JPH05100652A - Brightness characteristic controller for display unit - Google Patents
Brightness characteristic controller for display unitInfo
- Publication number
- JPH05100652A JPH05100652A JP3284098A JP28409891A JPH05100652A JP H05100652 A JPH05100652 A JP H05100652A JP 3284098 A JP3284098 A JP 3284098A JP 28409891 A JP28409891 A JP 28409891A JP H05100652 A JPH05100652 A JP H05100652A
- Authority
- JP
- Japan
- Prior art keywords
- brightness
- voltage
- output
- input
- 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.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 claims description 53
- 238000001514 detection method Methods 0.000 claims description 13
- 238000010586 diagram Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Television Receiver Circuits (AREA)
- Controls And Circuits For Display Device (AREA)
- Instrument Panels (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、車両、航空機等の操縦
室又は操縦席における表示器の制御装置に係り、特に周
囲の明るさが大幅に変化するような状況下での表示器の
輝度を適性に調整することができる表示器の輝度特性制
御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a display in a cockpit or cockpit of a vehicle, an aircraft, etc., and particularly to a brightness of the display under a situation where the ambient brightness changes significantly. The present invention relates to a brightness characteristic control device for a display capable of appropriately adjusting the brightness.
【０００２】[0002]
【従来の技術】一般に、車両、航空機等の操縦室又は操
縦席における表示器は、昼間の直射日光下から夜間の光
のほとんどない状況下まで周囲の明るさが大幅に変化す
る条件で使用されるものである。2. Description of the Related Art Generally, an indicator in a cockpit or a cockpit of a vehicle, an aircraft or the like is used under the condition that the ambient brightness greatly changes from the direct sunlight in the daytime to the situation in which there is little light at night. It is something.
【０００３】このような条件下において、従来の表示器
の輝度調整は、周囲の明るさが暗い時は輝度電圧の低い
領域で分解能を上げ、明るい時は表示器の明るさを更に
明るくするために最高輝度電圧を出力できるように、図
３に示すような輝度特性（入出力特性）を選択して行わ
れていた。Under such a condition, in the brightness adjustment of the conventional display device, the resolution is increased in the low brightness voltage region when the ambient brightness is dark, and the brightness of the display device is further brightened when the brightness is bright. In order to output the highest luminance voltage, the luminance characteristic (input / output characteristic) as shown in FIG. 3 has been selected.
【０００４】具体的な従来の表示器の輝度特性制御装置
では、光量検出回路（ＡＢＤ）等で周囲の明るさを検出
し、この明るさに対応した電圧（Ｖ1 in）が光量検出回
路等から出力され、更にアナログ／デジタル（Ａ／Ｄ）
変換されて図３の入出力特性を持った符号変換回路（Ｃ
ＯＤＥＲ）に入力される。そして、輝度の調節を行う可
変抵抗等から成る輝度調節器（ボリュ−ム）のつまみを
動作させて、任意の電圧（Ｖ2 in）を出力させ、Ａ／Ｄ
変換を行って上記符号変換回路に与えられるようになっ
ている。In a specific conventional brightness characteristic control device for a display, a light amount detection circuit (ABD) or the like detects ambient brightness, and a voltage (V1 in) corresponding to this brightness is output from the light amount detection circuit or the like. Output, and also analog / digital (A / D)
A code conversion circuit (C that has been converted and has the input / output characteristics of FIG. 3)
ODER). Then, by operating the knob of the brightness adjuster (volume) which is composed of a variable resistor for adjusting the brightness, an arbitrary voltage (V2 in) is output, and the A / D
The code is converted and supplied to the code conversion circuit.
【０００５】すると、符号変換回路は、与えられた電圧
Ｖ1 inの値により輝度特性（入出力特性）を選択し、こ
の選択された入出力特性に従って電圧Ｖ2 inの値を出力
電圧（Ｖ out）に変換して出力するようになっていた。
尚、この出力電圧（Ｖ out）が輝度電圧となるものであ
り、入出力特性が電圧Ｖ2 inの値を出力電圧（Ｖ out）
に変換する変換特性となるものである。Then, the code conversion circuit selects the brightness characteristic (input / output characteristic) according to the value of the applied voltage V1 in, and the value of the voltage V2 in according to the selected input / output characteristic is output voltage (V out). It was supposed to be converted to and output.
