87results about How to "Luminance can be restrained" patented technology

An LED chip mounting structure provided by the present invention includes a wiring board with a mounting pad (45R), an LED chip (10) with an electrode (12) facing the mounting pad (45R), a bump (47) disposed between the mounting pad (45R) and the electrode (10) to electrically connect the mounting pad (45R) to the electrode (10), and an adhesive member (7) for fixing the LED chip (10) to the wiring board (41).

A display device and a driving method thereof includes categorizing red-color, green-color, and blue-color image signals as belonging to one of first and second signal regions, detecting if the image signals have more signals belonging to the first signal region than the second signal region or if the image signals have more signals belonging to the second signal region than the first signal region, driving an image display portion in a first manner if the image signals are detected to have more signals belonging to the first signal region than the second signal region, and driving the image display portion in a second manner if the image signals are detected to have more signals belonging to the second signal region than the first signal region, the image display portion including a plurality of pixels, each of the pixels having red-color, green-color, blue-color, and white-color sub-pixels.

By controlling the luminance of light emitting element not by means of a voltage to be impressed to the TFT but by means of controlling a current that flows to the TFT in a signal line drive circuit, the current that flows to the light emitting element is held to a desired value without depending on the characteristics of the TFT. Further, a voltage of inverted bias is impressed to the light emitting element every predetermined period. Since a multiplier effect is given by the two configurations described above, it is possible to prevent the luminance from deteriorating due to a deterioration of the organic luminescent layer, and further, it is possible to maintain the current that flows to the light emitting element to a desired value without depending on the characteristics of the TFT.

Disclosed is a an in-cell type display device including a touch screen function which is capable of preventing a luminance from being changed in accordance with a viewing angle, and omitting a process of connecting touch electrodes provided in an upper substrate with Tx driver and Rx driver connected with a lower substrate, wherein the display device includes a lower substrate, a thin film transistor layer including thin film transistors provided on the lower substrate, an encapsulation layer provided on the thin film transistor layer, color filters provided on the encapsulation layer, a black matrix provided between the color filters and provided on the encapsulation layer, and first touch electrodes overlapped with the black matrix.

A display device in which not only a variation in a current value due to a threshold voltage but also a variation in a current value due to mobility are prevented from influencing luminance with respect to all the levels of grayscale to be displayed. After applying an initial potential for correction to a gate and a drain of a driving transistor, the gate and the drain of the driving transistor is kept connected in a floating state, and a voltage is held in a capacitor before a voltage between the gate and a source of the driving transistor becomes equal to a threshold voltage. When a voltage obtained by subtracting the voltage held in the capacitor from a voltage of a video signal is applied to the gate and the source of the driving transistor, a current is supplied to a light-emitting element. A value of an initial voltage for correction differs in accordance with the voltage of the video signal.

The present invention provides a light-emitting element that includes a pair of electrodes, and an organic compound that has a glass-transition temperature of 150° C. or more, preferably 160° C. or more and 300° C. or less, and a metal oxide that are provided between the pair of electrodes, or includes a pair of electrodes, and a compound having a spiro ring and a triphenylamine skeleton and a metal oxide that are provided between the pair of electrodes. It is a feature that the compound has a spiro ring and a triphenylamine skeleton is a benzidine derivative represented by a general formula (1) In the formula, R1 is hydrogen or an alkyl group having 1 to 4 carbon atoms.

Disclosed is a light emitting diode (LED) street lamp using an LED as a light source and capable of minimizing a luminance deviation within an illuminated area while increasing the luminance of the entire illuminated area. The LED street lamp includes a case provided at a front end of a lamp post; a board provided inside the case and having a plurality of LEDs spaced apart from each other; and heat dissipation units closely adhered to the board and dissipating heat generated when the LEDs emit light, wherein the plurality of LEDs have different luminance levels from each other, the luminance levels gradually increase from the center of the board to the edge of the board, and diffusing members diffusing the light generated from the plurality of LEDs are provided on board portions corresponding to areas between each of the plurality of LEDs.

