Display system

Abstract

To provide a newly configured display system, and a mobile body.SOLUTION: A display system includes a display panel, a correction circuit and a storage circuit. The display panel is flexible, and has a display area and a non-display area. The storage circuit has a function of storing first information on the display area and second information on the non-display area. The non-display area includes an area overlapping the display area by bending the display panel. The correction circuit has a function of generating image data to be written into pixels of the display area on the basis of the first information and the second information.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] One aspect of the present invention relates to a display system and a moving object. In particular, a display system having a curved display surface A display system including a display panel that can be used with a flexible display panel, and a mobile device including a flexible display panel Regarding. [Background technology]

[0002] Curved display with organic EL (Electro Luminescence) elements A curved display is a device that displays images on a curved surface. This refers to a display having

[0003] Curved displays are used in instrument panels (hereinafter referred to as instrument panels) of moving objects such as vehicles. It is expected that applying this to the design will improve the appearance ( For example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-134295 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-112251 Summary of the Invention [Problem to be solved by the invention]

[0005] When creating a complex shaped instrument panel using a curved display, multiple display panels must be If display panels can be applied to complex shapes, In addition to improving the display performance, it is possible to improve the visibility. If the shapes are different, it is necessary to prepare display panels with different shapes. When multiple display panels are produced, the production cost increases.

[0006] One aspect of the present invention is a novel display system and a mobile object or the like equipped with the display system. One of our goals is to provide

[0007] Alternatively, one embodiment of the present invention is a method for displaying a display image by combining a plurality of display panels having different shapes. A novel display system that can suppress an increase in production costs even in the case of It is another object of the present invention to provide a mobile object or the like equipped with the display system. The present invention provides a novel display system that can improve visibility, and the display system One of the objectives is to provide a mobile object etc. equipped with the above. [Means for solving the problem]

[0008] One embodiment of the present invention includes a display panel, a correction circuit, and a memory circuit. The display panel is flexible and has a display area and a non-display area. The memory circuit is and a function of storing first information about the non-display area and second information about the non-display area. The area has an area that overlaps with the display area by folding the display panel, and the correction circuit is generating image data to be written to pixels in a display area based on the first information and the second information; It is a display system that has the function of

[0009] One embodiment of the present invention is a display device including a first display panel, a first correction circuit, a first memory circuit, and a second memory circuit. a first display panel, a second correction circuit, and a second memory circuit; The first and second display panels are flexible, and the first display panel has a first display area and a first the first display panel has a second display area and a second non-display area. The first storage circuit stores first information about the first display area and first information about the first non-display area. the second storage circuit has a function of storing second information relating to the second display area, and a fourth information relating to the second non-display area, The area has an area that overlaps with the first display area by folding the first display panel, and the second The non-display area has an area overlapping with the second display area by folding the second display panel. The first correction circuit corrects the pixels of the first display area based on the first information and the second information. The second correction circuit has a function of generating first image data to be written, and the third correction circuit has a function of generating third image data to be written. and second image data to be written to the pixels of the second display area based on the fourth information. It is a display system that has the function of generating.

[0010] In one embodiment of the present invention, a display panel includes a transistor and a transistor electrically connected to the transistor. a display element connected to the transistor, and the transistor has an oxide semiconductor in a channel formation region. A display system in which the

[0011] In one embodiment of the present invention, the display element is an organic electroluminescence element. The system is preferred.

[0012] One aspect of the present invention is an instrument panel to which the above-described display system is applied. It is a mobile object.

[0013] Other aspects of the present invention will be described in the "Mode for Carrying Out the Invention" below. , and as described in the "Drawings." [Effects of the Invention]

[0014] One aspect of the present invention is a novel display system and a mobile object or the like equipped with the display system. can be provided.

[0015] Alternatively, one embodiment of the present invention is a method for displaying a display image by combining a plurality of display panels having different shapes. A novel display system that can suppress an increase in production costs even in the case of A mobile object or the like including the display system can be provided. A novel display system that can improve visibility, and a display device equipped with the display system It is possible to provide a mobile object, etc. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a diagram illustrating the configuration of a display panel in a moving object. [Figure 2] FIG. 1 is a diagram illustrating the configuration of a display panel in a moving object. [Figure 3] 1A and 1B are a block diagram and a flowchart for explaining a display system. [Figure 4] FIG. 1 is a block diagram illustrating a display system. [Figure 5] 4A and 4B are diagrams for explaining image data to be displayed on a display panel. [Figure 6] 1A and 1B are diagrams illustrating an example of the configuration of a display panel. [Figure 7] 1A and 1B are diagrams illustrating configuration examples of memory cells in a memory circuit. [Figure 8] 1A and 1B are diagrams illustrating an example of the configuration of a pixel in a display panel. [Figure 9] FIG. 1 is a diagram illustrating the configuration of a display panel in a moving object. [Figure 10] FIG. 1 is a diagram illustrating the configuration of a display panel in a moving object. [Figure 11] FIG. 1 is a diagram illustrating the configuration of a display panel in a moving object. [Figure 12] FIG. 2 is a diagram for explaining the configuration of an imaging device and a display panel in a moving object. [Figure 13] FIG. 1 is a diagram illustrating an example of a moving object. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, one embodiment of the present invention will be described with reference to the drawings. It is possible to implement the present invention in many different 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 can be made to the form and details. Therefore, the present invention should not be construed as being limited to the following description.

