CN100419518C

CN100419518C - Backlight module and frame

Info

Publication number: CN100419518C
Application number: CNB2004100919239A
Authority: CN
Inventors: 岳国汉; 许东明
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2004-12-29
Filing date: 2004-12-29
Publication date: 2008-09-17
Anticipated expiration: 2024-12-29
Also published as: CN1797100A

Abstract

The present invention discloses a backlight module which comprises a light emitting element, a light guiding plate and a frame, wherein the frame is contained in the light emitting element and the light guiding plate; the frame comprises a bottom plate; the bottom plate is provided with a light transmitting area composed of a plurality of through holes. When projecting on the light transmitting area, one part of light rays is reflected, and the other part emits via the through holes.

Description

Module backlight and framework thereof

[technical field]

The invention relates to a kind of module backlight of double-side, particularly a kind of module backlight and the framework that is used for this module backlight.

[background technology]

Module backlight generally includes light guide plate, light source and blooming piece, and the light that this light-guide plate guides light source sends cooperates blooming piece to convert this light to flat light source comparatively uniformly, to illuminate the display panels in the LCD.

A kind of module backlight of prior art is exposed in No. the 02132096.9th, disclosed Chinese patent application on March 17th, 2004.With reference to Fig. 1, this module backlight comprises a light guide plate 10, a light emitting source 12, a semi-permeable reflecting plate 16, first optical thin film 20 and second optical thin film 30.

This light guide plate 10 has first surface 10a, second surface 10b, the 3rd surperficial 10c and the 4th surperficial 10d.This first optical thin film 20 comprises first diffusion sheet 21, first brightening piece 22, second brightening piece 23 and second diffusion sheet 24.This second optical thin film 30 comprises first diffusion sheet 31, first brightening piece 32, second brightening piece 33 and second diffusion sheet 34.

This light emitting source 12 is provided with respect to the 3rd surperficial 10c of this light guide plate 10, and a fluorescent tube reflex housing 13 is installed in the outside of light emitting source 12, penetrates to escaping with the light that prevents light emitting source 12, improves light utilization efficiency.This first optical thin film 20 is positioned on the first surface 10a of this light guide plate 10.This semi-permeable reflecting plate 16 and this second optical thin film 30 are superimposed upon on the second surface 10b of this light guide plate 10 successively.This first optical thin film 20 and second optical thin film 30 are used to improve the quality of the light that is penetrated by light guide plate 10, as: brightness, uniformity coefficient etc.The 4th surperficial 10d of this light guide plate 10 pastes a reflector plate 15.

This semi-permeable reflecting plate 16 is used for reflecting part light, sees through another part light simultaneously, thereby makes that this module backlight can double-side.The LCD of this module backlight and a double-sided display of two

display panels

40,50 compositions.

This module backlight is to utilize semi-permeable reflecting plate 16 to realize double-side, but, the cost of this semi-permeable reflecting plate 16 is higher, and it accounts for the larger proportion of entire aphototropism mould cost, correspondingly causes adopting the entire aphototropism mould of this semi-permeable reflecting plate 16 and the cost of LCD to raise.In addition, adopt semi-permeable reflecting plate 16 also to control the luminance difference of two

display panels

40,50 not too easily.

[summary of the invention]

For overcoming the module manufacturing cost problem of higher backlight of prior art, the invention provides a kind of framework that reduces the manufacturing cost of module backlight.

The present invention also provides a kind of module backlight that reduces manufacturing cost.

Framework of the present invention can be used for module backlight, it comprises a base plate, has photic zone on this base plate, be formed with a plurality of through holes on this photic zone, ray cast is on this photic zone the time, a part is not formed the regional reflex of through hole on the base plate, a part sees through through hole and penetrates, and makes module double-side backlight.

Module backlight of the present invention comprises a light-emitting component, a light guide plate and a framework, this framework is accommodated this light-emitting component and this light guide plate, this framework comprises a base plate, has photic zone on this base plate, be formed with a plurality of through holes on this photic zone, ray cast is on this photic zone the time, and a part is not formed the regional reflex of through hole on the base plate, a part sees through through hole and penetrates, and makes module double-side backlight.

