the region 5262c, the region 5262d, or the region 5262e is lower than that of the impurity added to the region 5262c, the region 5262d, or the region 5262e. The regions 5262b and 5262d are preferably doped with impurities at low concentrations. This region is called the LDD (Lightly Doped Drain) region. However, the area 5262b and the area 5262d can be omitted. The regions 5262c and 5262e are regions in which impurities are added to the semiconductor layer 5262 at high concentrations. It functions as a source region or a drain region.

[0307] The semiconductor layer 5303b is a semiconductor layer to which phosphorus or the like is added as an impurity element. , has n-type conductivity.

[0308] When an oxide semiconductor or a compound semiconductor is used as the semiconductor layer 5303a, In this case, the semiconductor layer 5303b can be omitted.

[0309] An example of the insulating layer 5263, the insulating layer 5302, and the insulating layer 5356 is silicon oxide (S iO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y )(x>y), oxynitride Silicon (SiN x O y ) (x>y) or a laminate thereof There are structures, etc.

[0310] Conductive layer 5264, conductive layer 5266, conductive layer 5268, conductive layer 5271, conductive layer 5301 , conductive layer 5304, conductive layer 5306, conductive layer 5308, conductive layer 5357, and conductive layer 53 An example of the conductive film 59 is a conductive film having a single layer structure or a laminated structure thereof. Examples of these include aluminum (Al), tantalum (Ta), titanium (Ti), and molybdenum (Mo). Mo, Tungsten (W), Neodymium (Nd), Chromium (Cr), Nickel (Ni ), platinum (Pt), gold (Au), silver (Ag), copper (Cu), manganese (Mn), cobalt (Co), niobium (Nb), silicon (Si), iron (Fe), palladium (Pd), carbon (C), scandium (Sc), zinc (Zn), phosphorus (P), boron (B), arsenic (As ), gallium (Ga), indium (In), tin (Sn), and oxygen (O) A film of a single element selected from the group consisting of: Examples of the compound include one or more compounds selected from the above group. Alloys containing several elements (indium tin oxide (ITO), indium zinc oxide (IZO) , indium tin oxide with silicon oxide (ITSO), zinc oxide (ZnO), tin oxide (Sn O), cadmium tin oxide (CTO), aluminum neodymium (Al-Nd), magnesium silver ( Mg-Ag), Molybdenum Niobium (Mo-Nb), Molybdenum Tungsten (Mo-W) , molybdenum-tantalum (Mo-Ta) alloy materials, one or more selected from the above group is a compound of multiple elements and nitrogen (nitrides such as titanium nitride, tantalum nitride, molybdenum nitride, etc. film), or a compound of silicon with one or more elements selected from the above group (tungsten Stensilicide, titanium silicide, nickel silicide, aluminum silicon, molybdenum Other examples include carbon nanotubes, organic nanoparticles, and silicon silicide films. Nanotube materials include nanotubes, inorganic nanotubes, or metallic nanotubes.

[0311] Silicon (Si) can be doped with n-type impurities (such as phosphorus) or p-type impurities (such as boron). It is possible to include:

[0312] When copper is used as the conductive layer, it is recommended to use a laminated structure to improve adhesion. It is preferable that:

[0313] The conductive layer in contact with the oxide semiconductor or silicon may be formed of molybdenum or titanium. It is preferable to use

[0314] In addition, by using an alloy material of neodymium and aluminum as the conductive layer, Minium is less likely to cause hillocks.

[0315] When a semiconductor material such as silicon is used as the conductive layer, The material can be formed simultaneously with the semiconductor layer of the transistor.

[0316] In addition, ITO, IZO, ITSO, ZnO, Si, SnO, CTO, or carbon nano Since the tube has light-transmitting properties, these materials can be used as the pixel electrode, the counter electrode, or the common electrode. It can be used for light transmitting parts such as electrodes.

[0317] In addition, by using a low resistance material (such as aluminum) to form a laminated structure, The resistance of the wiring can be reduced.

[0318] In addition, if a low heat-resistant material (such as aluminum) is used instead of a high heat-resistant material (such as molybdenum), By using a laminated structure sandwiching low heat resistant materials (such as titanium, neodymium, etc.), This makes it possible to take advantage of the advantages of the material while improving the heat resistance of wiring, electrodes, etc.

