WO2013047099A1

WO2013047099A1 - Display device

Info

Publication number: WO2013047099A1
Application number: PCT/JP2012/072392
Authority: WO
Inventors: 増田　岳志
Original assignee: シャープ株式会社
Priority date: 2011-09-30
Filing date: 2012-09-03
Publication date: 2013-04-04

Abstract

A display device is achieved that has high productivity and is able to suppress crosstalk in a three-dimensional image display to allow a three-dimensional image to be seen clearly. A liquid crystal display device (1) comprises a display control part (data converting part (2), display signal generating part (3)) that includes a first pixel and a second pixel, a dark sub-pixel of the first pixel and a bright sub-pixel of the second pixel being arranged at a position corresponding to a border between two types of polarization regions, and that displays an image at the first pixel and produces a dark display at the second pixel when displaying a three-dimensional image.

Description

Display device

The present invention relates to a liquid crystal display device capable of displaying a two-dimensional image and a three-dimensional image.

As a method for allowing the user to perceive an image displayed on the screen as a stereoscopic three-dimensional image, there is a method using a display device that makes the polarization state of the left-eye pixel displayed on the screen different from the polarization state of the right-eye pixel. is there. By viewing the screen through glasses with a left-eye lens that allows only light from the left-eye pixel to pass and a right-eye lens that allows only light from the right-eye pixel to pass, The original image can be perceived. The difference between the left and right polarization states may be a difference in polarization direction or a difference in the rotation direction of circularly polarized light.

In order to change the polarization state of the left and right images, two types of polarization control filters (for example, polarizing plates) are arranged so as to correspond to the left eye pixel and the right eye pixel, respectively, and the polarization of the left eye image There is a display device in which the direction and the polarization direction of the right-eye image are different. However, in the conventional configuration in which the polarization control filters are simply arranged, the division of the left-eye image and the right-eye image near the boundary of the polarization control filter whose polarization direction changes is insufficient.

FIG. 17 is a plan view schematically showing a part of the arrangement of the polarization control filter and the pixels of the conventional display device. FIG. 17 shows a correspondence relationship between the color display layer 101 and the polarization control filter 102 overlapping the color display layer 101. The left and

right polarization regions

102a and 102b of the polarization control filter 102 extend in the horizontal direction (row direction) of the screen, and are alternately arranged in the vertical direction (column direction). The color display layer 101 has pixels of three colors of RBG corresponding to the right and

left polarization regions

102a and 102b. For example, one left-eye pixel representing full color corresponds to a region surrounded by a dotted line shown in FIG.

FIG. 18 is a sectional view schematically showing a longitudinal section of a conventional display device. Here, a cross section along a pixel of B (blue) color is shown. A color display layer 101 is provided on the glass substrate 103, and another glass substrate 104 is provided on the color display layer 101. The color display layer 101 includes a liquid crystal element, a color filter, and the like. A polarizing plate 105 is provided on the glass substrate 104, and a polarization control filter 102 is provided on the polarizing plate 105. The polarization control filter 102 is configured by a phase difference plate having a different optical axis direction for each of the right and

left polarization regions

102a and 102b. A backlight (not shown) is disposed below the glass substrate 103. The user sees the light exiting from the polarization control filter 102.

When the user is in front of the display device, the light of the left-eye image emitted from the left-eye pixel passes through the left-eye polarization region 102a of the polarization control filter 102 and reaches the user. Similarly, the right-eye image light emitted from the right-eye pixel passes through the right-eye polarization region 102 b of the polarization control filter 102 and reaches the user. At this time, it is assumed that the light passing through the left-eye polarizing region 102a is polarized in the vertical direction, and the light passing through the right-eye polarizing region 102b is polarized in the horizontal direction. The user visually recognizes images corresponding to the left and right eyes through the polarizing glasses.

On the other hand, when the user is not in front of the display device and is viewing the screen from an oblique position, the user sees the light emitted obliquely from the polarization control filter 102 of the display device as shown in FIG. Become. Here, the case where the screen of the display device is looked up from below or from above is considered. The left and right polarizing

regions

102a and 102b extend in the horizontal direction of the screen. Part of the light emitted from the left-eye pixel of the color display layer 101 reaches the user through the right-eye polarization region 102b at a position corresponding to the vicinity of the boundary between the left and

right polarization regions

102a and 102b. . Therefore, a phenomenon (crosstalk) occurs in the user's right eye that a part of the image for the left eye is mixed and visually recognized in addition to the image for the right eye.

In order to suppress the occurrence of this crosstalk, it is conceivable to provide a light absorption part at the boundary between the right and left polarization regions of the polarization control filter. However, when the light absorption part is provided in the polarization control filter, the luminance (aperture ratio) is lowered by the light absorption part, so that the performance as a display device for a two-dimensional image is particularly inferior to that of a normal display device.

Therefore, in order to suppress the occurrence of crosstalk, each color pixel of the color display layer 101 is composed of the first sub-pixel and the second sub-pixel, and the first sub-pixel is located at a position corresponding to the boundary of the left and right polarization regions. There is a method of arranging pixels (Patent Document 2). When displaying a three-dimensional image, the first subpixel located at the position corresponding to the boundary between the left and right polarization regions is displayed in black, and the image is displayed only with the second subpixel. As a result, the left and right images are well separated, and the occurrence of crosstalk can be suppressed.

Japanese Patent Publication “JP 2010-204389 A (published on September 16, 2010)”

However, in the configuration of Patent Document 1 in which a plurality of subpixels are provided, in order to be able to write different data to the first subpixel and the second subpixel, each of the first subpixel and the second subpixel is individually provided. It is necessary to provide a gate line. For this reason, there are problems that the aperture ratio is reduced and the writing time to pixels for one row is shortened as compared with a normal display device.

It should be noted that the pixel voltage of the first subpixel (the difference between the potential of the counter electrode and the potential of the pixel electrode) can be lowered by providing an auxiliary capacitor for voltage reduction in the first subpixel. FIG. 19 is an equivalent circuit diagram illustrating a configuration of a pixel in which an auxiliary capacitor for voltage reduction is provided in the first sub-pixel. One pixel includes a first sub-pixel Pa and a second sub-pixel Pb. The first subpixel Pa and the second subpixel Pb include a transistor Tr1 (Tr2), a liquid crystal capacitor Clc, and an auxiliary capacitor Cst. One end of the liquid crystal capacitor Clc is connected to the counter electrode COM. In addition, the first subpixel Pa includes a transistor Tr3 and a voltage drop capacitor Cd connected to the transistor Tr3. The scanning signal line Gi is driven to turn on the transistors Tr1 and Tr2, and the data potential is written into the liquid crystal capacitance Clc of the first subpixel Pa and the second subpixel Pb. After that, when the control signal line Csi is driven to make the transistor Tr3 conductive, charges are transferred to the voltage reduction capacitor Cd, and the pixel voltage of the liquid crystal capacitor Clc of the first subpixel Pa can be reduced. Thereby, the first sub-pixel Pa can be displayed dark and the second sub-pixel Pb can be displayed bright. If the first sub-pixels Pa are arranged at positions corresponding to the boundaries between the left and right polarization regions, the rows in which the first sub-pixels Pa are arranged as a black matrix, and the occurrence of crosstalk can be suppressed.

However, in the configuration shown in FIG. 19, three transistors are required for one pixel. Therefore, problems such as a decrease in yield and an increase in manufacturing cost occur.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a highly productive display capable of visually recognizing a clear three-dimensional image while suppressing crosstalk in the display of the three-dimensional image. To implement the device.

