WO2014118920A1 - Display device - Google Patents

Display device Download PDF

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Publication number
WO2014118920A1
WO2014118920A1 PCT/JP2013/052085 JP2013052085W WO2014118920A1 WO 2014118920 A1 WO2014118920 A1 WO 2014118920A1 JP 2013052085 W JP2013052085 W JP 2013052085W WO 2014118920 A1 WO2014118920 A1 WO 2014118920A1
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WO
WIPO (PCT)
Prior art keywords
transmission amount
light transmission
unit
display device
light
Prior art date
Application number
PCT/JP2013/052085
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French (fr)
Japanese (ja)
Inventor
黒田　和男
Original Assignee
パイオニア株式会社
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Priority to PCT/JP2013/052085 priority Critical patent/WO2014118920A1/en
Publication of WO2014118920A1 publication Critical patent/WO2014118920A1/en

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    • 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
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0238—Improving the black level
    • 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
    • G09G2380/10—Automotive applications

Definitions

  • the present invention relates to a display device.
  • Patent Document 1 describes that an organic layer is used as an example of a light emitting layer of a light emitting panel.
  • Patent Document 1 further describes that optical films are provided on both sides of a light emitting panel from which light is emitted from both sides. These optical films are configured such that the directions of polarization of transmitted light are orthogonal to each other. Thus, it is described that the background of the light-emitting panel can be prevented from being seen through.
  • Patent Document 2 describes a display device in which a transmissive liquid crystal panel is disposed on a light source having a red LED (Light Emitting Diode), a green LED, and a blue LED. Patent Document 2 further describes that when red light intensity is calibrated, a red LED, a green LED, and a blue LED are driven in a time-sharing manner.
  • a red LED Light Emitting Diode
  • a green LED Green LED
  • a blue LED when red light intensity is calibrated, a red LED, a green LED, and a blue LED are driven in a time-sharing manner.
  • Thin display devices can be installed in various places. On the other hand, by installing the display device, the background of the display device cannot be seen. The present inventor has considered that if the background of the display device is visible, the degree of freedom of the installation location of the display device increases.
  • An example of a problem to be solved by the present invention is to make the background of a display device visible while suppressing unnecessary display and light leakage on the side opposite to the side on which information is to be displayed.
  • the invention according to claim 1 is a translucent surface display unit that displays information on the first surface side, A light transmission amount adjusting unit that is provided on the second surface side of the surface display unit and controls a light transmission amount; A control unit that controls the light transmission amount adjustment unit based on the timing at which the surface display unit emits light; It is a display apparatus provided with.
  • FIG. 1 is a diagram illustrating a configuration of a display device according to Example 1.
  • FIG. It is a figure which shows the 1st example of control of the light transmission amount adjustment part by a control part. It is a figure which shows the 2nd example of control of the light transmission amount adjustment part by a control part.
  • 6 is a diagram illustrating a usage mode of a display device according to Embodiment 2.
  • FIG. 6 is a cross-sectional view illustrating a configuration of a surface display unit and a light transmission amount adjustment unit included in a display device according to Example 3.
  • FIG. FIG. 10 is a diagram illustrating a configuration of a surface display unit and a light transmission amount adjustment unit included in a display device according to Example 4;
  • each component of the control unit 300 is not a hardware unit configuration but a functional unit block.
  • Each component of the control unit 300 is centered on an arbitrary computer CPU, memory, a program for realizing the components shown in the figure loaded in the memory, a storage medium such as a hard disk for storing the program, and a network connection interface. Realized by any combination of hardware and software. There are various modifications of the implementation method and apparatus.
  • FIG. 1 is a diagram illustrating a configuration of a display device 10 according to the embodiment.
  • the display device 10 is a device that displays information, for example, a moving image, a still image, or character information, and includes a surface display unit 100, a light transmission amount adjustment unit 200, and a control unit 300.
  • the surface display unit 100 is translucent and displays information on the first surface side.
  • the light transmission amount adjustment unit 200 is provided on the second surface side of the surface display unit 100 and controls the light transmission amount.
  • the control unit 300 controls the light transmission amount adjustment unit 200 based on the timing at which the surface display unit 100 emits light. Details will be described below.
  • the surface display unit 100 is an organic EL display panel, for example, but may display information by other methods such as a liquid crystal display panel.
  • the light transmission amount adjusting unit 200 has, for example, a liquid crystal.
  • the light transmission amount adjusting unit 200 controls the light transmission amount in the light transmission amount adjusting unit 200 by controlling the alignment direction of the liquid crystal.
  • the light transmission amount adjusting unit 200 may control the light transmission amount using a shutter driven by another method, for example, MEMS (Micro Electro Mechanical System).
  • the surface display unit 100 since the surface display unit 100 has translucency, a person on the first surface side of the surface display unit 100, that is, a side on which information is displayed, displays information on the surface display unit 100. When is not displayed and the light transmission amount of the light transmission amount adjustment unit 200 is large, the background of the surface display unit 100 can be seen. Further, the light transmission amount adjustment unit 200 is located on the second surface side of the surface display unit 100. For this reason, by appropriately performing control by the control unit 300, even if the surface display unit 100 has translucency, information on the second surface side of the surface display unit 100 is recognized in a mirror image state. This can be suppressed. Specifically, the control unit 300 controls the light transmission amount adjustment unit 200 based on the timing at which the surface display unit 100 emits light.
  • FIG. 2 is a diagram illustrating the configuration of the display device 10 according to the first embodiment.
  • the light transmission amount adjustment unit 200 includes a liquid crystal layer 210.
  • the light transmission amount adjusting unit 200 includes a liquid crystal layer 210 and polarizing units 232 and 234.
