JP2019179195A - Liquid crystal display device - Google Patents

Abstract

To provide a liquid crystal display device with a simple structure, which has an area where two display panels overlap with each other and an area where they do not overlap with each other in plan view.SOLUTION: The liquid crystal display device includes: a first display panel DP1 that has a backlight BL and a first display area DA1, which are disposed on the same plane; and a second display panel DP2 the entire of which overlaps with a part of the first display area DA1 in plan view and which is disposed between the first display panel DP1 and the backlight BL. The backlight BL has an area that opposes the first display area DA1 being interposed by the second display area DA2 and an area that opposes the first display area DA1 without being interposed by the second display area DA2.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a liquid crystal display device.

  In the following patent document, the display device has two display panels, and the two display panels are divided into a region where the two display panels overlap in a plan view and a region where the two display panels do not overlap in a plan view, respectively. A configuration having a backlight is disclosed.

JP 2008-158174 A

  In the conventional configuration, the problem is that the structure is complicated. That is, in the above conventional configuration, the structure is complicated because it is necessary to divide the backlight separately into a region where the display regions of the two display panels overlap in a plan view and a region where they do not overlap. It was.

  An object of the present disclosure is to realize a display device having a region in which two display panels overlap in a plan view and a region in which the two display panels do not overlap with a simple structure.

  In order to solve the above problems, a liquid crystal display device according to the present disclosure includes a backlight arranged on the same plane, a first display panel having a first display area, and one of the first display areas. And a second display panel that is overlapped with the whole in a plan view, and is disposed between the first display panel and the backlight, and the backlight includes And an area facing the first display area via the second display area, and an area facing the first display area without going through the second display area.

  According to the liquid crystal display device according to the present disclosure, a liquid crystal display device having a region in which the display regions of two display panels overlap in a plan view and a region in which the display regions do not overlap can be realized with a simple structure.

FIG. 1 is a schematic step view showing the liquid crystal display device according to the first embodiment. FIG. 2 is a schematic step view showing the liquid crystal display device according to the first embodiment. FIG. 3 is a schematic step view showing the liquid crystal display device according to the first embodiment. FIG. 4 is a schematic step view showing the liquid crystal display device according to the first embodiment. FIG. 5 is a schematic plan view showing the arrangement of the second drive circuit and the wiring in the second display panel of the first embodiment. FIG. 6 is a schematic step view showing the liquid crystal display device according to the first embodiment. FIG. 7 is a schematic step view showing the liquid crystal display device according to the first embodiment. FIG. 8 is a schematic step view showing the liquid crystal display device according to the first embodiment. FIG. 9 is a schematic step view showing the liquid crystal display device according to the first embodiment. FIG. 10 is a schematic step view showing the liquid crystal display device according to the first embodiment. FIG. 11 is a schematic step view showing the liquid crystal display device according to the first embodiment. FIG. 12 is a schematic step view showing the liquid crystal display device according to the first embodiment. FIG. 13 is a schematic step view showing the liquid crystal display device according to the first embodiment. FIG. 14 is a schematic plan view showing the liquid crystal display device according to the first embodiment. FIG. 15 is a schematic plan view showing the liquid crystal display device according to the first embodiment.

[First Embodiment]
A first embodiment of the present disclosure will be described below with reference to the drawings.

  As shown in FIG. 1, the liquid crystal display device according to the present embodiment includes a backlight BL, a first display panel DP1 having a first display area DA1, and a second display area DA2 arranged on the same plane. And a second display panel DP2 disposed between the first display panel DP1 and the backlight BL. The second display area DA2 has a smaller area than the first display area DA1, and the whole of the second display area DA2 overlaps with a part of the first display area DA1 in plan view.

  The backlight BL has a region facing the first display region DA1 through the second display region DA2, and a region facing the first display region DA1 without passing through the second display region DA2. . In the present embodiment, the backlight BL overlaps the entire first display area DA1 in plan view, and overlaps both the first display area DA1 and the second display area DA2 in plan view. And an area that overlaps only the first display area DA1 in plan view.

