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Backlight device, liquid crystal display device, method for assembling backlight device and substrate device for connecting fluorescent tube

A backlighting and assembly method technology, applied to lighting devices, components of lighting devices, circuit layout, etc., can solve the problems of reduced operating efficiency, significant problems, and labor-intensive installation of lamp units, so as to improve operating efficiency and suppress brightness uneven effect

Inactive Publication Date: 2009-07-22
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This work involves counting the number of installations and switching lamps. The installation of the lamp unit is labor-intensive, which may cause installation errors and lamp damage.
Especially when installing fluorescent tubes for backlighting with a diameter of φ2 millimeters (mm) to 5 millimeters (mm) and a total length of tens of centimeters (cm) to several meters (m), the problem is significant.
Therefore, the connection structure of fluorescent tubes as in Patent Document 1 is at least a factor that reduces working efficiency.

Method used

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  • Backlight device, liquid crystal display device, method for assembling backlight device and substrate device for connecting fluorescent tube
  • Backlight device, liquid crystal display device, method for assembling backlight device and substrate device for connecting fluorescent tube
  • Backlight device, liquid crystal display device, method for assembling backlight device and substrate device for connecting fluorescent tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0080] figure 2 It is a diagram showing a configuration example of the backlight device 2 according to Embodiment 1 of the present invention. figure 2 In (A), 211 ( 211R, L) denotes electrodes at both ends of the fluorescent tube 21 , 212 ( 212R, L) denotes wiring from the electrodes 211 , and 213 ( 213R, 213L) denotes gathering members for gathering the wiring 212 . The backlight device 2 includes a gathering member 213 that gathers the wires 212 drawn from the electrodes 211 at two or more ends of the plurality of fluorescent tubes 21, and connects the electrodes of the plurality of fluorescent tubes 21 to two electrodes by connecting with the gathering member 213. The conduction means 31 (31R, 31L) connected to each other conducts the electrodes 211 at either ends of the two fluorescent tubes 21 by the conduction means 31. In this embodiment, the gathering member 213 gathers the electrodes 211 at both ends, connects the electrode 211 at one end to the conduction means 31...

Embodiment approach 2

[0097] image 3 It is a diagram showing a configuration example of the backlight device 2 according to Embodiment 2 of the present invention. image 3 In (A), the backlight device 2 has the same composition as that of the first embodiment except that the composition of the inverter transformer 29 and the first connecting member 30 is different. The first connection member 30 of this embodiment is connected to the gathering member 213 from the fluorescent tube unit, and the high voltage from the inverter transformer 29 on the inverter circuit board 28 is supplied to both electrodes of the electrodes 211 of the fluorescent tube unit. AC voltage. By arranging one inverter transformer 29 on each of the two electrodes of the electrodes 211 , a high-voltage AC voltage can be supplied to the two electrodes 211 . Therefore, the fluorescent tube unit is driven on both sides by the two inverter transformers 29 .

[0098] With such a structure, it is possible to obtain the same effect...

Embodiment approach 3

[0100] Figure 4 It is a diagram showing a configuration example of the backlight device 2 according to Embodiment 3 of the present invention. Figure 4 In (A), the backlight device 2 has the same composition as that of the first embodiment except that the composition of the inverter transformer 29 and the first connecting member 30 is different. The first connection member 30 of this embodiment is connected to the gathering member 213 from the fluorescent tube unit, and the high voltage from the inverter transformer 29 on the inverter circuit board 28 is supplied to both electrodes of the electrodes 211 of the fluorescent tube unit. AC voltage. By arranging one inverter voltage transformer 29 for each of the two electrodes 211 , a high-voltage AC voltage can be supplied to the two electrodes 211 . Therefore, the fluorescent tube unit is driven on both sides by an inverter transformer 29 .

[0101] With such a structure, it is possible to obtain the same effect as that of t...

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PUM

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Abstract

A fluorescent tube is prevented from being wrongly attached and broken when being attached, and luminance nonuniformity of backlight due to luminance difference generated in a tube axis direction of the fluorescent tube is reduced. A backlight device 2 is provided with a plurality of fluorescent tubes 21 having electrodes 211 at both ends; a bundling member 213 for bundling wirings 212 pulled out from the electrode 211 on one side of two or more of the fluorescent tubes 21; and a conducting means 31 for achieving conduction between the electrodes of the two fluorescent tubes among the fluorescent tubes 21 by being connected with the bundling member 213. The conducting means 31 permits a current to be carried between the electrodes of the two fluorescent tubes 21, which are bundled by the one bundling member 213, and the conducting means are arranged on inverter circuit substrate 28, respectively, not to be adjacent to each other.

Description

technical field [0001] The present invention relates to a backlight device including a plurality of fluorescent tubes driven by an inverter circuit, a liquid crystal display device using the backlight device, a method of assembling the backlight device, and a circuit board device for connecting fluorescent tubes. Background technique [0002] In recent years, with the increase in the size of liquid crystal televisions and the like, backlights are also required to be increased in size. In order to meet the demand for large size, energy saving and low cost, the substantially central portion of the long straight fluorescent lamp is bent to produce a U-shaped or C-shaped curved fluorescent lamp instead of the conventional straight fluorescent lamp. , and developed a backlight using this curved tube fluorescent lamp as a light source. [0003] In the case of using the backlight of the curved tube fluorescent lamp, a relatively uniform temperature distribution is formed on a scre...

Claims

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Application Information

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IPC IPC(8): F21V8/00G02F1/13357F21V23/00F21Y103/00
CPCY02B20/183
Inventor 荒井政广南部浩平清水将树
Owner SHARP KK