  • the liquid crystal layer 210 is located between the polarizing portions 232 and 234.
  • the polarization direction of the polarization unit 232 is orthogonal to the polarization direction of the polarization unit 234.
  • the liquid crystal layer 210 is sandwiched between the first electrode 222 and the second electrode 224.
  • the first electrode 222 and the second electrode 224 are connected to the control unit 300. That is, the alignment direction of the liquid crystal in the liquid crystal layer 210 is controlled by the control unit 300.
  • FIG. 3 is a diagram illustrating a first example of control of the light transmission amount adjustment unit 200 by the control unit 300.
  • the control unit 300 reduces the light transmission amount of the light transmission amount adjustment unit 200 (preferably the minimum value, for example, 5% or less) at the timing when the surface display unit 100 emits light.
  • the light transmission amount of the light transmission amount adjustment unit 200 is increased (preferably maximum). In this way, at the timing when the surface display unit 100 does not emit light, the person can recognize the background of the surface display unit 100 from both the first surface side and the second surface side of the surface display unit 100.
  • the surface display unit 100 is blinked at 30 Hz or higher, a person on the first surface side of the surface display unit 100 can recognize that the surface display unit 100 is continuously displaying information.
  • FIG. 4 is a diagram illustrating a second example of control of the light transmission amount adjustment unit 200 by the control unit 300.
  • the control unit 300 reduces the light transmission amount of the light transmission amount adjustment unit 200 before the timing at which the surface display unit 100 starts to emit light (preferably the minimum value, for example, 5% or less). Except for this point, it is the same as the example shown in FIG. In this way, for example, even if it takes time for the alignment direction of the liquid crystal to change after inputting a signal, it is possible to prevent light from being emitted from the second surface side of the surface display unit 100.
  • the light transmission amount adjusting unit 200 includes the liquid crystal layer 210 and the polarizing units 232 and 234. For this reason, the control part 300 can control the light transmittance of the light transmission amount adjustment part 200 easily.
  • FIG. 5 is a diagram illustrating a usage mode of the display device 10 according to the second embodiment.
  • the display device 10 is used as a navigation device in a vehicle, for example, an automobile.
  • the surface display unit 100 of the display device 10 is mounted on the dashboard 410, if the surface display unit 100 has translucency, the light from the surface display unit 100 is driven by the driver of the oncoming vehicle. Hinder.
  • the surface display unit 100 does not have translucency, the surface display unit 100 narrows the field of view when looking out from inside the vehicle.
  • the control unit 300 performs the control shown in FIG. 3 or FIG.
  • navigation information can be recognized by the driver of the vehicle to which the display device 10 is attached, and light from the surface display unit 100 can be suppressed from being recognized by the driver of the oncoming vehicle.
  • by increasing the transmission amount of the light transmission amount adjusting unit 200 while the surface display unit 100 is not displaying navigation information it is possible to suppress the surface display unit 100 from narrowing the field of view when looking outside from the inside of the vehicle. .
  • FIG. 6 is a cross-sectional view illustrating configurations of the surface display unit 100 and the light transmission amount adjustment unit 200 included in the display device 10 according to the third embodiment.
  • the display device 10 according to the present example has the same configuration as that of any of the embodiment and Examples 1 and 2 except for the configurations of the surface display unit 100 and the light transmission amount adjustment unit 200.
  • the surface display unit 100 is an active organic EL display device, and the organic functional layer 104 is divided into pixel units. That is, the surface display unit 100 has a plurality of light emitting elements (organic EL elements) arranged in a matrix.
  • a first electrode 102, an organic functional layer 104, a second electrode 106, and a switching element 125 are provided on the first surface side of a light transmitting substrate 110 (an example of a light transmitting layer) of the surface display unit 100. Film-Transistor)) and a wiring connected to the switching element 125 is formed.
  • the switching element 125 is controlled by the control unit 300.
  • an optical film such as an antireflection film such as a moth-eye structure or a light extraction film is attached to the second surface side of the translucent substrate 110, that is, the side opposite to the light emitting element.
  • the organic functional layer 104 has at least a hole injection layer, a light emitting layer, and an electron injection layer.
  • the organic functional layer 104 may further include at least one of a hole transport layer and an electron transport layer.
  • Each layer of the organic functional layer 104 may be formed by an evaporation method or may be formed by a coating method.
  • the surface display unit 100 may be a passive organic EL display device.
  • the light transmission amount adjusting unit 200 is divided into a plurality of regions.
  • the control unit 300 can individually control the light transmission amount of the light transmission amount adjustment unit 200 in each of the plurality of regions.
  • the second electrode 224 of the light transmission amount adjusting unit 200 is divided into pixel units of the surface display unit 100.
  • Each of the plurality of second electrodes 224 is connected to a switching element 225, for example, a TFT.
  • the switching element 225 is controlled by the control unit 300. That is, the light transmission amount adjustment unit 200 can control the light transmission amount in units of pixels of the surface display unit 100.
  • one second electrode 224 may have a shape and a size that cover a plurality of pixels of the surface display unit 100.
  • the control unit 300 corresponds to a part of the light transmission amount adjustment unit 200, specifically, the information display region of the surface display unit 100. Only in the region, the amount of transmitted light is reduced at the timing when the surface display unit 100 emits light. Then, the control unit 300 increases (for example, maximizes) the light transmission amount for other regions of the light transmission amount adjustment unit 200.
  • the same effect as that in any of the embodiment and Examples 1 and 2 can be obtained.
  • the control unit 300 displays only the part corresponding to the information display area of the surface display unit 100 in the light transmission amount adjustment unit 200.
