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Power adapter for directly driving LED lamp tube in liquid crystal display product

A technology of liquid crystal display products and LED lamps, which is applied in the direction of electric light source, electroluminescent light source, light source, etc., can solve the problems of high cost of BOM materials and a large number of drive circuit parts, and achieve market competitiveness and total cost. Decrease, the effect of reducing the number of parts

Inactive Publication Date: 2019-11-05
TPV ELECTRONICS (FUJIAN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For existing liquid crystal display products that use an external power adapter, the LED lamp drive circuit on the main substrate usually uses a DC-DC Boost boost drive circuit, which has a large number of parts and a high BOM material cost

Method used

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  • Power adapter for directly driving LED lamp tube in liquid crystal display product
  • Power adapter for directly driving LED lamp tube in liquid crystal display product
  • Power adapter for directly driving LED lamp tube in liquid crystal display product

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Embodiment approach

[0027] The AC-DC conversion circuit, direct drive LED lamp tube drive circuit and DC-DC conversion circuit related to the present invention are all existing mature technologies, and the AC-DC conversion circuit and DC-DC conversion circuit will not be described in detail here. As a preferred embodiment, the direct-push LED lamp drive circuit of the present invention is driven by the related technology of the authorized patent CN201610551279: a single-feedback direct-push DC dimming LED lamp drive circuit. The driving principle of this patent is as follows: Figure 4 shown.

[0028]The invention cancels the DC-DC Boost boost LED lamp drive circuit on the original main substrate, the PCB space size of the original main substrate becomes smaller, and the space occupied by the iron plate of the mechanism is correspondingly smaller, so that the liquid crystal display product can be designed More and better ID shapes. In the present invention, a direct push type LED lamp tube drivi...

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PUM

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Abstract

The invention discloses a power adapter for directly driving an LED lamp tube in a liquid crystal display product, which is characterized in that an LED lamp tube driving circuit is placed on a PCB (Printed Circuit Board) inside the power adapter, the space size of the PCB of a main substrate inside the liquid crystal display product is reduced, and thus the liquid crystal display product can be designed with more and better-looking ID shapes. The reduction of the PCB size of the main substrate can reduce the material cost of a mechanism iron plate and the PCB, and the total cost of the liquidcrystal display product is also reduced, thereby being more conducive to the market competitiveness of the liquid crystal display product in terms of price. The adoption of the direct-drive LED lamptube driving circuit reduces the BOM material cost of LED lamp tube driving, reduces the number of components of the LED lamp tube driving circuit and improves the manufacturing and production efficiency.

Description

technical field [0001] The invention relates to the field of display equipment, in particular to a power adapter for directly driving LED lamp tubes inside liquid crystal display products. Background technique [0002] like figure 1 As shown, there are LCD products powered by an external power adapter. The main substrate inside the LCD product is composed of LED lamp drive circuit, DC-DC to 5V / 3.3V / 2.5V / 1.8V circuit and image processor. Scaler and other components. For liquid crystal display products using external power adapter products, the LED lamp drive circuit is placed on the main substrate and occupies a large space on the main substrate, which limits the reduction in the size of the iron plate of the mechanism and is not conducive to the ID design of the overall product appearance. [0003] The main substrate of existing liquid crystal display products usually adopts FR-4 double-panel design. At present, the price of the double-panel FR-4 board used on the main sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
Inventor 陈旭彪肖荣军曾维禄余祚尚
Owner TPV ELECTRONICS (FUJIAN) CO LTD
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