CN105913795A - 一种新型恒流源 - Google Patents

一种新型恒流源 Download PDF

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Publication number
CN105913795A
CN105913795A CN201610392366.7A CN201610392366A CN105913795A CN 105913795 A CN105913795 A CN 105913795A CN 201610392366 A CN201610392366 A CN 201610392366A CN 105913795 A CN105913795 A CN 105913795A
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China
Prior art keywords
resistance
chip
compensation
novel constant
current source
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CN201610392366.7A
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English (en)
Inventor
姜小虎
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Suzhou Kinsoon Electronic Technology Co Ltd
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Suzhou Kinsoon Electronic Technology Co Ltd
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Priority to CN201610392366.7A priority Critical patent/CN105913795A/zh
Publication of CN105913795A publication Critical patent/CN105913795A/zh
Pending legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]

Abstract

本发明公开了一种新型恒流源，包括芯片以及设置于芯片周围的外围电路，所述外围电路上设有若干串联的标定电阻，所述标定电阻与芯片之间设有若干串联的补偿电阻，补偿电阻的两端可短接以使电流全部通过补偿电阻，通过设置补偿电阻，输出电流范围可调，使LED显示屏保持与起初同等的亮度，提高产品的使用寿命。

Description

一种新型恒流源
技术领域
本发明涉及一种新型恒流源，适用于LED显示屏。
背景技术
在大城市，户外传统媒体正在逐步被户外视频，户外LED等新形态所取代。数据显示，户外广告的增长主要是来自户外视频，户外LED，户外LCD，户外电子阅报栏，户外触摸查询机。公交移动电视2007年较2006年增长超过200％，户外LED增速也很惊人，达到148％。在美国户外广告市场中，户外视频、LED占据了绝大份额。
户外显示屏以及室内显示多媒体屏使用过一段时间后，由于光衰，屏幕的亮度比起初时低，导致看不清屏幕。
发明内容
本发明要解决的技术问题是克服现有的缺陷，提供一种应用于户外显示屏或室内多媒体，能减少光衰，保持显示屏稳定的亮度的新型恒流源。
为了解决上述技术问题，本发明提供了如下的技术方案：
一种新型恒流源，包括芯片以及设置于芯片周围的外围电路，所述外围电路上设有若干串联的标定电阻，所述标定电阻与芯片之间设有若干串联的补偿电阻，补偿电阻的两端可短接以使电流全部通过补偿电阻。
进一步的，所述每一个补偿电阻的电阻值相等或者不相等。
进一步的，所述标定电阻和补偿电阻均为热敏电阻。
本发明的有益效果是：
适用于5寸至24寸LED显示屏，本产品采用先进的设计理念，通过设置补偿电阻，当显示多媒体使用过一段时间后，LED显示屏变暗，此时将其中一个或若干个补偿电阻短接，使整个电路总电阻减小，电流增大，则LED显示屏变亮。灵活方便的电流调整设计，输出电流范围可调60mA-580mA，使LED显示屏保持与起初同等的亮度，提高产品的使用寿命。
附图说明
附图用来提供对本发明的进一步理解，并且构成说明书的一部分，与本发明的实施例一起用于解释本发明，并不构成对本发明的限制。在附图中：
图1是本发明实施例公开的新型恒流源的电路图。
具体实施方式
以下结合附图对本发明的优选实施例进行说明，应当理解，此处所描述的优选实施例仅用于说明和解释本发明，并不用于限定本发明。
根据图1，一种新型恒流源，包括芯片3以及设置于芯片3周围的外围电路，所述外围电路上设有若干串联的标定电阻1，所述标定电阻1与芯片3之间设有若干串联的补偿电阻2，补偿电阻2的两端可短接以使电流全部通过补偿电阻2。
进一步的，所述每一个补偿电阻的电阻值相等或者不相等。
进一步的，所述标定电阻和补偿电阻均为热敏电阻。
最后应说明的是：以上仅为本发明的优选实施例而已，并不用于限制本发明，尽管参照前述实施例对本发明进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (3)

1.一种新型恒流源，其特征在于，包括芯片以及设置于芯片周围的外围电路，所述外围电路上设有若干串联的标定电阻，所述标定电阻与芯片之间设有若干串联的补偿电阻，补偿电阻的两端可短接以使电流全部通过补偿电阻。
2.根据权利要求1所述的新型恒流源，其特征在于，所述每一个补偿电阻的电阻值相等或者不相等。
3.根据权利要求1所述的新型恒流源，其特征在于，所述标定电阻和补偿电阻均为热敏电阻。
CN201610392366.7A 2016-06-03 2016-06-03 一种新型恒流源 Pending CN105913795A (zh)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610392366.7A CN105913795A (zh) 2016-06-03 2016-06-03 一种新型恒流源

Publications (1)

Publication Number Publication Date
CN105913795A true CN105913795A (zh) 2016-08-31

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045683A (en) * 1975-10-28 1977-08-30 Litton Systems, Inc. Drive circuit with constant current
CN101226412B (zh) * 2007-01-18 2011-06-01 株式会社理光 恒流电路及使用恒流电路的发光二极管驱动装置
CN202404873U (zh) * 2011-11-16 2012-08-29 武汉光动能科技有限公司 Led显示屏的恒压恒流驱动电路
CN202549254U (zh) * 2012-01-19 2012-11-21 苏州工业职业技术学院 大功率led背光源驱动电路
CN104637433A (zh) * 2013-11-11 2015-05-20 成都博元科技有限公司 适用于led显示屏的恒流驱动电路
CN205692547U (zh) * 2016-06-03 2016-11-16 苏州研工电子科技有限公司 一种新型恒流源

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045683A (en) * 1975-10-28 1977-08-30 Litton Systems, Inc. Drive circuit with constant current
CN101226412B (zh) * 2007-01-18 2011-06-01 株式会社理光 恒流电路及使用恒流电路的发光二极管驱动装置
CN202404873U (zh) * 2011-11-16 2012-08-29 武汉光动能科技有限公司 Led显示屏的恒压恒流驱动电路
CN202549254U (zh) * 2012-01-19 2012-11-21 苏州工业职业技术学院 大功率led背光源驱动电路
CN104637433A (zh) * 2013-11-11 2015-05-20 成都博元科技有限公司 适用于led显示屏的恒流驱动电路
CN205692547U (zh) * 2016-06-03 2016-11-16 苏州研工电子科技有限公司 一种新型恒流源

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