  • the amount of transmitted light is reduced at the timing when light is emitted. For this reason, the area
  • the surface display unit 100 since the surface display unit 100 includes the optical path changing layer 112, the light extraction efficiency of the surface display unit 100 is increased.
  • FIG. 7 is a diagram illustrating configurations of the surface display unit 100 and the light transmission amount adjustment unit 200 included in the display device 10 according to the fourth embodiment.
  • the display device 10 according to the present embodiment has the same configuration as that of the third embodiment except for the configuration of the surface display unit 100.
  • the surface display unit 100 is a liquid crystal display panel, and includes a backlight 160, a diffusion layer 150, a liquid crystal layer 114, a filter layer 140, and polarizing units 132 and 134.
  • a first electrode 122 is provided on the first surface of the liquid crystal layer 114, and a second electrode 124 is provided on the second surface of the liquid crystal layer 114.
  • the second electrode 124 is divided into pixel units.
  • a wiring is connected to the second electrode 124 via a switching element 125.
  • the filter layer 140 is provided with a plurality of color filters 142. The color filter 142 overlaps the second electrode 124 in plan view.
  • the diffusion layer 150 is provided to diffuse the light from the backlight 160.
  • a plurality of slits 152 are provided in the diffusion layer 150.
  • the slit 152 is provided in order to give the surface display unit 100 translucency.
  • the filter layer 140 includes a region where the color filter 142 is not provided. Then, the light transmitted through the slit 152 passes through a region where the color filter 142 is not provided and each color filter 142, so that the background can be seen. Since other colors do not pass through the color filter 142, the light transmission efficiency decreases.
  • the slit 152 is also arranged in a portion where the color filter 142 is not provided. This region is at least a part of the light transmitting portion 101 of the surface display unit 100.
  • each color filter 142 and the color filter 142 are installed.
  • light from the background can be transmitted without being scattered.
  • the luminance dynamic range can be expanded by controlling the liquid crystal in the portion where the color filter 142 is not installed.
  • a liquid crystal display panel can be used as the translucent surface display unit 100.

Abstract

A display device (10) that displays information, such as moving images, still images, and character information, and which comprises a surface display unit (100), a light transmission amount adjustment unit (200), and a control unit (300). The surface display unit (100) is transparent and displays information on a first surface side. The light transmission amount adjustment unit (200) is provided on the second surface side of the surface display unit (100) and controls the amount of light transmitted. The control unit (300) controls the light transmission amount adjustment unit (200) on the basis of the timing that the surface display unit (100) emits light.

Description

表示装置Display device
　本発明は、表示装置に関する。 The present invention relates to a display device.
　近年は、有機ＥＬ（Organic Electroluminescence）表示装置や液晶表示装置など、薄型の表示装置が普及している。 In recent years, thin display devices such as organic EL (Organic Electroluminescence) display devices and liquid crystal display devices have become widespread.
　例えば特許文献１において、発光パネルの発光層の一例として有機層を用いることが記載されている。特許文献１には、さらに、両面から光が出射する発光パネルの両面に光学フィルムを設けることが記載されている。これら光学フィルムは、透過する光の偏光方向が互いに直交するようになっている。これにより、発光パネルの背景が透けて見えることを抑制できる、と記載されている。 For example, Patent Document 1 describes that an organic layer is used as an example of a light emitting layer of a light emitting panel. Patent Document 1 further describes that optical films are provided on both sides of a light emitting panel from which light is emitted from both sides. These optical films are configured such that the directions of polarization of transmitted light are orthogonal to each other. Thus, it is described that the background of the light-emitting panel can be prevented from being seen through.
　また特許文献２には、赤色のＬＥＤ（Light Emitting Diode）、緑色のＬＥＤ、及び青色のＬＥＤを有する光源の上に透過型の液晶パネルを配置した表示装置が記載されている。特許文献２には、さらに、ＬＥＤの発光強度をキャリブレーションする際に、赤色のＬＥＤ、緑色のＬＥＤ、及び青色のＬＥＤを時分割して駆動させることが記載されている。 Further, Patent Document 2 describes a display device in which a transmissive liquid crystal panel is disposed on a light source having a red LED (Light Emitting Diode), a green LED, and a blue LED. Patent Document 2 further describes that when red light intensity is calibrated, a red LED, a green LED, and a blue LED are driven in a time-sharing manner.
特開２００５－１９１０１５号公報JP 2005-191015 A 特開２００７－２６５９８４号公報JP 2007-265984 A
　薄型の表示装置は、様々な場所に設置することができる。一方で、表示装置を設置することにより、表示装置の背景は見えなくなる。本発明者は、表示装置の背景を見えるようにすると、表示装置の設置場所の自由度が増える、と考えた。 Thin display devices can be installed in various places. On the other hand, by installing the display device, the background of the display device cannot be seen. The present inventor has considered that if the background of the display device is visible, the degree of freedom of the installation location of the display device increases.
　本発明が解決しようとする課題としては、情報を表示すべき側とは逆側への不要な表示や光の漏洩をおさえつつ、表示装置の背景を見えるようにすることが一例として挙げられる。 An example of a problem to be solved by the present invention is to make the background of a display device visible while suppressing unnecessary display and light leakage on the side opposite to the side on which information is to be displayed.
　請求項１に記載の発明は、第１面側に情報を表示する透光性の面表示部と、
　前記面表示部の第２面側に設けられ、光の透過量を制御する光透過量調整部と、
　前記面表示部が発光するタイミングに基づいて前記光透過量調整部を制御する制御部と、
を備える表示装置である。 The invention according to claim 1 is a translucent surface display unit that displays information on the first surface side,
A light transmission amount adjusting unit that is provided on the second surface side of the surface display unit and controls a light transmission amount;
A control unit that controls the light transmission amount adjustment unit based on the timing at which the surface display unit emits light;
It is a display apparatus provided with.
