Indication device

Abstract

A dual-view display device is realized with a simple configuration. [Solution] The display device (1) comprises a plurality of left pixel rows (2) including a plurality of left pixels (PL), a plurality of right pixel rows (3) including a plurality of right pixels (PR), a parallax barrier (4), a left pixel signal line (5) commonly connected to the plurality of left pixels (PL), a right pixel signal line (6) commonly connected to the plurality of right pixels (PR), a black voltage line (7) that supplies a black voltage to the left pixels (PL) or right pixels, a video signal line (8) that supplies a video signal to display a common image to the left pixels (PL) and right pixels (PR), and a changeover switch (9) that switches between a first mode in which one of the left pixel signal line (5) or the right pixel signal line (6) is connected to the black voltage line (7) and the other is connected to the video signal line (8), and a second mode in which both the left pixel signal line (5) or the right pixel signal line (6) are connected to the video signal line (8).

Description

Technical Field

[0001] The present disclosure relates to a display device that presents a left image visible from the left side with respect to a display surface and a right image visible from the right side with respect to the display surface.

Background Art

[0002] In a dual-view display device that presents a left image visible from the left side with respect to a display surface and a right image visible from the right side with respect to the display surface, there is known a prior art display device (Patent Document 1) including a wide viewing angle mode in which a common image is displayed as both the left image and the right image, and a narrow viewing angle mode in which a full-screen black image is displayed on either the left image or the right image.

[0003] Such a display usually shows the same screen from two directions in the wide viewing angle mode, and realizes a narrow viewing angle only when the viewing angle is to be narrowed by showing a full-screen black image only to the driver in the narrow viewing angle mode, and can respond to the need that the function of presenting different screens in two left and right directions is unnecessary.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the above-described prior art has a problem that, since it is necessary to display different images in two left and right directions, twice the number of driver IC (Integrated Circuit) components and twice the number of image interfaces are required for a non-dual-view display panel of the same resolution.

[0006] One aspect of this disclosure aims to realize a dual-view display device with a simple configuration. [Means for solving the problem]

[0007] To solve the above problems, a display device according to one aspect of the present disclosure presents a left image that is visible from the left side of the display surface and a right image that is visible from the right side of the display surface, comprising: a plurality of left pixel rows each containing a plurality of left pixels for displaying the left image; a plurality of right pixel rows each containing a plurality of right pixels for displaying the right image; a parallax barrier that blocks light from the left pixels toward the right and light from the right pixels toward the left; a left pixel signal line provided for each left pixel row and commonly connected to the plurality of left pixels included in the left pixel row; and a right pixel signal line provided for each right pixel row, The device includes: a right pixel signal line commonly connected to the plurality of right pixels included in the right pixel column; a black voltage line that supplies a black voltage to display a black image on either the plurality of left pixels or the plurality of right pixels; a video signal line that supplies a video signal to display a common image as the left image and the right image on the left and right pixels; and a toggle switch that switches between a first mode in which only one of the left pixel signal line or the right pixel signal line is connected to the black voltage line and the other of the left pixel signal line or the right pixel signal line is connected to the video signal line, and a second mode in which both the left pixel signal line or the right pixel signal line are connected to the video signal line. [Effects of the Invention]

[0008] According to one aspect of this disclosure, a dual-view display device can be realized with a simple configuration. [Brief explanation of the drawing]

[0009] [Figure 1] This is a circuit diagram of the display device according to Embodiment 1 in wide-viewing-angle mode. [Figure 2] This is a circuit diagram of the above display device in narrow viewing angle mode. [Figure 3]This is a circuit diagram of the main components of the above-mentioned display device in wide-viewing-angle mode. [Figure 4] This is a circuit diagram of the main components of the above-mentioned display device in narrow viewing angle mode. [Figure 5] This is a schematic plan view of the above-mentioned display device. [Figure 6] This is a cross-sectional view of the above-mentioned display device. [Figure 7] This is a circuit diagram of a display device related to a comparative example. [Figure 8] This is a schematic plan view of the above-mentioned display device. [Figure 9] This is a circuit diagram of the display device according to Embodiment 2. [Figure 10] This is a circuit diagram of the main components of the display device according to Embodiment 3 in wide-viewing-angle mode for right-hand drive vehicles. [Figure 11] This is a circuit diagram of the main components of the above display device in narrow viewing angle mode for right-hand drive vehicles. [Figure 12] This is a circuit diagram of the main components of the above-mentioned display device in wide-viewing-angle mode for left-hand drive vehicles. [Figure 13] This is a circuit diagram of the main components of the above-mentioned display device in narrow viewing angle mode for left-hand drive vehicles. [Modes for carrying out the invention]

[0010] [Embodiment 1] One embodiment of this disclosure will be described in detail below.

