WO2009130865A1 - Image display device and image display device backlight control method - Google Patents

Image display device and image display device backlight control method Download PDF

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Publication number
WO2009130865A1
WO2009130865A1 PCT/JP2009/001751 JP2009001751W WO2009130865A1 WO 2009130865 A1 WO2009130865 A1 WO 2009130865A1 JP 2009001751 W JP2009001751 W JP 2009001751W WO 2009130865 A1 WO2009130865 A1 WO 2009130865A1
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WO
WIPO (PCT)
Prior art keywords
image display
display device
backlight
brightness
information
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PCT/JP2009/001751
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French (fr)
Japanese (ja)
Inventor
古谷貴之
東田真明
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パナソニック株式会社
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Publication of WO2009130865A1 publication Critical patent/WO2009130865A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D11/00—Passenger or crew accommodation; Flight-deck installations not otherwise provided for
    • B64D11/0015—Arrangements for entertainment or communications, e.g. radio, television
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D11/00—Passenger or crew accommodation; Flight-deck installations not otherwise provided for
    • B64D11/0015—Arrangements for entertainment or communications, e.g. radio, television
    • B64D11/00151—Permanently mounted seat back monitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • B60R11/0229—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for displays, e.g. cathodic tubes
    • B60R11/0235—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for displays, e.g. cathodic tubes of flat type, e.g. LCD
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2380/00—Specific applications
    • G09G2380/12—Avionics applications
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source

Definitions

  • the present invention relates to an image display device mounted on a passenger moving body such as an aircraft or a train, and a backlight control method for the image display device.
  • IFE In-Flight Entertainment
  • a passenger views content such as a movie or music on a liquid crystal display disposed on the back of the front seat, and listens to sound using headphones connected to the armrest of the seat.
  • a system is also provided that allows users to select AV content, play games, and receive Internet connection services using a remote control for operation called a handset provided on the armrest of each seat. Has been.
  • the method of detecting the ambient brightness with a sensor and adjusting the amount of light (brightness) of the backlight according to the detection result has the following problems.
  • the direction of the light radiated to the screen is almost fixed (for example, indoor lighting). Can be set.
  • An image display apparatus is an image display apparatus having a backlight installed in a passenger moving body's passenger cabin, and provides environmental information of the passenger moving body that affects the brightness of the display screen of the image display apparatus.
  • the environment information acquisition unit to acquire, the environment information analysis unit that analyzes the acquired environment information and estimates the brightness on the display screen, and calculates the backlight brightness from the brightness of the display screen estimated by the environment information analysis unit
  • a backlight luminance setting unit that sets the luminance of the backlight based on the calculated value of the backlight luminance calculating unit.
  • the brightness of the backlight is controlled based on information related to the usage environment of the image display device, so that, for example, in the display screen of the image display device in an aircraft, regardless of changes in the usage environment of the image display device. Visibility can be maintained well.
  • a backlight control method for an image display device is a backlight control method for an image display device having a backlight installed in a passenger cabin of a passenger moving body, the brightness of the display screen of the image display device being adjusted.
  • An environmental information acquisition step for acquiring environmental information of an impacting passenger vehicle, an environmental information analysis step for analyzing the acquired environmental information and estimating brightness on the display screen, and a display screen estimated by the environmental information analysis step
  • a backlight luminance calculating step for calculating the luminance of the backlight from the brightness of the backlight, and a backlight luminance setting step for setting the luminance of the backlight based on the calculated value of the backlight luminance calculating step.
  • FIG. 1 is a plan view showing an installation environment of an image display apparatus according to an embodiment of the present invention.
  • FIG. 2 is a plan view showing details of the installation environment of the image display apparatus according to the embodiment of the present invention.
  • FIG. 3 is a main layout diagram showing the configuration of the image display device and the content distribution system in the embodiment of the present invention.
  • FIG. 4 is a basic configuration diagram showing components of the seat row in which the image display device according to the embodiment of the present invention is installed.
  • FIG. 5 is a perspective view of the image display device for explaining an optical path to the display screen of the embodiment of the present invention.
  • FIG. 6 is an image diagram showing an example of a backlight luminance setting table in the image display apparatus according to the embodiment of the present invention.
  • FIG. 7 is a block diagram showing a circuit configuration relating to backlight luminance control of the image display apparatus according to the embodiment of the present invention.
  • FIG. 8 is a flowchart showing a backlight control method of the image display apparatus according to the embodiment of
  • FIG. 1 is a plan view showing an installation environment of an image display apparatus according to an embodiment of the present invention. As shown in FIG. 1, for example, content distribution to seats installed in a cabin 103a (eg, first class), cabin 103b (eg, business class) and cabin 103c (eg, economy class) inside the aircraft 100 A system is provided.
  • a cabin 103a eg, first class
  • cabin 103b eg, business class
  • cabin 103c eg, economy class
  • FIG. 2 is a plan view showing details of the arrangement of seats and the like in the guest room and the installation environment of the content distribution system, and shows an enlarged arrangement of seats in a part of the guest room 103a and the guest room 103b in FIG.
  • an image display device is installed as a viewing facility, and is connected to the content distribution device 104 via communication lines 105a, 105b, and 105c such as Ethernet (registered trademark).
  • lighting fixtures S1 to S8 are arranged on the ceiling of the cabin, and these lighting fixtures S1 to S8 are also connected to the cabin control device 106 that manages the cabin control system via the communication lines 105a, 105b, and 105c. The light is adjusted appropriately according to the flight conditions.
  • windows are arranged on both sides of each seat row, and openable / closable blinds (not shown) are attached to the windows. When the blinds are opened, outside lights A to J enter the cabin from the respective windows.
  • all window blinds are provided with open / close detectors (not shown), and these open / close detectors are also connected to the cabin control device 106 via communication lines 105a, 105b, and 105c. The cabin control device 106 can always grasp the open / closed state.
  • FIG. 3 is a main layout diagram showing the configuration of the image display device and the content distribution system in the embodiment of the present invention.
  • a plurality of seats 41, 42, 43,..., 48 are arranged in N rows in the front-rear direction and M rows in the left-right direction (not shown) in the aircraft cabin.
  • a content distribution communication line C1 (corresponding to the communication lines 105a, 105b, and 105c) connected to the content distribution apparatus is disposed under the floor of each seat.
  • the image display device 43D is also connected to the cabin control device 106 via the communication line C1, so that setting information and control information of the image display device 43D can be communicated with the cabin control device 106.
  • lighting fixtures S1 to S4 are arranged at regular intervals on the ceiling of the passenger compartment above the seat, and these lighting fixtures S1 to S4 are also provided on the ceiling of the communication line C2 (communication lines 105a, 105b, 105c). And the cabin control device 106 can communicate with each other. Although not shown, an open / close detector for a window blind provided in each seat is also connected to the communication line C2.
  • FIG. 4 is a basic configuration diagram showing components of any two adjacent seat rows 401 in the seat group in which the image display device is installed in the embodiment of the present invention.
