Indication device
The display device addresses high-definition and luminance challenges by dividing the panel into areas with specific light sources and synchronized wavelength emission, enhancing resolution and luminance while reducing costs.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- JAPAN DISPLAY INC
- Filing Date
- 2024-12-24
- Publication Date
- 2026-07-06
Smart Images
Figure 2026111811000001_ABST
Abstract
Description
Technical Field
[0001] Embodiments of the present invention relate to a display device.
Background Art
[0002] For example, in a display device applied to a head-mounted display, there is an increasing demand for high definition. However, when the pixel size is reduced, the ratio of the area of the light-shielding layer that partitions the pixels to the area of the pixel aperture increases, resulting in a decrease in the luminance of the pixels. Also, as the number of pixels increases, time is required to write video signals to many pixels, shortening the time during which an image can be displayed, and as a result, causing a decrease in the luminance of the pixels. On the other hand, in order to write video signals to many pixels within a limited time, a driver with high processing power is required, leading to an increase in cost.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] One of the objectives of the embodiments is to provide a display device capable of improving display quality.
Means for Solving the Problems
[0005] According to an embodiment, the display device is The display area for displaying an image includes a liquid crystal panel having a first area having a plurality of first pixels and a second area having a plurality of second pixels, an illumination device configured to illuminate the liquid crystal panel, and a control unit that controls the liquid crystal panel and the illumination device, wherein each of the plurality of first pixels is equipped with a color filter, and none of the plurality of second pixels are equipped with a color filter, and the illumination device includes a second light source unit comprising a first light source unit configured to emit white illumination light toward the first area, a first light-emitting element configured to emit illumination light in a first wavelength range toward the second area, and a second light-emitting element configured to emit illumination light in a second wavelength range different from the first wavelength range toward the second area, and the control unit controls the display of a first color image in the first wavelength range in the second area in synchronization with the lighting up of the first light-emitting element, and the display of a second color image in the second wavelength range in the second area in synchronization with the lighting up of the second light-emitting element. [Brief explanation of the drawing]
[0006] [Figure 1] Figure 1 is a perspective view showing an example of the appearance of the head-mounted display 1. [Figure 2] Figure 2 is a diagram illustrating the configuration of the display device DSP. [Figure 3] Figure 3 is a diagram illustrating the positional relationship between the display devices DSP1 and DSP2 and the user's eyes. [Figure 4] Figure 4 is a plan view illustrating the configuration of a liquid crystal panel (PNL). [Figure 5] Figure 5 is a cross-sectional view showing one example of a liquid crystal panel PNL configuration along the A-B line in Figure 4. [Figure 6] Figure 6 shows an example of the configuration of a lighting device (IL). [Figure 7] Figure 7 is a diagram illustrating an example of control for a display device DSP. [Figure 8] Figure 8 shows another example of the configuration of the lighting device IL. [Figure 9] Figure 9 shows another example of the configuration of the lighting device IL. [Figure 10] Figure 10 shows an example of a pixel layout configuration in the display area DA. [Figure 11] Figure 11 shows another example of a pixel layout configuration in the display area DA. [Figure 12] Figure 12 shows another example of a pixel layout configuration in the display area DA. [Figure 13] Figure 13 shows another example of a pixel layout configuration in the display area DA. [Modes for carrying out the invention]
[0007] The embodiments will be described below with reference to the drawings. The disclosure is merely an example, and any modifications that a person skilled in the art could easily conceive of while maintaining the intent of the disclosure are naturally included within the scope of this disclosure. Furthermore, while drawings may schematically represent the width, thickness, shape, etc., of parts in a manner that is clearer than the actual embodiment, they are merely examples and do not limit the interpretation of this disclosure. In addition, in this specification and in each drawing, components that perform the same or similar functions as those described above in previously shown drawings are denoted by the same reference numerals, and redundant detailed explanations may be omitted as appropriate.
[0008] Furthermore, the drawings will include mutually orthogonal X, Y, and Z axes as needed to facilitate understanding. The direction along the X-axis will be referred to as the first direction X, the direction along the Y-axis as the second direction Y, and the direction along the Z-axis as the third direction Z. Viewing various elements parallel to the third direction Z is called a plan view. In addition, terms referring to the positional relationship between two or more constituent elements, such as above, above, between, and opposite, include not only cases where the two or more constituent elements of the object are in direct contact, but also cases where they are separated from each other by gaps or other constituent elements.
[0009] Figure 1 is a perspective view showing an example of the appearance of the head-mounted display 1.
[0010] The head-mounted display 1 is, for example, worn on the head of the user USR. The head-mounted display 1 is used to provide, for example, virtual reality or augmented reality to the user USR.
[0011] The head-mounted display 1 includes a display device DSP1 for the right eye and a display device DSP2 for the left eye. The display device DSP1 is arranged to be located in front of the right eye of the user USR when the user USR wears the head-mounted display 1 on the head. The display device DSP2 is arranged to be located in front of the left eye of the user USR when the user USR wears the head-mounted display 1 on the head.
[0012] The display device DSP1 and the display device DSP2 have substantially the same configuration. Hereinafter, the display device DSP applicable to each of the display device DSP1 and the display device DSP2 will be described.
[0013] FIG. 2 is a diagram for explaining the configuration of the display device DSP.
[0014] The display device DSP includes a lighting device IL, an optical sheet OS, a liquid crystal panel PNL, a projection optical system PO, and a control unit CNT. The control unit CNT is configured to control the lighting device IL and the liquid crystal panel PNL.
[0015] The lighting device IL is arranged behind the liquid crystal panel PNL and is configured to illuminate the liquid crystal panel PNL. The lighting device IL includes, for example, a plurality of light-emitting elements LD and a light guide plate LG. In the lighting device IL, the light guide plate LG may be omitted.
[0016] <000009The plurality of light-emitting elements LD includes a light-emitting element LD0, a light-emitting element LD1, a light-emitting element LD2, and a light-emitting element LD3. The light-emitting element LD0 is configured to emit white illumination light. The light-emitting element LD1 is configured to emit illumination light in the first wavelength range. The light-emitting element LD2 is configured to emit illumination light in the second wavelength range. The light-emitting element LD3 is configured to emit illumination light in the third wavelength range.
[0017] The first wavelength range, the second wavelength range, and the third wavelength range are different from each other. For example, the second wavelength range has a longer wavelength than the first wavelength range, and the third wavelength range has a longer wavelength than the second wavelength range. More specifically, the first wavelength range is 400 nm to 500 nm, and the color of the first wavelength range is blue. The second wavelength range is 500 nm to 600 nm, and the color of the second wavelength range is green. The third wavelength range is 600 nm to 700 nm, and the color of the third wavelength range is red.
[0018] As an example of the light-emitting element LD, the light-emitting element LD1, the light-emitting element LD2, and the light-emitting element LD3 are light-emitting diodes. Note that the light-emitting element LD is not limited to a light-emitting diode, and may be a laser diode having higher directivity than a light-emitting diode. Also, a light-emitting element LD and a wavelength conversion element may be combined to obtain illumination light in a desired wavelength range.