[0319] In addition, materials that react with other materials and change their properties are treated as those that are less likely to react with those other materials. It can be sandwiched or covered with materials, for example, ITO and aluminum. When connecting the ITO and aluminum, neodymium alloy, titanium, molybdenum For example, when connecting silicon and aluminum, can sandwich neodymium alloy, titanium, or molybdenum between silicon and aluminum. These materials can be used for wiring, electrodes, conductive layers, conductive films, terminals, vias, plugs, etc. It can also be used for the following purposes:

[0320] The insulating layer 5265, the insulating layer 5267, the insulating layer 5269, the insulating layer 5305, and the insulating layer 53 An example of the insulating film 58 is a single-layer insulating film or a laminated structure of these insulating films. An example of this is silicon oxide (SiO x ), silicon nitride (SiN x ), or silicon oxynitride (SiO x N y ) (x>y), silicon oxynitride (SiN x O y ) (x>y) etc. The film contains nitrogen, the film contains carbon such as DLC (diamond-like carbon), or white Xanthane resin, epoxy, polyimide, polyamide, polyvinylphenol, benzocyclo Examples include organic materials such as butene and acrylic.

[0321] An example of the light-emitting layer 5270 is an organic EL element or an inorganic EL element. An example of an L element is a hole injection layer made of a hole injection material, a hole transport layer made of a hole transport material, and a light-emitting layer made of a light-emitting material; an electron transport layer made of an electron transport material; or a single layer structure of a layer made of a mixture of two or more of these materials. Or a laminated structure of these.

[0322] Examples of the liquid crystal layer 5307 include nematic liquid crystal, cholesteric liquid crystal, and smectic liquid crystal. Liquid crystal, discotic liquid crystal, thermotropic liquid crystal, lyotropic liquid crystal, low molecular weight liquid crystal, Polymer liquid crystal, polymer dispersed liquid crystal (PDLC), ferroelectric liquid crystal, antiferroelectric liquid crystal, main chain liquid crystal, Examples include side-chain polymer liquid crystals, plasma-addressed liquid crystals (PALCs), and banana-shaped liquid crystals. The liquid crystal driving method is Twisted Nematic (TN). mode, STN (Super Twisted Nematic) mode, IPS (In- Plane-Switching mode, FFS (Fringe Field Switching) mode tching) mode, MVA (Multi-domain Vertical Alignment gnment) mode, PVA(Patterned Vertical Alignm) ent) mode, ASV (Advanced Super View) mode, ASM ( Axially Symmetrically aligned Micro-cell) mode , OCB (Optically Compensated Birefringence) ) mode, ECB (Electrically Controlled Birefringence ngence) mode, FLC (Ferroelectric Liquid Crystal tal) mode, AFLC(AntiFerroelectric Liquid Cr systal mode, PDLC (Polymer Dispersed Liquid Crystal Crystal mode, guest host mode, Blue Phase mode Examples include:

[0323] Note that an insulating layer functioning as an alignment film is provided over the insulating layer 5305 and the conductive layer 5306. It is possible to form an insulating layer or the like that functions as a protrusion.

[0324] Note that a color filter, a black matrix, or a protrusion is provided on the conductive layer 5308. An insulating layer or the like that functions as a conductive layer can be formed under the conductive layer 5308. It is possible to form an insulating layer that functions as a barrier layer.

[0325] In the cross-sectional structure of FIG. 18A, the insulating layer 5269, the light-emitting layer 5270, and the conductive layer 5271 are The layer 5271 is omitted, and the liquid crystal layer 5307 and the conductive layer 5308 shown in FIG. 18(B) are replaced with the insulating layer 52 67 and on the conductive layer 5268.

[0326] In the cross-sectional structure of FIG. 18(B), the liquid crystal layer 5307 and the conductive layer 5308 are omitted. The insulating layer 5269, the light-emitting layer 5270, and the conductive layer 5271 shown in FIG. 18(A) are formed on the insulating layer 53. 5305 and the conductive layer 5306.

[0327] In the cross-sectional structure of FIG. 18C, the following is provided over the insulating layer 5358 and the conductive layer 5359: By forming an insulating layer 5269, a light-emitting layer 5270, and a conductive layer 5271 shown in FIG. Alternatively, the liquid crystal layer 5307 and the conductive layer 5308 shown in FIG. It can be formed on layer 5267 and on conductive layer 5268 .

[0328] (Embodiment 11) In this embodiment, an example of an electronic device will be described.