[0018] <Display system configuration> A configuration example of a display system according to one embodiment of the present invention will be described. The present invention can be applied to a display (also called a display panel) having a display surface.

[0019] An example of a curved display surface is an instrument panel ( Therefore, in the examples of the display system below, unless otherwise specified, An example of applying the display system to an instrument panel of an automobile will be described. This type of display system is not limited to automobile instrument panels, but can be used on any display with a display surface. Examples of moving bodies other than automobiles include buses, trains, and airplanes.

[0020] FIG. 1(A) shows an instrument panel of a vehicle provided with a display panel applicable to the display system. The vehicle 10 has a plurality of display panels provided on a dashboard 12. The wheels 11A to 11D, the handle 13, the window 14, and the pillar 15 are shown.

[0021] FIG. 1B shows a display panel that can be applied to the display panels 11A to 11D shown in FIG. 1A. 1(B) is a schematic diagram of a cross section of a dashboard 12 and a steering wheel 13. In both cases, the display panel 20 (or the display panel 11A) is mounted on the curved surface of the dashboard 12. The display panel 20 is shown in the figure with a display panel (corresponding to any one of the display panels 11A to 11D) attached. The curved surface has a display area 21 in a certain area, and a non-display area 22 and and control IC30.

[0022] The transistors and display elements of the display panel 20 are provided on a flexible substrate. Therefore, the display panel 20 has flexibility. That is, as shown in FIG. 1(B), The panel can be bent at the bent portion 23 and attached to the dashboard 12. The non-display area 22 and the display area 21 of the display panel 20 are overlapped by the presence of the recess 23. Let's say.

[0023] The control IC 30 has a function of generating image data. The image data is written to the pixels in the display area 21 and has a memory circuit, a correction circuit, etc. Generate data.

[0024] The memory circuit of the control IC 30 stores the data of the pixels that form the display area of ​​the display panel 20. The present invention has a function of storing information on the position of pixels in the non-display area and information on the position of pixels in the non-display area. The display system of one aspect is configured with a plurality of display panels, and The display area and non-display area are differentiated in the display panel control IC. For every 30 pixels, the information on the position of the pixels in the display area and the information on the position of the pixels in the non-display area is A memory circuit capable of storing data is provided.

[0025] The correction circuit of the control IC 30 is configured to correct the pixel in the display area of ​​the display panel 20. This is a circuit that has the function of generating image data to be written. The correction circuit does not provide image data to pixels in the non-display area, but only to pixels in the display area. The image data is corrected to provide image data that contributes to the display. Since the image data can be updated only by pixels, unnecessary image data is not written. This allows for a reduction in power consumption.

[0026] The correction circuit for the control IC 30 is provided for each control IC 30 of the display panel. With this configuration, the display system of one embodiment of the present invention can display different images for each display panel. Based on the information of the pixels that will be in the display area, image data for the pixels in the display area is generated. It can be output by

[0027] FIG. 2 illustrates a specific example of a display system according to one embodiment of the present invention. A plurality of display panels 11A are provided on a dashboard 12 of a vehicle 10 shown in FIG. The display panels 11A to 11D shown in FIG. For example, the display panel 11B and the display panel 11C shown in FIG. , have display surfaces of different shapes.

[0028] A display surface having a complex shape such as the display surface formed by the display panels 11A to 11D in FIG. When forming the display panel, multiple display panels with different shapes are combined to form the display panel. The display system according to one aspect of the present invention is effective for such a configuration. In this display system, the display area varies depending on the display panel, and the non-display area is folded. These display panels have different display areas and Since it can be made by folding in the non-display area, the base display panel can be made from the same display panel. Therefore, mass production efficiency can be achieved. In a display panel applied to such a system, the manufacturing cost can be reduced.

[0029] Note that the display panel of the display system according to one embodiment of the present invention may be a display panel between a plurality of different display panels. It is also effective to configure the non-display areas so that they overlap each other. In this case, the pixels in the non-display area By displaying the overlapping areas in black, the overlapping areas can be made less noticeable. It is difficult to fold all four sides of the screen, so the non-display area is displayed in black. The overlapping structure involves folding the non-display area on two sides of the rectangular display panel and This is effective in a configuration in which the non-display area in the image is overlaid as a black display.