[0019] These light-emitting elements LD are driven by a light source driver DrL. The light source driver DrL is controlled by a control unit CNT.
[0020] The liquid crystal panel PNL includes a first substrate SUB1, a second substrate SUB2, a liquid crystal layer LC, a polarizing plate PL1, and a polarizing plate PL2. The liquid crystal layer LC is disposed between the first substrate SUB1 and the second substrate SUB2. The polarizing plate PL1 is adhered to the first substrate SUB1. The polarizing plate PL2 is adhered to the second substrate SUB2.
[0021] Such a liquid crystal panel PNL is driven by a panel driver DrP. The panel driver DrP is controlled by a control unit CNT.
[0022] Multiple optical sheets OS are placed between the illumination device IL and the liquid crystal panel PNL. The optical sheets OS include, for example, prism sheets and diffusion sheets.
[0023] The projection optical system PO is positioned between the user's observation position O and the liquid crystal panel PNL, and is configured to project the image displayed on the liquid crystal panel PNL toward the user's eye E. The projection optical system PO is composed of various optical elements. For example, the projection optical system PO is an optical system sometimes called a pancake optical system, which has at least two reflective surfaces and has the function of folding the optical path twice.
[0024] Figure 3 is a diagram illustrating the positional relationship between the display devices DSP1 and DSP2 and the user's eyes.
[0025] The liquid crystal panel PNL1 of the display device DSP1 is positioned in front of the user's right eye RE, and the liquid crystal panel PNL2 of the display device DSP2 is positioned in front of the user's left eye LE. In this specification, the direction in which liquid crystal panels PNL1 and PNL2 are aligned is defined as the first direction X, and the direction that intersects or is perpendicular to the first direction X in a plane parallel to liquid crystal panels PNL1 and PNL2 is defined as the second direction Y.
[0026] In each of the liquid crystal panels PNL1 and PNL2, the display area DA for displaying images comprises a first area A1, a second area A2, and a third area A3. The second area A2 is configured to display images with higher resolution compared to the first area A1 and the third area A3. The resolution of the first area A1 is equivalent to that of the third area A3. In other words, the first area A1 and the third area A3 correspond to low-resolution display areas, while the second area A2 corresponds to a high-resolution display area.
[0027] In the liquid crystal panel PNL1, the first region A1, the second region A2, and the third region A3 are arranged in this order in the direction of the arrow indicating the first direction X. The third region A3 in the liquid crystal panel PNL1 is closer to the user's nose NS or the liquid crystal panel PNL2 than the first region A1 and the second region A2.
[0028] In the liquid crystal panel PNL2, the third region A3, the second region A2, and the first region A1 are arranged in this order in the direction of the arrow indicating the first direction X. The third region A3 in the liquid crystal panel PNL2 is closer to the user's nose NS or the liquid crystal panel PNL1 than the first region A1 and the second region A2.
[0029] The first region A1 has a width W1, the second region A2 has a width W2, and the third region A3 has a width W3. Here, widths W1, W2, and W3 all correspond to widths along the first direction X. Width W1 is different from width W3. Here, the width W3 of the third region A3, which is closer to the nose NS, is smaller than the width W1 of the first region A1, which is further from the nose NS (W1 > W3). Therefore, the second region A2 is located closer to the nose NS than to the center of the display region DA. In the illustrated example, the second region A2 of liquid crystal panel PNL1 is located in front of the right eye RE, and the second region A2 of liquid crystal panel PNL2 is located in front of the left eye LE.
[0030] Incidentally, in the human eyeball, the fovea region has a high density of cone cells, which have high resolution and color discrimination function but low sensitivity, while the area outside the fovea has a high density of rod cells, which have low resolution and no color discrimination function but high sensitivity.
[0031] The fovea is located offset from the optical axis of the ocular optics. In the right eye, the fovea is known to be located a few degrees to the right of the center, while in the left eye, the fovea is located a few degrees to the left of the center.
[0032] When providing virtual reality or similar content using a head-mounted display, the position of the display device DSP and the user's eyeballs are very close together. Therefore, it is assumed that when the user changes their gaze position, there will be no significant shift in viewpoint, and the position of the ocular optics and fovea relative to the display device DSP will remain fixed.
[0033] Therefore, as shown in the diagram, the second region A2, which corresponds to the high-resolution display area, is located closer to the nose NS than to the central part of the display area DA. This makes it possible to provide high-resolution images to the high-resolution cone cells in the fovea, while providing low-resolution images to the low-resolution rod cells located outside the fovea.
[0034] In the example shown in Figure 3, both liquid crystal panels PNL1 and PNL2 have a rectangular planar shape, but they may have other polygonal or circular planar shapes. Furthermore, liquid crystal panels PNL1 and PNL2 may have notches to avoid contact with the nose NS.
[0035] Figure 4 is a plan view illustrating the configuration of the liquid crystal panel PNL. The liquid crystal panel PNL shown here corresponds to liquid crystal panel PNL1, but if the left and right sides of the illustrated liquid crystal panel PNL are reversed, it corresponds to liquid crystal panel PNL2.
[0036] In a plan view, the first substrate SUB1 and the second substrate SUB2 are superimposed on each other and bonded together by a seal SE. The liquid crystal layer LC is sealed between the first substrate SUB1 and the second substrate SUB2 by a seal SE.
[0037] A liquid crystal panel (PNL) has a display area DA for displaying an image in a region where the liquid crystal layer (LC) is sealed. The display area DA comprises a plurality of pixels PX arranged in a matrix in a first direction X and a second direction Y. Specifically, the first area A1 comprises a plurality of pixels PX1 arranged in a matrix. The second area A2 comprises a plurality of pixels PX2 arranged in a matrix. The third area A3 comprises a plurality of pixels PX3 arranged in a matrix. In the display area DA, the plurality of pixels PX1, a plurality of pixels PX2, and a plurality of pixels PX3 are arranged in order in the first direction X.
[0038] As shown in the enlarged view in the figure, each of the pixels PX1, PX2, and PX3 is equipped with a switching element SW, a pixel electrode PE, a common electrode CE, etc. The switching element SW is composed of, for example, a thin-film transistor (TFT) and is electrically connected to the scan line G and the signal line S.
[0039] The scan line G extends in the first direction X across the first region A1, the second region A2, and the third region A3, and is electrically connected to the switching element SW at each of the multiple pixels PX aligned in the first direction X. The signal line S extends in the second direction Y, intersects with the scan line G, and is electrically connected to the switching element SW at each of the multiple pixels PX aligned in the second direction Y.
[0040] The pixel electrodes PE are electrically connected to the switching element SW. Each pixel electrode PE faces a common electrode CE, and the liquid crystal layer LC is driven by the electric field generated between the pixel electrode PE and the common electrode CE. Capacitance CS is formed, for example, between an electrode at the same potential as the common electrode CE and an electrode at the same potential as the pixel electrode PE.
