CN109681792A

CN109681792A - LED backlight mould group

Info

Publication number: CN109681792A
Application number: CN201710983496.2A
Authority: CN
Inventors: 戴丰源; 邱进隆; 庄耀坚; 王何立颖; 黄雍伦
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: 2017-10-18
Filing date: 2017-10-18
Publication date: 2019-04-26

Abstract

A kind of LED backlight mould group, including LED light source and expand tabula rasa, the multiple lens for expanding tabula rasa and including a bottom plate and being formed on bottom plate, the accommodating hole for accommodating the LED light source is formed on the bottom plate, the expansion tabula rasa is glass material, and the light transmittance of the glass material is 95% or more, the colo(u)r bias of the glass material is less than or equal to 3/1000, the heat resistance of the glass material is more than or equal to 750 degrees Celsius, and the bottom plate and the lens are integral structure made of the glass material cools down after high-temperature fusion forms.

Description

LED backlight mould group

Technical field

The present invention relates to a kind of backing structure, in particular to a kind of LED backlight mould group.

Background technique

In straight-down negative TV, backlight module is important light source part.Wherein, in larger-size straight-down negative TV In, in order to guarantee display effect simultaneously save the cost, usually reduce backlight module in LED quantity, while be arranged expand tabula rasa with And photo structure is expanded in setting on light guide plate, so that the emergent ray of LED is diffused light mixing.

In the backlight module of existing TV, expands tabula rasa and expansion photo structure is separately formed, and expand tabula rasa and be formed in expansion Astigmatism portion on tabula rasa is all made of transparent PC PMMA material.However, when TV works long hours, in backlight module LED shines for a long time can generate biggish thermal energy simultaneously, so as to cause expanding tabula rasa and being formed in the expansion photo structure expanded on tabula rasa Phenomena such as aging, yellow, and LED backlight mould group is made to generate color difference, it eventually leads to television image and is distorted.

Summary of the invention

In view of this, the present invention provides the backlight module that a kind of color difference is small, performance is stable.

A kind of LED backlight mould group, including LED light source and expansion tabula rasa, the expansion tabula rasa include a bottom plate and are formed in Multiple lens on bottom plate, the accommodating hole for accommodating the LED light source is formed on the bottom plate, and the expansion tabula rasa is glass material Matter, and the light transmittance of the glass material is 95% or more, the colo(u)r bias of the glass material is less than or equal to 3/1000, the glass The heat resistance of glass material is more than or equal to 750 degrees Celsius, and the bottom plate and the lens are that the glass material passes through high-temperature fusion Integral structure made of cooling down after molding.

Further, the bottom plate has a first surface and the second surface opposite with the first surface, the appearance It sets hole to be recessed to be formed from the second surface towards the first surface, the first surface is to form by being atomized blasting treatment Rough surface.

Further, the first surface of the lens from the bottom plate protrudes outward, the lens have with it is described The side of the connected bottom surface of the first surface of bottom plate, the top surface opposite with the bottom surface and the connection bottom surface and the top surface Face.

Further, the top surface area of the lens is less than the base area, and the top surface of the lens is curved surface.

Further, the cross section of the accommodating hole is trapezoidal, and the hole of the accommodating hole first surface court without leave It is gradually increased to the second apparent bearing.

Further, the aperture positioned at the first surface side of the accommodating hole is transversal less than the bottom surface of the lens Face width.

Further, the LED light source is arranged in a one-to-one correspondence with the lens.

Further, the bottom surface of the lens is rough surface.

In LED backlight mould group of the present invention, the lens and the bottom plate pass through the glass material melt molding After cool down and integral structure, therefore the heat resistance for expanding tabula rasa is increased and the problems such as slow down aging, so that the backlight The performance of mould group is more stable.Further, as the bottom surface of lens rough surface made of being atomized blasting treatment, increase The angle of the LED light source emergent ray, reduces the light mixing distance of LED light source, is so guaranteeing that original light-out effect is same When can reduce the integral thickness of the backlight module.

Detailed description of the invention

Fig. 1 is the stereoscopic schematic diagram of LED backlight mould group described in the embodiment of the present invention.

Fig. 2 is the cross-sectional view along II-II line of LED backlight mould group described in Fig. 1.

Main element symbol description

Backlight module	100
		Expand tabula rasa	10
LED light source	20
		Bottom plate	11
Lens	12
		First surface	111
Second surface	112
		Accommodating hole	113
Bottom surface	121
		Top surface	122
Side	123

Above-mentioned attached drawing is further illustrated the present invention by following specific embodiment.

Specific embodiment

Below by the attached drawing in embodiment of the present invention, the technical solution in embodiment of the present invention is carried out clear, complete Site preparation description, it is clear that described embodiment is only some embodiments of the invention, rather than whole embodiment party Formula.Based on the embodiment in the present invention, those of ordinary skill in the art are obtained without making creative work Every other embodiment, shall fall within the protection scope of the present invention.

The noun of locality " first " used herein, " second " be so that the position of first substrate described in the used time defines, And it does not limit.

Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool The purpose of the embodiment of body, it is not intended that in the limitation present invention.

As shown in Figure 1, backlight module 100 described in one embodiment of the invention includes an expansion tabula rasa 10 and several LED lights Source 20.