The output voltage (V out) is the luminance voltage, and the input / output characteristic is the value of the voltage V 2 in that is the output voltage (V out).
It becomes a conversion characteristic that is converted into.
【０００６】ここで、従来の符号変換回路における輝度
特性（入出力特性）について、図３を使って具体的に説
明する。図３は、従来の表示器の輝度特性制御装置にお
ける輝度特性（入出力特性）を表わす図である。図３に
おいて、横軸をボリュ−ムから与えられる電圧（Ｖ2 i
n）とし、縦軸を出力電圧（Ｖ out）としている。Here, the brightness characteristic (input / output characteristic) in the conventional code conversion circuit will be specifically described with reference to FIG. FIG. 3 is a diagram showing a luminance characteristic (input / output characteristic) in a conventional luminance characteristic control device for a display. In FIG. 3, the horizontal axis represents the voltage (V2 i
n) and the vertical axis is the output voltage (V out).
【０００７】表示器周辺の明るさが明るい時は、光量検
出回路で得られる電圧Ｖ1 inが大きくなり、暗い時は、
電圧Ｖ1 inが小さくなり、この電圧Ｖ1 inの大きさに対
応した傾きを持つ直線となるような輝度特性が符号変換
回路に予め記憶されている。電圧Ｖ1 inが大きく、電圧
Ｖ2inが最大の時に、出力電圧Ｖ outが最大輝度電圧と
なるものである。When the brightness around the display is bright, the voltage V1 in obtained by the light amount detection circuit becomes large, and when it is dark,
The code conversion circuit stores in advance luminance characteristics such that the voltage V1 in becomes smaller and a straight line having a slope corresponding to the magnitude of the voltage V1 in is formed. When the voltage V1 in is large and the voltage V2 in is maximum, the output voltage V out becomes the maximum brightness voltage.
【０００８】つまり、周囲の明るさが暗い時（電圧Ｖ1
inが小さい時）は出力電圧Ｖ outの低い領域で分解能を
上げることができ、明るい時（電圧Ｖ1 inが大きい時）
は輝度を高くするために出力電圧Ｖ outを最大輝度電圧
に近づけることができるようになっている。That is, when the surrounding brightness is dark (voltage V1
When in is small), the resolution can be increased in the low output voltage V out region, and when it is bright (when voltage V 1 in is large)
In order to increase the brightness, the output voltage V out can be brought close to the maximum brightness voltage.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、上記従
来の輝度特性を有する表示器の輝度特性制御装置では、
ＣＲＴ等の表示器の表示画面のみに部分的に光が当たら
ないような場合、例えば、表示器が影となって、その他
の部分が明るい場合に、輝度調節器（ボリュ−ム）を使
って電圧Ｖ2 inを最大にしたとしても最大輝度電圧を得
ることができないため、表示器の表示画面を外部の明る
さに対抗させる程度にまで明るくすることができず、見
ずらいとの問題点があった。However, in the above-described conventional brightness characteristic control device for a display having a brightness characteristic,
If the display screen of a display such as a CRT is not partly illuminated by light, for example, if the display is a shadow and the rest is bright, use a brightness adjuster (volume). Even if the voltage V2 in is maximized, the maximum brightness voltage cannot be obtained, so that the display screen of the display cannot be brightened to the extent that it opposes the external brightness, which is difficult to see. It was
【００１０】本発明は上記実情に鑑みて為されたもので
あり、表示器の周辺が暗い時に輝度電圧が低い領域で分
解能を上げ、明るい時に輝度電圧が高い領域で分解能を
上げることができ、更にいずれの場合にも最高輝度電圧
を出力できる表示器の輝度特性制御装置を提供するもの
である。The present invention has been made in view of the above situation, and it is possible to increase the resolution in a region where the luminance voltage is low when the periphery of the display is dark and to increase the region where the luminance voltage is high when the display is bright. Further, in any case, the present invention provides a display brightness characteristic control device capable of outputting the maximum brightness voltage.
