JPH04128875A - Led display device - Google Patents
Led display deviceInfo
- Publication number
- JPH04128875A JPH04128875A JP25239890A JP25239890A JPH04128875A JP H04128875 A JPH04128875 A JP H04128875A JP 25239890 A JP25239890 A JP 25239890A JP 25239890 A JP25239890 A JP 25239890A JP H04128875 A JPH04128875 A JP H04128875A
- Authority
- JP
- Japan
- Prior art keywords
- led
- monitor
- emitted light
- trimmer
- drive circuit
- 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
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、映像、文字を表示して宣伝またはお知らせな
どに利用するＬＥＤ表示装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an LED display device that displays images and characters and is used for advertisements, announcements, and the like.
従来の技術
近年、広告塔などに用いれる映像、文字はＬＥＤを使用
したものが主流となっている。BACKGROUND OF THE INVENTION In recent years, LEDs have become the mainstream for images and text used on billboards and the like.
従来、この種のＬＥＤ表示装置は第２図に示すような構
成が一般的であった。Conventionally, this type of LED display device generally had a configuration as shown in FIG.
以下、その構成について図面を参照しながら説明する。The configuration will be described below with reference to the drawings.
図に示すように、映像および文字のパターンを出力する
表示データ発生部１と、この信号を受信する描画データ
受信部２と、この描画データ受信部２によって制御され
るＬＥＤ駆動回路３と、映像および文字等を表示するＬ
ＥＤアレイ４によって構成されている。ＬＥＤアレイ４
は多数のＬＥＤ５からなシ、また全体の表示画面は多数
のモジュール６によって構成している。As shown in the figure, a display data generating section 1 that outputs images and character patterns, a drawing data receiving section 2 that receives this signal, an LED driving circuit 3 that is controlled by this drawing data receiving section 2, and L to display characters, etc.
It is composed of an ED array 4. LED array 4
is made up of a large number of LEDs 5, and the entire display screen is made up of a large number of modules 6.
上記構成において表示データ発生部１がノぐターン出力
を描画データ受信部２に送信しＬＥＤ駆動回路３の出力
によってＬＥＤアレイ４を発光するようになっている。In the above configuration, the display data generating section 1 transmits a turn output to the drawing data receiving section 2, and the output of the LED driving circuit 3 causes the LED array 4 to emit light.
このように、上記従来のＬＥＤ表示装置でもス
ＬＥＤ駆動回路３は通常電流駆動型になっておシ、ＬＥ
Ｄｓの点灯時の電流が一定になるように制御して発光強
度のむらを無くしている。In this way, even the conventional LED display device described above can
The LED drive circuit 3 is a normal current drive type.
The current when the Ds is turned on is controlled to be constant, thereby eliminating unevenness in the light emission intensity.
発明が解決しようとする課題
このような従来のＬＥＤ表示装置では、モジュール６内
ではＬＥＤ５の特性は揃っているがそれぞれのモジュー
ル６間ではばらつき大きいので同一電流を流しても、各
モジュール６間で発光強度のむらが発生し表示の品質を
低下するという問題があった。本発明は上記問題を解決
するもので、モジュール間でＬＥＤのばらつきが発生し
ても表示むらをなくすることができるＬＥＤ表示装置を
提供することを目的としている。Problems to be Solved by the Invention In such a conventional LED display device, the characteristics of the LEDs 5 within the module 6 are the same, but there are large variations between the modules 6, so even if the same current is applied, the characteristics of the LEDs 5 are uniform between the modules 6. There was a problem in that the luminous intensity became uneven and the display quality deteriorated. The present invention solves the above-mentioned problems, and aims to provide an LED display device that can eliminate display unevenness even if variations in LEDs occur between modules.
課題を解決するだめの手段
本発明は上記目的を達成するために、ＬＥＤ表示装置は
、表示データ発生部の信号を受信する描画データ受信部
と、この描画データ受信部によって制御されるＬＥＤ駆
動回路と、このＬＥＤ駆動回路の出力によって発光する
ＬＥＤアレーを備え、モニター用ＬＥＤと、このモニタ
ー用ＬＥＤを制御するモニター用ＬＥＤ駆動回路と、前
記モニター用ＬＥＤの発光量を検知する受光素子と、前
記モニター用ＬＥＤの初期発光量を設定するためのトリ
マーを設け、前記受光素子の出力が前記トリマーで設定
された値になるように、前記ＬＥＤ駆動回路および前記
発光量モニター用ＬＥＤ駆動回路の駆動電源を制御する
ようにしたものである。Means for Solving the Problems In order to achieve the above object, the present invention provides an LED display device that includes a drawing data receiving section that receives a signal from a display data generating section, and an LED driving circuit that is controlled by the drawing data receiving section. and an LED array that emits light based on the output of the LED drive circuit, a monitor LED, a monitor LED drive circuit that controls the monitor LED, a light receiving element that detects the amount of light emitted by the monitor LED, and the monitor LED that controls the monitor LED. A trimmer is provided for setting the initial light emission amount of the monitoring LED, and a drive power source for the LED drive circuit and the light emission amount monitoring LED drive circuit is provided so that the output of the light receiving element becomes the value set by the trimmer. It is designed to control.