  • the n-th seat unit 402 from the front (hereinafter abbreviated as a seat 402.
  • the same applies to other seats) includes a seat 420 and a backrest 421.
  • the armrest 422 and the leg 423 are provided, and the backrest 421 is configured such that the backrest angle can be changed around the reclining rotation shaft 426.
  • an image display device 425 of a liquid crystal display having a backlight on the back of the backrest 421 is installed with a variable tilt angle around the tilt rotation axis 424, and displays images distributed from the content distribution device. can do.
  • a tilt control device (not shown) for controlling the tilt angle of the image display device 425 is engaged with the tilt rotation shaft 424, and the tilt angle ⁇ t can be adjusted by a push button or the like.
  • the adjusted tilt angle ⁇ t of the image display device 425 is transmitted to the cabin control device 106 via the communication line C1 (not shown).
  • the (n + 1) th seat 403 from the front adjacent to the seat 402 in the front-rear direction has the same configuration as that of the seat 402, and the other seat groups include similar components.
  • the passenger pulls the image display device 425 toward the passenger side with the tilt rotation shaft 424 as a fulcrum. Then, the tilt angle ⁇ t is increased and adjusted so that the viewing direction is close to a right angle with respect to the image display device 425.
  • FIG. 5 is a perspective view of the image display device 425 for explaining the light path to the display screen 425a of the image display device 425 in the embodiment of the present invention
  • FIG. 6 shows an example of a backlight luminance setting table in the device.
  • FIG. 7 is an image diagram, and FIG. 7 is a block diagram showing a circuit configuration related to luminance control of the backlight of the apparatus.
  • the light environment in an image display device (not shown) disposed in the seat 105 is complex, and the outside lights H, I, and the like incident from the lighting fixtures S6 to S8 and the window next to the seat It will be mainly affected by light.
  • An image displayed on the image display device 425 such as a liquid crystal display differs in appearance (brightness, contrast, hue) depending on the brightness around the display screen of the image display device 425.
  • the brightness of the display screen 425a of the image display device 425 has four directions, that is, light paths in the upward direction (U direction), the left and right directions (L and R directions), and the front direction (V direction) as shown in FIG. It is necessary to consider. Therefore, as a factor that affects the brightness of the light path in the four directions, information (environment information) related to the use environment of the image display device 425 is acquired, and the display screen 425a of the image display device 425 is displayed based on the environment information. Estimate brightness. Then, the luminance of the backlight of the image display device 425 is adjusted so that the visibility is the best with respect to the estimated value of brightness.
  • the environmental information includes the installation environment related to the quantity and position of the lighting fixtures, the installation position (including the tilt angle) of the image display device 425, the lighting fixture on / off, and the illumination related to the adjustment of the illuminance.
  • Information related to the ambient light environment that is incident mainly from the window of the passenger seat such as the environment and the flight status such as the position and opening / closing of the window, the flight time, the flight altitude and the flight position is used.
  • the light applied to the screen of the image display device 425 is due to lighting equipment (nighttime) or sunlight (daytime) depending on the flight time.
  • the direction and amount of sunlight can be estimated from the flight status of the aircraft, flight altitude, flight position, weather, and other flight conditions.
  • the relationship between the brightness of the display screen 425a of the image display device 425 and the brightness of the backlight is related using the backlight brightness setting table that requires the brightness in four directions related to the environment information, and the acquired environment information. Based on this, brightness in four directions is estimated, a backlight luminance setting table is referred to, a backlight luminance setting value is determined, and the luminance of the backlight of the image display device 425 is controlled. As a result, the brightness of the display screen 425a is automatically adjusted so as to provide the best visibility in response to changes in the usage environment.
  • the information related to the use environment of the image display device 425 described above is once collected in the guest room control device 106 of the guest room control system, and each image display device 425 receives the environment information from the guest room control device 106 and analyzes it. Based on the result, the brightness of the backlight of the image display device 425 is controlled.
  • the backlight luminance control unit 800 includes an environment information acquisition unit 801, an environment information analysis unit 802, a backlight luminance calculation unit 803, and a backlight luminance setting unit 806.
  • the environment information acquisition unit 801 is a guest room control device 106 of the guest room control system.
  • the backlight luminance setting unit 806 is connected to the backlight 807, respectively.
  • the backlight luminance calculation unit 803 includes a backlight luminance setting table 804 and a backlight luminance setting value generation unit 805.
  • the environment information acquisition unit 801 obtains the above-described various environment information from the cabin control device 106, including the illuminance of the illuminations 1 and 2 (S1 and S2 in FIG. 4) as the light source and the opening / closing status of the seat windows 412 and 413.
  • the environment information acquisition unit 801 also obtains the tilt angle of the image display device 425 for the own seat.
  • the environment information analysis unit 802 analyzes information related to the usage environment of the image display device 425 and estimates the brightness of the light paths 1 to 4 (up, left, right, front direction).
  • the backlight luminance calculation unit 803 reads the luminance value of the backlight from the backlight luminance setting table 804 based on the analysis result of the environment information analysis unit 802, and outputs it to the backlight luminance setting unit 806.
  • the backlight luminance setting unit 806 Controls the backlight 807 so as to have this luminance value.
  • the backlight luminance calculation unit 803 generates the backlight luminance setting value by calculation using a function or the like based on the analysis result of the environment information analysis unit 802, and the backlight luminance setting value generation unit 805 generates the backlight.
  • the generation information may be output to the light luminance setting unit 806.
  • the luminance of the display screen 425a of the image display device 425 can be automatically controlled based on information related to the use environment such as illumination and external light.
  • step S1 the brightness of the display screen 425a of the image display device 425 is affected, including the illuminance of the illuminations 1 and 2 (S1 and S2 in FIG. 4) as the light source, the opening / closing status of the seat windows 412, 413, and the like. Acquire environmental information of the passenger vehicle to be given.
  • step S2 the acquired environmental information is analyzed, and brightness from a plurality of directions on the display screen 425a of the paths 1 to 4 (upper, left and right, front direction) is estimated.
  • step S3 the brightness of the backlight 807 is calculated from the brightness estimation result of the display screen 425a.
  • the luminance value of the backlight 807 may be read from the backlight luminance setting table 804. Further, based on the estimation result of the brightness of the display screen 425a, it may be generated by calculation using a function or the like.
  • step S4 based on the calculated luminance value (calculated value), the backlight 807 is controlled to set this luminance value (brightness is set).
  • the luminance of the display screen 425a of the image display device 425 can be automatically controlled based on information related to the use environment such as illumination and external light.
  • the backlight control technology of the image display device As described above, by using the backlight control technology of the image display device according to the embodiment of the present invention, information related to the use environment of the image display device is acquired, and the brightness of the display screen of the image display device is automatically controlled. It becomes possible to do. Therefore, it is possible to perform backlight control that can maintain a highly visible display screen in an aircraft regardless of a change in brightness around the display screen or a change in the direction of light irradiation on the display screen. As a result, an image display device with high quality and stable display quality for aircraft can be realized.
