JP2006243741A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device by which difficulty in observation by a ghost is relieved regardless of an observation position to obtain successful and high-definition video display when observers of the display device exist only in one direction or only one video image is required. <P>SOLUTION: The display device has a display part 325 capable of displaying individual video images in two visual directions of a driver's seat and a passenger seat on one screen and a mode switching means 348 capable of selecting a first display mode for displaying the video image in both the visual directions and a second display mode for displaying the video image in one visual direction and displaying a single color in the other visual direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a display device that can provide different information that is independent of each other to a plurality of users on a single screen substantially simultaneously.

The main display development so far is to enable the viewer to see the same good image quality regardless of the viewing direction from the viewer, or to allow multiple viewers to obtain the same information at the same time. Has been optimized for. However, there are many applications where it is desirable for individual viewers to be able to see different information from the same display. For example, in a car, a driver may want to see satellite navigation data, and a passenger in the next seat may want to see video from an in-vehicle DVD or a TV tuner. When two displays are used in such an example, there is a problem that an extra space is taken and the cost is increased.

  Therefore, in recent years, as shown in the following Patent Document 1 and Patent Document 2, two screens can be displayed simultaneously on a single liquid crystal display, for example, a display capable of viewing different screens from a driver seat and a passenger seat. An apparatus is disclosed. Further, as shown in Patent Documents 3 and 4 below, a two-screen display device capable of simultaneously displaying two types of images on the same screen is disclosed.

JP-A-6-186526 JP 2000-137443 A Japanese Patent Laid-Open No. 11-331876 Japanese Patent Application Laid-Open No. 09-46622 JP 2004-206089 A

  However, when the above-described multi-view display device displays images with different viewing directions at the same time, the distance and angle from the display device are within a predetermined range so that one observer can clearly see only one image. It is necessary to observe from the area that enters, but because the range is narrow, when observing from a slightly different area, a part of the other image appears to overlap with one image, so-called double image is generated was there. In particular, even when there is only one viewer, if two different images are displayed, a double image is generated, and the observation position of the image is specified within a very narrow range. It was very inconvenient for the observer.

  In view of the above-described problems, the object of the present invention is when the observer of the display device exists only in one direction, or when only one image is required, regardless of the observation position. The object is to provide a display device capable of reducing the unpleasantness of viewing by a double image and obtaining a good and high-quality image display.

In order to achieve the above-mentioned object, the first characteristic configuration of the display device according to the present invention includes a display unit capable of displaying individual images for two viewing directions on the driver's seat side and the passenger seat side on the same screen, and a specific Control means for controlling the display of video for one viewing direction, the control means for the other viewing direction according to the type of video source to be displayed for one viewing direction The display control of the video source to be displayed is performed .

  The second feature configuration is a display unit capable of displaying individual images for two viewing directions on the driver's seat side and the passenger's seat side on the same screen, and a control for displaying a video source for a specific viewing direction in a single color. And the control means sets the video source displayed in the other viewing direction to a single color according to the type of the video source displayed in the one viewing direction. is there.

  The third feature configuration includes a display unit capable of displaying on the same screen individual images for two viewing directions on the driver's seat side and the passenger seat side, and a control means for turning off the image for a specific viewing direction. In the display device, the control unit is configured to turn off the video source displayed in the other viewing direction according to the type of the video source displayed in the one viewing direction.

  The fourth characteristic configuration includes a display unit capable of displaying individual images for two viewing directions on the driver's seat side and the passenger seat side on the same screen, and a control means for controlling display of the images for a specific viewing direction. In accordance with the type of video source to be displayed with respect to one viewing direction, the control means causes a video source to be displayed with respect to the other viewing direction to be displayed in the one viewing direction. On the other hand, the video signal is substantially the same as the video source to be displayed.

  The fifth characteristic configuration includes a display unit capable of displaying individual images for two viewing directions on the driver's seat side and the passenger's seat side on the same screen, and a control means for controlling display of images for a specific viewing direction. A display device comprising: means for setting a priority between the individual videos for each viewing direction; and the control means is configured so that the priority of the video source to be displayed for one viewing direction is the other. When the priority order of the video source to be displayed with respect to the viewing direction is higher, the display control of the video source to be displayed with respect to the other viewing direction is performed.

  The sixth feature configuration is a display unit that can display individual images for two viewing directions on the driver's side and passenger's side on the same screen, and a control that displays a video source for a specific viewing direction in a single color. A display device comprising: means for setting priority between the individual videos for each viewing direction; and the control means has a priority of video sources to be displayed for one viewing direction. When the priority order of the video source to be displayed with respect to the other viewing direction is higher, the video source to be displayed with respect to the other viewing direction has a single color.

  The seventh characteristic configuration includes a display unit capable of displaying on the same screen separate images for two viewing directions on the driver's seat side and the passenger seat side, and a control means for turning off the image for a specific viewing direction. A display device comprising: means for setting priorities between the individual videos for each viewing direction; and the control means is configured such that the priority of the video source to be displayed for one viewing direction is the other viewing direction. Is higher than the priority of the video source to be displayed, the video source to be displayed with respect to the other viewing direction is turned off.

  The eighth characteristic configuration includes a display unit capable of displaying on the same screen individual images for two viewing directions on the driver's seat side and the passenger seat side, and a control means for controlling display of the images for a specific viewing direction. A display device comprising: means for setting a priority between the individual videos for each viewing direction; and the control means is configured so that the priority of the video source to be displayed for one viewing direction is the other. The video source displayed for the other viewing direction is substantially the same as the video source displayed for the one viewing direction when the priority is higher than the priority of the video source displayed for the viewing direction. It is in the point to be a signal.

  The ninth characteristic configuration includes a display unit capable of displaying on the same screen individual images for two viewing directions on the driver's seat side and the passenger's seat side, and a control means for controlling display of the images for a specific viewing direction. And a means for setting a priority order between the individual videos for each viewing direction, and the control means performs display control for a video source having a low priority order.

  The tenth characteristic configuration includes a display unit capable of displaying individual images for two viewing directions on the driver's seat side and the passenger seat side on the same screen, and a control means for displaying the images for a specific viewing direction in a single color. And a means for setting a priority between the individual images for each viewing direction, and the control means is to make a video source with a low priority a single color.

  The eleventh characteristic configuration includes a display unit capable of displaying on the same screen individual images for two viewing directions on the driver's seat side and the passenger seat side, and a control means for turning off the image for a specific viewing direction. The display device includes a means for setting a priority between the individual videos for each viewing direction, and the control means is for turning off a video source having a low priority.