　上述した目的、およびその他の目的、特徴および利点は、以下に述べる好適な実施の形態、およびそれに付随する以下の図面によってさらに明らかになる。 The above-described object and other objects, features, and advantages will be further clarified by a preferred embodiment described below and the following drawings attached thereto.
実施形態に係る表示装置の構成を示す図である。It is a figure which shows the structure of the display apparatus which concerns on embodiment. 実施例１に係る表示装置の構成を示す図である。1 is a diagram illustrating a configuration of a display device according to Example 1. FIG. 制御部による光透過量調整部の制御の第１例を示す図である。It is a figure which shows the 1st example of control of the light transmission amount adjustment part by a control part. 制御部による光透過量調整部の制御の第２例を示す図である。It is a figure which shows the 2nd example of control of the light transmission amount adjustment part by a control part. 実施例２に係る表示装置の使用態様を示す図である。6 is a diagram illustrating a usage mode of a display device according to Embodiment 2. FIG. 実施例３に係る表示装置が有する面表示部及び光透過量調整部の構成を示す断面図である。6 is a cross-sectional view illustrating a configuration of a surface display unit and a light transmission amount adjustment unit included in a display device according to Example 3. FIG. 実施例４に係る表示装置が有する面表示部及び光透過量調整部の構成を示す図である。FIG. 10 is a diagram illustrating a configuration of a surface display unit and a light transmission amount adjustment unit included in a display device according to Example 4;
　以下、本発明の実施の形態について、図面を用いて説明する。尚、すべての図面において、同様な構成要素には同様の符号を付し、適宜説明を省略する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.
　なお、以下に示す説明において、制御部３００の各構成要素は、ハードウエア単位の構成ではなく、機能単位のブロックを示している。制御部３００の各構成要素は、任意のコンピュータのＣＰＵ、メモリ、メモリにロードされた本図の構成要素を実現するプログラム、そのプログラムを格納するハードディスクなどの記憶メディア、ネットワーク接続用インタフェースを中心にハードウエアとソフトウエアの任意の組合せによって実現される。そして、その実現方法、装置には様々な変形例がある。 In the following description, each component of the control unit 300 is not a hardware unit configuration but a functional unit block. Each component of the control unit 300 is centered on an arbitrary computer CPU, memory, a program for realizing the components shown in the figure loaded in the memory, a storage medium such as a hard disk for storing the program, and a network connection interface. Realized by any combination of hardware and software. There are various modifications of the implementation method and apparatus.
　図１は、実施形態に係る表示装置１０の構成を示す図である。表示装置１０は情報、例えば動画、静止画、または文字情報などを表示する装置であり、面表示部１００、光透過量調整部２００、及び制御部３００を備える。面表示部１００は、透光性を有しており、第１面側に情報を表示する。光透過量調整部２００は、面表示部１００の第２面側に設けられ光の透過量を制御する。制御部３００は、面表示部１００が発光するタイミングに基づいて光透過量調整部２００を制御する。以下、詳細に説明する。 FIG. 1 is a diagram illustrating a configuration of a display device 10 according to the embodiment. The display device 10 is a device that displays information, for example, a moving image, a still image, or character information, and includes a surface display unit 100, a light transmission amount adjustment unit 200, and a control unit 300. The surface display unit 100 is translucent and displays information on the first surface side. The light transmission amount adjustment unit 200 is provided on the second surface side of the surface display unit 100 and controls the light transmission amount. The control unit 300 controls the light transmission amount adjustment unit 200 based on the timing at which the surface display unit 100 emits light. Details will be described below.
　面表示部１００は、例えば有機ＥＬ表示パネルであるが、液晶表示パネルなど、他の方式で情報を表示するものであってもよい。 The surface display unit 100 is an organic EL display panel, for example, but may display information by other methods such as a liquid crystal display panel.
　光透過量調整部２００は、例えば液晶を有している。この場合、光透過量調整部２００は、液晶の配向方向を制御することにより、光透過量調整部２００における光の透過量を制御する。ただし、光透過量調整部２００は、他の方式、例えばＭＥＭＳ（Micro Electro Mechanical System）で駆動するシャッターを用いて光の透過量を制御しても良い。 The light transmission amount adjusting unit 200 has, for example, a liquid crystal. In this case, the light transmission amount adjusting unit 200 controls the light transmission amount in the light transmission amount adjusting unit 200 by controlling the alignment direction of the liquid crystal. However, the light transmission amount adjusting unit 200 may control the light transmission amount using a shutter driven by another method, for example, MEMS (Micro Electro Mechanical System).
　本実施形態によれば、面表示部１００は透光性を有しているため、面表示部１００の第１面側、すなわち情報が表示される側にいる人は、面表示部１００に情報が表示されていないときかつ光透過量調整部２００における光の透過量が多い場合には面表示部１００の背景を見ることができる。また、面表示部１００の第２面側には光透過量調整部２００が位置している。このため、制御部３００による制御を適切に行うことにより、面表示部１００が透光性を有していても、面表示部１００の第２面側の人に情報が鏡像状態で認識されることを抑制できる。具体的には、制御部３００は、面表示部１００が発光するタイミングに基づいて、光透過量調整部２００を制御する。 According to the present embodiment, since the surface display unit 100 has translucency, a person on the first surface side of the surface display unit 100, that is, a side on which information is displayed, displays information on the surface display unit 100. When is not displayed and the light transmission amount of the light transmission amount adjustment unit 200 is large, the background of the surface display unit 100 can be seen. Further, the light transmission amount adjustment unit 200 is located on the second surface side of the surface display unit 100. For this reason, by appropriately performing control by the control unit 300, even if the surface display unit 100 has translucency, information on the second surface side of the surface display unit 100 is recognized in a mirror image state. This can be suppressed. Specifically, the control unit 300 controls the light transmission amount adjustment unit 200 based on the timing at which the surface display unit 100 emits light.