A display device according to one embodiment of the present invention includes a first pixel including a first bright subpixel and a first dark subpixel that are adjacent to each other in the column direction, and a second bright subpixel and a second darker that are adjacent to each other in the column direction. A display layer including a second pixel including a sub-pixel, and a polarization control layer disposed so as to overlap the display layer and controlling a polarization state of light emitted from the pixel, a two-dimensional image and a three-dimensional image A display device capable of displaying an image, wherein the first bright subpixel and the second dark subpixel are arranged side by side in a row direction, and the first dark subpixel and the second bright subpixel Are arranged side by side in the row direction, and the polarization control layer includes two types of polarization regions that make the polarization states of light different from each other. The first dark sub-pixel and the second bright sub-pixel are Placed at a position corresponding to the boundary of the kind of polarization region Ri, when displaying a three-dimensional image, in the first pixel is to display an image, in the above second pixel is characterized by comprising a display control unit for the black display.

A display device according to one embodiment of the present invention includes a display layer including a plurality of pixels, and a polarization control layer that is disposed so as to overlap the display layer and controls a polarization state of light emitted from the pixels. A display device capable of displaying a three-dimensional image and a three-dimensional image, wherein each pixel includes a first sub-pixel located on the upper side in the column direction and a second sub-pixel located on the lower side in the column direction, Among the plurality of pixels, in the first type pixel, the first sub pixel performs bright display, and the second sub pixel performs dark display, and in the second type pixel, the first sub pixel. Performs dark display, the second subpixel performs bright display, the polarization control layer includes two types of polarization regions that change the polarization state of light from each other, and the second subpixel includes the 2 subpixels. It is located at the position corresponding to the boundary of the different polarization regions When displaying a three-dimensional image, the first-type pixel is alternately displayed for each pixel row, and the first-type image and the second-eye image are displayed alternately, and the second-type pixel is displayed black. A control unit is provided.

A display device according to one embodiment of the present invention includes a display layer including a plurality of pixels, and a polarization control layer that is disposed so as to overlap the display layer and controls a polarization state of light emitted from the pixels. A display device capable of displaying a three-dimensional image and a three-dimensional image, wherein each pixel includes a bright sub-pixel and a dark sub-pixel, and the polarization control layer includes two types of polarization regions that make light polarization states different from each other When a three-dimensional image is displayed, among the plurality of pixels, a pixel in which the bright sub-pixel is arranged at a position corresponding to a boundary between the two types of polarization regions is displayed in black, and the 2 A display control unit for displaying an image is provided for the pixel in which the bright sub-pixel is arranged at a position not corresponding to the boundary between the types of polarization regions.

According to the above configuration, the bright sub-pixel of the pixel that performs black display and the dark sub-pixel of the pixel that displays the image are arranged at positions corresponding to the boundaries between the two types of polarization regions. Black stripes can be formed on the substrate. Thereby, the image for left eyes and the image for right eyes can be clearly separated and displayed. Therefore, crosstalk can be suppressed.

In the display device according to one embodiment of the present invention, when a three-dimensional image is displayed as described above, the bright sub-pixel is arranged at a position corresponding to the boundary between the two types of polarization regions among the plurality of pixels. The display control unit is configured to display black for the pixels that are displayed, and display an image for the pixels in which the bright sub-pixels are arranged at positions that do not correspond to the boundary between the two types of polarization regions. .

Therefore, a bright sub-pixel of a pixel that performs black display and a dark sub-pixel of a pixel that displays an image are arranged at a position corresponding to the boundary between the two types of polarization regions, and a black stripe is formed at the position. Can be formed. Thereby, the image for left eyes and the image for right eyes can be clearly separated and displayed. Therefore, crosstalk can be suppressed.

It is a block diagram which shows the structure of the liquid crystal display device which concerns on one Embodiment of this invention. It is a figure which shows the structure of a part of display panel with which the said liquid crystal display device is provided as an equivalent circuit. It is a timing chart which shows the example of a drive of the said liquid crystal display device in a certain flame | frame. 4 is a timing chart showing an example of driving the liquid crystal display device in the frame. It is a schematic diagram which shows the display state of each pixel in the said flame | frame. It is a timing chart which shows the drive example of the said liquid crystal display device in another flame | frame. 4 is a timing chart showing an example of driving the liquid crystal display device in the frame. It is a schematic diagram which shows the display state of each pixel in the said flame | frame. It is a schematic diagram which shows the display state of a pixel in the case of displaying a two-dimensional image. It is a schematic diagram which shows the display state of a pixel in the case of displaying a three-dimensional image. It is a schematic diagram which shows the display state of the polarization control filter of the said liquid crystal display device, and the three-dimensional image of a display panel. It is a block diagram which shows the structure of the liquid crystal display device which concerns on other embodiment of this invention. It is a schematic diagram which shows the display state of each pixel in a certain frame. It is a schematic diagram which shows the display state of a pixel in the case of displaying a two-dimensional image. It is a schematic diagram which shows the display state of a pixel in the case of displaying a three-dimensional image. It is a schematic diagram which shows the display state of the polarization control filter of the said liquid crystal display device, and the three-dimensional image of a display panel. It is a top view which shows roughly a part of arrangement | positioning of the polarization control filter and pixel of the conventional display apparatus. It is sectional drawing which shows the cross section of the vertical direction of the conventional display apparatus roughly. FIG. 5 is an equivalent circuit diagram illustrating a configuration of a pixel in which a sub-pixel is provided with an auxiliary capacitor for voltage reduction. It is a block diagram which shows the structure of the liquid crystal display device which concerns on further another embodiment of this invention. It is a timing chart which shows the example of a drive of the said liquid crystal display device in a certain flame | frame.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. For convenience of explanation, the extending direction of the scanning signal lines is hereinafter referred to as the row direction. However, it goes without saying that the scanning signal line may extend in the horizontal direction or in the vertical direction when the liquid crystal display device is used (viewed).

The following is an example of normally black. In this case, white display is performed when the liquid crystal is on (the applied voltage of the liquid crystal is large), and black display is performed when the liquid crystal is off (the applied voltage of the liquid crystal is small or 0). However, it goes without saying that the present invention can be applied even in the case of normally white.

[Embodiment 1]
(Overall configuration of liquid crystal display device)
FIG. 1 is a block diagram showing the configuration of the liquid crystal display device 1 of the present embodiment. The liquid crystal display device 1 is a polarization-type three-dimensional image display device that displays a left-eye image and a right-eye image with polarized light that is orthogonal to each other. The user can visually recognize a stereoscopic image using polarized glasses whose polarization directions of the left and right polarizing plates are different.

The liquid crystal display device 1 includes a data conversion unit (display control unit) 2, a display signal generation unit (display control unit) 3, a gate driver 4, a CS driver 5, a data driver 6, a display panel (display layer) 7, and a polarization control. A filter (polarization control layer) 8 is provided. Further, the liquid crystal display device 1 includes a gate line (scanning signal line) Gi, a CS line (retention capacitor line) Csi ′, and a source line (data signal line) Sj. Here, i is an integer of (1 ≦ i ≦ n), i ′ is an integer of (1 ≦ i ′ ≦ n + 1), and j is an integer of (1 ≦ j ≦ m).

The display panel 7 is configured by overlapping a pixel array in which a plurality of pixels are arranged, a color filter corresponding to the pixels, and a polarizing plate. In the display panel 7, pixels P are arranged in a matrix of n rows and m columns. Each pixel P includes two subpixels Pa · Pb adjacent to each other in the column direction. For the pixel Pij located in the i row and j column, the gate line Gi is arranged so as to pass between the two sub pixels Pa and Pb of the pixel, and the CS line Csi is located above the pixel (above the sub pixel Pa). Is arranged, and the CS line Csi + 1 is arranged below the pixel (under the sub-pixel Pb). The gate line Gi and the CS line Csi extend along the row direction. For the pixel Pij located in the i row and the j column, the source line Sj is arranged on the left side of the pixel. The source line Sj extends along the column direction.

