Printed circuit board (PCB) for white light light-emitting diode (LED) of light crystal display (LCD) backlight/sidelight plate and manufacturing method of PCB
A manufacturing method and LED chip technology, applied in optics, nonlinear optics, instruments, etc., can solve problems such as insufficient uniformity of visible light, high cost of applied products, difficulty in improving light efficiency, etc., and solve the problem that color consistency is difficult to control , prolong the service life, and ensure the effect of color consistency
Inactive Publication Date: 2011-11-09
SHENZHEN FUJISUNWAH ELECTRONICS TECH
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Problems solved by technology
However, the uniformity of visible light emitted by these existing products is not high enough, the processing procedures are complicated and the reliability is not high, and the products generally require secondary processing
In addition, the cost of the application product is high, and it is greatly affected by the temperature, it is difficult to improve the light efficiency, and the service life is affected
Method used
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[0026] Below in conjunction with accompanying drawing, helmet of the present invention is described in further detail.
[0027] like Figure 1-2 , the present invention is used for the PCB of the white LED of LCD back / side light plate, comprises PCB bracket 1 and LED chip 3, and LED chip 3 is evenly distributed on PCB body 1, and the circuit connection between each LED chip, wherein LED chip 3 is blue light The chip is directly welded on the PCB bracket 1 , and each LED chip is covered with a layer of fluorescent glue 4 and formed and packaged by the fluorescent glue 4 to form a light source 6 . The LED chips are connected in series.
[0028] The method for making the aforementioned PCB of white light LEDs for LCD back / side light panels comprises the following steps:
[0029] 1) Install high thermal conductivity and high viscosity insulating fluorescent glue or conductive fluorescent glue in the crystal-bonding area of PCB bracket 1;
[0030] 2) Using high-precision equip...
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The invention discloses a printed circuit board (PCB) for a white light light-emitting diode (LED) of a light crystal display (LCD) backlight / sidelight plate. The PCB comprises a PCB bracket and LED chips, wherein the LED chips are uniformly distributed on a PCB body; and the LED chips are in circuit connection. The PCB is characterized in that: the LED chips are blue light chips and directly welded on the PCB bracket; and the LED chips are covered with a layer of fluorescent glue and molded and packaged by the fluorescent glue. The invention also discloses a manufacturing method of the PCB. By the technical scheme of the invention, the degree of uniformity of visible light emitting is high, process is simple, reliability is high, the PCB is not required to be processed secondarily, the application cost of the PCB is relatively low, influence on temperature is low, light efficiency can be improved, and the service life is prolonged.
Description
technical field [0001] The invention relates to the technical field of liquid crystal screens, in particular to a PCB of white LEDs used for LCD back / side light panels and a manufacturing method thereof. Background technique [0002] In the field of liquid crystal display LCD (Liquid Crystall Display), especially in the application of liquid crystal display backlight, the application of LED (Light-Emitting Diode, light-emitting diode) light source has been greatly expanded, and it has gradually replaced CCFL (Cold- CathodeFloresscent Lamps, cold cathode fluorescent tube) backlight. As backlights, LEDs can be broadly classified into three categories: white, monochrome, and multicolor. When using a white LED backlight, the circuit is relatively simple, and the principle of emitting white light is: a part of the blue light emitted by the chip is converted into yellow light through a medium; blue light and yellow light are mixed to produce white light, and the color coordinates...
Claims
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IPC IPC(8): H01L33/62H01L33/48G02F1/13357
Inventor 杨一江
Owner SHENZHEN FUJISUNWAH ELECTRONICS TECH