  The twelfth characteristic configuration includes a display unit capable of displaying on the same screen individual images for two viewing directions on the driver's seat side and the passenger's seat side, and control means for controlling display of the images for a specific viewing direction A display device comprising: means for setting a priority between the individual videos for each viewing direction; and the control means substantially converts a video source with a low priority to a video source with a high priority. In other words, the video signals are the same.

  As described above, according to the present invention, when the observer of the display device exists only in one direction, or when only one image is required, it is possible to double the observation position regardless of the observation position. It has become possible to provide a display device that can reduce the difficulty of viewing images and obtain a good and high-quality image display.

  Hereinafter, a basic embodiment of a display device embodying the present invention will be described with reference to the drawings. However, the technical scope of the present invention is not limited to the embodiments described below, but extends to the invention described in the claims and equivalents thereof.

  FIG. 1 is a conceptual diagram of a multi-view display device (hereinafter simply referred to as “display device”) according to the present invention. In the figure, 1 is the first video source, 2 is the second video source, 3 is the first video data from the first video source, 4 is the second video data from the second video source, 5 Is display control means, 6 is display data, 7 is a display unit (for example, a liquid crystal panel), 8 is a first display image based on the first video source 1, and 9 is a second display based on the second video source 2. The display image 10 is an observer (user) located on the left side of the display unit 7, and 11 is an observer (user) located on the right side of the display unit 7.

  The conceptual diagram of FIG. 1 shows that the observer 10 observes the first display image 8 according to the relative positions of the observers 10 and 11 with respect to the display unit 7, in other words, according to the viewing angle with respect to the display unit 7. The person 11 can conceptually show that the second display image 9 can be viewed substantially simultaneously, and that each display image 8, 9 can be viewed over the entire display surface of the display unit 7. . In FIG. 1, a first video source 1 is a movie image of a DVD player or a received image of a television receiver, for example, and a second video source 2 is a map or route guidance image of a car navigation device, for example. The first video data 3 and the second video data 4 are supplied to the display control means 5 and processed so that they can be displayed substantially simultaneously on the display unit 7.

  The display unit 7 to which the display data 6 is supplied from the display control means 5 is composed of a liquid crystal panel provided with a parallax barrier described later. Half of the total number of pixels in the horizontal direction of the display unit 7 is displayed on the first display image 8 based on the first video source 1, and the other half of the pixels is the second display image 9 based on the second video source 2. Used for display. The observer 10 located on the left side with respect to the display unit 7 can see only the pixels corresponding to the first display image 8, and the second display image 9 is displayed by the parallax barrier formed on the surface of the display unit 7. It is blocked and is virtually invisible. On the other hand, the observer 11 located on the right side of the display unit 7 can see only the pixels corresponding to the second display image 9, and the first display image 8 is substantially invisible due to being blocked by the parallax barrier. . As the parallax barrier, for example, the configurations disclosed in JP-A-10-123461 and JP-A-11-84131 can be applied.

  With such a configuration, different information and content can be provided to the left and right users on a single screen. Of course, if the first and second video sources are the same, the left and right users can view the same image as before.

  FIG. 2 is a perspective view showing an example of mounting the display device according to the present invention on a vehicle. In the figure, 12 is a passenger seat, 13 is a driver's seat, 14 is a windshield, 15 is an operation unit, and 16 is a speaker.

  The display unit 7 of the display device of FIG. 1 is disposed in the dashboard portion at the substantially center between the driver's seat 13 and the passenger seat 12, for example, as shown in FIG. 2. Various operations on the display device are performed by operating a touch panel (not shown) or the operation unit 15 formed integrally on the surface of the display unit 7 or an infrared or wireless remote controller (not shown). A speaker 16 is disposed at each door of the vehicle, and sounds, warning sounds and the like linked to the display image are output.

  The observer 11 shown in FIG. 1 sits in the driver seat 13 and the observer 10 sits in the passenger seat 12. The image that can be viewed from the first viewing direction (driver's seat side) with respect to the display unit 7 is, for example, an image such as a map of a car navigation device, and can be viewed from the second viewing direction (passenger seat side) substantially simultaneously. The image is, for example, a television reception image or a DVD movie image. Therefore, the passenger in the passenger seat 12 can enjoy television and DVD at the same time that the driver in the driver seat 13 receives driving assistance by car navigation. Moreover, since each image is displayed using, for example, the entire 7-inch screen, the screen size is not reduced as in the conventional multi-window display. In other words, optimal information and content are provided to the driver and passengers as if each had its own dedicated display.

  FIG. 3 is a schematic view of a cross-sectional structure of the display unit 7. In the figure, 100 is a liquid crystal panel, 101 is a backlight, 102 is a polarizing plate disposed on the backlight side of the liquid crystal panel, 103 is a polarizing plate disposed on the front side of the light emitting direction of the liquid crystal panel, and 104 is a TFT (Thin Film Transistor) substrate, 105 a liquid crystal layer, 106 a color filter substrate, 107 a glass substrate, and 108 a parallax barrier. The liquid crystal panel 100 includes a pair of substrates having a liquid crystal layer 105 sandwiched between a TFT substrate 104 and a color filter substrate 106 disposed to face the TFT substrate 104, a parallax barrier 108 disposed on the front surface on the light emitting direction side, and a glass substrate. 107 is sandwiched between two polarizing plates 102 and 103, and is disposed slightly apart from the backlight 101. In addition, the liquid crystal panel 100 includes pixels composed of RGB colors (three primary colors).

  Each pixel of the liquid crystal panel 100 is separately controlled for left side (passenger seat side) display and right side (driver seat side) display. The display pixel on the left side (passenger seat side) is blocked from being displayed on the right side (driver seat side) by the parallax barrier 108 and is visible from the left side (passenger seat side). Further, the display pixel on the right side (driver's seat side) is blocked from being displayed on the left side (passenger seat side) by the parallax barrier 108 and is visible from the right side (driver's seat side). This makes it possible to provide different displays for the driver and passengers. In other words, navigation map information can be given to the driver, and at the same time, a DVD movie or the like can be shown to the passenger. Note that if the configuration of each pixel of the parallax barrier 108 and the liquid crystal panel is changed, a configuration in which different images are displayed in a plurality of directions such as three directions is also possible. Further, the viewing angle may be varied by configuring the parallax barrier itself with a liquid crystal shutter or the like that can be electrically driven.

