JPH06261334A - Display luminance adjustment method for full color display device - Google Patents
Display luminance adjustment method for full color display deviceInfo
- Publication number
- JPH06261334A JPH06261334A JP5070706A JP7070693A JPH06261334A JP H06261334 A JPH06261334 A JP H06261334A JP 5070706 A JP5070706 A JP 5070706A JP 7070693 A JP7070693 A JP 7070693A JP H06261334 A JPH06261334 A JP H06261334A
- Authority
- JP
- Japan
- Prior art keywords
- color temperature
- color
- sensor
- illuminance
- brightness
- 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
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は表示部に例えばＲＧＢ三
原色のＬＥＤを組合せて構成されたフルカラー表示装置
に関するものであり、詳細には前記フルカラー表示装置
の表示部に外光の照度に基づく輝度調整を行うときの調
整方法に係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a full-color display device having a display unit in which LEDs of three primary colors of RGB are combined. The present invention relates to an adjustment method when performing adjustment.
【０００２】[0002]
【従来の技術】従来のこの種のフルカラー表示装置９０
においては図５に示すように例えばホトダイオードなど
による照度センサ９１を設け、この照度センサ９１によ
り得られた外光の照度に基づいて図６に示すように表示
部９２の前段に設けた輝度調整回路９３により表示部９
２の輝度を調整し、暗い環境で観視するときにもグレア
の発生などを防止し視認性の向上などを図るものとされ
ている。2. Description of the Related Art A conventional full-color display device 90 of this type.
5, an illuminance sensor 91 such as a photodiode is provided as shown in FIG. 5, and a brightness adjustment circuit provided in the preceding stage of the display unit 92 as shown in FIG. 6 based on the illuminance of external light obtained by the illuminance sensor 91. Display unit 9 by 93
It is said that the brightness of No. 2 is adjusted to prevent the occurrence of glare even when viewed in a dark environment to improve the visibility.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前記し
た従来のものは単純にＲＧＢ三色を同一比率で減衰させ
表示部９２の輝度を調整するのみのもの即ち、外光の明
暗に対応する補正しか行わないものであるので、外光の
色温度が極端に変化したときには観視者側の視感度の変
化により正常な色調での観視が不可能なものとなり、例
えば前記フルカラー表示装置が街頭宣伝用など悪条件下
で使用されるものである場合には、上記の問題を生じ易
く、結果として観視者に色ズレを感じさせる状態が多く
なり、品質感が低下する問題点を生じるものとなってい
る。However, the above-mentioned conventional ones merely adjust the brightness of the display section 92 by attenuating the three RGB colors at the same ratio, that is, the correction corresponding to the brightness of the outside light. Since it is not performed, when the color temperature of external light changes extremely, it becomes impossible to view in a normal color tone due to the change in the visual sensitivity of the viewer side. If the product is used under adverse conditions such as use, the above-mentioned problems are likely to occur, and as a result, there are many cases in which the viewer feels color misregistration, which causes a problem of deterioration in quality. Has become.
【０００４】また、前記した外光の色温度の問題がない
場合でも、観視者の視感度は輝度による影響を受け、表
示部の色温度を一定とした状態で外光に対応して輝度を
上下させると、低輝度側では青みが強く観視され、高輝
度側では赤みが強く観視されて見掛けの色温度が変化し
上記と同様な問題点を生じるものとなり、これらの点の
解決が課題とされるものとなっていた。Even if there is no problem with the color temperature of the outside light, the luminosity of the viewer is affected by the brightness, and the brightness corresponding to the outside light is maintained with the color temperature of the display unit kept constant. When you move up and down, blue is strongly viewed on the low brightness side, red is strongly viewed on the high brightness side, and the apparent color temperature changes, causing the same problems as above.Solution of these points Had become an issue.