  • the environment information analysis unit 802 and the backlight luminance calculation unit 803 are arranged on the image display device 425 side.
  • the present invention is not limited to this, and these are arranged on the cabin control device 106 side. You may prepare.
  • the cabin control device 106 calculates the backlight luminance values of the image display devices for all seats in the cabin, and transmits the result to the corresponding image display device.
  • the image display device controls the luminance value of the backlight based on this information.
  • the present invention can maintain stable display quality even when the usage environment of the image display apparatus changes in a complicated manner, the present invention is installed in passenger moving bodies such as trains and ships as well as airplanes. It can be widely used for image display devices.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Liquid Crystal (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

Provided is an image display device having a backlight (807) installed in a cabin of an aircraft or other traveler-carrying body. The image display device includes: an ambient information acquisition unit (801) for acquiring ambient information around the traveler-carrying body which affects the brightness of a display screen; an ambient information analysis unit (802) which estimates the brightness of the display screen from the acquired ambient information; a luminance calculation unit (803) which calculates a luminance of backlight in accordance with the brightness of the display screen; and a backlight luminance setting unit (806) which sets the luminance of the backlight in accordance with the value calculated by the backlight luminance calculation unit. Thus, it is possible to maintain a preferable visibility on the display screen.

Description

画像表示装置および画像表示装置のバックライト制御方法Image display apparatus and backlight control method for image display apparatus
　本発明は、航空機や列車等の旅客移動体に搭載された画像表示装置および画像表示装置のバックライト制御方法に関するものである。 The present invention relates to an image display device mounted on a passenger moving body such as an aircraft or a train, and a backlight control method for the image display device.
　航空機などの旅客移動体内においては、客室内に配備されているＩＦＥ（Ｉｎ－Ｆｌｉｇｈｔ　Ｅｎｔｅｒｔａｉｎｍｅｎｔ）と呼ばれる機内エンターテインメントシステムにより、乗客にいろいろなサービスが提供されている。例えば、乗客は映画や音楽などのコンテンツを前座席の背部に配置された液晶ディスプレイで映像を鑑賞し、音声を自座席の肘掛部に接続されたヘッドフォンを使用して聴取する。さらに、各座席の肘掛部に設けられているハンドセットと呼ばれる操作用リモコンなどを用いてＡＶコンテンツを選択したり、ゲームをしたり、インターネットへの接続サービスを受けたりすることが可能なシステムも提供されている。 In passenger moving bodies such as aircraft, various services are provided to passengers by an in-flight entertainment system called IFE (In-Flight Entertainment) installed in a passenger cabin. For example, a passenger views content such as a movie or music on a liquid crystal display disposed on the back of the front seat, and listens to sound using headphones connected to the armrest of the seat. In addition, a system is also provided that allows users to select AV content, play games, and receive Internet connection services using a remote control for operation called a handset provided on the armrest of each seat. Has been.
　ところで、航空機等の客室において液晶ディスプレイ等の画像表示装置を使用する場合には、表示画面の明るさが使用環境により変化するため、乗客にとって快適な明るさを維持することが難しいという課題がある。 By the way, when using an image display device such as a liquid crystal display in a cabin such as an aircraft, there is a problem that it is difficult to maintain a comfortable brightness for passengers because the brightness of the display screen changes depending on the usage environment. .
　これに対して、画像表示装置の明るさを調整する技術として、近年、周囲の光の強弱に応じて、表示画面の輝度を自動的に変化させ、乗客に文字や図形を視認しやすい画面を提供する技術、移動体の走行状態や移動体内の明るさなどの情報に応じて画像表示装置のバックライトの光量を調整する技術、およびセンサーにより検出されたバックライトの明るさを所定の輝度レベルと比較し、航空機の客室等に設けられた複数の表示装置の画面の明るさを制限する技術などが開示されている（例えば、特許文献１～３参照）。 On the other hand, as a technology for adjusting the brightness of the image display device, in recent years, the brightness of the display screen is automatically changed according to the intensity of ambient light, and a screen that makes it easy for passengers to visually recognize characters and figures Technology to provide, technology to adjust the amount of backlight of the image display device according to information such as the running state of the moving body and the brightness of the moving body, and the brightness of the backlight detected by the sensor to a predetermined luminance level Compared to the above, a technique for limiting the brightness of the screens of a plurality of display devices provided in an aircraft cabin or the like is disclosed (for example, see Patent Documents 1 to 3).
　しかしながら、航空機の客室などでは、多数配設された画像表示装置はそれぞれ設置環境が異なる他、乗客の客席における行動、航空機の飛行状況等により、画像表示装置の周囲の明るさが変化し、多数の画像表示装置の表示画面における視認性を常に良好に維持するのは難しかった。 However, in aircraft cabins and the like, a large number of image display devices are installed in different environments, and the brightness around the image display device changes depending on the behavior of passengers in passenger seats, flight status of aircraft, etc. It has been difficult to maintain good visibility on the display screen of the image display device.
　また、周囲の明るさをセンサーで検出して、検出結果に応じてバックライトの光量（輝度）を調整する方法では、下記のような課題があった。例えば、屋内に設置してある画像表示装置では画面に照射される光の方向はほぼ固定しているので（例えば、屋内の照明など）センサーの検出結果により比較的容易にバックライトの最適な輝度を設定できる。しかしながら、航空機のような移動体に設置された画像表示装置では、窓から差し込む太陽光の方向や、乗客が設定する画像表示装置の設定条件（チルト角度）などにより画面に照射される光の方向は時々刻々変化する。したがって、固定の位置に設置したセンサーで検出する明るさに応じてバックライトの輝度を設定するのみでは、十分な視認性が確保できない。全ての方向からの光を検出するために多数のセンサーを設置すると、画像表示装置のコストアップとなったり、複雑な制御が必要となる。 Also, the method of detecting the ambient brightness with a sensor and adjusting the amount of light (brightness) of the backlight according to the detection result has the following problems. For example, in an image display device installed indoors, the direction of the light radiated to the screen is almost fixed (for example, indoor lighting). Can be set. However, in an image display device installed on a moving body such as an aircraft, the direction of the sunlight irradiated from the window, the direction of light irradiated on the screen depending on the setting condition (tilt angle) of the image display device set by the passenger, etc. Changes from moment to moment. Therefore, sufficient visibility cannot be ensured only by setting the luminance of the backlight according to the brightness detected by the sensor installed at a fixed position. If a large number of sensors are installed in order to detect light from all directions, the cost of the image display device is increased and complicated control is required.
　また、画像表示装置の画面の周囲の明るさが同じでも昼間の太陽光の環境下と、夜間の照明の環境下とでは光のスペクトル分布も異なり、最も視認性がよくなるバックライトの輝度設定に差がある。
特開平７－６４０５７号公報 特表２００７－５２２００７号公報 特開平１０－９７２０２号公報 In addition, even if the brightness of the screen of the image display device is the same, the light spectral distribution differs between daytime sunlight environments and nighttime illumination environments, and the backlight brightness setting provides the best visibility. There is a difference.