[0041] In the illustrated example, the IC chip CP and flexible printed circuit board FP for driving the liquid crystal panel PNL are mounted on the first board SUB1. The IC chip CP may also be mounted on the flexible printed circuit board FP. The panel driver DrP shown in Figure 2 includes a signal line driver that applies a voltage corresponding to the video signal to each of the signal lines S, and a scan line driver that applies a voltage corresponding to the control signal to each of the scan lines G. Such a panel driver DrP is, for example, integrated into the IC chip CP.
[0042] Figure 5 is a cross-sectional view showing one example of a liquid crystal panel PNL configuration along the A-B line in Figure 4.
[0043] The first substrate SUB1 comprises a transparent substrate 10, a circuit layer 11, a common electrode CE, an insulating layer 12, a plurality of pixel electrodes, and an alignment film AL1.
[0044] The circuit layer 11 includes the scan lines, signal lines, switching elements, various insulating films, etc. The common electrode CE is positioned between the circuit layer 11 and the insulating layer 12 and extends across the first region A1, the second region A2, and the third region A3.
[0045] Multiple pixel electrodes, namely pixel electrodes PE11 to PE13 located on pixel PX1, pixel electrodes PE21 to PE26 located on pixel PX2, and pixel electrodes PE31 to PE33 located on pixel PX3, are arranged on an insulating layer 12 and covered with an alignment film AL1. The common electrode CE overlaps the pixel electrodes PE11 to PE13, pixel electrodes PE21 to PE26, and pixel electrodes PE31 to PE33 in the third direction Z, via the insulating layer 12.
[0046] Multiple pixel electrodes and a common electrode CE are transparent electrodes formed from a conductive oxide such as indium tin oxide (ITO). The insulating layer 12 is an interlayer insulating film formed from an inorganic insulating material such as silicon nitride. The alignment film AL1 is in contact with the liquid crystal layer LC.
[0047] The second substrate SUB2 comprises a transparent substrate 20, a black matrix 21, color filters CF1 to CF3, a transparent resin layer TR, an overcoat layer 22, and an alignment film AL2.
[0048] The black matrix 21 is positioned between adjacent pixels PX1 in the first region A1, and between adjacent pixels PX3 in the third region A3. On the other hand, the black matrix 21 is not positioned between adjacent pixels PX2 in the second region A2.
[0049] Color filters CF1 to CF3 are colored with different colors from each other. For example, color filter CF1 is colored with a color in the first wavelength range (e.g., blue), color filter CF2 is colored with a color in the second wavelength range (e.g., green), and color filter CF3 is colored with a color in the third wavelength range (e.g., red).
[0050] Pixel PX1 in the first region A1 is equipped with color filters CF1 to CF3, and pixel PX3 in the third region A3 is also equipped with color filters CF1 to CF3. On the other hand, pixel PX2 in the second region A2 is not equipped with any of the color filters CF1 to CF3.
[0051] For example, in the first region A1, color filter CF1 overlaps with pixel electrode PE11 in the third direction Z. Similarly, color filter CF2 overlaps with pixel electrode PE12, and color filter CF3 overlaps with pixel electrode PE13.
[0052] Furthermore, in the third region A3, color filter CF1 overlaps with pixel electrode PE31 in the third direction Z. Similarly, color filter CF2 overlaps with pixel electrode PE32, and color filter CF3 overlaps with pixel electrode PE33.
[0053] The transparent resin layer TR is located in the second region A2 instead of the color filters CF1 to CF3. In other words, the pixels PX2 in the second region A2 are equipped with the transparent resin layer TR. In the illustrated example, the transparent resin layer TR and the color filters CF1 to CF3 are in contact with the transparent substrate 20. In the second region A2, the transparent resin layer TR overlaps the pixel electrodes PE21 to PE26 in the third direction Z. On the other hand, the transparent resin layer TR is not located in the first region A1 and the third region A3.
[0054] The overcoat layer 22 covers the color filters CF1 to CF3 and the transparent resin layer TR. This overcoat layer 22 is made of a transparent resin material and corresponds to a planarization layer for planarizing the surface facing the liquid crystal layer LC across the first region A1, the second region A2, and the third region A3.
[0055] The alignment film AL2 covers the overcoat layer 22. The alignment film AL2 is in contact with the liquid crystal layer LC.
[0056] Note that the color filters CF1 to CF3 are not limited to the illustrated example and may be provided on the first substrate SUB1. Also, the common electrode CE is not limited to the illustrated example and may be provided on the second substrate SUB2.
[0057] Figure 6 shows an example of the configuration of a lighting device (IL).
[0058] The lighting device IL comprises a light guide plate LG1, a light guide plate LG2, a light source unit LS1, and a light source unit LS2.
[0059] Each of the light guide plates LG1 and LG2 is formed in a flat plate shape having a main surface (top surface) aligned with the XY plane defined by the first direction X and the second direction Y. In the third direction Z, light guide plate LG2 overlaps with light guide plate LG1. Light guide plate LG2 is located between the liquid crystal panel PNL and light guide plate LG1. Furthermore, each of the light guide plates LG1 and LG2 overlaps with the first region A1, the second region A2, and the third region A3 of the liquid crystal panel PNL in the third direction Z. An optical sheet OS, as shown in Figure 2, is interposed between light guide plate LG2 and the liquid crystal panel PNL, but its illustration is omitted here.
[0060] The light guide plate LG1 has a side surface S1. Side surface S1 is a surface parallel to the YZ plane, for example, defined by the second direction Y and the third direction Z. The light guide plate LG2 has a side surface S2. Side surface S2 is a surface parallel to the YZ plane, for example. When the light guide plates LG1 and LG2 are formed to the same dimensions, side surface S2 is located directly above side surface S1 in the third direction Z.
[0061] The light source unit LS1 faces the side surface S1 in the first direction X. The light source unit LS1 is equipped with multiple light-emitting elements LD0. The multiple light-emitting elements LD0 are arranged in the second direction Y. As described above, the light-emitting elements LD0 are configured to emit white illumination light.
[0062] The light source unit LS2 faces the side surface S2 in the first direction X and overlaps with the light source unit LS1 in the third direction Z. The light source unit LS2 comprises a plurality of light-emitting elements LD1, a plurality of light-emitting elements LD2, and a plurality of light-emitting elements LD3. One light-emitting element LD1, one light-emitting element LD2, and one light-emitting element LD3 are arranged in the second direction Y. As described above, the light-emitting element LD1 is configured to emit illumination light in the first wavelength range, the light-emitting element LD2 is configured to emit illumination light in the second wavelength range, and the light-emitting element LD3 is configured to emit illumination light in the third wavelength range.