【０００５】[0005]
【課題を解決するための手段】本発明は前記した従来の
課題を解決するための具体的な手段として、周囲の外光
が測定され、この外光の照度に基づいて表示部の輝度調
整が行われるフルカラー表示装置の表示輝度調整方法に
おいて、前記外光の測定はＲＧＢセンサで行われて照度
と色温度とが計測され、前記照度に基づいて前記フルカ
ラー表示装置の色温度を所定の変化率として表示部の輝
度調整を行うと共に、前記色温度に基づいて表示部の色
温度の調整も行うことを特徴とするフルカラー表示装置
の表示輝度調整方法を提供することで課題を解決するも
のである。As a concrete means for solving the above-mentioned conventional problems, the present invention measures the ambient external light and adjusts the brightness of the display unit based on the illuminance of the external light. In the method for adjusting display brightness of a full-color display device performed, the ambient light is measured by an RGB sensor to measure illuminance and color temperature, and the color temperature of the full-color display device is determined based on the illuminance by a predetermined change rate. As a result, the problem is solved by providing a display brightness adjusting method for a full-color display device, characterized in that the brightness of the display is adjusted as well as the color temperature of the display is adjusted based on the color temperature. .
【０００６】[0006]
【実施例】つぎに、本発明を図に示す一実施例に基づい
て詳細に説明する。図１に符号１で示すものは本発明に
係るフルカラー表示装置であり、このフルカラー表示装
置１には輝度センサが設けられて周囲の外光の照度が測
定され、この計測の結果により表示部３の輝度の調整が
行われるものである点は従来例のものと同様であるが、
本発明により前記輝度センサは、Ｒ（赤）光を測定する
Ｒセンサ２１、Ｇ（緑）光を測定するＧセンサ２２及
び、Ｂ（青）光を測定するＢセンサ２３とからなるＲＧ
Ｂセンサ２とされている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on an embodiment shown in the drawings. A reference numeral 1 in FIG. 1 is a full-color display device according to the present invention. The full-color display device 1 is provided with a luminance sensor to measure the illuminance of ambient external light, and the display unit 3 is obtained based on the measurement result. It is similar to the conventional example in that the brightness of is adjusted,
According to the present invention, the brightness sensor includes an R sensor 21 that measures R (red) light, a G sensor 22 that measures G (green) light, and a B sensor 23 that measures B (blue) light.
B sensor 2.
【０００７】図２は前記フルカラー表示装置１の表示部
３の輝度調整を行うときの回路の例を示すもので、本発
明により外光の明るさがＲＧＢセンサ２で測定されるも
のとされたことで、Ｒセンサ２１、Ｇセンサ２２、Ｂセ
ンサ２３からの出力は夫々にＡ／Ｄ変換器４でデジタル
変換が行われ、その後にマイクロコンピュータ５内で演
算が行われて、前記した外光の照度と色温度とが計測さ
れ、この結果に基づいて表示部３の輝度調整など補正が
行われる。FIG. 2 shows an example of a circuit for adjusting the brightness of the display section 3 of the full-color display device 1. According to the present invention, the brightness of external light is measured by the RGB sensor 2. As a result, the outputs from the R sensor 21, the G sensor 22, and the B sensor 23 are digitally converted by the A / D converter 4, respectively, and thereafter, the calculation is performed in the microcomputer 5 to obtain the above-mentioned external light. The illuminance and the color temperature are measured, and based on the results, corrections such as brightness adjustment of the display unit 3 are performed.
【０００８】ここで、先ず最初に前記ＲＧＢセンサ２で
計測された外光の照度値に対応する補正の方法について
説明する。図３は人間の視感度特性が明所と暗所では異
なるものとなることを示すグラフであり、図中に曲線Ｈ
で示す明所においては最大感度が波長０．５５μ付近に
あった視感度特性が、曲線Ｄで示す暗所においては最大
感度が波長０．５μ付近に移動し、結果として表示部３
の色温度を同一として輝度のみを低下させた場合には、
恰も色温度が上昇したかの印象を与えるものとなる。First, a correction method corresponding to the illuminance value of the external light measured by the RGB sensor 2 will be described. FIG. 3 is a graph showing that human luminosity characteristics differ between a bright place and a dark place.