[0329] 19(A) to 19(H) and 20(A) to 20(D) are diagrams showing electronic devices. These electronic devices are composed of a housing 5000, a display unit 5001, a speaker 5003, an LE D lamp 5004, operation key 5005 (including power switch or operation switch), connection Terminal 5006, sensor 5007 (force, displacement, position, velocity, acceleration, angular velocity, rotation speed, distance , light, liquid, magnetism, temperature, chemicals, sound, time, hardness, electric field, current, voltage, power, radiation (including functions to measure flow rate, humidity, gradient, vibration, odor or infrared rays), It can have a 5008, etc.

[0330] FIG. 19(A) shows a mobile computer, which includes, in addition to the above, a switch 5009 , an infrared port 5010, etc. FIG. 19(B) shows a portable terminal equipped with a recording medium. A portable image reproducing device (for example, a DVD reproducing device) is also included. 19(C) shows a display unit 5002, a recording medium reading unit 5011, etc. It is a group-type display, and in addition to the above, it has a second display unit 5002, a support unit 5012 , earphones 5013, etc. FIG. 19(D) shows a portable gaming machine. In addition to the above, it may have a recording medium reading unit 5011, etc. It is a projector, and in addition to the above, has a light source 5033, a projection lens 5034, etc. FIG. 19(F) shows a portable gaming machine, which, in addition to the above, has a second display. 19(G) shows a TV. It is a TV receiver, and in addition to the components described above, may also have a tuner, an image processor, and the like. FIG. 19(H) shows a portable television receiver, which, in addition to the above, can transmit and receive signals. 20(A) is a display, and In addition to the above, it may have a support stand 5018, etc. In addition to the above, there is an external connection port 5019, a shutter button 5015, an image receiving 20C is a computer, and can have the above-mentioned In addition to the above, there is a pointing device 5020, an external connection port 5019, a reader / writer 5021, etc. FIG. 20(D) shows a mobile phone, In addition, antenna 5014, one segment partial reception service channel for mobile phones and mobile terminals It may have a tuner, etc.

[0331] The electronic devices shown in FIGS. 19(A) to 19(H) and 20(A) to 20(D) can be used in various ways. For example, various information (still images, videos, text images, etc.) can be stored. ) on the display, touch panel function, calendar, date or time display, etc. Functions for controlling processing using various software (programs), wireless communication functions , the ability to connect to various computer networks using wireless communication functions, wireless communication functions A function to send or receive various data using the program recorded on the recording medium. Or, it can have a function of reading out data and displaying it on a display unit. In electronic devices having such a display unit, one display unit is used to mainly display image information, and another display unit is used to A function that mainly displays text information on one display unit, or a function that takes parallax into account on multiple displays By displaying the image, it is possible to have a function of displaying a three-dimensional image. In electronic devices having an image receiving unit, there are functions for taking still images, taking moving images, and Function to automatically or manually correct captured images, and to save captured images to a recording medium (external or camera) It can have functions such as saving the captured image to a camera (built-in), displaying the captured image on the display, etc. In addition, the electronic devices shown in Figures 19(A) to 19(H) and Figures 20(A) to 20(D) The functions that the container can have are not limited to these, and the container can have a variety of functions.

[0332] The electronic device described in this embodiment has a display unit for displaying some information. It is characterized by the following.

[0333] Next, application examples of the semiconductor device will be described.

[0334] FIG. 20(E) shows an example in which a semiconductor device is integrated with a building. E) is a housing 5022, a display unit 5023, a remote control device 5024 as an operation unit, a speaker 5025, etc. The semiconductor device is a wall-mounted type that is integrated with the building and is installed in a It can be installed without requiring a large space.

[0335] FIG. 20(F) shows another example in which a semiconductor device is provided inside a building as an integral part of the building. The display panel 5026 is attached to the unit bath 5027. The viewer can then view the display panel 5026.

[0336] In this embodiment, a wall and a unit bath are used as examples of buildings. The configuration is not limited to this, and the semiconductor device can be installed in various structures.

[0337] Next, an example in which the semiconductor device is integrated with a moving object will be described.

[0338] FIG. 20G is a diagram showing an example in which the semiconductor device is provided in an automobile. The cable 5028 is attached to the body 5029 of the automobile and is connected to the body of the automobile or the inside or outside of the automobile. The information entered from the navigation function can be displayed on demand. It may have.

