CN2563602Y

CN2563602Y - Improved light guide board for liquid crystal display

Info

Publication number: CN2563602Y
Application number: CN 02231157
Authority: CN
Inventors: 蔡金土
Original assignee: QIAOLIAN INTERNATIONAL CO Ltd
Current assignee: QIAOLIAN INTERNATIONAL CO Ltd
Priority date: 2002-04-18
Filing date: 2002-04-18
Publication date: 2003-07-30
Anticipated expiration: 2012-04-18

Abstract

The utility model relates to an improved light guide board for liquid crystal display. A back light module arranged behind a liquid crystal display panel consists of an upper diffusion piece, a prismatic lens, a lower diffusion piece, a light guide board and a baffle board, which are overlapped in turn, lamp shades and lamp tubes are further arranged on the sides of the baffle board, the light guide board is provided with a light guide structure, and one surface of the light guide board is a recessed arc-shaped surface. Thus, a manufacture cost is reduced, the reflecting effect of the back light board is improved, and accordingly a higher quality is obtained.

Description

The improvement light guide plate of LCD

Technical field

The utility model relates to a kind of improvement light guide plate of LCD, especially refers to a kind of one-body molded improvement light guide plate that cancave cambered surface is arranged of light guide plate that is installed in the module backlight at LCD panel rear.

Background technology

Press, general LCD (LCD) is present very general display, the advantage that it has power saving and is easy to carry about with one, and have the advantage that is easy to carry about with one, and must be applied to the electrical equipment of portable, on electric equipment products such as computer, mobile phone, PDA.

And the structure of LCD (LCD), as shown in Figure 9, be equiped with a module b backlight in a LCD panel a rear, and this module b backlight by diffusion sheet b1, prismatic lens b2 on one, down diffusion sheet b3, light guide plate b4 and reflecting plate b5 in regular turn closed assembly form, and the side at reflecting plate b5 is equiped with lampshade b6 and fluorescent tube b7, this light guide plate b4 is printed with the luminous point that is able to leaded light again, and must light be reflected on the LCD panel a by module b backlight, in order to do with display frame.

And known light guide plate b4 in order to even distribution light source, in a transparent acrylic plate with the mode of printing print site (PATTERN), make light source be able to the mean allocation light source when entering light guide plate b4, to reach the purpose of transmitting diffusion light; Yet known light guide plate b4 cuts required size with the acryl flat board, then prints the site in acrylic plate again, therefore must be through the above job sequence of secondary, so increase manufacturing cost.And variation answers factor quite a lot of in the processing procedure, adhere to easily dust, light guide plate b4 scratch ... or the like make yield descend in a large number.

Make in the mode of printing site on the tradition light guide plate b4, and the light guide effect that this site can reach is limited, feasible less away from light source luminosity partly, thereby cause the brightness of image frame to differ easily, can reduce its image quality equally.

Summary of the invention

The purpose of this utility model is to provide a kind of improvement light guide plate of LCD, a kind of light guide plate of the module backlight that is installed in the LCD panel rear is one-body molded cancave cambered surface, in order to do reducing product weight, and must simplify processing procedure to improve speed of production, thereby reduce manufacturing cost to improve market competitiveness, and the reflecting effect that can improve backlight is to improve briliancy, so preferable quality is arranged.

The utility model is to provide a kind of improvement light guide plate of LCD, be equiped with a module backlight in a LCD panel rear, and this module backlight by diffusion sheet on, prismatic lens, down diffusion sheet, light guide plate and reflecting plate in regular turn closed assembly form, and the side at reflecting plate is equiped with lampshade and fluorescent tube, this light guide plate has light guide structure again, and the one side of this light guide plate is a cancave cambered surface.

The utility model is also to provide a kind of improvement light guide plate of LCD, is formed with vertical or horizontal leaded light rag on the cancave cambered surface on this backlight.

The utility model is also to provide a kind of improvement light guide plate of LCD, the point-like light guide structure that the regular shape that is shaped on the cancave cambered surface on this light guide plate is arranged.

The utility model is also to provide a kind of improvement light guide plate of LCD, on the cancave cambered surface on this light guide plate with sandblast or the irregular light guide structure of etching forming.

The utility model is also to provide a kind of improvement light guide plate of LCD, printed and formed printing points light guide structure on the cancave cambered surface on this light guide plate.

The utility model can reduce manufacturing cost, and can improve the reflecting effect of backlight, thus preferable quality arranged.

Description of drawings

Fig. 1 assembling three-dimensional exploded view of the present utility model.