【００１１】[0011]
【課題を解決するための手段】上記従来例の問題点を解
決するための本発明は、表示器周辺の明るさに対応した
電圧を検出する光量検出回路と、前記表示器の輝度の調
節を行う輝度調節器と、前記光量検出回路から検出され
た電圧により予め記憶されている輝度特性を選択し、前
記輝度調節器からの入力を前記選択された輝度特性に従
って出力に変換する符号変換回路とを有する表示器の輝
度特性制御装置において、前記表示器周辺が暗い時に前
記入力の増加に対する前記出力の増加の割合を前記入力
の値が低い範囲で小さく、前記入力の値が高い範囲で大
きくし、明るい時に前記入力の増加に対する前記出力の
増加の割合を前記入力の値が低い範囲で大きく、前記入
力の値が高い範囲で小さくする入出力変換の輝度特性を
前記符号変換回路に持たせたことを特徴としている。DISCLOSURE OF THE INVENTION The present invention for solving the above-mentioned problems of the prior art includes a light amount detecting circuit for detecting a voltage corresponding to the brightness around the display and an adjustment of the brightness of the display. A brightness adjuster to perform, and a code conversion circuit that selects a brightness characteristic stored in advance by the voltage detected from the light amount detection circuit and converts an input from the brightness adjuster into an output according to the selected brightness characteristic. In the brightness characteristic control device for a display, the ratio of the increase in the output to the increase in the input is small in the low value range of the input and large in the high value range of the input when the display surroundings are dark. The code conversion circuit has a luminance characteristic of input / output conversion that makes the ratio of the increase in the output to the increase in the input large when the input value is low and is small when the input value is high when the input value is high. It is characterized in that which gave.
【００１２】[0012]
【作用】本発明によれば、表示器周辺が暗い時に輝度調
節器からの入力の増加に対する符号変換回路からの出力
の増加の割合を入力の値が低い範囲で小さく、入力の値
が高い範囲で大きくし、明るい時に入力の増加に対する
出力の増加の割合を入力の値が低い範囲で大きく、入力
の値が高い範囲で小さくする入出力変換の輝度特性を符
号変換回路に持たせた表示器の輝度特性制御装置として
いるので、暗い時に入力の値が低い範囲で分解能を上
げ、明るい時に入力の値が高い範囲で分解能を上げるこ
とができ、更に暗い時でも入力の値が高い範囲で大きい
出力を得ることができる。According to the present invention, the ratio of the increase in the output from the code conversion circuit to the increase in the input from the brightness adjuster is small in the low input value range and the high input value range in the dark display environment. A display with a code conversion circuit that has a luminance characteristic of input / output conversion that increases the ratio of output increase to input increase when the input value is low and decreases it when input value is high when the input value is high. Since it is a brightness characteristic control device, the resolution can be increased in the low input value range when it is dark, and the resolution can be increased in the high input value range when it is bright, and it is large in the high input value range even in the dark. You can get the output.
【００１３】[0013]
【実施例】本発明の一実施例について図面を参照しなが
ら説明する。図１は、本発明の一実施例に係る表示器の
輝度特性制御装置の構成ブロック図である。本実施例の
輝度特性制御装置は、光量検出回路（ＡＢＤ）１と、２
つのアナログ／デジタル（Ａ／Ｄ）変換回路２，３と、
符号変換回路（ＣＯＤＥＲ）４と、デジタル／アナログ
（Ｄ／Ａ）変換回路５と、増幅回路（ＡＭＰ）６と、輝
度調節器（ボリュ−ム）７とから構成されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration block diagram of a brightness characteristic control device for a display according to an embodiment of the present invention. The brightness characteristic control device according to the present embodiment includes light amount detection circuits (ABD) 1 and 2
Two analog / digital (A / D) conversion circuits 2 and 3,
It is composed of a code conversion circuit (CODER) 4, a digital / analog (D / A) conversion circuit 5, an amplification circuit (AMP) 6, and a brightness adjuster (volume) 7.