[0063] The light guide plate LG1 has prism sections P11 and P12, and a flat section F1 located between prism sections P11 and P12. In the third direction Z, prism section P11 overlaps with the first region A1, flat section F1 overlaps with the second region A2, and prism section P12 overlaps with the third region A3. Each of the prism sections P11 and P12 is a region in which multiple prisms are arranged, and has the function of reflecting illumination light propagating through the light guide plate LG1 toward the liquid crystal panel PNL. The flat section F1 is a region having a plane parallel to the XY plane.
[0064] The light guide plate LG2 has flat sections F11 and F12, and a prism section P2 located between the flat sections F11 and F12. In the third direction Z, the flat section F11 overlaps with the first region A1 and the prism section P11, the prism section P2 overlaps with the second region A2 and the flat section F1, and the flat section F12 overlaps with the third region A3 and the prism section P12. The prism section P2 is a region in which multiple prisms are arranged and has the function of reflecting illumination light propagating through the light guide plate LG2 toward the liquid crystal panel PNL. The flat sections F11 and F12 are regions having planes parallel to the XY plane.
[0065] In such a lighting device IL, when the light-emitting element LD0 of the light source unit LS1 is lit, the illumination light L0 emitted from the light-emitting element LD0 toward the side surface S1 propagates through the light guide plate LG1, is reflected by the prism unit P11, and is also reflected by the prism unit P12. The illumination light L0 reflected by the prism unit P11 passes through the flat unit F11 and illuminates the first region A1. The illumination light L0 reflected by the prism unit P12 passes through the flat unit F12 and illuminates the third region A3.
[0066] In other words, the light source unit LS1 is configured to emit illumination light L0 toward the first region A1 and the third region A3 by utilizing the function of the light guide plate LG1.
[0067] Furthermore, in the lighting device IL, when the light-emitting element LD1 of the light source unit LS2 is lit, the illumination light (e.g., blue light) L1 in the first wavelength range emitted from the light-emitting element LD1 toward the side S2 propagates through the light guide plate LG2 and is reflected by the prism unit P2. The illumination light L1 reflected by the prism unit P2 illuminates the second region A2.
[0068] Similarly, when the light-emitting element LD2 is lit, the illumination light (e.g., green light) L2 in the second wavelength range emitted from the light-emitting element LD2 toward the side S2 propagates through the light guide plate LG2 and is reflected by the prism section P2. The illumination light L2 reflected by the prism section P2 illuminates the second region A2.
[0069] Similarly, when the light-emitting element LD3 is lit, the illumination light (e.g., red light) L3 in the third wavelength range emitted from the light-emitting element LD3 toward the side S2 propagates through the light guide plate LG2 and is reflected by the prism section P2. The illumination light L3 reflected by the prism section P2 illuminates the second region A2.
[0070] In other words, the light source unit LS2 is configured to emit illumination light L1, L2, and L3 toward the second region A2 by utilizing the function of the light guide plate LG2.
[0071] From the viewpoint of ensuring that the second region A2 is reliably illuminated by illumination lights L1, L2, and L3, it is desirable that the width W12 of the prism section P2 along the first direction X is greater than the width W2 of the second region A2. Also, from the viewpoint of preventing the illumination light emitted from the light source section LS1 from reaching the second region A2, it is desirable that the width W11 of the flat section F1 along the first direction X is greater than the width W2.
[0072] In the first region A1 of the above configuration, a color image can be displayed by selectively transmitting white illumination light L0 through pixels PX1, each equipped with color filters CF1 to CF3. In the third region A3, a color image can be displayed by selectively transmitting white illumination light L0 through pixels PX3, each equipped with color filters CF1 to CF3.
[0073] The second region A2 employs a field sequential color scheme. Specifically, the second region A2 can display a color image by sequentially and selectively transmitting illumination light L1 in the first wavelength range, illumination light L2 in the second wavelength range, and illumination light L3 in the third wavelength range to a single pixel PX2 that does not have a color filter.
[0074] In the example configuration shown in Figure 6, the light source unit LS2 and the light guide plate LG2 are arranged between the light guide plate LG1 and the liquid crystal panel PNL. However, the configuration is not limited to this arrangement, and the light source unit LS1 and the light guide plate LG1 may be arranged between the light guide plate LG2 and the liquid crystal panel PNL.
[0075] Figure 7 is a diagram illustrating an example of control for a display device DSP.
[0076] The horizontal axis in the figure represents time. The frame period F for displaying a color image in the display area DA of the liquid crystal panel PNL includes subframe periods SF1, SF2, and SF3.
[0077] In region A2, subframe period SF1 corresponds to the period for displaying the color image in the first wavelength range, subframe period SF2 corresponds to the period for displaying the color image in the second wavelength range, and subframe period SF3 corresponds to the period for displaying the color image in the third wavelength range.
[0078] In the first region A1 and the third region A3, each of the subframe periods SF1, SF2, and SF3 corresponds to the period required to display the same color image.
[0079] The control of writing video signals to each pixel and the drive control of the light-emitting elements, as described below, are performed by the control unit CNT shown in Figure 2.
[0080] The subframe period SF1 includes a period T11 for writing the video signal to the pixel PX and a period T12 for holding the video signal written to the pixel PX.
[0081] During period T11, among the pixels PX1 in the first region A1, the pixels PX1 that display colors in the first wavelength range (or pixels equipped with a color filter CF1) have a video signal corresponding to the color image in the first wavelength range written to them. Also, among the pixels PX1, the pixels PX1 that display colors in the second wavelength range (or pixels equipped with a color filter CF2) have a video signal corresponding to the color image in the second wavelength range written to them. Furthermore, among the pixels PX1, the pixels PX1 that display colors in the third wavelength range (or pixels equipped with a color filter CF3) have a video signal corresponding to the color image in the third wavelength range written to them.
[0082] During period T11, among the pixels PX3 in the third region A3, the pixels PX3 that display colors in the first wavelength range (or pixels equipped with color filter CF1) have a video signal corresponding to the color image in the first wavelength range written to them. Also, among the pixels PX3, the pixels PX3 that display colors in the second wavelength range (or pixels equipped with color filter CF2) have a video signal corresponding to the color image in the second wavelength range written to them. Furthermore, among the pixels PX3, the pixels PX3 that display colors in the third wavelength range (or pixels equipped with color filter CF3) have a video signal corresponding to the color image in the third wavelength range written to them.
[0083] During period T11, all pixels PX2 in the second region A2 are written with a video signal (first sub-video signal) corresponding to the color image in the first wavelength range.
[0084] Multiple light-emitting elements LD0 in the light source unit LS1 are illuminated at a predetermined duty cycle during period T12 to illuminate the first region A1 and the third region A3. Additionally, multiple light-emitting elements LD1 in the light source unit LS2 are illuminated at a predetermined duty cycle during period T12 to illuminate the second region A2.
[0085] The subframe period SF2 includes a period T21 for writing the video signal to the pixel PX and a period T22 for holding the video signal written to the pixel PX.