Fig. 2 light guide plate cut-open view of the present utility model.

Another implements stereographic map Fig. 3 light guide plate of the present utility model.

Fig. 4 is the side view of Fig. 3.

Another implements front elevation Fig. 5 light guide plate of the present utility model.

Fig. 6 is the cut-open view of Fig. 5.

Another implements a kind of cut-open view Fig. 7 light guide plate of the present utility model.

Another implements another kind of cut-open view Fig. 8 light guide plate of the present utility model.

The assembling signal three-dimensional exploded view that Fig. 9 is known.

Embodiment

For making the utility model clear and definite more full and accurate, cooperate following each diagram to describe in detail as the back now:

At first, see also Fig. 1, the utility model is equiped with a module 2 backlight in a LCD panel 1 rear, and this module 2 backlight by diffusion sheet 21 on, prismatic lens 22, down diffusion sheet 23, light guide plate 24 and reflecting plate 25 in regular turn closed assembly form, and the side at reflecting plate 25 is equiped with lampshade 26 and fluorescent tube 27, this light guide plate 24 has light guide structure again, and must light be reflected on the LCD panel 1 by module 2 backlight, in order to do with display frame; Its feature is to be:

The front of this light guide plate 24 or back are a cancave cambered surface 24a, as shown in Figure 2.

According to above-mentioned structure, because the structure in order to reflection and disperse light on this light guide plate 24 is one of the forming at the cancave cambered surface 24a at light guide plate 24 the place aheads or rear, and this reflective structure is formed on the cancave cambered surface 24a, and can make the middle part that spotlight effect be arranged by cancave cambered surface 24a, make it that luminosity of nearly equivalence must be arranged with periphery, thereby the reflecting effect that improves backlight to be improving briliancy, thus preferable quality arranged.

Moreover, these light guide plate 24 the place aheads or rear have cancave cambered surface 24a thereby are reduced whole weight, see also Fig. 3,4, cancave cambered surface 24a on this light guide plate 24 is formed with vertical leaded light rag 24b or horizontal leaded light rag 24c, then forms the opposite horizontal leaded light rag 24c of direction or vertical leaded light rag 24b at the back side of light guide plate 24; And owing to the structure in order to reflection ray on this light guide plate 24 is one of the forming on light guide plate 24, thereby can be by vertically leaded light rag 24b and horizontal leaded light rag 24c spread the purpose of light to reach reflection.

And since this vertical leaded light rag 24b or laterally leaded light rag 24c be molded directly within on the cancave cambered surface 24a of light guide plate 24, thereby must simplify manufacturing course, reducing manufacturing cost, so the raising market competitiveness.

Vertical leaded light rag 24b on this light guide plate 24 and horizontal leaded light rag 24c straight forming again so do not need via secondary processing, thereby are improved speed of production again, must reach the reduction manufacturing cost equally, to improve the purpose of market competitiveness.

In addition, the cancave cambered surface 24a on this light guide plate 24 go up the point-like reflective structure 24d that arranges of the regular shape that is shaped, shown in Fig. 5,6; Or with sandblast, the irregular reflective structure 24e of etching forming, as shown in Figure 7; Also or with the mode printing points reflective structure 24f that is shaped of printing, as shown in Figure 8, this for of the present utility model various other plant embodiment, reference is provided.

Comprehensive the above, the disclosed structure of the utility model does not in the past have, and can reach above-mentioned effect really, manages the important document that has possessed utility model patent, files an application novel patent in accordance with the law.

Claims

1, a kind of improvement light guide plate of LCD, be equiped with a module backlight in a LCD panel rear, and this module backlight by diffusion sheet on, prismatic lens, down diffusion sheet, light guide plate and reflecting plate in regular turn closed assembly form, and the side at reflecting plate is equiped with lampshade and fluorescent tube, this light guide plate has light guide structure again, it is characterized in that: the one side of this light guide plate is a cancave cambered surface.

2, the improvement light guide plate of LCD according to claim 1 is characterized in that: be formed with vertical or horizontal leaded light rag on the cancave cambered surface on this backlight.

3, the improvement light guide plate of LCD according to claim 1 is characterized in that: the point-like light guide structure that the regular shape that is shaped on the cancave cambered surface on this light guide plate is arranged.

4, the improvement light guide plate of LCD according to claim 1 is characterized in that: on the cancave cambered surface on this light guide plate with sandblast or the irregular light guide structure of etching forming.

5, the improvement light guide plate of LCD according to claim 1 is characterized in that: printed and formed printing points light guide structure on the cancave cambered surface on this light guide plate.