JP2008299231A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device which shares a light source and has a simple constitution. <P>SOLUTION: Control is performed so that the light source 27 included on a housing 2 emits light in a closed state; a liquid crystal panel 13 included on a housing 1 displays an image; and a liquid crystal panel 23 included on the housing 2 becomes transmissive for the whole light. The light from the light source 27 is transmitted from an external display window 12 to the external part through the liquid crystal panel 13 which displays an image. Further, the light source 27 emits light in the closed state and the liquid crystal panel 23 displays the image. The light from the light source 27 is transmitted from an external display window 21 to the external part through the liquid crystal panel 23 which displays the image. Accordingly, light sources for displaying images on the side of the display window 21 and the side of the display window 12 can share the one light source 27 and, as the result, the display device having a simple constitution is attained. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device, and more particularly to a display device having two housings that are coupled so that their positional relationship can be changed.

  Patent Document 1 discloses a liquid crystal display device capable of double-sided display. Specifically, the liquid crystal display device includes a liquid crystal panel and light sources arranged on both sides of the liquid crystal panel. When one light source emits light, the user can view an image displayed on the liquid crystal panel from the opposite side of the light source with respect to the liquid crystal panel. Since the light sources are arranged on both sides of the liquid crystal panel, the user can view images from both sides of the liquid crystal panel.

  And this liquid crystal display device is mounted in one case among the foldable mobile phones in which two cases are rotatably coupled.

JP 2005-92046 A

  However, since the liquid crystal display device described in Patent Document 1 includes light sources on both sides of the liquid crystal panel, the liquid crystal display device becomes large in size and has a complicated structure when mounted on one casing of a folding mobile phone. This has led to an increase in the size of mobile terminals.

  Accordingly, an object of the present invention is to provide a display device having a simple configuration sharing a light source.

  A first aspect of a display device according to the present invention includes a first liquid crystal panel, the first liquid crystal panel can be viewed from one side, and light is transmitted from the outside to the other side of the first liquid crystal panel. And a first liquid crystal panel and a light source that face each other in a predetermined direction, and the light source does not face the first liquid crystal panel via the second liquid crystal panel. And the second positional relationship in which the light source faces the first liquid crystal panel from the other side via the second liquid crystal panel in the predetermined direction. And a second housing that is employed.

  According to a second aspect of the display device of the present invention, the first liquid crystal panel and the first liquid crystal panel are opposed to each other in a predetermined direction and transmit light in the direction, and are perpendicular to the direction. A light guide plate that guides light in a direction, and a light emitting element provided at an end of the light guide plate, wherein the first liquid crystal panel can be viewed from the light guide plate side, and the first liquid crystal panel can be viewed from the outside opposite to the light guide plate. A first casing that transmits light to the liquid crystal panel, a second liquid crystal panel and a reflector that face each other, and the first liquid crystal panel does not face the second liquid crystal panel. The first housing has a positional relationship and a second positional relationship in which the light guide plate is opposed to the reflection plate via the first liquid crystal panel and the second liquid crystal panel in the predetermined direction. And a second housing that is employed.

  According to the first aspect of the display device of the present invention, when the first positional relationship is adopted by the light from the same light source, the second liquid crystal panel is moved from the side opposite to the light source from the second side. When the positional relationship is adopted, it can be visually recognized from one side of the first liquid crystal panel.

  According to the second aspect of the display device of the present invention, when the first positional relationship is adopted by the light from the same light source, the first liquid crystal panel is When the positional relationship is adopted, the second liquid crystal panel can be visually recognized from the light guide plate side.

  Embodiments according to the present invention will be described below with reference to the drawings as appropriate. In addition, the same code | symbol points out the same or an equivalent part, and the description which overlaps is abbreviate | omitted.

