JP5506205B2 - 3D display device - Google Patents

Description

  The present invention relates to a three-dimensional display device that provides a three-dimensional display to an observer at a predetermined position.

  Two transmissive liquid crystal cells are arranged at a predetermined interval, and a short distance image is displayed on a liquid crystal cell (front panel) on the front side of the observer, and a liquid crystal cell (rear panel) on the back side of the observer ), A three-dimensional display device that gives a viewer a stereoscopic display with a sense of depth by displaying an image on the far side. Such a three-dimensional display device is used for, for example, a vehicle-mounted display on which the observer's viewpoint position is fixed.

  FIG. 27 is a diagram illustrating an example of the configuration of the three-dimensional display device as described above. In the three-dimensional display device, as shown in the figure, the liquid crystal cell FP and the liquid crystal cell RP are arranged to overlap each other at a predetermined interval, and the polarizing plate PL2 is provided on the front side of the liquid crystal cell FP. A polarizing plate PL1 having a polarization axis perpendicular to the polarizing plate PL2 is disposed on the back side. In addition, the backlight BL is disposed on the back side of the liquid crystal cell RP, each light emitting element LD emits white light, and a light source is provided to the liquid crystal cell RP and the liquid crystal cell FP.

  FIG. 28 is a diagram showing a three-dimensional display device and the state of an observer at a predetermined position. The liquid crystal cell FP and the liquid crystal cell RP are arranged at different distances as viewed from the observer. The two liquid crystal cells display an image obtained by projecting a stereoscopic image to be provided to the viewer while changing the luminance. Thereby, an illusion that a stereoscopic image exists between the two liquid crystal cells (DFD illusion) is given to the observer. The principle of giving such an illusion to the observer is described in Non-Patent Documents 1 to 4.

S. Suyama, et al., “A novel direct-vision 3-Ddisplay using luminance-modulated two 2-D images displayed at different depth”, SID2000Digest, pp.1208-1211, 2000. H. Takada, et al., “A compact depth-fused 3-DLCD”, SID2003 Digest, pp.1526-1529, 2003. Y. Ishigure, et al., “Evaluation of visual fatigue relative in the viewing of a depth-fused 3-D display and 2-Ddisplay”, IDW2004 Digest, pp.1627-1630, 2004. S. Suyama, et al., “Apparent 3-Dimage perceived from luminance-modulated two 2-D images displayed at differentdepths”, Vision Research 44, pp.785-793, 2004.

  Here, in the three-dimensional display device as shown in FIG. 27, the light use efficiency deteriorates because the light of the backlight is transmitted through the color filter substrate CF of the liquid crystal cell FP and the liquid crystal cell RP. For this reason, there exists a subject that the power consumption of a backlight becomes large in order to ensure the brightness | luminance required in a three-dimensional display apparatus.

  In view of the above problems, an object of the present invention is to provide a three-dimensional display device with improved light utilization efficiency.

  In order to solve the above-described problems, a three-dimensional display device according to the present invention is configured to provide a backlight that emits a plurality of light emission colors according to a light emission period in a predetermined order, and according to the light emission color in synchronization with light emission by the backlight. A first liquid crystal cell for illuminating a pixel, and disposed on a side opposite to the backlight with respect to the first liquid crystal cell at a predetermined distance from the first liquid crystal cell, in synchronization with light emission by the backlight; A second liquid crystal cell that lights a pixel in accordance with the emission color, and the backlight, the first liquid crystal cell, and the second liquid crystal cell transmit light from the backlight through the first liquid crystal cell. In addition, the first liquid crystal cell and the second liquid crystal cell are provided so as to be supplied to the second liquid crystal cell. Change and display It is characterized in.

  In the aspect of the three-dimensional display device according to the present invention, the light emission period includes a light emission period in which one of the light emission colors is emitted, and a black color that is black before the light emission period starts. A period is provided for each of the emission colors, and the first liquid crystal cell and the second liquid crystal cell drive pixels that are lit in accordance with the one emission color in the emission period in the black period. You may be allowed to do so.

  In the aspect of the three-dimensional display device according to the present invention, the backlight includes a plurality of blocks that emit light according to the light emission period, and each of the blocks has a phase according to the arrangement of the blocks. The light emission period is provided such that the first liquid crystal cell and the second liquid crystal cell each include a pixel provided in a region to which light is supplied from each block, and the black period in each block. And may be turned on during the light emission period in each of the blocks.

  In the aspect of the three-dimensional display device according to the present invention, the backlight starts the black period of the adjacent block on the side of the block whose phase is delayed in the black period of each of the blocks. In addition, each of the blocks starts the light emission period in which the light emission color is emitted in the order in which the phase is delayed according to the arrangement, and the light emission period in each of the blocks is a block that emits light with different light emission colors at the same time. , And may be provided so as to be isolated by a black block.

  In one aspect of the three-dimensional display device according to the present invention, the second liquid crystal cell is supplied with light diffused from one of the blocks, and the second liquid crystal cell has the one liquid crystal cell. An area where a pixel is turned on according to the color of light emitted by the block may be extended from an area overlapping with the one block to a side of the black block adjacent to the one block. .

  Further, in one aspect of the three-dimensional display device according to the present invention, the second liquid crystal cell includes a region overlapping with the one block and a region overlapping with a part of the adjacent black block. The pixel may be turned on according to the emission color, and the area overlapping with a part of the adjacent black block may be provided adjacent to the area overlapping with the one block.

  In one aspect of the three-dimensional display device according to the present invention, light is diffused and supplied from one of the blocks to the first liquid crystal cell and the second liquid crystal cell, and the first liquid crystal cell is supplied. In the cell and the second liquid crystal cell, an area in which a pixel is lit in accordance with the color of light emitted by the one block is a black block adjacent to the one block from an area overlapping the one block. The second liquid crystal cell may be extended so that a region where a pixel corresponding to the light emission color is lit is wider than that of the first liquid crystal cell.

  In the aspect of the three-dimensional display device according to the present invention, the second liquid crystal cell has a block-corresponding drive region that drives a pixel corresponding to light emission by each of the blocks, When a corresponding block corresponding to driving of a pixel is adjacent to another block whose phase of the light emission period is delayed with respect to the corresponding block, the block corresponding driving area overlaps with a part of the corresponding block, and It may be provided with a predetermined width shifted on the other block side, and the pixels in the block corresponding drive area may be driven in the black period of the corresponding block.

  Further, in one aspect of the three-dimensional display device according to the present invention, the block corresponding drive area is shifted by a predetermined width to the other block side, and a shift area provided to avoid overlap with the corresponding block; A lighting continuation area that is provided adjacent to the shift area so as to overlap with the corresponding block, and in which a pixel continues to be lit in a black period after the light emission period of the corresponding block ends, and the corresponding block A pixel in the shift region that is overlapped and adjacent to the lighting maintenance region, and in which the lighting of the pixel is canceled in a black period after the light emission period of the corresponding block is completed. And the pixels in the lighting continuation region are arranged in the black period after the emission period of the corresponding block while the other blocks emit the emission color. Is turned on in response to the light color, it may be.

  Further, in one aspect of the three-dimensional display device according to the present invention, the pixels in the block corresponding drive region provided by shifting by a predetermined width, while the corresponding block and the other block are in the black period, You may make it drive a pixel corresponding to the said luminescent color.

  In the aspect of the three-dimensional display device according to the present invention, the emission color may include an emission color generated by mixing at least two of the emission colors. In the aspect of the three-dimensional display device according to the present invention, a transparent resin may be filled between the first liquid crystal cell and the second liquid crystal cell.

  In the aspect of the three-dimensional display device according to the present invention, the first liquid crystal cell and the second liquid crystal cell may include a plurality of scanning signal lines laid in parallel in a predetermined direction and supplied with scanning signals. Each including an array substrate for driving pixels connected to the scanning signal line in accordance with the emission color, wherein the blocks are arranged in a direction perpendicular to the predetermined direction, and the backlight and the first liquid crystal panel A field-of-view restricting member that restricts diffusion of light from each of the blocks in the vertical direction may be provided between the blocks.