The present invention is to provide a light emitting device capable of obtaining a certain luminance without influence by the temperature change, and a driving method thereof. A current mirror circuit formed by using a transistor is provided for each pixel. The first transistor and the second transistor of the current mirror circuit are connected such that the drain currents thereof are maintained at proportional values regardless of the load resistance value. Thereby, a light emitting device capable of controlling the OLED driving current and the luminance of the OLED by controlling the drain current of the first transistor at a value corresponding to a video signal in a driving circuit, and supplying the drain current of the second transistor to the OLED, is provided.

A backlight device includes a housing, a light source, a diffuse plate and a fixing member. The housing has an open surface. The light source is arranged in the housing. The diffuser plate is arranged on the open surface of the housing and allows light emitted from the light source to pass therethrough while diffusing the light. The fixing member prevents the diffuser plate from bending in a direction in which light passes through the diffuser plate. A part of the fixing member has transmittance adjusted to substantially equalize luminance distribution of light passed through the diffuser plate.

Disclosed herein is a display apparatus has a pixel array section including: pixel circuits which are each provided with a driving transistor and an electro-optical device and are laid out to form a matrix; and a draw wire provided in each of the pixel circuits to serve as a wire connecting the driving transistor to a power-supply providing line, wherein the resistance of the draw wire is relatively large in the pixel circuit close to a source applying a power-supply voltage to the power-supply providing line.

A backlight device for LCD displays is disclosed herein. The backlight device contains multiple LEDs as light source and a uniforming chamber positioned between the LEDs and the LCD panel. Lights emitted from the LEDs undergo multiple times of total reflection by the inner walls of the uniforming chamber to produce a highly uniform planar light, regardless of the length of their usage period, the differences of LEDs' hues and brightness, and whether some LEDs are failed. The backlight device does not require the diffusion plates and prism plates, which not only reduces cost but also avoids the luminous flux loss. Also, the backlight device could achieve the slimmest thickness without sacrificing cost, heat dissipation, and power consumption.

A stereoscopic image display apparatus includes: a plane display device; a lens array provided in front of the display surface to distribute light rays from pixels of the display device to predetermined angles, and having a plurality of lenses arranged in a first direction; a variable polarizer provided between the plane display device and the lens array to polarize light rays from the pixels; and a double refraction prism array provided on an opposite side of the lens array from the display device, and including a plurality of double refraction prisms. Each of the double refraction prisms has a ridge in a second direction perpendicular to the first direction and arranged in the first direction with a pitch which is substantially twice a lens pitch in the lens array, and has double refraction in which a refractive index in a ridge direction is different from a refractive index in a direction perpendicular to the ridge direction.

In the device for voltage driving the self-luminous display element, the self-luminous display element driving device includes a circuit for generating deterioration information concerning a deterioration state of the self-luminous display element, and a circuit for adjusting a voltage applied to the self-luminous display element, on the basis of the deterioration information generated by the deterioration information generating circuit. The deterioration information generating circuit generates the deterioration information on the basis of a time, a luminance, a current value or a voltgage value, etc. The self-luminous display element may be, for example, an EL (electroluminescence) element or an organic EL element.

A first current mirror circuit including an input side transistor, an output transistor and passive elements respectively connected in series with said input side transistor and said output side transistor, temperature coefficients of said passive elements being opposite in characteristics and a second current mirror circuit provided as a load circuit of the first current mirror circuit, for feeding back an output current of the output side transistor to an input of the input side transistor are provided. A drive current is generated on a basis of a current corresponding to a current generated in the output side transistor as a reference current and an operating current ratio of the input side transistor and the output side transistor is selected such that luminance change of organic EL elements with respect to temperature change is restricted.