In the dark place shown by the curve D, the maximum sensitivity was near the wavelength 0.55μ, and in the dark place shown in the curve D, the maximum sensitivity was moved to around the wavelength 0.5μ.
If the brightness is reduced with the same color temperature of,
It also gives the impression that the color temperature has risen.
【０００９】本発明では上記の点も鑑みて表示部３の輝
度調整を行うものであり、図４に示すように表示部３の
輝度調整を行うときには、前記表示部３に入力されるＲ
ＧＢ各信号の傾斜角にＲ信号＜Ｇ信号＜Ｂ信号となる差
を設け、輝度を低下させる程に色温度を低下させて、見
掛けの色温度の上昇を補正するものであり、このとき
に、前記表示部３の輝度は外光の照度と適宜な比率を有
するものとして眩惑の発生などを防止する。In the present invention, the brightness of the display unit 3 is adjusted in view of the above points, and when the brightness of the display unit 3 is adjusted as shown in FIG.
The difference of R signal <G signal <B signal is provided in the inclination angle of each GB signal, and the color temperature is lowered to such an extent that the brightness is lowered to correct the apparent rise of the color temperature. The brightness of the display unit 3 has an appropriate ratio with the illuminance of external light to prevent the occurrence of dazzling.
【００１０】また、本発明においては前記表示部３の色
温度の調整を外光の色温度に応じても補正を行うもので
あり、次いでその補正の方法について説明する。例えば
夕暮れ時など外光の色温度が低下した場合でも、人間は
既製観念に基づいて長波長（赤色）側の視感度を低下さ
せ例えば紙が白色と見えるようにする補正を行うものと
され、従って、外光の色温度が低下した場合には、同じ
色温度で表示されている表示部３は色温度が上昇したか
のように観視されるものとなる。Further, in the present invention, the color temperature of the display section 3 is adjusted also by the color temperature of the external light, and the method of the correction will be described. For example, even when the color temperature of outside light decreases at dusk, human beings are supposed to correct the long-wavelength (red) side visibility based on a ready-made idea so that paper looks white, for example. Therefore, when the color temperature of the external light is lowered, the display unit 3 displayed at the same color temperature is viewed as if the color temperature was raised.
【００１１】ここで、本発明においては外部照度の測定
のためのセンサとしてＲＧＢセンサ２を採用したことで
外光の照度と共に色温度の測定も可能とするものであ
り、基本的には標準的な観視状態（例えば、表示部３に
対し駆動が最大に行われている状態）においてＲＧＢセ
ンサ２により測定された色温度と同じとなるように表示
部３の色温度を補正し、外光が同一の色温度で照度を低
下していくときには、前記した標準的な状態から前記説
明のようにＲＧＢ三原色の傾斜角に差を設けた状態（図
４参照）で表示部３の輝度を低下させていく。Here, in the present invention, the RGB sensor 2 is adopted as a sensor for measuring the external illuminance, so that it is possible to measure the color temperature as well as the illuminance of the external light. The color temperature of the display unit 3 is corrected so as to be the same as the color temperature measured by the RGB sensor 2 in a normal viewing state (for example, the state where the display unit 3 is driven to the maximum), and the external light is emitted. When the illuminance is reduced at the same color temperature, the brightness of the display unit 3 is reduced in the state where the inclination angles of the RGB three primary colors are different from the standard state described above (see FIG. 4). I will let you.
