CN1308753C

CN1308753C - Liquid crystal display device and light source device thereof

Info

Publication number: CN1308753C
Application number: CNB031285783A
Authority: CN
Inventors: 高宏成
Original assignee: Hannstar Display Corp
Current assignee: Hannstar Display Corp
Priority date: 2003-05-07
Filing date: 2003-05-07
Publication date: 2007-04-04
Anticipated expiration: 2023-05-07
Also published as: CN1549021A

Abstract

The present invention relates to a liquid-crystal displaying machine and light source device thereof, which comprises a panel of the liquid-crystal displaying machine used for displaying images, a first frame, a second frame and a first optical membrane, wherein the first frame contains the panel of the liquid-crystal displaying machine, the second frame is provided with a plurality of lamp tubes used for projecting light rays to the panel of the liquid-crystal displaying machine, the first optical membrane is arranged on the first frame and is positioned between the lamp tubes of the second frame and the panel of the liquid-crystal displaying machine, and the frame and the second frame are separable. The present invention has the separable frames used for containing the lamp tubes, and subsequent maintenance work can be conveniently carried out.

Description

A kind of LCD and light supply apparatus thereof

Technical field

The present invention relates to a kind of LCD and light supply apparatus thereof, be meant a kind of LCD and light supply apparatus thereof especially with the shell that can dismantle easily.

Background technology

Along with the progress of electronics technology, the accompanied electronic product is in vogue especially in daily life, increases day by day for the demand of the display compact, that power consumption is low.LCD because have that power consumption is low, thermal value is few, advantage such as in light weight and non-light emitting type display, be often used in the above-mentioned electronic product, even progressively replace traditional cathode-ray tube display.Figure 1 shows that the structure of existing LCD.Generally speaking, LCD comprises that the middle panel of LCD 10, that is provided with liquid crystal material of a two substrates is disposed at the backlight module 20 and the

shell

11,12 of panel of LCD 10 belows.Backlight module 20 is uniformly distributed to the light that a light source is sent on the surface of liquid crystal panel 10.Being used for backlight liquid crystal display module 20 generally can be divided into: directly descend light source pattern and edge light pattern.With regard to large-sized LCD, direct type backlight module has and is easy to make and advantage cheaply, is widely used.With regard to direct type backlight module, as shown in Figure 2, backlight module 20 comprises a shell 70, shell 70 has a reflector plate 60 and is disposed at shell 70 lower surface, and the fluorescent tube 50 such as cold-cathode tube is positioned at that shell 70 bottoms, a diffuser plate 40 are positioned on the shell 70, blooming piece 30 is disposed on the diffuser plate 40.Fluorescent tube 50 arranged spaced are in the viewing area of panel of LCD 10.Because the fluorescent tube 50 as light source is a line source, therefore the illumination on panel of LCD 10 is uneven, diffuser plate 40 and blooming piece 30 must be disposed between fluorescent tube 50 and the panel of LCD 10, is used to provide even planar light source.Provide multiple backlight module in the prior art, as 6407781B2 United States Patent (USP) that licensed to Kitada on June 18th, 2002 and the 6417833B1 United States Patent (USP) that licensed to people such as Takemoto on July 9th, 2002.With regard to present known technology, the fluorescent tube of backlight module be in the various parts of LCD serviceable life the shortest part.When fluorescent tube damages, must progressively dismantle housing, panel of LCD, backlight module shell, optical thin film and the diffuser plate of LCD, could change fluorescent tube at last.This process is a difficulty and complicated, and must carry out in dust free room, otherwise panel of LCD or blooming piece are polluted and reduce the quality of LCD.Moreover large-sized LCD can't be carried out on-site maintenance under the situation that dust free room can't be provided.

Summary of the invention

The objective of the invention is, a kind of LCD is provided, have separable framework, be used to hold fluorescent tube, can make follow-up maintenance activity comparatively convenient.

The objective of the invention is to realize: a kind of LCD by following technological means, has a panel of LCD that is used for show image, it is characterized in that: comprise that one holds first framework of panel of LCD, one has a plurality of throw light to second frameworks and of the fluorescent tube of panel of LCD that are used for is disposed on first framework between the fluorescent tube of second framework and first blooming piece between the panel of LCD, wherein second framework and first framework are separable structure, be provided with a jut at first framework or second framework on one of them, and one match mutually with jut and be arranged on groove on wherein another of first framework and second framework, and first framework and second framework are by jut and groove slides mutually and engaging mutually.

