JP2008134423A - Display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display apparatus functioning as room illumination in rationally cooperation with the lighting operation of a room lamp. <P>SOLUTION: The attitude angle of the display apparatus 100 is detected by an angle detecting unit 130, and whether the room lamp is turned on is detected by a light detecting unit 140. Whether or not the display apparatus 100 shields the illuminating light emitted from the room lamp is determined by a control unit 110 on the basis of the detection results by the units 130 and 140. When determined that the display apparatus 100 shields the light of the room lamp, the control unit 110 controls the display device 125 of the display apparatus 100 to emit light. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a display device having a function as an illumination lamp.

  2. Description of the Related Art In recent years, a rear seat entertainment (hereinafter referred to as “RSE”) system in which a passenger sitting in a rear seat of a vehicle enjoys images such as television broadcasting and DVD (Digital Versatile Disk) has become widespread. Due to the development of this RSE system, various types of display devices (hereinafter also simply referred to as “rear monitor devices”) that are visible to passengers sitting in the rear seats of vehicles have appeared.

  As an example of this rear monitor device, the display panel that hangs from the ceiling of the passenger compartment and projects the image is in a non-use posture in which the display panel is oriented substantially parallel to the ceiling surface of the passenger compartment, and a use posture in which the display panel is deployed downward There is an overhead type that is supported so as to be rotatable.

  In many cases, the overhead rear monitor device is hung at the approximate center of the ceiling of the passenger compartment corresponding to the approximate center of the front seat and the rear seat. A room light for illuminating the entire interior of the vehicle is also installed in the approximate center of the ceiling.

  In this way, two devices, an overhead type rear monitor device and a room light, are installed at a very close position in the approximate center of the ceiling of the passenger compartment. Since both are light emitters, depending on the installation position of both devices, there is a problem related to light interference, such as when the interior light is irradiated, the light enters the rear monitor device and hinders visual recognition. It was.

  As a rear monitor device capable of solving such problems, a technique has been proposed in which a display screen of the rear monitor device has a function as a room light and an in-vehicle display device is integrated with the room light (Patent Document 1, Patent Document 1). 2 etc .: hereinafter referred to as “conventional example”).

JP 2006-44567 A JP 2006-192972 A

  However, when the rear monitor device is attached later after purchasing the vehicle, the rear monitor device cannot be integrated with the indoor lamp already installed in the approximate center of the ceiling from the time of purchase of the vehicle, and the above-described conventional technology is applied. I can't.

  Further, when installing the rear monitor device after purchasing the vehicle, the rear monitor device is usually installed in the direction of the rear seat of the room light. For this reason, when the display panel is in the non-use posture folded to the ceiling side, the display panel blocks the irradiation light of the room light (see FIGS. 2B and 3B described later). This makes it impossible to achieve the purpose of the original room light such as indoor lighting at night. From the above, even when an in-vehicle display device is installed later after the purchase of a vehicle, a technology for making the functions of both the rear monitor device and the room light compatible is desired. Meeting this requirement is one of the problems to be solved by the present invention.

  This invention is made | formed in view of said situation, and it aims at providing the new display apparatus which can aim at cooperation with a room light rationally.

  The invention according to claim 1 is a display device arranged in the vicinity of the illumination means, the image display means for displaying an image on the display surface; the angle detection means for detecting the attitude angle of the display means; Light emission detection means for detecting light emission of the illumination means when it is determined that the screen display means blocks the light emitted by the illumination means based on the detection result by the angle detection means; And a light emission control means for causing the image display means to emit light from the display surface when light emission of the illumination determination means is detected by the means.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In the following description, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

[Constitution]
FIG. 1 is a block diagram illustrating a schematic configuration of an in-vehicle display device 100 that is a rear monitor device according to the present embodiment. This in-vehicle display device 100 executes an image display mode operation for displaying an image based on image data IMD from an external image signal source 500 and an illumination mode operation for performing an interior illumination operation while switching modes. Device.

  As shown in FIG. 1, the in-vehicle display device 100 includes a control unit 110 as a light emission control unit and a display unit 120 as an image display unit. The in-vehicle display device 100 includes an angle detection unit 130 as an angle detection unit and a light detection unit 140 as a light emission detection unit. Furthermore, the in-vehicle display device 100 includes a lighting command input unit 150 as command input means.

  Elements 120 to 150 other than the control unit 110 are connected to the control unit 110.

  The control unit 110 performs overall control of the entire in-vehicle display device 100. The control unit 110 will be described later.

  The display unit 120 includes (i) a display device 125 as display means, (ii) a display controller (not shown) that controls the entire display unit 120 based on the display image data OID sent from the control unit 110, (Iii) A display image memory (not shown) that stores display image data as necessary is provided.