  In the aspect of the three-dimensional display device according to the present invention, the first liquid crystal cell and the second liquid crystal cell may include a plurality of scanning signal lines laid parallel to a predetermined direction and a vertical direction of the predetermined direction. Each including an array substrate having a pixel region partitioned by a plurality of video signal lines laid in parallel, wherein the scanning signal line includes a first scanning signal line group and a second scanning signal line group, and the video The signal lines include a first video signal line group orthogonal to the first scanning signal line group and a second video signal line group orthogonal to the second scanning signal line group, and the first liquid crystal cell and the second liquid crystal cell. The pixel area is defined by a first scanning area defined by the first scanning signal line group and the first video signal line group, and a second scanning signal line group and the second video signal line group. A first scanning region including a second scanning region; And a boundary between the second scanning region and the scanning signal line are provided so that separate scanning signals are simultaneously supplied to the first scanning signal line group and the second scanning signal line group, respectively. Then, the pixels in the first scanning region are turned on when a video signal is supplied from the first video signal line group according to the scanning signal supplied to the first scanning signal line group, and the second scanning region is turned on. The pixels in may be lit with a video signal supplied from the second video signal line group in accordance with a scanning signal supplied to the second scanning signal line group.

  In the aspect of the three-dimensional display device according to the present invention, the backlight includes a first backlight region corresponding to the first scanning region, a second backlight region corresponding to the second scanning region, The first backlight region is constituted by a plurality of blocks arranged in the vertical direction, and the second backlight region is constituted by a plurality of blocks arranged in the vertical direction, and the light emission period Are provided with a light emission period for emitting one of the light emission colors and a black period for turning black before the light emission period starts for each of the light emission colors. Each of the blocks in the backlight region and the second backlight region is provided with the light emission period so that the phase is delayed in the order arranged in the vertical direction. The one emission color is emitted in the order in which the pixels are arranged, and the pixels provided in the first scanning region are synchronized with the emission of each of the blocks in the first backlight region according to the emission color. The pixels that are lit and provided in the second scanning area may be lit according to the emission color in synchronization with the light emission by each of the blocks in the second backlight area.

  In the aspect of the three-dimensional display device according to the present invention, each of the blocks in the first backlight region emits the one emission color in the order arranged in the vertical direction, and then the first backlight region. Each of the blocks in one backlight region starts light emission in a light emission color different from the one light emission color in the order arranged in the vertical direction, and each of the blocks in the second backlight region You may make it start the light emission by said one light emission color in the order arranged in the perpendicular direction.

  Moreover, in one aspect of the three-dimensional display device according to the present invention, the light emission period in each of the blocks is alternately a block that emits light simultaneously with one of the light emission colors and a block that becomes black, The light emitting block may be provided so as to be isolated from the black block.

  In the aspect of the three-dimensional display device according to the present invention, the first backlight area is configured by arranging the first block and the second block from the vertical direction, and the second backlight area is A third block and a fourth block provided adjacent to the second block are arranged in the vertical direction, and the first block, the second block, the third block, and the second block are arranged. The four blocks are provided so that the phase of the light emission period is delayed so that the light emission color is emitted in the order from the first block to the fourth block, and the first block and the third block emit light. The second block and the fourth block are black, and when the second block and the fourth block emit light, the first block and the third block are black. It may be so.

  ADVANTAGE OF THE INVENTION According to this invention, the three-dimensional display apparatus which improved the utilization efficiency of the light of a backlight can be provided.

It is a figure which shows the structure of the three-dimensional display apparatus in 1st Embodiment. It is a figure which shows a mode that the light emitting element is arrange | positioned in the metal frame of the backlight in 1st Embodiment. It is a figure which shows the equivalent circuit schematic provided in the array substrate of the 1st liquid crystal cell in a 1st liquid crystal cell, and a 2nd liquid crystal cell. It is a figure which shows the order which light-emits three primary colors of RGB in the light emission period of the backlight of 1st Embodiment. It is a figure which shows the timing which the backlight of 1st Embodiment light-emits RGB, and the timing which two array substrates drive a pixel synchronizing with a backlight. It is a figure which shows a mode in case the backlight in 1st Embodiment is comprised by the light emitting element provided in the side surface of the light guide plate and the light guide plate. It is a figure which shows a mode when the three-dimensional display apparatus in 1st Embodiment is comprised including the side-edge type backlight shown by FIG. It is a figure which shows the order which light-emits each light emission color of WRGB in the light emission period of a backlight. It is a figure which shows the timing which a backlight emits WRGB, and the timing which two array substrates drive a pixel synchronizing with a backlight. It is a figure which shows a mode that the transparent resin was filled between the 1st liquid crystal cell and the 2nd liquid crystal cell in the three-dimensional display apparatus in 1st Embodiment. It is a figure which shows the mode of the backlight of the three-dimensional display apparatus in 2nd Embodiment. It is a schematic diagram of the cross section of the three-dimensional display apparatus in 2nd Embodiment. It is a figure which shows a mode that the backlight BL in 2nd Embodiment light-emits. It is a figure which shows the lighting state of the 2nd liquid crystal cell corresponding to the state of the backlight to which the code | symbol of (1) in the figure in FIG. 11 was attached | subjected. It is a figure which shows typically the state in which a pixel lights in response to light emission by a backlight in the 2nd liquid crystal cell in 2nd Embodiment. It is a figure explaining the drive area | region corresponding to a block provided in the 2nd liquid crystal cell in 2nd Embodiment. The figure which shows the timing which the 1st-4th block of the backlight in 2nd Embodiment light-emits, and the timing when the pixel provided in the area | region which overlaps with each block in a 1st liquid crystal cell and a 2nd liquid crystal cell is driven. It is. It is a figure which shows a mode that each block of the backlight in 2nd Embodiment light-emits each luminescent color of WRGB. FIG. 15 is a diagram schematically illustrating a state where pixels are lit in the second liquid crystal cell corresponding to FIG. 14. The timing at which the first to fourth blocks of the backlight in the second embodiment emit light to the WRBG and the timing at which the pixels provided in the areas overlapping the respective blocks in the first liquid crystal cell and the second liquid crystal cell are driven. FIG. It is a figure which shows a mode in case the backlight in 2nd Embodiment is comprised by the light emitting element provided in the side surface of four light-guide plates and a light-guide plate. It is a figure which shows a mode when the three-dimensional display apparatus in 2nd Embodiment is comprised including the side-edge type backlight shown by FIG. In the third embodiment, the backlight of the three-dimensional display device emits RGB light, and the first and second scanning regions provided in the first and second liquid crystal cells in synchronization with the backlight. It is a figure which shows the timing which drives a pixel. It is a figure which shows typically the equivalent circuit schematic of the array substrate of the 1st liquid crystal cell in 2nd Embodiment, and a 2nd liquid crystal cell. It is a figure which shows a mode that each block of the backlight in 4th Embodiment light-emits. In the 2nd liquid crystal cell in a 4th embodiment, it is a mimetic diagram showing the state where a pixel lights according to light emission by a back light. The figure which shows the timing which the pixel provided in the area | region which overlaps with each block in the 1st liquid crystal cell and the 2nd liquid crystal cell drives the timing which the 1st-4th block of the backlight in 4th Embodiment light-emits. It is. It is a figure which shows a mode in case each block of the backlight in 4th Embodiment light-emits WRGB. FIG. 25 is a diagram schematically showing a state where pixels are lit in the second liquid crystal cell corresponding to FIG. 24. The timing at which the first to fourth blocks of the backlight in the second embodiment emit light to the WRBG and the timing at which the pixels provided in the areas overlapping the respective blocks in the first liquid crystal cell and the second liquid crystal cell are driven. FIG. It is a figure which shows an example of a structure of the conventional three-dimensional display apparatus. It is a figure which shows the 1st liquid crystal cell and 2nd liquid crystal cell of a three-dimensional display apparatus, and the positional relationship of an observer.

[First embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration of a three-dimensional display device according to the present embodiment. The three-dimensional display device shown in the figure includes a backlight BL, a first liquid crystal cell RP, and a second liquid crystal cell FP. The second liquid crystal cell FP is provided on the opposite side (observer side) of the backlight BL with respect to the first liquid crystal cell RP at a predetermined interval from the first liquid crystal cell RP. Further, a lower polarizing plate PL1 is provided between the backlight BL and the first liquid crystal cell RP, and an upper polarizing plate PL2 is provided on the viewer side of the second liquid crystal cell FP. The light emitting region of the backlight BL, the first liquid crystal cell RP, and the second liquid crystal cell FP are turned on so that the pixels provided in the first liquid crystal cell RP and the second liquid crystal cell FP are lit by light emitted from the backlight BL. The display areas for displaying images are overlapped with each other.