  With such a configuration, a liquid crystal display device having a region where the display regions of the two display panels overlap in a plan view and a region where the display regions do not overlap can be realized with a simple structure. That is, as shown in FIG. 1, the backlight BL arranged on the same plane includes a first display area DA1 and an area where the first display area DA1 and the second display area DA2 overlap in plan view. And the second display area DA2 and the area where the second display area DA2 does not overlap, the backlight is divided into an area where the two display areas overlap in plan view, and an area where the display area DA2 does not overlap There is no need to arrange the steps with a step, and a simple structure can be realized.

  Hereinafter, a more specific configuration including an arbitrary configuration of the liquid crystal display device of the present disclosure will be described.

  A first polarizing plate P1 is disposed between the first display panel DP1 and the second display panel DP2, and the first polarizing plate P1 has a first polarization direction. A fourth polarizing plate P4 is disposed on the display surface side of the first display panel DP1, and the fourth polarizing plate P4 has a second polarization direction orthogonal to the first polarization direction. . That is, the first polarizing plate P1 and the fourth polarizing plate P4 are in a crossed Nicols state. Then, by controlling the voltage applied to the first liquid crystal layer LCD1 disposed between the first thin film transistor substrate TFT1 and the first counter substrate CF1 included in the first display panel DP1, the first display is controlled. In the area DA1, it is possible to display the first image. Note that the first display area DA1 is an area that includes the first thin film transistor substrate TFT1 to the first counter substrate CF1 that overlap the range in which the first image is displayed in plan view.

  A fifth polarizing plate P5 is disposed on the display surface side of the second display panel DP2, and the fifth polarizing plate P5 has the first polarization direction. A third polarizing plate P3 is disposed on the back side of the second display panel DP2, and the third polarizing plate P3 has a second polarization direction. That is, the third polarizing plate P3 and the fifth polarizing plate P5 are in a crossed Nicols state. Then, by controlling the voltage applied to the second liquid crystal layer LCD2 disposed between the second thin film transistor substrate TFT2 and the second counter substrate CF2 included in the second display panel DP2, the second display is controlled. A second image can be displayed in the area DA2. Note that the second display area DA2 is an area that includes the second thin film transistor substrate TFT2 to the second counter substrate CF2 that overlap the range in which the second image is displayed in plan view.

  In this way, the first display area DA1 and the second display area DA2 are configured to display images, respectively, so that the first display area DA1 and the second display area DA2 are superimposed in plan view. In the region, a high contrast can be realized. On the other hand, in the area where the first display area DA1 does not overlap with the second display area DA2 in plan view, the light of the backlight BL directly reaches the first display area DA1, and thus the same backlight BL is transmitted. Even if it is used, a high-luminance image display can be realized.

  In addition, it is desirable to interpose the diffuser plate DM between the fifth polarizing plate P5 and the first polarizing plate P1.

  The first display panel DP1 includes a first drive circuit DC1 that drives the first display panel DP1 in a first region A1 that is an end region thereof, and the second display panel DP2 includes an end portion thereof. A second drive circuit DC2 for driving the second display panel DP2 is included in the second region A2, which is a region.

  In the example shown in FIG. 1, the first area A1 and the second area A2 do not overlap in plan view, and the second area A2 overlaps with the first display area DA1 in plan view. It has a configuration. In such a configuration, it is desirable to always display a black image in the first display region DA1 in a region overlapping the second region A2 in plan view. With such a configuration, it is possible to hide discontinuous portions in the image displayed by the liquid crystal display device.

  Note that the method for hiding discontinuous portions in the image displayed by the liquid crystal display device is not limited to the above. For example, the first display panel DP1 is disposed on the back side so as to face the first thin film transistor substrate TFT1 and the first thin film transistor substrate TFT1, and includes a first counter substrate including a color filter and a black matrix. In the case of including CF1, a black matrix may be arranged on the first counter substrate CF1 so as to cover the second region A2 when viewed from the display surface side.

  In the configuration shown in FIG. 1, the first region A1 in which the first drive circuit DC1 is arranged and the second region A2 in which the second drive circuit DC2 is arranged overlap in plan view. An example of a configuration that does not include is given, but as illustrated in FIG. 2, the first region A1 and the second region A2 may be overlapped in a plan view.