The gate driver 4 is a drive circuit that drives the pixels P for n rows through the gate line Gi. The gate line Gi is connected to both sub-pixels Pa and Pb of each pixel P in the i-th row. The gate driver 4 supplies a scanning signal to each gate line Gi.

The CS driver 5 is a drive circuit that drives the pixels P for n rows via the CS line Csi ′. The upper subpixel Pa of each pixel P in the i-th row forms a storage capacitor with the adjacent CS line Csi, and the lower subpixel Pb in each pixel P in the i-th row is adjacent to the CS line Csi. A storage capacitor is formed with Csi + 1. The CS driver 5 supplies a storage capacitor wiring signal to each CS line Csi ′.

Note that the CS line Csi 'may be connected to the same CS trunk line (not shown) for each CS line to which the same storage capacitor line signal is supplied. The CS driver can supply the same storage capacitor line signal to a plurality of CS lines by supplying the storage capacitor line signal to the CS trunk line.

The data driver 6 is a drive circuit that writes data to the pixels P for m columns via the source line Sj. The source line Sj is connected to both sub-pixels Pa and Pb of each pixel P in the j-th column. The data driver 6 supplies a data signal having a potential according to display data to each source line Sj.

The display signal generator 3 is a control drive circuit for controlling the gate driver 4, the CS driver 5, and the data driver 6 to display an image. The display signal generator 3 generates timings such as a gate start pulse, a gate clock, a source start pulse, and a source clock used for the display operation. The display signal generator 3 outputs display data to the data driver 6. At the same time, the display signal generator 3 outputs a signal for driving / controlling the gate driver 4 to the gate driver 4 and a signal for driving / controlling the CS driver 5 to the CS driver 5. As a result, display data is written to each pixel P to display an image.

The data conversion unit 2 determines whether the video signal input from the outside indicates a two-dimensional image or a three-dimensional image. The data conversion unit 2 converts the data of the video signal of the three-dimensional image input from the outside, and generates display data used for display. The data converter 2 outputs display data to the display signal generator 3.

When displaying a three-dimensional image, the liquid crystal display device 1 alternately displays a left-eye image and a right-eye image for each pixel row. Therefore, the resolution in the column direction (vertical direction) of the image for the left eye and the image for the right eye in one frame is halved. When displaying a three-dimensional image, the liquid crystal display device 1 performs black display for each pixel column. Therefore, the resolution in the row direction (horizontal direction) of the image for the left eye and the image for the right eye in one frame is also halved. In the liquid crystal display device 1, one display region has three pixels of R (red), G (green), and B (blue) arranged in the row direction. One display area is an area in which multiple colors can be expressed by RGB.

For example, when the signals for the left eye image and the right eye image are alternately input, the data conversion unit 2 displays the left eye image and the right eye image alternately and simultaneously for each pixel row. The row data is thinned out in the vertical direction for the left-eye image and the right-eye image, and the left-eye image row data and the right-eye image row data are alternately arranged for each row. The data conversion unit 2 thins out data for each display area in the row direction (corresponding to three pixels of RGB), and data for three pixels in one display area and data for black display (gradation 0). Are alternately arranged for each pixel column. When the arrangement order of the pixels in the row direction is R, G, B, as shown in FIG. 10, R (image display), G (black display), B (image display), R in the row direction. (Black display), G (image display), B (black display)... Therefore, the order of B data and G data is switched with respect to the display of the two-dimensional image.

In addition, when displaying a two-dimensional image, the data conversion unit 2 does not perform the above-described thinning process.

The polarization control filter 8 includes a phase plate and has two types of polarization regions corresponding to the left and right eyes. The left-eye polarizing region and the right-eye polarizing region extend in the row direction and are alternately arranged in the column direction. The phase plate is a half-wave plate, and the left-eye polarization region has a half-wavelength such that the optical axis of the half-wave plate coincides with the polarization direction of the light that has passed through the polarizing plate of the display panel 7. A board is placed. In the right-eye polarization region, a half-wave plate is disposed so that the polarization direction of the light that has passed through the polarizing plate of the display panel 7 and the optical axis of the half-wave plate are at an angle of 45 °. ing. That is, light polarized in the vertical direction is emitted from the polarization region for the left eye, and light polarized in the horizontal direction is emitted from the polarization region for the right eye. The left and right polarization directions are not limited to this.

(Configuration of display panel)
FIG. 2 is a diagram illustrating a partial configuration of the display panel 7 included in the liquid crystal display device 1 as an equivalent circuit. The pixel Pij in the i-th row and j-th column includes two sub-pixels Pa and Pb. The two subpixels Pa and Pb are arranged adjacent to each other in the column direction. Each sub-pixel Pa · Pb includes a transistor Tr and a pixel electrode PE. That is, one pixel Pij includes two transistors Tr.

As described above, the gate line Gi is arranged between the two sub-pixels Pa and Pb of the pixel Pij. Further, a CS line Csi is disposed above the sub pixel Pa on the upstream side (upper side) in the scanning direction, and a CS line Csi + 1 is disposed below the sub pixel Pb on the downstream side (lower side) in the scanning direction. A source line Sj is arranged on the left side of the sub-pixels Pa and Pb.

The pixel electrode PE sandwiches a liquid crystal layer with a counter electrode (not shown) to form a liquid crystal capacitor. Further, the pixel electrode PE of the upper sub-pixel Pa of the pixel Pij forms a storage capacitor Ccs with the CS line Csi adjacent (adjacent) to the upper side. Similarly, the pixel electrode PE of the lower sub-pixel Pb forms a storage capacitor Ccs with the CS line Csi + 1 adjacent to (being close to) the lower side. In this way, the two sub-pixels Pa · Pb of one pixel Pij form a storage capacitor Ccs between different CS lines. Each sub-pixel Pa · Pb is a liquid crystal display element.

The gate electrode of the transistor Tr of each subpixel Pa · Pb of the pixel Pij is connected to a gate line Gi passing between the two subpixels Pa · Pb. The pixel electrodes PE of the sub-pixels Pa and Pb of the pixel Pij are connected to the source line Sj via the transistor Tr.

Here, the transistors Tr of the sub-pixels Pa and Pb are turned on (conductive) when the gate potential is high (High), and are turned off when the gate potential is low (Low) ( This is an N-channel transistor that is in a non-conductive state. However, the present invention is not limited to this, and a P-channel transistor in which the gate potential and the ON / OFF state are reversed can also be used.

(Drive of liquid crystal display device)
Next, a driving example of the liquid crystal display device 1 will be described. The liquid crystal display device 1 performs dot inversion driving. The liquid crystal display device 1 writes display data to each pixel so that pixels in which positive data is written in the row direction and column direction and pixels in which negative data is written are alternately arranged. Further, the liquid crystal display device 1 inverts the polarity of data written to each pixel for each frame (one frame or several frames).