[0030] In the example of FIG. 2, the display panel 11B and the display panel 11C are manufactured based on the same display panel. That is, the display panel 20 having the same pixel section 24 as shown in FIG. The display panel 2 that will become the display panel 11B and the display panel 11C can be manufactured based on the above. 0, the display area 21D and the display area 21E, and the non-display area 22D and the non-display area Information is stored in the memory circuit so that it becomes the area 22E, and a different image is generated by the correction circuit based on the information. The non-display area 22D and the non-display area 22E, which do not become the display surface, are The display panel 20 is folded to have an area overlapping the display area. This allows for a reduction in the space required to install the display panel 20. A display surface with a complex shape such as the display surface composed of 11A to 11D can be formed. This makes it possible to provide a display system that can improve design.

[0031] FIG. 3A is a block diagram illustrating an example of the configuration of the control IC 30. The control IC 30 shown in FIG. 3(A) includes, for example, an interface 32, a correction circuit 33, timing controller 34, display driver IC 35 and memory circuit 36 FIG. 3A also shows a host computer that provides image data to the control IC 30. 3A shows the controller 31 after the control IC 30 is corrected. The display panel 11 that provides image data is shown. Also, FIG. 3A shows a memory circuit 36. The display area data 37 is shown as information stored in the storage device.

[0032] In the control IC 30, the uncorrected image provided by the host controller 31 The data is provided to a correction circuit 33 via an interface 32. , referring to the display area data 37 stored in the memory circuit 36, the image data before correction is displayed. The image data is corrected to correspond to the display area of ​​the panel 11. The corrected image data is to the display panel 11 via the timing controller 34 and the display driver IC 35. Given.

[0033] FIG. 3B is a flow chart for explaining the operation of the controller IC 30 shown in FIG. 3A. Image data is input to the controller IC 30 (step S01 The correction circuit 33 of the controller IC 30 receives the input via the interface 32. In order to correct the given image data into image data corresponding to the display area, the image data is stored in the memory circuit 36. The correction circuit 33 reads and acquires the stored display area data 37 (step S02). The original image data is processed based on the display area data 37 and displayed in the display area. The corrected image data is then corrected to the image data for timing (step S03). The signal is output to the display panel 11 via the controller 34 and the display driver IC 35. (Step S04).

[0034] The calculation process performed by the correction circuit 33 based on the display area data 37 is performed by displaying the original image data. Any image processing can be used to process image data that matches the shape of the display area. Image processing is performed to thin out the original image data so that the image data given to the pixels in the area becomes blank. The image data to be given to the pixels in the non-display area is image data corresponding to black. By converting the image to a light-emitting display panel, power consumption can be reduced. Image data is processed to reduce or enlarge it, and the image data is adjusted to fit the size of the display area. All that is required is to perform arithmetic processing using the data.

[0035] The display area data is mask data corresponding to each pixel of the display panel 11. Specifically, for each pixel, the coordinates are set to "1" if the pixel is in the display area, and "2" if it is not in the display area. If the pixel is in the display area, it is set to "0" as mask data. The logical product operation is performed on the image data to be processed and the data corresponding to the coordinates of each pixel. By doing so, the image data corresponding to the pixels in the non-display area is set to "0", that is, black display. On the other hand, the image data values ​​corresponding to the pixels in the display area are not changed. By adopting such a configuration, the boundary between the display area and the non-display area can be freely set.

[0036] As other display area data, when the display area is a rectangular area, each The coordinate data of the vertex and the area above, below, left, or right of the line connecting the vertex data are hidden areas. The coordinate data of the vertex can be used as the data for determining whether the vertex is in the non-display area. Based on the data and non-display area determination data, the inside and outside of the rectangular area are determined for the image data. In this case, the non-display data can be set to "0", that is, black display. This makes it possible to reduce the amount of data stored as display area data.

[0037] In a display system that combines multiple display panels, as shown in the block diagram in Figure 4, In FIG. 4, the plurality of display panels include display panel 11A and display panel 1 1B. Also, in FIG. 4, a controller that supplies image data to a display panel 11A is shown. a controller IC30A for supplying image data to the display panel 11B; and a controller IC30B for supplying image data to the display panel 11B. The host controller 31 includes a controller IC 30A and a controller The controller IC 30B can be supplied with other image data.

[0038] The control IC 30A shown in FIG. 4 includes, for example, an interface 32A, a correction circuit A circuit 33A, a timing controller 34A, a display driver IC 35A, and a memory 4 shows the display area data stored in the memory circuit 36A. The control IC 30B shown in FIG. interface 32B, correction circuit 33B, timing controller 34B, display driver 4, the memory circuit 36B includes a driver IC 35B and a memory circuit 36B. As information to be displayed, display area data 37B is illustrated.

[0039] When the display areas of the display panel 11A and the display panel 11B shown in FIG. The display area data 37A of the circuit 36A and the display area data 37B of the storage circuit 36B are different. By adopting this configuration, different display modes can be displayed on the display panel 11A and the display panel 11B. It is possible to output image data according to the shape of the display area.

[0040] The display area of ​​the display panel provided on the curved surface is configured to display in a curved state. For example, in the schematic diagrams of FIGS. 5A and 5B, the display panel 20 is displayed in a flat state. Fig. 5(A) is a schematic view from above, and Fig. 5(B) is a view from diagonally above. 5A and 5B, the pixel section 24, the display area 21A, and the non-display area 21B are Area 22A is shown.