(Embodiment 1)
A display device according to a first embodiment of the present invention will be described. Examples of the display device include a portable game machine, a mobile phone, and a portable information device. 1 and 2 are conceptual external perspective views of the display device according to the first embodiment. FIG. 1 shows a state where the display device is closed (closed state), and FIG. 2 shows a state where the display device is opened (open state).

  The display device includes a housing 1, a housing 2, and a hinge 3. The housing 1 and the housing 2 are coupled so that the relative position can be changed. Specifically, the housing 1 and the housing 2 are coupled to each other by a hinge 3 so as to be rotatable. In addition, the hinge 3 is not necessarily an essential requirement, and other modes may be used.

  The housing 1 includes an external display window 12 and a display window 11. The housing 2 includes a display window 21.

  The display window 11 is provided on the housing 1 on the surface on the housing 2 side in the closed state, and the display window 21 is provided on the housing 2 on the surface on the housing 1 side in the closed state. That is, in the closed state, the display windows 11 and 21 face each other in a predetermined direction (direction Z in FIGS. 1 and 2, hereinafter referred to as direction Z).

  The external display window 12 is provided in the housing 1 on the surface opposite to the display window 11.

  3 is a conceptual configuration diagram of a z′-z ″ cross section of the display device shown in FIG. 1. The housing 1 includes a liquid crystal panel 13 inside. The housing 2 includes a liquid crystal panel 23 and a liquid crystal panel 23. The light source 27 and the reflection panel 25 are provided therein, and the hinge 3 is omitted in Fig. 3, and the same applies to other drawings referred to below.

  The liquid crystal panel 13 is disposed between the display window 11 and the external display window 12 so as to face them. The casing 1 can visually recognize the liquid crystal panel 13 from the external display window 12 side, and can transmit light to the liquid crystal panel 13 through the display window 11 from the outside.

  Although the configuration of the liquid crystal panel 13 will not be described in detail, a simple configuration and function will be described. The liquid crystal panel 13 is composed of a liquid crystal sandwiched between two transparent substrates and has a plurality of pixels. A voltage is applied to the liquid crystal according to each pixel, and the transmittance is controlled by controlling the polarization state of light passing through the pixel, thereby displaying an image.

  The liquid crystal panel 23, the light source 27, and the reflection panel 25 are arranged in this order in the direction Z from the display window 21 and face each other. 2, it can be understood that the open state is a state where the liquid crystal panel 13 and the liquid crystal panel 23 do not face each other, and the closed state is a state where the light source 27 is liquid crystal in a predetermined direction Z with reference to FIG. It can be grasped that the liquid crystal panel 13 is opposed to the panel 23.

  Similarly to the liquid crystal panel 13, the liquid crystal panel 23 displays an image by controlling the transmittance of light passing therethrough.

  The light source 27 emits light to at least the display window 21 side. For example, the light source 27 includes an LED 26 and a light guide plate 24. The LED 26 is provided on an end surface of the light guide plate 24 in a direction substantially perpendicular to the direction Z. The light guide plate 24 opposes the liquid crystal panel 23 in the direction Z, transmits light in the direction Z, and guides the light in a direction perpendicular to the direction Z. Specifically, light incident from the reflection panel 25 side or the liquid crystal panel 23 side is transmitted, and at least a part of the light emitted from the LED 26 is guided to the display window 21 side for surface emission.

  The reflection panel 25 reflects light incident from the light source 27 toward the light source 27. Note that the reflective panel 25 faces the liquid crystal panel 13 via the liquid crystal panel 23 and the light guide plate 24 in the direction Z in the closed state. In Embodiment 1, the reflection panel 25 is not an essential requirement, but the luminance of the image can be improved as will be described later.

  The liquid crystal panels 13 and 23 and the light source 27 are controlled by, for example, the control unit 100 as shown in FIG. The control unit 100 may be provided in either of the casings 1 and 2. For example, the function of controlling the liquid crystal panel 13 is divided into the casing 1, and the function of controlling the liquid crystal panel 23 and the light source 27 is divided into the casing 2. May be provided.