  In the configuration shown in FIG. 1 and FIG. 2, the configuration in which the area of the second display panel DP2 is smaller than the area of the first display panel DP1 is taken as an example. As described above, a configuration in which the area of the first display panel DP1 and the area of the second display panel DP2 are substantially equal may be used.

  In the configuration shown in FIG. 3, in the second display panel DP2, the second liquid crystal layer LCD2 and the first display area DA1 overlap each other in plan view, and no display area NDA (first display) A non-display area NDA1, and a second non-display area NDA2). Note that the non-display area NDA is a part of a range in which the display area DA1 overlaps with the range where the second liquid crystal layer LCD2 surrounded by the seal member is formed, and overlaps with this range in plan view. This is a region including the second thin film transistor substrate TFT2 to the second counter substrate CF2. In the non-display area NDA, the second thin film transistor substrate TFT2 is configured not to include a pixel electrode or a common electrode, and no voltage is applied to the second liquid crystal layer LCD2.

  On the back side of the non-display area NDA of the second display panel DP2, a second polarizing plate P2 having the same first polarization direction as the first polarizing plate P1 is disposed. On the other hand, on the display surface side of the non-display area NDA of the second display panel DP2, no other polarizing plate is interposed between the second display panel DP2 and the first polarizing plate P1. . Between the first polarizing plate P1 and the second polarizing plate P2, it is in a normally white state, and in a state where no voltage is applied to the second liquid crystal layer LCD2, the light from the backlight BL is The polarized light having the first polarization direction is transmitted to the first display panel DP1. By disposing the second polarizing plate P2, it is possible to prevent the liquid crystal contained in the second liquid crystal layer LCD2 from being decomposed by irradiating the light from the backlight BL as it is. .

  In the configuration shown in FIG. 4, instead of providing a polarizing plate, a film UVB that blocks ultraviolet light may be arranged on the back side of the non-display area NDA of the second display panel DP2. Since the polarizing plate is not present on the display surface side and the back surface side of the second display panel DP2, the backlight BL light is transmitted to the first display panel DP1. In addition, by disposing the film UVB that blocks ultraviolet light, it is possible to prevent the liquid crystal contained in the second liquid crystal layer LCD2 from being decomposed by the ultraviolet light contained in the light of the backlight BL. It becomes possible.

  FIG. 5 is a schematic plan view showing the arrangement of the second drive circuit DC2 and the wiring connected to the second drive circuit DC2 in the second display panel DP2 shown in FIGS. is there.

  As shown in FIG. 5, the second display panel DP2 includes a source driver DC2S and a gate driver DC2G as the second drive circuit DC2. As shown in FIGS. 3 and 4, the second display panel DP2 has a first non-display area NDA1 and a second non-display area NDA2 as the non-display area NDA. The first non-display area NDA1 is arranged between the gate driver DC2G which is the second drive circuit DC2 and the second display area DA2 in plan view, and the second non-display area NDA2 The second display area DA2 is disposed on the opposite side of the first non-display area NDA1.

  A source wiring as a plurality of first wirings L1 extending in the first direction is connected to the source driver DC2S, and the gate driver DC2G extends in a second direction that intersects the first direction. A plurality of gate lines as the second lines L2 are connected.

  As described above, in the non-display area NDA, the second thin film transistor substrate TFT2 does not include a pixel electrode or a common electrode. Originally, the first wiring L1 and the second wiring L2 are not connected to the first display. There is no need to extend into the non-display area NDA1 and the second non-display area NDA2. Therefore, the second thin film transistor substrate TFT2 is configured not to include the first wiring L1 in the first non-display area NDA1 and the second non-display area NDA2. However, since the first non-display area NDA1 is disposed between the gate driver DC2G which is the second drive circuit DC2 and the second display area DA2, the first non-display area NDA1 is extended to the second display area DA2. The second wiring L2 is configured to pass through the first non-display area NDA1. Therefore, the second thin film transistor substrate TFT2 includes the second wiring L2 in the first non-display area NDA1. On the other hand, the second non-display area NDA2 is not disposed between the second drive circuit DC2 and the second display area DA2, and thus does not include the second wiring L2.