3 and 4 are timing charts showing an example of driving the liquid crystal display device 1 in a certain frame (first frame). FIG. 3 shows the potential (data potential) VSj of the data signal supplied to the source line Sj and the potential (gate potential) VGi of the gate pulse supplied to the gate lines Gi to Gi + 3 with respect to time (horizontal axis). VGi + 3, the potential (CS potential) VCsi to VCsi + 3 of the storage capacitor wiring signal supplied to the CS lines Csi to Csi + 3, and the pixels Pi, j to Pi + 2, j of the i-th row, j-th column to i + 2-th row, j-th column. The potentials (pixel potentials) Vpai, j to Vpai + 2, j and Vpbi, j to Vpbi + 2, j of the pixel electrode PE of each of the subpixels Pa and Pb are shown. In FIG. 4, the potentials (pixel potentials) Vpai, j + 1 to Vpai + 2, j + 1 of the pixel electrodes PE of the subpixels Pa and Pb of the pixels Pi, j + 1 to Pi + 2, j + 1 in the i-th row, j + 1-th column to the (i + 2) -th row, j + 1-th column. , Vpbi, j + 1 to Vpbi + 2, j + 1 are shown. 3 and 4, the pixel potentials (Vpai, j to Vpai + 2, j, Vpbi, j to Vpbi + 2, j, Vpai, j + 1 to Vpai + 2, j + 1, Vpbi, j + 1 to Vpbi + 2, j + 1) of each pixel electrode are as follows. In this frame, only the potential after the gate is turned on and data is written is shown. For the sake of simplicity, the influence of pixel potential pull-in due to gate parasitic capacitance is ignored here. FIG. 3 and FIG. 4 show an example in which data of the same gradation is written to each pixel when displaying a two-dimensional image. The horizontal broken line shown in FIGS. 3 and 4 indicates the potential of the counter electrode.

FIG. 5 is a schematic diagram showing a display state of each pixel in the first frame. In FIG. 5, the polarity of data written to each pixel electrode PE is indicated by + and −. In FIG. 5, the pixel electrode PE of the bright sub-pixel that performs bright display is shown in white, and the pixel electrode PE of the dark sub-pixel that performs dark display is indicated by dotted hatching.

Data polarity is inverted every horizontal scanning period (1H). That is, a data potential having a reverse polarity is written to the pixels in the same column for each pixel row. The data potentials of two source lines adjacent to each other have opposite polarities. That is, a data potential having a different polarity for each pixel column is written to pixels in the same row.

The gate potential sequentially becomes H (High) level in order to turn on the transistor Tr of each pixel (conductive state).

The CS potential is inverted with respect to the reference potential every two horizontal scanning periods (2H). Note that the polarity of the potential VCsi of the CS line Csi and the potential VCsi + 1 of the lower CS line Csi + 1 are opposite to each other. The phase of the waveform of the potential VCsi + 1 of the CS line Csi + 1 and the potential VCsi + 2 of the CS line Csi + 2 below the CS line Csi + 1 are shifted by one horizontal scanning period. The polarity of the potential VCsi + 2 of the CS line Csi + 2 and the potential VCsi + 3 of the lower CS line Csi + 3 are opposite to each other. Although not shown, the potential VCsi + 4 of the CS line Csi + 4 is the same as the potential VCsi + 1 of the CS line Csi + 1.

For the two sub-pixels Pa and Pb of one pixel, the transistor Tr becomes conductive at the same time when the gate is turned on, so that the same data potential is written into the two sub-pixels Pa and Pb.

After data is written in the pixel (sub-pixel), the pixel potential of the pixel electrode PE connected to the CS line via the storage capacitor Ccs also changes due to the change of the CS potential (polarity inversion). When attention is paid to one pixel Pij, immediately after data is written to the sub-pixels Pa · Pb, the pixel potential Vpa, j and the pixel potential Vpbi, j of the two sub-pixels Pa · Pb are the same. Here, the sub-pixels Pa and Pb are connected to different CS lines Csi and Csi + 1, respectively. After the transistor Tr is turned off (the gate potential is L (Low)), the CS potential VCsi of the CS line Csi rises, so that the pixel potential Vpai, j of the subpixel Pa in which the positive data is written rises. . On the other hand, after the transistor Tr is turned off, the CS potential VCsi + 1 of the CS line Csi + 1 is lowered, so that the pixel potential Vpbi, j of the sub-pixel Pb in which the positive data is written is lowered.

Thereby, the effective pixel voltage of the sub-pixel Pa (average of the pixel voltages in one frame period) is increased, that is, the sub-pixel Pa of the pixel Pi, j is a bright sub-pixel that is displayed brightly. On the other hand, the effective pixel voltage of the sub-pixel Pb is small, that is, the sub-pixel Pb of the pixel Pi, j is a dark sub-pixel that is displayed dark. Here, the pixel voltage is a difference between the potential of the counter electrode and the potential of the pixel electrode.

Regarding the sub-pixels Pa and Pb of the pixels Pi and j + 1 in the adjacent pixel column, the polarity of the data potential to be written is opposite (negative polarity) (see FIG. 4). Therefore, the subpixel Pa of the pixel Pi, j + 1 is a dark subpixel that is displayed dark, and the subpixel Pb of the pixel Pi, j + 1 is a bright subpixel that is displayed brightly.

Therefore, in the first frame, a bright sub-pixel and a dark sub-pixel are arranged as shown in FIG.

FIGS. 6 and 7 are timing charts corresponding to FIGS. 3 and 4 and showing a driving example of the liquid crystal display device 1 in the second frame subsequent to the first frame. FIG. 6 shows the potential (data potential) VSj of the data signal supplied to the source line Sj and the potential (gate potential) VGi of the gate pulse supplied to the gate lines Gi to Gi + 3 with respect to time (horizontal axis). VGi + 3, the potential (CS potential) VCsi to VCsi + 3 of the storage capacitor wiring signal supplied to the CS lines Csi to Csi + 3, and the pixels Pi, j to Pi + 2, j of the i-th row, j-th column to i + 2-th row, j-th column. The potentials (pixel potentials) Vpai, j to Vpai + 2, j and Vpbi, j to Vpbi + 2, j of the pixel electrode PE of each of the subpixels Pa and Pb are shown. FIG. 7 shows the potentials (pixel potentials) Vpai, j + 1 to Vpai + 2, j + 1 of the pixel electrodes PE of the sub-pixels Pa and Pb of the pixels Pi, j + 1 to Pi + 2 and j + 1 in the i-th row, j + 1-th column to i + 2-th row, j + 1-th column. , Vpbi, j + 1 to Vpbi + 2, j + 1 are shown. 6 and 7, the pixel potentials (Vpai, j to Vpai + 2, j, Vpbi, j to Vpbi + 2, j, Vpai, j + 1 to Vpai + 2, j + 1, Vpbi, j + 1 to Vpbi + 2, j + 1) of each pixel electrode are shown in FIG. In this frame, only the potential after the gate is turned on and data is written is shown.

FIG. 8 is a schematic diagram corresponding to FIG. 5 and showing a display state of each pixel in the second frame. In FIG. 8, the polarity of data written to each pixel electrode PE is indicated by + and −. In FIG. 8, the pixel electrode PE of a bright subpixel that performs bright display is shown in white, and the pixel electrode PE of a dark subpixel that performs dark display is indicated by dotted hatching.

In the second frame, the data potential written to each pixel has a reverse polarity compared to the first frame. Further, the CS potential is also inverted (in reverse phase) with respect to the timing when the transistor Tr of each pixel is turned on. Therefore, in the second frame, the polarity of the data potential written to each pixel is reversed with respect to the previous frame, but as a result, the positions of the bright subpixel and the dark subpixel do not change. Thereby, the liquid crystal display device 1 can perform dot inversion driving.

In addition, also when displaying a three-dimensional image, the liquid crystal display device 1 performs the drive similar to the above. However, when displaying a three-dimensional image, black display data is supplied to the source line for each column.