[0086] During period T21, each pixel PX1 of the first region A1 is written with the same video signal as the video signal written during period T11. During period T21, each pixel PX3 in the third region A3 is written with the same video signal as the one written during period T11.
[0087] During period T21, a video signal (second sub-video signal) corresponding to the color image in the second wavelength range is written to all pixels PX2 in the second region A2. The second sub-video signal written during period T21 may be different from the first sub-video signal written during period T11.
[0088] Multiple light-emitting elements LD0 are illuminated at a predetermined duty cycle during period T22 to illuminate the first region A1 and the third region A3. Additionally, multiple light-emitting elements LD2 are illuminated at a predetermined duty cycle during period T22 to illuminate the second region A2.
[0089] The subframe period SF3 includes a period T31 for writing the video signal to the pixel PX and a period T32 for holding the video signal written to the pixel PX.
[0090] During period T31, each pixel PX1 in the first region A1 is written with the same video signal as the one written during period T11. In other words, the same video signal is written to pixel PX1 three times during one frame period F.
[0091] During period T31, each pixel PX3 in the third region A3 receives the same video signal as the one written during period T11. In other words, the same video signal is written to pixel PX3 three times during one frame period F.
[0092] During period T31, a video signal (third sub-video signal) corresponding to a color image in the third wavelength range is written to all pixels PX2 in the second region A2. The third sub-video signal written during period T31 may differ from at least one of the first sub-video signal and the second sub-video signal.
[0093] Multiple light-emitting elements LD0 are illuminated at a predetermined duty cycle during period T32 to illuminate the first region A1 and the third region A3. Additionally, multiple light-emitting elements LD3 are illuminated at a predetermined duty cycle during period T32 to illuminate the second region A2.
[0094] The control unit CNT shown in Figure 2 controls the light source driver DrL and the panel driver DrP. Here, we will describe an example of control for displaying a color image in the second region A2.
[0095] The control unit CNT first controls the display of a color image in the first wavelength range in the second region A2 in synchronization with the illumination of multiple light-emitting elements LD1 during the subframe period SF1. At this time, multiple light-emitting elements LD2 and multiple light-emitting elements LD3 are all turned off. On the other hand, multiple light-emitting elements LD0 are illuminated simultaneously with light-emitting elements LD1.
[0096] Subsequently, during the subframe period SF2, the control unit CNT controls the display of a color image in the second wavelength range in the second region A2 in synchronization with the illumination of multiple light-emitting elements LD2. At this time, multiple light-emitting elements LD1 and multiple light-emitting elements LD3 are all turned off. On the other hand, multiple light-emitting elements LD0 are illuminated simultaneously with light-emitting elements LD2.
[0097] Subsequently, during the subframe period SF3, the control unit CNT controls the display of a color image in the third wavelength range in the second region A2 in synchronization with the illumination of the multiple light-emitting elements LD3. At this time, the multiple light-emitting elements LD1 and LD2 are all off. On the other hand, the multiple light-emitting elements LD0 are illuminated simultaneously with the light-emitting elements LD3.
[0098] This allows a color image to be displayed in the second region A2.
[0099] The first region A1 and the third region A3 are illuminated by the light-emitting element LD0, which is lit over subframe periods SF1, SF2, and SF3, respectively, and a color image can be displayed.
[0100] As explained above, in the first region A1 and the third region A3, a color image is displayed by three pixels equipped with color filters CF1 to CF3, whereas in the second region A2, a color image can be displayed by a single pixel by applying a field sequential color method. Therefore, for example, if pixel PX2 is the same size as pixels PX1 and PX3, the second region A2 can be made more detailed than the first region A1 and the third region A3. Moreover, the second region A2 does not have a color filter or a black matrix. Therefore, in pixel PX2, there is no light absorption by the color filter, and the area contributing to the display can be increased by omitting the black matrix. This makes it possible to improve the brightness per pixel of pixel PX2. Consequently, it is possible to improve the display quality.
[0101] Next, other configuration examples of the lighting device IL will be described. In the following configuration examples, the same reference numerals will be used for components identical to those in the above configuration examples, and redundant explanations may be omitted as appropriate.
[0102] Figure 8 shows another example of the configuration of the lighting device IL.
[0103] The lighting device IL comprises a light guide plate LG2, a light source unit LS1, a light source unit LS2, and a circuit board CSUB.
[0104] The light guide plate LG2 is formed in a flat plate shape with a main surface (top surface) aligned with the XY plane. The light guide plate LG2 is located between the liquid crystal panel PNL and the circuit board CSUB. Furthermore, in the third direction Z, the light guide plate LG2 overlaps the first region A1, the second region A2, and the third region A3 of the liquid crystal panel PNL.
[0105] The light source unit LS1 is positioned directly below the first region A1 and the third region A3 in the third direction Z. Multiple light-emitting elements LD0 of the light source unit LS1 are mounted on the circuit board CSUB and arranged in a matrix in the first direction X and the second direction Y. As described above, the light-emitting elements LD0 are configured to emit white illumination light.
[0106] The light source unit LS2 faces the side surface S2 of the light guide plate LG2 in the first direction X. One light-emitting element LD1, one light-emitting element LD2, and one light-emitting element LD3 in the light source unit LS2 are arranged in the second direction Y. As described above, the light-emitting element LD1 is configured to emit illumination light in the first wavelength range, the light-emitting element LD2 is configured to emit illumination light in the second wavelength range, and the light-emitting element LD3 is configured to emit illumination light in the third wavelength range.
[0107] The light guide plate LG2 has flat sections F11 and F12, and a prism section P2 located between the flat sections F11 and F12. In the third direction Z, the flat section F11 overlaps the first region A1 and the light source section LS1, the prism section P2 overlaps the second region A2, and the flat section F12 overlaps the third region A3 and the light source section LS1. The prism section P2 is a region in which multiple prisms are arranged and has the function of reflecting the illumination light propagating through the light guide plate LG2 toward the liquid crystal panel PNL.
[0108] In such an illumination device IL, when the light-emitting element LD0 of the light source unit LS1 is lit, the illumination light L0 emitted from the light-emitting element LD0 passes through the flat section F11 and illuminates the first region A1. The illumination light L0 also passes through the flat section F12 and illuminates the third region A3. In other words, the light source unit LS1 is configured to emit illumination light L0 toward the first region A1 and the third region A3.
[0109] Furthermore, in the lighting device IL, when the light-emitting element LD1 of the light source unit LS2 is lit, the illumination light (e.g., blue light) L1 in the first wavelength range emitted from the light-emitting element LD1 is reflected by the prism unit P2 and illuminates the second region A2. Similarly, when the light-emitting element LD2 is lit, the illumination light (e.g., green light) L2 in the second wavelength range emitted from the light-emitting element LD2 is reflected by the prism section P2 and illuminates the second region A2. Similarly, when the light-emitting element LD3 is lit, the illumination light (e.g., red light) L3 in the third wavelength range emitted from the light-emitting element LD3 is reflected by the prism section P2 and illuminates the second region A2. In other words, the light source section LS2 is configured to emit illumination light L1, L2, and L3 toward the second region A2 by utilizing the function of the light guide plate LG2.