Japanese Patent Laid-Open No. 7-64057 Special Table 2007-522007 JP-A-10-97202
　本発明の画像表示装置は、旅客移動体の客室内に設置されたバックライトを備えた画像表示装置であって、画像表示装置の表示画面の明るさに影響を与える旅客移動体の環境情報を取得する環境情報取得部と、取得した環境情報を解析して表示画面における明るさを推定する環境情報解析部と、環境情報解析部により推定された表示画面の明るさからバックライトの輝度を算出するバックライト輝度算出部と、バックライト輝度算出部の算出値に基づきバックライトの輝度を設定するバックライト輝度設定部とを備える。 An image display apparatus according to the present invention is an image display apparatus having a backlight installed in a passenger moving body's passenger cabin, and provides environmental information of the passenger moving body that affects the brightness of the display screen of the image display apparatus. The environment information acquisition unit to acquire, the environment information analysis unit that analyzes the acquired environment information and estimates the brightness on the display screen, and calculates the backlight brightness from the brightness of the display screen estimated by the environment information analysis unit And a backlight luminance setting unit that sets the luminance of the backlight based on the calculated value of the backlight luminance calculating unit.
　このような構成により、画像表示装置の使用環境に係わる情報に基づいてバックライトの輝度を制御するので、画像表示装置の使用環境の変化にかかわりなく、例えば航空機内で画像表示装置の表示画面における視認性を良好に維持することが可能となる。 With such a configuration, the brightness of the backlight is controlled based on information related to the usage environment of the image display device, so that, for example, in the display screen of the image display device in an aircraft, regardless of changes in the usage environment of the image display device. Visibility can be maintained well.
　本発明の画像表示装置のバックライト制御方法は、旅客移動体の客室内に設置されたバックライトを備えた画像表示装置のバックライト制御方法であって、画像表示装置の表示画面の明るさに影響を与える旅客移動体の環境情報を取得する環境情報取得ステップと、取得した環境情報を解析して表示画面における明るさを推定する環境情報解析ステップと、環境情報解析ステップにより推定された表示画面の明るさからバックライトの輝度を算出するバックライト輝度算出ステップと、バックライト輝度算出ステップの算出値に基づきバックライトの輝度を設定するバックライト輝度設定ステップと、を備える。 A backlight control method for an image display device according to the present invention is a backlight control method for an image display device having a backlight installed in a passenger cabin of a passenger moving body, the brightness of the display screen of the image display device being adjusted. An environmental information acquisition step for acquiring environmental information of an impacting passenger vehicle, an environmental information analysis step for analyzing the acquired environmental information and estimating brightness on the display screen, and a display screen estimated by the environmental information analysis step A backlight luminance calculating step for calculating the luminance of the backlight from the brightness of the backlight, and a backlight luminance setting step for setting the luminance of the backlight based on the calculated value of the backlight luminance calculating step.
図１は本発明の実施の形態における画像表示装置の設置環境を示す平面図である。FIG. 1 is a plan view showing an installation environment of an image display apparatus according to an embodiment of the present invention. 図２は本発明の実施の形態における画像表示装置の設置環境の詳細を示す平面図である。FIG. 2 is a plan view showing details of the installation environment of the image display apparatus according to the embodiment of the present invention. 図３は本発明の実施の形態における画像表示装置およびコンテンツ配信システムの構成を示す主要配置図である。FIG. 3 is a main layout diagram showing the configuration of the image display device and the content distribution system in the embodiment of the present invention. 図４は本発明の実施の形態における画像表示装置が設置された座席列の構成要素を示す基本構成図である。FIG. 4 is a basic configuration diagram showing components of the seat row in which the image display device according to the embodiment of the present invention is installed. 図５は本発明の実施の形態における画像表示装置の表示画面への光経路を説明するための同装置の斜視図である。FIG. 5 is a perspective view of the image display device for explaining an optical path to the display screen of the embodiment of the present invention. 図６は本発明の実施の形態における画像表示装置におけるバックライト輝度設定テーブルの事例を示すイメージ図である。FIG. 6 is an image diagram showing an example of a backlight luminance setting table in the image display apparatus according to the embodiment of the present invention. 図７は本発明の実施の形態における画像表示装置のバックライトの輝度制御に係わる回路構成を示すブロック図である。FIG. 7 is a block diagram showing a circuit configuration relating to backlight luminance control of the image display apparatus according to the embodiment of the present invention. 図８は本発明の実施の形態における画像表示装置のバックライトの制御方法を示すフローチャートである。FIG. 8 is a flowchart showing a backlight control method of the image display apparatus according to the embodiment of the present invention.
符号の説明Explanation of symbols
　４１～４８，１０５，４０２，４０３　　座席
　４３Ｄ，４２５　　画像表示装置
　４３Ｈ　　ヘッドフォン
　１００　　航空機
　１０３ａ，１０３ｂ，１０３ｃ　　客室
　１０４　　コンテンツ配信装置
　１０５ａ，１０５ｂ，１０５ｃ，Ｃ１，Ｃ２　　通信回線
　１０６　　客室制御装置
　４０１　　座席列
　４１２，４１３　　窓
　４２０　　腰掛部
　４２１　　背もたれ
　４２２　　肘掛部
　４２３　　脚部
　４２４　　チルト回転軸
　４２５ａ　　表示画面
　４２６　　リクライニング回転軸
　８０１　　環境情報取得部
　８０２　　環境情報解析部
　８０３　　バックライト輝度算出部
　８０４　　バックライト輝度設定テーブル
　８０５　　バックライト輝度設定値生成部
　８０６　　バックライト輝度設定部
　８０７　　バックライト
　Ａ～Ｊ　　外光
　Ｓ１～Ｓ８　　照明器具
　θｔ　　チルト角
　Ｌ，Ｒ，Ｕ，Ｖ　　光径路 41 to 48, 105, 402, 403 Seat 43D, 425 Image display device 43H Headphone 100 Aircraft 103a, 103b, 103c Guest room 104 Content distribution device 105a, 105b, 105c, C1, C2 Communication line 106 Guest room control device 401 Seat row 412 413 Window 420 Seat part 421 Backrest 422 Armrest part 423 Leg part 424 Tilt rotation axis 425a Display screen 426 Reclining rotation axis 801 Environmental information acquisition part 802 Environmental information analysis part 803 Backlight brightness calculation part 804 Backlight brightness setting table 805 Backlight brightness Set value generation unit 806 Backlight brightness setting unit 807 Backlight A to J External light S1 to S8 Lighting fixture θt Tilt angle L, R, U, V Light path
　以下、本発明の実施の形態について、図１から図８を参照しながら詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.