Jut and groove have the profile of dovetail.Jut and groove have half head and a neck part.First framework of described LCD and light supply apparatus thereof also is provided with a slit that is used to hold first blooming piece.Second framework is provided with second blooming piece.Second blooming piece is set in the slit of second framework.

The light supply apparatus of a kind of LCD provided by the invention, wherein LCD comprises a shell, it is characterized in that: light supply apparatus comprises that one is disposed at the framework on the LCD outer housing, a plurality of being disposed at is used for throw light is used for show image to the fluorescent tube and of LCD panel of LCD in the framework, the shell of its middle frame and LCD is a separable structure, one of them is provided with a jut framework of LCD outer housing and light supply apparatus, and one match mutually with jut and wherein another of the framework that is disposed at LCD outer housing and light supply apparatus on groove, the shell of LCD and the framework of light supply apparatus are by jut and groove slides mutually and engaging mutually.

Jut and groove have the profile of dovetail, and jut and groove have half head and a neck part.The framework of described LCD and light supply apparatus thereof is provided with a blooming piece.The blooming piece of described LCD and light supply apparatus thereof is received in the slit that is arranged at framework.

The invention has the advantages that: 1, LCD of the present invention has separable framework, is called light supply apparatus or lamp box, can hold a plurality of fluorescent tubes.When needs are changed fluorescent tube, only need framework or lamp box are separated with LCD, can contact fluorescent tube.2, the object of the present invention is to provide a separable light supply apparatus or a lamp box, helping the replacing of fluorescent tube, the therefore slidably fastened component of pairing, that is neck projection and neck groove can further be convenient to the assembly and disassembly of LCD.

Description of drawings

Fig. 1 launches synoptic diagram for the volume rendering of existing LCD.

Fig. 2 is the cross section view along Fig. 1 section line 2-2.

Fig. 3 is the longitudinal profile synoptic diagram of the LCD of the embodiment of the invention.

Fig. 4 is the horizontal section synoptic diagram of LCD shown in Figure 3.

Fig. 5 is the part amplification profile synoptic diagram of LCD shown in Figure 3.

Fig. 6 is the neck projection and the groove part amplification profile synoptic diagram of the pairing of another embodiment of the present invention.

Fig. 7 is the longitudinal profile synoptic diagram of the LCD of another embodiment of the present invention.

Fig. 8 is the horizontal section synoptic diagram of LCD shown in Figure 7.

Embodiment

Describe structure of the present invention in detail below in conjunction with accompanying drawing.

Fig. 3 and the LCD 100 that Figure 4 shows that one embodiment of the invention.LCD 100 comprises that a panel of LCD 110, that is used for show image is used for throw light to the backlight module 112 and of panel of LCD 110 and is used for housing 160 that backlight module 112 and panel of LCD 110 are fixed together.Panel of LCD comprises two printed circuit board (PCB) (not shown), is used for will controlling and drive signal by winding carrying encapsulation and is delivered to panel of LCD 110.Backlight module 112 comprises one first framework 130 and one second framework 120, and both all have the profile that is substantially rectangle, and corresponding and adjacent with panel of LCD 110.First framework 130 has one first slit 132, is disposed at first framework, 130 inboards, is used to embed one first diffuser plate 134.The insider understands, and first diffuser plate 134 can comprise a plurality of blooming pieces, such as prismatic lens and diffuser plate; Diffuser plate is used to make light more even, and prismatic lens is used to make light to concentrate on vertical direction.One backboard 142 is installed at and forms a cavity on second framework 120, to hold a plurality of fluorescent tubes 140.Backboard 142 and second framework, the 120 inboard reflecting plates 146 that cover are used to reflect the light that fluorescent tube 140 penetrates.Second framework 120 has one second slit 122, is disposed at second framework, 120 inboards, is used to embed one second diffuser plate 124.One transformer 144 is connected with fluorescent tube 140, is used for power delivery to fluorescent tube 140.Fluorescent tube 140 is generally a cold-cathode tube.