[0041] On the other hand, in FIG. 5(C), the surface of the display panel 20A shown in FIG. 5(B) is curved. As can be seen from FIG. 5(C), in a display panel having a curved surface, The appearance varies depending on the shape of the surface or the user's viewpoint.

[0042] Therefore, the controller IC of the display panel curves the image data to be displayed in the display area. For example, as shown in the schematic diagrams of Figures 5(D) and (E), In this way, even if the display area is rectangular, the boundary of the display area 21B has an arc shape. 5(D) and 5(E), the pixel section 24, the display area 21B, the non- Display area 22B is shown.

[0043] FIG. 5(F) corresponds to a diagram in which the surface of the display panel 20B shown in FIG. 5(E) is curved. As shown in FIGS. 5(D) and 5(E), by making the display area 21B slightly fan-shaped, When the surface is curved, the appearance of the surface shape can be made less distorted. However, depending on the user's viewpoint, the image may appear three-dimensional.

[0044] Note that the non-display areas 22A of the display panels 20A and 20B shown in FIGS. 5(A) and 5(D) , 22B are areas that do not contribute to the display of the image. It is preferable to fold the non-display areas 22A and 22B as shown in FIG. In the display panel 20C shown in FIG. 6(A), a display area 21C and a non-display area As shown in FIG. 6A, the display area 21C and the non-display area 22C are By folding the display panel 20C near the boundary, the display panel 20C has a folded portion 23C. The display panel 20C having the bent portion 23C can be divided into a display area 21C and a non-display area 21C. It is possible to provide an area that overlaps with the area 22C, thereby saving space on the display panel. can.

[0045] Note that a display panel that can be applied to the display system according to one embodiment of the present invention can be combined with other components as appropriate. As an example, in FIG. 6B, a display panel 20 and a polarizing The display panel 20D is shown in FIG. This limits the direction (angle) from which the user can view the display panel, preventing distortion for the user. This allows a smaller number of images to be more reliably viewed.

[0046] <Memory cells applicable to memory circuits> 7A to 7F show examples of memory cell configurations that can be applied to the above-described memory circuits. I will explain.

[0047] FIG. 7A is a block diagram illustrating a configuration example of a memory circuit. In the block diagram, a memory cell array 90, a word line driver circuit 91, and a bit line driver circuit 92 are shown. A circuit 92 is shown.

[0048] The memory cell array 90 is a matrix of m rows and n columns (m and n are natural numbers). The memory cells MC are connected to the word lines WL_1 to WL_m and the bit lines WL_1 to WL_m. The memory cells MC are connected to the bit lines and word lines as well as , a source line for passing current, and a wiring for applying voltage to the back gate of the transistor. Alternatively, one electrode of the capacitor element may be connected to a capacitor line or the like for setting the electrode to a fixed potential. .

[0049] The word line driving circuit 91 outputs a signal for selecting the memory cells MC in each row. The word lines WL_1 to WL_m are separate lines for writing and reading. There may also be a wire.

[0050] The bit line driver circuit 92 writes data to the memory cells MC in each column, or This is a circuit for reading data from the memory cells MC. BL_n may have separate bit lines for writing and reading.

[0051] 7B to 7F show circuit configurations that the memory cell MC described in FIG. 7A can have. An example is shown below.

[0052] The memory cell MC_A shown in FIG. 7B includes a transistor OS1 and a capacitance element 93. The transistor OS1 is a transistor having an oxide semiconductor in a semiconductor layer (OS transistor). The OS transistor is a transistor that has silicon in the semiconductor layer (S Compared to conventional transistors, the leakage current (off-state current) when in a non-conducting state is extremely low. Therefore, by turning off the transistor OS1, the charge retention node Therefore, the charge storage node SN can store a charge according to the data. This allows the refresh rate of the data stored in the memory to be reduced.

[0053] The memory cell MC_B shown in FIG. 7C includes a transistor OS2 and a capacitance element 93. The transistor OS2 is an OS transistor. The difference from 1 is that the gate and back gate are electrically connected, and the voltage of the word line WL is applied from both sides. By using this configuration, the transistor OS2 is turned on. When the gate is turned on, the amount of current flowing between the source and the drain can be increased.

[0054] The memory cell MC_C shown in FIG. 7D includes a transistor OS3 and a capacitance element 93. The transistor OS3 is an OS transistor. The difference from 1 is that the back gate and the back gate line BGL are electrically connected, and the back gate The point is that a voltage different from that applied to the gate is applied to the transistor. The amount of current flowing between the source and drain can be controlled by controlling the threshold voltage of the transistor OS3. can.