  Next, the operation of the control unit 100 when the display device displays an image will be described. Specifically, a case where an image is displayed on the external display window 12 side in the closed state and a case where an image is displayed on the display window 21 side in the open state will be described. FIG. 5 is a flowchart showing the operation of the control unit 100.

  First, in step S11, the control unit 100 determines whether the display device is in an open state or a closed state. This determination is performed by recognizing the conduction state of a mechanical switch that conducts only in the closed state, for example.

  When it is determined in step S11 that it is in the closed state (that is, when an image is displayed on the external display window 12), in step S12, the control unit 100 emits the light source 27 (more specifically, the LED 26). To control.

  In step S <b> 13, the control unit 100 controls to display a desired image by applying a desired voltage to each pixel of the liquid crystal panel 13.

  In step S <b> 14, the control unit 100 controls the liquid crystal panel 23 by applying a predetermined voltage to each pixel so that the liquid crystal panel 23 is fully transmissive (maximum transmittance). If the liquid crystal panel 23 transmits all light when no voltage is applied, no voltage is applied to the liquid crystal panel 23.

  Note that execution of steps S12 to S14 may be performed simultaneously or before and after each other. That is, all of steps S12 to S14 may be executed within a predetermined period.

  Next, the path of light from the light source 27 when the control unit 100 executes steps S12 to S14 will be described with reference to FIG. FIG. 6 is a diagram in which the path of light from the light source 27 is added to the configuration diagram of FIG.

  A part of the light emitted from the LED 26 is guided to the display window 21 side (for example, refer to the path A) by the light guide plate 24, and the liquid crystal panel 23, the display windows 21 and 11, the liquid crystal panel 13, and the external display window 12 in this order. Is transmitted to outside.

  Thus, the light from the light source 27 passes through the liquid crystal panel 13 for displaying an image and is transmitted from the external display window 12 to the outside, so that the user can view the image through the external display window 12.

  Further, another part of the light emitted from the LED 26 is guided from the light guide plate 24 to the reflection panel 25 side (for example, refer to the path B) and reflected by the reflection panel 25 to the light source 27 side. The reflected light is transmitted to the outside through the light guide plate 24, the liquid crystal panel 23, the display windows 21 and 11, the liquid crystal panel 13, and the external display window 12 in this order. That is, the amount of light transmitted from the external display window 12 via the liquid crystal panel 13 for displaying an image is increased by the reflection panel 25, so that the brightness of the image via the external display window 12 can be improved.

  Referring to FIG. 5 again, when it is determined in step S11 that the switch is in the open state, in step S15, control unit 100 controls light source 27 (more specifically, LED 26) to emit light.

  In step S16, the control unit 100 controls the liquid crystal panel 23 to display a desired image.

  Note that the execution of steps S15 and S16 may be performed simultaneously or before and after each other. That is, steps S15 and S16 may be executed within a predetermined period.

  Next, the path of light from the light source 27 when the control unit 100 executes steps S15 and S16 will be described with reference to FIG. FIG. 7 is a diagram in which a light path from the light source 27 is added to the conceptual configuration diagram of the z′-z ″ cross section in FIG. 2.

  A part of the light emitted from the LED 26 is guided to the display window 21 side (see, for example, the path C) by the light guide plate 24 and is transmitted to the outside through the liquid crystal panel 23 and the display window 21 in this order.

  In this way, the light from the light source 27 passes through the liquid crystal panel 23 that displays an image and is transmitted from the display window 21 to the outside, so that the user can view the image through the display window 21.

  Further, another part of the light emitted from the LED 26 is guided from the light guide plate 24 to the reflection panel 25 side (see, for example, the path D) and reflected by the reflection panel 25 to the light source 27 side. The reflected light is transmitted to the outside through the light guide plate 24, the liquid crystal panel 23, and the display window 21 in this order. Therefore, the amount of light transmitted from the display window 21 via the liquid crystal panel 23 that displays an image is increased by the reflection panel 25, so that the brightness of the image through the display window 21 can be improved.