【００１４】本実施例の輝度特性制御装置の各構成部分
について具体的に説明する。光量検出回路（ＡＢＤ）１
は、表示器の表示画面の周囲の明るさを電気的に検出す
る回路であり、明るさに比例又は明るさに１対１に対応
した電圧（Ｖ1in）を出力する回路である。即ち、暗い
時は電圧Ｖ1 inが小さく、明るい時は電圧Ｖ1 inが大き
くなるような出力特性を持った回路である。Each component of the brightness characteristic control device of this embodiment will be specifically described. Light intensity detection circuit (ABD) 1
Is a circuit that electrically detects the brightness around the display screen of the display, and is a circuit that outputs a voltage (V1in) proportional to the brightness or corresponding to the brightness one-to-one. That is, the circuit has an output characteristic such that the voltage V1 in is small when it is dark and the voltage V1 in is large when it is bright.
【００１５】Ａ／Ｄ変換回路２は、符号変換回路（ＣＯ
ＤＥＲ）４で符号変換処理できるようにするために、ア
ナログ／デジタル（Ａ／Ｄ）変換を行い、電圧Ｖ1 inの
符号化を行う回路である。Ａ／Ｄ変換回路３は、輝度調
節器（ボリュ−ム）７からの電圧Ｖ2 inの符号化を行う
回路である。The A / D conversion circuit 2 is a code conversion circuit (CO
DER) 4 is a circuit that performs analog / digital (A / D) conversion and encodes the voltage V1 in so that code conversion processing can be performed. The A / D conversion circuit 3 is a circuit that encodes the voltage V2 in from the brightness adjuster (volume) 7.
【００１６】符号変換回路（ＣＯＤＥＲ）４は、本実施
例の特徴部分である輝度特性（入出力特性）を内部に保
持しており、Ａ／Ｄ変換回路２から出力された電圧Ｖ1
inの符号化デ−タに従ってその輝度特性を選択する回路
である。更に、この輝度特性によってＡ／Ｄ変換回路３
から出力された電圧Ｖ2 inの符号化デ−タを特定の符号
化デ−タ（出力デ−タ）に変換するものである。The code conversion circuit (CODER) 4 internally holds the brightness characteristic (input / output characteristic) which is a characteristic part of the present embodiment, and the voltage V1 output from the A / D conversion circuit 2 is held.
It is a circuit for selecting the luminance characteristic according to the encoded data of in. Further, due to this brightness characteristic, the A / D conversion circuit 3
The coded data of the voltage V2 in output from the converter is converted into specific coded data (output data).
【００１７】Ｄ／Ａ変換回路５は、ＣＯＤＥＲ４からの
出力デ−タをデジタル／アナログ変換し、特定の電圧を
出力する回路である。The D / A conversion circuit 5 is a circuit for converting the output data from the CODER 4 into digital / analog and outputting a specific voltage.
【００１８】増幅回路（ＡＭＰ）６は、Ｄ／Ａ変換回路
５からの電圧を所定の倍率に増幅し、出力電圧（Ｖ ou
t）を出力する回路である。The amplifier circuit (AMP) 6 amplifies the voltage from the D / A conversion circuit 5 to a predetermined magnification and outputs the output voltage (V ou
It is a circuit that outputs t).
【００１９】輝度調節器（ボリュ−ム）７は、可変抵抗
で構成され、つまみを調節することで電圧Ｖ2 inの大小
を任意に調節できるものである。The brightness adjuster (volume) 7 is composed of a variable resistor, and the size of the voltage V2 in can be arbitrarily adjusted by adjusting the knob.
【００２０】次に、本実施例のＣＯＤＥＲ４に記憶され
ている輝度特性（入出力特性）について、図２を使って
説明する。図２は、本実施例の表示器の輝度特性制御装
置における輝度特性（入出力特性）を表わす図である。Next, the brightness characteristics (input / output characteristics) stored in the CODER 4 of this embodiment will be described with reference to FIG. FIG. 2 is a diagram showing the luminance characteristic (input / output characteristic) in the luminance characteristic control device for a display according to this embodiment.