（実施例１）
　図２は、実施例１に係る表示装置１０の構成を示す図である。本実施例において、光透過量調整部２００は液晶層２１０を有している。詳細には、光透過量調整部２００は、液晶層２１０及び偏光部２３２，２３４を有している。液晶層２１０は、偏光部２３２，２３４の間に位置している。偏光部２３２の偏光方向は、偏光部２３４の偏光方向に直交している。また、液晶層２１０は第１電極２２２及び第２電極２２４によって狭持されている。そして第１電極２２２及び第２電極２２４は、制御部３００に接続されている。すなわち液晶層２１０における液晶の配向方向は、制御部３００によって制御される。 (Example 1)
FIG. 2 is a diagram illustrating the configuration of the display device 10 according to the first embodiment. In this embodiment, the light transmission amount adjustment unit 200 includes a liquid crystal layer 210. Specifically, the light transmission amount adjusting unit 200 includes a liquid crystal layer 210 and polarizing units 232 and 234. The liquid crystal layer 210 is located between the polarizing portions 232 and 234. The polarization direction of the polarization unit 232 is orthogonal to the polarization direction of the polarization unit 234. Further, the liquid crystal layer 210 is sandwiched between the first electrode 222 and the second electrode 224. The first electrode 222 and the second electrode 224 are connected to the control unit 300. That is, the alignment direction of the liquid crystal in the liquid crystal layer 210 is controlled by the control unit 300.
　図３は、制御部３００による光透過量調整部２００の制御の第１例を示す図である。本図に示す例において、制御部３００は、面表示部１００が発光するタイミングにおいては、光透過量調整部２００の光の透過量を少なくし（好ましくは最小値、例えば５％以下）、それ以外のタイミングにおいては、光透過量調整部２００の光の透過量を大きくする（好ましくは最大）。このようにすると、面表示部１００が発光しないタイミングにおいては、人は、面表示部１００の第１面側及び第２面側の双方から面表示部１００の背景を認識することができる。また、面表示部１００の第２面側（光透過量調整部２００が設けられている側）に面表示部１００からの光が出射することを抑制できる。そして、面表示部１００の第２面側にいる人には、面表示部１００の存在を意識させにくくすることができる。 FIG. 3 is a diagram illustrating a first example of control of the light transmission amount adjustment unit 200 by the control unit 300. In the example shown in the figure, the control unit 300 reduces the light transmission amount of the light transmission amount adjustment unit 200 (preferably the minimum value, for example, 5% or less) at the timing when the surface display unit 100 emits light. At other timings, the light transmission amount of the light transmission amount adjustment unit 200 is increased (preferably maximum). In this way, at the timing when the surface display unit 100 does not emit light, the person can recognize the background of the surface display unit 100 from both the first surface side and the second surface side of the surface display unit 100. Moreover, it can suppress that the light from the surface display part 100 radiate | emits to the 2nd surface side (side in which the light transmission amount adjustment part 200 is provided) of the surface display part 100. FIG. Then, it is possible to make it difficult for a person on the second surface side of the surface display unit 100 to be aware of the presence of the surface display unit 100.
　さらに、面表示部１００を３０Ｈｚ以上で点滅させた場合、面表示部１００の第１面側にいる人には面表示部１００が連続して情報を表示していると認識させることができる。 Furthermore, when the surface display unit 100 is blinked at 30 Hz or higher, a person on the first surface side of the surface display unit 100 can recognize that the surface display unit 100 is continuously displaying information.
　図４は、制御部３００による光透過量調整部２００の制御の第２例を示す図である。本図に示す例は、制御部３００が、面表示部１００の発光が開始するタイミングよりも前に、光透過量調整部２００の光透過量を少なく（好ましくは最小値、例えば５％以下）する点を除いて、図３に示した例と同様である。このようにすると、例えば信号を入力してから液晶の配向方向が変化するまでに時間を要しても、面表示部１００の第２面側から光が出射されることを抑制できる。 FIG. 4 is a diagram illustrating a second example of control of the light transmission amount adjustment unit 200 by the control unit 300. In the example shown in this figure, the control unit 300 reduces the light transmission amount of the light transmission amount adjustment unit 200 before the timing at which the surface display unit 100 starts to emit light (preferably the minimum value, for example, 5% or less). Except for this point, it is the same as the example shown in FIG. In this way, for example, even if it takes time for the alignment direction of the liquid crystal to change after inputting a signal, it is possible to prevent light from being emitted from the second surface side of the surface display unit 100.
　本実施例によれば、光透過量調整部２００は、液晶層２１０及び偏光部２３２，２３４を有している。このため、制御部３００は、容易に光透過量調整部２００の光透過率を制御することができる。 According to the present embodiment, the light transmission amount adjusting unit 200 includes the liquid crystal layer 210 and the polarizing units 232 and 234. For this reason, the control part 300 can control the light transmittance of the light transmission amount adjustment part 200 easily.
