JP2003167552A - Multi-color display - Google Patents
Multi-color displayInfo
- Publication number
- JP2003167552A JP2003167552A JP2001365617A JP2001365617A JP2003167552A JP 2003167552 A JP2003167552 A JP 2003167552A JP 2001365617 A JP2001365617 A JP 2001365617A JP 2001365617 A JP2001365617 A JP 2001365617A JP 2003167552 A JP2003167552 A JP 2003167552A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- brightness
- luminance
- light
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003086 colorant Substances 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 description 2
- 230000004310 photopic vision Effects 0.000 description 2
- 210000001525 retina Anatomy 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000004296 scotopic vision Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Led Device Packages (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複数色の発光体を
備えた発光素子からなる多色表示器に係り、特に表示器
の輝度を変化させても色相が変化することのない好適な
輝度調整を行うことのできる多色表示器に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multicolor display including a light emitting element having a plurality of color light emitters, and particularly to a preferable brightness that does not change the hue even when the brightness of the display is changed. The present invention relates to a multicolor display that can be adjusted.
【０００２】[0002]
【従来の技術】従来、赤色ＬＥＤと緑色ＬＥＤの２色の
ＬＥＤをマトリクス状に配列して屋外に設置される表示
器が存在している。この表示器は、各ＬＥＤを単独で表
示させることで赤色の表示と緑色の表示が得られるとと
もに、両方のＬＥＤを点灯させることで橙色の表示を行
うことができる。そして、このような屋外に設置される
表示器にあっては、視認性を向上させるために周囲の明
るさに応じて表示器の輝度を自動制御することが行われ
ている。すなわち、明るい昼間は周囲の明るさに埋もれ
ないようにするために表示器の輝度を上げ、また暗い夜
間は眩しくなりすぎないように表示器の輝度を下げてい
る。2. Description of the Related Art Conventionally, there is a display device in which two color LEDs, a red LED and a green LED, are arranged in a matrix and are installed outdoors. This display can display red and green by displaying each LED independently, and can display orange by turning on both LEDs. In such a display device installed outdoors, the brightness of the display device is automatically controlled according to the ambient brightness in order to improve the visibility. That is, the brightness of the display is raised in the bright daytime so as not to be buried in the surrounding brightness, and the brightness of the display is lowered in the dark night so as not to be too dazzling.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記表
示器にあっては明るい昼間と比較して、暗い夜間になる
と橙色表示の色相がなぜか青みがかったり、赤色と比較
して緑色の方が強く感じたりするという問題があった。However, in the above display, the hue of the orange display is bluish for some reason when compared to the bright daytime and darker night, and green is more strongly felt than red. There was a problem that
【０００４】そこで本発明は、表示器の輝度を変化させ
た場合でも表示色の色相を変化させることのない好適な
多色表示器の提供を目的とする。Therefore, an object of the present invention is to provide a suitable multicolor display which does not change the hue of the display color even when the brightness of the display is changed.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明の多色表示器は、色相の異なる複数種の発光
体を備えた発光素子と該発光素子の輝度を調整する制御
部とからなる多色表示器において、該制御部は、多色表
示器の輝度を下げる際には、上記発光体のうち波長の長
い光を発する発光体を波長の短い光を発する発光体より
も輝度を高めるとともに、多色表示器の輝度を上げる際
には、上記発光体のうち波長の短い光を発する発光体を
波長の長い光を発する発光体よりも輝度を高めるように
制御することを特徴とするものである。In order to achieve the above object, a multicolor display of the present invention comprises a light emitting element having a plurality of types of light emitting elements having different hues, and a control section for adjusting the brightness of the light emitting element. In the multi-color display device, the control unit controls the brightness of the light-emitting body, which emits light with a long wavelength, to be higher than that of light-emitting body that emits light with a short wavelength, when lowering the brightness of the multi-color display device. In order to increase the brightness of the multi-color display while increasing the brightness of the multi-color display, the light-emitting body that emits light with a short wavelength among the above-mentioned light-emitting bodies is controlled to have a higher brightness than that of a light-emitting body that emits light with a long wavelength. It is what
【０００６】また、発光素子は赤色発光体と緑色発光体
を備えるとともに、制御部が発光素子の輝度を変化させ
るに際し、緑色発光体の輝度変化勾配を赤色発光体の輝
度変化勾配よりも大きく設定することを特徴とするもの
である。Further, the light emitting element is provided with a red light emitting body and a green light emitting body, and when the control section changes the luminance of the light emitting element, the brightness change gradient of the green light emitting body is set to be larger than that of the red light emitting body. It is characterized by doing.
