JP2008112060A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device which displays an easily visible image in image displaying, without occupying a large space. <P>SOLUTION: The display device displays the image, and is equipped with a display panel and a barrier to be arranged on the front side or on the rear side of the display panel, wherein the display panel is formed by arranging a plurality of image display elements to display the image on the front face and a plurality of first transparent sections to transmit light from the rear face to the front face on the same surface, and the barrier is formed by arranging a plurality of optical elements respectively corresponding one-to-one to the plurality of image display elements, and a plurality of shutter sections respectively corresponding one-to-one to the plurality of transparent sections for respectively transmitting light from the rear face to the front face of the barrier, or interrupting light on the same surface. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a display device capable of displaying an image on a display panel or watermarking behind the display panel.

  FIG. 17 is a schematic view showing a conventional in-vehicle display device. The display device 910 includes a liquid crystal display panel 912 and a half mirror 914, and is attached to the front of the mechanical meter 920 in the vehicle instrument panel.

  In this display device 910, a desired image is displayed on the screen of the liquid crystal display panel 912, so that it is displayed by the liquid crystal display panel 912 on the display of the mechanical meter 920 when viewed from the driver who is the viewer 930. The resulting images will appear to overlap.

  Therefore, by displaying necessary information while the vehicle is traveling on the screen of the liquid crystal display panel 912, the driver who is the viewer 930 simply acquires the information by looking at the mechanical meter 920. be able to.

  In addition, as a thing relevant to this kind of display apparatus, the thing of the following patent document 1 is known, for example.

Japanese Patent Application Laid-Open No. 2004-249753

  However, in the above-described prior art, as shown in FIG. 17, the liquid crystal display panel 912 is arranged so as to be orthogonal to the line connecting the viewer 930 and the mechanical meter 920, and accordingly, the halfway Since the mirror 914 is also inclined by 45 degrees with respect to the line, there is a problem that the depth of the display device 910 itself becomes long and the space occupied by the display device 910 increases.

  Further, since the half mirror 914 is used, when the image is displayed by the liquid crystal display panel 912, the display of the mechanical meter 920 is always visible, so that the viewer 930 can see the displayed image. There was also a problem that it was difficult.

  Accordingly, an object of the present invention is to solve the above-described problems of the prior art and to provide a display device that can display an image in an easy-to-see manner when displaying an image without occupying a large space. .

  In order to achieve at least part of the above object, a first display device of the present invention is a display device capable of displaying an image, the display panel, and the front side or the back side of the display panel. The display panel includes a plurality of image display element units for displaying an image on the front surface of the display panel, and a plurality of image display elements for allowing light to pass from the back surface to the front surface of the display panel. The first transparent portion is arranged on the same surface, and the barrier is configured to allow light to pass through or block the plurality of optical element portions from the back surface to the front surface of the barrier. The gist of the present invention is that a plurality of first shutter portions to be arranged on the same surface.

  As described above, in the first display device, an image can be displayed on the display panel by the plurality of image display element units. Further, when the display device is viewed from the front by passing or blocking light from the back to the front of the barrier by the plurality of first shutter portions, a background (for example, behind the display device) When the display device is positioned in front of the mechanical meter, the display of the mechanical meter) can be seen through or hidden. Furthermore, since the first display device does not use a half mirror, the depth of the display device itself can be shortened, and the space occupied by the display device can be reduced.

  In the first display device of the present invention, it is preferable that each of the optical element portions is a second shutter portion for allowing light to pass through or blocking the light from the back surface to the front surface of the barrier. .

  As described above, the optical element unit is the second shutter unit, and, for example, the display panel can be formed by passing or blocking light from the back surface to the front surface of the barrier corresponding to the image display element unit. When displaying an image on the display device, it is possible to make the image easier to see when the display device is viewed from the front, or to make it easier to see the background behind the display device when the image is not displayed.

  In the first display device of the present invention, each of the optical element portions may be a second transparent portion for allowing light to pass from the back surface to the front surface of the barrier.

  In this way, when displaying an image on the display panel, the image can be easily viewed when the display device is viewed from the front.

  In the first display device of the present invention, the plurality of optical element portions in the barrier correspond to the plurality of image display element portions in the display panel one-on-one, and the plurality of first element in the barrier. It is preferable that the shutter portion corresponds to each of the plurality of first transparent portions in the display panel one to one.

  As described above, since the optical element part and the image display element part have a one-to-one correspondence, it is possible to effectively exchange light between the corresponding optical element part and the image display element part. In addition, since the first shutter portion and the first transparent portion have a one-to-one correspondence, light is effectively exchanged between the corresponding first shutter portion and the first transparent portion. Can do.

  In the first display device of the present invention, the image display element portion and the first transparent portion are alternately arranged in at least one of a horizontal direction and a vertical direction in the display panel, It is preferable that the optical element portion and the first shutter portion are alternately arranged in at least one of a horizontal direction and a vertical direction in the barrier.

  By arranging in this way, when the display device is viewed from the front, the image displayed when the image is displayed and the background behind the display device when the image is not displayed are shown in a balanced manner. Image quality can be improved.

  In the first display device of the present invention, the image display element part and the first transparent part are arranged in a checkered pattern, and the optical element part and the first shutter part are It is preferably arranged so as to have a checkered pattern. The image display element portion and the first transparent portion are arranged in a stripe shape, and the optical element portion and the first shutter portion are arranged in a stripe shape. May be.

  By arranging in this way, when the display device is viewed from the front, the image displayed when the image is displayed and the background behind the display device when the image is not displayed are shown in a more balanced manner. Image quality can be improved.

  In the first display device of the present invention, the display panel includes a plurality of pixels each forming a square, and each pixel includes at least three image display element units for displaying red, green, and blue, respectively. And at least one first transparent portion.

  With this configuration, when displaying an image, a color image can be displayed without deterioration in resolution.

  In the first display device of the present invention, when the image is not displayed by a plurality of the image display element units, a plurality of the first shutter units respectively transmit the light and display the plurality of the image displays. In the case where the image is displayed by the element unit, it is preferable that the plurality of first shutter units block the light.

  As described above, when an image is not displayed on the display panel, light from the back surface to the front surface of the barrier is allowed to pass, so that when the display device is viewed from the front surface, the background behind the display device (for example, mechanical type) Meter display) can be seen through. On the other hand, when displaying an image on the display panel, the background behind the display device cannot be seen when the display device is viewed from the front by blocking the light from the back to the front of the barrier. This makes it easy to see the image displayed on the screen.

  In the first display device of the present invention, when the image is not displayed by a plurality of the image display element units, a plurality of the first shutter units respectively transmit the light and a plurality of the first display units. When the two shutter portions each block the light and display the image by the plurality of image display element portions, the plurality of first shutter portions respectively block the light, It is preferable that a plurality of the second shutter portions pass the light respectively.

  As described above, when an image is not displayed on the display panel, the display device is viewed from the front by passing light from the back surface to the front surface of the barrier by the first shutter portion corresponding to the first transparent portion. In this case, the background behind the display device (for example, the display of a mechanical meter) can be seen through, and the light from the back surface to the front surface of the barrier is blocked by the second shutter portion corresponding to the image display element portion. By doing so, it is possible to make the background easy to see. On the other hand, when displaying an image on the display panel, the second shutter unit corresponding to the image display element unit allows light from the back to the front of the barrier to pass therethrough, and the display device is displayed when viewed from the front. The image displayed on the panel can be easily seen, while the first shutter portion corresponding to the first transparent portion blocks the light from the back surface to the front surface of the barrier, thereby providing a background behind the display device. Since it becomes invisible, the image displayed on the display panel can be made easier to see.

  In the first display device of the present invention, when the image is not displayed by the plurality of image display element units, the plurality of first shutter units and the plurality of second shutter units are respectively When blocking the light and displaying the image by a plurality of the image display element units, a plurality of the first shutter units block the light and a plurality of the second shutter units, respectively. However, the light may pass through each.

  Thus, when an image is not displayed on the display panel, not only the first shutter unit but also the second shutter unit blocks the light from the back surface to the front surface of the barrier so that the display device can be When viewed from above, the background behind the display device cannot be seen, and an effect as if the blinds were lowered can be expected.

  In the first display device of the present invention, when the image is not displayed by the plurality of image display element units, the plurality of first shutter units and the plurality of second shutter units are respectively In a case where light is allowed to pass and the image is displayed by a plurality of the image display element units, a plurality of the first shutter units each block the light and a plurality of the second shutter units. However, the light may pass through each.

  As described above, when an image is not displayed on the display panel, light from the back surface to the front surface of the barrier is allowed to pass through the first shutter portion, and also from the back surface to the front surface of the barrier in the second shutter portion. By allowing light to pass through, the background behind the display device can be made brighter when the display device is viewed from the front.