  The backlight BL is configured by regularly arranging a plurality of light emitting elements LD at a predetermined interval in a metal frame MF. In particular, the light emitting element LD is a light emitting diode, and each light emitting element LD has a light emission cycle in which each light emission color of red, green, and blue (hereinafter, RGB) emits light according to a predetermined order. The light is emitted repeatedly according to the light emission period. The backlight BL further includes a prism sheet PS, a diffusion sheet DS, and a reflection sheet RS. The light emitted from each light emitting element LD is provided to the first liquid crystal cell RP while the luminance is uniformed through the prism sheet PS and the diffusion sheet DS. The reflection sheet RS is attached to the inside of the metal frame MF, and reflects the light emitted from each light emitting element LD toward the prism sheet PS. FIG. 2 is a diagram illustrating a state in which the light emitting elements LD are arranged in the metal frame MF of the backlight BL. Each light emitting element LD is regularly arranged at predetermined intervals in the vertical and horizontal directions in the figure, directly below the display areas of the first liquid crystal cell RP and the second liquid crystal cell FP.

  The first liquid crystal cell RP includes an array substrate S1, a counter substrate F1, and a liquid crystal layer LC1 in which a plurality of pixels are arranged in a matrix. The second liquid crystal cell FP is similarly configured as an array substrate S2 and a counter substrate F2. The liquid crystal layer LC2 is included. The light provided from the backlight BL is linearly polarized by the polarizing plate PL1 and the polarization state is controlled for each pixel when passing through the liquid crystal layer LC1. The light of the backlight whose polarization state is controlled and transmitted through the first liquid crystal cell RP further passes through the polarizing plate PL2 with its polarization state controlled when passing through the liquid crystal layer LC2.

  Here, when only the liquid crystal layer LC1 changes the polarization angle, brightness is given to the display area of the first liquid crystal cell RP to display an image, and when only the liquid crystal layer LC2 changes the polarization angle, The luminance is given to the display area of the two liquid crystal cell FP and an image is displayed. In addition, when both the liquid crystal layer LC1 and the liquid crystal layer LC2 change the polarization angle, luminance is given to each of the first liquid crystal cell RP and the second liquid crystal cell FP, and an image is displayed. In order to display a three-dimensional image on the three-dimensional display device, projection images of the three-dimensional image are displayed on the first liquid crystal cell RP and the second liquid crystal cell FP, respectively. The brightness of the projected image in the first liquid crystal cell RP and the second liquid crystal cell FP is controlled according to the depth position (distance from the observer) of the object to be displayed as a three-dimensional image. A dimensional image is recognized by an observer between the first liquid crystal cell RP and the second liquid crystal cell FP. Specifically, the brightness control here is to observe the position of the depth of the three-dimensional image by making the brightness of the projection image of the second liquid crystal FP cell higher than the brightness of the projection image of the first liquid crystal cell RP. The observer is made to recognize it so as to be on the near distance side (second liquid crystal cell FP side) of the person. In the second liquid crystal cell FP, a two-dimensional projection image (short-distance side image) in which the brightness of an object to be displayed on the short distance side from the observer is increased is displayed, and the first liquid crystal cell RP is displayed on the long distance side from the observer. A two-dimensional projection image (far-distance side image) in which the brightness of the object to be displayed is increased is displayed. In this way, by controlling the luminance in the images displayed on the first liquid crystal cell RP and the second liquid crystal cell FP, respectively, an illusion is generated for the observer and a three-dimensional image is provided.

  FIG. 3 is a diagram showing an equivalent circuit diagram of the array substrate S1 in the first liquid crystal cell RP, and a similar circuit is provided in the array substrate S2. As shown in the figure, on the array substrate S1, a plurality of scanning signal lines GL extending in the horizontal direction in the drawing are arranged in parallel in the vertical direction in the drawing at equal intervals, and a plurality of scanning signal lines GL extending in the vertical direction in the drawing. Video signal lines DL are arranged side by side in the figure at equal intervals. Each pixel is partitioned by the scanning signal line GL and the video signal line DL, and a pixel region in which the pixels are arranged in a matrix is formed on the array substrate S1. Each partitioned pixel has a thin film transistor having a MIS (Metal-Insulator-Semiconductor) structure. A scanning signal is sequentially supplied from each scanning signal line GL, and a video signal is supplied to the pixel electrode PX via each video signal line DL at the timing of selecting a pixel row by the scanning signal line GL. When a video signal is supplied to the pixel connected to the selected scanning signal line GL, the pixel electrode PX and a counter electrode (not shown) provided on the counter substrate F1 to which a reference voltage is applied. A potential difference is generated between the liquid crystal layer LC1 and the liquid crystal layer LC1 is driven. In this way, the pixel is driven, and the pixel is turned on by the light supplied from the backlight BL. The liquid crystal layer LC1 contains liquid crystal molecules that have both liquid fluidity and solid (crystal) optical properties, and can control the light state by changing the direction of the molecules by voltage or the like. Is a layer.

  Further, the counter substrates F1 and F2 in this embodiment are not provided with a color filter for coloring the light from the backlight BL, and the black matrix has a grid shape so as to overlap the scanning signal lines GL and the video signal lines DL. It is formed. The light from the backlight BL transmitted through the liquid crystal layer LC1 or the liquid crystal layer LC2 is transmitted through the opening of the black matrix of the counter substrate F1 or F2 while substantially maintaining the wavelength distribution of the light emitted from the backlight BL. In this case, it is not necessary to divide one pixel into three cells of RGB, so that the aperture ratio can be improved by about three times, and it goes without saying that the light utilization efficiency is improved.

  Here, FIG. 4A is a diagram showing the order of emitting the three primary colors of RGB in the light emission period of the backlight BL in the present embodiment. In the figure, the vertical hatching indicates red (R), the diagonal hatching in the figure indicates green (G), and the horizontal hatching in the figure indicates blue (B). The same hatching is applied. Each light emitting element LD is provided with a common light emission period. The phase of this light emission period is common to all the light emitting elements LD, and as shown in the figure, the light emission color is emitted so as to be the same color in the entire region of the backlight BL. FIG. 4B shows the timing (BL) at which the backlight BL emits RGB emission colors in this embodiment and the timing (TS_AL) at which the array substrates S1 and S2 drive the pixels corresponding to the emission colors in synchronization with the backlight BL. ). The broken lines in the figure indicate a light emission period in which the backlight BL emits red (R), and a scanning period in which the scanning signal lines GL are sequentially driven in order to select pixels that the array substrates S1 and S2 are lit in red (R). Is shown. Similarly, a thick solid line in the figure indicates a light emission period in which the backlight BL emits green (G) and a green (G) scanning period by the array substrates S1 and S2, and a thick broken line in the figure indicates the backlight. The light emission period in which BL emits blue (B) and the blue (B) scanning period by the array substrates S1 and S2 are shown, and the correspondence relationship is maintained in the drawings subsequent to FIG.

  As shown in FIG. 4B, the light emission period of the backlight BL is provided with three light emission periods corresponding to RGB light emission colors. Before these light emission periods start, a black period in which the backlight BL is turned off and becomes black is provided. In the black period, a scanning period in which the pixels of the array substrates S1 and S2 are driven is assigned corresponding to the light emission color emitted in the light emission period starting after the end of the black period. This will be described below. First, as shown in FIG. 3, the array substrates S1 and S2 are provided with a scanning line driving circuit GDR for controlling each scanning signal line GL and a video line driving circuit DDR for controlling each video signal line DL. When the backlight BL emits red light, the scanning line driving circuit GDR sequentially selects the scanning signal lines GL. At this time, the video line driving circuit DDR supplies the video signal to the pixels to be lit in red among the pixels connected to the selected scanning signal line GL at the timing when the scanning signal line GL is selected, and drives the pixels. Let The scanning line driving circuit GDR provides scanning signals to all of the scanning signal lines GL, and driving of the pixels to be lit in red finishes, so that the scanning period for lighting red (hereinafter, red scanning period) is completed. . After the end of the red scanning period, a red light emission period (hereinafter referred to as a red light emission period) in the backlight BL is started. During the light emission period, pixels selectively driven in the red scanning period are generated by the backlight BL. Lights up red by light emission. And the state lighted in red is maintained until the end of the light emission period. Further, after the end of the light emission period, a black period in which the backlight BL becomes black starts, and a green scanning period starts in the array substrates S1 and S2.

  In the three-dimensional display device according to the present embodiment, the light emission cycle of the backlight BL shown in FIG. 4B is a period of 1/60 seconds. Therefore, display of only red, display of only green, and display of only blue are independently performed within a period of 1/180 seconds. In this 1/60 second period, the image divided into RGB according to the afterimage property of the human eye is additively mixed and recognized as one image. In this way, the first liquid crystal cell RP displays the short distance side image, and the second liquid crystal cell FP displays the long distance side image, thereby providing a three-dimensional image to the observer.