  As described above, using the same light source 27 on the housing 2 side, an image can be viewed from the display window 21 side in the open state, and an image can be viewed from the external display window 12 side in the closed state. That is, the light source for displaying an image on the display window 21 side and the external display window 12 side can be shared by one light source 27. Therefore, a display device can be realized with a simple configuration, thereby contributing to downsizing of the display device.

  In the display device, an image can be displayed on the display window 11 side and the external display window 12 side in the open state. In addition, the control unit 100 can recognize which display window the image is displayed in the open state by, for example, a user input via an operation unit (not shown). Or when a touch sensor panel is employ | adopted for the display windows 11, 21, etc., the control part 100 may recognize by those operation inputs.

  More specifically, instead of steps S15 and S16, the control unit 100 controls the liquid crystal panel 13 to display a desired image.

  At this time, for example, external light such as sunlight or room light is transmitted to the outside through the external display window 12, the liquid crystal panel 13, and the display window 11 in this order (see, for example, path E in FIG. 7). As described above, since the external light passes through the liquid crystal panel 13 that displays an image and is transmitted to the outside through the display window 11, the user can view the image through the display window 11.

  External light is transmitted to the outside through the display window 11, the liquid crystal panel 13, and the external display window 12 in this order (see, for example, path F in FIG. 7). As described above, since the external light passes through the liquid crystal panel 13 that displays an image and is transmitted to the outside through the external display window 12, the user can view the image through the external display window 12.

  In general, external light incident from the side visually recognized by the user has higher luminance than external light incident from the side opposite to the user, so that, for example, when the display window 11 is mainly used, liquid crystal A semi-transmissive panel 15 (semi-transmissive reflector: indicated by a broken line in FIG. 7) may be disposed between the panel 13 and the external display window 12. In this case, external light with high luminance is partially reflected by the transflective panel 15 after passing through the display window 11 and the liquid crystal panel 13, and is transmitted to the outside again through the liquid crystal panel 13 and the display window 11. Therefore, the brightness of the image on the display window 11 can be improved.

  In the present embodiment, the liquid crystal panel 13 displays an image in step S13 and the liquid crystal panel 23 is controlled to transmit all light in step S14. However, in step S13, the liquid crystal panel 13 is controlled. May be controlled to transmit all light, and in step S14, the liquid crystal panel 23 may be controlled to display a desired image.

  Further, the liquid crystal panel 13 may be controlled to display a desired image in step S13, and the liquid crystal panel 23 may be controlled to display a desired image in step S14. Even in this case, the light from the light source 27 is transmitted to the outside through the external display window 12 through the liquid crystal panels 13 and 23 (see FIG. 6). At this time, for example, the liquid crystal panel 13 is controlled to display a first image (for example, an arbitrary background image), and the liquid crystal panel 23 is controlled to display a second image (for example, a clock display image). In this case, the user can view an image in which the first image and the second image are superimposed (for example, an image in which a background image and a clock display image are superimposed) via the external display window 12.

  Therefore, the first image and the second image can be optically superimposed and displayed without superimposing the first image data and the second image data by electronic calculation processing. As a result, the arithmetic circuit can be simplified.

(Embodiment 2)
A display device according to the second embodiment of the present invention will be described. The conceptual external perspective view of the display device according to Embodiment 2 is the same as FIGS.

  8 is a conceptual configuration diagram of a z′-z ″ section of the display device shown in FIG. 1. The housing 1 includes a liquid crystal panel 13, a transflective panel 15, and a light source 17 therein. The housing 2 includes a liquid crystal panel 23 and a reflection panel 25 therein.