　（実施の形態）
　図１は、本発明の実施の形態における画像表示装置の設置環境を示す平面図である。図１に示すように、例えば航空機１００の内部の客室１０３ａ（例えば、ファーストクラス）、客室１０３ｂ（例えば、ビジネスクラス）および客室１０３ｃ（例えば、エコノミークラス）に設置された座席列に対してコンテンツ配信システムが配設されている。 (Embodiment)
FIG. 1 is a plan view showing an installation environment of an image display apparatus according to an embodiment of the present invention. As shown in FIG. 1, for example, content distribution to seats installed in a cabin 103a (eg, first class), cabin 103b (eg, business class) and cabin 103c (eg, economy class) inside the aircraft 100 A system is provided.
　図２は、客室内の座席等の配列およびコンテンツ配信システムの設置環境の詳細を示す平面図であり、図１における客室１０３ａおよび客室１０３ｂの一部における座席の配置を拡大して示している。各座席列には視聴設備として画像表示装置が設置され、イーサネット（登録商標）等の通信回線１０５ａ、１０５ｂ、１０５ｃを介してコンテンツ配信装置１０４に接続されている。また、客室の天井には照明器具Ｓ１～Ｓ８が配設されており、これらの照明器具Ｓ１～Ｓ８も通信回線１０５ａ、１０５ｂ、１０５ｃを介して客室制御システムを管理する客室制御装置１０６と接続されており、飛行状況に応じて適切に調光が行われる。また、それぞれの座席列の両側には窓が配置されており、各窓にはそれぞれ開閉自在のブラインド（図示せず）が取り付けられている。そして、ブラインドを開いた場合には、それぞれの窓からは外光Ａ～Ｊが客室内に入射する。また、すべての窓のブラインドは開閉検知器（図示せず）を備えており、この開閉検知器も通信回線１０５ａ、１０５ｂ、１０５ｃを介して客室制御装置１０６と接続されており、各窓のブラインドの開閉状態が客室制御装置１０６によって常時把握できるようになっている。 FIG. 2 is a plan view showing details of the arrangement of seats and the like in the guest room and the installation environment of the content distribution system, and shows an enlarged arrangement of seats in a part of the guest room 103a and the guest room 103b in FIG. In each seat row, an image display device is installed as a viewing facility, and is connected to the content distribution device 104 via communication lines 105a, 105b, and 105c such as Ethernet (registered trademark). In addition, lighting fixtures S1 to S8 are arranged on the ceiling of the cabin, and these lighting fixtures S1 to S8 are also connected to the cabin control device 106 that manages the cabin control system via the communication lines 105a, 105b, and 105c. The light is adjusted appropriately according to the flight conditions. In addition, windows are arranged on both sides of each seat row, and openable / closable blinds (not shown) are attached to the windows. When the blinds are opened, outside lights A to J enter the cabin from the respective windows. In addition, all window blinds are provided with open / close detectors (not shown), and these open / close detectors are also connected to the cabin control device 106 via communication lines 105a, 105b, and 105c. The cabin control device 106 can always grasp the open / closed state.
　図３は、本発明の実施の形態における画像表示装置およびコンテンツ配信システムの構成を示す主要配置図である。 FIG. 3 is a main layout diagram showing the configuration of the image display device and the content distribution system in the embodiment of the present invention.
　図３に示すように、航空機客室内には複数の座席４１、４２、４３、・・・、４８が前後方向にＮ列、左右方向にＭ行配置され（図示せず）、例えば、座席４３には画像表示装置４３Ｄおよびヘッドフォン４３Ｈが備えられており、コンテンツ配信装置（図示せず）から映像データや音声データ等を受信して乗客にコンテンツサービスの提供を行うことができる。各座席の床下にはコンテンツ配信装置に接続されたコンテンツ配信用の通信回線Ｃ１（通信回線１０５ａ、１０５ｂ、１０５ｃに相当）が配設されている。また、通信回線Ｃ１を介して画像表示装置４３Ｄは客室制御装置１０６にも接続されており、画像表示装置４３Ｄの設定情報や制御情報を客室制御装置１０６と通信できるようになっている。また、座席上部の客室の天井には一定間隔で照明器具Ｓ１～Ｓ４が配設されており、これらの照明器具Ｓ１～Ｓ４も天井に配設された通信回線Ｃ２（通信回線１０５ａ、１０５ｂ、１０５ｃに相当）と接続されて客室制御装置１０６と通信可能となっている。図示していないが各座席に備わった窓のブラインドの開閉検知器も同様に通信回線Ｃ２に接続されている。 As shown in FIG. 3, a plurality of seats 41, 42, 43,..., 48 are arranged in N rows in the front-rear direction and M rows in the left-right direction (not shown) in the aircraft cabin. Is provided with an image display device 43D and a headphone 43H, which can receive video data, audio data, etc. from a content distribution device (not shown) and provide content services to passengers. A content distribution communication line C1 (corresponding to the communication lines 105a, 105b, and 105c) connected to the content distribution apparatus is disposed under the floor of each seat. The image display device 43D is also connected to the cabin control device 106 via the communication line C1, so that setting information and control information of the image display device 43D can be communicated with the cabin control device 106. In addition, lighting fixtures S1 to S4 are arranged at regular intervals on the ceiling of the passenger compartment above the seat, and these lighting fixtures S1 to S4 are also provided on the ceiling of the communication line C2 ( communication lines 105a, 105b, 105c). And the cabin control device 106 can communicate with each other. Although not shown, an open / close detector for a window blind provided in each seat is also connected to the communication line C2.
　図４は、本発明の実施の形態において画像表示装置が設置された座席群のうち、任意の隣接する２つの座席列４０１の構成要素を示す基本構成図である。 FIG. 4 is a basic configuration diagram showing components of any two adjacent seat rows 401 in the seat group in which the image display device is installed in the embodiment of the present invention.
　床面に少なくとも前後方向に配列された複数の座席のうち、前からｎ番目の座席ユニット４０２（以下、座席４０２と略記する。その他の座席についても同様とする）は、腰掛部４２０、背もたれ４２１、肘掛部４２２および脚部４２３を備え、背もたれ４２１はリクライニング回転軸４２６を中心として背もたれ角度の変更が可能に構成されている。また、座席４０２には、背もたれ４２１の背面にバックライトを備えた液晶ディスプレイの画像表示装置４２５がチルト回転軸４２４を中心としてチルト角が可変に設置され、コンテンツ配信装置から配信される画像を表示することができる。さらに、チルト回転軸４２４には、画像表示装置４２５のチルト角を制御するチルト制御装置（図示せず）が係合され、押しボタン等によりチルト角θｔの調整を行うことができる。そして、画像表示装置４２５の調整後のチルト角θｔは通信回線Ｃ１（図示せず）を介して客室制御装置１０６へ送信される構成となっている。なお、前後方向に座席４０２と隣接する前からｎ＋１番目の座席４０３も座席４０２と同様の構成とし、他の座席群も同様の構成要素を備えている。 Among a plurality of seats arranged at least in the front-rear direction on the floor surface, the n-th seat unit 402 from the front (hereinafter abbreviated as a seat 402. The same applies to other seats) includes a seat 420 and a backrest 421. The armrest 422 and the leg 423 are provided, and the backrest 421 is configured such that the backrest angle can be changed around the reclining rotation shaft 426. In addition, on the seat 402, an image display device 425 of a liquid crystal display having a backlight on the back of the backrest 421 is installed with a variable tilt angle around the tilt rotation axis 424, and displays images distributed from the content distribution device. can do. Further, a tilt control device (not shown) for controlling the tilt angle of the image display device 425 is engaged with the tilt rotation shaft 424, and the tilt angle θt can be adjusted by a push button or the like. The adjusted tilt angle θt of the image display device 425 is transmitted to the cabin control device 106 via the communication line C1 (not shown). Note that the (n + 1) th seat 403 from the front adjacent to the seat 402 in the front-rear direction has the same configuration as that of the seat 402, and the other seat groups include similar components.