[0011] Figure 1 is a circuit diagram of the display device 1 according to Embodiment 1 in wide-viewing-angle mode. Figure 2 is a circuit diagram of the display device 1 in narrow-viewing-angle mode. Figure 3 is a circuit diagram of the main components of the display device 1 in wide-viewing-angle mode. Figure 4 is a circuit diagram of the main components of the display device 1 in narrow-viewing-angle mode. Figure 5 is a schematic plan view of the display device 1. Figure 6 is a cross-sectional view of the display device.

[0012] The display device 1 presents a left image that is visible from the left side of the display surface, and a right image that is visible from the right side of the display surface.

[0013] As shown in FIGS. 1 and 2 for example, the display device 1 includes a plurality of left pixel columns 2 each including a plurality of left pixels PL for displaying a left image, and a plurality of right pixel columns 3 each including a plurality of right pixels PR for displaying a right image.

[0014] As shown in FIGS. 3 and 4 for example, the display device 1 includes a parallax barrier 4 that blocks light traveling from the left pixel PL in the right direction and light traveling from the right pixel PR in the left direction.

[0015] As shown in FIGS. 1 and 2 for example, the display device 1 includes a left pixel signal line 5 provided for each of the plurality of left pixel columns 2 and commonly connected to the plurality of left pixels PL included in the left pixel column 2, a right pixel signal line 6 provided for each of the plurality of right pixel columns 3 and commonly connected to the plurality of right pixels PR included in the right pixel column 3, a black voltage line 7 that supplies a black voltage BLACK for displaying a black image on either the plurality of left pixels PL or the plurality of right pixels PR, and a video signal line 8 that supplies video signals SL1 and SL2 for displaying a common image as the left image and the right image on the left pixel PL and the right pixel PR.

[0016] Then, as shown in FIG. 2 for example, the display device 1 has a narrow viewing angle mode (first mode) in which only one of the left pixel signal line 5 or the right pixel signal line 6 is connected to the black voltage line 7 and the other is connected to the video signal line 8, and a wide viewing angle mode (second mode) in which both the left pixel signal line 5 and the right pixel signal line 6 are connected to the video signal line 8 as shown in FIG. 1 for example. A switching switch 9 for switching between them is provided.

[0017] One of the left pixel signal line 5 or the right pixel signal line 6 is always connected to the video signal line 8. The switching switch 9 switches whether to connect the other of the left pixel signal line 5 or the right pixel signal line 6 to the black voltage line 7 or to the video signal line 8.

[0018] In the examples shown in Figures 1 to 4, the right pixel signal line 6 is always connected to the video signal line 8 in both the wide-angle and narrow-angle modes. The switch 9 then switches between the narrow-angle mode, in which the left pixel signal line 5 is connected to the black voltage line 7, and the wide-angle mode, in which the left pixel signal line 5 is connected to the video signal line 8.

[0019] The display device 1 further includes a switching signal line 10 that supplies a switching signal VAC to the changeover switch 9 to switch the connection destination, as shown in Figures 1 and 2, for example.

[0020] The display device 1 further includes a source driver 11 that outputs video signals SL1 and SL2, as shown in Figures 1 and 2, for example.

[0021] The display device 1 may include a self-emissive display. In that case, the black voltage may include the black signal level voltage for the self-emissive elements provided in the self-emissive display.

[0022] The display device 1 may include a normally black liquid crystal display. In that case, the black voltage may include the voltage at the Vcom potential.

[0023] The display device 1 further comprises, for example, a gate driver 14 that supplies scanning signals GL1, GL2, and GL3 to the left pixel PL and the right pixel PR, a control unit 15 that controls the source driver 11 and the gate driver 14, and a power supply circuit 13 that supplies power to the source driver 11, the gate driver 14, and the control unit 15.