(Display of 2D and 3D images)
FIG. 9 is a schematic diagram illustrating a display state of pixels when a two-dimensional image is displayed. In the liquid crystal display device 1, each display area AR includes three pixels P of R, G, and B arranged in the row direction. Here, pixels are arranged in the order of R, G, and B from the left in each display area AR. Each pixel P includes a sub-pixel Pa arranged on the upper side and a sub-pixel Pb arranged on the lower side. As described above, one of the sub pixel Pa and the sub pixel Pb is a bright sub pixel, and the other is a dark sub pixel. The bright sub-pixels and the dark sub-pixels are alternately arranged in a checkered pattern in the row direction and the column direction.

The liquid crystal display device 1 displays an image on all bright sub-pixels and dark sub-pixels when displaying a two-dimensional image.

In this way, the viewing angle dependency of the γ characteristic can be improved by displaying one pixel divided into a bright sub-pixel and a dark sub-pixel. Since the bright subpixel and the dark subpixel have different pixel voltages, the alignment state of the liquid crystal is different. By mixing sub-pixels having different liquid crystal alignment states, the γ characteristic when viewed from an oblique direction can be made closer to the γ characteristic when viewed from the front. Therefore, a liquid crystal display device with a wide viewing angle can be realized.

Here, when displaying a three-dimensional image, it is necessary to perform display separately for a line for displaying an image for the left eye and a line for displaying an image for the right eye. The left-eye polarization region and the right-eye polarization region of the polarization control filter 8 may be arranged for each corresponding pixel column, and the left-eye image and the right-eye image may be separated for each pixel column. However, when the user looks at the display screen, the user often sees the image from the left and right diagonal directions rather than from the upper and lower diagonal directions. Therefore, in order to suppress crosstalk, the left eye image and the right eye image as in the present embodiment. Is preferably displayed alternately for each row.

In the configuration of Patent Document 1, for example, a left-eye image or a right-eye image is displayed on the upper sub-pixel Pa, and only the lower sub-pixel Pb is displayed in black. A stripe is formed and the left and right images are separated.

In the liquid crystal display device 1 of this embodiment that performs dot inversion driving by driving the CS potential, the number of transistors Tr per pixel can be made two, so that the yield can be increased and the manufacturing cost is also low. Become. Further, by performing dot inversion driving, burn-in can be prevented and display with less flicker can be performed.

Further, when the liquid crystal is a vertical alignment type liquid crystal, there is an additional advantage of dot inversion driving. A steep gradient electric field is formed between each pixel by arranging (at least partially) a pixel in which positive data is written and a pixel in which negative data is written in a checkered pattern. This gradient electric field stabilizes the axially symmetric alignment domain (domain corresponding to one pixel) of the vertically aligned liquid crystal. As a result, the axially symmetric alignment domain can be stabilized even in the display state of intermediate gradation, and the display quality can be improved.

However, since the liquid crystal display device 1 writes the same data to the sub-pixels Pa and Pb of one pixel, for example, image data is written only to one sub-pixel Pa and black display data is written only to the other sub-pixel Pb. Cannot write.

Therefore, when displaying a three-dimensional image, the liquid crystal display device 1 writes black display data to the pixel P (sub-pixel Pa · Pb) of the pixel column in which the lower sub-pixel Pb is a bright sub-pixel.

FIG. 10 is a schematic diagram showing a display state of pixels when a three-dimensional image is displayed. The image for the left eye and the image for the right eye are displayed using the first type pixel P in which the upper sub pixel Pa is a bright sub pixel for each pixel column. The lower sub-pixel Pb that performs image display is a dark sub-pixel. On the other hand, the second type pixel in which the lower sub-pixel Pb is a bright sub-pixel displays black. Therefore, substantially all the sub-pixels Pb are darkly displayed, and black stripes are formed in the row region where the sub-pixels Pb are arranged.

In the row direction, there are a display area AR in which G pixels are displayed in black and R and B pixels display an image, and a display area AR in which R and B pixels are displayed in black and G pixels are displayed. Line up alternately. Therefore, an arbitrary color (full color) is expressed by two display areas AR adjacent in the row direction.

FIG. 11 is a schematic diagram showing a display state of a three-dimensional image of the polarization control filter 8 and the display panel 7 of the liquid crystal display device of the present embodiment. In FIG. 11, the polarization control filter 8 and the display panel 7 are shown in order to show the correspondence relationship between the polarization control filter 8 viewed from the normal direction of the display screen and the pixel arrangement of the display panel 7 overlapping the polarization control filter 8. Shown side by side. In FIG. 11, the polarization direction of light emitted from the left-eye polarizing region 8a and the right-eye polarizing region 8b to the user is indicated by an arrow.

The left and right

polarizing regions

8a and 8b of the polarization control filter 8 respectively extend in the horizontal direction (row direction) of the screen and are alternately arranged in the vertical direction (column direction). For example, the sub pixel Pa of the first pixel from the top of the display panel 7 shown in FIG. 11 displays an image for the left eye and is disposed at a position overlapping the polarization region 8 a for the left eye of the polarization control filter 8. The sub-pixel Pa of the second pixel from the top of the display panel 7 shown in FIG. 11 displays the right-eye image and is arranged at a position overlapping the right-eye polarization region 8 b of the polarization control filter 8. The sub-pixel Pb of the display panel 7 forms a black stripe and is arranged at a position corresponding to the boundary between the left and

right polarization regions

8a and 8b of the polarization control filter 8 (overlapping near the boundary).

The liquid crystal display device 1 displays a two-dimensional image using all pixels when displaying a two-dimensional image. When the user views the two-dimensional image displayed by the liquid crystal display device 1, polarized glasses are not used, and therefore the polarization direction of light of each pixel is not related to the visual recognition of the two-dimensional image. Since the liquid crystal display device 1 expresses a two-dimensional image using all the pixels and does not require a light-absorbing part for separating left and right, the image can be displayed brightly.

On the other hand, when displaying a three-dimensional image, the liquid crystal display device 1 displays black (dark display) for each pixel column, and displays the three-dimensional image using half the pixel columns in the row direction. Thereby, black stripes extending in the row direction can be formed, and the left-eye image and the right-eye image can be clearly separated and displayed. Therefore, crosstalk can be suppressed.

(Modification)
In addition, when displaying a three-dimensional image, the data conversion unit 2 can also convert the gradation of the entire data to a lower gradation so that the dark sub-pixel is darker (black display). Below a predetermined gradation, the dark sub-pixels are displayed almost black by CS driving. Thereby, the bright sub-pixel can display an image, and the dark sub-pixel can be displayed almost black. Therefore, the black stripe becomes blacker, and the left-eye image and the right-eye image can be clearly separated.

In the above, in order to convert the input video signal data of the three-dimensional image into data for display, the data is thinned out for each display area in the row direction, and the data for one display area and the data for black display are displayed. However, the present invention is not limited to this. Instead of thinning out, the data conversion unit 2 may average the data of two horizontally adjacent display areas for each color and use them for display.

Further, the data thinned out for each pixel column may be used as an image of the next frame and displayed at a double frame rate by double speed driving. In this case, an image having the resolution of the original input video signal can be displayed in a pseudo manner. Note that row data thinned out in order to display the left-eye image and the right-eye image as one frame image may be displayed as another frame image and displayed at a double frame rate.

[Embodiment 2]
Another embodiment of the present invention will be described. For convenience of explanation, members and configurations having the same functions as those in the drawings described in the first embodiment are given the same reference numerals, and detailed descriptions thereof are omitted. In the present embodiment, the liquid crystal display device has RGBY pixels.