  The backlight BL in the present embodiment is a direct type backlight, but may be a side edge type backlight BL as shown in FIG. FIG. 6 is a diagram showing a state in which a three-dimensional display device is configured including a side edge type backlight as shown in FIG. In this case, the backlight BL includes the light guide plate LG provided so as to overlap the display areas of the first liquid crystal cell and the second liquid crystal cell, the light emitting element LD provided on the side surface of the light guide plate LG, and the prism sheet PS. And a diffusion sheet DS and a reflection sheet RS. The light emitted from the light emitting element LD is guided to the light guide plate LG and the reflection sheet RS provided on the bottom surface of the light guide plate LG, and the luminance is uniformed through the prism sheet PS and the diffusion sheet DS. One liquid crystal cell RP is provided. Each light emitting element LD is provided with a light emission period as in the case of a direct type backlight.

  Further, in the light emission period of the backlight BL in the present embodiment, three light emission periods are provided to emit the three primary colors of RGB. For example, a light emission period for emitting white light (hereinafter referred to as W) is further provided. Also good. Here, white is a color that can be generated by mixing all the colors of RGB, but a light emission period for emitting a color that can be generated by mixing any two of the three primary colors may be provided. Here, FIG. 7A is a diagram illustrating an order in which WRGB is emitted in the light emission period of the backlight BL. As shown in the figure, the light emission cycle in which W → R → G → B is sequentially emitted every 1/60 seconds in the entire region of the backlight BL is repeated. In FIG. 7A, the state in which the backlight BL emits white light is indicated by a plain region, and is similarly indicated by a plain region in the drawings subsequent to FIG. FIG. 7B is a diagram showing the timing (BL) at which the backlight BL emits WRGB emission colors and the timing (TS_AL) at which the pixels corresponding to the emission colors are lit on the array substrates S1 and S2 in synchronization with the backlight BL. It is. In the drawing, dotted lines indicate a light emission period in which the backlight BL emits white (W), and a scanning period in which the scanning signal lines GL are sequentially selected in order to select pixels that the array substrates S1 and S2 are driven in white (W). This is also shown in the drawings after FIG. By adding W to RGB, the image quality of the images displayed by the first liquid crystal cell RP and the second liquid crystal cell FP is improved.

  Further, as shown in FIG. 8, a transparent resin P1 may be filled between the first liquid crystal cell RP and the second liquid crystal cell FP which are arranged at a predetermined interval. Filling the transparent resin P1 reduces the change in the refractive index when light transmitted through the first liquid crystal cell RP enters the array substrate S2 of the second liquid crystal cell FP, and is reflected by the array substrate S2 to be stray light. As a result, the contrast is improved.

  In the present embodiment, as described above, a black period in which the backlight BL is turned off and becomes black is inserted between the RGB light emission periods in the light emission period, and the array substrate S1 and the black light are inserted in the black period. S2 is driven. As a result, it becomes difficult to provide light emission from the backlight BL to the pixels being driven, thereby improving the image quality. In addition, the black period in which the backlight BL is black here includes a case where the backlight BL is not completely extinguished and emits light with a significantly lower luminance than the luminance in the light emission period.

[Second Embodiment]
In the first embodiment, as shown in FIG. 4A, the backlight BL is configured so that a common emission color periodically emits light in the entire region of the backlight BL. In the second embodiment, however, The backlight BL is divided into a plurality of blocks so that the phases of the light emission periods of the blocks are different. In the following, the second embodiment will be described in detail, but the description of the same parts as in the first embodiment will be omitted.

  FIG. 9 is a diagram illustrating a state of the backlight BL in the second embodiment. As shown in the figure, a backlight BL including a plurality of light emitting elements LD is equally divided into four blocks in the vertical direction by a partition plate PT. A plurality of light emitting elements LD are assigned to each block so as to have an equal number, and the partition plate PT is provided so as to divide the light emitting area of the backlight BL into four equal parts. The backlight BL in FIG. 9 is configured by arranging a first block B1, a second block B2, a third block B3, and a fourth block B4 from the upper side in the drawing, and each block emits three primary colors of RGB. A light emission period having three light emission periods is provided. FIG. 10 is a schematic diagram of a longitudinal section of the three-dimensional display device in the second embodiment. A vertical viewing angle limiting plate RB is provided between the diffusing plate DS and the first liquid crystal cell RP, thereby suppressing the light emitted by each block from diffusing into adjacent blocks.

  FIG. 11 is a diagram illustrating how the backlight BL emits light in the second embodiment. In the figure, the first block B1 to the fourth block B4 are arranged in the backlight BL as in FIG. The first block B1 to the fourth block B4 are arranged in a direction perpendicular to the extending direction of the scanning signal lines GL of the first liquid crystal cell RP and the second liquid crystal cell FP, In order to emit RGB light sequentially from one to the other, the light emission cycle phase is delayed in order. As shown in FIG. 11, the first block B1 to the fourth block B4 emit red light in order from the upper block to the lower block ((1) to (4) in the figure), and then emit green light. ((5) to (8) in the figure), and thereafter blue light is emitted ((9) to (12) in the figure). Also, before each block emits RGB, a black period is provided, and in the backlight BL, as shown in the figure, light is emitted in each of the RGB emission colors across the block that is black (BLK in the figure). The area to be moved moves from the upper side to the lower side. This prevents light of different emission colors from entering the pixels and improves the image quality.

  In addition, the first liquid crystal cell RP and the second liquid crystal cell FP are configured to selectively drive pixels provided in a region to which light is supplied from each block in synchronization with the light emission cycle in the block. Turn on the light. Since the first liquid crystal cell RP is close to the backlight BL, light is supplied to the first liquid crystal cell RP in a region overlapping with the light emitting block. Therefore, the lighting state of the pixel in the first liquid crystal cell RP corresponds to the state in which each block in the backlight BL emits light, and FIG. 11 is a diagram schematically showing the lighting state of the pixel in the first liquid crystal cell RP. . Specifically, for example, in a state where the second block B2 emits red light (a state denoted by reference numerals (2) to (4) in the drawing), the first liquid crystal cell RP overlaps with the second block B2. The pixel is lit in red in the area to be operated. In addition, in a state where the second block B2 is black (a state denoted by reference numeral (1) in the drawing), no light is supplied to an area overlapping the second block B2, and thus the pixel is not lit. The first liquid crystal cell RP is selected in order to light up pixels in the region overlapping with the second block B2 in accordance with the timing when the second block B2 emits light in the state marked with (1) in the figure. Drive.

  Since the second liquid crystal cell FP is provided at a position away from the backlight BL via the first liquid crystal cell RP, light is diffused and supplied from the backlight BL. For this reason, the area where light is supplied from each block is wider than the area overlapping each block. FIG. 12A is a diagram schematically showing a lighting state of the second liquid crystal cell FP corresponding to the state of the backlight BL denoted by reference numeral (1) in FIG. A region R in FIG. 12A indicates a region in which pixels that are selectively driven in advance by supplying a scanning signal and a video signal are lit in red. Similarly, a region B in FIG. 12A indicates a region in which pixels that are selectively driven in advance are lit in blue, and a region BLK is provided between the region R and the region B. In this region BLK, the lighting of the pixels is eliminated and the region does not have luminance. In particular, in the second liquid crystal cell FP, as shown in the figure, the region where the pixel is lit corresponding to the red emission color by the first block B1 is black from the region overlapping the first block B1. Expanded to the second block B2 side. Similarly, the region where the pixel is lit corresponding to the blue emission color by the third block B3 is also expanded from the region overlapping with the third block B3 to the second block B2 which is black. This makes the boundary between the black block and the light emitting block in the backlight BL inconspicuous when the viewpoint of the observer fluctuates. Note that elimination of lighting of the pixel means that the electric field between the pixel electrode PX and the counter electrode is reset, and the state before the voltage is applied to the pixel electrode PX by the video signal line DL is returned. In the area where the lighting of the pixels is eliminated, the luminance is almost zero in the second liquid crystal cell FP.

  FIG. 12B is a diagram illustrating a state in which pixels are lit in accordance with light emission from the backlight BL in the second liquid crystal cell FP in the second embodiment. Each lighting state in FIG. 12B is described corresponding to the light emission state of each block in FIG. As shown in FIG. 12B, in each lighting state, an area where a pixel is lit is extended from an area overlapping with a block that emits light in RGB to the block that becomes black. In the second liquid crystal cell FP, as shown in FIG. 12B, in the region overlapping with the block that emits the emission color, and in the region adjacent to the region and overlapping with a part of the block that becomes black, the emission color. In response to this, the pixel is turned on. 11 and 12B show how the backlight BL (and the first liquid crystal cell RP) and the second liquid crystal cell FP are driven in synchronization. Regarding the manner in which they are synchronized, first, the second liquid crystal cell FP drives the pixels in the region overlapping with a part of the first block B1 ((1-1) in FIG. 12B), and then the second liquid crystal cell FP. The pixels in the region overlapping with a part of the two blocks B2 are driven ((1-2) in FIG. 12B). Here, simultaneously with driving of the pixels in the second liquid crystal cell FP, the first liquid crystal cell RP drives the pixels in the region overlapping with the first block B1. Then, after the pixels of the first liquid crystal cell RP and the second liquid crystal cell FP are driven, the first block B1 emits light ((1) in FIG. 11).