[0055] The memory cell MC_D shown in FIG. 7(E) includes a transistor OS1, a transistor M1, and a and a capacitance element 93. Either the source or the drain of the transistor OS1 is The other of the source and drain of the transistor OS1 is connected to the bit line WBL. The gate of the transistor M1 is connected to one electrode of the capacitor 93. The gate of S1 is connected to the write word line WWL. One of the source and drain of the transistor M1 is connected to the read word line RWL. The other of the source and drain of the transistor M1 is connected to the read bit line RBL. The transistor M1 is a p-channel transistor. An n-channel transistor may be used. By making the transistor OS1 non-conductive, The charge holding node SN can hold a charge according to the data. This is a transistor that has silicon in the channel formation region (Si transistor). The transistor OS1 can have the same configuration as the above-mentioned transistors OS2 and OS3. Cut.

[0056] The memory cell MC_E shown in FIG. 7(F) includes a transistor OS1, a transistor M1, and a transistor The transistor M2 and the capacitance element 93 are connected to the source or drain of the transistor OS1. One of the terminals is connected to the write bit line WBL. The other end of the drain is connected to the gate of the transistor M1 and one electrode of the capacitance element 93. The gate of the transistor OS1 is connected to the write word line WWL. The other electrode of the transistor M1 is connected to the capacitance line CL. The other end is connected to either the source or drain of transistor M2. The other of the source and drain is connected to a source line SL. The other of the source and drain of the transistor M2 is connected to the read word line RWL. The transistor M2 is a p-channel transistor. However, an n-channel transistor may be used. This allows the charge storage node SN to store a charge according to the data. The transistor M2 is a Si transistor. It can have the same configuration as OS2 and OS3.

[0057] Note that the configurations of the memory cells shown in FIGS. 7B to 7F are different from those shown in FIGS. 7A to 7F in that the amount of data stored in the memory circuit increases. This is particularly effective when adding memory cells to the memory circuit. ), the configuration with one to three memory cells suppresses the increase in circuit area. In particular, the memory cell configurations shown in FIGS. 7B to 7D can suppress an increase in the circuit area. It is valid.

[0058] In addition, the OS transistor has the same characteristics as the Si transistor, and the fluctuation of the transistor characteristics when the operating temperature rises is Therefore, it can operate within the temperature range required for automotive applications. Therefore, the memory circuit can perform this operation more reliably.

[0059] Note that the circuit configurations illustrated in FIGS. 7B to 7F are merely examples and are not intended to be limiting examples of the present invention. Any configuration may be used as long as it is practical.

[0060] <Example of pixel configuration of a display panel> This section describes an example of the pixel configuration of a display panel that can be applied to the above display system. do.

[0061] FIG. 8A is a block diagram illustrating an example of the configuration of a display panel.

[0062] The display panel 500 shown in FIG. 8A includes a driving circuit 541, a driving circuit 542A, and a driving circuit The driver circuit 541, the driver circuit 542A, and the pixel portion 543 are and drive circuit 542B may be collectively referred to as a "drive circuit" or a "peripheral drive circuit." .

[0063] The driving circuit 542A and the driving circuit 542B can function as, for example, a scanning line driving circuit. In addition, the driver circuit 541 can function as, for example, a signal line driver circuit. A and the driver circuit 542B may be either one of them. A circuit of some kind may be provided at a position facing the driving circuit 541 across the substrate.

[0064] The display panels 500 shown in FIG. 8A are arranged substantially parallel to each other and are driven by p (p is a number) of electrodes whose potentials are controlled by the driving circuit 542A and / or the driving circuit 542B. (a natural number of 1 or more) and the wirings 544 are arranged substantially parallel to each other and are connected to the driving circuit 541. Therefore, the wiring 545 has q (q is a natural number equal to or greater than 1) wires whose potentials are controlled. The pixel section 543 has a plurality of pixels 546 arranged in a matrix. , a pixel circuit and a display element.

[0065] In addition, three pixels (546) function as one pixel, achieving full color display. The three pixels 546 can each emit red, green, or blue light. The transmittance, reflectance, or emitted light amount is controlled. The colors are not limited to a combination of red, green, and blue, but may also be yellow, cyan, and magenta.

[0066] In addition to the pixels that control red light, green light, and blue light, a pixel 546 that controls white light is added. In this way, four pixels 546 may be grouped together to function as one pixel. By adding pixel 546, the brightness of the display area can be increased. The number of pixels 546 that function as a single pixel is increased, and red, green, blue, yellow, cyan, and magenta are appropriately combined. By using them in combination, the reproducible color gamut can be expanded.

[0067] The wiring 544_g (g is a natural number between 1 and p) in the gth row is Among the pixels 546 arranged in rows and columns q, q pixels 546 arranged in rows g are electrically connected to Also, the wiring 545_h (h is a natural number between 1 and q) in the h-th column is Among the pixels 546 arranged in rows and columns q, p pixels 546 arranged in columns h are electrically connected. To be continued.

[0068] The display panel 500 may take a variety of forms or have a variety of display elements. An example of a display element is an EL (electroluminescence) element (organic EL element). EL elements, inorganic EL elements, or EL elements containing organic and inorganic materials) Some have display media that change brightness, etc.