  FIG. 4 is a schematic view of the structure of the display panel viewed from the front, and FIG. 3 is a cross section taken along the line AA ′ in FIG. In the figure, 109 is a pixel for left side (passenger seat side) display, and 110 is a pixel for right side (driver's seat side) display. 3 and 4 show a part of the liquid crystal panel 100 in which, for example, 800 pixels are arranged in the horizontal direction and 480 pixels are arranged in the vertical direction. The left (passenger side) display pixel 109 and the right (driver's side) display pixel 110 are grouped in the vertical direction and are arranged alternately. The parallax barriers 108 are arranged at intervals in the horizontal direction and are uniform in the vertical direction. Thus, when the display panel is viewed from the left side, the parallax barrier 108 covers the right pixel 110 and the left pixel 109 is visible. Similarly, when viewed from the right side, the parallax barrier 108 covers the left pixel 109 and the right pixel 110 can be seen. Further, in the vicinity of the front, since both the left pixel 109 and the right pixel 110 are visible, the left display image and the right display image appear to substantially overlap. Here, the left side pixels 109 and the right side pixels 110 alternately arranged in FIG. 4 have RGB colors as shown in FIG. 3, but in each group in the vertical direction, R columns, G columns, B It may be configured by a single color like a column, or may be configured as a column in which a plurality of RGB are mixed.

  Specifically, for example, in order to display different images in the two directions of the right side (driver's seat side) and the left side (passenger seat side) on the display unit 7, source signals corresponding to the respective images are configured. By compressing 800 × 480 pixels to 400 × 480 pixels, the image signal can be combined with a video signal corresponding to 800 × 480, which is the number of pixels of the display unit 7. At this time, as shown in FIG. 10, for the source signal on the driver's seat side, the odd-numbered pixels are thinned out of the source signal to be originally displayed, and for the passenger-side source signal, the even-numbered pixels are A thinning configuration can be adopted. However, the thinning method is not limited to this, and thinning processing may be performed in odd-numbered columns and even-numbered columns for each element of R, G, and B constituting one pixel. The final video source is generated by synthesizing the video sources compressed by the thinning process so that the columns are alternated.

  When the image displayed on the display unit in this way is viewed from the right side (driver's seat side), for example, depending on the observation position of the driver shown in FIG. 1, it should be covered by the parallax barrier 108 shown in FIG. The image of the pixel 109 for the left side may slightly leak from the parallax barrier 108. Similarly, when viewed from the left side (passenger seat side), depending on the observation position of the passenger, the image for the right side should be covered by the parallax barrier 108 The image of the pixel 110 may leak slightly from the parallax barrier 108. In preparation for such a case, for example, control means for adjusting and displaying the video displayed on the left side (passenger seat side) so as to improve the video quality of the video displayed on the right side (driver's seat side) (FIG. 6).

  FIG. 5 is a circuit diagram showing an outline of the TFT substrate 104. Reference numeral 111 denotes a display panel driving unit, 112 denotes a scanning line driving circuit, 113 denotes a data line driving circuit, 114 denotes a TFT element, 115 to 118 denote data lines, 119 to 121 denote scanning lines, 122 denotes a pixel electrode, and 123 denotes a sub pixel. is there.

  As shown in FIG. 5, a plurality of subpixels 123 are formed with a region surrounded by the data lines 115 to 118 and the scanning lines 119 to 121 as one unit. In each subpixel, a pixel electrode 122 for applying a voltage to the liquid crystal layer 105 and a TFT element 114 for controlling the switching are formed. The display panel driving unit 111 controls the driving timing of the scanning line driving circuit 112 and the data line driving circuit 113. The scanning line driving circuit 112 performs selective scanning of the TFT element 114, and the data line driving circuit 113 controls the voltage applied to the pixel electrode 122.

  The plurality of subpixels may include first pixel data (for example, data lines 115 and 117) based on synthesized data of first image data and second image data, or first and second individual image data. By transmitting the second pixel data (for right image display) to the data lines 116 and 118, the first image data group for displaying the first image and the second image are displayed. A second image data group to be displayed is formed.

  FIG. 6 is a block diagram showing an outline of a display device according to the present invention, which is an application example to a so-called Audio Visual Navigation multifunction peripheral. In the figure, 124 is a touch panel, 200 is a control means, 201 is a CD / MD playback unit, 202 is a radio reception unit, 203 is a TV reception unit, 204 is DVD playback, 205 is an HD (Hard Disk) playback unit, and 206 is navigation. 207 is a distribution circuit, 208 is a first image adjustment circuit, 209 is a second image adjustment circuit, 210 is an audio adjustment circuit, 211 is an image output unit, 212 is a VICS information reception unit, and 213 is a GPS information reception unit. , 214 is a selector, 215 is an operation unit, 216 is a remote control transmission / reception unit, 217 is a remote control, 218 is a memory, 219 is an external audio / video input unit, 220 is a camera, 221 is brightness detection means, 222 is occupant detection means, 223 is a rear display unit, 224 is an ETC vehicle-mounted device, and 225 is a communication unit.

  The display unit 7 includes a touch panel 124, a liquid crystal panel 100, and a backlight 101. As described above, the liquid crystal panel 100 of the display unit 7 substantially includes an image viewed from the driver's seat side as the first viewing direction and an image viewed from the passenger seat side as the second viewing direction. It is possible to display at the same time. The display unit 7 may be a flat panel display other than a liquid crystal panel, such as an organic EL display panel, a plasma display panel, a cold cathode flat panel display, or the like.

  The control unit 200 receives images and sounds from various sources (CD / MD playback unit 201, radio reception unit 202, TV reception unit 203, DVD playback unit 204, HD playback unit 205, and navigation unit 206) from the control unit 200. The first image adjustment circuit 208 and the second image are distributed through the distribution circuit 207 that distributes the video source designated for left to 208 and the source designated for right to 209 based on the instruction of If the sound is a sound, it is distributed to the sound adjusting circuit 210 to the adjusting circuit 209. The first and second image adjustment circuits 208 and 209 adjust the brightness, color tone, contrast, and the like, and display the adjusted images on the display unit 7 in the image output unit 211. The sound adjustment circuit 210 adjusts the distribution, volume, and sound to each speaker, and the adjusted sound is output from the speaker 16.