  Note that the display device as a whole has a high-luminance image in a region that overlaps the first non-display region NDA1 in plan view, that is, a region in which the first display region DA1 and second display region DA2 do not overlap in plan view. For the purpose of realizing display, it is desirable to make the width of the second wiring L2 in the first non-display area NDA1 narrower than the width of the second wiring L2 in the second display area DA2.

  Further, the wiring resistance of the second wiring L2 is lowered by making the width of the second wiring L2 in the second display area DA2 larger than the width of the second wiring L2 in the first non-display area NDA1. Can be desirable.

  In the example shown in FIG. 5, the gate wiring is used as an example of the second wiring L2 extending in the second direction. However, the second wiring L2 extending in the second direction serves as the common electrode. In the case of the common wiring to be connected, or in the case where the second wiring L2 extending in the second direction is the source wiring by reversing the arrangement relationship between the gate driver DC2G and the source driver DC2S as the second driving circuit DC2. Even if there is, it is the same. That is, in the first non-display area NDA1 arranged between the second drive circuit DC2 and the second display area DA2, the second wiring L2 for routing to the second display area DA2 is arranged. In the second non-display area NDA2, it is desirable that the second wiring L2 is not disposed. In the first non-display area NDA1, the width of the second wiring L2 is set to the second display area. It is desirable to make it narrower than the width of the second wiring L2 in DA2.

  In the example described with reference to FIGS. 1 to 4, the fourth polarizing plate P4 and the first polarizing plate P1 that are in a crossed Nicols state are provided on the display surface side and the back surface side of the first display panel DP1. By disposing a fifth polarizing plate P5 and a third polarizing plate P3 that are in a crossed Nicol state on the display surface side and the back surface side of the second display panel DP2, the first display area DA1 Although an example has been described in which high contrast is realized in an area where the second display area DA2 overlaps in plan view, the present disclosure is not limited to this configuration.

  FIGS. 6 to 9 show a configuration for realizing DFD (Depth-fused 3D) display in an area where the first display area DA1 and the second display area DA2 described above with reference to FIGS. An example will be described.

  DFD is a method for providing a three-dimensional image by stacking two two-dimensional images. A two-dimensional projection image of a three-dimensional image to be displayed is displayed on two display panels arranged on the display surface side and the back side so as to overlap each other when viewed from the viewer's position. Thereby, the viewer feels two two-dimensional projection images as one stereoscopic image fused in the depth direction.

  In the example shown in FIGS. 6 to 9, the first display panel DP1 and the second display panel DP2 are replaced with the fourth polarizing plate P4 disposed on the display surface side of the first display panel DP1 and the second display. It arrange | positions between the 2nd polarizing plates P2 arrange | positioned at the back side of panel DP2. By adopting such a configuration, each polarization change in the first display panel DP1 and the second display panel DP2 is added.

  The configuration shown in FIGS. 6 to 9 will be briefly described below.

  In the example shown in FIG. 6, the liquid crystal display device has a backlight BL, a first display panel DP1 having a first display area DA1, and a second display area DA2, and the first display panel DP1. And a second display panel DP2 disposed between the backlight BL. The second display area DA2 has a smaller area than the first display area DA1, and the whole of the second display area DA2 overlaps with a part of the first display area DA1 in plan view.

  The backlight BL has a region facing the first display region DA1 through the second display region DA2, and a region facing the first display region DA1 without passing through the second display region DA2. . In the present embodiment, the backlight BL overlaps the entire first display area DA1 in plan view, and overlaps both the first display area DA1 and the second display area DA2 in plan view. And an area that overlaps only the first display area DA1 in plan view.

  With such a configuration, a liquid crystal display device having a region where the display regions of the two display panels overlap in a plan view and a region where the display regions do not overlap can be realized with a simple structure.

  A region where the first display region DA1 and the second display region DA2 overlap in plan view between the first display panel DP1 and the second display panel DP2 does not include a polarizing plate. ing. A fourth polarizing plate P4 having a second polarization direction is arranged on the display surface side of the first display panel DP1, and a second polarizing plate P4 having the first polarization direction is arranged on the back side of the second display panel DP2. A polarizing plate P2 is disposed, and the second polarizing plate P2 and the fourth polarizing plate P4 are in a crossed Nicols state.