【０００７】[0007]
【発明の実施の形態】本発明の多色表示器について以下
に説明する。本発明の多色表示器は、赤色ＬＥＤと緑色
ＬＥＤを有する発光素子を縦横にマトリクス状に配設し
たもので、制御部により各発光素子を点灯制御すること
で表示体を形成し、かつ赤色ＬＥＤと緑色ＬＥＤを個別
に点灯制御することで表示体の発光色を決定している。
そしてこの制御部は、周囲の明るさに応じて見やすい表
示となるように自動的に表示器全体の輝度を制御してい
る。BEST MODE FOR CARRYING OUT THE INVENTION The multicolor display device of the present invention will be described below. The multi-color display of the present invention comprises light-emitting elements having red LEDs and green LEDs arranged in a matrix in the vertical and horizontal directions to form a display body by controlling lighting of the respective light-emitting elements by a control unit, and red The emission color of the display body is determined by individually controlling the lighting of the LED and the green LED.
Then, this control unit automatically controls the brightness of the entire display device so that the display is easy to see according to the brightness of the surroundings.
【０００８】本発明の多色表示器は、電磁波のなかで人
間の目が光として感じることのできる波長が３８０〜７
８０ｎｍの範囲における視感度特性に対応させるべく、
制御手段が発光素子を制御するものである。まず、人間
の目の視細胞には、網膜の中心に多く配置されていて波
長（色）に反応する錐体細胞と、網膜の周辺に多く配置
されていて光の量（明暗）に反応するかん体細胞とがあ
る。この内、錐体細胞は、図１の明所視における視感度
曲線に示すごとく、５５５ｎｍ付近の光（黄緑）に対す
る感度が高く（明るく感じる）、また、かん体細胞の方
は、図２の暗所視における視感度曲線に示すごとく、５
１０ｎｍ付近の光（緑）に対する感度が高いという特性
を有する。そして、錐体細胞は昼間働くのに対し、かん
体細胞は夜に働くものである。これにより、昼間は明る
い赤に見えていたものが、夕方になって暗くなるにつれ
赤が暗く見え、かつ青や緑が明るく見えるという現象が
生じるものであり、この現象をプルキンエ現象と称して
いる。The multicolor display of the present invention has a wavelength of 380 to 7 which human eyes can perceive as light in electromagnetic waves.
In order to correspond to the visibility characteristic in the range of 80 nm,
The control means controls the light emitting element. First, in human visual cells, there are cone cells that are located in the center of the retina and that respond to wavelength (color), and cone cells that are located around the retina and respond to the amount of light (dark and light). There are rod cells. Of these, cone cells are highly sensitive (feel bright) to light near 555 nm (yellowish green) as shown in the photopic curve in photopic vision in FIG. 1, and rod cells are more sensitive to light in FIG. As shown in the visibility curve in scotopic
It has a characteristic of high sensitivity to light (green) near 10 nm. And cone cells work in the daytime, whereas rod cells work in the night. As a result, what appears to be bright red in the daytime appears darker in the evening as it gets darker, and blue and green appear brighter.This phenomenon is called the Purkinje phenomenon. .