  The control unit 200 adjusts the left image so that the right image quality is improved, for example, when the left image leaks from the parallax barrier and becomes a double image in the image from the right side (driver's seat side). To do. As a specific example, the distribution circuit 207 is switched so that the first video source corresponding to the left side (passenger seat side) becomes the same source signal as the second video source corresponding to the right side (driver seat side). Can be controlled. In this case, as shown in FIG. 11, the video from the right side (driver's seat side) is displayed as the video itself corresponding to the second video source, so that the image quality is improved. As another specific example, the first video source corresponding to the left side (passenger seat side) can be blocked, and the first image adjustment circuit 208 can be controlled to generate a single color video signal. In this case, the left image leaking from the parallax barrier becomes a single color, so the image from the left side (passenger seat side) becomes static, and the brightness and color vary with respect to the image displayed on the right side. Since the influence of flickering and the like can be eliminated, the quality of the video displayed on the right side is improved.

  FIG. 7 is a block diagram showing an outline of the image output unit 211. In the figure, 226 is a first writing circuit, 227 is a second writing circuit, and 228 is a VRAM (Video RAM).

  As shown in FIG. 7, for example, the image output unit 211 includes a first writing circuit 226, a second writing circuit 227, a VRAM (Video RAM) 228, and a display panel driving unit 111. For example, the first writing circuit 226 outputs image data corresponding to an odd-numbered column of images output from 208 of the adjusted image data (that is, image data for the first display image 8 in FIG. 1). The second writing circuit 227 is based on the image data corresponding to the even-numbered columns output from the 209 (that is, the image data for the second display image 9 in FIG. 1), and in each corresponding area in the VRAM 228. Write. The display panel driving unit 111 is a circuit that drives the liquid crystal panel 100, and is based on the image data (the combined data of the first image data and the second image data) held in the VRAM 228. The corresponding pixel is driven. Since the image data is written in the VRAM 228 so as to correspond to the multi-view display image obtained by combining the first image data and the second image data, only one drive circuit is required. The operation is also the same as that of a driving circuit of a normal liquid crystal display device. As another configuration, the first display panel driving circuit and the first display panel driving circuit for driving the corresponding pixels of the liquid crystal display panel based on the respective image data without combining the first image data and the second image data. It is also conceivable to use two display panel drive circuits.

  Here, an example of various sources shown in FIG. 6 will be described. When the HD playback unit 205 is selected, music data such as an MP3 file stored in the hard disk (HD), image data such as a JPEG file, and navigation data are stored. The map data and the like are read out, and menu display and image data for selecting music data can be displayed on the display unit 7.

  The navigation unit 206 includes a map information storage unit that stores map information used for navigation, obtains information from the VICS information reception unit 212 and the GPS information reception unit 213, and creates an image for the navigation operation. Can be displayed. The TV receiving unit 203 receives an analog TV broadcast wave and a digital TV broadcast wave from the antenna via the selector 214.

  FIG. 8 is a block diagram showing an outline of the control means 200. In the figure, 229 is an interface, 230 is a CPU, 231 is a storage unit, and 232 is a data storage unit.

  The control unit 200 controls the distribution circuit 207 and various sources, and displays the selected two sources or one source. The control means 200 also displays an operation menu display for controlling these various sources on the display unit 7. Here, as shown in FIG. 8, the control means 200 is configured by a microprocessor or the like, and includes a CPU 230 that comprehensively controls each unit and each circuit in the display device via an interface 229. The CPU 230 is provided with a program storage unit 231 including a ROM that stores various programs necessary for the operation of the display device, and a data storage unit 232 including a RAM that stores various data. Note that the ROM, the RAM, and the like can be used either those built in the CPU or those provided externally. The ROM may be an electrically rewritable nonvolatile memory such as a flash memory.

  The user controls the above-described various sources by using the operation unit 215 to perform an input operation or selection operation such as voice recognition or a switch provided around the touch panel 124 attached to the surface of the display unit 7 or the display unit 7. be able to. Further, an input or selection operation may be performed by the remote control 217 via the remote control transmission / reception unit 216. The control unit 200 performs control including various sources in accordance with the operation of the touch panel 124 and the operation unit 215. Further, the control means 200 is configured to be able to control each volume of the speakers 16 provided in the vehicle as shown in FIG. The control unit 200 also stores various setting information such as image quality setting information, programs, and vehicle information in the memory 218.

  FIG. 9 is a block diagram showing an outline of the memory 218. In the figure, reference numeral 233 denotes a first screen RAM, 234 denotes a second screen RAM 234, 235 denotes image quality setting information storage means, and 236 denotes an environment adjustment value holding means.

  For example, as shown in FIG. 9, the memory 218 includes a first screen RAM 233 and a second screen RAM 234 in which adjustment values of the image quality of the first image and the second image set by the user can be written. Also, image quality setting information storage means 235 in which a plurality of image quality adjustment values are stored in advance for each image quality adjustment as preset values that can be read out when adjusting the image quality of the first image and the second image. Have. Furthermore, in order to adjust the image quality according to changes in the surrounding environment such as the brightness change outside the vehicle, there is provided an environmental adjustment value holding means 236 that holds adjustment values of the image quality of the first video and the second video with respect to the surrounding environment. is doing. Here, the image quality setting information storage unit 235 and the environmental adjustment value holding unit 236 are configured by an electrically rewritable nonvolatile memory such as a flash memory or a battery-backed volatile memory.

  For example, an image from the rear monitoring camera 220 connected to the external audio / image input unit 219 may be displayed on the display unit 7. In addition to the rear monitoring camera 220, a video camera, a game machine, and the like may be connected to the external audio / image input unit 219.

  The control unit 200 is based on information detected by the brightness detection unit 221 (for example, a vehicle light switch or light sensor) or the occupant detection unit 222 (for example, a pressure sensor provided in a driver seat or a passenger seat). It is possible to change settings such as the sound localization position.

  Reference numeral 223 denotes a rear display unit provided for the rear seat of the vehicle, which is the same as the image displayed on the display unit 7 via the image output unit 211, or an image for the driver's seat or the image for the passenger seat. One can be displayed.

  The control means 200 displays the charge display etc. from the ETC onboard equipment 250. FIG. Further, the control means 200 may control the communication unit 225 for wireless connection with a mobile phone or the like, and display related thereto.

  Furthermore, a specific example of the display control device according to the present invention will be described by taking a multi-view display device mounted on a vehicle as an example. As shown in FIG. 12, a navigation device N for guiding a vehicle to a destination, a radio wave receiving device 302 for receiving terrestrial digital broadcasting, and display images by the navigation device N and the radio wave receiving device 302 can be displayed simultaneously. A multi-view display unit 325, a display control device 340 that controls the display of the multi-view display unit 325, a security imaging device 330, and the like are mounted on the vehicle. The multi-view display unit 325 and the display control device 340 constitute a display device.