  The light source 17 is disposed between the external display window 12 and the liquid crystal panel 13 and emits light to at least the liquid crystal panel 13 side. For example, the light source 17 includes an LED 16 and a light guide plate 14. The LED 16 is provided on an end surface of the light guide plate 14 in a direction substantially perpendicular to the direction Z. The light guide plate 14 is opposed to the liquid crystal panel 13 in the direction Z, transmits light in the direction Z, and guides light in a direction perpendicular to the direction Z. Specifically, the light guide plate 14 transmits light incident from the liquid crystal panel 13 side or the external display window 12 side (translucent panel 15 side described later), and at least part of the light emitted from the LED 16 is liquid crystal. The panel 13 is led to emit light.

  The transflective panel 15 is disposed between the light source 17 and the external display window 12 and faces each other in the direction Z. The transflective panel 15 is a transmissive reflector. Specifically, a part of the light incident from the light source 17 side is reflected to the light source 17 side (that is, the liquid crystal panel 13 side), and the remaining part is transmitted to the external display window 12 side.

  2, it can be understood that the open state is a state where the liquid crystal panel 13 and the liquid crystal panel 23 do not face each other, and the closed state is a state where the light guide plate 14 is in the direction Z with reference to FIG. 13 and the liquid crystal panel 23, it can be grasped that it is in a state of facing the reflection panel 25.

  The liquid crystal panels 13 and 23 and the light source 17 are controlled by, for example, the control unit 101 as shown in FIG. The control unit 101 may be provided in any of the casings 1 and 2. For example, the function for controlling the liquid crystal panel 13 and the light source 17 is divided into the casing 1, and the function for controlling the liquid crystal panel 23 is divided into the casing 2. May be provided.

  Next, the operation of the control unit 101 when the display apparatus displays an image will be described. Specifically, a case where an image is displayed on the external display window 12 side in the closed state and a case where an image is displayed on the display window 11 side in the open state will be described. FIG. 10 is a flowchart showing the operation of the control unit 101.

  First, in step S21, the control unit 101 determines whether the display device is in an open state or a closed state. This determination is made by, for example, an open state or a closed state by a mechanical switch that conducts only in the closed state.

  When it is determined in step S21 that it is in the closed state (that is, when an image is displayed on the external display window 12), the control unit 101 emits the light source 17 (more specifically, the LED 16) in step S22. To control.

  In step S <b> 23, the control unit 101 controls to display a desired image by applying a desired voltage to each pixel of the liquid crystal panel 13.

  In step S24, the control unit 101 controls the liquid crystal panel 23 by applying a predetermined voltage to each pixel so that the liquid crystal panel 23 is fully transmissive (maximum transmittance). If the liquid crystal panel 23 transmits all light when no voltage is applied, no voltage is applied to the liquid crystal panel 23.

  Note that the execution of steps S22 to S24 may be performed simultaneously or before and after each other. That is, all of steps S22 to S24 may be executed within a predetermined period.

  Next, the path of light from the light source 17 when the control unit 101 executes steps S22 to S24 will be described with reference to FIG. FIG. 11 is a diagram in which the path of light from the light source 17 is added to the configuration diagram of FIG.

  A part of the light emitted from the LED 16 is guided to the liquid crystal panel 13 side (for example, see the path G) by the light guide plate 14. Then, after passing through the liquid crystal panel 13, the display windows 11 and 21, and the liquid crystal panel 23 in this order, the light is reflected by the reflection panel 25, and again, the liquid crystal panel 23, the display windows 21 and 11, the liquid crystal panel 13, the light guide plate 14, and the semi-transmissive The panel 15 and the external display window 12 are transmitted to the outside through this order. A part of the light incident on the transflective panel 15 is transmitted to the outside through the external display window 12.