  The display device 125 is a liquid crystal display device, and includes a liquid crystal display panel unit 126 and a backlight unit 127. Here, the backlight 127 includes, for example, a light source unit (not shown) using a light emitting diode (hereinafter also simply referred to as “LED”) as a light emitting unit, and a reflective film on the surface opposite to the liquid crystal display panel unit 126 side. And a light guide plate (not shown) formed. The backlight unit 127 is turned on or off according to the backlight control command BLC from the control unit 110.

  The light source unit of the backlight unit 127 includes, for example, an LED array in which a plurality of LEDs are arranged. When a backlight control command BLC is received from the control unit 110 that commands lighting in a state where operating power is supplied to the LED array, light is emitted toward the light guide plate. The light incident on the light guide plate travels in the light guide plate and is emitted from the light guide plate toward the liquid crystal display panel unit 126 after being reflected directly or by the reflection film. As a result, the liquid crystal display panel unit 126 is illuminated, and the image pattern on the liquid crystal display panel unit 126 based on the display image data OID becomes visible to the user.

  The angle detection unit 130 includes an angle sensor. The angle detection unit 130 detects an angle formed between the horizontal plane and the display surface of the liquid crystal display panel unit 126 of the in-vehicle display device 100. The detection result PAD by the angle detection unit 130 is sent to the control unit 110.

  The light detection unit 140 includes an optical sensor. The detection result ODD by the light detection unit 140 is sent to the control unit 110.

  The lighting command input unit 150 is configured to include, for example, a switch element that is turned on / off in response to a user operation. The command MIC from the lighting command input unit 150 is sent to the control unit 110.

  Here, the installation structure in the vehicle of the vehicle-mounted display apparatus 100 is demonstrated with reference to FIG.2 and FIG.3. Here, FIG. 2A shows a perspective view of the appearance when the in-vehicle display device 100 is in the image display mode posture, and FIG. 2B shows the illumination mode posture in the in-vehicle display device 100. The perspective view of the external appearance in the case of FIG. 3A shows a horizontal view of the appearance when the in-vehicle display device 100 is in the image display mode posture, and FIG. 3B shows the illumination mode posture in the in-vehicle display device 100. The horizontal view of the external appearance in the case of In FIGS. 2A to 3B, the XY plane is a horizontal plane.

  As comprehensively shown in FIGS. 2A to 3B, the in-vehicle display device 100 is suspended from a ceiling surface in the vehicle via a hinge member 610. The hinge member 610 is a joining member for attaching the in-vehicle display device 100 to the ceiling surface, and supports the in-vehicle display device 100 so as to be rotatable about an axis AX parallel to the X axis. For this reason, the user displays the in-vehicle display device 100 in an image display mode orientation (see FIGS. 2A and 3A) in which the display surface of the display device 125 has a large angle with the ceiling surface, or display. The display surface of the device 125 can be set to an illumination mode posture substantially parallel to the ceiling surface (see FIGS. 2B and 3B).

  In the case of the image display mode posture, the user of the rear seat of the vehicle can comfortably visually recognize the image on the display surface of the display device 125. Therefore, the user can enjoy a playback image of the video content displayed on the display surface of the display device 125. In the image display mode posture, the display surface of the display device 125 is positioned on the rear seat direction side with respect to the room light 620.

  In the illumination mode posture, the in-vehicle display device 100 (that is, the display device 125) covers the room light 620 as the illumination unit. In the illumination mode posture, the illumination light from the room light 620 is incident on the light detection unit in the in-vehicle display device 100.

  Returning to FIG. 1, the control unit 110 controls the display operation of the display unit 120 based on output information from the angle detection unit 130, the light detection unit 140, and the lighting command input unit 150.

  When the control unit 110 determines that the in-vehicle display device 100 is in the image display mode posture based on the detection result by the angle detection unit 130, the control command BLC indicating that the backlight unit 127 should be turned on. The image data IMD from the image signal source is sent to the display unit 120 as display image data OID. As a result, an image based on the image data IMD is displayed on the display surface of the display device 125.

  Further, when the control unit 110 determines that the in-vehicle display device 100 is in the retracted posture based on the detection result of the angle detection unit 130, for example, the illumination pattern data designating all pixels to be white is displayed on the display image. The data OID is sent to the display unit 120. When lighting is designated by the command MIC from the lighting command input unit 150, the control unit 110 sends a control command BLC indicating that the lighting should be performed to the backlight unit 127. As a result, the vehicle interior display device 100 illuminates the interior of the vehicle regardless of whether the interior light 620 is lit.