【０００９】そこで、本発明の多色表示器にあっては、
各発光素子の輝度を制御する制御部は、このプルキンエ
現象を考慮して、多色表示器全体の輝度を変化させる場
合に、各色の色相が変化しないように各発光素子の輝度
を制御するものである。具体的には、図３に示す色別輝
度変化のグラフ図に示すごとく、多色表示器における輝
度の基準を明るい昼間と暗い夜間の中間の明るさとした
場合に、明るい昼間は波長の長い赤色を波長の短い緑色
よりも人は強く感じることから、制御部は緑色ＬＥＤを
赤色ＬＥＤよりも輝度を高く設定し、逆に暗い夜間は緑
色を赤色よりも人は強く感じることから、制御部は赤色
ＬＥＤを緑色ＬＥＤよりも輝度を高く設定するものであ
る。すなわち、緑色ＬＥＤの輝度変化勾配は、赤色ＬＥ
Ｄの輝度変化勾配よりも傾斜を大きくするものである。Therefore, in the multicolor display of the present invention,
The control unit that controls the brightness of each light emitting element controls the brightness of each light emitting element so that the hue of each color does not change when the brightness of the entire multicolor display is changed in consideration of this Purkinje phenomenon. Is. Specifically, as shown in the graph of the change in luminance by color shown in FIG. 3, when the standard of the luminance in the multicolor display is the brightness between the bright daytime and the dark nighttime, the bright red color has a long wavelength. Since the person feels stronger than green, which has a short wavelength, the controller sets the green LED to have higher brightness than the red LED, and conversely, at dark night, people feel green stronger than red, so the controller The brightness of the red LED is set higher than that of the green LED. That is, the brightness change gradient of the green LED is red LE.
The inclination is made larger than the luminance change gradient of D.
【００１０】尚、上述した実施例にあっては発光素子の
色を赤色と緑色として説明したが、勿論これ以外の色の
発光素子を用いる場合であっても本発明の色別輝度変化
のグラフ図を利用することができるものであり、色ごと
に輝度変化特性を適宜設定するものである。In the above embodiments, the color of the light emitting elements was described as red and green, but of course, even when light emitting elements of other colors are used, the graph of the change in luminance according to the present invention is shown. The figure can be used, and the luminance change characteristic is appropriately set for each color.
【００１１】[0011]
【発明の効果】以上詳述した如く、本発明の多色表示器
によれば、色相の異なる複数種の発光体を備えた発光素
子と該発光素子の輝度を調整する制御部とからなる多色
表示器において、該制御部は、多色表示器の輝度を下げ
る際には、上記発光体のうち波長の長い光を発する発光
体を波長の短い光を発する発光体よりも輝度を高めると
ともに、多色表示器の輝度を上げる際には、上記発光体
のうち波長の短い光を発する発光体を波長の長い光を発
する発光体よりも輝度を高めるように制御することで、
周囲の明るさに合わせる等のために表示器の輝度を変化
させた場合でも、表示色の色相を変化することのない好
適な表示が得られるものである。As described in detail above, according to the multi-color display of the present invention, a multi-color display including a light-emitting element having a plurality of types of light-emitting elements having different hues and a controller for adjusting the brightness of the light-emitting element is provided. In the color display, the control unit, when lowering the brightness of the multi-color display, increases the brightness of the light-emitting body that emits light with a long wavelength among the above-mentioned light-emitting bodies and increases the brightness of the light-emitting body that emits light with a short wavelength. When increasing the brightness of a multi-color display device, by controlling the light-emitting body that emits light with a short wavelength among the above-mentioned light-emitting bodies to have a higher brightness than that of a light-emitting body that emits light with a long wavelength,
Even when the brightness of the display is changed to match the ambient brightness, a suitable display that does not change the hue of the display color can be obtained.
【００１２】また、発光素子は赤色発光体と緑色発光体
を備えるとともに、制御部が発光素子の輝度を変化させ
るに際し、緑色発光体の輝度変化勾配を赤色発光体の輝
度変化勾配よりも大きく設定することで、多色表示器全
体の輝度を下げる場合に緑色が強く感じられることな
く、また輝度を上げる場合に赤色が強く感じられること
なく自然な輝度変化が得られるものである。Further, the light emitting element includes a red light emitting body and a green light emitting body, and when the control section changes the luminance of the light emitting element, the brightness change gradient of the green light emitting body is set to be larger than the brightness change gradient of the red light emitting body. By doing so, when the brightness of the entire multicolor display is lowered, green is not strongly felt, and when the brightness is increased, red is not strongly felt, and a natural brightness change is obtained.