  Here, the second liquid crystal cell FP is provided with a block-corresponding drive region for driving pixels corresponding to RGB light emission by each block, as shown in each drawing of FIG. FIG. 12C is a diagram for explaining a block-corresponding drive region provided in the second liquid crystal cell FP in the second embodiment. As shown in the figure, in the second liquid crystal cell FP, the first block corresponding drive region D1 for driving the pixel corresponding to the light emission by the first block B1, and the pixel driving for the light emission by the second block B2. The second block corresponding drive area D2 to be driven, the third block corresponding drive area D3 for driving the pixel corresponding to the light emission by the third block B3, and the fourth block corresponding drive for driving the pixel corresponding to the light emission by the fourth block B4 A region D4 is provided. Here, in the block corresponding to the driving of the pixels in the block corresponding drive area (hereinafter referred to as the corresponding block), if there is an adjacent block with a phase later than the corresponding block, the block corresponding drive area is The phase is shifted from the region overlapping the corresponding block by a predetermined width. As shown in FIG. 12C, the first block corresponding drive area D1 includes a shift area SF1 that overlaps a part of the second block B2, a lighting continuation area KP1 and a lighting cancellation area OF1 that overlap a part of the first block B1. In addition, the second block corresponding drive region D2 and the third block corresponding drive region are configured to include similar regions. In the second embodiment, there is no adjacent block with a phase lag behind that of the fourth block B4. Therefore, the fourth block corresponding drive region D4 overlaps with a part of the fourth block B4 (fourth block B4). Are provided in a region excluding the shift region SF3). Details of each area shown in FIG. 12C will be described with reference to FIG.

  FIG. 13 is a diagram illustrating timings at which pixels provided in regions overlapping the first block B1 to the fourth block B4 in the backlight BL and the respective blocks in the first liquid crystal cell RP and the second liquid crystal cell FP are driven. It is. In the figure, the timing (BL1 to BL4) at which the first block B1 to the fourth block B4 emit RGB colors and the timing at which the first liquid crystal cell RP drives the pixels in the area overlapping with each block (T1− 1 to T1-4) and timings (T2-1 to T2-4) for driving the pixels in the region where the second liquid crystal cell RP overlaps each block. In addition, the timing at which each block receives a turn-off signal (BLKS) in order to start the black period after the end of each light emission period is also shown in FIG. Here, the processing performed by the backlight BL, the first liquid crystal cell RP, and the second liquid crystal cell FP will be described in time series according to FIG. First, in the black period provided before the red light emission period of the first block B1, the first liquid crystal cell RP drives the pixel to be lit red in the region overlapping with the first block B1 ((1 in the figure)). )). On the other hand, the second liquid crystal cell FP drives the pixels in the preceding drive area AD overlapping with the first block B1 in advance (12-2), and then the lighting continuation area KP1 overlapping with the first block B1 and The pixels in the lighting elimination area OF1 are driven ((1-1) in the figure), and further, the pixels in the shift area SF1 overlapping with the second block B2 are driven ((1-2) in the figure). After the black period ends, the first block B1 emits red light, and the pixels driven in the first liquid crystal cell RP and the second liquid crystal cell FP are selectively lit in red ((1), ( 12-2), (1-1), (1-2)). Then, when the first block B1 receives the turn-off signal, the red light emission period ends and the black period starts. At this time, the first liquid crystal cell RP cancels the lighting state of the pixel in the region overlapping with the first block B1, and then drives the pixel to be lit in green ((5) in the figure). On the other hand, the second liquid crystal cell FP first keeps the pixels in the preceding drive area AD, the lighting continuation area KP1, and the shift area SF1 lit until red light emission by the first block B1 is completed. Then, after the black period starts in the first block B1, the pixels in the lighting elimination area OF1 are driven so that light cannot be transmitted, and the pixels in the preceding driving area AD are driven to light in green (in the figure ( 4-2)). Further, the second liquid crystal cell FP keeps the pixels in the lighting continuation region KP1 and the shift region SF1 lit until red light emission by the second block B2 ends. Then, after the start of the black period of the second block B2 and before the start of the green light emission period of the first block B1, driving is performed to light the pixels in the lighting elimination area OF1, the lighting continuation area KP1, and the shift area SF1 in green (FIG. Middle (5-1) (5-2)). When the green light emission period of the first block B1 ends and the black period starts, the first liquid crystal cell RP and the second liquid crystal cell FP have pixels for lighting in blue as in the above case. Each is driven ((8-2), (9), (9-2), (9-1) in the figure).

  In the above, the processing centering on the first block B1 has been described, but the second block B2 to the fourth block B4 are also delayed by a predetermined phase with respect to the adjacent blocks on the upper side in the figure as shown in FIG. The first liquid crystal cell RP and the second liquid crystal cell FP also drive the pixels in synchronization with the light emission of each block of the backlight BL. The first block B1 to the fourth block B4 are arranged in this order from the upper side, and are provided so that the phase difference between the blocks is shorter than the black period provided before each emission color is emitted. For this reason, for example, when the black period starts in the second block B2, the adjacent third block B3 is delayed in phase and becomes black during the black period of the second block B2. The light emission period of the second block B2 starts while the third block B3 is in the black period. As a result, as shown in the timing chart of FIG. 13 and FIG. 11, the light emission period of each block is provided so that the blocks that emit light with different light emission colors at the same time are separated by the black blocks. If the phase difference between the first block B1 and the second block B2 is longer than the total of the red light emission period and the black period before green light emission, the green light emission period of the first block B1 The red light emission period of the second block B2 is started, and green and red may be adjacent to each other. Further, when the phase difference between the first block B1 and the second block B2 is longer than the black period before red light emission, the blue light emission period of the second block B2 in the red light emission period of the first block B1. May not end and red and blue may be adjacent.

  Since the phase difference between adjacent blocks is set to be shorter than the black period, as shown in FIG. 13, during the period when two adjacent blocks are black, the second liquid crystal cell FP A pixel in a block corresponding drive region straddling two blocks is driven. Specifically, in the second liquid crystal cell FP, the pixels provided in the shift area SF1, the lighting continuation area KP1, and the lighting cancellation area OF1 in accordance with the timing when both the first block B1 and the second block B2 are black. Drive.

  As described above, the backlight BL in the second embodiment emits light by being divided into a plurality of blocks. Each block is arranged from one direction in the order in which the phase is delayed, and the backlight BL emits light so as to move the light emitting region according to each emission color in the direction in which the phase is delayed. The first liquid crystal cell RP and the second liquid crystal cell FP selectively drive the pixels provided in the region to which light is supplied by the blocks in accordance with the light emission color in synchronization with the light emission by each block.

  In addition, in the light emission period of the backlight BL in the second embodiment, three light emission periods are provided to emit the three primary colors of RGB. For example, a light emission period of emitting white (W) may be further provided. Good. Here, FIG. 14 is a diagram showing how each block in the backlight BL emits WRGB. As shown in the figure, each block is provided with a light emission period in which W → R → G → B is emitted in order at different timings, and black and white areas are emitted from the upper side to the lower side of WRGB. Move with. Similarly to the case of the first embodiment, the lighting state of the pixels in the first liquid crystal cell RP is schematically shown in FIG. 14, and the lighting state of the pixels in the second liquid crystal cell FP is shown in FIG. . As shown in FIG. 15, in the second liquid crystal cell FP, an area where a pixel is lit is expanded on the black block side. FIG. 16 shows the timing at which the pixels provided in the first block B1 to the fourth block B4 that emit WRBG and the blocks that overlap the respective blocks in the first liquid crystal cell RP and the second liquid crystal cell FP are driven. FIG. In the figure, the timing (BL1 to BL4) at which each block emits the WRGB emission color, and the timing (T1-1) at which the first liquid crystal cell RP and the second liquid crystal cell FP drive the pixels in synchronization with each block. ~ T1-4 and T2-1 to T2-4).