  In the first display device of the present invention, when the barrier is disposed on the front side of the display panel, the interval between the adjacent image display element portions is the same as the interval between the adjacent optical element portions. Or, when the barrier is disposed on the back side of the display panel wider than the interval, the interval between the adjacent image display element portions is the same as the interval between the adjacent optical element portions, or Narrower than the interval is preferred.

  With this configuration, it is possible to widen a range in which an image displayed on the display panel can be appropriately viewed without unevenness in front of the display device.

  A second display device of the present invention is a display device capable of displaying an image, and includes a display panel, a surface light source disposed on the back side of the display panel, a front side of the display panel, A barrier disposed between the display panel and the surface light source and at any position on the back side of the surface light source, and the display panel displays an image on the front surface of the display panel. The plurality of image display element portions and a plurality of first transparent portions for allowing light to pass from the back surface to the front surface of the display panel are arranged on the same plane, and the surface light source includes the surface light source. A plurality of light emitting units that respectively irradiate light from the front surface of the light source and a plurality of second transparent portions for allowing light to pass from the back surface to the front surface of the surface light source, respectively, are arranged on the same surface, The barrier includes a plurality of optical element portions and a front surface from the back of the barrier. Or each light to pass through to a plurality of first shutter portion for or block them light, and the gist that made arranged on the same plane.

  Thus, also in the second display device, an image can be displayed on the display panel by the plurality of image display element units. In addition, when the display device is viewed from the front surface by passing or blocking light from the back surface to the front surface of the display panel by the plurality of first shutter portions, the background ( For example, a mechanical meter display) can be shown through or hidden. Further, by illuminating the display panel from the back surface with the plurality of light emitting units, an image displayed on the display panel can be made bright. Furthermore, since the second display device does not use a half mirror, the depth of the display device itself can be shortened, and the space occupied by the display device can be reduced. In addition, by adopting the above configuration, it is possible to view the image displayed on the display panel or the background behind the display device at a predetermined viewing position and not at other positions. it can.

  In the second display device of the present invention, it is preferable that each of the optical element units is a second shutter unit for allowing light to pass through or blocking the light from the back surface to the front surface of the barrier. .

  As described above, the optical element unit is the second shutter unit, and, for example, the display panel can be formed by passing or blocking light from the back surface to the front surface of the barrier corresponding to the image display element unit. When displaying an image on the display device, it is possible to make the image easier to see when the display device is viewed from the front, or to make it easier to see the background behind the display device when the image is not displayed.

  In the second display device of the present invention, each of the optical element portions may be a third transparent portion for allowing light to pass from the back surface to the front surface of the barrier.

  In this way, when displaying an image on the display panel, the image can be easily viewed when the display device is viewed from the front.

  In the second display device of the present invention, the plurality of light emitting units in the surface light source correspond one-to-one with the plurality of image display element units in the display panel, and the plurality of second light sources in the surface light source. The transparent portions correspond to the plurality of first transparent portions in the display panel in a one-to-one correspondence, and the plurality of optical element portions in the barrier pair to the plurality of image display element portions in the display panel, respectively. It is preferable that the plurality of first shutter portions in the barrier correspond one-to-one with the plurality of first transparent portions in the display panel.

  Thus, the light emitting units and the image display element units have a one-to-one correspondence, so that the light from the light emitting units can be effectively incident on the corresponding image display element units. In addition, since the second transparent portion and the shutter portion have a one-to-one correspondence, the light that has passed through the second transparent portion can be effectively incident on the corresponding shutter portion. On the other hand, since the optical element part and the image display element part have a one-to-one correspondence, it is possible to effectively exchange light between the corresponding optical element part and the image display element part. In addition, since the first shutter portion and the first transparent portion have a one-to-one correspondence, light is effectively exchanged between the corresponding first shutter portion and the first transparent portion. Can do.

  In the second display device of the present invention, the image display element portion and the first transparent portion are alternately arranged in at least one of a horizontal direction and a vertical direction in the display panel, The light emitting unit and the second transparent unit are alternately arranged in at least one of the horizontal direction and the vertical direction of the surface light source, and the optical element unit and the first shutter unit are It is preferable that the barriers are alternately arranged in at least one of a horizontal direction and a vertical direction.

  By arranging in this way, when the display device is viewed from the front, the image displayed when the image is displayed and the background behind the display device when the image is not displayed are shown in a balanced manner. The image quality can be improved, and the light from the light emitting portion can be used effectively.

  In the second display device of the present invention, the image display element part and the first transparent part are arranged in a checkered pattern, and the light emitting part and the second transparent part are checkered. Preferably, the optical element part and the second shutter part are arranged in a checkered pattern. The image display element portion and the first transparent portion are arranged in a stripe shape, and the light emitting portion and the second transparent portion are arranged in a stripe shape. The optical element portion and the second shutter portion may be arranged in a stripe shape.

  By arranging in this way, when the display device is viewed from the front, the image displayed when the image is displayed and the background behind the display device when the image is not displayed are shown in a more balanced manner. In addition, the image quality can be further improved, and the light from the light emitting unit can be used more effectively.

  In the second display device of the present invention, when the image is not displayed by the plurality of image display element units, the plurality of first shutter units allow the light to pass through and the plurality of the light emitting units, respectively. Each of which stops the irradiation of the light from the front surface of the surface light source, and when displaying the image by a plurality of the image display element units, a plurality of the first shutter units, respectively, It is preferable that the plurality of light emitting units each irradiate the light from the front surface of the surface light source while blocking light.

  As described above, when an image is not displayed on the display panel, light from the back surface to the front surface of the barrier is allowed to pass, so that when the display device is viewed from the front surface, the background behind the display device (for example, mechanical type) Meter display) can be seen through. At this time, by stopping the irradiation of light from the surface light source, the background behind the display device can be more easily seen. On the other hand, when displaying an image on the display panel, the background behind the display device cannot be seen when the display device is viewed from the front by blocking the light from the back to the front of the barrier. This makes it easy to see the image displayed on the screen. At this time, the display panel is illuminated from the back by a surface light source, so that an image displayed on the display panel can be made bright.

  In the second display device of the present invention, when the image is not displayed by the plurality of image display element units, the plurality of first shutter units respectively transmit the light and the plurality of the second shutter units. Each of the plurality of light-emitting units stops the irradiation of the light from the front surface of the surface light source, and displays the image by the plurality of image display element units. A plurality of the first shutter sections block the light, a plurality of the second shutter sections respectively transmit the light, and a plurality of the light emitting sections respectively The light is preferably irradiated from the front surface of the surface light source.

  As described above, when an image is not displayed on the display panel, the display device is viewed from the front by passing light from the back surface to the front surface of the barrier by the first shutter portion corresponding to the first transparent portion. In this case, the background behind the display device (for example, the display of a mechanical meter) can be seen through, and the light from the back surface to the front surface of the barrier is blocked by the second shutter portion corresponding to the image display element portion. By doing so, it is possible to make the background easy to see. At this time, the background can be more easily seen by stopping the irradiation of light from the surface light source. On the other hand, when displaying an image on the display panel, the second shutter unit corresponding to the image display element unit allows light from the back to the front of the barrier to pass therethrough, and the display device is displayed when viewed from the front. The image displayed on the panel can be easily seen, while the first shutter portion corresponding to the first transparent portion blocks the light from the back surface to the front surface of the barrier, thereby providing a background behind the display device. Since it becomes invisible, the image displayed on the display panel can be made easier to see. At this time, the display panel is illuminated from the back by a surface light source, so that an image displayed on the display panel can be made bright.

  In the second display device of the present invention, when the image is not displayed by the plurality of image display element units, the plurality of first shutter units and the plurality of second shutter units are respectively A plurality of the light emitting units stop light irradiation from the front surface of the surface light source and display the image by the plurality of image display element units, respectively, while blocking light. Each of the first shutter sections blocks the light, and each of the plurality of second shutter sections transmits the light, and each of the plurality of light emitting sections is disposed from the front surface of the surface light source. You may make it irradiate light.

  Thus, when an image is not displayed on the display panel, not only the first shutter unit but also the second shutter unit blocks the light from the back surface to the front surface of the barrier so that the display device can be When viewed from above, the background behind the display device cannot be seen, and an effect as if the blinds were lowered can be expected.

  In the second display device of the present invention, when the image is not displayed by the plurality of image display element units, the plurality of first shutter units and the plurality of second shutter units are respectively A plurality of the light emitting units stop light irradiation from the front surface of the surface light source and display the image by a plurality of the image display element units, respectively, while allowing light to pass through. Each of the first shutter sections blocks the light, and each of the plurality of second shutter sections transmits the light, and each of the plurality of light emitting sections is disposed from the front surface of the surface light source. You may make it irradiate light.

  As described above, when an image is not displayed on the display panel, light from the back surface to the front surface of the barrier is allowed to pass through the first shutter portion, and also from the back surface to the front surface of the barrier in the second shutter portion. By allowing light to pass through, the background behind the display device can be made brighter when the display device is viewed from the front.