（実施例２）
　図５は、実施例２に係る表示装置１０の使用態様を示す図である。本実施例において表示装置１０は、車両、例えば自動車内でナビゲーション装置として使用される。表示装置１０の面表示部１００がダッシュボード４１０上に取り付けられた場合、面表示部１００が透光性を有していると、対向車の運転手にとって面表示部１００からの光が運転の妨げになる。一方、面表示部１００が透光性を有していない場合、車内から外を見るときに面表示部１００が視界を狭める。 (Example 2)
FIG. 5 is a diagram illustrating a usage mode of the display device 10 according to the second embodiment. In this embodiment, the display device 10 is used as a navigation device in a vehicle, for example, an automobile. When the surface display unit 100 of the display device 10 is mounted on the dashboard 410, if the surface display unit 100 has translucency, the light from the surface display unit 100 is driven by the driver of the oncoming vehicle. Hinder. On the other hand, when the surface display unit 100 does not have translucency, the surface display unit 100 narrows the field of view when looking out from inside the vehicle.
　これに対して本実施例では、制御部３００は、図３又は図４に示した制御を行う。このため、表示装置１０が取り付けられた車両の運転手にナビゲーション情報を認識させることができ、かつ面表示部１００からの光が対向車の運転手に認識されることを抑制できる。また、面表示部１００がナビゲーション情報を表示していない間、光透過量調整部２００の透過量を大きくすることで、車内から外を見るときに面表示部１００が視界を狭めることを抑制できる。 In contrast, in the present embodiment, the control unit 300 performs the control shown in FIG. 3 or FIG. For this reason, navigation information can be recognized by the driver of the vehicle to which the display device 10 is attached, and light from the surface display unit 100 can be suppressed from being recognized by the driver of the oncoming vehicle. Further, by increasing the transmission amount of the light transmission amount adjusting unit 200 while the surface display unit 100 is not displaying navigation information, it is possible to suppress the surface display unit 100 from narrowing the field of view when looking outside from the inside of the vehicle. .
（実施例３）
　図６は、実施例３に係る表示装置１０が有する面表示部１００及び光透過量調整部２００の構成を示す断面図である。本実施例に係る表示装置１０は、面表示部１００及び光透過量調整部２００の構成を除いて、実施形態及び実施例１，２のいずれかと同様の構成である。 (Example 3)
FIG. 6 is a cross-sectional view illustrating configurations of the surface display unit 100 and the light transmission amount adjustment unit 200 included in the display device 10 according to the third embodiment. The display device 10 according to the present example has the same configuration as that of any of the embodiment and Examples 1 and 2 except for the configurations of the surface display unit 100 and the light transmission amount adjustment unit 200.
　本図に示す例において、面表示部１００はアクティブ型の有機ＥＬ表示装置であり、有機機能層１０４が画素単位に分かれている。すなわち面表示部１００は、マトリクス状に配置された複数の発光素子（有機ＥＬ素子）を有している。そして面表示部１００の透光性基板１１０（透光性層の一例）の第１面側には、第１電極１０２、有機機能層１０４、第２電極１０６、スイッチング素子１２５（例えばＴＦＴ（Thin Film Transistor））、及びスイッチング素子１２５に接続する配線が形成されている。スイッチング素子１２５は、制御部３００によって制御される。また透光性基板１１０の第２面側すなわち発光素子とは逆側には、光路変更層１１２、例えばモスアイ構造などの反射防止フィルム又は光取出フィルムなどの光学フィルムが取り付けられている。 In the example shown in the figure, the surface display unit 100 is an active organic EL display device, and the organic functional layer 104 is divided into pixel units. That is, the surface display unit 100 has a plurality of light emitting elements (organic EL elements) arranged in a matrix. A first electrode 102, an organic functional layer 104, a second electrode 106, and a switching element 125 (for example, TFT (Thin)) are provided on the first surface side of a light transmitting substrate 110 (an example of a light transmitting layer) of the surface display unit 100. Film-Transistor)) and a wiring connected to the switching element 125 is formed. The switching element 125 is controlled by the control unit 300. Further, an optical film such as an antireflection film such as a moth-eye structure or a light extraction film is attached to the second surface side of the translucent substrate 110, that is, the side opposite to the light emitting element.
　有機機能層１０４は、正孔注入層、発光層、及び電子注入層を少なくとも有している。有機機能層１０４は、さらに正孔輸送層及び電子輸送層の少なくとも一方を有していても良い。有機機能層１０４の各層は、蒸着法によって形成されていても良いし、塗布法によって形成されていても良い。 The organic functional layer 104 has at least a hole injection layer, a light emitting layer, and an electron injection layer. The organic functional layer 104 may further include at least one of a hole transport layer and an electron transport layer. Each layer of the organic functional layer 104 may be formed by an evaporation method or may be formed by a coating method.
　なお、面表示部１００はパッシブ型の有機ＥＬ表示装置であっても良い。 The surface display unit 100 may be a passive organic EL display device.
　また光透過量調整部２００は、複数の領域に分割されている。そして制御部３００は、光透過量調整部２００の光透過量を、複数の領域のそれぞれで個別に制御することができる。本図に示す例では、光透過量調整部２００の第２電極２２４は面表示部１００の画素単位に分かれている。そして複数の第２電極２２４の各々は、スイッチング素子２２５、例えばＴＦＴに接続されている。スイッチング素子２２５は、制御部３００によって制御される。すなわち光透過量調整部２００は、面表示部１００の画素単位で光透過量を制御することができる。ただし、一つの第２電極２２４は、面表示部１００の複数の画素を覆う形状及び大きさになっていても良い。 The light transmission amount adjusting unit 200 is divided into a plurality of regions. The control unit 300 can individually control the light transmission amount of the light transmission amount adjustment unit 200 in each of the plurality of regions. In the example shown in the drawing, the second electrode 224 of the light transmission amount adjusting unit 200 is divided into pixel units of the surface display unit 100. Each of the plurality of second electrodes 224 is connected to a switching element 225, for example, a TFT. The switching element 225 is controlled by the control unit 300. That is, the light transmission amount adjustment unit 200 can control the light transmission amount in units of pixels of the surface display unit 100. However, one second electrode 224 may have a shape and a size that cover a plurality of pixels of the surface display unit 100.