The navigation device N includes a map data storage unit 305 that stores road map data, a GPS receiving unit 306 that recognizes position information of the host vehicle, a GPS antenna 306a, and an autonomous navigation unit 307 that manages the traveling state of the host vehicle. A route search means 308 for searching for a route to the destination specified based on the map data, a travel state display processing means 309 for displaying the travel position of the vehicle on the map, and various operation modes and conditions. It is configured to include an operation unit 326 and the like, and is configured so that each block is controlled by including a single or a plurality of CPUs, a ROM storing operation programs thereof, and a RAM used for a working area. It has a navigation function that guides the vehicle to a designated point.

  The radio wave receiving apparatus 302 extracts a digital signal from the received signal selected from the received antenna 320, a tuner 321 that selects a transmission channel (frequency band) received via the receiving antenna 320, and error correction. An OFDM demodulator 322 that performs processing and outputs a TS (transport stream) packet; decodes an audio signal from the video / audio packet in the TS packet and outputs the decoded signal to the speaker 324; and decodes the video signal and displays a display unit 325 It is composed of a digital television receiver provided with a decoder 323 for outputting to the receiver.

A plurality of the image pickup devices 330 are arranged in the vehicle, and the image pickup devices 330b and 330c arranged outside the vehicle can be used for a back monitor or an inter-vehicle distance measurement. The image pickup device 330a installed in the vehicle compartment is used for security such as crime prevention, and is arranged at a position where the passenger seat can be observed, and also functions as a viewer detection sensor, an illuminance detection sensor, and a color detection sensor.

  As shown in FIG. 13, the multi-view display unit 25 includes two pairs of substrates each having a liquid crystal layer 913 sandwiched between a TFT substrate 912 on which a TFT array 916 is formed and a counter substrate 914 arranged to face the TFT substrate 912. A liquid crystal panel arranged between the polarizing plates 911 and a parallax barrier substrate 917 on which a parallax barrier layer 915 having a microlens and a light-shielding slit is formed are integrally formed.

  As shown in FIG. 14, the TFT array 916 includes a plurality of pixels each having a region surrounded by the data lines 925 and the scanning lines 924, and each pixel applies a voltage to the liquid crystal layer 913. An electrode 923 and a TFT element 922 that controls switching of the electrode 923 are formed. The scanning line driving circuit 921 performs selective scanning of the TFT element 922, and the data line driving circuit 920 controls the voltage applied to the pixel electrode 923. The display panel driver 926 controls drive timing of the scan line driver circuit 921 and the data line driver circuit 920.

  The plurality of pixels are formed of two pixel groups, a first pixel group and a second pixel group, which are arranged in one row (one data line) (classified as an odd column and an even column), each of which is a source Are driven separately based on different video signals. The light that has passed through the two pixel groups is guided in different directions by the parallax barrier layer 915, or the light in a specific direction is shielded, so that it differs in different directions only in the vicinity of the display surface 918 in space. It is possible to display video. Note that the two pixel groups are not limited to being arranged in every other row, but may be distributed in the screen.

  The multi-view display unit 325 is installed on the front panel in the center of the driver's seat and the passenger seat, and can display the images observed from the driver seat side and the images observed from the passenger seat side differently. It has a configuration. For example, video information from the radio wave receiving device 2 is observed on the passenger seat side, while it can be used as a display of the navigation device N on the driver seat side.

  As shown in FIG. 12, the display control device 340 includes a data recording unit 341 in which shooting data including the vicinity of the passenger seat by the image sensor 330a is recorded, an installation environment of the multi-view display unit 325, and presence / absence of viewers. An image analysis unit 342 for analyzing the video signal, a video signal conversion processing unit 346 for converting and generating a video signal for driving each pixel group of the multi-view display unit 325, and a video for selecting an appropriate source signal from a plurality of source signals A signal selection / output unit 347, an operation unit 348 for specifying a source signal selected by the video signal selection / output unit 347 and functioning as a mode switching unit to be described later, a conversion function recording unit 349, and the like are provided. .

  The image analysis unit 342 analyzes the image data stored in the data recording unit 341, and calculates illuminance detection means 343 for indoor brightness, and color detection means 344 for calculating indoor colors (interior, etc.). And a viewer detection means 345 for determining whether a viewer is in the passenger seat.

  The operation unit 348 displays a guidance display from the navigation device N and a television image received by the radio wave reception device 302 for each of the two images that the driver or passenger can display on the multi-view display unit 325. Or an operation panel for selecting content to be displayed, such as an image display from an image sensor for a back monitor, and the video signal selection output means 47 selects a video signal based on the selected content and The data is output to the view display unit 325.

  When the video signal conversion processing unit 346 wants to improve only the display quality (display performance) of one of the two videos that can be displayed on the multi-view display unit 325, the conversion function The video signal is adjusted based on the conversion function stored in the recording means 349.

  The double image generated due to the dual view display is generated because two different image displays cannot be completely separated. That is, the image display for the other pixel group is displayed so as to be recognized slightly overlapped on the image display for the one pixel group. Sensory evaluation is performed to analyze this situation, and the results are obtained as follows.

FIG. 15 shows the results of evaluating changes in the appearance of a double image when various different images are displayed on two pixel groups. As for the evaluation points in the figure, the average of each evaluator was calculated by adding 0 points when a plurality of arbitrary evaluators each had a remarkable double image and 1 points when the double image was improved. Is.

  FIG. 15A shows the ratio of the average in-plane luminance of the image for one pixel group to the average in-plane luminance of the image for the other pixel group (“in-plane average luminance of the video on one side” / “other This is the result of evaluation using the in-plane average brightness of the video on the side of “)” as a parameter. Since the in-plane average brightness is difficult to directly measure images in two directions using a luminance meter under the same conditions due to the characteristics of the multi-view display unit 325, the pixels that display the images in two directions, respectively. This is done by calculating the ratio of the average values of the input signals (luminance data signals) to the group. The higher the in-plane average brightness of the image on one side, that is, the higher the in-plane average brightness of the image on one side is, and the lower in-plane average brightness of the image on the other side, the better the dual image is . Ultimately, a result is obtained in which the other in-plane average brightness is 0, that is, the display is completely improved when displaying black. However, as an example in which the in-plane average brightness of the image on one side is high and the in-plane average brightness of the image on the other side is low, except for the case where the image on the other side is displayed in black, the image on the other side is simply If it is one color, an improvement effect can be obtained. For example, even when it is displayed in blue, a sufficient improvement effect can be obtained.