[0110] From the viewpoint of ensuring that the second region A2 is reliably illuminated by illumination lights L1, L2, and L3, it is desirable that the width W12 of the prism section P2 along the first direction X is greater than the width W2 of the second region A2.
[0111] The same effects as in the above-described configuration example can be obtained in a display device that applies such a lighting device IL. Furthermore, compared to the configuration example shown in Figure 6, the light guide plate LG1 can be omitted, reducing the number of parts and lowering costs.
[0112] Figure 9 shows another example of the configuration of the lighting device IL.
[0113] The lighting device IL comprises a light source unit LS1, a light source unit LS2, and a circuit board CSUB.
[0114] The light source unit LS1 is positioned directly below the first region A1 and the third region A3 in the third direction Z. Multiple light-emitting elements LD0 of the light source unit LS1 are mounted on the circuit board CSUB and arranged in a matrix in the first direction X and the second direction Y. As described above, the light-emitting elements LD0 are configured to emit white illumination light.
[0115] The light source unit LS2 is positioned directly below the second region A2 in the third direction Z. The multiple light-emitting elements LD1, LD2, and LD3 of the light source unit LS2 are mounted on the circuit board CSUB and arranged in a matrix in the first direction X and the second direction Y. As described above, the light-emitting element LD1 is configured to emit illumination light in the first wavelength range, the light-emitting element LD2 is configured to emit illumination light in the second wavelength range, and the light-emitting element LD3 is configured to emit illumination light in the third wavelength range.
[0116] In such a lighting device IL, when the light-emitting element LD0 of the light source unit LS1 is lit, the illumination light L0 emitted from the light-emitting element LD0 illuminates the first region A1 and the third region A3. In other words, the light source unit LS1 is configured to emit illumination light L0 toward the first region A1 and the third region A3.
[0117] Furthermore, in the illumination device IL, when the light-emitting element LD1 of the light source unit LS2 is lit, the illumination light L1 in the first wavelength range (e.g., blue light) emitted from the light-emitting element LD1 illuminates the second region A2. Similarly, when the light-emitting element LD2 is lit, the illumination light L2 in the second wavelength range (e.g., green light) emitted from the light-emitting element LD2 illuminates the second region A2. Similarly, when the light-emitting element LD3 is lit, the illumination light L3 in the third wavelength range (e.g., red light) emitted from the light-emitting element LD3 illuminates the second region A2. In other words, the light source unit LS2 is configured to emit illumination lights L1, L2, and L3 toward the second region A2.
[0118] The same effects as in the above-described configuration example can be obtained in a display device that applies such a lighting device IL. Furthermore, compared to the configuration example shown in Figure 6, the light guide plates LG1 and LG2 can be omitted, reducing the number of parts and lowering costs.
[0119] Next, we will describe some example configurations for the pixel layout in the display area DA. In each example configuration described below, the pixel electrodes among the elements constituting the pixel are illustrated, while components such as common electrodes and color filters are omitted from the illustration.
[0120] Figure 10 shows an example of a pixel layout configuration in the display area DA.
[0121] Multiple scan lines G are aligned in the second direction Y, and each extends along the first direction X across the first region A1, the second region A2, and the third region A3. The pitch of the multiple scan lines G in the second direction Y is constant.
[0122] Multiple signal lines S are aligned in a first direction X and extend along a second direction Y. The pitch of the multiple signal lines S in the first direction X is constant.
[0123] Each of pixels PX1, PX2, and PX3 corresponds to a region demarcated by two scan lines G adjacent in the second direction Y and two signal lines S adjacent in the first direction X. As described above, the pitch of the multiple scan lines G is constant, and the pitch of the multiple signal lines S is also constant, so the size of each of pixels PX1, PX2, and PX3 is the same.
[0124] Each of the pixel electrodes PE1 of pixel PX1, PE2 of pixel PX2, and PE3 of pixel PX3 is electrically connected to the scan line G and the signal line S via a switching element SW. The sizes of each of the pixel electrodes PE1, PE2, and PE3 are the same. That is, the width WX1 of pixel electrode PE1 along the first direction X, the width WX2 of pixel electrode PE2 along the first direction X, and the width WX3 of pixel electrode PE3 along the first direction X are the same. Also, the width WY1 of pixel electrode PE1 along the second direction Y, the width WY2 of pixel electrode PE2 along the second direction Y, and the width WY3 of pixel electrode PE3 along the second direction Y are the same.
[0125] In this example of a configuration using such a pixel layout, in the first region A1, a color image is displayed by three pixels PX1 aligned in the first direction X, whereas in the second region A2, a color image is displayed by a single pixel PX2. Therefore, in the second region A2, the resolution in the first direction X can be increased by approximately three times compared to the first region A1.
[0126] Similarly, in the third region A3, a color image is displayed by three pixels PX3 aligned in the first direction X. Therefore, in the second region A2, the resolution in the first direction X can be increased by approximately three times compared to the third region A3.
[0127] Figure 11 shows another example of the pixel layout in the display area DA. Note that the switching element SW is shown in a simplified form in Figure 11.
[0128] Multiple scan lines G each extend along the first direction X and are aligned at a constant pitch in the second direction Y. Multiple signal lines S each extend along the second direction Y and are aligned at a constant pitch in the first direction X.
[0129] Pixel PX2 corresponds to the region demarcated by two scan lines G adjacent in the second direction Y and two signal lines S adjacent in the first direction X. Pixels PX1 and PX3 each correspond to the region demarcated by the two outermost scan lines G of the four scan lines G aligned in the second direction Y and two signal lines S adjacent in the first direction X. The size of each pixel PX1 and PX3 is three times the size of pixel PX2.
[0130] The size of pixel electrode PE2 is smaller than the sizes of pixel electrodes PE1 and PE3. In the illustrated example, the size of pixel electrode PE1 is the same as the size of pixel electrode PE3.
[0131] The width WY2 of pixel electrode PE2 along the second direction Y is smaller than the width WY1 of pixel electrode PE1 along the second direction Y, and also smaller than the width WY3 of pixel electrode PE3 along the second direction Y (WY1 > WY2, WY3 > WY2). For example, width WY2 is less than or equal to 1 / 3 of width WY1. Width WY1 is the same as width WY3 (WY1 = WY3).
[0132] As with the configuration example shown in Figure 10, the width of pixel electrode PE1 along the first direction X, the width of pixel electrode PE2 along the first direction X, and the width of pixel electrode PE3 along the first direction X are the same.