[0069] A pixel 546A shown in FIG. 8B includes a transistor 461, a capacitor 463, and a transistor a resistor 468, a transistor 464, and a light-emitting element 426 that can function as a display element; It has.

[0070] One of the source electrode and the drain electrode of the transistor 461 is electrically connected to the wiring 545_h. Furthermore, the gate electrode of the transistor 461 is electrically connected to the wiring 544_g. A video signal is supplied from the wiring 545_h.

[0071] The transistor 461 has a function of controlling writing of a video signal to a node 465. do.

[0072] One of a pair of electrodes of the capacitor 463 is electrically connected to the node 465, and the other is The source electrode and the drain electrode of the transistor 461 are electrically connected to the gate 467. The other of the electrodes is electrically connected to node 465 .

[0073] The capacitor 463 functions as a storage capacitor for storing data written to the node 465. Possess the ability.

[0074] One of the source electrode and the drain electrode of the transistor 468 is connected to the potential supply line VL_a. The other end is electrically connected to node 467. The gate electrode of 68 is electrically connected to node 465 .

[0075] One of the source electrode and the drain electrode of the transistor 464 is electrically connected to the wiring V0. The other end is electrically connected to a node 467. The gate electrode is electrically connected to a wiring 544_g.

[0076] One of the anode and cathode of the light emitting element 426 is electrically connected to the potential supply line VL_b. and the other is electrically connected to node 467.

[0077] The light emitting element 426 may be, for example, an organic electroluminescence element (also known as an organic EL element). However, the light-emitting element 426 is not limited to this. For example, an inorganic EL element made of an inorganic material may be used.

[0078] For example, a high power supply potential VDD is applied to one of the potential supply lines VL_a and VL_b. is applied to one side, and the other side is applied to the low power supply potential VSS.

[0079] In the display panel 500 having the pixel 546A in FIG. 8B, the driver circuit 542A and / or the driving circuit 542B sequentially selects the pixels 546 in each row, and the transistors 461, is turned on to write the video signal to node 465.

[0080] The pixel 546A, to which data is written at the node 465, is connected to the transistor 461 and the transistor The transistor 464 is turned off, which results in a holding state. A current flows between the source and drain electrodes of transistor 468 in accordance with the potential of the input data. The amount of current flowing through the light emitting element 426 is controlled, and the light emitting element 426 emits light with a brightness according to the amount of current flowing through the light emitting element 426. By sequentially performing the above for each row, an image can be displayed.

[0081] In addition, the transistors 461, 464, and 468 are A transistor having a back gate may be used. In this case, the transistor 461 The gates of the transistor 464 and the transistor 468 are electrically connected to the back gate. It may be done.

[0082] The above-mentioned transistors 461, 464, and 468 As described above, an OS transistor is preferably used. The off-state current is extremely low. Therefore, the potential of the data once written to the node 465 is maintained. Therefore, when displaying the same image, the frequency of writing data is A certain refresh rate can be reduced to reduce power consumption.

[0083] In addition, the OS transistor uses low-temperature polysilicon (L When using TPS (Low Temperature Poly-Silicon) Therefore, the heat resistance of the substrate on which the transistor is formed is improved. The temperature can be lowered, and the range of materials to be selected can be expanded. Thin base materials such as polyimide can be selected as the resin layer, which is only a few micrometers thick, making it possible to reduce the weight of the display panel and In addition, the display panel can be easily bent.

[0084] In addition, the organic EL element, which is the light emitting element 426, has a better response speed at low temperatures than the liquid crystal element. When a display panel is applied to an automobile, the range of environmental temperatures in which the display panel is used is wide. Even in such a case, the display panel using the organic EL element as the light emitting element is a display product. This can suppress the decline in quality.

[0085] In addition, display panels that use organic EL elements as light-emitting elements have a higher viewing angle than LCD panels. The change in brightness due to the difference in viewing angle is small. When applying this technology to automobiles, it is necessary to ensure that information on meters and other devices is displayed correctly without blurring. It is possible to do so.

[0086] <Example of application of display system to a moving object> The display panel applicable to the above-mentioned display system is adapted depending on the shape of the surface to which it is attached. Below, we will explain an example of application to the area around the driver's seat of a moving vehicle, such as an automobile. Reveal.

[0087] For example, Fig. 9 is a diagram showing the area around the windshield in the interior of a car. In addition to the display panels 51A to 51C attached to the dashboard, 10 shows a display panel 51D in which the display panel 51D is mounted.

[0088] The display panels 51A to 51C display navigation information, a speedometer, and a tachometer. It can provide various information such as mileage, fuel level, gear status, air conditioning settings, and more. In addition, the display items and layout displayed on the display panel can be adjusted to suit the user's preferences. The display panel can be changed as needed to suit the needs of the user, enhancing the design. 51A to 51C can also be used as lighting devices.