【００１２】従って、本発明のフルカラー表示装置１に
おいては図２に示すように表示部３に入力されるＲ信
号、Ｇ信号、Ｂ信号の夫々を、ＲＧＢセンサ２の各セン
サ２１、２２、２３夫々からの出力に基づいてマイクロ
コンピュータ５で演算された色温度に基づいて色補正回
路６で補正すると共に、ＲＧＢセンサ２の各センサ２
１、２２、２３からの出力の和である外光の照度Ｌによ
っても補正を行うものとされ、これは、例えば色補正回
路６或いはマイクロコンピュータ５でＲＯＭに記録され
た補正テーブルを参照することで実行される。Therefore, in the full-color display device 1 of the present invention, as shown in FIG. 2, the R signal, the G signal, and the B signal input to the display unit 3 are supplied to the respective sensors 21, 22, 23 of the RGB sensor 2. The color correction circuit 6 performs correction based on the color temperature calculated by the microcomputer 5 based on the output from each of the sensors, and the sensors 2 of the RGB sensor 2
The correction is also performed by the illuminance L of the external light which is the sum of the outputs from 1, 22, and 23. For this, for example, refer to the correction table recorded in the ROM by the color correction circuit 6 or the microcomputer 5. Run on.
【００１３】尚、実際の実施に当たっては、例えば外光
の色温度に対して表示部３の色温度は１０００〜３００
０Ｋ（ケルビン）高めたものが好まれる場合が多いの
で、そのように変更を行うのは自在であり、これは前記
ＲＯＭ内の補正テーブルを変更することで容易に実施可
能である。In actual practice, the color temperature of the display unit 3 is 1000 to 300 with respect to the color temperature of external light, for example.
Since it is often preferred that 0K (Kelvin) is increased, such a change can be freely made, and this can be easily performed by changing the correction table in the ROM.
【００１４】[0014]
【発明の効果】以上に説明したように本発明により、外
光の測定はＲＧＢセンサで行われて照度と色温度とが計
測され、照度に基づいてフルカラー表示装置の色温度を
所定の変化率として表示部の輝度調整を行うと共に、前
記色温度に基づいて表示部の色温度の調整も行うフルカ
ラー表示装置の表示輝度調整方法としたことで、昼夜或
いは自然光、人工光など様々に変化する条件下に設置さ
れることが予想されるこの種のフルカラー表示装置に対
して、如何なる条件でも自動的に正常な色調で観視させ
るものとして補正し、品質感の低下を防止し性能向上に
極めて優れた効果を奏するものである。As described above, according to the present invention, the ambient light is measured by the RGB sensor to measure the illuminance and the color temperature, and based on the illuminance, the color temperature of the full-color display device is changed to a predetermined change rate. As a display brightness adjusting method for a full-color display device that adjusts the brightness of the display unit as well as adjusts the color temperature of the display unit based on the color temperature, conditions that change variously such as day and night or natural light, artificial light. This type of full-color display device that is expected to be installed underneath is automatically corrected to make it look in normal color under any conditions, preventing deterioration of quality and being extremely excellent in performance improvement. It has a great effect.
【図１】 本発明に係るフルカラー表示装置の表示輝度
調整方法の一実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of a display brightness adjusting method for a full-color display device according to the present invention.
【図２】 同じ実施例の回路の例を示す回路図である。FIG. 2 is a circuit diagram showing an example of a circuit of the same embodiment.
【図３】 人間の明暗による視感度特性の変化の状態を
示すグラフである。FIG. 3 is a graph showing the state of changes in the luminosity characteristics due to human brightness.
【図４】 同じ実施例の輝度調整の状態を示すグラフで
ある。FIG. 4 is a graph showing a state of brightness adjustment of the same example.
【図５】 従来例を示す斜視図である。FIG. 5 is a perspective view showing a conventional example.
【図６】 従来例の回路の例を示す回路図である。FIG. 6 is a circuit diagram showing an example of a conventional circuit.
１……フルカラー表示装置 ２……ＲＧＢセンサ ２１……Ｒセンサ ２２……Ｇセンサ ２３……Ｂセンサ ３……表示部 ４……Ａ／Ｄ変換器 ５……マイクロコンピュータ ６……色補正回路 Ｒ……Ｒ信号 Ｇ……Ｇ信号 Ｂ……Ｂ信号 1 ... Full color display device 2 ... RGB sensor 21 ... R sensor 22 ... G sensor 23 ... B sensor 3 ... Display unit 4 ... A / D converter 5 ... Microcomputer 6 ... Color correction circuit R ... R signal G ... G signal B ... B signal
Claims (1)
に基づいて表示部の輝度調整が行われるフルカラー表示
装置の表示輝度調整方法において、前記外光の測定はＲ
ＧＢセンサで行われて照度と色温度とが計測され、前記
照度に基づいて前記フルカラー表示装置の色温度を所定
の変化率として表示部の輝度調整を行うと共に、前記色
温度に基づいて表示部の色温度の調整も行うことを特徴
とするフルカラー表示装置の表示輝度調整方法。1. A display brightness adjusting method for a full-color display device, wherein ambient external light is measured, and the brightness of a display section is adjusted based on the illuminance of the external light.