(Overall configuration of liquid crystal display device)
FIG. 12 is a block diagram showing a configuration of the liquid crystal display device 10 of the present embodiment. The liquid crystal display device 10 is a polarization-type three-dimensional image display device that displays a left-eye image and a right-eye image with polarized light that is orthogonal to each other.

The liquid crystal display device 10 includes a gradation conversion unit 11, a data conversion unit (display control unit) 12, a display signal generation unit (display control unit) 3, a gate driver 4, a CS driver 5, a data driver 6, a display panel (display layer). ) 14 and a polarization control filter (polarization control layer) 8. The display panel 14 has four color pixels of R (red), G (green), B (blue), and Y (yellow) in order to display an image.

The gradation converting unit 11 displays the image indicated by the input video signal (RGB) using the RGBY four-color pixels, and converts the three-color (RGB) video signal into the four-color (RGBY) video signal. (The gradation of each pixel of four colors is determined). In the case of displaying using four colors of RGBY and the case of displaying using three colors of RGB, even if the same color specified by the same video signal is expressed, the luminance of each pixel of RGB is naturally Different. The gradation converter 11 outputs the converted video signal to the data converter 12.

The data converter 12 determines whether the input video signal indicates a two-dimensional image or a three-dimensional image. The data converter 12 converts the data of the input video signal of the three-dimensional image, and generates display data used for display. The data converter 12 outputs display data to the display signal generator 3.

When displaying a three-dimensional image, the liquid crystal display device 10 alternately displays a left-eye image and a right-eye image for each pixel row. Therefore, the resolution in the column direction (vertical direction) of the image for the left eye and the image for the right eye in one frame is halved. Moreover, when displaying a three-dimensional image, the liquid crystal display device 10 displays the pixels of the half pixel row as a whole in black. Therefore, the resolution in the row direction (horizontal direction) of the image for the left eye and the image for the right eye in one frame is also halved.

In this embodiment, the arrangement of the bright sub-pixels and the dark sub-pixels of each pixel is arranged as shown in FIG. In the liquid crystal display device 10, one display area AR has four pixels of R (red), G (green), B (blue), and Y (yellow) arranged in the row direction. One display area AR is an area in which multiple colors can be expressed by RGBY. In a certain display area AR, the upper subpixel Pa of R, B, and Y is a bright subpixel, and the lower subpixel Pb of G is a bright subpixel. In the display area AR adjacent to the row direction, the sub-pixel Pa on the upper side of G is a bright sub-pixel, and the sub-pixel Pb on the lower side of R, B, and Y is a bright sub-pixel. The bright pixels of the B pixel and the Y pixel are arranged side by side.

For example, when the signals for the left-eye image and the right-eye image are alternately input, the data conversion unit 12 displays the left-eye image and the right-eye image alternately and simultaneously for each pixel row. The row data is thinned out in the vertical direction for the left-eye image and the right-eye image, and the left-eye image row data and the right-eye image row data are alternately arranged for each row. Further, the data conversion unit 12 thins out data for each display area in the row direction (corresponding to four pixels of RGBY), data of four pixels in one display area, and data of black display for four pixels, Are arranged in a predetermined order. When the arrangement order of the pixels in the row direction is R, G, B, and Y, as shown in FIG. 15, R (image display), G (black display), and B (image display) in the row direction. Y (image display), R (black display), G (image display), B (black display), Y (black display)... Therefore, the order of the G data and the B · Y data is switched with respect to the display of the two-dimensional image.

(Drive of liquid crystal display device)
FIG. 13 is a schematic diagram showing a display state of each pixel in a certain frame. In FIG. 13, the polarity of data written to each pixel electrode PE is indicated by + and −. In FIG. 13, the pixel electrode PE of a bright sub-pixel that performs bright display is shown in white, and the pixel electrode PE of a dark sub-pixel that performs dark display is indicated by dotted hatching. FIG. 13 shows an example of the correspondence between each pixel and RGBY.

This embodiment differs from the first embodiment in that the B pixel and the Y pixel have the same polarity in the same pixel row so that the B bright subpixel and the Y bright subpixel are arranged in the same row. Write data. Thereby, the arrangement of the bright subpixel and the dark subpixel is the same between the B pixel and the Y pixel.

(Display of 2D and 3D images)
FIG. 14 is a schematic diagram illustrating a display state of pixels when a two-dimensional image is displayed. In the liquid crystal display device 10, each display area AR includes four pixels P of R, G, B, and Y arranged in the row direction. Here, in each display area AR, pixels are arranged in the order of R, G, B, and Y from the left. Each pixel P includes a sub-pixel Pa arranged on the upper side and a sub-pixel Pb arranged on the lower side. As described above, one of the sub pixel Pa and the sub pixel Pb is a bright sub pixel, and the other is a dark sub pixel.

The liquid crystal display device 10 displays an image on all bright sub-pixels and dark sub-pixels when displaying a two-dimensional image.

On the other hand, when displaying a three-dimensional image, the liquid crystal display device 10 writes black display data to the pixel P (sub-pixel Pa · Pb) of the pixel column in which the lower sub-pixel Pb is a bright sub-pixel.

FIG. 15 is a schematic diagram showing a display state of pixels when a three-dimensional image is displayed. The left-eye image and the right-eye image are displayed using the pixel P in which the upper sub-pixel Pa is a bright sub-pixel. The lower sub-pixel Pb that performs image display is a dark sub-pixel. On the other hand, a pixel whose lower sub-pixel Pb is a bright sub-pixel is displayed in black. Therefore, substantially all the sub-pixels Pb are darkly displayed, and black stripes are formed in the row region where the sub-pixels Pb are arranged.

In the row direction, a display area AR in which G pixels are displayed in black and R, B, and Y pixels display images, and a display in which R, B, and Y pixels are displayed in black and G pixels are displayed. The areas AR are alternately arranged. Therefore, an arbitrary color (full color) is expressed by two display areas AR adjacent in the row direction.

FIG. 16 is a schematic diagram showing a display state of a three-dimensional image of the polarization control filter 8 and the display panel 14 of the liquid crystal display device of the present embodiment. In FIG. 16, the polarization control filter 8 and the display panel 14 are shown in order to show the correspondence relationship between the polarization control filter 8 viewed from the normal direction of the display screen and the pixel arrangement of the display panel 14 overlapping the polarization control filter 8. Shown side by side.

For example, the sub-pixel Pa of the first pixel from the top of the display panel 14 shown in FIG. 16 displays the left-eye image and is arranged at a position overlapping the left-eye polarization region 8 a of the polarization control filter 8. The sub-pixel Pa of the second pixel from the top of the display panel 14 shown in FIG. 16 displays the image for the right eye and is arranged at a position overlapping the polarization region 8 b for the right eye of the polarization control filter 8. The sub-pixel Pb of the display panel 14 forms a black stripe and is disposed at a position corresponding to the boundary between the left and

right polarization regions

8a and 8b of the polarization control filter 8 (overlapping near the boundary).

The liquid crystal display device 10 displays a two-dimensional image using all pixels when displaying a two-dimensional image. Since the liquid crystal display device 1 expresses a two-dimensional image using all the pixels and does not require a light-absorbing part for separating left and right, the image can be displayed brightly.

On the other hand, when displaying a three-dimensional image, the liquid crystal display device 10 displays a predetermined pixel column in black (dark display) and displays a three-dimensional image using half the pixel column in the row direction. Thereby, black stripes extending in the row direction can be formed, and the left-eye image and the right-eye image can be clearly separated and displayed. Therefore, crosstalk can be suppressed.

[Embodiment 3]
Still another embodiment of the present invention will be described. For convenience of explanation, members and configurations having the same functions as those in the drawings described in the first embodiment are given the same reference numerals, and detailed descriptions thereof are omitted. In the present embodiment, when displaying a three-dimensional image, the amplitude of the CS potential is made larger than when displaying a two-dimensional image.