[0024] The pixels PL and PR of the display device 1 are arranged in an RGB horizontal stripe pattern, as shown in Figures 3 and 4. Each of the pixels PL and PR includes subpixels corresponding to red light, green light, and blue light, arranged in the Y direction.

[0025] As shown in Figure 5, the display device 1 has 3840 pixels arranged in the X direction, consisting of 1920 left pixels PL and 1920 right pixels PR. In the Y direction, it has 2160 subpixels arranged, consisting of 720 subpixels corresponding to red light, 720 subpixels corresponding to green light, and 720 subpixels corresponding to blue light. The amount of data transmitted to the source driver 11 and the communication speed are 1920 × 2 × 720 @ 60Hz.

[0026] The operation of the display device 1 configured in this way will be explained.

[0027] First, as shown in Figures 1 and 3, in wide-angle mode, the switch 9 connects the left pixel signal line 5 to the video signal line 8 based on the switching signal VAC from the switching signal line 10. As a result, video signals SL1 and SL2 are supplied from the video signal line 8 to both the left pixel PL connected to the left pixel signal line 5 and the right pixel PR connected to the right pixel signal line 6. Therefore, in wide-angle mode, a common image is displayed as both the left and right images.

[0028] As shown in Figures 2 and 4, in narrow viewing angle mode, the switch 9 connects the left pixel signal line 5 to the black voltage line 7 based on the switching signal VAC from the switching signal line 10. Therefore, the left pixel PL connected to the left pixel signal line 5 is supplied with black voltage BLACK, and the right pixel PR connected to the right pixel signal line 6 is supplied with video signals SL1 and SL2. Consequently, in narrow viewing angle mode, a black image is displayed in the left image, and an image based on video signals SL1 and SL2 is displayed in the right image.

[0029] If the display device 1 is a self-emissive display, the black voltage BLACK can be the voltage of the black signal level for the self-emissive elements provided in the self-emissive display. If the display device 1 is a normally black liquid crystal display, the black voltage BLACK can be the voltage of the Vcom potential.

[0030] A dual-view display has been proposed that utilizes a display with a parallax barrier 4 on its surface, allowing users to freely switch between a mode that can only be viewed from one direction (narrow viewing angle mode) and a mode that can be viewed from multiple directions (wide viewing angle mode) during operation. However, dual-view displays require a large number of pixels on the display panel. This necessitates a large number of driver ICs (Integrated Circuits) to correspond to the source driver 11, and the increased number of pixels necessitates increased operating speed due to the increased amount of data to be transmitted. This makes design difficult, and problems such as high component costs and the inability to realize anything but low-performance products diminish the appeal of dual-view displays.

[0031] In a dual-view display that uses a parallax barrier 4 to obscure half of all pixels on the display panel, depending on the viewing angle, it is possible to create a system where some people 18 can see only the unobstructed portion (the image based on pixel PL shown in Figure 6), while others 19 can see only the obscured portion (the image based on pixel PR shown in Figure 6).

[0032] However, to ensure that the amount of information that needs to be displayed is not halved by using a dual-view system, a display with twice the number of pixels as the non-dual-view display is required.

[0033] For example, in the example shown in Figure 6, person 18 can only see images based on pixel PL, and cannot see images based on pixel PL. Person 19 can only see images based on pixel PR, and cannot see images based on pixel PL. Thus, in the example shown in Figure 6, each person can only see images of 3 pixels out of 6 pixels at the same time. If both person 18 and person 19 want to see 6 pixels at the same time, a display with 12 pixels is required.

[0034] A display with twice the number of pixels typically requires twice the number of display driver ICs, which increases the amount of data to be transmitted and necessitates a higher operating speed.

[0035] When focusing specifically on controlling the viewing angle, the aforementioned pixel PL and pixel PR images can be achieved by making the pixel PR image the same as the pixel PL image in wide-angle mode, and making only the pixel PR image a completely black image in narrow-angle mode.

[0036] Therefore, in this embodiment, a changeover switch 9 is provided in the display panel. In wide-viewing-angle mode, the adjacent left pixel signal line 5 and right pixel signal line 6 are connected to realize the same image (image of pixel PL = image of pixel PR). In narrow-viewing-angle mode, one of the adjacent left pixel signal line 5 and right pixel signal line 6 is connected to the Vcom potential (black signal level in self-emissive displays including OLEDs (Organic Light Emitting Diodes)) to realize the image of pixel PR = full-screen black display.