  Further, another part of the light emitted from the LED 16 is guided by the light guide plate 14 to the transflective panel 15 side (for example, refer to the path H), and a part of the guided light is further transmitted by the transflective panel 15. Reflected toward the light source 17 side. Then, the light is guided to the liquid crystal panel 13 side through the light guide plate 14 and transmitted to the outside through the external display window 12 in the same manner as the path E. The transflective panel 15 is not an essential requirement, but can improve the brightness of an image on the display window 11 side described later.

  That is, since the light from the light source 17 passes through the liquid crystal panel 13 that displays an image, the user can view the image through the external display window 12. In the second embodiment, the reflection panel 25 is an essential requirement.

  Referring to FIG. 10 again, if it is determined in step S21 that it is in the open state, in step S25, control unit 101 controls light source 17 (more specifically, LED 16) to emit light.

  In step S26, the control unit 101 controls the liquid crystal panel 13 to display a desired image.

  Note that the execution of steps S25 and S26 may be performed simultaneously or before and after each other. That is, steps S25 and S26 may be executed within a predetermined period.

  Next, the path of light from the light source 17 when the control unit 101 executes steps S25 and S26 will be described with reference to FIG. FIG. 12 is a diagram in which a light path from the light source 17 is added to the conceptual configuration diagram of the z′-z ″ cross section in FIG. 2.

  Part of the light emitted from the LED 16 is guided to the display window 11 side (for example, the path I) by the light guide plate 14, and is transmitted to the outside through the liquid crystal panel 13 and the display window 11 for displaying an image. . Therefore, the user can view the image through the display window 11.

  Further, another part of the light emitted from the LED 16 is guided to the semi-transmissive panel 15 side (for example, the path J) by the light guide plate 14, and part of the light is reflected to the light source 27 side by the semi-transmissive panel 15. The Then, similarly to the path G, the image is transmitted to the outside through the liquid crystal panel 13 and the display window 11 for displaying an image. Therefore, the brightness of the image displayed on the display window 11 side can be improved by the translucent panel 15.

  As described above, using the same light source 17 on the housing 1 side, an image can be viewed from the display window 11 side in the open state, and an image can be viewed from the external display window 12 side in the closed state. That is, the light source for displaying images on the display window 11 side and the external display window 12 side can be shared by one light source 17. Therefore, a display device can be realized with a simple configuration, thereby contributing to downsizing of the display device.

  In the display device, an image can be displayed on the display window 21 side and the external display window 12 side in the open state. Note that the control unit 101 can recognize which display the image is displayed in in the open state by, for example, a user input via an operation unit (not shown). Or when a touch sensor panel is employ | adopted for the display windows 11, 21, etc., the control part 101 may recognize by those operation inputs.

  For example, when displaying an image on the display window 21 side, the control unit 101 controls the liquid crystal panel 23 to display a desired image instead of steps S25 and S26.

  At this time, for example, outside light such as sunlight or room light passes through the display window 21 and the liquid crystal panel 23, is reflected by the reflecting plate 25, and is transmitted to the outside again through the liquid crystal panel 13 and the display window 21. (For example, see route K in FIG. 12). As described above, since the external light passes through the liquid crystal panel 23 that displays an image and is transmitted to the outside through the display window 21, the user can view the image through the display window 21.

  When displaying an image on the external display window 12 side, the control unit 101 controls the liquid crystal panel 14 to display a desired image instead of steps S25 and S26. External light is transmitted to the outside through the display window 11, the liquid crystal panel 13, the light guide plate 14, the transflective panel 15, and the external display window 12 in this order (see, for example, path F in FIG. 12). As described above, since the external light passes through the liquid crystal panel 13 that displays an image and is transmitted to the outside through the external display window 12, the user can view the image through the external display window 12.

  Note that the housing 2 may further include the light source 27 described in Embodiment 1, and the control unit 101 may further have a function of controlling the light source 27. At this time, the control unit 101 executes steps S15 and S16 shown in FIG. 5 so that an image can be displayed on the display window 21 side in the open state using the light source 27. At this time, the control unit 101 may execute steps S12 to S14 instead of steps S22 to S24 in order to display an image on the external display window 12 side.