【００２１】図２に示す輝度特性は、光量検出回路１で
検出された電圧Ｖ1 inの値によって、ボリュ−ム７で特
定する電圧Ｖ2 inの値に対して出力電圧Ｖ outの値を変
化させるものである。つまり、輝度特性（入出力特性）
は、電圧Ｖ2 inを出力電圧Ｖ outに変換する変換特性と
もいえる。本実施例においては、周囲の明暗に対して
ａ，ｂの２つの変換特性を例に採って説明する。The brightness characteristic shown in FIG. 2 changes the value of the output voltage V out with respect to the value of the voltage V2 in specified by the volume 7 according to the value of the voltage V1 in detected by the light amount detection circuit 1. It is a thing. In other words, brightness characteristics (input / output characteristics)
Can be said to be a conversion characteristic for converting the voltage V2 in to the output voltage V out. In this embodiment, two conversion characteristics of a and b with respect to the surrounding light and dark will be described as an example.
【００２２】周囲が明るい時、つまり、光量検出回路１
で検出された電圧Ｖ1inの値が大きい時、ＣＯＤＥＲ４
で図２のａの変換特性を取る。ａの変換特性は、ボリュ
−ム７の電圧Ｖ2 inの値が小さい範囲で電圧Ｖ2 in−出
力電圧Ｖ outの直線の傾きが大きくなるように、電圧Ｖ
2 inの値が大きい範囲で電圧Ｖ2 in−出力電圧Ｖ outの
直線の傾きが小さくなるようにしている。従って、出力
電圧Ｖ outの高輝度域で分解能を上げ、低輝度域で分解
能が粗くなるようになっている。When the surroundings are bright, that is, the light amount detection circuit 1
When the value of voltage V1in detected by
Then, the conversion characteristic shown in FIG. The conversion characteristic of a is such that the slope of the straight line of the voltage V2 in-the output voltage V out becomes large in the range where the value of the voltage V2 in of the volume 7 is small.
The slope of the straight line of the voltage V2in-the output voltage Vout is made small in the range where the value of 2in is large. Therefore, the resolution is increased in the high luminance region of the output voltage V out, and the resolution becomes coarse in the low luminance region.
【００２３】周囲が暗い時、つまり、光量検出回路１で
検出された電圧Ｖ1 inの値が小さい時、ＣＯＤＥＲ４で
図２のｂの変換特性を取る。ｂの変換特性は、ボリュ−
ム７の電圧Ｖ2 inの値が小さい範囲で電圧Ｖ2 in−出力
電圧Ｖ outの直線の傾きが小さくなるように、電圧Ｖ2
inの値が大きい範囲で電圧Ｖ2 in−出力電圧Ｖ outの直
線の傾きが大きくなるようにしている。従って、低輝度
域で分解能を上げ、高輝度域で分解能が粗くなるように
なっている。When the surroundings are dark, that is, when the value of the voltage V1 in detected by the light amount detection circuit 1 is small, the conversion characteristic of b in FIG. The conversion characteristic of b is
In the range in which the value of the voltage V2 in of the column 7 is small, the voltage V2 in
The slope of the straight line of the voltage V2 in-the output voltage V out becomes large in the range where the value of in is large. Therefore, the resolution is increased in the low luminance range and becomes coarse in the high luminance range.
【００２４】そして、ａ，ｂの変換特性は、電圧Ｖ2 in
最大で共に同じ最大輝度電圧（最大の出力電圧Ｖ out）
を出力することができるようになっている。これによ
り、周囲が暗い時でも最大輝度電圧を出力することがで
き、周囲が明るい時と同様の輝度とするこができる。The conversion characteristics of a and b are the voltage V2 in
The same maximum brightness voltage (maximum output voltage V out)
Can be output. Thus, the maximum brightness voltage can be output even when the surroundings are dark, and the brightness can be the same as when the surroundings are bright.
【００２５】また、周囲の明るさが中程度の場合、つま
り、光量検出回路１で検出された電圧Ｖ1 inの値が中程
度の場合、周囲が明るくなるに従い図２のａの変換特性
に近づくようにし、周囲が暗くなるに従い図２のｂの変
換特性に近づくようにする。Further, when the surrounding brightness is medium, that is, when the value of the voltage V1 in detected by the light amount detecting circuit 1 is medium, the conversion characteristics of a in FIG. In this way, the conversion characteristic of b in FIG.