  In the second display device of the present invention, it is preferable that the interval between the adjacent image display element portions is equal to or smaller than the interval between the adjacent light emitting portions. When the barrier is disposed on the front side of the display panel, the interval between the adjacent image display element portions is the same as or wider than the interval between the adjacent optical element portions, When the barrier is disposed between the display panel and the surface light source or on the back side of the surface light source, the interval between the adjacent image display element portions is the same as the interval between the adjacent optical element portions. Or it is preferable that it is narrower than the space | interval.

  With this configuration, it is possible to widen a range in which an image displayed on the display panel can be appropriately viewed without unevenness in front of the display device.

  Note that the present invention is not limited to the aspect of the device invention such as the display device described above, and can also be realized as a method invention such as a display method.

Hereinafter, embodiments of the present invention will be described in the following order based on examples.
A. First embodiment:
A-1. Summary of Examples:
A-2. Example configuration:
A-3. Example operation:
A-3-1. LCD display mode:
A-3-2. Meter display mode:
A-4. How to determine dimensions:
A-5. Effects of the embodiment:
B. Second embodiment:
B-1. Summary of Examples:
B-2. Example configuration:
B-3. Example operation:
B-3-1. EL display mode:
B-3-2. Meter display mode:
B-4. Effects of the embodiment:
C. Variation:

A. First embodiment:
A-1. Summary of Examples:
FIG. 1 is an explanatory view schematically showing a display device as a first embodiment of the present invention. The display device 100 according to the present embodiment is an in-vehicle display device, and as illustrated in FIG. 1, a barrier 130, a liquid crystal display panel 110 disposed behind the barrier 130, and a rear of the 110. The backlight 150 and the controller 170 are provided. Among these, the barrier 130, the liquid crystal display panel 110, and the backlight 150 are attached to the front of the mechanical meter 200 in an instrument panel (not shown) of a vehicle (not shown).

  A mode switching signal 172 and an image signal 174 are input from the outside to the controller 170, and the controller 170, based on these signals, a barrier driving signal 175 for driving the barrier 130, and a liquid crystal A panel drive signal 176 for driving the display panel 110 and a light drive signal 177 for driving the backlight 150 are generated. The display device 100 operates by switching between a liquid crystal display mode and a meter display mode as an image display mode in response to a mode switching signal 172 input to the controller 170.

  In the liquid crystal display mode, the backlight 150 irradiates the back surface of the liquid crystal display panel 110 with light. The liquid crystal display panel 110 receives light from the backlight 150 and displays a desired image based on the image signal 174 input to the controller 170. The barrier 130 is driven so that light emitted from the backlight 150 and passing through the liquid crystal display panel 110 passes, but light from the mechanical meter 200 is blocked. As a result, when viewed from the driver who is the viewer 300, as shown in FIG. 1A, the image displayed on the liquid crystal display panel 110 can be seen through the barrier 130 but is behind the backlight 150. The display of the meter 200 is blocked by the barrier 130 and cannot be seen.

  On the contrary, in the meter display mode, the backlight 150 stops irradiating light on the back surface of the liquid crystal display panel 110. The liquid crystal display panel 110 stops displaying images. Barrier 130 is driven to pass light from mechanical meter 200. As a result, when viewed from the driver who is the viewer 300, as shown in FIG. 1B, no image is displayed on the liquid crystal display panel 110. Instead, the barrier 130, the liquid crystal display panel 110, and the backlight 150 are provided. Through the watermark, the display of the mechanical meter 200 behind the backlight 150 is visible.

A-2. Example configuration:
2 and 3 are explanatory views schematically showing the sections of the barrier 130, the liquid crystal display panel 110, and the backlight 150 in FIG. 1, respectively. Among these, FIG. 2 shows the state in the liquid crystal display mode, and FIG. 3 shows the state in the meter display mode.

  As shown in these drawings, the barrier 130 is configured by sandwiching a liquid crystal layer 132 between two glass substrates 133 and 134. Among these, the liquid crystal layer 132 includes a liquid crystal and an alignment film (not shown), and is divided into a main shutter portion 136 and a sub shutter portion 138 in the surface direction. The plurality of main shutter portions 136 and the plurality of sub shutter portions 138 are alternately arranged in the surface direction. In addition, the barrier 130 includes a transparent electrode, a polarizing filter, a scanning line driving circuit, a data line driving circuit, and the like, which are omitted in the drawing.

  Among these, each main shutter part 136 and each sub-shutter part 138 are switched between an open state and a cut-off state by liquid crystal driving, and in the open state, light is allowed to pass from the back to the front of the barrier 130 and cut off. In state, block those lights. However, the main shutter portion 136 and the sub shutter portion 138 are switched so that the states are opposite to each other. That is, when the main shutter unit 136 is in the open state, the sub shutter unit 138 is in the closed state, and when the main shutter unit 136 is in the closed state, the sub shutter unit 138 is in the open state. Respectively.

  The liquid crystal display panel 110 is configured by sandwiching both of them by two glass substrates 116 and 118 and disposing a filter layer 114 on the glass substrate 118 located in front of the liquid crystal layer 112. Among these, the liquid crystal layer 112 is divided into an image display element part 120 and a transparent part 122 in the plane direction, and the image display element part 120 is composed of a liquid crystal and an alignment film (not shown), and is transparent. The part 122 is made of transparent resin or glass. The plurality of image display element portions 120 and the plurality of transparent portions 122 are alternately arranged in the plane direction. Further, the filter layer 114 includes three color filters 124R, 124G, and 124B of red (R), blue (B), and green (B), respectively, in a portion positioned in front of each image display element unit 120. Among them, the color filter of any color is arranged, and the transparent part 125 is arranged so that light can be transmitted to the other part, that is, the part located in front of each transparent part 122. Yes. In addition, the liquid crystal display panel 110 includes a transparent electrode, a polarizer, a scanning line driving circuit, a data line driving circuit, and the like, which are omitted in the drawing.

  Among these, each image display element unit 120 displays a color image in cooperation with each of the RGB color filters 124R, 124G, and 124B disposed on the front surface thereof by liquid crystal driving.

  The backlight 150 is configured by supporting the light emitting layer 152 with a glass substrate 154. Among these, the light emitting layer 152 is divided into a light emitting portion 156 and a transparent portion 158, and a plurality of light emitting portions 156 and a plurality of transparent portions 158 are alternately arranged in the plane direction. Among these, each light emission part 156 is comprised by the electroluminescence (EL) device, respectively, and irradiates light toward the liquid crystal display panel 110. FIG. Each transparent portion 158 is made of a transparent resin or glass, and transmits light from the back surface of the backlight 150 toward the front surface. Note that the backlight 150 also includes an electrode for supplying power to the light emitting layer 152, but is omitted in the drawing. It is desirable that a light shielding unit is provided between the light emitting unit 156 and the mechanical meter 200. The light shielding portion may be an electrode for supplying power to the light emitting layer 152, and is formed of, for example, aluminum or silver. Further, the light emission luminance of the light emitting unit 156 is adjusted so that the viewer 300 does not recognize the display of the mechanical meter 200 via the light emitting unit 156, the plurality of image display element units 120, and the color filters 124R, 124G, and 124B. May be. When the plurality of shutter parts 122 are in a state of transmitting light, the viewer 300 can view the display of the mechanical meter 200 via the transparent parts 125 and 158 and the shutter part 122. As long as it is possible, transparent in this specification is not intended to be formed of a material that does not have dust.

  4 is an explanatory diagram showing the barrier 130 in FIGS. 2 and 3 as viewed from the viewer 300 side, and FIG. 5 shows the liquid crystal display panel 110 in FIGS. 2 and 3 as viewed from the viewer 300 side. FIG. 6 is an explanatory diagram showing the backlight 150 in FIGS. 2 and 3 as viewed from the viewer 300 side.

  As described above, in the barrier 130, the plurality of main shutter portions 136 and the plurality of sub shutter portions 138 are alternately arranged in the plane direction. Specifically, as shown in FIG. Are lined up.

  Also in the liquid crystal display panel 110, as described above, the plurality of image display element portions 120 and the plurality of transparent portions 122 are alternately arranged in the plane direction. Specifically, in the case of the barrier 130, Similarly, as shown in FIG. 5, they are arranged in a checkered pattern. In addition, the RGB color filters 124R, 124G, and 124B on the front surface of each image display element unit 120 are arranged so as to be evenly distributed in the surface direction.

  In the present embodiment, as shown at the left end of FIG. 5, one pixel is constituted by three image display element portions 120 having RGB color filters 124R, 124G, and 124B on the front surface and three transparent portions 122. In the liquid crystal display panel 110, the shapes of the image display element part 120 and the transparent part 122 are designed so that each of these pixels forms a square (square pixel).