  FIG. 15B shows the difference between the display contents of the image for one pixel group and the image for the other pixel group, that is, the similarity of the images (1.0 when the images are completely matched) as a parameter. It is the result of having performed evaluation. The similarity of the image is determined based on the individual input signal of the pixel group (first pixel group) for displaying the image on one side and the pixel group (second image) for displaying the image on the other side corresponding to the display pixel position. The value obtained by taking the ratio of the display pixel position of the pixel group) and the input signal and calculating the average between all the two pixel groups, and when the degree of coincidence of the signals is large (when the images match) The result that the double image is improved is obtained.

  FIG. 15C shows the result of evaluation using the in-plane average chromaticity as a parameter. As for the in-plane average chromaticity, similar to the above-described evaluation result, the result that the double image is improved as the degree of coincidence between the images in the two directions increases.

FIG. 16 shows the result of evaluating the relationship between the surrounding environment and its display quality (easy visibility), focusing on only one video display. Here, since only one video display is focused, the other video display is evaluated under the condition that the above-described double video does not occur, and here the black state is evaluated. Moreover, the evaluation method is also performed by the same evaluation score method by a plurality of arbitrary evaluators as described above.

  FIG. 16A shows the result of evaluating the visibility of video display with respect to the relationship with the brightness (maximum luminance) of video display using ambient brightness as a parameter. The brighter the surrounding brightness is, the better the display quality is when the image display brightness is brighter. On the contrary, when the ambient brightness is dark, an evaluation result with better display quality is obtained when the brightness of the video display is reduced.

  FIG. 16B shows the result of evaluating the visibility of video display using surrounding colors as parameters. The closer the surrounding color and the video display color are, the worse the display quality is evaluated, and the better the display quality is, the better the display quality is as the surrounding color and the video display color are complementary.

  Based on the relationship between the two video signals described above or the surrounding environment and display quality, it is possible to improve the display quality of only one of the two videos that can be displayed on the multi-view display unit 325. A conversion function is desired.

  In other words, the video signal conversion processing unit 346 improves the display quality of only the video on one side of the two videos that can be displayed on the multi-view display unit based on the video signal described above or the surrounding environment and the display quality. To make it happen.

  Further, the video signal conversion processing means 346 has functions as several mode switching means for determining whether or not to make the video signal conversion processing function function by operating the operation unit 348. One is a mode in which the video signal conversion processing function is not always functioned, one is a mode in which the video on either side is manually operated by the operator, and one is an automatic assistant. This is a mode in which the presence or absence of a passenger in the seat is judged and the function is automatically switched to improve the display quality of the image on the driver's seat side. The other is whether or not the driver is driving (running). This is a mode in which the function is automatically switched to improve the display quality of the image on the passenger seat side.

  When the viewer is confirmed in both the driver seat and the passenger seat in the mode in which the video signal conversion processing function does not always function, the video signals input to the two pixel groups are not converted by the video signal conversion processing means 346, Normal drive that performs standard multi-view video output in two directions. In other words, the video signal selection output means 347 that controls display in this mode constitutes first drive mode control means that drives the first pixel group and the second pixel group separately based on video signals of different sources. Is done.

  High-definition display control is performed on the video on either side by the operator's manual operation, and high-definition display control is automatically performed on the video on either side when the viewer is not confirmed in either the driver seat or the passenger seat In the video signal conversion processing means 346 and the conversion function recording means 349 that perform the above, the first or second is improved so that the video quality displayed by either the first or second pixel group is improved. Second drive mode control means for driving the pixel group is configured, and mode switching means is configured by the operation unit 348. That is, the control means for adjusting and displaying the video displayed in the other viewing direction so that the video quality of the video displayed in one viewing direction is improved by the second drive mode control means and the mode switching means. Is configured.

  A mode for automatically determining the presence or absence of a passenger in the passenger seat and automatically switching the function in order to improve the display quality of the image on the driver's seat will be described with reference to the flowchart shown in FIG. The image analysis unit 342 performs image analysis based on the image data in the vicinity of the passenger seat in the room, which is captured by the image sensor 330a (S1) and stored in the data recording unit 341 (S2). When the viewer detection unit 345 determines that there is a passenger in the passenger seat (S3), the video signal of the content selected by the operation unit 348 is selected by the video signal selection unit 47 (S8), The image is output to the display pixel group on the passenger seat side of the multi-view display unit 325, and an image for navigation is output to the display pixel group on the driver seat side (S9).

  In this state, if it is determined by the viewer detection means 345 that there is no passenger in the passenger seat (S3), ambient brightness and color are calculated from the imaging data (S4). When the video signal of the content specified by the operation unit 348 is selected by the video signal selection unit 347 (S5), the video signal conversion processing unit 346 is connected to the video signal displayed on the driver's seat side. The brightness adjustment and color correction of the optimum maximum brightness determined from the environment is performed (S6), and the video signal displayed on the passenger seat is the same as the driver seat side so that the video displayed on the driver seat side does not become a double image. A video signal substantially the same as the video signal is selected (S7) and output to the multi-view display device (S9).

  Here, substantially the same video signal means not only a video signal for driving the other pixel group but also a video signal for driving the other pixel group as well as a video signal for driving the other pixel group. This means that the signal broadly includes a signal generated from the source signal of the video signal that drives one pixel group. In a multi-view display device, when two images are displayed on one screen, data corresponding to twice as many display pixels as usual should be displayed due to the structure. However, in order to display everything, it is necessary to increase the number of pixels correspondingly. However, for that purpose, it is necessary to form high-definition pixels, which is very expensive. Therefore, the resolution of data is reduced to half. For this reason, the same signal as that of one pixel group may be input to the other pixel group, but instead, a full-spec display can be achieved by inputting the thinned video signal. That is, although the video signals are different, the video display is substantially the same.

  Note that the configuration of the viewer detection unit 345 that detects the presence or absence of a viewer in the passenger seat or driver seat is not limited to the image analysis performed by the image sensor 330a and the image analysis unit 342, and is installed in the seat. It is possible to use a known technique such as a pressure sensor or an infrared sensor for detecting a human body. Similarly, the method for detecting the surrounding environment is not limited to image analysis using the image sensor 330a and the image analysis means 342, and can be configured using a known technique such as an illuminometer or a spectrophotometer. is there.

  The operation unit 348 functions in the same procedure as the flowchart described above even in a mode in which it is automatically determined whether or not the driver is driving. However, in this case, it functions to improve the display quality of the image on the passenger seat side. The determination as to whether or not the driver is driving can be detected directly from a speedometer (not shown) or can be detected using other known techniques.