[0037] In other words, a changeover switch 9 is built into the display panel that can switch between either the adjacent left pixel signal line 5 or the right pixel signal line 6 (in the example shown in Figures 1 and 2, the left pixel signal line 5) using a switching signal VAC.

[0038] When the wide viewing angle mode is selected, as shown in Figure 1, the output of one source driver 11 (for example, the video signal SL1 in Figure 1) is connected to both the left pixel signal line 5 and the right pixel signal line 6 by the changeover switch 9, resulting in the left image of the left pixel column 2 and the right image of the right pixel column 3 being the same across the entire screen (Figure 1).

[0039] When the narrow viewing angle mode is selected, as shown in Figure 2, the output of one source driver 11 (for example, the video signal SL1 in Figure 1) is connected only to the right pixel signal line 6 by the toggle switch 9, while the left pixel signal line 5 is connected to the black voltage line 7, which supplies the black voltage BLACK corresponding to a black image, by the toggle switch 9.

[0040] This black voltage, BLACK, corresponds to the Vcom voltage in a normally black liquid crystal display, for example, and to the black signal level voltage corresponding to level 0 in an OLED. As a result, only the right image corresponding to the right pixel PR is displayed across the entire screen, and the left image corresponding to the left pixel PL is displayed as completely black (Figure 2).

[0041] This eliminates the need to increase the number of driver ICs to create a dual-view display.

[0042] Furthermore, it becomes unnecessary to prepare two types of video signal data for the image of pixel PL and the image of pixel PR, allowing it to operate at the same communication speed as conventional non-dual-view displays, sending only one type of video signal data for the image of pixel A.

[0043] Furthermore, it eliminates the need for special components to handle two types of video signal data: pixel PL images and pixel PR images. This allows for the construction of a low-cost display device using readily available components such as a local dimming control TCON (Timing Controller) with general-purpose matrix LEDs (Light Emitting Diodes).

[0044] Figure 7 is a circuit diagram of the comparative example display device. Figure 8 is a schematic plan view of the comparative example display device.

[0045] Patent Document 1 discloses a dual-view display mechanism that allows only the driver's side display to be shown in black on a single display. Conversely, in order to enable the driver's side display to be used for displays other than black, which are different from the passenger side display, multiple types of output signals, video signals SL1, SL2, etc., are supplied from the source driver 11 for each of the left pixel row 2 and right pixel row 3, as shown in Figure 7.

[0046] In contrast, in this embodiment, the application is limited to a viewing angle control display that has only two modes: a "wide viewing angle mode" in which the driver's side display is the same as the passenger's side display, and a "narrow viewing angle mode" in which the input image is displayed only on the passenger side and the driver's side is displayed as a black screen. By incorporating the circuit shown in Figures 1 and 2 into the display panel, a dual-view display can be realized with a small number of output terminals in the source driver 11.

[0047] For example, by changing from the display device with the configuration shown in Figure 8, which relates to a comparative example, to the display device with the changeover switch 9, which relates to this embodiment, the number of output terminals of the source driver 11 is halved, and a dual-view display can be realized with the same number of driver ICs as required for the original resolution (1920 x 720 in the examples of Figures 5 and 8). That is, if the dual-view display in the comparative example shown in Figure 8 requires two source drivers 11, then a non-dual-view display requires one source driver 11. In contrast, in this embodiment shown in Figure 5, only one source driver 11 is needed despite it being a dual-view display. By reducing the number of driver ICs in this way, unnecessary power consumption can also be eliminated.

[0048] Similar to the issue of the number of driver ICs mentioned earlier, the amount of video signal data sent to the source driver IC is the same as the amount of video signal data required for the original resolution (1920 x 720 in the examples of Figures 5 and 8), and can be achieved at the same transfer speed. By reducing the data transfer speed of the video signal in this way, unnecessary power consumption can also be eliminated.

[0049] Similar to the data volume and transfer speed of the video signal mentioned above, the amount of video signal data sent to the source driver IC is the same as the video signal data required for the original resolution (1920 x 720 in the examples of Figures 5 and 8). Therefore, an external circuit to generate separate black image data for the driver's side is not required outside of the source driver 11, reducing the burden on the external circuit designer.