【図１】明所視での視感度曲線を示すグラフ図である。FIG. 1 is a graph showing a luminous sensitivity curve in photopic vision.
【図２】暗所視での視感度曲線を示すグラフ図である。FIG. 2 is a graph showing a visibility curve in scotopic vision.
【図３】本発明の多色表示器における色別輝度変化を示
すグラフ図である。FIG. 3 is a graph showing a change in luminance by color in the multicolor display device of the present invention.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5C080 AA07 BB05 CC03 DD03 EE28 EE30 JJ05 5F041 AA10 BB10 DB08 FF11 ─────────────────────────────────────────────────── ─── Continued front page F-term (reference) 5C080 AA07 BB05 CC03 DD03 EE28 EE30 JJ05 5F041 AA10 BB10 DB08 FF11
Claims (2)
光素子と該発光素子の輝度を調整する制御部とからなる
多色表示器において、該制御部は、多色表示器の輝度を
下げる際には、上記発光体のうち波長の長い光を発する
発光体を波長の短い光を発する発光体よりも輝度を高め
るとともに、多色表示器の輝度を上げる際には、上記発
光体のうち波長の短い光を発する発光体を波長の長い光
を発する発光体よりも輝度を高めるように制御すること
を特徴とする多色表示器。1. A multicolor display comprising a light emitting element having a plurality of types of light emitters having different hues and a control section for adjusting the brightness of the light emitting element, wherein the control section controls the brightness of the multicolor display. When lowering the luminance of the light emitting body that emits light of a long wavelength among the above-mentioned light emitting bodies, while increasing the luminance of the light emitting body that emits light of a short wavelength, and when raising the luminance of the multicolor display, A multicolor display characterized by controlling a light emitting body that emits light having a short wavelength to have higher brightness than a light emitting body that emits light having a long wavelength.
えるとともに、制御部が発光素子の輝度を変化させるに
際し、緑色発光体の輝度変化勾配を赤色発光体の輝度変
化勾配よりも大きく設定することを特徴とする請求項１
記載の多色表示器。2. The light emitting device comprises a red light emitting device and a green light emitting device, and when the control unit changes the brightness of the light emitting device, the brightness changing gradient of the green light emitting device is set to be larger than that of the red light emitting device. Claim 1 characterized by the above.
Multicolor display described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001365617A JP2003167552A (en) | 2001-11-30 | 2001-11-30 | Multi-color display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001365617A JP2003167552A (en) | 2001-11-30 | 2001-11-30 | Multi-color display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003167552A true JP2003167552A (en) | 2003-06-13 |
Family
ID=19175615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001365617A Pending JP2003167552A (en) | 2001-11-30 | 2001-11-30 | Multi-color display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003167552A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006039520A (en) * | 2004-06-21 | 2006-02-09 | Hitachi Displays Ltd | Liquid crystal display apparatus |
| JP2009235860A (en) * | 2008-03-28 | 2009-10-15 | Sekisui Jushi Co Ltd | Light-emitting visual guidance device |
| US7893903B2 (en) | 2004-06-21 | 2011-02-22 | Hitachi Displays, Ltd. | Liquid crystal display apparatus capable of maintaining high color purity |
-
2001
- 2001-11-30 JP JP2001365617A patent/JP2003167552A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006039520A (en) * | 2004-06-21 | 2006-02-09 | Hitachi Displays Ltd | Liquid crystal display apparatus |
| US7893903B2 (en) | 2004-06-21 | 2011-02-22 | Hitachi Displays, Ltd. | Liquid crystal display apparatus capable of maintaining high color purity |
| US8339356B2 (en) | 2004-06-21 | 2012-12-25 | Hitachi Displays, Ltd. | Liquid crystal display apparatus capable of maintaining high color purity |
| JP2009235860A (en) * | 2008-03-28 | 2009-10-15 | Sekisui Jushi Co Ltd | Light-emitting visual guidance device |
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