  When it is determined that the in-vehicle display device 100 is in the illumination mode posture and lighting is not specified by the command MIC from the lighting command input unit 150, the control unit 110 detects from the light detection unit 140. Based on the result, it is determined whether the interior light 620 is turned on or off, and on / off of the backlight unit 127 is controlled based on the determination result. In other words, when it is determined that the interior light 620 is lit, the control unit 110 sends a control command BLC to be lit to the backlight unit 127. On the other hand, if it is determined that the interior light 620 is turned off, the control unit 110 sends a control command BLC to the backlight unit 127 to turn it off. As a result, the in-vehicle illumination reflecting the lighting or extinguishing of the interior light 620 is performed by the in-vehicle display device 100.

[Operation]
Next, the operation of the in-vehicle display device 100 configured as described above will be described.

  For the operation of the in-vehicle display device 100, an “image display mode” for displaying video such as TV broadcast or DVD on the display device 125 and a white video to function as an interior light for illuminating the entire interior of the vehicle are displayed. There are two modes of “illumination mode” to be displayed.

  First, in step S <b> 11 of FIG. 4, the angle detection unit 130 detects an angle formed by the horizontal plane and the display surface of the liquid crystal display panel unit 126 of the in-vehicle display device 100. The detection result PAD by the angle detection unit 130 is sent to the control unit 110.

  Subsequently, in step S12, the control unit 110 determines whether or not the in-vehicle display device 100 is in the illumination mode attitude based on the detection result PAD from the angle detection unit 130. The angle threshold for determining whether or not the in-vehicle display device 100 is in the illumination mode posture is determined in advance based on prior experiments, simulations, or experiences. The angle threshold may be set by the user using an operation input unit (not shown) (for example, a touch panel provided on the display surface of the display device 125). it can.

  If the result of determination in step S12 is negative (step S12: N), the control unit 110 sends the illumination pattern data to the display unit 120 as display image data OID. Then, the process proceeds to step S18. In addition, the case where the result of determination is negative means that the vehicle-mounted display device 100 is in the image display mode posture state.

  In step S <b> 18, the vehicle-mounted display device 100 performs an “image display mode” operation that is a normal operation. That is, the control unit 110 sends a control command BLC indicating that the backlight unit 127 should be turned on, and sends the image data IMD from the image signal source 500 to the display unit 120 as display image data OID. As a result, an image based on the image data IMD is displayed on the display surface of the display device 125. Thereafter, the process returns to step S11.

  If the result of the determination in step S12 is affirmative (step S12: Y), the process proceeds to step S13. In addition, the case where the result of determination is affirmative means that the in-vehicle display device 100 is in the illumination mode posture state.

  In step S <b> 13, the control unit 110 determines whether or not a lighting command has been issued by the lighting command input unit 150. If the result of this determination is affirmative (step S13: Y), the process proceeds to step S16. In step S <b> 16, the interior lighting by the light emission of the display device 125 is performed. When executing such interior lighting, the control unit 110 sends a control command BLC to the backlight unit 127 to light up. Thereafter, the process returns to step S11.

  If the determination in step S13 is negative (step S13: N), the process proceeds to step S14. In step 14, the light detection unit 140 detects the light emitted from the room light 620. The detection result ODD by the light detection unit 140 is sent to the control unit 110.

  Subsequently, in step S15, the control unit 110 determines whether or not the room light 620 is lit based on the detection result ODD by the detection unit 140. In addition, in order to determine whether or not the room light 620 is turned on, the light intensity threshold is determined in advance based on prior experiments, simulations, or experiences. As for the luminous intensity threshold, as in the case of the angle threshold described above, the user uses an operation input unit (not shown) (for example, a touch panel provided on the display surface of the display device 125). It can also be set.

  If the result of the determination in step S15 is affirmative (step S15: Y), the process proceeds to step S16. Here, the case where the result of the determination is affirmative is a state in which the in-vehicle display device 100 is in the illumination mode posture and the room light 620 is lit. In other words, the in-vehicle display device 100 blocks the irradiation light of the room light 620 and cannot perform the function as an original room light such as night room lighting.

  In step S16, the above-described operation is performed. Thereafter, the process returns to step S11.

  On the other hand, when the result of the determination in step S15 is negative (step S15: N), the process proceeds to step S17. Here, the case where the result of the determination is negative is a state where the in-vehicle display device 100 is in the illumination mode posture and the room light 620 is turned off. In other words, there is no need to illuminate the interior with a room light.

  In this step S17, since it is not necessary to illuminate the inside of the vehicle, the display device 125 does not emit. That is, in step S <b> 17, the control unit 110 sends a control command BLC indicating that the backlight unit 127 should be turned off. Thereafter, the process returns to step S11.