[0050] [Embodiment 2] Other embodiments of this disclosure are described below. For the sake of clarity, components having the same function as those described in the above embodiments are denoted by the same reference numerals, and their descriptions are not repeated.

[0051] Figure 9 is a circuit diagram of the display device 1A according to Embodiment 2.

[0052] The display device 1A includes a source driver 11 that outputs video signals SL1 and SL2.

[0053] The display device 1A comprises multiple sets of left pixel rows 2 and right pixel rows 3. The display device 1A further comprises a demultiplexer switch 12 that distributes the video signals SL1 and SL2 output from the source driver 11 to one of the multiple sets.

[0054] A changeover switch 9 that can switch either the left pixel signal line 5 or the right pixel signal line 6 (for example, the left pixel signal line 5 in the example shown in Figure 9) using a switching signal VAC, and a demultiplexer switch 12 that reduces the number of output terminals of the source driver 11 by distributing the output of the source driver 11 to multiple source buses can also be built into the display panel in combination.

[0055] The example shown in Figure 9 illustrates a demultiplexer switch 12 that distributes the output of the source driver 11 to two source buses. There is no fundamental restriction on increasing the number of source buses to which the output of the source driver 11 is distributed to three, four, or more.

[0056] [Embodiment 3] Further embodiments of this disclosure are described below. For the sake of clarity, components having the same function as those described in the above embodiments are denoted by the same reference numerals, and their descriptions are not repeated.

[0057] Figure 10 is a circuit diagram of the main components of the display device 1B according to Embodiment 3 in wide-viewing-angle mode for right-hand drive vehicles. Figure 11 is a circuit diagram of the main components of the display device 1B in narrow-viewing-angle mode for right-hand drive vehicles. Figure 12 is a circuit diagram of the main components of the display device 1B in wide-viewing-angle mode for left-hand drive vehicles. Figure 13 is a circuit diagram of the main components of the display device 1B in narrow-viewing-angle mode for left-hand drive vehicles.

[0058] As shown in Figures 10 to 13, the display device 1B is equipped with a first changeover switch 9A and a second changeover switch 9B as changeover switches. The first changeover switch 9B switches whether the left pixel signal line 5 is connected to the black voltage line 7 or the video signal line 8. The second changeover switch 9A switches whether the right pixel signal line 6 is connected to the black voltage line 7 or the video signal line 8.

[0059] As shown in Figures 10 to 13, the display device 1B further includes a first switching signal line 10B that supplies a first switching signal VAC_L to a first changeover switch 9B to switch whether the left pixel signal line 5 is connected to the black voltage line 7 or the video signal line 8, and a second switching signal line 10A that supplies a second switching signal VAC_R to a second changeover switch 9A to switch whether the right pixel signal line 6 is connected to the black voltage line 7 or the video signal line 8.

[0060] Thus, the number of selector switches in the display panel controlled by the switching signal VAC may be increased to two, as shown in Figures 10 to 13.

[0061] For example, in the operation for right-hand drive vehicles shown in Figures 10 and 11, in both the wide-angle mode shown in Figure 10 and the narrow-angle mode shown in Figure 11, the switching signal VAC_L is fixed to the video signal line 8, and the second changeover switch 9B controlled by the switching signal VAC_L is always configured to allow the video signal to flow, so that the person in the left seat can always see the image. Then, by switching the switching signal VAC_R between the wide-angle mode and the narrow-angle mode, the person in the right seat can switch between seeing the image and not seeing it. This has the effect of ensuring that the driver maintains their duty to pay attention to the road ahead in vehicles with the steering wheel on the right side.

[0062] In the operation for left-hand drive vehicles shown in Figures 12 and 13, by fixing the switching signal VAC_R to the video signal line 8 and switching the switching signal VAC_L, the person in the right seat can always see the video, while the person in the left seat can switch between seeing and not seeing the video. This has the effect of ensuring that the driver maintains their duty to pay attention to the road ahead in vehicles with the steering wheel on the left side.

[0063] By manufacturing a single type of display device 1B, it can be installed in both right-hand drive and left-hand drive vehicles, and by simply changing the switching signals VAC_L and VAC_R, it can be adapted to both right-hand drive and left-hand drive vehicles. This eliminates the need to manufacture separate display devices for right-hand drive and left-hand drive vehicles, reducing the variety of products related to the display device and lowering the manufacturing cost of the product.

