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Light source group with protecting mechanism

A technology for light source groups and components, applied in the field of light source groups, can solve problems such as damage, heating of the driving chip 22, damage to normal light-emitting diodes, etc., so as to avoid damage and ensure normal operation.

Inactive Publication Date: 2010-04-21
ULTRA CHIP INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the voltage that the driver chip 22 can bear is limited. If too much voltage falls on the driver chip 22, the driver chip 22 will generate heat and even be damaged. In more serious cases, it may also cause other normal light emission. Damage to diode 211

Method used

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  • Light source group with protecting mechanism
  • Light source group with protecting mechanism
  • Light source group with protecting mechanism

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Experimental program
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Embodiment Construction

[0038] The advantages and spirit of the present invention, as well as more detailed embodiments can be further understood from the following embodiments and the accompanying drawings.

[0039] Please refer to image 3 , image 3 It is a schematic circuit diagram of the light source group of the present invention. The light source group includes a driving chip 32, a MOS component 33, a group of light-emitting diode strings 31 and a comparator 34.

[0040] The driving chip 32 is arranged on a substrate (not shown in the figure). The MOS device 33 has a first terminal 331 and a second terminal 332, and the first terminal 331 is connected to the driving chip 32. The light-emitting diode string (LED string) 31 is formed by connecting a plurality of light-emitting diodes (LEDs) 311 in series, and one end of the light-emitting diode string 31 is electrically connected to the second end 332 of the MOS device 33, and passes through the first end of the MOS device 33. 331 is coupled to t...

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PUM

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Abstract

The invention provides an optical source group applied to the back light module, including a driving chip, at least a group of LED string and at least a comparator. The switch module has a first end and a second end, and the first end is connected to the driving chip. One end of the LED string is electrically connected to the second end of the switch end and coupled to the driving chip through theswitch module, the other end is connected to the input voltage. The comparator has a first input end, a second input end, wherein the first end is electrically connected to the second end of the switch module. A reference voltage is input to the comparator through the second end, making the comparator output a comparison signal to the driving chip. The driving chip makes the switch module turn on / turn off by the comparison signal, further controlling the on / off of the LED string. The invention can avoid the driving chip onerheat to damage to ensure the normal operation of the driving chip.

Description

Technical field [0001] The present invention relates to a light source group, in particular to a light emitting diode (LED) light source group using a feedback circuit to generate a protection mechanism. Background technique [0002] Non-self-luminous display panels, such as liquid crystal panels, usually require a backlight source to display images. Among the various existing backlight technologies, the side-side light-emitting backlight module meets the demand for thinner products. [0003] Please refer to figure 1 , figure 1 It is a schematic diagram of the light source group 1 and the light guide plate 50 in the existing backlight module. The so-called side-end light-incident backlight module is that the light source group 1 is arranged on one side end 52 of the light guide plate 50, and this side end 52 is the light incident surface of the light guide plate 50. The light emitted by the light source group 1 enters the light guide plate 50 from the side end 52 of the light gui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S2/00F21V23/00F21V25/00F21Y101/02F21K9/238F21Y115/10
Inventor 吴泰峰
Owner ULTRA CHIP INC