  Further, in the backlight 150, as described above, the plurality of light emitting units 156 and the plurality of transparent units 158 are alternately arranged in the plane direction. Specifically, in the case of the barrier 130 and the liquid crystal display panel 110, Similarly to FIG. 6, they are arranged in a checkered pattern as shown in FIG.

  7 shows the main shutter portion 136 and the sub shutter portion 138 in the barrier 130 of FIG. 4, the image display element portion 120 and the transparent portion 122 in the liquid crystal display panel 110 in FIG. 5, and the light emitting portion 156 in the backlight 150 in FIG. It is explanatory drawing which shows the positional correspondence with the transparent part 158. FIG.

  In the present embodiment, as shown in FIG. 7, the image display element section 120 in the liquid crystal display panel 110 and the sub-shutter section 138 in the barrier 130 correspond to each other in a one-to-one correspondence, and the liquid crystal display The transparent part 122 in the panel 110 and the main shutter part 136 in the barrier 130 correspond one-on-one in position.

  Similarly, the image display element unit 120 in the liquid crystal display panel 110 and the light emitting unit 156 in the backlight 150 correspond one-to-one in position, and the transparent unit 122 in the liquid crystal display panel 110 and the backlight The transparent portions 158 in the light 150 correspond one-on-one in position. FIG. 7 shows a case where the main shutter 136 is in the shut-off state and the sub-shutter 138 is in the open state.

  In this embodiment, the liquid crystal display panel 110 corresponds to the display panel in the claims, and the backlight 150 corresponds to the surface light source in the claims.

A-3. Example operation:
A-3-1. LCD display mode:
When the input mode switching signal 172 indicates the liquid crystal display mode, the controller 170 causes each light emitting unit 156 to the image display element unit 120 with respect to the backlight 150 by the light driving signal 177. Control to irradiate light. In addition, the controller 170 controls the barrier 130 so that each main shutter 136 is in a blocking state and each sub-shutter 138 is in an open state with respect to the barrier 130. Further, the controller 170 cooperates with the color filters 124R, 124G, and 124B based on the image signal 174 input to the liquid crystal display panel 110 by the panel drive signal 176, respectively. Control to display a color image.

  As a result, as shown in FIG. 2, the light emitted from each light emitting unit 156 in the backlight 150 is incident on the corresponding image display element unit 120 in the liquid crystal display panel 110. The incident light is modulated in each image display element unit 120 in accordance with the image signal 174, and then converted into light of each color of RGB via the color filters 124R, 124G, and 124B. Further, light of each color of RGB obtained by the conversion is incident on the corresponding sub-shutter unit 138 in the barrier 130. Since all the sub shutter parts 138 are in the open state, the incident light passes through the sub shutter parts 138 and reaches the viewer 300. On the other hand, light from the mechanical meter 200 is transmitted through the transparent portions 158 in the backlight 150, and is also transmitted through the corresponding transparent portions 122 in the liquid crystal display panel 110. However, since all the corresponding main shutter portions 136 are blocked in the barrier 130, the light transmitted through the backlight 150 and the liquid crystal display panel 110 is blocked in the barrier 130, so that the viewer 300 is not reached. It should be noted that if a light shielding unit is provided between the light emitting unit 156 and the mechanical meter 200, light does not pass through the backlight 150.

  Therefore, in such a liquid crystal display mode, a color image displayed on the liquid crystal display panel 110 can be viewed through the barrier 130 when viewed from the driver who is the viewer 300, but the machine behind the backlight 150. The display of the expression meter 200 is blocked by the barrier 130 and cannot be seen. The main shutter unit 136 and the sub shutter unit 138 may be controlled so as to be in the open state. In this way, when viewed from the driver who is the viewer 300, the color image displayed on the liquid crystal display panel 110 can be seen, and the backlight 150 can be seen through the liquid crystal display panel 110 and the backlight 150. The display of the mechanical meter 200 at the back of can be seen in an overlapping manner.

A-3-2. Meter display mode:
On the other hand, when the input mode switching signal 172 indicates the meter display mode, the controller 170 causes each light emitting unit 156 to display the image display element unit with respect to the backlight 150 by the light driving signal 178. Control is performed to stop the irradiation of light to 120. Further, the controller 170 controls the liquid crystal display panel 110 such that each image display element unit 120 stops displaying an image by the panel drive signal 176. Furthermore, the controller 170 controls the barrier 130 so that each sub-shutter unit 138 is in a blocking state and each main shutter unit 136 is in an open state with respect to the barrier 130.

  As a result, as shown in FIG. 3, the light from the mechanical meter 200 is transmitted through the transparent portions 158 in the backlight 150, and is also transmitted through the corresponding transparent portions 122 in the liquid crystal display panel 110. In the barrier 130, the corresponding main shutter portions 136 are all open, so that the light that has passed through the backlight 150 and the liquid crystal display panel 110 passes through the main shutter portion 136 to the viewer 300. To reach. On the other hand, in the backlight 150, the irradiation of the light from each light emission part 156 has stopped, and also in the liquid crystal display panel 110, the image display by each image display element part 120 has also stopped. Further, in the barrier 130, all the sub-shutter portions 138 are in a blocked state, and therefore, the light other than the light transmitted from the mechanical meter 200 through the backlight 150 and the liquid crystal display panel 110 is blocked by the sub-shutter portion 138. Will be.

  Therefore, in such meter display mode, when viewed from the driver who is the viewer 300, the display image of the liquid crystal display panel 110 disappears, and the barrier 150, the liquid crystal display panel 110 and the backlight 150 are watermarked, and the backlight 150 The display of the mechanical meter 200 at the rear can be seen.

A-4. How to determine dimensions:
Next, a method for determining the distance between the liquid crystal display panel 110 and the backlight 150 and the interval between adjacent light emitting units 156 in the backlight 150 will be described.

  8 and 9 are diagrams for explaining a method of determining the distance between the liquid crystal display panel 110 and the backlight 150 in the display device 100 of FIG. 1 and the interval between adjacent light emitting units 156 in the backlight 150. FIG.

  8 and 9, the viewing surface 310 is a plane parallel to the liquid crystal display panel 110, the backlight 150, and the like, and is a surface at the same position as the viewer 300.

  Moreover, in FIG. 8, A shows the standard reachable range of a display image. Specifically, in the liquid crystal display mode, a standard range in which the color image displayed on the liquid crystal display panel 110 can reach the viewing surface 310 in an appropriate display state. B indicates a standard distance between the viewing surface and the liquid crystal display panel. Specifically, this is a standard assumed distance from the liquid crystal display panel 110 to the viewing surface 310. C indicates the distance between the liquid crystal display panel and the backlight. Specifically, for example, the distance between the liquid crystal layer 112 of the liquid crystal display panel 110 and the light emitting layer 152 of the backlight 150. D is an interval between the adjacent image display element part 120 and the transparent part 122, and D × 2 indicates an interval between the adjacent image display element parts. Specifically, D × 2 is an interval between adjacent image display element units 120 in the liquid crystal display panel 110. E is an interval between the light emitting unit 156 and the transparent unit 158, and E × 2 indicates an interval between adjacent light emitting units. Specifically, E × 2 is an interval between adjacent light emitting units 156 in the backlight 150.

  As shown in FIG. 8, the value of A is a line connecting the center of the light emitting unit 156 of the backlight 150 and the center of the image display element unit 120 of the liquid crystal display panel 110 to the transparent unit 158 from the mechanical meter 200. The points where the line connecting the center of the image and the center of the image display element unit 120 of the liquid crystal display panel 110 intersect with the observation plane 310 are the arrival points O and P, respectively. The value of A corresponds to the distance between the reaching points P and O. In the liquid crystal display mode shown in FIG. 2, when viewed from the viewer 300, the color image displayed on the liquid crystal display panel 110 is viewed at the arrival point O, and is displayed on the liquid crystal display panel 110 at the arrival point P. The displayed color image can be made invisible. Further, in the meter display mode shown in FIG. 3, a light shielding unit is provided between the light emitting unit 156 and the mechanical meter 200, and each sub-shutter unit 138 is cut off, and each main shutter unit 136 is In the open state, when viewed from the viewer 300, at the reaching point O, the background mechanical meter 200 is seen, and at the reaching point P, the background mechanical meter 200 is not visible. It can be.

  Among these values, the values A, B, and D are known values, and the values C and E are determined based on these values.

Accordingly, in FIG. 8, when focusing on the right triangle α existing between the viewing surface 310 and the liquid crystal display panel 110 and the right triangle β existing between the liquid crystal display panel 110 and the backlight 150, Has a similar shape. Therefore, equation (1) is taxed.
A: B = E: C (1)

On the other hand, in FIG. 8, attention is paid to a right triangle γ existing between the viewing surface 310 and the liquid crystal display panel 110 and a right triangle δ existing between the viewing surface 310 and the backlight 150. Both are similar. Therefore, Formula (2) is materialized.
B: D × 2 = (B + C): E × 2 (2)

  Therefore, each value of C and E can be obtained and determined by solving the simultaneous equations of these equations (1) and (2).