　そして面表示部１００の一部の領域にのみ情報が表示されている場合、制御部３００は、光透過量調整部２００の一部、具体的には面表示部１００の情報表示領域に対応する領域のみ、面表示部１００が発光するタイミングにおいて光の透過量を少なくする。そして制御部３００は、光透過量調整部２００の他の領域については、光の透過量を大きく（例えば最大に）する。 When information is displayed only in a partial region of the surface display unit 100, the control unit 300 corresponds to a part of the light transmission amount adjustment unit 200, specifically, the information display region of the surface display unit 100. Only in the region, the amount of transmitted light is reduced at the timing when the surface display unit 100 emits light. Then, the control unit 300 increases (for example, maximizes) the light transmission amount for other regions of the light transmission amount adjustment unit 200.
　本実施例によっても、実施形態及び実施例１，２のいずれかと同様の効果を得ることができる。また、制御部３００は、面表示部１００の一部にのみ情報が表示されている場合、光透過量調整部２００のうち面表示部１００の情報表示領域に対応する部分のみ、面表示部１００が発光するタイミングにおいて光の透過量を少なくする。このため、面表示部１００のうち光透過量調整部２００によって透光性が失われる領域を狭くすることができる。 Also in this example, the same effect as that in any of the embodiment and Examples 1 and 2 can be obtained. In addition, when information is displayed only on a part of the surface display unit 100, the control unit 300 displays only the part corresponding to the information display area of the surface display unit 100 in the light transmission amount adjustment unit 200. The amount of transmitted light is reduced at the timing when light is emitted. For this reason, the area | region where translucency is lost by the light transmission amount adjustment part 200 among the surface display parts 100 can be narrowed.
　また、面表示部１００は光路変更層１１２を有しているため、面表示部１００の光取出効率は高くなる。 In addition, since the surface display unit 100 includes the optical path changing layer 112, the light extraction efficiency of the surface display unit 100 is increased.
（実施例４）
　図７は、実施例４に係る表示装置１０が有する面表示部１００及び光透過量調整部２００の構成を示す図である。本実施例に係る表示装置１０は、面表示部１００の構成を除いて、実施例３と同様の構成である。 Example 4
FIG. 7 is a diagram illustrating configurations of the surface display unit 100 and the light transmission amount adjustment unit 200 included in the display device 10 according to the fourth embodiment. The display device 10 according to the present embodiment has the same configuration as that of the third embodiment except for the configuration of the surface display unit 100.
　面表示部１００は液晶表示パネルであり、バックライト１６０、拡散層１５０、液晶層１１４、フィルタ層１４０、及び偏光部１３２，１３４を有している。液晶層１１４の第１面には第１電極１２２が設けられており、液晶層１１４の第２面には第２電極１２４が設けられている。第２電極１２４は画素単位に分割されている。そして第２電極１２４には、スイッチング素子１２５を介して配線が接続されている。またフィルタ層１４０には、複数のカラーフィルタ１４２が設けられている。カラーフィルタ１４２は、平面視で第２電極１２４と重なっている。 The surface display unit 100 is a liquid crystal display panel, and includes a backlight 160, a diffusion layer 150, a liquid crystal layer 114, a filter layer 140, and polarizing units 132 and 134. A first electrode 122 is provided on the first surface of the liquid crystal layer 114, and a second electrode 124 is provided on the second surface of the liquid crystal layer 114. The second electrode 124 is divided into pixel units. A wiring is connected to the second electrode 124 via a switching element 125. The filter layer 140 is provided with a plurality of color filters 142. The color filter 142 overlaps the second electrode 124 in plan view.
　拡散層１５０は、バックライト１６０の光を拡散させるために設けられている。そして拡散層１５０には、複数のスリット１５２が設けられている。スリット１５２は、面表示部１００に透光性を持たせるために設けられている。またフィルタ層１４０には、カラーフィルタ１４２が設けられていない領域がある。そして、スリット１５２を透過した光がカラーフィルタ１４２が設けられていない領域及び各カラーフィルタ１４２を透過することにより、背景を見ることが出来る。なお、カラーフィルタ１４２を通ると他の色は透過しないので、光の透過効率が低下する。それを改善するために、カラーフィルタ１４２を設けていない部分にもスリット１５２を配置している。この領域は、面表示部１００の透光部１０１の少なくとも一部となる。 The diffusion layer 150 is provided to diffuse the light from the backlight 160. A plurality of slits 152 are provided in the diffusion layer 150. The slit 152 is provided in order to give the surface display unit 100 translucency. Further, the filter layer 140 includes a region where the color filter 142 is not provided. Then, the light transmitted through the slit 152 passes through a region where the color filter 142 is not provided and each color filter 142, so that the background can be seen. Since other colors do not pass through the color filter 142, the light transmission efficiency decreases. In order to improve it, the slit 152 is also arranged in a portion where the color filter 142 is not provided. This region is at least a part of the light transmitting portion 101 of the surface display unit 100.
　また、カラーフィルタ１４２およびカラーフィルタ１４２を設置していない部分には拡散層１５０がない（スリット１５２がある）ので、バックライト１６０の発光時には、光を各カラーフィルタ１４２およびカラーフィルタ１４２を設置していない部分に当てることができ、かつ、バックライト１６０の非発光時には、背景からの光を散乱することなく透過させることができる。 In addition, since the color filter 142 and the portion where the color filter 142 is not provided do not have the diffusion layer 150 (there is a slit 152), when the backlight 160 emits light, each color filter 142 and the color filter 142 are installed. When the backlight 160 is not emitting light, light from the background can be transmitted without being scattered.