(Overall configuration of liquid crystal display device)
FIG. 20 is a block diagram showing the configuration of the liquid crystal display device 15 of the present embodiment. The liquid crystal display device 15 is a polarization-type three-dimensional image display device that displays a left-eye image and a right-eye image with polarized light that is orthogonal to each other.

The liquid crystal display device 15 includes a data conversion unit (display control unit) 16, a display signal generation unit (display control unit) 3, a gate driver 4, a CS driver 17, a data driver 6, a display panel (display layer) 7, and a polarization control. A filter (polarization control layer) 8 is provided. The display panel 7 is a display panel having pixels of three colors of RGB, similar to the first embodiment shown in FIGS. 2 and 9.

The data converter 16 determines whether the video signal input from the outside indicates a two-dimensional image or a three-dimensional image. The data conversion unit 16 converts data of a video signal of a three-dimensional image input from the outside, and generates display data used for display. The data converter 16 outputs display data to the display signal generator 3. Further, the data converter 16 outputs a signal indicating whether to display a two-dimensional image or a three-dimensional image to the CS driver 17 in order to switch the amplitude of the storage capacitor wiring signal supplied by the CS driver 17.

When displaying a three-dimensional image, as in the first embodiment, the data conversion unit 16 performs data thinning and rearrangement, and inserts black display data so that black display is performed for each pixel row. When a three-dimensional image is displayed, left and right images are displayed as shown in FIG.

Also, the data conversion unit 16 converts the gradation of the data so that the gradation of the pixel of the pixel for displaying the image becomes lower (darker) as a whole. If the gradation of one pixel is represented by 0 to 255 in the input video signal, it is converted into a gradation of 0 to 128, for example.

The CS driver 17 is a drive circuit that drives the pixels P for n rows via the CS line Csi ′. The CS driver 17 supplies a storage capacitor wiring signal to each CS line Csi '. Here, the CS driver 17 determines whether to display a two-dimensional image or a three-dimensional image based on the signal input from the data conversion unit 16. When displaying a three-dimensional image, the CS driver 17 increases the amplitude of the storage capacitor wiring signal supplied to each CS line Csi ′ (the amplitude of the change in the CS potential) compared to displaying a two-dimensional image.

(Drive of liquid crystal display device)
Next, an example of driving the liquid crystal display device 15 will be described. The liquid crystal display device 15 performs the same drive as in the first embodiment except that the amplitude of the storage capacitor wiring signal is increased when displaying a three-dimensional image.

FIG. 21 is a diagram corresponding to FIG. 3 and a timing chart showing an example of driving the liquid crystal display device 15 in a certain frame at the time of displaying a three-dimensional image. FIG. 21 shows the potential (data potential) VSj of the data signal supplied to the source line Sj and the potential (gate potential) VGi of the gate pulse supplied to the gate lines Gi to Gi + 3 with respect to time (horizontal axis). VGi + 3, the potential (CS potential) VCsi to VCsi + 3 of the storage capacitor wiring signal supplied to the CS lines Csi to Csi + 3, and the pixels Pi, j to Pi + 2, j of the i-th row, j-th column to i + 2-th row, j-th column. The potentials (pixel potentials) Vpai, j to Vpai + 2, j and Vpbi, j to Vpbi + 2, j of the pixel electrode PE of each of the subpixels Pa and Pb are shown. In FIG. 21, for reference, the CS potential VCsi at the time of displaying a two-dimensional image is indicated by a dotted line. Here, the pixels Pi, j to Pi + 2, j in the i-th row and j-th column to the (i + 2) -th row and the j-th column correspond to the pixels for displaying the left-eye image or the right-eye image when the three-dimensional image is displayed. ing. FIG. 21 shows an example in which data of the same gradation is written to these pixels.

The signal of the data potential VSj corresponding to the gradation converted darker by the data converter 16 with respect to the gradation indicated by the video signal input to the liquid crystal display device 15 is supplied to the source line Sj. Further, the width of the change in the CS potential of each CS line is larger than that shown in FIG. 3 (when a two-dimensional image is displayed).

Therefore, the change in the pixel potentials Vpai, j, Vpbi, j accompanying the change in the CS potential after data is written in the pixel (subpixel) also becomes large. Therefore, the difference between the effective values (effective pixel voltages) of the pixel potential Vpai, j and the pixel potential Vpbi, j of the two subpixels Pa and Pb of one pixel Pij becomes larger. Therefore, for the pixel Pij, the sub-pixel Pa that is a bright sub-pixel becomes brighter, and the sub-pixel Pb that is a dark sub-pixel becomes darker. The same applies to other pixels in the same pixel row. Therefore, the luminance difference between the bright sub-pixel and the dark sub-pixel can be increased.

In a liquid crystal display device that creates bright subpixels and dark subpixels by CS driving, generally, when the gradation of data written to a pixel is lower than a predetermined gradation, the dark subpixel is substantially equivalent to black display. It becomes brightness.

In the liquid crystal display device 15 of the present embodiment, the dark sub-pixel Pb can be displayed darker in the pixel column that performs the image display shown in FIG. 10, so that no image is displayed on the black stripe portion. Can do. Therefore, it is possible to more clearly separate the left eye image and the right eye image and suppress the occurrence of crosstalk.

Also, the bright sub-pixel becomes brighter by increasing the amplitude of the CS potential. On the other hand, by converting the gradation of the data of the input video signal to dark beforehand, it is possible to prevent the bright sub-pixel that performs image display from becoming too bright. Therefore, it is possible to appropriately display the intermediate gradation.

[Other variations]
A display device according to one embodiment of the present invention includes a first pixel including a first bright subpixel and a first dark subpixel that are adjacent to each other in the column direction, and a second bright subpixel and a second darker that are adjacent to each other in the column direction. A display layer including a second pixel including a sub-pixel, and a polarization control layer that is disposed so as to overlap the display layer and controls a polarization state of light emitted from the pixel. A display device capable of displaying an image, wherein the first bright subpixel and the second dark subpixel are arranged side by side in a row direction, and the first dark subpixel and the second bright subpixel Are arranged side by side in the row direction, and the polarization control layer includes two types of polarization regions that make the polarization states of light different from each other, and the first dark sub-pixel and the second bright sub-pixel include the 2 Placed at the position corresponding to the boundary of the polarization region of the type. , When displaying a three-dimensional image, the the first pixel to display the image, in the above second pixel comprising a display control unit for the black display.

A display device according to one embodiment of the present invention includes a display layer including a plurality of pixels, and a polarization control layer that is disposed so as to overlap the display layer and controls a polarization state of light emitted from the pixels. A display device capable of displaying a three-dimensional image and a three-dimensional image, wherein each pixel includes a bright sub-pixel and a dark sub-pixel, and the polarization control layer includes two types of polarization regions that make light polarization states different from each other When a three-dimensional image is displayed, among the plurality of pixels, a pixel in which the bright sub-pixel is arranged at a position corresponding to a boundary between the two types of polarization regions is displayed in black, and the 2 A display control unit that displays an image is provided for the pixels in which the bright sub-pixels are arranged at positions that do not correspond to the boundaries between the types of polarization regions.