  The backlight BL in the second embodiment is a direct type backlight, but may be a side edge type backlight BL as shown in FIG. In the side edge type backlight BL shown in the figure, rectangular light guide plates LG corresponding to each block are equally provided, and four light emitting elements LD are arranged on both side surfaces of the light guide plate LG. The FIG. 18 is a diagram showing a state in which the three-dimensional display device is configured including the side edge type backlight BL as shown in FIG. In the figure, the backlight BL is divided into four blocks by four light guide plates LG provided so as to overlap the display areas of the first liquid crystal cell and the second liquid crystal cell. The backlight BL includes four light guide plates LG, a light emitting element LD, a prism sheet PS, a diffusion sheet DS, and a reflection sheet RS provided on the side surface of each light guide plate LG. The light emitted from the light emitting element LD is guided to the light guide plate LG and the reflection sheet RS provided on the bottom surface of the light guide plate LG, and the luminance is uniformed through the prism sheet PS and the diffusion sheet DS. One liquid crystal cell RP is provided. Each light emitting element LD is provided with a light emission period as in the case of a direct type backlight.

  Note that the backlight BL in the second embodiment is divided into a plurality of blocks in a direction perpendicular to the direction in which the scanning signal lines GL extend, and the plurality of blocks are arranged in a strip shape in parallel with the scanning signal lines GL. The In the second liquid crystal cell FP, each block-corresponding drive region is provided in a strip shape in parallel with the scanning signal line GL, and each block-corresponding driving region is arranged in a direction in which the scanning signal line GL is laid as shown in FIG. 12C. On the other hand, it is divided vertically. In the second embodiment, as shown in FIG. 12C, each of the shift areas SF1 to SF3, the lighting continuation areas KP1 to KP4, the lighting cancellation areas OF1 to OF4, and the preceding driving area AD is divided by substantially the same width. Approximately the same number of scanning signal lines GL correspond to each other. Here, for example, when the observer's viewpoint is located on the upper side of the three-dimensional display device, the widths of the lighting continuation regions KP1 to KP3 may be wider than the widths of the shift regions SF1 to SF3 and the preceding drive region AD. Good. Further, when the light diffused from each block and provided to the second liquid crystal cell FP does not reach the central part of the adjacent block, the light shielding areas OF1 to OF4 are not provided, and the block corresponding drive areas D1 to D1 are provided. In D4, the shift area and the lighting continuation area may be provided to have the same width.

  Note that, in the first liquid crystal cell RP in the second embodiment, as schematically illustrated in FIG. 11, pixels in an area overlapping with each block are lit. Here, in the case where light is diffused from each block and provided to the first liquid crystal cell RP, as in the second liquid crystal cell FP, an area in which a pixel is lit on the side of the black block is shown in FIG. 12B. You may extend to. Similarly to the second liquid crystal cell FP, the block driving region may be provided by shifting the region for driving the pixel corresponding to the block by a predetermined width toward the phase lagging side. At this time, since the second liquid crystal cell FP is separated from the backlight BL by the distance from the first liquid crystal cell RP, the widths of the shift regions SF1 to SF3 and the lighting continuation regions KP1 to KP3 are set to the first liquid crystal cell RP. The second liquid crystal cell FP is made larger than the second liquid crystal cell FP. The widths of the shift areas SF1 to SF3 and the lighting sustaining areas KP1 to KP3 may be changed between the first liquid crystal cell RP and the second liquid crystal cell FP as a function of the distance from the backlight BL.

  In the second embodiment, the backlight BL is divided into four blocks in a direction perpendicular to the direction in which each scanning signal line GL extends. However, the backlight BL may be divided into more blocks. The blocks may be divided so as to be arranged in a matrix. When the blocks are arranged in a matrix, for example, the light emission periods provided in the respective blocks are delayed from one to the other in the row direction and from one to the other in the column direction. The light emission period of each block is provided so that the phase is sequentially delayed in the row direction, and the block located at the head of the next row is provided so that the phase is delayed after the block in the last column in the row direction. In this case as well, the light emission period of each block and the phase difference between adjacent blocks are provided so that the black block is interposed between the blocks emitting light of different emission colors. Further, in the second embodiment, the blocks are provided such that the phase difference is equal between the blocks, and the light emission period and the black period of each light emission color in the light emission cycle are constant. However, the length of the light emission period or the black period may be changed for each light emission color, or may be provided so that the phase difference of the light emission period differs between the blocks.

[Third embodiment]
In the first embodiment, as shown in the timing chart of TS-AS in FIG. 4B, in the first liquid crystal cell RP and the second liquid crystal cell FP, all the scanning lines are scanned during the black period of the backlight BL, and thereafter The backlight BL is emitted. On the other hand, in the third embodiment, as shown in FIG. 19, the first liquid crystal cell RP and the second liquid crystal cell FP are both divided into two scanning regions, and these two scanning regions are black in the backlight BL. Scanning is performed individually during the period, and then the backlight BL emits light. In the following, the third embodiment will be described in detail, but the description of the same parts as in the first embodiment will be omitted.

  FIG. 20 is a diagram schematically showing an equivalent circuit diagram of the array substrate S1 of the first liquid crystal cell RP and the array substrate S2 of the second liquid crystal cell FP. As shown in the figure, the pixel areas of the first liquid crystal cell RP and the second liquid crystal cell FP are both divided into a first scanning area and a second scanning area. The first scanning region is provided in the upper half of the pixel region, and the first scanning signal line group including the plurality of scanning signal lines GL1 and the first video signal line group including the plurality of video signal lines DL1 are orthogonal to each other. Thus, it is partitioned into a matrix. Similarly, the second scanning region is provided in the lower half of the pixel region, and a second scanning signal line group including a plurality of scanning signal lines GL2 and a second video signal line group including a plurality of video signal lines DL2. Are orthogonally divided into a matrix. The first scanning region and the second scanning region divide the pixel region so that the scanning signal lines GL extending in the horizontal direction in the drawing are divided into the first scanning signal line GL1 group and the second scanning signal line GL2 group. The boundary between the first scanning region and the second scanning region is provided in a direction parallel to the scanning signal line GL. Here, the first scanning signal line GL1 is connected to the first scanning line driving circuit GDR1, and the second scanning signal line GL2 is connected to the second scanning line driving circuit. Further, the first video line drive circuit DDR1 is connected to the first video signal line DL1, and the second video line drive circuit DDR2 is connected to the second video signal line DL2. The first scanning line driving circuit GDR1 provides a scanning signal by sequentially selecting the scanning signal lines GL1 in the first scanning signal line group. Similarly, the second scanning line drive circuit GDR2 also provides the scanning signal by sequentially selecting the scanning signal line GL2 in the second scanning signal line group. At this time, the video line driving circuit DDR1 and the video line driving circuit DDR2 supply the video signals and drive the pixels in accordance with the timing at which the scanning signal line GL1 and the scanning signal line GL2 are selected. That is, in the first scanning area and the second scanning area, scanning signals are simultaneously supplied to the first scanning signal line GL1 group and the second scanning signal line GL2 group, and the video signals corresponding to the respective scanning signal lines are the first. The signals are supplied to the first video signal line DL1 group and the second video signal line DL2 group, and the pixels are simultaneously driven in the two regions.

  In the third embodiment, the first scanning region and the second scanning region are divided into two above and below the pixel region. By separately scanning the first scanning region and the second scanning region, the scanning time can be reduced and the light emission period of the backlight BL can be made longer than when the scanning signal lines in the entire pixel region are sequentially selected and scanned. it can. Note that when liquid crystal molecules having a slow response speed are used for the liquid crystal layer LC, the scanning time tends to be long, and the pixel region is composed of two or more scanning regions in order to further improve the light emission efficiency of the backlight. You may make it do. In the third embodiment, the first scanning region and the second scanning region are divided into two equal parts in the vertical direction. However, even if the widths of the first scanning region and the second scanning region are different, the scanning time Will be less.

[Fourth Embodiment]
In the third embodiment, the backlight BL is configured so that the common emission color is emitted in a predetermined order in the entire region of the backlight BL. However, the fourth embodiment is the same as the second embodiment. Further, the backlight BL is divided into a plurality of blocks, and the phases of the light emission periods of the blocks are arranged so as to be delayed in order. In the fourth embodiment, the pixel areas of the first liquid crystal cell RP and the second liquid crystal cell FP are configured to include a first scanning area and a second scanning area that are individually scanned. Here, the backlight BL is divided into a first backlight area that overlaps and corresponds to the first scanning area, and a second backlight area that overlaps and corresponds to the second scanning area. The backlight area and the second backlight area are each divided into a plurality of blocks. Pixels provided in the first scanning region and the second scanning region are turned on in synchronization with light emission by each block. In the following, the fourth embodiment will be described in detail, but description of portions that are substantially the same as those of the first to third embodiments will be omitted.