[0339] FIG. 20(H) is a diagram showing an example in which a semiconductor device is integrated with a passenger airplane. FIG. 20(H) shows a display panel 5031 mounted on a ceiling 5030 above the seats of a passenger airplane. The display panel 5031 is attached to the ceiling 5. 030 and the hinge part 5032 are attached together. This allows passengers to view the display panel 5031. The display panel 5031 is operated by passengers. It has the function of displaying information by

[0340] In this embodiment, an automobile body and an airplane body are exemplified as moving bodies. However, this is not limited to motorcycles, four-wheeled vehicles (including cars, buses, etc.), trains (mono It can be installed on a variety of things, including rails, railways, ships, etc. [Explanation of symbols]

[0341] 101 Circuit 102 circuits 301 area 302 areas 303 areas 1001 Equipment 1002 Point light source 1003 Threshold 1004 Threshold 1005 Spacer 1006 Vertical pitch 1007 Horizontal pitch 1011 Diffuser 1012 Display panel 1013 height 1014 height 1015 interval 1102 Surface light source 1103 Line light source 1104 Light guide plate 1105 bottom 1106 Fluorescent tube (cathode tube) 1107 Diffuser 5000 cabinets 5001 Display section 5002 2nd display section 5003 Speaker 5004 LED lamp 5005 Operation key 5006 Connection terminal 5007 Sensor 5008 Microphone 5009 Switch 5010 Infrared port 5011 Recording medium reading unit 5012 Support part 5013 Earphones 5015 Shutter button 5016 Image receiving unit 5018 Support stand 5019 External connection port 5020 pointing device 5021 Reader / Writer 5022 Housing 5023 Display section 5024 Remote control device 5025 Speaker 5026 Display Panel 5027 Unit bath 5028 Display Panel 5029 Car Body 5030 Ceiling 5031 Display Panel 5032 Hinge part 5033 Light source 5034 Projection Lens 5080 pixels 5081 Transistor 5082 Liquid crystal element 5083 Capacitor 5084 Wiring 5085 Wiring 5086 Wiring 5087 Wiring 5101 dashed line 5102 solid line 5103 dashed line 5104 Solid line 5105 solid line 5106 Solid line 5107 Solid line 5108 Solid line 5121 images 5121a Image 5121b Image 5122 images 5122a Image 5122b image 5123 images 5123a Image 5123b Image 5124 area 5125 area 5126 area 5127 Motion Vector 5128 Image Generation Vectors 5129 area 5130 Object 5131 area 5260 board 5261 Insulation layer 5262 Semiconductor layer 5262a area 5262b area 5262c area 5262d area 5262e area 5263 Insulation layer 5264 Conductive layer 5265 Insulation layer 5266 Conductive layer 5267 Insulation layer 5268 Conductive layer 5269 Insulation layer 5270 luminous layer 5271 Conductive layer 5300 board 5301 Conductive layer 5302 Insulation layer 5303a Semiconductor layer 5303b Semiconductor layer 5304 Conductive layer 5305 Insulation layer 5306 Conductive layer 5307 Liquid crystal layer 5308 Conductive layer 5350 area 5351 area 5352 Semiconductor substrate 5353 area 5354 Insulation layer 5355 area 5356 Insulation layer 5357 Conductive layer 5358 Insulation layer 5359 Conductive layer 5360 video signal 5361 Circuit 5361a circuit 5361b circuit 5362 Circuit 5362a circuit 5362b circuit 5363 Circuit 5364 Pixel section 5365 Circuit 5366 Lighting equipment 5367 pixels 5371 Wiring 5372 Wiring 5373 Wiring 5380 PCB 5381 input terminal

Claims

[Claim 1] A method for driving a liquid crystal display device having a backlight and pixels, comprising: a first step of performing super-resolution processing using first data; a second step of performing edge enhancement processing using the second data that has been subjected to the super-resolution processing; a third step of performing frame interpolation processing using the third data that has been subjected to the edge enhancement processing; a fourth step of performing a first local dimming process using the third data that has been subjected to the edge enhancement process; a fifth step of performing a second local dimming process using the fourth data that has been subjected to the frame interpolation process and the fifth data that has been subjected to the first local dimming process; a sixth step of performing an overdrive process using sixth data that has been subjected to the second local dimming process, the first local dimming process includes a process of controlling the luminance of the backlight, the second local dimming process includes a process of controlling a signal to be supplied to the pixel, the third step and the fourth step are performed simultaneously; A method for driving a liquid crystal display device, wherein the fifth step is carried out after the third step and after the fourth step.

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