  Note that the distance between the liquid crystal display panel 110 and the barrier 130 and the distance between adjacent sub-shutter portions 138 in the barrier 130 can also be determined by using the same method as described above. The description about is omitted.

  In this embodiment, as shown in FIGS. 8 and 9, the interval between adjacent image display element portions in the liquid crystal display panel 110 is narrower than the interval between adjacent light emitting portions in the backlight 150 (that is, , D × 2 <E × 2), and is configured to be wider than the interval between adjacent sub-shutter portions in the barrier 130. By doing so, it is possible to widen the range in which the image displayed on the liquid crystal display panel 110 can be properly viewed without unevenness on the viewing surface 310.

A-5. Effects of the embodiment:
As described above, according to the present embodiment, in the liquid crystal display mode, the sub-shutter unit 138 corresponding to the image display element unit 120 is in the open state in the barrier 130. Although light emitted from the light emitting unit 156 of the light 150 and passing through the image display element unit 120 is allowed to pass, the main shutter unit 136 corresponding to the transparent unit 122 is in a blocking state. The light transmitted from the expression meter 200 through the transparent portion 158 of the backlight 150 and further transmitted through the transparent portion 122 is blocked. Therefore, when viewed from the driver who is the viewer 300, the image displayed on the liquid crystal display panel 110 is visible through the barrier 130, but the display of the mechanical meter 200 behind the backlight 150 is displayed on the barrier 130. Since it is blocked and cannot be seen, the image displayed on the liquid crystal display panel 110 can be easily viewed. At this time, since the back surface of the liquid crystal display panel 110 is illuminated by the light emitting unit 156 of the backlight 150, the image displayed on the liquid crystal display panel 110 can be made bright.

  In the meter display mode, the main shutter unit 136 corresponding to the transparent unit 122 is opened in the barrier 130, so that the main shutter unit 136 transmits the transparent unit 158 of the backlight 150 from the mechanical meter 200. In addition, the light transmitted through the transparent portion 122 is allowed to pass therethrough. When viewed from the driver who is the viewer 300, the display of the mechanical meter 200 behind the backlight 150 can be seen through. On the other hand, since the sub-shutter unit 138 corresponding to the image display element unit 120 is in a blocked state, light other than the light transmitted from the mechanical meter 200 through the backlight 150 and the liquid crystal display panel 110 is blocked by the barrier 130. Can be prevented from reaching the viewer 300. At this time, by stopping the irradiation of light from the light emitting unit 156 of the backlight 150, it is possible to make the display of the mechanical meter 200 behind the backlight 150 easier to see.

  Furthermore, according to the present embodiment, since the display device 100 does not use a half mirror, the depth of the display device 100 itself can be shortened, and the space occupied by the display device 100 can be reduced.

B. Second embodiment:
B-1. Summary of Examples:
In the display device 100 in the first embodiment described above, the liquid crystal display panel 110 and the backlight 150 are used. In this embodiment, instead of these, an electroluminescence (EL) display with a shutter unit is provided. A panel is used.

  FIG. 10 is an explanatory view schematically showing a display device as a second embodiment of the present invention. Similarly to the case of the first embodiment, the display device 100 ′ in this embodiment is an in-vehicle display device, and is arranged behind the barrier 130 and the barrier 130 as shown in FIG. An EL display panel 140 with a shutter unit and a controller 170 ′ are provided. Among these, the barrier 130 and the EL display panel 140 are attached to the front of the mechanical meter 200 in an instrument panel (not shown) of a vehicle (not shown).

  A mode switching signal 172 and an image signal 174 are input from the outside to the controller 170 ′, and the controller 170 ′ receives a barrier drive signal 175 for driving the barrier 130 based on these signals. A panel drive signal 178 for driving the EL display panel 140 is generated. As in the case of the first embodiment, the display device 100 ′ operates by switching between the EL display mode and the meter display mode as the image display mode in accordance with the mode switching signal 172 input to the controller 170. To do.

  In the EL display mode, the EL display panel 140 causes each of the image display element units (not shown) made up of EL devices to emit light based on the image signal 174 input to the controller 170 to display a desired image. The barrier 130 is driven to pass light from the EL display panel 140 but to block light from the mechanical meter 200. As a result, when viewed from the driver who is the viewer 300, as shown in FIG. 10A, the image displayed on the EL display panel 140 can be seen through the barrier 130, but the machine behind the EL display panel 140. The display of the expression meter 200 is blocked by the barrier 130 and cannot be seen.

  On the contrary, in the meter display mode, the EL display panel 140 stops the light emission by the image display element unit, and stops displaying the image. Barrier 130 is driven to pass light from mechanical meter 200. As a result, when viewed from the driver who is the viewer 300, as shown in FIG. 10B, no image is displayed on the EL display panel 140. Instead, the barrier 130 and the EL display panel 140 are watermarked, and the EL is displayed. The display of the mechanical meter 200 behind the display panel 140 will be visible.

B-2. Example configuration:
11 and 12 are explanatory views schematically showing the cross sections of the barrier 130 and the EL display panel 140 in FIG. 10, respectively. Among these, FIG. 11 shows the state in the EL display mode, and FIG. 12 shows the state in the meter display mode.

  As shown in these drawings, the EL display panel 140 is configured by sandwiching an EL layer 126 between two glass substrates 116 and 118. Among these, the EL layer 126 is divided into image display element portions 128R, 128G, and 128B corresponding to three colors of red (R), blue (B), and green (B) and a transparent portion 122 in the surface direction. ing. The plurality of image display element units and the plurality of transparent units 122 are alternately arranged in the plane direction. The image display element unit 128R corresponding to R is configured by an EL device that emits R light, and the image display element unit 128B corresponding to B is configured by an EL device that emits B light. The image display element unit 128G corresponding to G is configured by an EL device that emits G light. The transparent part 122 is made of a transparent resin or glass. Note that a light shielding layer is preferably provided on the mechanical meter 200 side of the EL devices provided in the image display element portions 128R, 128G, and 128B.

  Among these, each of the RGB image display element units 128R, 128G, and 128B emits light in a corresponding color when a voltage is applied, and displays a color image. Each transparent portion 122 allows light to pass from the back surface to the front surface of the EL display panel 140.

  The configuration of the barrier 130 is the same as that in the first embodiment, and a description thereof is omitted.

  Also in the present embodiment, the image display element portions 128R, 128G, and 128B in the EL display panel 140 and the sub-shutter portions 138 in the barrier 130 correspond to each other one-to-one, and the EL display panel 140 The position of the transparent portion 122 and the main shutter portion 136 of the barrier 130 correspond one-on-one.

  In this embodiment, the EL display panel 140 corresponds to the display panel in the claims.

B-3. Example operation:
B-3-1. EL display mode:
When the input mode switching signal 172 indicates the EL display mode, the controller 170 ′ causes the main shutter unit 136 to be in a shut-off state with respect to the barrier 130 by the barrier driving signal 175. The sub-shutter units 138 are controlled so as to be in the open state. In addition, the controller 170 ′ uses the panel drive signal 178 to input the RGB image display element units 128R, 128G, and 128B in corresponding colors based on the image signal 174 input to the EL display panel 140. Control is performed to emit light and display a color image.

  As a result, as shown in FIG. 11, in the EL display panel 140, light of each color of RGB modulated according to the image signal 174 is emitted from each of the RGB image display element units 128R, 128G, and 128B. The Then, the irradiated light of each color of RGB is incident on each corresponding sub-shutter unit 138 in the barrier 130. Since all the sub shutter parts 138 are in the open state, the incident light passes through the sub shutter parts 138 and reaches the viewer 300. On the other hand, light from the mechanical meter 200 passes through each transparent portion 122 in the EL display panel 140. However, since all the corresponding main shutter parts 136 are blocked in the barrier 130, the light transmitted through the EL display panel 140 is blocked in the barrier 130 and reaches the viewer 300. do not do.

  Therefore, in such an EL display mode, the color image displayed on the EL display panel 140 can be viewed through the barrier 130 when viewed from the driver who is the viewer 300, but is behind the EL display panel 140. The display of the mechanical meter 200 is blocked by 130 and cannot be seen. The main shutter unit 136 and the sub shutter unit 138 may be controlled so as to be in an open state. In this way, when viewed from the driver who is the viewer 300, the color image displayed on the EL display panel 140 can be seen, and the EL display panel 140 is watermarked behind the EL display panel 140. The display of a certain mechanical meter 200 can be seen superimposed.

