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Apparatus for lighting up multiple luminous tubes

A lighting device and lamp technology, applied in instruments, static indicators, nonlinear optics, etc., can solve the problem that there is no obvious difference between the maximum brightness and the minimum brightness of the panel, so as to improve the user experience, widen the difference, The effect of a low brightness floor

Active Publication Date: 2008-08-27
QISDA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of the lamp tube, the current of a lamp tube is limited by the maximum flow and the minimum flow, so the maximum brightness and minimum brightness of the panel cannot have a significant difference

Method used

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  • Apparatus for lighting up multiple luminous tubes
  • Apparatus for lighting up multiple luminous tubes
  • Apparatus for lighting up multiple luminous tubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Fig. 3 is a schematic circuit diagram of an embodiment of the multi-lamp lighting device provided by the present invention, including a multi-lamp lighting device 100, which is used to light the first lamp Lp 1 with the second lamp Lp 2 . The difference between the multi-tube lighting device 100 and the known multi-tube lighting device 100 in FIG. 1 is that an additional switch SW is added. 1 Coupled to the feedback circuit 106 and the first lamp Lp 1 between the low voltage terminals, and the control circuit 108 additionally generates a switch control signal S SW1 to determine that the switch SW 1 on and off. When switch SW 1 When it is turned off, only the second lamp Lp is left 2 conduction, and the feedback circuit 106 is still coupled to the second lamp Lp 2 To output the feedback signal S f to the control circuit 108, so the second lamp Lp 2 The brightness can still be continuously controlled. Since only the second lamp tube Lp is left at this time 2 co...

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Abstract

A starter of multiple lamp tube consists of a power supply actuator for providing power to each lamp tube, a feedback circuit being coupled to one of lamp tubes and being used to generate a feedback signal, a control circuit being coupled to feedback circuit and power supply actuator and being used to control power supply actuator for regulating brightness of said lamp tubes according control and feedback signals, a switch for controlling on or off state of one lamp tube among said lamp tube.

Description

technical field [0001] The present invention generally relates to a multi-tube lighting device, and more particularly relates to a multi-tube lighting device for a backlight module of a liquid crystal display (LCD). Background technique [0002] In the application of the backlight module of the LCD panel, the known technologies all use simultaneous regulation of the current of each lamp tube to achieve brightness control. However, due to the characteristics of the lamp tube, the current of a lamp tube has maximum and minimum limits, so there is no obvious difference between the maximum brightness and the minimum brightness of the panel. In addition to causing users a bad feeling, it even fails to meet the certification specifications of TCO03 and cannot be launched smoothly. [0003] Fig. 1 is a schematic circuit diagram of a known multi-lamp lighting device, including a multi-lamp lighting device 100, which is used to light the first lamp Lp 1 with the second lamp Lp 2 ....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1335G02F1/133
Inventor 黄崇荣许永沂
Owner QISDA CORP