【００２６】次に、本実施例の輝度特性制御装置の動作
について説明する。光量検出回路１が周囲の明るさを検
知し、その明るさに比例する電圧Ｖ1 inを出力すると、
Ａ／Ｄ変換回路２が電圧Ｖ1 inを符号化デ−タに変換し
てＣＯＤＥＲ４に出力し、ＣＯＤＥＲ４がその内部に記
憶する図２に示すような変換特性（輝度特性）の中から
符号化デ−タに対応した変換特性を選択する。Next, the operation of the brightness characteristic control device of this embodiment will be described. When the light amount detection circuit 1 detects the ambient brightness and outputs a voltage V1 in proportional to the brightness,
The A / D conversion circuit 2 converts the voltage V1 in into coded data and outputs the coded data to the CODER 4, and the coder 4 stores the coded data among the conversion characteristics (luminance characteristics) as shown in FIG. -Select the conversion characteristic corresponding to the data.
【００２７】一方、ボリュ−ム７で輝度調整のためにつ
まみを調節すると、つまみの動作に対応した電圧Ｖ2 in
が出力され、Ａ／Ｄ変換回路３は、ボリュ−ム７からの
電圧Ｖ2 inを符号化デ−タに変換してＣＯＤＥＲ４に出
力し、ＣＯＤＥＲ４は選択された変換特性（輝度特性）
に従って特定の符号化デ−タ（出力デ−タ）をＤ／Ａ変
換回路５へ出力する。Ｄ／Ａ変換回路５は、ＣＯＤＥＲ
４からの出力デ−タをアナログに変換してＡＭＰ６へ出
力し、ＡＭＰ６はアナログに変換された出力デ−タを所
定の倍率に増幅し、出力電圧Ｖ outを出力して、この出
力電圧Ｖ outで表示器が制御されて特定の輝度に設定さ
れる。On the other hand, when the knob is adjusted by the volume 7 for brightness adjustment, the voltage V2 in corresponding to the operation of the knob is set.
Is output, and the A / D conversion circuit 3 converts the voltage V2 in from the volume 7 into encoded data and outputs it to the CODER 4, which in turn selects the selected conversion characteristic (luminance characteristic).
In accordance with the above, specific coding data (output data) is output to the D / A conversion circuit 5. The D / A conversion circuit 5 has a CODER
The output data from 4 is converted to analog and output to the AMP 6, and the AMP 6 amplifies the output data converted to analog to a predetermined magnification and outputs the output voltage V out to output this output voltage V out. The display is controlled by out and set to a specific brightness.
【００２８】本実施例の表示器の輝度特性制御装置によ
れば、表示器の周辺が明るい時（電圧Ｖ1 inが大きい
時）には、ボリウムの電圧Ｖ2 inの値が大きい範囲で、
変換特性を表わす電圧Ｖ2 in−出力電圧Ｖ outの直線の
傾きが小さくなるようにし、また、暗い時（電圧Ｖ1 in
が小さい時）には、電圧Ｖ2 inの値が小さい範囲で、電
圧Ｖ2 in−出力電圧Ｖ outの直線の傾きが小さくなるよ
うにしているので、表示器の周辺が明るい時には、輝度
電圧の高い領域で分解能を向上させることができ、暗い
時には輝度電圧が低い領域で分解能を向上させることが
できるため、輝度調整の操作が容易になる効果がある。According to the brightness characteristic control device for a display of this embodiment, when the periphery of the display is bright (when the voltage V1 in is large), the voltage V2 in of the volume is in a large range,
The slope of the straight line of the voltage V2 in representing the conversion characteristic-the output voltage V out is made small, and when it is dark (the voltage V1 in
Is small), the slope of the straight line of the voltage V2 in-the output voltage V out is set to be small in the range where the value of the voltage V2 in is small. Therefore, when the periphery of the display is bright, the brightness voltage is high. The resolution can be improved in a region, and the resolution can be improved in a region where the luminance voltage is low when it is dark, so that there is an effect that the operation of the luminance adjustment becomes easy.