　乗客が着席する座席のリクライニングを起こした状態で、画像表示装置４２５を設置した前の座席が背もたれ４２１を倒した場合、乗客はチルト回転軸４２４を支点にして画像表示装置４２５を乗客側に引き寄せ、チルト角θｔを大きくして、画像表示装置４２５に対して視認方向が直角に近くなるように調整する。 When the seat in which the passenger is seated is reclining and the seat in front of the image display device 425 has tilted the backrest 421, the passenger pulls the image display device 425 toward the passenger side with the tilt rotation shaft 424 as a fulcrum. Then, the tilt angle θt is increased and adjusted so that the viewing direction is close to a right angle with respect to the image display device 425.
　次に、本発明の特徴である画像表示装置４２５のバックライトの輝度制御に係わる構成および機能について、図２および図５～８を用いて説明する。図５は本発明の実施の形態における画像表示装置４２５の表示画面４２５ａへの光経路を説明するための画像表示装置４２５の斜視図、図６は同装置におけるバックライト輝度設定テーブルの事例を示すイメージ図、図７は同装置のバックライトの輝度制御に係わる回路構成を示すブロック図をそれぞれ示す。 Next, the configuration and functions related to the luminance control of the backlight of the image display device 425, which is a feature of the present invention, will be described with reference to FIG. 2 and FIGS. FIG. 5 is a perspective view of the image display device 425 for explaining the light path to the display screen 425a of the image display device 425 in the embodiment of the present invention, and FIG. 6 shows an example of a backlight luminance setting table in the device. FIG. 7 is an image diagram, and FIG. 7 is a block diagram showing a circuit configuration related to luminance control of the backlight of the apparatus.
　図２に示すように、例えば座席１０５に配設された画像表示装置（図示せず）における光環境は複雑であり、照明器具Ｓ６～Ｓ８および座席横の窓から入射する外光Ｈ、Ｉその他による光の影響を主として受けることになる。 As shown in FIG. 2, for example, the light environment in an image display device (not shown) disposed in the seat 105 is complex, and the outside lights H, I, and the like incident from the lighting fixtures S6 to S8 and the window next to the seat It will be mainly affected by light.
　液晶ディスプレイ等の画像表示装置４２５に表示された画像は画像表示装置４２５の表示画面周辺の明るさにより見え方（輝度、コントラスト、色相）が異なる。 An image displayed on the image display device 425 such as a liquid crystal display differs in appearance (brightness, contrast, hue) depending on the brightness around the display screen of the image display device 425.
　一方、画像表示装置４２５の表示画面４２５ａの明るさは、図５に示すように４方向すなわち上方向（Ｕ方向）、左右方向（Ｌ、Ｒ方向）および正面方向（Ｖ方向）の光経路を考慮する必要がある。そこで、この４方向の光経路の明るさに影響を与える要因として、画像表示装置４２５の使用環境に係わる情報（環境情報）を取得し、環境情報に基づいて画像表示装置４２５の表示画面４２５ａの明るさを推定する。そしてこの明るさの推定値に対して視認性が最も良好となるように画像表示装置４２５のバックライトの輝度を調整する。 On the other hand, the brightness of the display screen 425a of the image display device 425 has four directions, that is, light paths in the upward direction (U direction), the left and right directions (L and R directions), and the front direction (V direction) as shown in FIG. It is necessary to consider. Therefore, as a factor that affects the brightness of the light path in the four directions, information (environment information) related to the use environment of the image display device 425 is acquired, and the display screen 425a of the image display device 425 is displayed based on the environment information. Estimate brightness. Then, the luminance of the backlight of the image display device 425 is adjusted so that the visibility is the best with respect to the estimated value of brightness.
　環境情報としては、例えば航空機の場合、照明器具の数量・位置、画像表示装置４２５の取付け位置（チルト角を含む）等に係わる設置環境、照明器具のオン／オフや照度の調節等に係わる照明環境、および窓の位置や開閉、飛行時刻や飛行高度および飛行位置等の飛行状況などの主として客席の窓から入射する外光環境に係わる情報を使用する。例えば、飛行時刻により画像表示装置４２５の画面に照射される光が照明器具（夜間）によるものか、太陽光（昼間）によるものかが容易に判断できる。また、航空機の飛行時刻、飛行高度、飛行位置、天候などの飛行状況から太陽光の照射する方向および光量が推定可能となる。 For example, in the case of an aircraft, the environmental information includes the installation environment related to the quantity and position of the lighting fixtures, the installation position (including the tilt angle) of the image display device 425, the lighting fixture on / off, and the illumination related to the adjustment of the illuminance. Information related to the ambient light environment that is incident mainly from the window of the passenger seat such as the environment and the flight status such as the position and opening / closing of the window, the flight time, the flight altitude and the flight position is used. For example, it can be easily determined whether the light applied to the screen of the image display device 425 is due to lighting equipment (nighttime) or sunlight (daytime) depending on the flight time. Further, the direction and amount of sunlight can be estimated from the flight status of the aircraft, flight altitude, flight position, weather, and other flight conditions.
　画像表示装置４２５の表示画面４２５ａの明るさとバックライトの輝度との関係については、環境情報に係わる４方向の明るさを要件とするバックライト輝度設定テーブルを使用して関連付け、取得した環境情報に基づき４方向の明るさを推定してバックライト輝度設定テーブルを参照して、バックライト輝度設定値を決定し、画像表示装置４２５のバックライトの輝度を制御する。これにより、表示画面４２５ａの輝度を使用環境の変化に対応して、最も視認性がよくなるように自動的に調節する。 The relationship between the brightness of the display screen 425a of the image display device 425 and the brightness of the backlight is related using the backlight brightness setting table that requires the brightness in four directions related to the environment information, and the acquired environment information. Based on this, brightness in four directions is estimated, a backlight luminance setting table is referred to, a backlight luminance setting value is determined, and the luminance of the backlight of the image display device 425 is controlled. As a result, the brightness of the display screen 425a is automatically adjusted so as to provide the best visibility in response to changes in the usage environment.