B-3-2. Meter display mode:
On the other hand, when the input mode switching signal 172 indicates the meter display mode, the controller 170 ′ causes each sub-shutter unit 138 to be in a blocking state with respect to the barrier 130 by the barrier driving signal 175. Each main shutter unit 136 is controlled to be in an open state. In addition, the controller 170 ′ causes the RGB image display element units 128R, 128G, and 128B to stop emitting light in the corresponding colors to the EL display panel 140 in response to the panel drive signal 178, thereby displaying an image. Control to stop.

  As a result, as shown in FIG. 12, the light from the mechanical meter 200 passes through each transparent portion 122 in the EL display panel 140. In the barrier 130, the corresponding main shutter portions 136 are all open, so that the light transmitted through the EL display panel 140 passes through the main shutter portion 136 and reaches the viewer 300. On the other hand, on the EL display panel 140, the display of images by the RGB image display element units 128R, 128G, and 128B is also stopped. Further, in the barrier 130, all the sub-shutter portions 138 are in a blocking state, and therefore, the light other than the light transmitted from the mechanical meter 200 through the EL display panel 140 is blocked by the sub-shutter portion 138. .

  Therefore, in such a meter display mode, when viewed from the driver who is the viewer 300, the display image of the EL display panel 140 disappears, and the barrier 130 and the EL display panel 140 are watermarked and located behind the EL display panel 140. The display of the mechanical meter 200 can be seen.

B-4. Effects of the embodiment:
As described above, according to the present embodiment, in the EL display mode, since the sub shutter unit 138 corresponding to the image display element unit 120 is in the open state in the barrier 130, the sub shutter unit 138 has RGB. Although the light from each of the image display element portions 128R, 128G, and 128B is allowed to pass through, the main shutter portion 136 corresponding to the transparent portion 122 is in a cut-off state, so that the main shutter portion 136 is transparent from the mechanical meter 200. The light transmitted through the part 122 is blocked. Therefore, when viewed from the driver who is the viewer 300, the image displayed on the EL display panel 140 can be seen through the barrier 130, but the display of the mechanical meter 200 behind the EL display panel 140 is displayed on the barrier 130. Therefore, the image displayed on the EL display panel 140 can be easily viewed. At this time, each of the RGB image display element units 128R, 128G, and 128B in the EL display panel 140 emits a corresponding color, so that an image displayed on the EL display panel 140 can be made bright.

  In the meter display mode, the main shutter unit 136 corresponding to the transparent unit 122 is opened in the barrier 130. Therefore, the main shutter unit 136 transmits the light transmitted from the mechanical meter 200 through the transparent unit 122. Will pass through. When viewed from the driver who is the viewer 300, the display of the mechanical meter 200 behind the EL display panel 140 can be seen through. On the other hand, since the sub-shutter unit 138 corresponding to the image display element unit 120 is in a blocking state, light other than the light transmitted from the mechanical meter 200 through the EL display panel 140 is blocked by the barrier 130, so unnecessary light is viewed. The person 300 can be prevented from reaching. At this time, by stopping the light emission by the RGB image display element units 128R, 128G, and 128B on the EL display panel 140, the display of the mechanical meter 200 behind the EL display panel 140 can be more easily seen. it can.

  Further, according to the present embodiment, since the display device 100 ′ does not use a half mirror, the depth of the display device 100 ′ itself can be shortened, and the space occupied by the display device 100 ′ can be reduced.

  Further, according to the present embodiment, the backlight 150 is not required by using the EL display panel 140, and accordingly, the depth of the display device 100 ′ itself can be further reduced, and the display device 100 ′. The space occupied by can be reduced.

C. Variation:
The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the scope of the invention.

C-1. Modification 1:
In each of the above-described embodiments, the display device is mounted in front of the mechanical meter 200 on the instrument panel of the vehicle as a vehicle-mounted display device. However, the present invention is not limited to this. For example, it may be used as a display device of a gaming machine such as a pachinko machine, a slot machine, or a game machine. In addition, the display device of the present invention is attached to a window so that the scenery outside the window behind the display device can be seen through in the background display mode (corresponding to the meter display mode described above). Good.

C-2. Modification 2:
In the first embodiment described above, as shown in FIG. 5, in the liquid crystal display panel 110, the pixels configured by the three image display element portions 120 corresponding to RGB and the three transparent portions 122 are Each of the pixels has a square shape (square pixel), but the present invention is not limited to this.

  FIG. 13 is an explanatory view showing a liquid crystal display panel 110 as a modification as viewed from the viewer 300 side. In the liquid crystal display panel 110, for example, as shown in FIG. 13, the vertical lengths of the image display element sections 120 and the transparent sections 122 are each doubled to display three image displays corresponding to RGB. The pixels formed by the element part 120 and the three transparent parts 122 may each form a vertically long rectangle (vertically long pixel).

  In the first embodiment described above, as shown in FIG. 5, in the liquid crystal display panel 110, the plurality of image display element portions 120 and the plurality of transparent portions 122 are arranged in a checkered pattern in the plane direction. The RGB color filters 124R, 124G, and 124B are arranged so as to be evenly distributed in the plane direction, but the present invention is not limited to this.

  FIGS. 14 to 16 are explanatory views showing a liquid crystal display panel 110 as a modification as seen from the viewer 300 side. In the liquid crystal display panel 110, for example, as shown in FIG. 14, a plurality of image display element portions 120 and a plurality of transparent portions 122 may be arranged so as to be arranged in a vertically long stripe shape. Further, as shown in FIG. 15, a plurality of image display element portions 120 and a plurality of transparent portions 122 may be arranged in a horizontally long stripe shape. Further, as shown in FIG. 16, three image display element portions 120 corresponding to RGB may be grouped and three transparent portions 122 may be grouped and arranged so that both are arranged in a checkered pattern. .

  Needless to say, each of the modifications shown in FIGS. 13 to 16 can be similarly applied to each configuration in the second embodiment.

C-3. Modification 3:
In the first embodiment described above, a light source in which each light emitting unit 156 is configured by an EL device is used as the backlight 150. However, the present invention is not limited to this, and for example, a light guide plate is used. It may be. The light guide plate, for example, guides light guided into the acrylic from the light source to the entire acrylic surface using total reflection of the acrylic, and the light hitting the reflective dots changes its path and becomes an angle smaller than the total reflection angle. By utilizing the fact that the emitted light comes out from the acrylic surface, the reflective dots are appropriately arranged so that the light can be irradiated from a desired position on the acrylic surface.

C-4. Modification 4:
In each of the embodiments described above, the liquid crystal display panel 110 or the EL display panel 140 is used as the display panel. However, the present invention is not limited to this, and for example, a surface electric field display (Surface-conduction Electron-). Emitter Display (SED) may be used.

C-5. Modification 5:
In each of the above-described embodiments, the transparent portion 122 in the liquid crystal display panel 110 or the EL display panel 140 is made of transparent resin or glass. However, the present invention is not limited to this, and the liquid crystal and You may make it comprise with an orientation film etc. In this case, it is only necessary to always keep the part open so that light passes from the back to the front.

C-6. Modification 6:
In the first embodiment described above, in the meter display mode, the controller 170 controls the main shutter portion 136 in the barrier 130 to be in an open state and the sub shutter portion 138 to be in a shut-off state, respectively. The image display element unit 120 in the liquid crystal display panel 110 is controlled to stop displaying an image, but the present invention is not limited to this.

  For example, the controller 170 may control the main shutter unit 136 and the sub-shutter unit 138 in the barrier 130 so as to be in a blocking state. When controlled in this way, the light from the mechanical meter 200 passes through each transparent portion 158 in the backlight 150 and passes through each transparent portion 122 in the liquid crystal display panel 110, but in the barrier 130, Since the main shutter unit 136 and all the sub-shutter units 138 are in a blocking state, the light transmitted through the backlight 150 and the liquid crystal display panel 110 is completely blocked by the barrier 130, so that the viewer 300 Never reach.

  Therefore, for example, when such a display device is attached to a window as described above, in the above-described mode, when the display device is viewed from the front, the scenery outside the window behind the display device can also be seen. The effect is as if the blinds were lowered.

  Further, for example, in the meter display mode, the controller 170 may control the main shutter unit 136 and the sub shutter unit 138 in the barrier 130 so as to be in an open state. When controlled in this way, the light from the mechanical meter 200 passes through the transparent portions 158 of the backlight 150, passes through the transparent portions 122 of the liquid crystal display panel 110, and enters the barrier 130. In the barrier 130, all the main shutter portions 136 and all the sub shutter portions 138 are in an open state, so that the incident light passes through the main shutter portion 136 and the sub shutter portion 138 and is viewed by the viewer. Reach 300.

  Therefore, when the display device is viewed from the front, the display of the mechanical meter 200 can be made brighter.