  In a region where the first display area DA1 does not overlap with the second display area DA2 in plan view, a fourth polarizing plate P4 is disposed on the display surface side of the first display panel DP1, and on the back side. Is provided with a first polarizing plate P1. The first polarizing plate P1 has a first polarization direction, and the fourth polarizing plate P4 has a second polarization direction orthogonal to the first polarization direction. That is, the first polarizing plate P1 and the fourth polarizing plate P4 are in a crossed Nicols state. Then, by controlling the voltage applied to the first liquid crystal layer LCD1 disposed between the first thin film transistor substrate TFT1 and the first counter substrate CF1 included in the first display panel DP1, the first display is controlled. In the area DA1, it is possible to display the first image.

  In such a configuration, in the area where the first display area DA1 and the second display area DA2 overlap in plan view, DFD display can be realized, and the first display area DA1 In the area that does not overlap with the second display area DA2 in plan view, the light of the backlight BL directly reaches the first display area DA1, so that even when the same backlight BL is used, a high-luminance image display is performed. Can be realized.

  In the example shown in FIG. 6, the first area A1 and the second area A2 do not overlap in plan view, and the second area A2 overlaps with the first display area DA1 in plan view. It has a configuration. In such a configuration, it is desirable to always display a black image in the first display region DA1 in a region overlapping the second region A2 in plan view. Or it is good also as a structure which arrange | positions a black matrix so that 2nd area | region A2 may be covered seeing from the display surface side.

  In the configuration illustrated in FIG. 6, the first region A1 in which the first drive circuit DC1 is disposed and the second region A2 in which the second drive circuit DC2 is disposed are overlapped in plan view. Although the configuration that is not performed is given as an example, as illustrated in FIG. 7, the first region A1 and the second region A2 may be overlapped in plan view.

  6 and 7 exemplify a configuration in which the area of the second display panel DP2 is smaller than the area of the first display panel DP1, the examples shown in FIGS. As described above, the area of the first display panel DP1 and the area of the second display panel DP2 may be substantially equal.

  In the configuration shown in FIG. 8, in the second display panel DP2, the second liquid crystal layer LCD2 and the first display area DA1 overlap each other in plan view, and no display area NDA (first display) A non-display area NDA1, and a second non-display area NDA2). In the non-display area NDA, the second thin film transistor substrate TFT2 is configured not to include a pixel electrode or a common electrode, and no voltage is applied to the second liquid crystal layer LCD2.

  On the back side of the non-display area NDA of the second display panel DP2, a second polarizing plate P2 having the same first polarization direction as the first polarizing plate P1 is disposed. On the other hand, on the display surface side of the non-display area NDA of the second display panel DP2, no other polarizing plate is interposed between the second display panel DP2 and the first polarizing plate P1. . Between the first polarizing plate P1 and the second polarizing plate P2, it is in a normally white state, and in a state where no voltage is applied to the second liquid crystal layer LCD2, the light from the backlight BL is The polarized light having the first polarization direction is transmitted to the first display panel DP1.

  In the configuration shown in FIG. 9, a film UVB that blocks ultraviolet light may be disposed on the back side of the non-display area NDA of the second display panel DP2 instead of providing a polarizing plate. Since the polarizing plate is not present on the display surface side and the back surface side of the second display panel DP2, the light of the backlight BL is transmitted to the first display panel DP1. In addition, by disposing the film UVB that blocks ultraviolet light, it is possible to prevent the liquid crystal contained in the second liquid crystal layer LCD2 from being decomposed by the ultraviolet light contained in the light of the backlight BL. It becomes possible.

  8 and 9, the first non-display area disposed between the second drive circuit DC2 and the second display area DA2 is the same as the range disclosed in FIGS. In the NDA1, it is desirable that the second wiring L2 for routing to the second display area DA2 is arranged, and the second wiring L2 is not arranged in the second non-display area NDA2. In the non-display area NDA1, it is desirable to make the width of the second wiring L2 narrower than the width of the second wiring L2 in the second display area DA2. Further, it is desirable that the second thin film transistor substrate TFT2 does not include the first wiring L1 in the first non-display area NDA1 and the second non-display area NDA2.