  In the above-described embodiment, the second drive mode control means performs the optimum maximum brightness adjustment and color correction determined from the surrounding environment on the video signal displayed on the driver's seat side, and displays it on the passenger seat. In the video signal described above, the video signal displayed on the driver's seat side is selected to be substantially the same as the video signal for the driver's seat side so that the video displayed on the driver's seat side is not a double image. The display control by is not limited to this, and the following various modes can be adopted as appropriate.

  In other words, the second drive mode control means may be anything that drives the first or second pixel group so that the video quality displayed by one pixel group is improved. The group may be driven to a single color or turned off. In this case, in order to eliminate the inconvenience of a double image, the other pixel group leaking from the periphery of one pixel group becomes static by driving the other pixel group to a single color or turning it off. This eliminates the effect of flickering that changes in brightness and color on the other pixel group, which improves the quality of the image by one pixel group, and turns off the other pixel group to make it black. The contrast with the image displayed on one pixel group stands out, and the quality of the image is further improved.

  Further, the predetermined area of the other pixel group may be driven to the same luminance or a single color or turned off based on the average luminance or hue of the video signal for the predetermined area of one pixel group. In this case, the average of the luminance or hue of the video signal with respect to a predetermined region which is the entire surface or a partial region of one pixel group is obtained, and the predetermined region which is the entire surface or a partial region of the corresponding other pixel group based on the average However, since it is driven to the same luminance or a single color, the quality of the video can be improved in an appropriate state for each region. For example, based on the average of the hues of the predetermined area of one pixel group, the hue of the predetermined area of the other pixel group is displayed in the same hue, or the complementary color thereof, and the luminance of the predetermined area of one pixel group is displayed. Based on the average, control such as lowering the luminance of a predetermined area of the other pixel group improves the image quality by eliminating screen flicker or making contrast more conspicuous.

  Further, the luminance of the video signal for the predetermined region of the other pixel group may be adjusted based on the average luminance of the video signal for the predetermined region of the one pixel group. In this case, the average of the luminance Y or the hue (U, V) of the video signal (for example, YUV signal) with respect to a predetermined region which is the entire surface or a partial region of one pixel group is obtained, and the corresponding other is based on the average. Since the luminance of the video signal with respect to a predetermined region which is the entire surface or a partial region of the pixel group is adjusted, the visibility of the video displayed on one pixel group can be improved. For example, by adjusting the video signal for the other pixel group so as to have an average brightness lower than the obtained average brightness, the contrast can be emphasized and the visibility can be improved.

  Furthermore, the hue of the video signal for the predetermined area of the other pixel group may be adjusted based on the average of the hue of the video signal for the predetermined area of the one pixel group. The so-called dual video described above is generated by recognizing two different video images in a superimposed manner. Therefore, the degree of the double video is reduced by the similarity of the two different video images. For this reason, by adopting the above-described configuration, the image displayed on the other pixel group is adjusted to be similar to the color of the image displayed on the one pixel group, so that the degree of double image Is alleviated.

  Furthermore, it is possible to reduce the problem of the double video by appropriately combining these aspects. Further, in any of the cases described above, video data can be easily obtained by acquiring in advance a conversion function similar to the conversion function as shown in FIG. 15 or FIG. 16 and storing it in the conversion function recording means 349. The conversion process can be performed.

  Regarding the adjustment of the average luminance and the adjustment of the average color described above, the entire screen is set as one area, and the similarity of the image is determined for each pixel and the conversion of the image signal is performed. However, the present invention is not limited to this, and the screen may be divided into several areas, and conversion processing may be performed for each area.

In other words, when adjusting the average luminance in the screen or adjusting the average color in the screen with the entire screen as one region, each pixel is multiplied by the same conversion function, so it is optimally adjusted. Although the ratio of pixels is relatively low, high-quality video display is possible by dividing the screen into several areas.

  In addition, when the conversion processing is performed by determining the similarity for each individual pixel, since the conversion processing uses a different conversion function for each individual pixel, it is necessary to have high processing capability. By dividing the screen into several areas and reducing the amount of conversion processing, the problem of processing capability can be solved.

  In the above-described embodiment, as a control means for displaying an image for a specific viewing direction determined according to a predetermined condition in a single color, either one of the driver seat and the passenger seat is automatically checked when the viewer is not confirmed. Although the high-definition display control is performed for the video on the side, the predetermined condition is defined as the priority set between the individual videos for each viewing direction, and the control means corresponds to the video with a low priority. By displaying the video in the viewing direction in a single color, it is possible to control the video in the viewing direction corresponding to the video with a high priority to be of high quality. For example, if a high priority is set for the guide video between the TV video by the radio wave receiver and the guide video from the navigation device, a single color is displayed instead of the TV video with a low priority, and the guide video Will be displayed in high quality.

  Further, the predetermined condition is defined as a priority set for each viewing direction and a combination of individual images for each viewing direction, and the control means displays a viewing direction image corresponding to a low priority image in a single color. You may comprise so that it may do. For example, when a guidance video from a navigation device is displayed on the driver's seat side and a television image from a radio wave receiver is displayed on the passenger seat side, a combination of displaying a television image on the passenger seat side is displayed on the driver seat side. If the priority order is set higher than the combination for displaying, a single color is displayed on the driver's seat side instead of the guide image so that the television image on the passenger seat side becomes high quality.

  Furthermore, the predetermined condition is defined as a priority set for each viewing direction and a combination of an individual image for each viewing direction and a vehicle state, and the control means simply selects a viewing direction image corresponding to a low priority image. You may comprise so that it may display by one color. For example, when displaying the guidance video from the navigation device on the driver's seat and displaying the guidance video from the navigation device on the passenger seat as well, the combination of displaying the guidance video on the passenger's seat when the vehicle is running is If the priority order is set higher than the combination for displaying the guidance video on the seat side, a single color is displayed on the driver's seat instead of the guidance video so that the guidance video on the passenger seat side becomes high quality. It becomes like this.

  According to the above-described configuration, for example, when the vehicle is in a specific vehicle state such as traveling or stopped, it is possible to improve the quality of a video in a specific viewing direction viewed from a specific viewing direction in the vehicle. In addition, in the above-described case, the attendant effect that the passenger in the passenger seat can safely operate while avoiding the risk of the driver operating the navigation device while traveling is obtained.

  Still further, for example, when displaying a guidance video from the navigation device on the driver's seat and also displaying a guidance video from the navigation device on the passenger seat, a combination of displaying the guidance video on the passenger seat side when the vehicle is traveling If the priority is set lower than the combination that displays the guidance video on the driver's seat during driving, a single color will be used on the passenger side instead of the guidance video so that the guidance video on the driver's seat will be of high quality. It will be displayed.