　さらに、バックライト１６０の発光時に、カラーフィルタ１４２が設置していない部分の液晶を制御することにより、輝度のダイナミックレンジを拡大することも可能である。 Furthermore, when the backlight 160 emits light, the luminance dynamic range can be expanded by controlling the liquid crystal in the portion where the color filter 142 is not installed.
　本実施例によれば、拡散層１５０にスリット１５２を設けているため、透光性の面表示部１００として液晶表示パネルを用いることができる。 According to this embodiment, since the slit 152 is provided in the diffusion layer 150, a liquid crystal display panel can be used as the translucent surface display unit 100.
　以上、図面を参照して実施形態及び実施例について述べたが、これらは本発明の例示であり、上記以外の様々な構成を採用することもできる。 As mentioned above, although embodiment and the Example were described with reference to drawings, these are the illustrations of this invention, Various structures other than the above are also employable.

Claims (7)

  1. 　第１面側に情報を表示する透光性の面表示部と、
    　前記面表示部の第２面側に設けられ、光の透過量を制御する光透過量調整部と、
    　前記面表示部が発光するタイミングに基づいて前記光透過量調整部を制御する制御部と、
    を備える表示装置。     A translucent surface display unit for displaying information on the first surface side;
    A light transmission amount adjusting unit that is provided on the second surface side of the surface display unit and controls a light transmission amount;
    A control unit that controls the light transmission amount adjustment unit based on the timing at which the surface display unit emits light;
    A display device comprising:
  2. 　請求項１に記載の表示装置において、
    　前記制御部は、
    　　前記面表示部が発光するタイミングにおいて、前記光透過量調整部の光の透過量を少なくし、
    　　前記面表示部が発光しないタイミングにおいて、前記光透過量調整部の光の透過量を大きくする表示装置。     The display device according to claim 1,
    The controller is
    At the timing when the surface display unit emits light, the light transmission amount of the light transmission amount adjustment unit is reduced,
    A display device that increases a light transmission amount of the light transmission amount adjustment unit at a timing when the surface display unit does not emit light.
  3. 　請求項２に記載の表示装置において、
    　前記制御部は、前記面表示部の発光タイミングの開始前から、前記光透過量調整部の光の透過量を少なくする表示装置。     The display device according to claim 2,
    The said control part is a display apparatus which reduces the light transmission amount of the said light transmission amount adjustment part from the start of the light emission timing of the said surface display part.
  4. 　請求項２又は３に記載の表示装置において、
    　前記光透過量調整部は、複数の領域に分割されており、
    　前記制御部は、前記光透過量調整部の前記複数の領域における光透過量を個別に制御し、かつ、前記面表示部の一部のみに情報が表示されている場合には、前記複数の領域のうち前記表示装置の前記一部に対応する領域の光の透過量を、前記面表示部が発光するタイミングにおいて少なくする表示装置。     The display device according to claim 2 or 3,
    The light transmission amount adjustment unit is divided into a plurality of regions,
    The control unit individually controls the light transmission amount in the plurality of regions of the light transmission amount adjustment unit, and when the information is displayed only on a part of the surface display unit, A display device that reduces a light transmission amount of a region corresponding to the part of the display device in the region at a timing when the surface display unit emits light.
  5. 　請求項１～４のいずれか一項に記載の表示装置において、
    　前記面表示部は、
    　　透光性基板と、
    　　前記透光性基板の第１面側にマトリクス状に配置された複数の発光素子と、
    　　前記透光性基板の第2面側に設けられた光路変更層と、
    を備え、
    　前記光透過量調整部は、前記複数の発光素子を基準として前記透光性基板とは逆側に設けられている表示装置。     The display device according to any one of claims 1 to 4,
    The surface display unit is
    A translucent substrate;
    A plurality of light emitting elements arranged in a matrix on the first surface side of the translucent substrate;
    An optical path changing layer provided on the second surface side of the translucent substrate;
    With
    The light transmission amount adjusting unit is a display device provided on a side opposite to the light transmitting substrate with the plurality of light emitting elements as a reference.
  6. 　請求項１～４のいずれか一項に記載の表示装置において、
    　前記面表示部は、液晶表示部であり、
    　前記液晶表示部は、
    　　バックライトと、
    　　前記バックライトの光を散乱させる拡散板と、
    を備え、
    　前記拡散板には複数のスリットが設けられている表示装置。     The display device according to any one of claims 1 to 4,
    The surface display unit is a liquid crystal display unit,
    The liquid crystal display unit
    With backlight,
    A diffuser that scatters the light of the backlight;
    With
    A display device in which the diffusion plate is provided with a plurality of slits.
  7. 　請求項１～６のいずれか一項に記載の表示装置において、
    　前記光透過量調整部は、
    　２つの偏光層と
    　前記２つの偏光層の間に位置する液晶層と、
    を備える表示装置。     The display device according to any one of claims 1 to 6,
    The light transmission amount adjusting unit is
    Two polarizing layers and a liquid crystal layer positioned between the two polarizing layers;
    A display device comprising:
PCT/JP2013/052085 2013-01-30 2013-01-30 Display device WO2014118920A1 (en)

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JP2017097377A (en) * 2013-03-27 2017-06-01 株式会社半導体エネルギー研究所 Display panel and display device

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JP2002311412A (en) * 2001-04-17 2002-10-23 Matsushita Electric Ind Co Ltd Liquid crystal display device
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