  10 to 13, the above-described high luminance region, high contrast region, and DFD display region may be realized in one liquid crystal display device.

  FIG. 10 is a combination of the configurations described above with reference to FIGS. 1 and 6, and the second display area DA2 includes a high contrast DA21 and a DFD display area DA22. In the configuration shown in FIG. 10, the two second areas A2 overlap with the first display area DA1 in plan view. Accordingly, in the first display area DA1, in the area overlapping the two second areas A2 in plan view, a black image is always displayed, or the second area A2 as viewed from the display surface side. It is desirable that the black matrix be arranged so as to cover the surface.

  FIG. 11 is a combination of the configurations described above with reference to FIGS. 2 and 7, and the second display area DA2 includes a high contrast DA21 and a DFD display area DA22. In the configuration shown in FIG. 11, the first region A1 and the second region A2 overlap in plan view.

  In the configuration shown in FIG. 12 and FIG. 13, the first display panel DP1 and the second display panel DP2 are different from the second display area DA2 and overlap in plan view.

  In the configuration shown in FIG. 12, the second display panel DP2 includes a first non-display area NDA1 in which the second liquid crystal layer LCD2 and the first display area DA1 overlap each other in plan view and do not display an image. In addition. In the first non-display area NDA1, the second thin film transistor substrate TFT2 does not include a pixel electrode or a common electrode, and no voltage is applied to the second liquid crystal layer LCD2.

  On the back side of the first non-display area NDA1 of the second display panel DP2, a second polarizing plate P2 having the same first polarization direction as the first polarizing plate P1 is disposed. On the other hand, on the display surface side of the first non-display area NDA1 of the second display panel DP2, no other polarizing plate is interposed between the second display panel DP2 and the first polarizing plate P1. It has become. Between the first polarizing plate P1 and the second polarizing plate P2, it is in a normally white state, and in a state where no voltage is applied to the second liquid crystal layer LCD2, the light from the backlight BL is The polarized light having the first polarization direction is transmitted to the first display panel DP1.

  In the configuration shown in FIG. 13, a film UVB that blocks ultraviolet light may be arranged on the back side of the first non-display area NDA1 of the second display panel DP2 instead of providing a polarizing plate. . Since the polarizing plate is not present on the display surface side and the back surface side of the second display panel DP2, the light of the backlight BL is transmitted to the first display panel DP1. In addition, by disposing the film UVB that blocks ultraviolet light, it is possible to prevent the liquid crystal contained in the second liquid crystal layer LCD2 from being decomposed by the ultraviolet light contained in the light of the backlight BL. It becomes possible.

  12 and 13, the first non-display area NDA1 arranged between the second drive circuit DC2 and the second display area DA2 is routed to the second display area DA2. For this reason, it is desirable that the second wiring L2 is disposed and the second wiring L2 is not disposed in the second non-display area NDA2, and the second wiring L2 is disposed in the first non-display area NDA1. It is desirable to make the width of L2 narrower than the width of the second wiring L2 in the second display area DA2. Further, it is desirable that the second thin film transistor substrate TFT2 does not include the first wiring L1 in the first non-display area NDA1 and the second non-display area NDA2.

  Note that the second display area DA2 described above with reference to FIGS. 1 to 13 may be non-rectangular.

  For example, as shown in FIGS. 1, 6, and 10, the area of the second display panel DP2 is smaller than the area of the first display panel DP1, and the second area A2 is defined as the first display area DA1. In the configuration of overlapping in a plan view, as shown in FIG. 14, the second display panel DP2 having the non-rectangular second display area DA2 is arranged on the back side of the first display panel DP1. It is good. In this case, for example, in the configuration shown in FIG. 1, the third polarizing plate P3 that defines the outer shape of the second display panel DP2 and the fifth polarizing plate P5 that defines the outer shape of the second display area DA2 are provided. It becomes non-rectangular. In the configuration shown in FIG. 6, the second polarizing plate P2 that defines the outer shape of the second display panel DP2 is non-rectangular. Further, in the configuration shown in FIG. 10, the second polarizing plate P2, the third polarizing plate P3 that defines the outer shape of the second display panel DP2, and the fifth polarizing plate P5 that defines the high contrast DA21 are provided. It becomes non-rectangular.