With reference to shown in attached drawing 2, the expansion tabula rasa 10 is glass material.The glass material meets following feature: thoroughly Light rate is more than or equal to 95；Colo(u)r bias is less than or equal to 3/1000；Heat resistance is more than or equal to 750 degrees Celsius.

The several lens 12 for expanding tabula rasa 10 and including a bottom plate 11 and being formed on the bottom plate 11.The lens 12 It is integral structure made of cooling down after the glass material melt molding with the bottom plate 11.The lens 12 and LED Light source 20 is arranged in a one-to-one correspondence.

The bottom plate 11 is in tabular, has a first surface 111 and opposite with the first surface 111 second Surface 112.The first surface 111 is by rough surface made of atomization blasting treatment.

The bottom plate 11 is formed further with the accommodating hole formed from second surface 112 towards the recess of first surface 111 113.The accommodating hole 113 is arranged in a one-to-one correspondence with the LED light source 20 and accommodates the LED light source 20 wherein.

In embodiments of the present invention, the cross section of the accommodating hole 113 is trapezoidal, hole without leave the bottom plate 11 first Surface 111 is gradually increased towards 112 direction of second surface.

The first surface 111 of the lens 12 from the bottom plate 11, which protrudes outward, to be formed.Specifically, the lens 12 have Bottom surface 121, the top surface 122 opposite with the bottom surface 121 and company coplanar with the first surface 111 of the bottom plate 11 and be connected Connect the side 123 of the bottom surface 121 and the top surface 122.The bottom surface 121 is by coarse made of atomization blasting treatment Face.The top surface 122 of the lens 12 is curved surface.The side 123 is annular surface.The area of the bottom surface 121 of the lens 12 is big Area in the top surface 122.The cross-sectional width of 12 bottom surface 121 of lens is greater than the accommodating hole 113 and is located at described the One surface, 111 1 lateral aperture.

When LED backlight mould group 100 of the present invention works, pass through the lens 12 from 20 emergent ray of LED light source Further it is emitted after diffusion.The bottom surface 121 of the lens 12 is by rough surface made of atomization blasting treatment, therefore LED light 20 emergent light of source is emitted after reflecting behind the bottom surface 121 from the top surface 122.The bottom surface 121 and the top surface 122 It increases the light-emitting angle of light and reduces the light mixing distance between multiple LED light sources 20.Further, light is from institute When stating the outgoing of top surface 122 of lens 12, some light is totally reflected in the top surface 122, thus again by the bottom surface 121 It is emitted after secondary refraction reflection.

In LED backlight mould group 100 of the present invention, the lens 12 are to melt the glass material with the bottom plate 11 The problems such as melting integral structure made of cooling down after forming, therefore increasing the heat resistance for expanding tabula rasa 10 and slow down aging, So that the performance of the backlight module 100 is more stable.Further, since the bottom surface 121 of the lens 12 is using atomization sandblasting Rough surface made of processing increases the shooting angle of 20 emergent ray of LED light source, reduce the light mixing of LED light source away from From so can reduce the integral thickness of the backlight module 100 guaranteeing original light-out effect simultaneously.

It is understood that for those of ordinary skill in the art, can do in accordance with the technical idea of the present invention Various other changes and modifications out, and all these changes and deformation all should belong to the protection of claim of the invention Range.

Claims

1. a kind of LED backlight mould group, including LED light source and expansion tabula rasa, the expansion tabula rasa is including a bottom plate and is formed in bottom Multiple lens on plate are formed with the accommodating hole for accommodating the LED light source on the bottom plate, it is characterised in that: the expansion tabula rasa For glass material, and the light transmittance of the glass material is 95% or more, and the colo(u)r bias of the glass material is less than or equal to 3/ 1000, the heat resistance of the glass material is more than or equal to 750 degrees Celsius, and the bottom plate and the lens are glass material warp Integral structure made of cooling down is crossed after high temperature melt molding.

2. backlight module as described in claim 1, it is characterised in that: the bottom plate have a first surface and with first table The opposite second surface in face, the accommodating hole are recessed to be formed from the second surface towards the first surface, first table Face is by rough surface made of atomization blasting treatment.

3. backlight module as claimed in claim 2, it is characterised in that: the first surface of the lens from the bottom plate protrudes outward It forms, the lens have bottom surface, the top surface opposite with the bottom surface and the connection being connected with the first surface of the bottom plate The side of the bottom surface and the top surface.

4. backlight module as claimed in claim 3, it is characterised in that: the top surface area of the lens is less than the base area, The top surface of the lens is curved surface.

5. backlight module as claimed in claim 3, it is characterised in that: the cross section of the accommodating hole is trapezoidal, and the accommodating The first surface is gradually increased towards the second apparent bearing without leave in the hole in hole.

6. backlight module as claimed in claim 5, it is characterised in that: the hole positioned at the first surface side of the accommodating hole Diameter is less than the bottom surface cross-sectional width of the lens.

7. backlight module as described in claim 1, it is characterised in that: the LED light source is arranged in a one-to-one correspondence with the lens.

8. backlight module as claimed in claim 3, it is characterised in that: the bottom surface of the lens is rough surface.