　なお、上述した画像表示装置４２５の使用環境に係る情報は客室制御システムの客室制御装置１０６に一旦集められ、各画像表示装置４２５はこの環境情報を客室制御装置１０６から受け取って解析し、その解析結果に基づいて、画像表示装置４２５のバックライトの輝度を制御する。 The information related to the use environment of the image display device 425 described above is once collected in the guest room control device 106 of the guest room control system, and each image display device 425 receives the environment information from the guest room control device 106 and analyzes it. Based on the result, the brightness of the backlight of the image display device 425 is controlled.
　次に、図７を用いて、本発明の実施の形態における画像表示装置４２５のバックライトの輝度制御に係わる構成について説明する。 Next, a configuration related to backlight luminance control of the image display device 425 according to the embodiment of the present invention will be described with reference to FIG.
　バックライト輝度制御部８００は、環境情報取得部８０１、環境情報解析部８０２、バックライト輝度算出部８０３、バックライト輝度設定部８０６を備え、環境情報取得部８０１は客室制御システムの客室制御装置１０６に、バックライト輝度設定部８０６はバックライト８０７に、それぞれ接続される。また、バックライト輝度算出部８０３は、バックライト輝度設定テーブル８０４、バックライト輝度設定値生成部８０５を備えている。 The backlight luminance control unit 800 includes an environment information acquisition unit 801, an environment information analysis unit 802, a backlight luminance calculation unit 803, and a backlight luminance setting unit 806. The environment information acquisition unit 801 is a guest room control device 106 of the guest room control system. In addition, the backlight luminance setting unit 806 is connected to the backlight 807, respectively. The backlight luminance calculation unit 803 includes a backlight luminance setting table 804 and a backlight luminance setting value generation unit 805.
　環境情報取得部８０１では、光源としての照明１～２（図４のＳ１、Ｓ２）の照度、座席の窓４１２、４１３の開閉状況をはじめ上述した各種環境情報を客室制御装置１０６から入手する。また環境情報取得部８０１は自座席の画像表示装置４２５のチルト角度も入手する。環境情報解析部８０２は、これらの画像表示装置４２５の使用環境に係わる情報を解析し光径路１～４（上、左右、正面方向）の明るさを推定する。 The environment information acquisition unit 801 obtains the above-described various environment information from the cabin control device 106, including the illuminance of the illuminations 1 and 2 (S1 and S2 in FIG. 4) as the light source and the opening / closing status of the seat windows 412 and 413. The environment information acquisition unit 801 also obtains the tilt angle of the image display device 425 for the own seat. The environment information analysis unit 802 analyzes information related to the usage environment of the image display device 425 and estimates the brightness of the light paths 1 to 4 (up, left, right, front direction).
　バックライト輝度算出部８０３は、環境情報解析部８０２の解析結果に基づいてバックライト輝度設定テーブル８０４からバックライトの輝度値を読み出してバックライト輝度設定部８０６に出力し、バックライト輝度設定部８０６は、この輝度値になるようにバックライト８０７を制御する。 The backlight luminance calculation unit 803 reads the luminance value of the backlight from the backlight luminance setting table 804 based on the analysis result of the environment information analysis unit 802, and outputs it to the backlight luminance setting unit 806. The backlight luminance setting unit 806 Controls the backlight 807 so as to have this luminance value.
　あるいは、バックライト輝度算出部８０３は、環境情報解析部８０２の解析結果に基づいてバックライト輝度設定値生成部８０５がバックライトの輝度の設定値を関数等を使用して計算によって生成し、バックライト輝度設定部８０６に生成情報を出力してもよい。 Alternatively, the backlight luminance calculation unit 803 generates the backlight luminance setting value by calculation using a function or the like based on the analysis result of the environment information analysis unit 802, and the backlight luminance setting value generation unit 805 generates the backlight. The generation information may be output to the light luminance setting unit 806.
　これにより、画像表示装置４２５の表示画面４２５ａの輝度を、照明や外光などの使用環境に係わる情報に基づいて自動的に制御することができる。 Thereby, the luminance of the display screen 425a of the image display device 425 can be automatically controlled based on information related to the use environment such as illumination and external light.
　次に、画像表示装置４２５のバックライト８０７の制御方法を図４～図７を参照し、図８に示すフローチャートを用いて説明する。まず、ステップＳ１において、光源としての照明１～２（図４のＳ１、Ｓ２）の照度、座席の窓４１２、４１３の開閉状況をはじめ、画像表示装置４２５の表示画面４２５ａの明るさに影響を与える旅客移動体の環境情報を取得する。 Next, a method for controlling the backlight 807 of the image display device 425 will be described with reference to FIGS. 4 to 7 and a flowchart shown in FIG. First, in step S1, the brightness of the display screen 425a of the image display device 425 is affected, including the illuminance of the illuminations 1 and 2 (S1 and S2 in FIG. 4) as the light source, the opening / closing status of the seat windows 412, 413, and the like. Acquire environmental information of the passenger vehicle to be given.
　次に、ステップＳ２で、取得した環境情報を解析し、径路１～４（上、左右、正面方向）の表示画面４２５ａの複数の方向からの明るさを推定する。その後、ステップＳ３で、表示画面４２５ａの明るさの推定結果からバックライト８０７の輝度を算出する。このバックライト８０７の輝度の算出は、バックライト輝度設定テーブル８０４からバックライト８０７の輝度値を読み出すようにしてもよい。また、表示画面４２５ａの明るさの推定結果に基づいて、関数等を使用して計算によって生成してもよい。最後に、ステップＳ４で、算出された輝度値（算出値）に基づいて、この輝度値になるようにバックライト８０７を制御（輝度を設定）する。これにより、画像表示装置４２５の表示画面４２５ａの輝度を、照明や外光などの使用環境に係わる情報に基づいて自動的に制御することができる。 Next, in step S2, the acquired environmental information is analyzed, and brightness from a plurality of directions on the display screen 425a of the paths 1 to 4 (upper, left and right, front direction) is estimated. Thereafter, in step S3, the brightness of the backlight 807 is calculated from the brightness estimation result of the display screen 425a. In calculating the luminance of the backlight 807, the luminance value of the backlight 807 may be read from the backlight luminance setting table 804. Further, based on the estimation result of the brightness of the display screen 425a, it may be generated by calculation using a function or the like. Finally, in step S4, based on the calculated luminance value (calculated value), the backlight 807 is controlled to set this luminance value (brightness is set). As a result, the luminance of the display screen 425a of the image display device 425 can be automatically controlled based on information related to the use environment such as illumination and external light.
　以上の通り、本発明の実施の形態における画像表示装置のバックライト制御技術を使用すれば、画像表示装置の使用環境に係わる情報を取得し、画像表示装置の表示画面の輝度を自動的に制御することが可能となる。したがって、表示画面周辺の明るさの変化や表示画面への光の照射方向の変化にかかわりなく、航空機内で視認性の高い表示画面を維持することが可能なバックライト制御を行うことができる。これにより、航空機用の高品質かつ安定した表示品質の画像表示装置を実現することができる。 As described above, by using the backlight control technology of the image display device according to the embodiment of the present invention, information related to the use environment of the image display device is acquired, and the brightness of the display screen of the image display device is automatically controlled. It becomes possible to do. Therefore, it is possible to perform backlight control that can maintain a highly visible display screen in an aircraft regardless of a change in brightness around the display screen or a change in the direction of light irradiation on the display screen. As a result, an image display device with high quality and stable display quality for aircraft can be realized.