  Also, as shown in FIGS. 3, 4, 8, and 9, the area of the first display panel DP1 and the area of the second display panel DP2 are substantially equal, and the first display panel DP1 and the second display panel DP2 15 may be configured such that the non-rectangular second display area DA2 overlaps the first display area DA1 in plan view as shown in FIG. In this case, for example, in the configuration shown in FIGS. 3 and 4, the third polarizing plate P3 and the fifth polarizing plate P5 that define the second display area DA2 are non-rectangular, and are shown in FIGS. If it is a structure, the 2nd polarizing plate P2 which prescribes | regulates 2nd display area DA2 will become non-rectangular shape.

  In the configuration described above, when the backlight BL includes a plurality of LEDs, the LEDs per unit area in the region where the backlight BL faces the first display region DA1 via the second display region DA2. The number and the number of LEDs per unit area in the region where the backlight BL faces the first display region DA1 without the second display region DA2 may be different.

  For example, in the area where the backlight BL is opposed to the first display area DA1 without passing through the second display area DA2, the first display area DA1 and the second display area DA2 overlap in plan view. Compared with the area, it is already configured to realize display with high luminance. Therefore, the number of LEDs per unit area in the area where the backlight BL is opposed to the first display area DA1 without passing through the second display area DA2, the backlight BL is in the second display area DA2. The configuration may be less than the number of LEDs per unit area in the region facing the first display region DA1.

  Conversely, in a region where the first display region DA1 and the second display region DA2 overlap in a plan view, that is, a region where high contrast or DFD display is required, high brightness display may be unnecessary. . In such a case, the number of LEDs per unit area in the region where the backlight BL faces the first display region DA1 via the second display region DA2 is the backlight BL. It is good also as a structure smaller than the number of LED per unit area in the area | region which opposes 1st display area DA1 not via display area DA2.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said each embodiment, The form suitably changed by those skilled in the art from said each embodiment within the range which does not deviate from the meaning of this invention. Needless to say, it is included in the technical scope of the present invention.

BL backlight, DP1 first display panel, TFT1 first thin film transistor substrate, CF1 first counter substrate, LCD1 first liquid crystal layer, DA1 first display area, DC1 first drive circuit, A1 first Area, DP2 second display panel, TFT2 second thin film transistor substrate, CF2 second counter substrate, LCD2 second liquid crystal layer, DA2 second display area, DA21 high contrast area, DA22 DFD display area, DC2 second Drive circuit, DC2S source driver, DC2G gate driver, L1 first wiring, L2 second wiring, A2 second area, NDA non-display area, NDA1 first non-display area, NDA2 second non-display area , P1 first polarizing plate, P2 second polarizing plate, P3 third polarizing plate, P4 fourth polarizing plate, P5 fifth polarizing plate, DM diffusion , UVB film.

Claims (20)