[0089] The display panel 51D displays an image captured by an imaging means provided on the vehicle body. This system can complement the blind spot (blind spot) that is blocked by the pillar. By displaying images from the imaging means, blind spots can be compensated for and safety can be improved. In addition, by projecting an image that complements the invisible parts, it becomes possible to achieve a more natural and unnatural appearance. The display panel 51D can also be used as a lighting device. is.

[0090] FIG. 10 shows the interior of a car with bench seats for the driver and passenger. In FIG. 10, a display panel 52A is provided in the door section, and a display panel 52B is provided in the steering wheel. 2B shows a display panel 52C provided in the center of the seat surface of the bench seat.

[0091] The display panel 52A displays an image from an imaging means provided on the vehicle body, for example. By extending it, you can compensate for the view that is blocked by the door.

[0092] Display panels 52B and 52C display navigation information, speedometer, and tachometer. meters, mileage, fuel amount, gear status, air conditioning settings, and various other information In addition, the display items and layout displayed on the display panel can be The display panels 52B and 52C can be changed as needed to suit the user's preferences. It can also be used as a lighting device.

[0093] As shown in Figures 9 and 10, display panels are placed in various locations inside the vehicle. When using the panel as a lighting device, it is also effective to use it as a means of transmitting an emergency signal to the outside of the vehicle. For example, if the health condition of the user (driver) is detected by a sensor, the brightness of the display panel will The display panel in the display system according to one aspect of the present invention is a display panel in a vehicle. It can be installed anywhere, so compared to text information or hazard lights, it provides less information to the surrounding area. Can communicate information effectively.

[0094] The display system according to one aspect of the present invention, such as the display panel described above, is attached to a curved surface. For example, the above-mentioned display panels 51A to 51D and the display panel 5 2A to 52C, they can be installed anywhere inside the car. That is, the curved surface such as the dashboard 12 and pillar 15 shown in FIG. 11(A) Therefore, as shown in FIG. 11(B), the window portion 61 and the like can be mounted. It is also possible to provide the display panel 60 on the inner surface of the outer vehicle body. By doing so, it is possible to display an image of the outside of the vehicle other than the window portion 61, thereby compensating for blind spots and improving safety. It can improve sexuality.

[0095] As shown in FIG. 11(B), a display panel is provided on the surface inside the vehicle body other than the window portion 61. In this case, as shown in FIG. 12(A), a plurality of image capturing devices 71L to 73L are installed on the outside of the vehicle body. , 71R to 73R are provided. This is preferable because it also provides information about the distance to the object.

[0096] By using the configurations shown in FIG. 11(B) and FIG. 12(A), as shown in FIG. 12(B), It is possible to display an image of the outside of the car other than the window portion 61. Therefore, it is possible to compensate for the blind spot of the user and improve safety. This makes it possible to provide a mobile body with improved performance.

[0097] In addition, in the case of a configuration in which the display panel 60 is provided on the surface inside the vehicle body other than the window portion 61, By placing a display panel in the In this case, you can freely switch the display position, so it is easy to see even in direct sunlight. This will be a countermeasure in case the situation worsens.

[0098] <Example of a moving object> An example of a moving object will be described.

[0099] A display system according to one aspect of the present invention has a surface on which a display panel can be provided. Specific examples of these moving bodies are shown in Figures 13(A) to 13(D). vinegar.

[0100] Fig. 13(A) shows an automobile 301. The automobile 301 has a window portion 311. The moving object according to one embodiment can be used in an automobile 301 having a window 311. The display panel applied to the stem can be provided on the surface inside the automobile 301. By configuring the display panel in the car 301, an image outside the car 301 is displayed. Therefore, the automobile 301 can be configured to reduce blind spots other than the window portion 311. can be done.

[0101] 13B shows the bus 302. The bus 302 has a window portion 311. The vehicle according to the present invention can be used for a bus 302 having a window 311. A display panel using this method can be provided on the surface of the bus 302. By doing so, an image outside the bus 302 can be displayed on the display panel inside the bus 302. Therefore, the bus 302 can be constructed with reduced blind spots other than the window portion 311.

[0102] 13(C) shows a train 303. The train 303 has a window 311. The moving body according to the present invention can be used for a train 303 having a window 311. The display panel using this method can be installed on the surface inside the train 303. By doing so, an image outside the train 303 can be displayed on the display panel inside the train 303. Therefore, the train 303 can be constructed with reduced blind spots other than at the window 311.

[0103] Fig. 13(D) shows an airplane 304. The airplane 304 has a window 311. The moving object according to one embodiment can be used in an airplane 304 having a window 311. The display panel using the stem can be provided on the surface inside the airplane 304. By configuring the display panel in the airplane 304, an image outside the airplane 304 is displayed. Therefore, the airplane 304 can be made with reduced blind spots other than the window portion 311. can be done.

[0104] <Additional notes regarding the present specification etc.> In this specification, the ordinal numbers "first," "second," and "third" are used to avoid confusion of constituent elements. Therefore, the number of components is not limited. , the order of the components is not limited.