【００２９】また、表示器の周辺が明るい時に、電圧Ｖ
2 inの値が小さい範囲で、変換特性を表わす電圧Ｖ2 in
−出力電圧Ｖ outの直線の傾きが大きくなるようにし、
また、暗い時に、電圧Ｖ2 inの値が大きい範囲で、電圧
Ｖ2 in−出力電圧Ｖ outの直線の傾きが大きくなるよう
にしているので、表示器の周辺が暗い時でも明るい時で
も同じ最高輝度電圧を出力することができ、表示器の周
囲が暗く、視野に直接的に入る外光が有る場合において
最高輝度電圧を出力することができるため、表示器が見
易くなるという効果がある。When the area around the display is bright, the voltage V
In the range where the value of 2 in is small, the voltage V2 in representing the conversion characteristic
-The slope of the straight line of the output voltage V out is increased,
In addition, when the voltage V2 in is large, the slope of the straight line of the voltage V2 in-the output voltage V out is made large in a range where the value of the voltage V2 in is large. Since the voltage can be output, the maximum brightness voltage can be output when the surroundings of the display are dark, and there is external light that directly enters the field of view, the display is easy to see.
【００３０】[0030]
【発明の効果】本発明によれば、表示器周辺が暗い時に
輝度調節器からの入力の増加に対する符号変換回路から
の出力の増加の割合を入力の値が低い範囲で小さく、入
力の値が高い範囲で大きくし、明るい時に入力の増加に
対する出力の増加の割合を入力の値が低い範囲で大き
く、入力の値が高い範囲で小さくする入出力変換の輝度
特性を符号変換回路に持たせた表示器の輝度特性制御装
置としているので、暗い時に入力の値が低い範囲で分解
能を上げ、明るい時に入力の値が高い範囲で分解能を上
げることができ、更に暗い時でも入力の値が高い範囲で
大きい出力を得ることができるため、表示器の表示画面
が見やすくなるという効果がある。According to the present invention, the ratio of the increase in the output from the code conversion circuit to the increase in the input from the brightness adjuster is small in the low input value range and the input value is small when the surroundings of the display are dark. The code conversion circuit has a brightness characteristic of input / output conversion that increases in the high range and increases the ratio of the output increase to the input increase in the low input range when the brightness is high and decreases it in the high input range. Since it is a brightness characteristic control device for the display, the resolution can be increased in the low input value range when it is dark, and can be increased in the high input value range when it is bright, and in the high input value range even when it is dark. Since a large output can be obtained with, there is an effect that the display screen of the display is easy to see.
【図１】本発明の一実施例に係る表示器の輝度特性制御
装置の構成ブロック図である。FIG. 1 is a configuration block diagram of a brightness characteristic control device for a display according to an embodiment of the present invention.
【図２】本実施例の表示器の輝度特性制御装置における
輝度特性を表わす図である。FIG. 2 is a diagram showing a luminance characteristic in the luminance characteristic control device for a display according to the present embodiment.
【図３】従来の表示器の輝度特性制御装置における輝度
特性を表わす図である。FIG. 3 is a diagram showing a luminance characteristic in a conventional luminance characteristic control device for a display.