Compared to prior art, because the framework of module backlight of the present invention has a photic zone, a plurality of through holes of this photic zone can allow light see through, and realize the double-side of module backlight.The making of this framework is more or less freely, adopts the semi-permeable reflecting plate to realize the module backlight of double-side with respect to needs, and module backlight of the present invention can reduce cost.

[description of drawings]

Fig. 1 is the diagrammatic cross-section of a kind of prior art module backlight.

Fig. 2 is the three-dimensional exploded view of the present invention's module backlight.

Fig. 3 is the assembling stereogram of the present invention's module backlight.

Fig. 4 is the part sectioned view of the amplification of the present invention's module backlight.

[embodiment]

As shown in Figures 2 and 3, be the three-dimensional exploded view and the assembling stereogram of the present invention's module 1 backlight respectively.This module 1 backlight mainly comprises a framework 60, a reflector plate 70, a light guide plate 80 and a plurality of light-emitting component 900.This light-emitting component 900 is arranged on the circuit board 90.These reflector plate 70 center sections are square opening 701.

This framework 60 comprises the first side wall 61, second sidewall 62, the 3rd sidewall 63, the 4th sidewall 64 and a base plate 65.This first side wall 61, second sidewall 62, the 3rd sidewall 63, the 4th sidewall 64 and this base plate 65 surround one first receiving space 66, to accommodate this reflector plate 70 and light guide plate 80 in interior.This first side wall 61 has a plurality of grooves 611 and a passage 612, and this groove 611 is in order to accommodate this light-emitting component 900, and the conductor strip 901 of this circuit board 90 is stretched out framework 60 via this passage 612.

With reference to Fig. 4, base plate 65 center sections of this framework 60 are a square photic zone 651 together.This photic zone 651 has a plurality of light holes 652.One square sidewall 655 is outstanding from the outside surface 654 of this photic zone 651, and this square sidewall 655 surrounds one second receiving space 67 with this base plate 65.In the present embodiment, the cross section of this light hole 652 is trapezoidal, and wherein, light hole 652 becomes big from photic zone 651 inside surfaces 653 gradually to outside surface 654 directions.This light hole 652 is 0.3 millimeter at the aperture D of inside surface 653 1 sides, and the hole face 6521 of this light hole 652 is 15 degree with the angle of vertical direction.Frontier distance C minimum at the light hole 652 of outside surface 654 1 sides is 0.02 millimeter.

Module backlight 1 of the present invention also comprises brightening piece 93 on one first diffusion sheet 91, one first time brightening piece 92, one first, and brightening piece 97 on one second diffusion sheet 95, one second time brightening piece 96 and one second.This module 1 backlight is in when assembling, and this reflector plate 70 is attached at the inside surface 653 of this framework 60, the photic zone 651 that 701 pairs of the square openings of its hollow should base plate 65.These a plurality of light-emitting components 900 are housed in respectively in these a plurality of grooves 611, and brightening piece 93 is superimposed upon on this reflector plate 70 successively on this light guide plate 80, first diffusion sheet 91, the first time brightening piece 92 and first, and is housed in this first receiving space 66.Brightening piece 97 is superimposed upon in second receiving space 67 that this square sidewall 655 and this base plate 65 surround successively on this second diffusion sheet 95, the second time brightening piece 96 and second.One first anti-dazzling screen 94 sticks on the top at this position that brightening piece 93 combines with framework 60 on first, one second anti-dazzling screen 98 sticks on the top of this brightening piece 97 on second, produces light leak to avoid this module 1 backlight when combining with display panels (figure does not show).In addition, these a plurality of light-emitting components 900 also can be pasted a shading reflector plate 99 after being assembled in the framework 60 with circuit board 90 above circuit board 90.