A solid-state image pick-up apparatus that is capable of suppressing luminance flicker and chroma flicker occurring under a florescent lamp. The apparatus has a CCD solid-state image pick-up device. The image pick-up device further includes an accumulation region that is able to temporarily accumulate signal charges that have been photoelectrically converted in a sensor unit. The device is able to exercise exposure control with the use of an electronic shutter. The apparatus also has a timing generating circuit that generates a shutter pulse XSUB and a read pulse XSG. The shutter pulse XSUB is used for determining a plurality of (for example, three) exposure periods during one field for the image pick-up device. The read pulse XSG is used for reading to the accumulation region the signal charges that have been accumulated in the sensor unit during a plurality of exposure periods.

A display device in which not only a variation in a current value due to a threshold voltage but also a variation in a current value due to mobility are prevented from influencing luminance with respect to all the levels of grayscale to be displayed. After applying an initial potential for correction to a gate and a drain of a driving transistor, the gate and the drain of the driving transistor is kept connected in a floating state, and a voltage is held in a capacitor before a voltage between the gate and a source of the driving transistor becomes equal to a threshold voltage. When a voltage obtained by subtracting the voltage held in the capacitor from a voltage of a video signal is applied to the gate and the source of the driving transistor, a current is supplied to a light-emitting element. A value of an initial voltage for correction differs in accordance with the voltage of the video signal.

A display device capable of keeping the luminance constant irrespective of temperature change is provided as well as a method of driving the display device. A current mirror circuit composed of transistors is placed in each pixel. A first transistor and a second transistor of the current mirror circuit are connected such that the drain current of the first transistor is kept in proportion to the drain current of the second transistor irrespective of the load resistance value. The drain current of the first transistor is controlled by a driving circuit in accordance with a video signal and the drain current of the second transistor is caused to flow into an OLED, thereby controlling the OLED drive current and the luminance of the OLED.

A pixel, a display device including the same, and a driving method thereof. The display device includes: a data driver transmitting data signals; a scan driver generating and transmitting scan signals; a display panel including pixels, each emitting light with a driving current according to the data signals; a compensation signal unit generating and transmitting a compensation control signal for controlling simultaneous transmission of a predetermined bias voltage to each of the pixels before a data voltage according to the data signals is applied to each of the pixels; a power controller controlling voltage levels of the first power source voltage and the second power source voltage and supplying the level-controlled first and second power source voltages; and a timing controller generating the data signals by processing an external image signal and generating a plurality of driving control signals.

A gas-filled LED bulb includes a shell, a holder, and a filament assembly. The shell defines a chamber therein, and the chamber is filled with thermally conductive gas. The holder is secured in the chamber. The filament assembly is positioned in the chamber. The filament assembly includes a plurality of LEDs in a SMD or a CSP and a plurality of metallic wires. The LEDs and the metallic wires are alternatively connected to each other to form a chain. Opposite ends of the filament assembly are fixed to the holder.

A small switch having a liquid crystal display includes an operation button; a liquid crystal display device having a liquid crystal panel for displaying information including characters and / or pictures on the operation button and a printed circuit board on which an IC chip, which serves as a driver circuit for the liquid crystal panel, is mounted, the liquid crystal display device being housed in the operation button; a switch body including a contact mechanism for opening and closing an electrical path by vertically moving the operation button; and backlight sources having different colors. The liquid crystal panel is an antiferroelectric liquid crystal panel. The backlight sources are sequentially turned on at high speed below the antiferroelectric liquid crystal panel, and liquid crystal screens having different display contents for every color are displayed in synchronization with the turning on of the backlight sources to achieve multicolor display.

When an average peak level is high, and there is a difference in weight between a subfield SF1 on the lowest level and a subfield SF2 on the second lowest level while their sustain cycle numbers are equal, all scan electrodes are scanned for the subfield SF1 on the lowest level. Simultaneously, data pulses according to video signals are impressed on data electrodes only when an odd number scan electrode is scanned in an odd number field (an nth frame), and the data pulses according to the video signals are impressed on the data electrodes only when an even scan number electrode is scanned in an even number field (an (n+1)th frame).

