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Novel constant current source

A constant current source, a new type of technology, used in instruments, static indicators, etc., can solve the problems of unclear screen and low screen brightness, and achieve the effect of improving service life

Inactive Publication Date: 2016-08-31
SUZHOU KINSOON ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After using the outdoor display and indoor multimedia display for a period of time, due to light

Method used

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  • Novel constant current source

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Embodiment Construction

[0013] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0014] according to figure 1 , a new type of constant current source, including a chip 3 and a peripheral circuit arranged around the chip 3, the peripheral circuit is provided with a number of calibrating resistors 1 connected in series, and a number of calibrating resistors 1 connected in series are arranged between the calibrating resistor 1 and the chip 3 The compensation resistor 2, the two ends of the compensation resistor 2 can be short-circuited so that all the current passes through the compensation resistor 2.

[0015] Further, the resistance values ​​of each of the compensation resistors are equal or unequal.

[0016] Further, both the calibration resist...

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Abstract

The invention discloses a novel constant current source. The constant current source comprises a chip and a peripheral circuit arranged around the chip. The peripheral circuit is provided with several calibration resistors which are connected in series. Several compensation resistors which are connected in series are arranged between the calibration resistors and the chip. Two ends of the compensation resistors can be in a short circuit state so that all the currents flow through the compensation resistors. Through arranging the compensation resistors, an output current range is adjustable, an LED display screen maintains to be same brightness with the brightness of an original state, and a service life of a product is increased.

Description

technical field [0001] The invention relates to a novel constant current source suitable for LED display screens. Background technique [0002] In big cities, outdoor traditional media is gradually being replaced by new forms such as outdoor video and outdoor LED. The data shows that the growth of outdoor advertising mainly comes from outdoor video, outdoor LED, outdoor LCD, outdoor electronic newspaper reading column, and outdoor touch inquiry machine. Compared with 2006, the growth rate of bus mobile TV in 2007 was more than 200%, and the growth rate of outdoor LED was also amazing, reaching 148%. In the outdoor advertising market in the United States, outdoor video and LED occupy a large share. [0003] After the outdoor display and indoor multimedia display have been used for a period of time, due to light decay, the brightness of the screen is lower than at the beginning, making it difficult to see the screen. Contents of the invention [0004] The technical proble...

Claims

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Application Information

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IPC IPC(8): G09G3/32
CPCG09G3/32
Inventor 姜小虎
Owner SUZHOU KINSOON ELECTRONICS TECH CO LTD
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