作 用
上記した構成において、受光素子がモニター用ＬＥＤの
発光量を検知し、この出力がトリマーで設定された値に
なるようにＬＥＤ駆動回路の駆動電源を自動的に制御し
ているのでＬＥＤアレーの発光量を一定にすることとな
る。Function In the above configuration, the light receiving element detects the amount of light emitted from the monitor LED and automatically controls the drive power of the LED drive circuit so that this output becomes the value set by the trimmer. This results in a constant amount of light emission.
実施例
以下、本発明の一実施例について第１図を参照しながら
説明する。なお、本実施例において、前述の従来例に示
したものと同一構成部品には同じ符号を付し、その説明
は省略する。本実施例の特徴的構成は従来例で説明した
ＬＥＤ駆動回路部の駆動電源を制御するようにしたこと
にある。すなわち、１ｏはモニター用ＬＥＤであシ、こ
れを開側するモニター用ＬＥＤ駆動回路１１と、フォト
トランジスターなど発光量を検知する受光素子１２と、
モニター用ＬＥＤ１０の初期発光強度を微調整するため
のトリマー１３によってモジュール１４を構成している
。EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG. In this embodiment, the same components as those shown in the above-mentioned conventional example are given the same reference numerals, and the explanation thereof will be omitted. The characteristic configuration of this embodiment is that the driving power source of the LED driving circuit section described in the conventional example is controlled. That is, 1o is a monitor LED, a monitor LED drive circuit 11 that opens this, a light receiving element 12 such as a phototransistor that detects the amount of light emitted,
A module 14 includes a trimmer 13 for finely adjusting the initial light emission intensity of the monitor LED 10.
上記構成において動作を説明すると、受光素子１２がモ
ニター用ＬＥＤＩＯの発光量を検知すると、この出力が
トリマー１３で設定された値になるようにモニター用Ｌ
ＥＤ駆動回路１１およびＬＥＤ駆動回路３の駆動電源を
制御してＬＥＤアレーの発光量を一定する。To explain the operation in the above configuration, when the light receiving element 12 detects the amount of light emitted from the monitor LEDIO, the monitor LED
The drive power supplies of the ED drive circuit 11 and the LED drive circuit 3 are controlled to keep the amount of light emitted from the LED array constant.
発明の効果
以上の実施例の説明から明らかなように、本発明によれ
ば表示データ発生部の信号を受信する描画データ受信部
と、この描画データ受信部によって制御されるＬＥＤ駆
動回路と、とのＬＥＤ駆動回路の出力によって発光する
ＬＥＤアレーを備え、モニター用ＬＥＤと、このモニタ
ー用ＬＥＤを制御するモニター用ＬＥＤ駆動回路と、モ
ニター用ＬＥＤの発光量を検知する受光素子と、モニタ
ー用ＬＥＤの初期発光量を設定するためのトリマーを設
け、受光素子の出力が前記トリマーで設定された値にな
るように、ＬＥＤ駆動回路および発光量モニター用ＬＥ
Ｄ駆動回路の駆動電源を制御することによりＬＥＤアレ
ーの発光量を一定することができ、モジュール間でＬＥ
Ｄのばらつきが発生しても表示むらをなくすることがで
きる。Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, there is provided a drawing data receiving section that receives a signal from a display data generating section, and an LED driving circuit that is controlled by this drawing data receiving section. It is equipped with an LED array that emits light according to the output of the LED drive circuit, and includes a monitor LED, a monitor LED drive circuit that controls the monitor LED, a light receiving element that detects the amount of light emitted by the monitor LED, and a monitor LED that controls the monitor LED. A trimmer is provided to set the initial light emission amount, and an LED drive circuit and an LED for monitoring the light emission amount are installed so that the output of the light receiving element becomes the value set by the trimmer.
By controlling the drive power supply of the D drive circuit, the amount of light emitted from the LED array can be kept constant, and the LED
Even if variations in D occur, display unevenness can be eliminated.
第１図は本発明の一実施例のＬＥＤ表示装置のブロック
図、第２図は従来例のＬＥＤ表示装置のブロック図であ
る。
１・・・・・・表示データ発生部、２・・・・・・描画
データ受信部、３・・・・・・ＬＥＤ駆動回路、４・・
・・・・ＬＥＤアレ１０・・・・・・モニター用ＬＥＤ
、１１・・・・・・モニター用ＬＥＤ駆動回路、１２・
・・・・・受光素子、１３・・・・・トリマーFIG. 1 is a block diagram of an LED display device according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional LED display device. 1...Display data generation section, 2...Drawing data reception section, 3...LED drive circuit, 4...