  When the process returns to step S11 as described above, the processes of steps S11 to S18 described above are repeated thereafter.

  As described above, in the present embodiment, even when the in-vehicle display device 100 covers the room light 620, the in-vehicle display device 100 functions as an illumination lamp. Therefore, according to the in-vehicle display device 100 of the present embodiment, it is possible to execute the function of the interior lighting while rationally coordinating with the illumination operation of the interior light 620, thereby improving the convenience for the user. Can be made.

  In addition, the in-vehicle display device 100 according to the present embodiment is installed on the rear seat direction side with respect to the room light 620. Therefore, a comfortable RSE system can be provided without the light from the room light 620 entering the display device 125 of the in-vehicle display device 100 and hindering visual recognition.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiment, and various modifications are possible.

  For example, in the present embodiment, the display device 125 in the display unit 120 is a liquid crystal display device including the liquid crystal display panel unit 126. However, as a display device, an organic EL (Electro Luminescence) panel, a PDP (Plasma Display Panel), or the like is used. Can also be adopted.

  In addition, as the angle sensor in the above-described embodiment, any sensor such as a magnetic sensor, a distance sensor, and a push switch may be used as long as it can detect an angle or an illumination mode posture.

  In the above embodiment, the hinge member 610 as a support member is prepared separately from the in-vehicle display device 100. On the other hand, you may make it provide a dedicated support member as a vehicle-mounted display apparatus. In this case, an angle detection unit can be disposed on the support member.

  In the above embodiment, in order to determine whether or not the indoor lamp 620 is lit, the light emitted from the indoor lamp is detected. The electrical signal shown may be received.

  Moreover, in said embodiment, although the color of the illumination light by the vehicle-mounted display apparatus 100 was white, it can be set as arbitrary colors.

  In the embodiment described above, the rotation operation of the in-vehicle display device 100 is manual. However, the rotation operation may be an electric operation using a remote control or the like.

  In the in-vehicle display device 100 of the above-described embodiment, the image signal source 500 is arranged in the in-vehicle display device 100. However, a drive unit that can insert and remove a DVD or the like as the image signal source is provided. Also good.

  In the above embodiment, the present invention is applied to the in-vehicle display device. However, it is needless to say that the present invention can be applied to a display device mounted on a moving body other than a vehicle.

  Note that a part or all of the control unit 110 in the above embodiment includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and the like. The computer may be configured as a computing unit provided, and a part of or all of the processing in the above embodiment may be executed by executing a program prepared in advance on the computer. This program is recorded on a computer-readable recording medium such as a hard disk, CD-ROM, or DVD, and is read from the recording medium and executed by the computer. The program may be acquired in a form recorded on a portable recording medium such as a CD-ROM or DVD, or may be acquired in a form of delivery via a network such as the Internet. Also good.

It is a functional block diagram which shows roughly the structure of the vehicle-mounted display apparatus which concerns on one Embodiment of this invention. 1 is a perspective view showing an appearance of an in-vehicle display device that is an embodiment of the present invention. It is a horizontal view which shows the external appearance of the vehicle-mounted display apparatus which is one Embodiment of this invention. It is a flowchart for demonstrating operation | movement of the apparatus of FIG.

Explanation of symbols

100: In-vehicle display device (display device)
110... Control unit (light emission control means, receiving means)
120 ... Display unit (image display means)
130... Angle detection unit (angle detection means)
140... Light detection unit (light emission detection means, light detection means)
610 ... Hinge member (supporting means)
620 ... Interior light (lighting means)

Claims (6)

A display device rotatably disposed near the illumination means,
Image display means for displaying an image on the display surface;
Angle detection means for detecting the attitude angle of the image display means;
A light emission detection means for detecting the light emission of the illumination means when it is determined that the image display means blocks the light emitted by the illumination means based on the detection result by the angle detection means;
Light emission control means for causing the image display means to emit light from the display surface when light emission of the illumination means is detected by the light emission detection means;
A display device comprising:   The display device according to claim 1, wherein the light emission detection unit includes a light detection unit configured to detect light from the illumination unit.   The light emission detection unit includes a reception unit that receives a state display signal from the illumination unit, which is an electrical signal indicating whether the illumination unit is in a light emission state or a non-light emission state. The display device according to 1.   The display device according to claim 1, further comprising a support unit that is attached in the vicinity of the illumination unit and rotatably supports the image display unit.   Based on the detection result by the angle detection means, when it is determined that the image display means blocks the light emitted by the illumination means, the detection result by the light emission detection means for the light emission control means. 5. The display device according to claim 1, further comprising command input means for instructing the image display means to emit light from the display surface.   The display device according to claim 1, wherein the display device is mounted on a moving body.

Images