  FIG. 21 is a diagram illustrating how the backlight BL emits light according to the fourth embodiment. In the fourth embodiment, two blocks are arranged in the vertical direction in each of the first backlight region and the second backlight region. In the fourth embodiment, as in the second embodiment, the backlight BL is configured by arranging the first block B1 to the fourth block B4 in the vertical direction, and the first block B1 to the fourth block B4 are arranged. In order to emit RGB light from one side to the other side in accordance with the order in which they are performed, the phases of the light emission periods are sequentially delayed.

  Particularly in the fourth embodiment, the scanning signal lines are separately scanned in order in the first scanning region and the second scanning region, and the blocks of the first backlight region and the second backlight region are also sequentially corresponding to this. Flashes on. In the first backlight region and the second backlight region, one of the emission colors is emitted from one side to the other side in the order in which the blocks are arranged in the vertical direction. At this time, light emission of the emission color on the other side is performed in accordance with the timing at which one of the emission colors is sequentially emitted in the first backlight region and the second backlight region. The phase of the light emission period provided in each block is set so as to start. Further, in the first backlight region, light emission of a light emission color different from any one of the light emission colors is started in each block in accordance with the timing. Specifically, after the first block B1 and the second block B2 in the first backlight region emit red light in order from the upper side to the lower side, the first block B1 and the second block B2 are lower from the upper side. The green light is emitted sequentially toward the side, and the third block B3 and the fourth block B4 emit red light sequentially from the upper side to the lower side.

  FIG. 21 is a diagram illustrating a state in which each block of the backlight in the fourth embodiment emits light. As shown in the figure, the first block B1 to the fourth block B4 of the backlight BL emit red light in order from the upper block to the lower block ((1) to (4) in the figure), and thereafter Is caused to emit green light ((3) to (6) in the figure), and thereafter blue light is emitted ((5) to (6), (1) to (2) in the figure)). Also, as shown in the figure, when the first block B1 and the third block B3 emit light simultaneously with different emission colors, the second block B2 and the fourth block B4 are black ((1) in the figure, (3), (5)). Further, when the second block B2 and the fourth block B4 emit light simultaneously with different emission colors, the first block B1 and the third block B3 are black ((2), (4), (6) in the figure). The blocks that emit light with different emission colors are isolated by the blocks that become black. The first block B1 emits a different emission color according to the timing at which the third block B3 starts to emit light according to the emission color emitted by the second block B2.

  Pixels provided in the first scanning region and the second scanning region are turned on in synchronization with light emission by each block in the backlight BL. Specifically, first, in the first liquid crystal cell RP, the pixels in the areas overlapping with the first block B1 to the fourth block B4 are respectively displayed in each block, as schematically illustrated in FIG. Drives corresponding to the emission color emitted by. In the first scanning region of the first liquid crystal cell RP, pixels are lit in synchronization with the light emission periods of the first block B1 and the second block B2, and the second scanning region emits light of the third block B3 and the fourth block B4. The pixel is turned on in synchronization with the cycle. On the other hand, since the pixels in the second liquid crystal cell FP are provided by diffusing light from the backlight BL, the pixels in a region wider than the region overlapping with each of the first block B1 to the fourth block B4 Driven corresponding to the block. FIG. 22 is a diagram illustrating a state in which pixels are lit in response to light emission from the backlight BL in the second liquid crystal cell FP. Each lighting state in FIG. 22 is described corresponding to the light emission state of each block in FIG. Further, as shown in the figure, in each of the lighting states, the area where the pixel is lit is extended from the area overlapping with the block emitting light of RGB to the black block side. Similarly to the second embodiment, a block-corresponding drive region for driving pixels corresponding to RGB light emission by each block is provided as shown in FIG. 12C.

  Here, FIG. 23 is a diagram illustrating timings at which pixels provided in regions overlapping with the first block B1 to the fourth block B4 and the respective blocks in the first liquid crystal cell RP and the second liquid crystal cell FP are driven. . Particularly in the fourth embodiment, the scanning signal lines are scanned simultaneously in the first scanning region and the second scanning region, and light is emitted in the first backlight region and the second backlight region in synchronization therewith. Specifically, first, during the black period of the second block B2 and the fourth block B4, the red light emission period of the first block B1 and the blue light emission period of the third block B3 start ((1) in the figure). . Then, in synchronism with these blocks, the pixels in the area overlapping the first block B1 and the third block B3 of the first liquid crystal cell RP are driven ((1) in the figure), and the block corresponding to the second liquid crystal cell FP is supported. The pixels provided in the drive regions D1 and D3 are driven ((1-1) and (1-2) in the figure). At this time, the pixels in the preceding drive area AD and the shift area SF2 are driven in advance before the pixels provided in the block corresponding drive areas D1 and D3 are driven (see (6-2) in the figure). ). Next, the black period of the first block B1 and the third block B3 starts, and during the black period of the second block B2 and the fourth block B4, the second block B2 and the fourth block of the first liquid crystal cell RP. The pixels in the area overlapping with B4 are driven ((2) in the figure). Similarly, the pixels provided in the block corresponding drive regions D2 and D4 of the second liquid crystal cell FP are driven ((2-1), (2-2) in the figure). Thereafter, during the black period of the first block B1 and the third block B3, the red light emission period of the second block B2 and the blue light emission period of the fourth block B4 are started. After the light emission of the second block B2 and the fourth block B4, the green light emission period of the first block B1 and the red light emission period of the third block B3 are started. The pixels of the first liquid crystal cell RP and the second liquid crystal cell FP are turned on ((3), (4), (5), (6), etc. in the figure). In this way, during the black period of each block, the black period of the block whose phase is delayed with respect to each block starts, and thereafter, the pixels in the area overlapping with the block whose phase is delayed are driven. The light emission period of the block whose phase is delayed starts. In the fourth embodiment, at the timing when all the blocks are black, the pixels of the first liquid crystal cell RP and the second liquid crystal cell FP are driven so that the black blocks and the light emitting blocks are alternated. The light emission period of each block is provided. The phase of the third block B3 is such that the third block emits one emission color after all the blocks in the first backlight region emit one emission color, so that the third block B3 emits the one emission color. 1 / (number of emission colors). The first backlight area and the second backlight area may be divided into more blocks. In this case, the black blocks are interposed between the blocks that emit light so that A light emission period is provided.

  In addition, in the light emission period in each block of the fourth embodiment, three light emission periods are provided in order to emit the three primary colors of RGB. For example, a light emission period in which white (W) light is emitted may be further provided. . Here, FIG. 24 is a diagram showing how each block in the backlight BL emits WRGB. As shown in the figure, the light emission cycle in which W → R → G → B is sequentially emitted at different phases in each block is repeated, and the region emitting light in each color of WRGB moves from the upper side to the lower side across black. . Similarly to the above case, the lighting state of the pixel in the first liquid crystal cell RP is schematically shown in FIG. 24, and the lighting state of the pixel in the second liquid crystal cell FP is also shown in FIG. In the second liquid crystal cell FP, the area where the pixel is lit is extended to the black block side. In addition, FIG. 26 illustrates the timing at which the pixels provided in the first block B1 to fourth block B4 that emit WRBG, and the pixels provided in the areas overlapping with the respective blocks in the first liquid crystal cell RP and the second liquid crystal cell FP are driven. FIG. In FIG. 26, the timing (BL1 to BL4) at which each block emits the WRGB emission color and the timing at which the pixels corresponding to the emission color are turned on in the first liquid crystal cell RP and the second liquid crystal cell FP in synchronization with each block. (T1-1 to T1-4 and T2-1 to T2-4) are shown.

  The three-dimensional display device according to each embodiment of the present invention described above is not limited by the above-described embodiment, and may be implemented in different forms within the scope of the technical idea, or each of the above-described embodiments. It is also possible to implement a combination of the forms disclosed in.

  RP first liquid crystal cell, FP second liquid crystal cell, F1, F2 counter substrate, LC1, LC2 liquid crystal layer, S1, S2 array substrate, PL1 lower polarizing plate, PL2 upper polarizing plate, BL backlight, LD light emitting element, MF metal Frame, RS reflection sheet, PS prism sheet, DS diffusion sheet, diffusion plate, GDR scanning line drive circuit, DDR video line drive circuit, GL scanning signal line, DL video signal line, PX pixel electrode, LG light guide plate, P1 filling resin , PT partition plate, B1 to B4 first to fourth blocks, RB vertical viewing angle limiting plate, R red, G green, B blue, W white, BLK black.