[0064] 〔summary〕 The display devices 1·1A·1B according to Embodiment 1 of this disclosure are display devices 1·1A·1B that present a left image visible from the left side of the display surface and a right image visible from the right side of the display surface, and include a plurality of left pixel rows 2 each containing a plurality of left pixels PL for displaying the left image, a plurality of right pixel rows 3 each containing a plurality of right pixels PR for displaying the right image, a parallax barrier 4 that blocks light from the left pixels toward the right and light from the right pixels toward the left, a left pixel signal line 5 provided for each left pixel row 2 and commonly connected to the plurality of left pixels PL included in the left pixel row 2, and a plurality of right pixels PR provided for each right pixel row 3 and included in the right pixel row 3 The system includes a right pixel signal line 6 that is commonly connected to the left pixels PL or the right pixels PR, a black voltage line 7 that supplies a black voltage BLACK to display a black image on either of the plurality of left pixels PL or the plurality of right pixels PR, a video signal line 8 that supplies video signals SL1, SL2, SL3, and SL4 to display a common image as the left image and the right image on the left pixels PL and the right pixels PR, and a changeover switch 9, 9A, and 9B that switches between a first mode in which only one of the left pixel signal line 5 or the right pixel signal line 6 is connected to the black voltage line 7 and the other of the left pixel signal line 5 or the right pixel signal line 6 is connected to the video signal line 8, and a second mode in which both the left pixel signal line 5 or the right pixel signal line 6 are connected to the video signal line 8.

[0065] According to the above configuration, a dual-view display device can be realized with a simple configuration.

[0066] In the display device 1-1A according to aspect 2 of the present disclosure, in aspect 1, either the left pixel signal line 5 or the right pixel signal line 6 is always connected to the video signal line 8, and the changeover switch 9 switches whether to connect the other of the left pixel signal line 5 or the right pixel signal line 6 to the black voltage line 7 or to the video signal line 8.

[0067] With the above configuration, a black image can be displayed in either the left or right pixel in narrow viewing angle mode.

[0068] The display devices 1, 1A, and 1B according to aspect 3 of the present disclosure preferably further include switching signal lines 10, 10A, and 10B that supply switching signals VAC to the switching switches 9, 9A, and 9B to switch the connection destination of the switching switches 9, 9A, and 9B, as described in aspect 1 or 2 above.

[0069] According to the above configuration, in the first mode, only one of the left pixel signal line or the right pixel signal line can be connected to the black voltage line, and the other of the left pixel signal line or the right pixel signal line can be connected to the video signal line. In the second mode, both the left pixel signal line or the right pixel signal line can be connected to the video signal line.

[0070] The display device 1A according to aspect 4 of the present disclosure preferably comprises a source driver 11 that outputs the video signals SL1 to SL4, and a plurality of pairs of the left pixel row 2 and the right pixel row 3, and further comprises a demultiplexer switch 12 that distributes the video signals SL1 to SL4 output from the source driver 11 to any of the plurality of pairs.

[0071] The above configuration allows for a reduction in the number of output terminals for the source driver.

[0072] The display device 1B according to aspect 5 of the present disclosure preferably comprises a first changeover switch 9A and a second changeover switch 9B as the changeover switch in aspect 1 or 2, wherein the first changeover switch 9A switches whether the left pixel signal line 5 is connected to the black voltage line 7 or the video signal line 8, and the second changeover switch 9B switches whether the right pixel signal line 6 is connected to the black voltage line 7 or the video signal line 8.

[0073] According to the above configuration, a display device can be realized that supports both a wide-angle mode and a narrow-wide-angle mode for left-hand drive vehicles, and a wide-angle mode for right-hand drive vehicles.

[0074] The display device 1B according to aspect 6 of the present disclosure preferably further comprises, in aspect 5 above, a first switching signal line 10A that supplies a first switching signal VAC_R to the first changeover switch 9A for switching whether the left pixel signal line 5 is connected to the black voltage line 7 or the video signal line 8, and a second switching signal line 10B that supplies a second switching signal VAC_L to the second changeover switch 9B for switching whether the right pixel signal line 6 is connected to the black voltage line 7 or the video signal line 8.