The present invention is to provide a light emitting device capable of obtaining a certain luminance without influence by the temperature change, and a driving method thereof. A current mirror circuit formed by using a transistor is provided for each pixel. The first transistor and the second transistor of the current mirror circuit are connected such that the drain currents thereof are maintained at proportional values regardless of the load resistance value. Thereby, a light emitting device capable of controlling the OLED driving current and the luminance of the OLED by controlling the drain current of the first transistor at a value corresponding to a video signal in a driving circuit, and supplying the drain current of the second transistor to the OLED, is provided.

A prism sheet that allows light that is incident with an angle below 2.8° with respect to an axis normal to a light incident surface to be refracted and emitted, and a liquid crystal display device including the prism sheet are presented. The prism sheet includes a first surface through which light from a light source enters the prism sheet and a second surface through which the light exits the prism sheet. The second surface also includes polygonal protruding members having length axes substantially parallel to each other. Each of the polygonal protruding members has at least one first side forming an angle ranging from 65° to 75° with respect to a line normal to the first surface, and at least one second side forming an angle ranged from 40° to 50° with respect to a line normal to the first surface.

Disclosed herein is a display apparatus has a pixel array section including: pixel circuits which are each provided with a driving transistor and an electro-optical device and are laid out to form a matrix; and a draw wire provided in each of the pixel circuits to serve as a wire connecting the driving transistor to a power-supply providing line, wherein the resistance of the draw wire is relatively large in the pixel circuit close to a source applying a power-supply voltage to the power-supply providing line.

The image display quality is improved by reducing the afterimage phenomenon of a display image on a plasma display panel. For this purpose, the image display region of the panel is divided into a plurality of regions, the difference between the luminance gradation value in the present field and that in the field immediately before the present field is calculated as the inter-field luminance difference. Then, the number of pixels where the inter-field luminance difference is lower than a predetermined luminance comparison value is counted, and the counting result is set as a first count value. The number of edges where the difference between the luminance gradation values of adjacent pixels is equal to a predetermined edge comparison value or larger is counted, and the counting result is set as a second count value. The afterimage strength level region is calculated based on the first and second count values.

A liquid crystal display includes a first substrate, a first gate line disposed on the first substrate, a second gate line disposed on the first substrate, a data line disposed on the first substrate, a reference voltage line disposed on the first substrate and extending substantially to be parallel to the data line, a first subpixel electrode disposed in a pixel area on the first substrate, a second subpixel electrode disposed in the pixel area on the first substrate, a first switching element connected to the first gate line, the data line and the first subpixel electrode, a second switching element connected to the first gate line, the data line and the second subpixel electrode, and a third switching element connected to the first subpixel electrode and the reference voltage line.

An aging circuit for an organic electro luminescence device includes a plurality of pixels arranged in a matrix at intersection areas of row lines and column lines and an aging circuit having at least one aging AC voltage source to apply a specific aging AC voltage pulse to the pixels.

Disclosed is an optical composite for use in a backlight unit of a liquid crystal display or an illumination apparatus, which is able to sufficiently increase luminance and in which adhesion portions are regularly arranged to thus induce an optical illusion effect so that scratches or stains cannot be seen clearly. A method of manufacturing such an optical composite is also provided. There is no need to additionally use optical films or prism sheets, thus making it possible to inexpensively manufacture optical devices, such as backlight units.

The present invention relates to a plasma display device and to a method of producing a phosphor to be used for the device, that prevents the phosphor layer from deteriorating, and improves the luminance, life, and reliability, of a plasma display panel (PDP). The plasma display device is equipped with a plasma display panel in which a plurality of discharge cells are arranged, phosphor layers (110R, 110G, 110B) in color corresponding to each discharge cell are disposed, and phosphor layers (110R, 110G, 110B) are excited by ultraviolet light to emit light. Green phosphor layer (110G) has a green phosphor including Zn2SiO4:Mn, the element ratio of zinc (Zn) to silicon (Si) at the proximity of its surface is 2 / 1, which is the stoichiometric ratio, and the layer is positively charged or zero-charged.