The illuminance and the color temperature are measured by a GB sensor, the brightness of the display unit is adjusted based on the illuminance with the color temperature of the full-color display device as a predetermined change rate, and the display unit is based on the color temperature. A method for adjusting the display brightness of a full-color display device, which is characterized in that the color temperature of the device is also adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5070706A JPH06261334A (en) | 1993-03-08 | 1993-03-08 | Display luminance adjustment method for full color display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5070706A JPH06261334A (en) | 1993-03-08 | 1993-03-08 | Display luminance adjustment method for full color display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06261334A true JPH06261334A (en) | 1994-09-16 |
Family
ID=13439308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5070706A Pending JPH06261334A (en) | 1993-03-08 | 1993-03-08 | Display luminance adjustment method for full color display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06261334A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002351445A (en) * | 2001-05-30 | 2002-12-06 | Matsushita Electric Ind Co Ltd | Display device |
| JP2007036695A (en) * | 2005-07-27 | 2007-02-08 | Noritsu Koki Co Ltd | Color adjustment module and photograph print order processing apparatus assembled therewith |
| JP2008242354A (en) * | 2007-03-29 | 2008-10-09 | Canon Inc | Display device |
| JP2009117526A (en) * | 2007-11-05 | 2009-05-28 | Canon Inc | External light sensor module |
| JP2010124197A (en) * | 2008-11-19 | 2010-06-03 | Hitachi Ltd | Television device |
| JP2012003201A (en) * | 2010-06-21 | 2012-01-05 | Sharp Corp | Graphic display device |
| EP2654036A1 (en) | 2012-04-19 | 2013-10-23 | Fujitsu Limited | Information processing apparatus and display control method |
| CN111207826A (en) * | 2020-01-12 | 2020-05-29 | 东莞锐视光电科技有限公司 | Light source system with adjustable color temperature and illumination and adjusting method thereof |
-
1993
- 1993-03-08 JP JP5070706A patent/JPH06261334A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002351445A (en) * | 2001-05-30 | 2002-12-06 | Matsushita Electric Ind Co Ltd | Display device |
| JP2007036695A (en) * | 2005-07-27 | 2007-02-08 | Noritsu Koki Co Ltd | Color adjustment module and photograph print order processing apparatus assembled therewith |
| JP2008242354A (en) * | 2007-03-29 | 2008-10-09 | Canon Inc | Display device |
| JP2009117526A (en) * | 2007-11-05 | 2009-05-28 | Canon Inc | External light sensor module |
| JP2010124197A (en) * | 2008-11-19 | 2010-06-03 | Hitachi Ltd | Television device |
| US8390640B2 (en) | 2008-11-19 | 2013-03-05 | Hitachi Consumer Electronics Co., Ltd. | Television device for adjusting quality of video image to be displayed |
| JP2012003201A (en) * | 2010-06-21 | 2012-01-05 | Sharp Corp | Graphic display device |
| EP2654036A1 (en) | 2012-04-19 | 2013-10-23 | Fujitsu Limited | Information processing apparatus and display control method |
| US9024855B2 (en) | 2012-04-19 | 2015-05-05 | Fujitsu Limited | Information processing apparatus and display control method |
| CN111207826A (en) * | 2020-01-12 | 2020-05-29 | 东莞锐视光电科技有限公司 | Light source system with adjustable color temperature and illumination and adjusting method thereof |
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