As shown in Figure 5, have the slidably clamping close device of pairing between second framework 120 and first framework 130, comprise a neck projection 136 and a neck groove 126.Neck projection 136 and neck groove 126 are disposed at respectively on the corresponding side of first framework 130 and second framework 120.The neck projection 136 of pairing and the profile of neck groove 126 are for cutting triangle.Neck projection 136 can embed in the neck groove 126, and slides mutually, but can't directly be separated from each other.

During assembling, first framework 130 can assemble the panel of LCD 110 and first diffuser plate 134 earlier; Second framework 120 also can assemble second diffuser plate 124, backboard 142 and fluorescent tube 140 earlier.Afterwards, the neck projection 136 of first framework 130 embeds in the neck groove 126 of second framework 120, and slides into suitable position therein.Housing 160 is disposed at second framework 120 and first framework, 130 outsides, but and mat plurality of fixed part (such as bolt) 162 fix second framework 120 and first framework 130.

When the fluorescent tube 140 of LCD 100 damages, the operator need untie bolt 162, again with second framework 120 with respect to first framework 130, slide along neck groove 126 and neck projection 136, can unload second framework 120, so just, can change fluorescent tube 140, and the backlight module 112 of further maintenance fluid crystal display 100.Moreover second framework 120 and first framework 130 can be by the plastic cement manufacturings.

The insider can understand, and the neck projection of pairing and neck groove are not limited to illustrated dovetail or cut leg-of-mutton profile, and the pairing mechanism that any other has neck all can be used.Certainly, the neck projection is also configurable on second framework, and neck groove then is configured on first framework.

Figure 6 shows that the slidably clamping close device of a pairing of another embodiment of the present invention, comprise a neck projection 136 and a neck groove 126.The neck projection 136 and the neck groove 126 of pairing have half head and a neck part.Neck projection 136 also can embed neck groove 126, and slides with respect to neck groove 126.

A Fig. 7 and a LCD 200 that Figure 8 shows that another embodiment of the present invention.LCD 200 is similar to LCD 100 substantially, and wherein similar element indicates with similar figure number.One second framework 220 of LCD 200 does not provide astigmatism plate, and diffuser plate 234 comprises all blooming pieces that are installed in LCD 200, and embeds in the slit 232 of first framework 230.Under this configuration, the operator can contact fluorescent tube 240 more easily when maintenance.

Claims

1, a kind of LCD, has a panel of LCD that is used for show image, it is characterized in that: comprise that one holds first framework of panel of LCD, one has a plurality of throw light to second frameworks and of the fluorescent tube of panel of LCD that are used for is disposed on first framework between the fluorescent tube of second framework and first blooming piece between the panel of LCD, wherein second framework and first framework are separable structure, be provided with a jut at first framework or second framework on one of them, and one match mutually with jut and be arranged on groove on wherein another of first framework and second framework, and first framework and second framework are by jut and groove slides mutually and engaging mutually.

2, LCD according to claim 1 is characterized in that: jut and groove have the profile of dovetail.

3, LCD according to claim 1 is characterized in that: jut and groove have half head and a neck part.

4, LCD according to claim 1 is characterized in that: first framework also is provided with a slit that is used to hold first blooming piece.

5, LCD according to claim 1 is characterized in that: second framework is provided with second blooming piece.

6, LCD according to claim 5 is characterized in that: second blooming piece is set in the slit of second framework.

7, a kind of light supply apparatus of LCD, wherein LCD comprises the panel of LCD that a shell and is used for show image, it is characterized in that: light supply apparatus comprises that one is disposed at the framework on the LCD outer housing, and a plurality of being disposed at is used for the fluorescent tube of throw light to panel of LCD in the framework, the shell of its middle frame and LCD is a separable structure, one of them is provided with a jut framework of LCD outer housing and light supply apparatus, and one match mutually with jut and wherein another of the framework that is disposed at LCD outer housing and light supply apparatus on groove, the shell of LCD and the framework of light supply apparatus are by jut and groove slides mutually and engaging mutually.

8, the light supply apparatus of LCD according to claim 7 is characterized in that: jut and groove have the profile of dovetail.

9, the light supply apparatus of LCD according to claim 7 is characterized in that: jut and groove have half head and a neck part.

10, the light supply apparatus of LCD according to claim 7 is characterized in that: framework is provided with a blooming piece.

11, the light supply apparatus of LCD according to claim 10 is characterized in that: blooming piece is received in the slit that is arranged at framework.