A backlight arranged on the same plane;
A first display panel having a first display area;
A second display panel disposed between the first display panel and the backlight, the second display area having a second display area that overlaps a part of the first display area in plan view; ,
Including
The backlight is
An area facing the first display area via the second display area;
An area facing the first display area without going through the second display area,
Liquid crystal display device. The liquid crystal display device according to claim 1, wherein an area of the first display panel and an area of the second display panel are substantially the same. The first display area overlaps with a second area in which a second drive circuit for driving the second display panel is disposed in a plan view,
In the first display area, the area overlapping the second area in plan view always displays a black image.
The liquid crystal display device according to claim 1. The first display panel includes:
A first thin film transistor substrate;
A first counter substrate disposed opposite to the first thin film transistor substrate and including a color filter and a black matrix;
The first display panel overlaps with a second region in which a second drive circuit for driving the second display panel is disposed in a plan view,
The black matrix is disposed so as to cover the second region when viewed from the display surface side.
The liquid crystal display device according to claim 1. A first region in which a first drive circuit for driving the first display panel is disposed;
A second region where a second drive circuit for driving the second display panel is disposed overlaps in plan view;
The liquid crystal display device according to claim 1. The second display panel is
A second thin film transistor substrate;
A second counter substrate disposed opposite to the second thin film transistor substrate;
A second liquid crystal layer sandwiched between the second thin film transistor substrate and the second counter substrate;
A non-display area where the second liquid crystal layer and the first display area overlap in a plan view and do not display an image;
A first polarizing plate having a first polarization direction, disposed between the second display panel and the first display panel;
A second polarizing plate that overlaps the non-display area in a plan view and is disposed between the second display panel and the backlight and having the first polarization direction;
Further including
The liquid crystal display device according to claim 1. Third polarization having a second polarization direction that overlaps with the second display region in a plan view, is disposed between the second display panel and the backlight, and intersects the first polarization direction. Including board,
The liquid crystal display device according to claim 6. The second display panel is
A second thin film transistor substrate;
A second counter substrate disposed opposite to the second thin film transistor substrate;
A second liquid crystal layer sandwiched between the second thin film transistor substrate and the second counter substrate;
A non-display area where the second liquid crystal layer and the first display area overlap in a plan view and do not display an image;
The second thin film transistor substrate does not include a pixel electrode in the non-display area;
The liquid crystal display device according to claim 1. The second display panel further includes a second drive circuit for driving the second display panel,
The non-display area includes a first non-display area located between the second drive circuit and the second display area in plan view;
The second thin film transistor substrate includes a plurality of first wirings extending in a first direction and a plurality of second wirings extending in a second direction different from the first direction in the second display region. Including,
The second wiring is connected to the second display area from the second drive circuit through the first non-display area,
The second thin film transistor substrate does not include the first wiring in the first non-display area;
The liquid crystal display device according to claim 6. The width of the second wiring in the second display area is thicker than the width of the second wiring in the first non-display area.
The liquid crystal display device according to claim 9. The non-display area further includes a second non-display area disposed on a side opposite to the first non-display area with respect to the second display area in plan view,
The second thin film transistor substrate does not include the second wiring in the second non-display area;
The liquid crystal display device according to claim 9. The second wiring is a gate wiring;
The liquid crystal display device according to claim 9. The second wiring is a common wiring.
The liquid crystal display device according to claim 9. The second wiring is a source wiring.
The liquid crystal display device according to claim 9. The second display panel is
A second thin film transistor substrate;
A second counter substrate disposed opposite to the second thin film transistor substrate;
A second liquid crystal layer sandwiched between the second thin film transistor substrate and the second counter substrate;
A non-display area where the second liquid crystal layer and the first display area overlap in a plan view and do not display an image;
Further comprising a film arranged between the non-display area and the backlight to block ultraviolet light;
The liquid crystal display device according to claim 1. Including a third polarizing plate disposed between the second display panel and the backlight so as to overlap the second display region in plan view.
The liquid crystal display device according to claim 15. In plan view, the shape of the first display panel is rectangular,
In plan view, the shape of the second display panel is a non-rectangular shape.
The liquid crystal display device according to claim 1. The second display panel is
A second thin film transistor substrate;
A second counter substrate disposed opposite to the second thin film transistor substrate;
A second liquid crystal layer sandwiched between the second thin film transistor substrate and the second counter substrate;
A non-display area where the second liquid crystal layer and the first display area overlap in a plan view and do not display an image;
A fourth polarizing plate disposed on the display surface side of the first display panel and having a second polarization direction;
The second display panel overlaps the non-display area and the second display area in a plan view, is disposed between the second display panel and the backlight, and intersects the second polarization direction. A second polarizing plate having a first polarization direction,
Further including
The liquid crystal display device according to claim 1. A first polarizing plate that overlaps with the non-display area in a plan view, is disposed between the first display panel and the second display panel, and has the first polarization direction;
The region overlapping the second display region in plan view between the first display panel and the second display panel does not include a polarizing plate.
The liquid crystal display device according to claim 18. The backlight includes a plurality of LEDs;
The number of the LEDs per unit area in a region where the backlight is opposed to the first display region via the second display region;
The number of the LEDs per unit area in a region where the backlight is opposed to the first display region without passing through the second display region is different.
The liquid crystal display device according to claim 1.

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