[0133] In the illustrated example, pixel electrode PE2 is located between two adjacent scan lines G in the second direction Y, and pixel electrode PE1 intersects with at least one of the two scan lines G that surround pixel electrode PE2. Furthermore, one pixel electrode PE1 and the three pixel electrodes PE2 aligned in the second direction Y are aligned in the first direction X. Also, pixel electrode PE3 intersects with at least one of the two scan lines G that surround pixel electrode PE2. Furthermore, one pixel electrode PE3 and the three pixel electrodes PE2 aligned in the second direction Y are aligned in the first direction X.
[0134] In a configuration example applying this pixel layout, similar to the configuration example shown in Figure 10, the resolution in the first direction X can be increased by approximately three times in the second region A2 compared to the first region A1 and the third region A3. In addition, the resolution in the second direction Y can also be increased by approximately three times in the second region A2 compared to the first region A1 and the third region A3.
[0135] Furthermore, as shown in the example configuration in Figure 11, the pixel layout is not limited to one in which one pixel electrode PE1 and three pixel electrodes PE2 aligned in the second direction Y are aligned in the first direction X. By applying a pixel layout in which one pixel electrode PE1 and multiple pixel electrodes PE2 aligned in the second direction Y are aligned in the first direction X, the resolution in the second direction Y of the second region A2 can be improved compared to the first region A1.
[0136] Figure 12 shows another example of a pixel layout configuration in the display area DA. Note that scan lines, signal lines, and switching elements are omitted from Figure 12.
[0137] In the first region A1, multiple pixel electrodes PE1 aligned in the first direction X expand in the first direction X as they move away from the second region A2. That is, pixel electrodes PE1 adjacent to the second region A2 have a width WX11 along the first direction X. Pixel electrodes PE1 further from the second region A2 than those with width WX11 have a width WX12 along the first direction X. The pixel electrode PE1 furthest from the second region A2 has a width WX13 along the first direction X. Width WX11 is smaller than width WX12, and width WX12 is smaller than width WX13 (WX11 <WX12<WX13)。
[0138] In the third region A3, multiple pixel electrodes PE3 aligned in the first direction X expand in the first direction X as they move away from the second region A2. That is, pixel electrodes PE3 adjacent to the second region A2 have a width WX31 along the first direction X. Pixel electrodes PE3 further from the second region A2 than those with width WX31 have a width WX32 along the first direction X. The pixel electrode PE3 furthest from the second region A2 has a width WX33 along the first direction X. Width WX31 is smaller than width WX32, and width WX32 is smaller than width WX33 (WX31 <WX32<WX33)。
[0139] In the second region A2, all pixel electrodes PE2 have the same width WX2 along the first direction X. For example, width WX2 is the same as widths WX11 and WX31.
[0140] In the illustrated example, as with the configuration example shown in Figure 10, the width of all pixel electrodes PE1 along the second direction Y, the width of all pixel electrodes PE2 along the second direction Y, and the width of all pixel electrodes PE3 along the second direction Y are the same.
[0141] According to the configuration example applying such a pixel layout, in the second region A2, similar to the above configuration example, high definition can be achieved in the first direction X compared to each of the first region A1 and the third region A3. In addition, the definition along the first direction X in each of the first region A1 and the third region A3 is gradually increased in high definition as approaching the second region A2 which is a high-definition display region. Thereby, it is possible to make it difficult to visually recognize the difference in definition between the second region A2 and the first region A1, and the difference in definition between the second region A2 and the third region A3.
[0142] FIG. 13 is a diagram showing another configuration example of the pixel layout in the display region DA. In FIG. 13, illustration of scanning lines, signal lines, and switching elements is omitted.
[0143] The configuration example shown in FIG. 13 is different from the configuration example shown in FIG. 12 in that the definition along the second direction Y in each of the first region A1 and the third region A3 is gradually increased in high definition as approaching the second region A2.
[0144] In the first region A1, a plurality of pixel electrodes PE1 arranged in the first direction X are extended in the second direction Y as they are farther from the second region A2. That is, the pixel electrode PE1 adjacent to the second region A2 has a width WY11 along the second direction Y. The pixel electrode PE1 spaced apart from the second region A2 more than the pixel electrode PE1 having the width WY11 has a width WY12 along the second direction Y. The pixel electrode PE1 most spaced apart from the second region A2 has a width WY13 along the second direction Y. The width WY11 is smaller than the width WY12 (WY11 < WY12). In the illustrated example, the width WY12 is the same as the width WY13, but the width WY12 may be smaller than the width WY13.
[0145] In the third region A3, a plurality of pixel electrodes PE3 arranged in the first direction X are extended in the second direction Y as they move away from the second region A2. That is, the pixel electrode PE3 adjacent to the second region A2 has a width WY31 along the second direction Y. The pixel electrode PE3 spaced apart from the second region A2 more than the pixel electrode PE3 having the width WY31 has a width WY32 along the second direction Y. The pixel electrode PE3 farthest from the second region A2 has a width WY33 along the second direction Y. The width WY31 is smaller than the width WY32 (WX31 < WX32). In the illustrated example, the width WY32 is the same as the width WY33, but the width WY32 may be smaller than the width WY33.
[0146] In the second region A2, all pixel electrodes PE2 have the same width WY2 along the second direction Y. The width WY2 is smaller than the width WY11 and the width WY31.
[0147] Regarding the width along the first direction X, it is the same as the configuration example shown in FIG. 12. That is, the width WX31 is smaller than the width WX32, and the width WX32 is smaller than the width WX33 (WX31 < WX32 < WX33). The width WX31 is smaller than the width WX32, and the width WX32 is smaller than the width WX33 (WX31 < WX32 < WX33).
[0148] According to the configuration example applying such a pixel layout, similar to the above configuration example, in the second region A2, high definition can be achieved in the first direction X and the second direction Y as compared with each of the first region A1 and the third region A3. In addition, the fineness along the second direction Y in each of the first region A1 and the third region A3 is gradually increased in high definition as it approaches the second region A2 which is a high definition display region. Thereby, it is possible to make it difficult to visually recognize the difference in fineness between the second region A2 and the first region A1, and the difference in fineness between the second region A2 and the third region A3.
[0149] For example, in the above embodiment, the pixel PX1 in the first region A1 corresponds to the first pixel, the pixel PX2 in the second region A2 corresponds to the second pixel, and the pixel PX3 in the third region A3 corresponds to the third pixel.
[0150] Light source unit LS1 corresponds to the first light source unit, and light source unit LS2 corresponds to the second light source unit. Light-emitting element LD1 corresponds to the first light-emitting element, light-emitting element LD2 corresponds to the second light-emitting element, light-emitting element LD3 corresponds to the third light-emitting element, and light-emitting element LD0 corresponds to the fourth light-emitting element. Light guide plate LG1 corresponds to the first light guide plate, prism section P11 corresponds to the first prism section, and flat section F1 corresponds to the first flat section. Light guide plate LG2 corresponds to the second light guide plate, prism section P2 corresponds to the second prism section, and flat section F11 corresponds to the second flat section.