１…光量検出回路、 ２…Ａ／Ｄ変換回路、 ３…Ａ／
Ｄ変換回路、 ４…符号変換回路、 ５…Ｄ／Ａ変換回
路、 ６…増幅回路、 ７…輝度調節器1 ... Light amount detection circuit, 2 ... A / D conversion circuit, 3 ... A /
D conversion circuit, 4 ... Code conversion circuit, 5 ... D / A conversion circuit, 6 ... Amplification circuit, 7 ... Luminance adjuster
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０５Ｂ 37/02 Ｄ 6858−3Ｋ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display location H05B 37/02 D 6858-3K
Claims (1)
出する光量検出回路と、前記表示器の輝度の調節を行う
輝度調節器と、前記光量検出回路から検出された電圧に
より予め記憶されている輝度特性を選択し、前記輝度調
節器からの入力を前記選択された輝度特性に従って出力
に変換する符号変換回路とを有する表示器の輝度特性制
御装置において、前記表示器周辺が暗い時に前記入力の
増加に対する前記出力の増加の割合を前記入力の値が低
い範囲で小さく、前記入力の値が高い範囲で大きくし、
明るい時に前記入力の増加に対する前記出力の増加の割
合を前記入力の値が低い範囲で大きく、前記入力の値が
高い範囲で小さくする入出力変換の輝度特性を前記符号
変換回路に持たせたことを特徴とする表示器の輝度特性
制御装置。1. A light amount detection circuit for detecting a voltage corresponding to the brightness around the display, a brightness adjuster for adjusting the brightness of the display, and a voltage detected by the light amount detection circuit. And a code conversion circuit for converting an input from the brightness adjuster into an output according to the selected brightness property, the brightness property control device for a display, wherein the brightness around the display is dark. The ratio of the increase of the output to the increase of the input is small in the range where the value of the input is low, and is large in the range where the value of the input is high,
The code conversion circuit is provided with a luminance characteristic of input / output conversion for increasing the ratio of the increase of the output to the increase of the input in a low value range of the input and reducing the ratio in a high value range of the input when the input value is high. And a brightness characteristic control device for a display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3284098A JP2548470B2 (en) | 1991-10-04 | 1991-10-04 | Brightness control device for display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3284098A JP2548470B2 (en) | 1991-10-04 | 1991-10-04 | Brightness control device for display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05100652A true JPH05100652A (en) | 1993-04-23 |
| JP2548470B2 JP2548470B2 (en) | 1996-10-30 |
Family
ID=17674184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3284098A Expired - Lifetime JP2548470B2 (en) | 1991-10-04 | 1991-10-04 | Brightness control device for display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2548470B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0992972A2 (en) * | 1998-10-01 | 2000-04-12 | LOEWE OPTA GmbH | Method of adjusting the light intensity of a cell of a flat panel display |
| EP1178672A2 (en) * | 2000-07-31 | 2002-02-06 | Seiko Epson Corporation | Environment-compliant image display and information storage medium |
| US6894697B2 (en) | 2000-07-31 | 2005-05-17 | Seiko Epson Corporation | Environment-compliant image display system and program |
| US7595811B2 (en) | 2001-07-26 | 2009-09-29 | Seiko Epson Corporation | Environment-complaint image display system, projector, and program |
| CN106898331A (en) * | 2017-04-06 | 2017-06-27 | 北京奇虎科技有限公司 | A kind of screen display adjusting method and device |
-
1991
- 1991-10-04 JP JP3284098A patent/JP2548470B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0992972A2 (en) * | 1998-10-01 | 2000-04-12 | LOEWE OPTA GmbH | Method of adjusting the light intensity of a cell of a flat panel display |
| EP0992972A3 (en) * | 1998-10-01 | 2000-10-25 | LOEWE OPTA GmbH | Method of adjusting the light intensity of a cell of a flat panel display |
| EP1178672A2 (en) * | 2000-07-31 | 2002-02-06 | Seiko Epson Corporation | Environment-compliant image display and information storage medium |
| EP1178672A3 (en) * | 2000-07-31 | 2003-04-16 | Seiko Epson Corporation | Environment-compliant image display and information storage medium |
| US6847374B2 (en) | 2000-07-31 | 2005-01-25 | Seiko Epson Corporation | Environment-compliant image display system and program |
| US6894697B2 (en) | 2000-07-31 | 2005-05-17 | Seiko Epson Corporation | Environment-compliant image display system and program |
| US7595811B2 (en) | 2001-07-26 | 2009-09-29 | Seiko Epson Corporation | Environment-complaint image display system, projector, and program |
| US7986332B2 (en) | 2001-07-26 | 2011-07-26 | Seiko Epson Corporation | Environment-compliant image display system, projector, and program |
| CN106898331A (en) * | 2017-04-06 | 2017-06-27 | 北京奇虎科技有限公司 | A kind of screen display adjusting method and device |
| CN106898331B (en) * | 2017-04-06 | 2019-12-24 | 北京安云世纪科技有限公司 | Screen display adjusting method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2548470B2 (en) | 1996-10-30 |
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