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Lighting device using series connecting mode to drive multiple light emitting units

A light-emitting unit and lighting device technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of backlight module function and cost can not be taken into account

Inactive Publication Date: 2005-08-03
HON HAI PRECISION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it can be seen from the above known technologies that the function and cost of the backlight module cannot be balanced

Method used

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  • Lighting device using series connecting mode to drive multiple light emitting units
  • Lighting device using series connecting mode to drive multiple light emitting units
  • Lighting device using series connecting mode to drive multiple light emitting units

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Please refer to image 3 , image 3 It is the first embodiment using the lighting device of the present invention. The lighting device includes N light emitting units 32 , 34 , 36 and N+1 transformers 35 , 37 , 39 . All transformers 35, 37, 39 have two ports, an input port and an output port, and each port has two terminals for receiving or outputting voltage signals. Wherein, when the input port receives a low-voltage AC signal, the output port will convert to a high-voltage AC voltage for output. If the input port receives a high-voltage AC signal, the output port is converted to a low-voltage AC voltage output. The light-emitting unit referred to in the present invention generally refers to all components capable of emitting light, such as common lamp tubes. image 3 Among them, N light-emitting units 32, 34, 36 are connected in series by N+1 transformers 35, 37, 39, so that any light-emitting unit 32, 34, 36 has a transformer at the positive high-voltage termina...

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PUM

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Abstract

The lighting device includes one light emitting module, one feedback control circuit and one DC / AC converting circuit. The light emitting module has the first light emitting unit, the second light emitting unit, the first transformer, the second transformer and the third transformer. The first transformer has the first port with the first end connected to the first light emitting unit and the second end connected to the second light emitting unit; the second transformer is connected to the positive electrode end of the first light emitting unit; and the third transformer is connected to the negative electrode end of the second light emitting unit. The DC / AC converting circuit receives one DC power source and converts it into one AC power source to the light emitting module; and the feedback control circuit receives the current through the light emitting module and outputs one control signal to the DC / AC converting circuit to regulate the current flowing through the light emitting module.

Description

technical field [0001] The invention relates to a lighting device for driving a plurality of light-emitting units in series, in particular to an lighting device for driving a plurality of light-emitting units in an interactive high-voltage to high-voltage series connection. Background technique [0002] The quality of liquid crystal displays (Liquid Crystal Display, LCD) continues to improve, and the price continues to decline, so that the application fields of liquid crystal displays are rapidly expanding. In terms of computer applications, liquid crystal displays not only allow the display screen of notebook computers to progress from the early 9:00 video graphics array (Video Graphics Array, VGA) to the current extended graphics array (Extended Graphics Array, XGA) at 13:10 as the standard, Moreover, it is stepping into the field of larger-sized monitors, and is preparing to replace part of the cathode ray tube (cathode ray tube, CRT) display market. In terms of civilian...

Claims

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Application Information

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IPC IPC(8): G02F1/1335G02F1/13357
Inventor 许正家林宪男林医旬张邓康
Owner HON HAI PRECISION IND CO LTD