...LED array 10...LED for monitor
, 11... Monitor LED drive circuit, 12.
..... Light receiving element, 13 ..... Trimmer
Claims (1)
信する描画データ受信部と、この描画データ受信部によ
って制御されるＬＥＤ駆動回路と、このＬＥＤ駆動回路
の出力によって発光するＬＥＤアレーを備え、モニター
用ＬＥＤと、このモニター用ＬＥＤを制御するモニター
用ＬＥＤ駆動回路と、前記モニター用ＬＥＤの発光量を
検知する受光素子と、前記モニター用ＬＥＤの初期発光
量を設定するためのトリマーを設け、前記受光素子の出
力が前記トリマーで設定された値になるように、前記Ｌ
ＥＤ駆動回路および前記発光量モニター用ＬＥＤ駆動回
路の駆動電源を制御するようにしてなるＬＥＤ表示装置
。A display data generating section, a drawing data receiving section that receives a signal from the display data generating section, an LED driving circuit controlled by the drawing data receiving section, and an LED array that emits light by the output of the LED driving circuit, A monitor LED, a monitor LED drive circuit that controls the monitor LED, a light receiving element that detects the amount of light emitted by the monitor LED, and a trimmer that sets the initial amount of light emitted by the monitor LED, the L so that the output of the light receiving element becomes the value set by the trimmer.
An LED display device configured to control drive power supplies of an ED drive circuit and the LED drive circuit for monitoring the amount of light emitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25239890A JPH04128875A (en) | 1990-09-20 | 1990-09-20 | Led display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25239890A JPH04128875A (en) | 1990-09-20 | 1990-09-20 | Led display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04128875A true JPH04128875A (en) | 1992-04-30 |
Family
ID=17236781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25239890A Pending JPH04128875A (en) | 1990-09-20 | 1990-09-20 | Led display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04128875A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006016706A1 (en) * | 2004-08-13 | 2006-02-16 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device and driving method thereof |
| JP2006079077A (en) * | 2004-08-13 | 2006-03-23 | Semiconductor Energy Lab Co Ltd | Light emitting device and driving method thereof |
| WO2008064590A1 (en) * | 2006-11-29 | 2008-06-05 | Hong Kong Applied Science and Technology Research Institute Co. Ltd | Image display apparatus |
| US7442950B2 (en) | 2004-12-06 | 2008-10-28 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device |
| US7973670B2 (en) | 2005-12-28 | 2011-07-05 | Semiconductor Energy Laboratory Co., Ltd. | Display device and method for inspecting the same |
| US8044949B2 (en) | 2005-05-02 | 2011-10-25 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device and electronic apparatus for displaying images |
| JP2013238793A (en) * | 2012-05-17 | 2013-11-28 | Mitsubishi Electric Corp | Video display device |
| CN105761667A (en) * | 2016-03-02 | 2016-07-13 | 大连集思特科技有限公司 | LED intelligent glass video control method |
| WO2021192221A1 (en) * | 2020-03-27 | 2021-09-30 | 三菱電機株式会社 | Led display device and led display method |
| WO2022074784A1 (en) * | 2020-10-08 | 2022-04-14 | 三菱電機株式会社 | Led display system |
-
1990
- 1990-09-20 JP JP25239890A patent/JPH04128875A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006016706A1 (en) * | 2004-08-13 | 2006-02-16 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device and driving method thereof |
| JP2006079077A (en) * | 2004-08-13 | 2006-03-23 | Semiconductor Energy Lab Co Ltd | Light emitting device and driving method thereof |
| US8354794B2 (en) | 2004-08-13 | 2013-01-15 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device and driving method thereof |
| US7923937B2 (en) | 2004-08-13 | 2011-04-12 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device and driving method thereof |
| US7442950B2 (en) | 2004-12-06 | 2008-10-28 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device |
| US8044949B2 (en) | 2005-05-02 | 2011-10-25 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device and electronic apparatus for displaying images |
| US7973670B2 (en) | 2005-12-28 | 2011-07-05 | Semiconductor Energy Laboratory Co., Ltd. | Display device and method for inspecting the same |
| WO2008064590A1 (en) * | 2006-11-29 | 2008-06-05 | Hong Kong Applied Science and Technology Research Institute Co. Ltd | Image display apparatus |
| JP2013238793A (en) * | 2012-05-17 | 2013-11-28 | Mitsubishi Electric Corp | Video display device |
| CN105761667A (en) * | 2016-03-02 | 2016-07-13 | 大连集思特科技有限公司 | LED intelligent glass video control method |
| CN105761667B (en) * | 2016-03-02 | 2018-05-08 | 大连集思特科技有限公司 | LED intelligent glass video control methods |
| WO2021192221A1 (en) * | 2020-03-27 | 2021-09-30 | 三菱電機株式会社 | Led display device and led display method |
| WO2022074784A1 (en) * | 2020-10-08 | 2022-04-14 | 三菱電機株式会社 | Led display system |
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