  In the latter case, the sub-shutter unit 138 in the barrier 130 is always in an open state in both the liquid crystal display mode and the meter display mode, and allows light from the back surface to the front surface of the barrier 130 to pass therethrough. Therefore, in such a case, in the barrier 130, the sub-shutter portion 138 may be replaced with a transparent portion made of transparent resin or glass.

  Needless to say, the sixth modification can be similarly applied to the configuration of the second embodiment.

C-7. Modification 7:
In the first embodiment described above, in the barrier 130, the main shutter 136 is controlled so as to be in a shut-off state during the liquid crystal display mode and to be opened during the meter display mode. However, the main shutter 136 may be configured not only to switch between the open state and the shut-off state, but also to be able to express an intermediate state therebetween, that is, a halftone. In that case, for example, in the liquid crystal display mode, if the main shutter unit 136 is controlled so as to be in an intermediate state as necessary, only the image displayed on the liquid crystal display panel 110 is displayed. In addition, the display of the mechanical meter 200 behind the backlight 150 can also be shown through.

  Further, in the first embodiment described above, in the barrier 130, the main shutter portions 136 are all cut off simultaneously in the liquid crystal display mode, and are opened all together in the meter display mode. It is controlled to become. Therefore, each main shutter part 136 does not need to be controlled independently.

  However, if each main shutter unit 136 can be controlled independently and can express halftones, an image signal different from the image signal 174 is input to the controller 170. In accordance with the image signal, each main shutter unit 136 can display a monochrome image.

  The same applies to the sub-shutter unit 138 as well as the main shutter unit 136.

  Needless to say, the seventh modification can be similarly applied to the configuration of the second embodiment.

C-8. Modification 8:
In the first embodiment described above, the image display element section 120 in the liquid crystal display panel 110 and the sub-shutter section 138 in the barrier 130 correspond one-on-one in position, and the transparent section 122 in the liquid crystal display panel 110 The main shutter portions 136 in the barrier 130 correspond one-on-one with respect to each other, and the image display element portions 120 in the liquid crystal display panel 110 and the light-emitting portions 156 in the backlight 150 become one-on-one with respect to each other. Correspondingly, the transparent part 122 in the liquid crystal display panel 110 and the transparent part 158 in the backlight 150 correspond to each other one to one. In the second embodiment described above, the image display element portions 128R, 128G, and 128B in the EL display panel 140 and the sub-shutter portions 138 in the barrier 130 correspond to each other one to one, and the EL display panel. The transparent portion 122 in 140 and the main shutter portion 136 in the barrier 130 correspond one-on-one in position.

  However, the present invention is not limited to one-to-one correspondence as described above, and may be one-to-many or many-to-one correspondence.

C-9. Modification 9:
In the first embodiment described above, the interval between adjacent image display element portions in the liquid crystal display panel 110 is configured to be narrower (that is, 2D <2E) than the interval between adjacent light emitting portions in the backlight 150. However, the present invention is not limited to this, and the interval between adjacent image display element portions in the liquid crystal display panel 110 is configured to be wider than the interval between adjacent sub-shutter portions in the barrier 130. May be equal to the interval between adjacent light emitting portions in the backlight 150 or may be equal to the interval between adjacent sub-shutter portions in the barrier 130.

  Needless to say, the ninth modification can be similarly applied to the configuration of the second embodiment.

C-10. Modification 10:
In the first embodiment described above, the barrier 130 is disposed in front of the liquid crystal display panel 110. However, the present invention is not limited to this, and the barrier 130 includes the liquid crystal display panel 110 and the backlight 150. It may be arranged in between, or behind the backlight 150, that is, between the mechanical meter 200.

  Similarly, in the second embodiment described above, the barrier 130 is disposed in front of the EL display panel 140. However, the present invention is not limited to this, and the barrier 130 is disposed on the EL display panel 140. You may make it arrange | position behind, ie, the mechanical meter 200. FIG.

  That is, the barrier 130 only needs to function so that the main shutter 136 blocks light from the mechanical meter 200 and does not reach the viewer 300 at least in the meter display mode. The placement location may be any of the above locations.

  In the first embodiment described above, the interval between adjacent image display element portions in the liquid crystal display panel 110 is configured to be wider than the interval between adjacent sub-shutter portions in the barrier 130. As described above, when the barrier 130 is disposed between the liquid crystal display panel 110 and the backlight 150 or behind the backlight 150, the interval between adjacent image display element portions in the liquid crystal display panel 110 is as follows. The barrier 130 is preferably configured to be narrower or equal to the interval between adjacent sub-shutter portions.

Similarly, also in the second embodiment described above, the interval between adjacent image display element portions in the EL display panel 140 is configured to be wider than the interval between adjacent sub-shutter portions in the barrier 130. However, as described above, when the barrier 130 is disposed behind the EL display panel 140, the interval between the adjacent image display element portions in the EL display panel 140 is set between the adjacent sub-shutter portions in the barrier 130. It is preferable to configure so that it is narrower or equal to the interval.
Furthermore, a light-shielding layer is provided on the mechanical meter 200 side of the EL device provided in the image display element portions 128R, 128G, and 128B in the second embodiment, and the barrier 130 includes the EL device and the mechanical meter 200. It may be provided between. In this case, the sub shutter portion 138 may not be provided in the barrier 130. The barrier 130 controls both the main shutter 136 and the sub-shutter 138 so that light passes through in the meter display mode, and controls both the main shutter 136 and the sub-shutter 138 in the EL display mode. It may be controlled to shut off. In this way, the control of the barrier 130 is simplified.
Further, a light shielding layer is provided on the mechanical meter 200 side of the light emitting unit 156 of the backlight 150 in the first embodiment, and the barrier 130 is provided between the EL device and the mechanical meter 200. Also good. Also in this case, the sub-shutter unit 138 may not be provided in the barrier 130, and both the main shutter unit 136 and the sub-shutter unit 138 may be controlled to be either in a state of passing light or in a state of blocking light. Good.

It is explanatory drawing which showed typically the display apparatus as a 1st Example of this invention. FIG. 2 is an explanatory diagram schematically showing cross sections of a barrier 130, a liquid crystal display panel 110, and a backlight 150 in FIG. FIG. 2 is an explanatory diagram schematically showing cross sections of a barrier 130, a liquid crystal display panel 110, and a backlight 150 in FIG. FIG. 4 is an explanatory diagram showing the barrier 130 in FIGS. 2 and 3 as viewed from the viewer 300 side. FIG. 4 is an explanatory diagram showing the liquid crystal display panel 110 in FIGS. 2 and 3 as viewed from the viewer 300 side. FIG. 4 is an explanatory diagram showing the backlight 150 in FIGS. 2 and 3 as viewed from the viewer 300 side. The main shutter portion 136 and the sub shutter portion 138 in the barrier 130 in FIG. 4, the image display element portion 120 and the transparent portion 122 in the liquid crystal display panel 110 in FIG. 5, and the light emitting portion 156 and the transparent portion 158 in the backlight 150 in FIG. It is explanatory drawing which shows the positional correspondence of these. FIG. 2 is an explanatory diagram for explaining a method for determining a distance between a liquid crystal display panel 110 and a backlight 150 in the display device 100 of FIG. 1 and an interval between adjacent light emitting units 156 in the backlight 150. FIG. 2 is an explanatory diagram for explaining a method for determining a distance between a liquid crystal display panel 110 and a backlight 150 in the display device 100 of FIG. 1 and an interval between adjacent light emitting units 156 in the backlight 150. It is explanatory drawing which showed typically the display apparatus as a 2nd Example of this invention. It is explanatory drawing which showed typically the cross section of the barrier 130 and EL display panel 140 in FIG. It is explanatory drawing which showed typically the cross section of the barrier 130 and EL display panel 140 in FIG. It is explanatory drawing which showed the liquid crystal display panel 110 as a modification seen from the viewer 300 side. It is explanatory drawing which showed the liquid crystal display panel 110 as a modification seen from the viewer 300 side. It is explanatory drawing which showed the liquid crystal display panel 110 as a modification seen from the viewer 300 side. It is explanatory drawing which showed the liquid crystal display panel 110 as a modification seen from the viewer 300 side. It is the schematic which shows the conventional vehicle-mounted display apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Display apparatus 110 ... Liquid crystal display panel 112 ... Liquid crystal layer 114 ... Filter layer 116,118 ... Glass substrate 120 ... Image display element part 122 ... Transparent part 124R, 124G, 124B ... Color filter 125 ... Transparent part 126 ... Liquid crystal layer 128R 128G, 128B ... Image display element part 130 ... Barrier 132 ... Liquid crystal layer 133, 134 ... Glass substrate 136 ... Main shutter part 138 ... Sub-shutter part 140 ... EL display panel 150 ... Backlight 152 ... Light emitting layer 154 ... Glass substrate 156 ... Light emitting part 158 ... Transparent part 170 ... Controller 172 ... Mode switching signal 174 ... Image signal 175 ... Barrier driving signal 176 ... Panel driving signal 177 ... Light driving signal 178 ... Panel driving signal 178 ... Light driving signal 200 ... Mechanical memory Motor 300 ... viewer 310 ... viewing surface 910 ... display device 912 ... liquid crystal display panel 914 ... half mirror 920 ... mechanical meter 930 ... viewer