[0151] Subframe period SF1 corresponds to the first subframe period, subframe period SF2 corresponds to the second subframe period, and subframe period SF3 corresponds to the third subframe period.
[0152] Pixel electrodes PE1, PE11 to PE13 correspond to the first pixel electrodes, pixel electrodes PE2, PE21 to PE26 correspond to the second pixel electrodes, and pixel electrodes PE3, PE31 to PE33 correspond to the third pixel electrodes.
[0153] According to the embodiments described above, a display device capable of improving display quality can be provided.
[0154] While several embodiments of this disclosure have been described, these embodiments are presented as examples only and are not intended to limit the scope of the disclosure. These novel embodiments can be implemented in a variety of other forms, and various omissions, substitutions, and modifications are permitted without departing from the gist of the disclosure. These embodiments and their variations are included in the scope and gist of the disclosure, as well as in the disclosures described in the claims and their equivalents. [Explanation of symbols]
[0155] DSP...Display device PNL...Liquid crystal panel IL...Illumination device CNT...Control unit DA...display area A1...first area A2...second area A3...third area PX...pixel LG1, LG2...Light guide plate S1, S2...Side F1, F11, F12... Flat section P11, P12, P2... Prism section LS1, LS2...Light source section LD0, LD1, LD2, LD3… Light-emitting elements CF1, CF2, CF3…Color filters TR…Transparent resin layer 21...Black Matrix 22...Overcoat Layer G...Scan line S...Signal line SW...Switching element PE...Pixel electrode CE...Common electrode
Claims
1. A liquid crystal panel comprising a display area for displaying an image, a first area having a plurality of first pixels, and a second area having a plurality of second pixels, A lighting device configured to illuminate the aforementioned liquid crystal panel, The system comprises a control unit that controls the liquid crystal panel and the lighting device, Each of the aforementioned plurality of first pixels is equipped with a color filter, None of the aforementioned multiple second pixels are equipped with a color filter. The aforementioned lighting device is A first light source unit configured to emit white illumination light toward the first region, A second light source unit comprises a first light-emitting element configured to emit illumination light in a first wavelength range toward the second region, and a second light-emitting element configured to emit illumination light in a second wavelength range different from the first wavelength range toward the second region. The control unit controls the first light-emitting element to display a first color image in the first wavelength range in the second region in synchronization with the lighting up of the first light-emitting element, and to display a second color image in the second wavelength range in the second region in synchronization with the lighting up of the second light-emitting element. Display device.
2. The control unit, During the first subframe period of one frame period, the first light-emitting element is turned on and the second light-emitting element is turned off. During the second subframe period following the first subframe period, the first light-emitting element is turned off and the second light-emitting element is turned on. Control the first light source to light up over the first subframe period and the second subframe period. The display device according to claim 1.
3. The control unit, During the first subframe period, a first video signal is written to each of the plurality of first pixels, and a first sub-video signal for displaying the first color image is written to each of the plurality of second pixels. During the second subframe period, the system is controlled to write a second video signal identical to the first video signal to each of the plurality of first pixels, and to write a second sub-video signal for displaying the second color image to each of the plurality of second pixels. The display device according to claim 2.
4. The aforementioned lighting device further, First light guide plate and The device comprises a second light guide plate that overlaps the first light guide plate, The first light source unit is positioned opposite the side surface of the first light guide plate, The second light source unit faces the side surface of the second light guide plate, Each of the first light guide plate and the second light guide plate overlaps the first region and the second region, The display device according to claim 1.
5. The first light guide plate has a first prism section in which a plurality of prisms overlapping the first region are arranged, and a first flat section overlapping the second region. The second light guide plate has a second prism section in which a plurality of prisms overlapping the second region are arranged, and a second flat section overlapping the first region. The display device according to claim 4.
6. The first region and the second region are aligned in the first direction, The width of the second prism section along the first direction is greater than the width of the second region along the first direction. The display device according to claim 5.
7. The aforementioned lighting device further includes a light guide plate, The first light source unit is positioned directly below the first region, The second light source unit is positioned opposite the side surface of the light guide plate, The light guide plate overlaps the first region and the second region. The display device according to claim 1.
8. The light guide plate has a prism section in which a plurality of prisms are arranged overlapping the second region, and a flat section overlapping the first region. The display device according to claim 7.
9. The first region and the second region are aligned in the first direction, The width of the prism portion along the preceding first direction is greater than the width of the preceding second region along the preceding first direction. The display device according to claim 8.
10. The first light source unit is superimposed on the flat portion, The display device according to claim 8.
11. The first light source unit is positioned directly below the first region, The second light source is located directly below the second region. The display device according to claim 1.
12. The aforementioned liquid crystal panel is Each of the plurality of first pixels is provided with a first pixel electrode that overlaps the color filter, A second pixel electrode is arranged in each of the plurality of second pixels, A transparent resin layer overlapping the second pixel electrode, A transparent overcoat layer covering the color filter and the transparent resin layer, A common electrode overlapping the first pixel electrode and the second pixel electrode is provided, A display device according to claim 1.
13. The liquid crystal panel further comprises a black matrix disposed between adjacent first pixels, The black matrix is not located between adjacent second pixels. The display device according to claim 12.
14. The first region and the second region are aligned in the first direction, The width of the first pixel electrode along the first direction is the same as the width of the second pixel electrode along the first direction. The display device according to claim 12.
15. The first region and the second region are aligned in the first direction, The width of the second pixel electrode along the second direction intersecting the first direction is smaller than the width of the first pixel electrode along the second direction. The display device according to claim 12.
16. The liquid crystal panel further comprises a plurality of scan lines that extend in the first direction and are aligned in the second direction, The second pixel electrode is located between two adjacent scan lines in the second direction among the plurality of scan lines, The first pixel electrode intersects with at least one of the two scan lines, The display device according to claim 15.
17. One of the first pixel electrodes and a plurality of the second pixel electrodes arranged in the second direction are arranged in the first direction. The display device according to claim 15.
18. The first region and the second region are aligned in the first direction, Among the first pixel electrodes arranged in each of the plurality of first pixels, the width along the first direction of the first pixel electrode adjacent to the second region is smaller than the width along the first direction of the first pixel electrode spaced away from the second region. The display device according to claim 12.
19. The first region and the second region are aligned in the first direction, Among the first pixel electrodes arranged in each of the plurality of first pixels, the width along the second direction intersecting the first direction of the first pixel electrode adjacent to the second region is smaller than the width along the second direction of the first pixel electrode spaced away from the second region. The display device according to claim 12.
20. The liquid crystal panel further comprises a third region having a plurality of third pixels, Each of the aforementioned plurality of third pixels is equipped with a color filter, The first light source is configured to emit the white illumination light toward the third region, The first region, the second region, and the third region are arranged in this order along the first direction. The width of the first region along the first direction is different from the width of the third region along the first direction. The display device according to claim 1.