  In the above-described case, it is possible to display the guidance information of the navigation device required by the driver during traveling with high quality.

  The term “video” defined in the present invention includes both still images and moving images.

Schematic diagram of a display device according to the present invention The perspective view which shows the example of mounting of a display apparatus Schematic of the cross-sectional structure of the display unit Schematic diagram of the structure of the display panel as seen from the front Circuit diagram showing outline of TFT substrate The block diagram which shows the outline of the display apparatus which concerns on this invention The block diagram which shows the outline of the image output part 211 The block diagram which shows the outline of the control means 200 The block diagram which shows the outline of the memory 218 Explanatory drawing which shows the production | generation procedure of the video signal displayed on a display part from a two-system video signal Explanatory drawing which shows the production | generation procedure of the video signal displayed on a display part from a two-system video signal The block block diagram at the time of using the multi view display apparatus controlled by the display control apparatus of this invention for the car navigation mounted in the vehicle Illustration of multi-view display device Illustration of LCD panel Illustration of the evaluation result of the double image Explanatory drawing of visibility evaluation of display device Flowchart of a mode that automatically determines the presence or absence of a passenger in the passenger seat and automatically switches its function to improve the display quality of the driver's side video

Explanation of symbols

1: first video source, 2: second video source, 3: first image data, 4: second image data, 5: display control unit, 6: display data, 7: display unit, 8: First display image, 9: Second display image, 10: Observer, 11: Observer, 12: Passenger seat, 13: Driver's seat, 14: Windshield, 15: Operation unit, 16: Speaker,
100: liquid crystal panel, 101: backlight, 102: polarizing plate, 103: polarizing plate, 104: TFT substrate, 105: liquid crystal layer, 106: color filter substrate, 107: glass substrate, 108: parallax barrier, 109: left side ( (Passenger seat side) display pixel, 110: right side (driver's seat side) display pixel, 111: display panel drive unit,
112: Scan line drive circuit, 113: Data line drive circuit, 114: TFT element, 115-118: Data line, 119-121: Scan line, 122: Pixel electrode, 123: Subpixel, 124: Touch panel, 200: Control 201: CD / MD playback unit 202: Radio reception unit 203: TV reception unit 204: DVD playback unit 205: HD (Hard Disk) playback unit 206: Navigation unit 207: Distribution circuit 208: First image adjustment circuit, 209: Second image adjustment circuit, 210: Audio adjustment circuit, 211: Image output unit, 212: VICS information reception unit, 213: GPS information reception unit, 214: Selector, 215: Operation unit 216: Remote control transmission / reception unit, 217: Remote control, 218: Memory, 219: External audio / video input unit, 220: Camera, 221: Brightness Detecting means, 222: occupant detection means, 223: rear display unit, 224: ETC onboard unit, 225: communication unit, 226: first write circuit,
227: second writing circuit, 228: VRAM (Video RAM), 229: interface, 230: CPU, 231: storage unit, 232: data storage unit, 233: first screen RAM, 234: second screen RAM 234, 235: Image quality setting information storage unit, 236: Environment adjustment value holding unit, 325: Multi-view display unit, 330: Image sensor, 340: Display control device, 341: Data recording unit, 342: Image analysis unit 346: Video signal conversion processing means 347: Video signal selection output means 348: Operation unit 349: Conversion function recording means

Claims (12)

  A display unit that can display individual images for the two viewing directions on the driver's seat and passenger side on the same screen, a first display mode that displays images for both viewing directions, and one viewing direction. On the other hand, a display device comprising mode switching means capable of selecting a second display mode for displaying an image and displaying a single color with respect to the other viewing direction.   A display unit capable of displaying on the same screen separate images for two viewing directions on the driver's seat and passenger's side, and a control means for displaying the image for a specific viewing direction determined according to a predetermined condition in a single color. A display device characterized by that.   A display unit capable of displaying individual images for two viewing directions on the driver's seat side and the passenger's seat side on the same screen, detection means for detecting the viewing status of the individual images, and a detection result according to the detection means A display device comprising control means for displaying an image in a viewing direction that is not viewed in a single color.   A display unit capable of displaying individual images for two viewing directions on the driver's seat side and the passenger's seat side on the same screen, detection means for detecting the viewing status of the individual images, and a detection result according to the detection means A display device comprising: control means for displaying an image for a viewing direction being viewed and displaying a single color for a viewing direction not being viewed.   A display unit capable of displaying individual images for two viewing directions on the driver's seat side and the passenger's seat side on the same screen, detection means for detecting the viewing status of the individual images, and a detection result according to the detection means A display device comprising: control means for switching and displaying a video in a viewing direction that is not viewed to a video in a viewing direction that is being viewed.   The display device according to claim 3, wherein the detection unit detects a viewing state of the individual video based on a detection result of a pressure sensor installed in a seat of the vehicle.   A display unit that can display individual images for the two viewing directions on the driver's seat and passenger side on the same screen, a first display mode that displays images for both viewing directions, and one viewing direction. And a mode switching means capable of selecting a second display mode for displaying an image and turning off the image displayed for the other viewing direction overlapping the image displayed for the one viewing direction. Display device.   A display unit capable of displaying, on the same screen, individual images for two viewing directions on the driver's seat side and the passenger seat side, and a control means for turning off the image for a specific viewing direction determined according to a predetermined condition. Display device.   A display unit capable of displaying individual images for two viewing directions on the driver's seat side and the passenger's seat side on the same screen, detection means for detecting the viewing status of the individual images, and a detection result according to the detection means And a control means for turning off the video for the viewing direction that is not viewed.   A display unit capable of displaying individual images for two viewing directions on the driver's seat side and the passenger's seat side on the same screen, detection means for detecting the viewing status of the individual images, and a detection result according to the detection means A display device comprising: control means for displaying an image for a viewing direction being viewed and turning off the image for a viewing direction not being viewed.   The display device according to claim 9 or 10, wherein the detection unit detects a viewing situation of the individual video based on a detection result of a pressure sensor installed in a seat of a vehicle.   The pixel group constituting the screen is distributed in the first pixel group and the second pixel group, and is driven based on the individual video signals, so that the individual viewing directions for the driver seat side and the passenger seat side can be obtained. Display means capable of displaying the video on the same screen, a first drive mode for driving the first pixel group and the second pixel group based on individual video signals, and the first pixel group or It comprises a mode switching means capable of selecting any one of the second pixel groups based on a video signal and selecting a second drive mode for driving the other pixel group to be turned off. Display device.