　なお、上記実施の形態では、環境情報解析部８０２およびバックライト輝度算出部８０３は画像表示装置４２５側に配置すると説明したが、これに限定されることはなく、これらを客室制御装置１０６側に備えてもよい。この場合は、客室制御装置１０６では客室内のすべての座席の画像表示装置のバックライト輝度値を算出し、その結果を対応する画像表示装置に送信する。画像表示装置はこの情報に基づいてバックライトの輝度値を制御する。 In the above embodiment, it has been described that the environment information analysis unit 802 and the backlight luminance calculation unit 803 are arranged on the image display device 425 side. However, the present invention is not limited to this, and these are arranged on the cabin control device 106 side. You may prepare. In this case, the cabin control device 106 calculates the backlight luminance values of the image display devices for all seats in the cabin, and transmits the result to the corresponding image display device. The image display device controls the luminance value of the backlight based on this information.
　本発明は、画像表示装置の使用環境が複雑に変化した場合であっても、安定した表示品質を維持することができるため、例えば、航空機に限らず列車、船舶等の旅客移動体内に設置した画像表示装置に幅広く利用することができる。 Since the present invention can maintain stable display quality even when the usage environment of the image display apparatus changes in a complicated manner, the present invention is installed in passenger moving bodies such as trains and ships as well as airplanes. It can be widely used for image display devices.

Claims (8)

  1. 旅客移動体の客室内に設置されたバックライトを備えた画像表示装置であって、前記画像表示装置の表示画面の明るさに影響を与える前記旅客移動体の環境情報を取得する環境情報取得部と、取得した前記環境情報を解析して前記表示画面における明るさを推定する環境情報解析部と、前記環境情報解析部により推定された前記表示画面の明るさから前記バックライトの輝度を算出するバックライト輝度算出部と、前記バックライト輝度算出部の算出値に基づき前記バックライトの輝度を設定するバックライト輝度設定部とを備えた画像表示装置。 An image display device provided with a backlight installed in a passenger moving body's cabin, the environment information acquiring unit acquiring environmental information of the passenger moving body that affects the brightness of the display screen of the image display device And analyzing the acquired environment information to estimate the brightness on the display screen, and calculating the brightness of the backlight from the brightness of the display screen estimated by the environment information analysis unit An image display device comprising: a backlight luminance calculating unit; and a backlight luminance setting unit that sets the luminance of the backlight based on a value calculated by the backlight luminance calculating unit.
  2. 前記環境情報解析部は前記環境情報から前記画像表示装置の表示画面に対する複数の方向の明るさを推定し、前記推定された明るさに基づいて、前記バックライト輝度算出部は前記画像表示装置のバックライトの輝度を算出する請求項１に記載の画像表示装置。 The environment information analysis unit estimates brightness in a plurality of directions with respect to the display screen of the image display device from the environment information, and based on the estimated brightness, the backlight luminance calculation unit The image display device according to claim 1, wherein the brightness of the backlight is calculated.
  3. 前記複数の方向は、前記画像表示装置の上、左右および正面の４つの方向である請求項２に記載の画像表示装置。 The image display device according to claim 2, wherein the plurality of directions are four directions on the image display device: left, right, and front.
  4. 前記環境情報は、前記旅客移動体の客室内に設置された照明器具の照明情報、前記画像表示装置の取付け情報、前記旅客移動体に配設された窓の位置情報、前記窓に備えられたブラインドの開閉情報および前記旅客移動体の移動情報の少なくとも１つを含む請求項１～３のいずれか１項に記載の画像表示装置。 The environmental information includes lighting information of lighting fixtures installed in a passenger cabin of the passenger moving body, mounting information of the image display device, position information of a window disposed in the passenger moving body, and the window. The image display device according to any one of claims 1 to 3, comprising at least one of blind opening / closing information and movement information of the passenger moving body.
  5. 旅客移動体の客室内に設置されたバックライトを備えた画像表示装置のバックライト制御方法であって、前記画像表示装置の表示画面の明るさに影響を与える前記旅客移動体の環境情報を取得する環境情報取得ステップと、取得した前記環境情報を解析して前記表示画面における明るさを推定する環境情報解析ステップと、前記環境情報解析ステップにより推定された前記表示画面の明るさから前記バックライトの輝度を算出するバックライト輝度算出ステップと、前記バックライト輝度算出ステップの算出値に基づき前記バックライトの輝度を設定するバックライト輝度設定ステップと、を備えた画像表示装置のバックライト制御方法。 A backlight control method for an image display device provided with a backlight installed in a passenger moving body, wherein the environmental information of the passenger moving body that affects the brightness of the display screen of the image display device is acquired. An environment information acquisition step, an environment information analysis step of analyzing the acquired environment information to estimate brightness on the display screen, and the backlight from the brightness of the display screen estimated by the environment information analysis step A backlight control method for an image display device, comprising: a backlight brightness calculation step that calculates the brightness of the backlight; and a backlight brightness setting step that sets the brightness of the backlight based on the calculated value of the backlight brightness calculation step.
  6. 前記環境情報解析ステップは、前記環境情報から前記画像表示装置の表示画面に対する複数の方向の明るさを推定し、前記推定された明るさに基づいて、前記バックライト輝度算出ステップは前記画像表示装置のバックライトの輝度を算出する請求項５に記載の画像表示装置のバックライト制御方法。 The environment information analysis step estimates brightness in a plurality of directions with respect to the display screen of the image display device from the environment information, and based on the estimated brightness, the backlight luminance calculation step includes the image display device. The backlight control method for an image display device according to claim 5, wherein the brightness of the backlight is calculated.
  7. 前記複数の方向は、前記画像表示装置の上、左右および正面の４つの方向である請求項６に記載の画像表示装置のバックライト制御方法。 The backlight control method for an image display device according to claim 6, wherein the plurality of directions are four directions of top, left and right, and front of the image display device.
  8. 前記環境情報は、前記旅客移動体の客室内に設置された照明器具の照明情報、前記画像表示装置の取付け情報、前記旅客移動体に配設された窓の位置情報、前記窓に備えられたブラインドの開閉情報、および前記旅客移動体の移動情報の少なくとも１つを含む請求項５～７のいずれか１項に記載の画像表示装置のバックライト制御方法。 The environmental information includes lighting information of lighting fixtures installed in a passenger cabin of the passenger moving body, mounting information of the image display device, position information of a window disposed in the passenger moving body, and the window. The backlight control method for an image display device according to any one of claims 5 to 7, comprising at least one of blind opening / closing information and movement information of the passenger moving body.
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CN114550674B (en) * 2020-11-26 2023-08-22 北京新能源汽车股份有限公司 Display screen brightness control method, device, equipment and automobile

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