Claims (13)

With backlight,
A backlight driving circuit for emitting the backlight in a plurality of emission colors according to a predetermined light emission period ;
A first liquid crystal cell;
Depending on the light emission by the backlight, the first liquid crystal cell driving circuit causes driving the pixels of the first liquid crystal cell,
A second liquid crystal cell disposed on the opposite side of the backlight with respect to the first liquid crystal cell and spaced apart from the first liquid crystal cell ;
Depending on the light emission by the backlight, wherein the second liquid crystal cell driving circuit for driving the pixels of the second liquid crystal cell,
The backlight, the first liquid crystal cell, and the second liquid crystal cell are provided so that light from the backlight passes through the first liquid crystal cell and is supplied to the second liquid crystal cell. And
Wherein the first liquid crystal cell driving circuit second liquid crystal cell driving circuit, projecting Kagee image of the three-dimensional image to be provided to the viewer to display by changing the brightness from each other, the second liquid crystal and the first liquid crystal cell Drive the cell,
In the light emission period, a light emission period for emitting one of the light emission colors and a black period for turning black before the light emission period starts are provided for each of the light emission colors.
The first liquid crystal cell driving circuit and the second liquid crystal cell driving circuit drive a pixel to be lit in the light emission period according to the one emission color in the black period,
The backlight is configured by arranging a plurality of blocks,
The backlight driving circuit causes each of the blocks to emit light according to the light emission cycle whose phase is delayed according to the arrangement of the blocks,
The first liquid crystal cell driving circuit and the second liquid crystal cell driving circuit drive a pixel provided in a region to which light is supplied from each of the blocks during the black period in each of the blocks, and Lit during the light emission period in each,
The backlight driving circuit causes each of the blocks to emit light so that blocks that emit light with different emission colors at the same time are separated by black blocks,
The second liquid crystal cell is supplied with light diffused from one of the blocks,
In the second liquid crystal cell driving circuit, an area in which a pixel is turned on according to the color of light emitted from the one block is a black block adjacent to the one block from an area overlapping the one block. Driving the second liquid crystal cell to extend to the side of
In the first liquid crystal cell driving circuit and the second liquid crystal cell driving circuit, an area in which a pixel is lit in accordance with the emission color in the second liquid crystal cell has a pixel in accordance with the emission color in the first liquid crystal cell. Driving the first liquid crystal cell and the second liquid crystal cell to be wider than a region to be lit;
A three-dimensional display device characterized by that. The three-dimensional display device according to claim 1,
The backlight driving circuit starts the black period of an adjacent block on the side of which the phase is delayed in each of the blocks in the black period of each of the blocks, and after the end of the black period of each of the blocks, By starting the emission period in which each of the blocks emits the one emission color in the order in which the phase is delayed according to the arrangement, blocks that emit light of different emission colors at the same time are separated by blocks that are black. Illuminate each of the blocks;
A three-dimensional display device characterized by that. The three-dimensional display device according to claim 2 ,
The second liquid crystal cell is
A block-corresponding drive region for driving the pixels in response to light emission by each of the blocks;
When a corresponding block corresponding to driving of pixels in the block corresponding driving area is adjacent to another block whose light emission period is delayed from the corresponding block, the block corresponding driving area is one of the corresponding blocks. Provided with a predetermined width shift on the side of the other block while overlapping with the portion,
Said second liquid crystal cell driving circuit, the pixel of the block-corresponding driving region is driven in the black period of the corresponding block,
A three-dimensional display device characterized by that. The three-dimensional display device according to claim 3 ,
The block corresponding drive region is
A shift area that is shifted by a predetermined width toward the other block and avoids duplication with the corresponding block;
A lighting continuation region that is provided adjacent to the shift region so as to overlap with the corresponding block, and in which a pixel continues to be lit in a black period after the light emission period of the corresponding block ends,
A lighting cancellation region that is provided adjacent to the lighting maintenance region so as to overlap with the corresponding block, and in which the lighting of the pixel is canceled in a black period after the light emission period of the corresponding block is completed,
The second liquid crystal cell driving circuit is configured to cause the pixels in the shift area and the pixels in the lighting continuation area to emit light in the black color period after the light emission period of the corresponding block ends. Is lit according to the emission color,
A three-dimensional display device characterized by that. The three-dimensional display device according to claim 3 ,
The second liquid crystal cell driving circuit corresponds to the emission color of pixels in the block corresponding driving area provided with a predetermined width shift while the corresponding block and the other block are in the black period. to dynamic driving Te,
A three-dimensional display device characterized by that. The three-dimensional display device according to claim 1,
The emission color includes an emission color generated by mixing at least two of the emission colors.
A three-dimensional display device characterized by that. The three-dimensional display device according to claim 1,
A transparent resin is filled between the first liquid crystal cell and the second liquid crystal cell.
A three-dimensional display device characterized by that. The three-dimensional display device according to claim 1 ,
In the first liquid crystal cell and the second liquid crystal cell, a plurality of scanning signal lines are laid in parallel in a predetermined direction, and a pixel connected to the scanning signal line is supplied according to the emission color by supplying a scanning signal. Each including an array substrate to be driven,
The blocks are arranged in a direction perpendicular to the predetermined direction,
A field limiting member is provided between the backlight and the first liquid crystal panel to limit light from diffusing in the vertical direction from each of the blocks.
A three-dimensional display device characterized by that. The three-dimensional display device according to claim 1,
The first liquid crystal cell and the second liquid crystal cell are partitioned by a plurality of scanning signal lines laid in parallel to a predetermined direction and a plurality of video signal lines laid in parallel to the vertical direction of the predetermined direction. Each including an array substrate having a pixel region;
The scanning signal lines include a first scanning signal line group and a second scanning signal line group,
The video signal lines include a first video signal line group orthogonal to the first scanning signal line group and a second video signal line group orthogonal to the second scanning signal line group,
The pixel regions in the first liquid crystal cell and the second liquid crystal cell are divided into the first scanning region, the second scanning signal line group, and the first scanning signal line group and the first video signal line group, respectively. Comprising a second scanning region partitioned by a second video signal line group,
A boundary between the first scanning region and the second scanning region is provided to be parallel to the scanning signal line,
Said first liquid crystal cell driving circuit and the second liquid crystal cell driving circuit, the the first scan signal line group and the second scanning signal line group, and simultaneously supplies a separate scan signal to each of the first scan region the pixels in the lit by the video signal from the first supply scan signals to the scan signal line group and the first video signal line group, the pixels in the second scanning area, the second scanning signal line group lit by the supplied scan signal and the video signal from the second video signal line group,
A three-dimensional display device characterized by that. The three-dimensional display device according to claim 9 ,
The backlight includes a first backlight area corresponding to the first scanning area, and a second backlight area corresponding to the second scanning area,
The first backlight region, some blocks of the plurality of blocks are arranged in this said vertical direction,
The second backlight region, the remaining part of the block of the plurality of blocks are arranged in this said vertical direction,
The backlight drive circuit, each of the blocks in the first backlight region and the second backlight region, according to the previous SL-emitting period in which the phase Ru delayed vertically arranged sequentially in the vertical direction The one emission color is emitted in the order of arrangement,
The backlight drive circuit, the pixels provided in the first scanning area, lit in response to the emission color in synchronization with the light emission by each of the blocks in the first backlight region, the second scanning region the pixel provided in, turned on in response to the emission color in synchronization with the light emission by each of the blocks in the second backlight region,
A three-dimensional display device characterized by that. The three-dimensional display device according to claim 10 ,
The backlight driving circuit includes:
It said block most phase is slow out of the block in the first backlight region, the After emitting light the one light emitting color,
To start light emission by most the phase is advanced block one emission color different from the emission color of the blocks in the first backlight region,
Most phase advanced blocks among the blocks in the second backlight region, causes start light emission by said one emission color,
A three-dimensional display device characterized by that. The three-dimensional display device according to claim 11 ,
The backlight driving circuit includes:
The block emitted simultaneously either before Symbol emission color, a block to be black becomes alternating, a block that is the emission to thus isolate the block to be said black, the first backlight region Each of the block in the second backlight region and the block in the second backlight region,
A three-dimensional display device characterized by that. The three-dimensional display device according to claim 12 ,
The first backlight region is configured by arranging a first block and a second block from the vertical direction,
The second backlight area is configured by arranging a third block and a fourth block provided adjacent to the second block from the vertical direction,
The backlight drive circuit includes the first block, the second block, the third block, and the fourth block , and the emission color is delayed in phase from the first block to the fourth block. To emit light according to the light emission cycle ,
The backlight driving circuit, when the said first block the third block emits light, the second block and the fourth block as a black,
The second when the block and the fourth block emits light to the third block and the first block and black,
A three-dimensional display device characterized by that.

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