Claims (26)

A display device capable of displaying an image,
A display panel, and a barrier disposed on the front side or the back side of the display panel,
The display panel includes a plurality of image display element portions for displaying an image on the front surface of the display panel, and a plurality of first transparent portions for allowing light to pass from the back surface to the front surface of the display panel. Arranged on the same plane,
The barrier has a plurality of optical element portions and a plurality of first shutter portions for allowing light to pass through or blocking the light from the back to the front of the barrier. A display device characterized by comprising: The display device according to claim 1,
The display device according to claim 1, wherein each of the optical element portions is a second shutter portion for allowing light to pass through or blocking the light from the back surface to the front surface of the barrier. The display device according to claim 1,
Each of the optical element portions is a second transparent portion for allowing light to pass from the back surface to the front surface of the barrier. The display device according to any one of claims 1 to 3,
The plurality of optical element portions in the barrier correspond to the plurality of image display element portions in the display panel on a one-to-one basis, and the plurality of first shutter portions in the barrier include a plurality of the image display element portions in the display panel. The display device has a one-to-one correspondence with the first transparent portion. The display device according to any one of claims 1 to 3,
The image display element portion and the first transparent portion are alternately arranged in at least one of the horizontal direction and the vertical direction of the display panel,
The display device, wherein the optical element portion and the first shutter portion are alternately arranged in at least one of a horizontal direction and a vertical direction of the barrier. The display device according to claim 5,
The image display element part and the first transparent part are arranged in a checkered pattern,
The display device, wherein the optical element part and the first shutter part are arranged in a checkered pattern. The display device according to claim 5,
The image display element portion and the first transparent portion are arranged in a stripe shape,
The display device, wherein the optical element portion and the first shutter portion are arranged in a stripe shape. The display device according to any one of claims 1 to 3,
The display panel includes a plurality of pixels each forming a square, and each pixel includes at least three image display element units for displaying red, green, and blue, respectively, and at least one first transparent unit. And a display device comprising: The display device according to claim 1 or 3,
In a case where the image is not displayed by a plurality of the image display element units, a plurality of the first shutter units respectively pass the light and display the image by the plurality of image display element units. A display device, wherein each of the plurality of first shutter portions blocks the light. The display device according to claim 2,
When the image is not displayed by the plurality of image display element units, the plurality of first shutter units pass the light respectively, and the plurality of second shutter units respectively transmit the light. When the image is displayed by a plurality of the image display element units, a plurality of the first shutter units respectively block the light, and a plurality of the second shutter units Each of the display devices is characterized by allowing the light to pass therethrough. The display device according to claim 2,
When the image is not displayed by the plurality of image display element units, the plurality of first shutter units and the plurality of second shutter units block the light and display the plurality of image displays, respectively. When displaying the image by the element unit, a plurality of the first shutter units block the light, and a plurality of the second shutter units pass the light, respectively. Characteristic display device. The display device according to claim 2,
When the image is not displayed by the plurality of image display element units, the plurality of first shutter units and the plurality of second shutter units respectively transmit the light and display the plurality of image displays. When displaying the image by the element unit, a plurality of the first shutter units block the light, and a plurality of the second shutter units pass the light, respectively. Characteristic display device. The display device according to any one of claims 1 to 3,
When the barrier is disposed on the front side of the display panel, the interval between the adjacent image display element portions is the same as or wider than the interval between the adjacent optical element portions,
When the barrier is disposed on the back side of the display panel, the interval between the adjacent image display element portions is the same as or smaller than the interval between the adjacent optical element portions. Display device. A display device capable of displaying an image,
The display panel, a surface light source disposed on the back side of the display panel, the front side of the display panel, between the display panel and the surface light source, and any part of the back side of the surface light source And a barrier disposed on the
The display panel includes a plurality of image display element portions for displaying an image on the front surface of the display panel, and a plurality of first transparent portions for allowing light to pass from the back surface to the front surface of the display panel. Arranged on the same plane,
The surface light source includes a plurality of light emitting units that irradiate light from the front surface of the surface light source and a plurality of second transparent portions that respectively transmit light from the back surface to the front surface of the surface light source. Arranged on the top,
The barrier has a plurality of optical element portions and a plurality of first shutter portions for allowing light to pass through or blocking the light from the back to the front of the barrier. A display device characterized by comprising: The display device according to claim 14, wherein
The display device according to claim 1, wherein each of the optical element portions is a second shutter portion for allowing light to pass through or blocking the light from the back surface to the front surface of the barrier. The display device according to claim 14, wherein
Each of the optical element portions is a third transparent portion for allowing light to pass from the back surface to the front surface of the barrier. The display device according to any one of claims 14 to 16,
The plurality of light emitting units in the surface light source correspond one-to-one with the plurality of image display element units in the display panel, and the plurality of second transparent portions in the surface light source include a plurality of light emitting units in the display panel. Corresponding to each of the first transparent portions of the
The plurality of optical element portions in the barrier correspond to the plurality of image display element portions in the display panel on a one-to-one basis, and the plurality of first shutter portions in the barrier include a plurality of the image display element portions in the display panel. The display device has a one-to-one correspondence with the first transparent portion. The display device according to any one of claims 14 to 16,
The image display element portion and the first transparent portion are alternately arranged in at least one direction among a horizontal direction and a vertical direction in the display panel,
The light emitting part and the second transparent part are alternately arranged in at least one of the horizontal direction and the vertical direction of the surface light source,
The display device, wherein the optical element portion and the first shutter portion are alternately arranged in at least one of a horizontal direction and a vertical direction of the barrier. The display device according to claim 18, wherein
The image display element part and the first transparent part are arranged in a checkered pattern,
The light emitting part and the second transparent part are arranged so as to have a checkered pattern,
The display device, wherein both the optical element portion and the second shutter portion are arranged in a checkered pattern. The display device according to claim 18, wherein
The image display element portion and the first transparent portion are arranged in a stripe shape,
The light emitting part and the second transparent part are arranged in a stripe shape,
The display device, wherein the optical element portion and the second shutter portion are arranged in a stripe shape. The display device according to claim 14 or 16,
When the image is not displayed by the plurality of image display element units, the plurality of first shutter units respectively transmit the light, and the plurality of light emitting units are respectively front surfaces of the surface light sources. When the irradiation of the light from the light source is stopped and the image is displayed by a plurality of the image display element units, the plurality of first shutter units block the light and the plurality of the light emission units, respectively. Each of the units emits the light from the front surface of the surface light source. The display device according to claim 15,
When the image is not displayed by the plurality of image display element units, the plurality of first shutter units pass the light respectively, and the plurality of second shutter units respectively transmit the light. In the case where the plurality of light emitting units stop the irradiation of the light from the front surface of the surface light source and display the image by the plurality of image display element units, the plurality of first light emitting units are blocked. Each of the plurality of second shutter units allows the light to pass therethrough, and each of the plurality of light emitting units transmits the light from the front surface of the surface light source. A display device characterized by irradiation. The display device according to claim 15,
When the plurality of image display element units do not display the image, the plurality of first shutter units and the plurality of second shutter units block the light and the plurality of the light emission units, respectively. Each of which stops the irradiation of the light from the front surface of the surface light source, and when displaying the image by a plurality of the image display element units, a plurality of the first shutter units, respectively, The display is characterized in that the light is blocked, the plurality of second shutter portions respectively transmit the light, and the plurality of light emitting portions respectively emit the light from the front surface of the surface light source. apparatus. The display device according to claim 15,
In a case where the image is not displayed by the plurality of image display element units, the plurality of first shutter units and the plurality of second shutter units respectively transmit the light and the plurality of light emitting units. When the irradiation of the light from the front surface of the surface light source is stopped and the image is displayed by a plurality of the image display element units, a plurality of the first shutter units are respectively connected to the light. And a plurality of the second shutter portions each allow the light to pass therethrough, and a plurality of the light emitting portions respectively emit the light from the front surface of the surface light source. . The display device according to any one of claims 14 to 16,
A display device, wherein an interval between adjacent image display element portions is the same as or smaller than an interval between adjacent light emitting portions. The display device according to any one of claims 14 to 16,
When the barrier is disposed on the front side of the display panel, the interval between the adjacent image display element portions is the same as or wider than the interval between the adjacent optical element portions,
When the barrier is disposed between the display panel and the surface light source or on the back side of the surface light source, the interval between the adjacent image display element portions is the interval between the adjacent optical element portions. A display device characterized by being the same or narrower than the interval.

Images