[0075] According to the above configuration, in the first mode, only one of the left pixel signal line or the right pixel signal line can be connected to the black voltage line, and the other of the left pixel signal line or the right pixel signal line can be connected to the video signal line. In the second mode, both the left pixel signal line or the right pixel signal line can be connected to the video signal line.

[0076] In the display devices 1, 1A, and 1B according to aspect 7 of the present disclosure, it is preferable that in aspect 1 or 2, the display devices 1, 1A, and 1B include a self-emissive display, and the black voltage BLACK includes a black signal level voltage for a self-emissive element provided in the self-emissive display.

[0077] With the above configuration, the black signal level voltage for the self-emissive element can be used as image data for the black image, eliminating the need to provide an external circuit outside the source driver to generate separate image data for the black image.

[0078] In the display devices 1, 1A, and 1B according to aspect 8 of the present disclosure, it is preferable that in aspect 1 or 2, the display devices 1, 1A, and 1B include a normally black liquid crystal display, and the black voltage includes a voltage at the Vcom potential.

[0079] With the above configuration, the voltage at the Vcom potential can be used as image data for the black image, eliminating the need to provide an external circuit outside the source driver to generate separate image data for the black image.

[0080] This disclosure is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of this disclosure. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment. [Explanation of Symbols]

[0081] 1 Display device 2 Left pixel column 3 Right pixel column 4 Parallax Barrier 5. Left pixel signal line 6 Right pixel signal line 7 Black voltage wire 8. Video signal lines 9. Changeover switch 10 Switching signal lines 11 Source Driver 12 Demultiplexer Switches PL left pixel PR Right Pixel

Claims

1. A display device that presents a left image visible from the left side of the display surface, and a right image visible from the right side of the display surface, A plurality of left pixel sequences, each containing a plurality of left pixels that display the aforementioned left image, A plurality of right pixel sequences, each containing a plurality of right pixels that display the aforementioned right image, A parallax barrier that blocks light traveling from the left pixel towards the right and light traveling from the right pixel towards the left, A left pixel signal line is provided for each left pixel column and is commonly connected to the plurality of left pixels included in the left pixel column, A right pixel signal line is provided for each of the right pixel rows and is commonly connected to the plurality of right pixels included in the right pixel row, A black voltage line that supplies a black voltage to display a black image in either the plurality of left pixels or the plurality of right pixels, A video signal line that supplies a video signal to the left pixel and the right pixel to display a common image as the left image and the right image, A display device comprising a toggle switch that switches between a first mode in which only one of the left pixel signal line or the right pixel signal line is connected to the black voltage line and the other of the left pixel signal line or the right pixel signal line is connected to the video signal line, and a second mode in which both the left pixel signal line or the right pixel signal line are connected to the video signal line.

2. Either the left pixel signal line or the right pixel signal line is always connected to the video signal line. The display device according to claim 1, wherein the changeover switch switches whether the other of the left pixel signal line or the right pixel signal line is connected to the black voltage line or to the video signal line.

3. The display device according to claim 1 or 2, further comprising a switching signal line that supplies a switching signal to the switching switch for switching the connection destination by the switching switch.

4. It includes a source driver that outputs the aforementioned video signal, The system comprises multiple sets of the aforementioned left pixel column and the aforementioned right pixel column, The display device according to claim 1 or 2, further comprising a demultiplexer switch for distributing the video signal output from the source driver to any of the plurality of sets.

5. The aforementioned changeover switch comprises a first changeover switch and a second changeover switch. The first changeover switch switches whether the left pixel signal line is connected to the black voltage line or the video signal line. The display device according to claim 1 or 2, wherein the second changeover switch switches whether the right pixel signal line is connected to the black voltage line or the video signal line.

6. A first switching signal line supplies a first switching signal to the first switching switch that switches whether the left pixel signal line is connected to the black voltage line or the video signal line, The display device according to claim 5, further comprising: a second switching signal line that supplies a second switching signal to a second switching switch for switching whether the right pixel signal line is connected to the black voltage line or the video signal line.

7. The display device includes a self-emissive display, The display device according to claim 1 or 2, wherein the black voltage includes the voltage of the black signal level for a self-emissive element provided in the self-emissive display.

8. The display device includes a normally black liquid crystal display, The display device according to claim 1 or 2, wherein the black voltage includes a voltage at the Vcom potential.

Images