JP2011242570A5 - - Google Patents

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Publication number
JP2011242570A5
JP2011242570A5 JP2010113989A JP2010113989A JP2011242570A5 JP 2011242570 A5 JP2011242570 A5 JP 2011242570A5 JP 2010113989 A JP2010113989 A JP 2010113989A JP 2010113989 A JP2010113989 A JP 2010113989A JP 2011242570 A5 JP2011242570 A5 JP 2011242570A5
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Japan
Prior art keywords
led
unit
switch
display device
time interval
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JP2010113989A
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Japanese (ja)
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JP2011242570A (en
JP5554145B2 (en
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Publication of JP2011242570A5 publication Critical patent/JP2011242570A5/ja
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Claims (3)

多数のＬＥＤがマトリックス状に実装されたＬＥＤ表示ユニットを複数個配置してＬＥＤスクリーンを形成するＬＥＤ映像表示装置であって、
複数の前記ＬＥＤ表示ユニットに実装された各ＬＥＤに電源を供給する定電圧電源部と、複数個の前記ＬＥＤ表示ユニットにＰＷＭ指令を出し、前記各ＬＥＤに流れる電流値を調整して前記各ＬＥＤの発光制御を行うスクリーンコントローラを備え、
前記ＬＥＤ表示ユニットの駆動回路は、前記各ＬＥＤにそれぞれ直列に接続されたスイッチで構成されたスイッチ回路と前記ＰＷＭ指令によって前記各ＬＥＤをＯＮ／ＯＦＦ制御するスイッチ制御部で構成され、
前記スイッチ制御部は、前記スクリーンコントローラからのＰＷＭ指令に基づいて前記各ＬＥＤを点灯させるパルスの時間幅を変更して、前記定電圧電源部から前記ＬＥＤ表示ユニットに流れる電流値のピーク時間間隔を調整することを特徴とするＬＥＤ映像表示装置。 An LED video display device in which a plurality of LED display units each having a plurality of LEDs mounted in a matrix are arranged to form an LED screen,
A constant voltage power supply unit that supplies power to each LED mounted on the plurality of LED display units, and a PWM command is issued to the plurality of LED display units, and the current value flowing through each LED is adjusted to adjust each LED Equipped with a screen controller that controls the light emission of
The driving circuit of the LED display unit, the consists of answering switch control unit to ON / OFF control of each LED by the PWM command and the switch circuit constituted by a switch connected in series to each LED,
The switch control unit changes a time width of a pulse for lighting each LED based on a PWM command from the screen controller, and sets a peak time interval of a current value flowing from the constant voltage power source unit to the LED display unit. An LED image display device characterized by adjusting. 前記ＬＥＤ表示ユニットに流れる電流値を検出する電流検出部を備え、前記電流検出部は、前記ＬＥＤ表示ユニットに流れる電流のピーク時間間隔があらかじめ設定された周波数に該当し、かつ設定されたピーク電流値を上回った場合に、前記スイッチ制御部によって各スイッチのＯＮ／ＯＦＦの時間間隔を変更することを特徴とする請求項１に記載のＬＥＤ映像表示装置。 A current detection unit that detects a current value flowing through the LED display unit, wherein the current detection unit corresponds to a preset frequency at which a peak time interval of the current flowing through the LED display unit is set; The LED image display device according to claim 1, wherein when the value exceeds the value, the switch control unit changes an ON / OFF time interval of each switch. 前記定電圧電源部は、発生する異音を検出する異音検出装置を内部に備え、前記異音検出装置が異音を検出すると、前記スイッチ制御部によって各スイッチのＯＮ／ＯＦＦの時間間隔を変更することを特徴とする請求項１に記載のＬＥＤ映像表示装置。 The constant voltage power supply unit includes an abnormal sound detection device that detects an abnormal sound to be generated, and when the abnormal sound detection device detects an abnormal sound, the switch control unit sets an ON / OFF time interval of each switch. The LED image display device according to claim 1, wherein the LED image display device is changed.
JP2010113989A 2010-05-18 2010-05-18 LED video display device Active JP5554145B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010113989A JP5554145B2 (en) 2010-05-18 2010-05-18 LED video display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2010113989A JP5554145B2 (en) 2010-05-18 2010-05-18 LED video display device

Publications (3)

Publication Number Publication Date
JP2011242570A JP2011242570A (en) 2011-12-01
JP2011242570A5 true JP2011242570A5 (en) 2013-07-25
JP5554145B2 JP5554145B2 (en) 2014-07-23

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JP2010113989A Active JP5554145B2 (en) 2010-05-18 2010-05-18 LED video display device

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6009170B2 (en) * 2012-02-07 2016-10-19 三菱電機株式会社 Video display device
JP6115751B2 (en) 2012-11-07 2017-04-19 Ｎｌｔテクノロジー株式会社 Light emitting element driving circuit and display device
CN103745689B (en) * 2014-01-07 2016-08-31 深圳市明微电子股份有限公司 A kind of driving chip of dynamic screen
KR102552287B1 (en) * 2016-09-06 2023-07-06 삼성전자주식회사 LED display device, and method for operating the same
EP4426069A1 (en) * 2023-03-01 2024-09-04 Tridonic GmbH & Co. KG Dimming method with noise control
JP2024143189A (en) * 2023-03-30 2024-10-11 ソニーグループ株式会社 Drive control device, program, and display system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09244570A (en) * 1996-03-07 1997-09-19 Matsushita Electric Ind Co Ltd Light emitting diode(led) display driving device
JP3006592B1 (en) * 1998-07-24 2000-02-07 日亜化学工業株式会社 LED display unit
JP2001166278A (en) * 1999-12-06 2001-06-22 Matsushita Electric Ind Co Ltd Back-light control device for liquid crystal display device
JP4525287B2 (en) * 2004-10-14 2010-08-18 ソニー株式会社 Light emitting element driving device and display device
JP5058924B2 (en) * 2008-09-12 2012-10-24 シャープ株式会社 Backlight unit, liquid crystal display device, and inverter dimming frequency control method

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