  In the second embodiment, similarly to the first embodiment, the liquid crystal panel 13 is controlled to transmit all light in steps S23 and S24, and the liquid crystal panel 23 is controlled to display an image. Alternatively, both the liquid crystal panels 13 and 23 may be controlled to display images in steps S23 and S24.

1 is a conceptual external perspective view of a display device according to Embodiments 1 and 2. FIG. 1 is a conceptual external perspective view of a display device according to Embodiments 1 and 2. FIG. 3 is a conceptual cross-sectional view of the display device in a closed state according to Embodiment 1. FIG. 3 is a conceptual functional block diagram of an electronic circuit of a display device in Embodiment 1. FIG. 3 is a flowchart showing the operation of the control unit 100. FIG. 4 is a diagram in which a light path from a light source 27 is added to the cross-sectional view of FIG. 3. 3 is a diagram in which a light path from a light source 27 is added to the conceptual cross-sectional view of the display device in an open state according to Embodiment 1. FIG. 10 is a conceptual cross-sectional view of a display device in a closed state according to Embodiment 2. FIG. 6 is a conceptual functional block diagram of an electronic circuit of a display device in Embodiment 2. FIG. 3 is a flowchart showing the operation of the control unit 101. FIG. 9 is a diagram in which a light path from a light source 17 is added to the cross-sectional view of FIG. 8. FIG. 6 is a diagram in which a light path from a light source 17 is added to a conceptual cross-sectional view of a display device in an open state according to a second embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 2 Case, 11, 21 Display window, 12 External display window, 13, 23 Liquid crystal panel, 14, 24 Light guide plate, 15 Transflective panel, 25 Reflective panel, 16, 26 LED, 17, 27 Light source.

Claims (6)

A first housing that has a first liquid crystal panel, the first liquid crystal panel is visible from one side, and transmits light from the outside to the other side of the first liquid crystal panel;
A second liquid crystal panel and a light source facing each other in a predetermined direction, wherein the light source does not oppose the first liquid crystal panel via the second liquid crystal panel; A second positional relationship in which the light source faces the first liquid crystal panel from the other side through the second liquid crystal panel in a direction is adopted for the first casing. A display device comprising a housing. The light source is
A light guide plate that faces the first liquid crystal panel when the second positional relationship is adopted, transmits light along the predetermined direction, and guides the light in a direction perpendicular to the direction;
A light emitting element provided at an end of the light guide plate,
The second housing is
2. The display device according to claim 1, further comprising a reflecting plate facing the first liquid crystal panel via the light guide plate when the second positional relationship is adopted. A first liquid crystal panel;
A light guide plate that opposes the first liquid crystal panel in a predetermined direction, transmits light in the direction, and guides the light in a direction perpendicular to the direction;
A light-emitting element provided at an end of the light guide plate, the first liquid crystal panel can be viewed from the light guide plate side, and light is transmitted from the outside opposite to the light guide plate to the first liquid crystal panel. 1 housing,
A first liquid crystal panel having a second liquid crystal panel and a reflecting plate facing each other, wherein the first liquid crystal panel is not opposed to the second liquid crystal panel; and the light guide plate in the predetermined direction is the first liquid crystal panel. A second positional relationship opposite to the reflector via the first liquid crystal panel and the second liquid crystal panel, and a second housing adopted for the first housing. apparatus. The first housing is
4. The display device according to claim 3, further comprising a semi-transmissive reflecting plate facing the first liquid crystal panel via the light guide plate in the predetermined direction.   The display device according to claim 1, wherein the first liquid crystal panel or the second liquid crystal panel displays a predetermined image when the second positional relationship is adopted.   The display device according to claim 1, wherein the first liquid crystal panel and the second liquid crystal panel display a predetermined image when the second positional relationship is adopted.

Images