[0105] In this specification and the like, in the block diagram, components are classified by function and are separated into blocks independent of each other. However, in actual circuits, components are switched according to their functions. It is difficult to separate the functions, and when multiple functions are involved in one circuit, or when multiple circuits are involved, Therefore, the blocks in the block diagram may be different from those described in the specification. The components are not limited to those mentioned above, but may be rephrased appropriately depending on the situation.

[0106] In the drawings, elements that are the same or have similar functions, elements that are made of the same material, or In some cases, the same reference numerals may be used to designate elements that are formed at the same time, and repeated explanations thereof will be omitted. It may be omitted.

[0107] In this specification and the like, when describing the connection relationship of a transistor, The first electrode or the first terminal is referred to as the "source or drain" (or the first electrode or the first terminal). The other of the source and drain is referred to as the "other of the source or drain" (or second electrode, or second terminal). This means that the source and drain of a transistor are This is because the names of the source and drain of a transistor change depending on the operating conditions. In this case, the term source (drain) terminal, source (drain) electrode, etc. may be used appropriately depending on the situation. It can be replaced.

[0108] In this specification and the like, the terms voltage and potential can be interchanged as appropriate. It is the potential difference from the reference potential. For example, the reference potential is the ground potential (earth potential). If we use the term "potential"), we can translate voltage into potential. Ground potential is not necessarily 0V. It does not necessarily mean that the potential is relative, and depending on the reference potential, The potential applied to wiring etc. may be changed.

[0109] In this specification, a switch refers to a device that can be in a conducting state (ON state) or a non-conducting state (OFF state). It refers to a device that has the function of controlling whether or not current flows by entering a state where it is in a non-operating state. A switch is a device that has the function of selecting and switching a path through which a current flows.

[0110] For example, an electrical switch or a mechanical switch can be used. The switch is not limited to a specific one as long as it can control the current.

[0111] When a transistor is used as a switch, the "conduction state" of the transistor is This refers to a state in which the source and drain of a transistor can be considered to be electrically short-circuited. The "non-conducting state" of a transistor is when the source and drain of the transistor are electrically isolated. This refers to a state in which the transistor can be considered to be operating as a simple switch. In this case, the polarity (conductivity type) of the transistor is not particularly limited.

[0112] In this specification, "A and B are connected" does not mean that A and B are directly connected. In addition to those that are electrically connected, A and B are also included. Connected to means that there is an object that has some electrical effect between A and B. When this occurs, it refers to something that enables the transmission and reception of electrical signals between A and B. [Explanation of symbols]

[0113] 10 Mobile 11A Display panel 11B Display panel 11C Display Panel 11D Display Panel 12 Dashboard 13 Handle 14 Window section 15 Pillar 21 Display area 22 Hidden area 23 Bending section 24 pixel section 20A display panel 20B Display panel 21A display area 22A Hidden area 21B Display area 22B Hidden area 20C Display Panel 21C display area 22C Hidden area 23C Bending section 20D display panel 20 Display panel 25 Polarizing Plate 21D display area 22D hidden area 21E Display area 22E Hidden area 11 Display panel 30 Controller IC 31 Host Controller 32 Interface 33 Correction circuit 34 Timing Controller 35 Display driver IC 36 Memory circuit 37 Display Area Data S01 Step S02 Step S03 Step S04 Step 30A controller IC 32A interface 33A correction circuit 34A Timing Controller 35A Display Driver IC 36A memory circuit 37A Display area data 30B Controller IC 32B interface 33B Correction circuit 34B Timing Controller 35B Display Driver IC 36B Memory circuit 37B Display area data 90 Memory Cell Array 91 Word line driver circuit 92 Bit line driver circuit 93 Capacitor OS1 transistor OS2 transistor OS3 transistor M1 transistor M2 transistor MC_A memory cell MC_B memory cell MC_C memory cell MC_D memory cell MC_E memory cell 500 display panel 541 Drive Circuit 542A driver circuit 542B driver circuit 543 Pixel section 544 Wiring 545 Wiring 546 pixels 546A pixel 461 Transistor 463 Capacitor 468 transistors 464 transistors 426 Light-emitting element 545_h wiring 544_g Wiring 51A Display Panel 51B Display Panel 51C Display Panel 51D Display Panel 52A Display Panel 52B Display Panel 52C Display Panel 60 Display Panel 61 Window 71L Imaging device 72L imaging device 73L Imaging Device 71R imaging device 72R imaging device 73R imaging device 301 Automobiles 302 Bus 303 Train 304 Airplane 311 Window

Claims

[Claim 1] a display panel, a correction circuit, and a memory circuit; the display panel is flexible; the display panel has a display area and a non-display area, the memory circuit has a function of storing first information regarding the display area and second information regarding the non-display area; the memory circuit has a plurality of memory cells; the memory cell includes a capacitor and a transistor including an oxide semiconductor in a semiconductor layer; the non-display area has an area that overlaps with the display area by folding the display panel, The display system according to claim 1, wherein the correction circuit has a function of generating image data to be written to pixels in the display area based on the first information and the second information.

Images