The display layer includes third bright subpixels and third dark subpixels adjacent to each other in the column direction, and third pixels adjacent to the first pixel in the column direction and adjacent to each other in the column direction. A fourth pixel including four bright subpixels and a fourth dark subpixel and adjacent to the second pixel in the column direction, wherein the first dark subpixel and the third bright subpixel are arranged in the column direction. The second bright subpixel and the fourth dark subpixel are arranged adjacent to each other in the column direction, and the third bright subpixel and the fourth dark subpixel are arranged in the row direction. The third dark sub-pixel and the fourth bright sub-pixel are arranged side by side in the row direction, and when the display control unit displays a three-dimensional image, the first pixel An image for one eye is displayed, and an image for the second eye is displayed on the third pixel. The second pixel and the fourth pixel may be configured for the black display.

The display layer includes a first storage capacitor line and a second storage capacitor line, and the first bright sub-pixel and the second dark sub-pixel form a storage capacitor with the first storage capacitor line. The first dark sub-pixel and the second bright sub-pixel form a storage capacitor with the second storage capacitor line, and the display control unit includes the first storage capacitor line and the second storage capacitor line. A configuration may be employed in which the first dark sub-pixel and the second dark sub-pixel are darkly displayed by driving the capacitor wiring.

In addition, when the display control unit displays a three-dimensional image, the amplitude of the storage capacitor line signal supplied to the first storage capacitor line and the second storage capacitor line is set to be larger than that when a two-dimensional image is displayed. The structure which enlarges may be sufficient.

The display layer includes a first scanning signal line, a first data signal line, and a second data signal line, and the first bright sub-pixel and the first dark sub-pixel include the first scanning signal line and the first scanning signal line. The second bright subpixel and the second dark subpixel are connected to the first data signal line, the second dark subpixel is connected to the first scanning signal line and the second data signal line, and the display control unit is connected to the first data signal line. The display of the first pixel and the second pixel may be controlled by driving one scanning signal line, the first data signal line, and the second data signal line.

The display control unit may be configured to display an image on the first pixel and the second pixel when displaying a two-dimensional image.

The first bright subpixel, the second dark subpixel, the first dark subpixel, and the second bright subpixel may be a liquid crystal display element including a liquid crystal capacitor.

Further, the liquid crystal display element may include a vertical alignment type liquid crystal.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

The present invention can be used for a liquid crystal display device capable of displaying a two-dimensional image and a three-dimensional image.

1, 10, 15 Liquid

crystal display device

2, 12, 16 Data conversion unit (display control unit)
3 Display signal generator (display controller)
4

Gate driver

5, 17 CS driver 6

Data driver

7, 14 Display panel (display layer)
8 Polarization control filter (polarization control layer)
8a Polarizing region for left eye 8b Polarizing region for right eye 11 Gradation conversion part AR Display region Ccs Retention capacitance Csi CS line (retention capacitance wiring)
Gi gate line (scanning signal line)
P pixel PE pixel electrode Pa, Pb sub pixel Sj source line (data signal line)
Tr transistor

Claims

A display comprising: a first pixel including a first bright subpixel and a first dark subpixel adjacent to each other in the column direction; and a second pixel including a second bright subpixel and a second dark subpixel adjacent to each other in the column direction. A display device comprising a layer and a polarization control layer arranged to overlap the display layer and controlling a polarization state of light emitted from the pixel, and capable of displaying a two-dimensional image and a three-dimensional image. ,
The first bright sub-pixel and the second dark sub-pixel are arranged side by side in the row direction,
The first dark sub-pixel and the second bright sub-pixel are arranged side by side in the row direction,
The polarization control layer includes two types of polarization regions that make the polarization states of light different from each other,
The first dark sub-pixel and the second bright sub-pixel are arranged at positions corresponding to boundaries between the two types of polarization regions,
A display device comprising: a display control unit that displays an image on the first pixel and displays black on the second pixel when displaying a three-dimensional image.
The display layer includes a third bright subpixel and a third dark subpixel that are adjacent to each other in the column direction, a third pixel that is adjacent to the first pixel in the column direction, and a fourth light that is adjacent to the first pixel in the column direction. A fourth pixel including a sub-pixel and a fourth dark sub-pixel and adjacent to the second pixel in the column direction,
The first dark sub-pixel and the third bright sub-pixel are disposed adjacent to each other in the column direction,
The second bright sub-pixel and the fourth dark sub-pixel are disposed adjacent to each other in the column direction,
The third bright sub-pixel and the fourth dark sub-pixel are arranged side by side in the row direction,
The third dark sub-pixel and the fourth bright sub-pixel are arranged side by side in the row direction,
When displaying the three-dimensional image, the display control unit displays the first eye image on the first pixel, displays the second eye image on the third pixel, and displays the second pixel and the second pixel. The display device according to claim 1, wherein the fourth pixel displays black.
The display layer includes a first storage capacitor line and a second storage capacitor line,
The first bright sub-pixel and the second dark sub-pixel form a storage capacitor with the first storage capacitor line,
The first dark sub-pixel and the second bright sub-pixel form a storage capacitor with the second storage capacitor line,
The display control unit drives the first storage capacitor line and the second storage capacitor line to darken the first dark subpixel and the second dark subpixel. 3. The display device according to 1 or 2.
When displaying a three-dimensional image, the display control unit increases the amplitude of the storage capacitor line signal supplied to the first storage capacitor line and the second storage capacitor line, compared to when displaying a two-dimensional image. The display device according to claim 3.
The display layer includes a first scanning signal line, a first data signal line, and a second data signal line,
The first bright sub-pixel and the first dark sub-pixel are connected to the first scanning signal line and the first data signal line,
The second bright sub-pixel and the second dark sub-pixel are connected to the first scanning signal line and the second data signal line,
The display control unit controls display of the first pixel and the second pixel by driving the first scanning signal line, the first data signal line, and the second data signal line. The display device according to any one of claims 1 to 4.
The display device according to any one of claims 1 to 5, wherein when the two-dimensional image is displayed, the display control unit displays the image on the first pixel and the second pixel.
7. The liquid crystal display element according to claim 1, wherein the first bright sub-pixel, the second dark sub-pixel, the first dark sub-pixel, and the second bright sub-pixel are liquid crystal display elements including a liquid crystal capacitor. The display device according to any one of the above.
The display device according to claim 7, wherein the liquid crystal display element includes vertically aligned liquid crystal.
A display layer including a plurality of pixels and a polarization control layer that is arranged so as to overlap the display layer and controls the polarization state of light emitted from the pixels can display a two-dimensional image and a three-dimensional image. A display device,
Each pixel includes a first sub-pixel located on the upper side in the column direction and a second sub-pixel located on the lower side in the column direction,
Among the plurality of pixels, in the first type pixel, the first sub pixel performs bright display, and the second sub pixel performs dark display, and in the second type pixel, the first sub pixel. Performs dark display, and the second sub-pixel performs bright display,
The polarization control layer includes two types of polarization regions that make the polarization states of light different from each other,
The second sub-pixel is disposed at a position corresponding to a boundary between the two types of polarization regions,
When displaying a three-dimensional image, the first-type pixel is alternately displayed for each pixel row on the first-type pixel, and the second-type pixel is displayed on black. A display device comprising a control unit.
A display layer including a plurality of pixels and a polarization control layer that is arranged so as to overlap the display layer and controls the polarization state of light emitted from the pixels can display a two-dimensional image and a three-dimensional image. A display device,
Each pixel includes a bright sub-pixel and a dark sub-pixel,
The polarization control layer includes two types of polarization regions that make the polarization states of light different from each other,
When displaying a three-dimensional image, among the plurality of pixels, a pixel in which the bright sub-pixel is arranged at a position corresponding to a boundary between the two types of polarization regions is displayed in black, and the two types of polarization A display device comprising: a display control unit configured to display an image for a pixel in which the bright sub-pixel is arranged at a position not corresponding to a boundary of a region.