The light that self-emission device 900 sends is through light guide plate 80 transmission, wherein a part of light reflects first exiting surface 81 ejaculations of back by light guide plate 80 through the inside surface 653 of reflector plate 70 or this photic zone 651, after second exiting surface, 82 ejaculations of another part light by light guide plate 80, directly see through this a plurality of light holes 652 and penetrate.Therefore, but this module 1 double-side backlight.And, because there is angle in the hole face 6521 of this light hole 652 with vertical direction, can be interlaced from the light that adjacent light hole 652 penetrates, thus improve irradiant uniformity coefficient.

Compared to prior art, because the framework 60 of module backlight 1 of the present invention has a photic zone 651, a plurality of light holes 652 of this photic zone 651 can allow light see through, and realize the double-side of module 1 backlight.This framework 60 is made more or less freely, and with respect to the module backlight of needs employing semi-permeable reflecting plate, module 1 backlight of the present invention can reduce cost.In addition, centre distance B by regulating this light hole 652 and the ratio of frontier distance A can be controlled the difference of 1 two exiting surface brightness of this module backlight, satisfy different demands.

Above-mentioned circuit board 90 is generally flexible circuit board, and this circuit board 90 is used for electric energy is imported this light-emitting component 900.This light-emitting component 900 is generally light emitting diode.This framework 60 is generally the glue frame.

As other embodiment of the present invention, this light hole 652 also can be designed to the through hole of square or other shape.The hole face 6521 of this light hole 652 also can be designed to other angle or 0 degree with the angle of vertical direction, and still, when this angle is 15 when spending, when making this framework 60 in the mode of ejection formation, the demoulding is the most smooth, and the yield of this framework 60 is higher.The inside surface 653 of this photic zone 651 also can plate reflectance coating, with abundant reflection projection light thereon.

Claims

1. framework that is used for module backlight, this framework comprises a base plate, it is characterized in that: have photic zone on this base plate, be formed with a plurality of through holes on this photic zone, ray cast is on this photic zone the time, a part is not formed the regional reflex of through hole on the base plate, a part sees through through hole and penetrates, and makes module double-side backlight.

2. framework as claimed in claim 1 is characterized in that: these a plurality of through holes are evenly to arrange.

3. framework as claimed in claim 1 is characterized in that: this base plate comprises relative surfaces externally and internally, and through hole becomes big from the inside surface of this base plate gradually to plate outer surface.

4. framework as claimed in claim 1 is characterized in that: the cross section of this through hole is cylindrical, square or trapezoidal.

5. module backlight, it comprises a light-emitting component, a light guide plate and a framework, this framework is accommodated this light-emitting component and this light guide plate, this framework comprises a base plate, it is characterized in that: have photic zone on this base plate, be formed with a plurality of through holes on this photic zone, ray cast is on this photic zone the time, a part is not formed the regional reflex of through hole on the base plate, a part sees through through hole and penetrates, and makes module double-side backlight.

6. module backlight as claimed in claim 5 is characterized in that: further comprise a reflector plate, this reflector plate is arranged between this base plate and the light guide plate, and this reflector plate is a through hole to part that should photic zone.

7. module backlight as claimed in claim 5, it is characterized in that: further comprise one first optical thin film, this first optical thin film is positioned at this light guide plate top, and this first optical thin film is the brightening piece and first anti-dazzling screen on the reflector plate that is superimposed, first diffusion sheet, the first time brightening piece, first.

8. module backlight as claimed in claim 7, it is characterized in that: further comprise one second optical thin film, this second optical thin film is positioned at this framework outside, and being arranged on this photic zone below, this second optical thin film is the brightening piece and second anti-dazzling screen on second diffusion sheet that is superimposed, the second time brightening piece, second.

9. module backlight as claimed in claim 7 is characterized in that: further comprise a circuit board, this light-emitting component is arranged on this circuit board.

10. module backlight as claimed in claim 9 is characterized in that: this circuit board is a flexible circuit board, and this light-emitting component is a light emitting diode.