CN215340413U

CN215340413U - Ultrathin light guide plate light-emitting module

Info

Publication number: CN215340413U
Application number: CN202120865843.3U
Authority: CN
Inventors: 郑孟弘
Original assignee: Jiangmen Lucky Opto Precision Co ltd
Current assignee: Jiangmen Lucky Opto Precision Co ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-12-28
Anticipated expiration: 2031-04-25

Abstract

The utility model discloses an ultrathin light guide plate light-emitting module, which comprises a backlight plate, a heat dissipation plate, a light guide plate, an FPC (flexible printed circuit) soft plate, an LED chip, a light screen and a diffusion plate group, wherein the heat dissipation plate is laid on the top surface of the backlight plate, the light guide plate is laid on the top surface of the heat dissipation plate, the FPC soft plate is laid on the top surface of the heat dissipation plate and is positioned outside the light guide plate in an aligned mode with the light guide plate, the LED chip is arranged on the FPC soft plate and faces the outside of the FPC soft plate to emit light laterally, the light screen is arranged on the top surface of the FPC soft plate and covers the LED chip and the light-emitting position, and the diffusion plate group is arranged on the top surface of the light guide plate and has three shapes; the backlight plate, the heat dissipation plate, the light guide plate, the FPC soft plate, the light screen and the diffusion plate group are paved and overlapped to form the total thickness of 1-1.3mm, and the thickness of the light guide plate is 0.4 mm; the diffusion plate group comprises a diffusion plate A which is positioned in the center of the light guide plate and is in a ring shape, diffusion plates B which are positioned on two sides of the circular diffusion plate and are symmetrically arranged, and diffusion plates C which are positioned on the upper end and the lower end of the diffusion plate B and are symmetrically arranged.

Description

Ultrathin light guide plate light-emitting module

Technical Field

The utility model relates to the technical field of light-emitting modules, in particular to a light-emitting module of an ultrathin light guide plate.

Background

At present, backlight light-emitting modules applied to ultra-thin advertising light boxes, medical X-ray viewers, flat-plate type lamp decoration illumination, lighting effect application of lighting engineering, light-emitting signs and other occasions need to be thinner and thinner along with the design trend of thinning of LEDs. Especially for consumer electronics display devices, the demand for ultra-thinning is more demanding, and there are two approaches to ultra-thinning of consumer electronics display devices: and thinning the display screen glass and the backlight module. Obviously, the thinning of the backlight module has more advantages in cost and environmental protection than the thinning of glass. In order to obtain better light guiding efficiency, the backlight module needs to use a light guide plate, which is a main component of the backlight module. The backlight module is mainly used for tablet personal computers, electronic readers (electronic books), smart phones, PC keyboards, electronic dictionaries, car navigators, super notebooks, automotive interior lighting light guide films and the like, and generally, the light guide plate in the backlight module needs to be reduced to be less than 0.6 mm. As is known, the main manufacturing means of the light guide plate with medium and small dimensions is a precision injection molding machine, thinning is restricted by an injection molding process, when the light guide plate is thinned to be below 0.6mm, the processing requirement of an injection mold is high, and the light guide plate is easy to warp, yellow and has insufficient resistance; the manufacture of large-size thin light guide plates needs to depend on an imported high-injection-speed injection molding machine, the price of a mold and a machine table is high, the yield is low, and the investment faces a great risk. Therefore, the development of the design and manufacturing technology of the new generation of ultra-thin light guide plate backlight module is an important requirement of the industry.

The ultrathin light guide plate backlight module converts a side light source into a surface light source through the light guide plate and emits light uniformly, so that an ultrathin light emitting effect is achieved, the traditional backlight source is replaced to emit light (a certain thickness is needed, and the thickness is generally 15-20 cm), the problem of limited space is solved, and the ultrathin light guide plate backlight module becomes a novel light emitting backlight source; the thickness of the light guide plate needs to be matched with the side light surface shape and the thickness of an LED, and because the difficulty and the cost of reducing the ultrathin light guide plate to be below 0.6mm in the prior art are high, the design of the light guide plate of 0.8mm PMMA is a preferred scheme for thinning the light guide plate of the backlight source of the all-in-one machine. When the thickness of the light guide plate is 0.8mm, the overall thickness of the whole backlight module inevitably reaches more than 1.5mm, which is not beneficial to the further ultra-thin design of the backlight module, and the basic reason is that the overall thickness of the backlight module cannot be further reduced due to the structure and distribution of other used parts in the backlight module besides the thickness of the light guide plate. Therefore, certain improvement needs to be performed on the ultra-thin backlight module structure with the existing structure so as to meet the development of ultra-thin type.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides an ultrathin light guide plate light-emitting module, which has the overall thickness of only about 1mm, basically consists of a backlight plate, a heat dissipation plate, a light guide plate, a light shading plate and a diffusion plate, all plates are ultrathin in design and are sequentially and tightly attached, the thickness of the light guide plate is only 0.4mm, the thicknesses of other plates are even thinned to 0.1mm, and the formed integral light-emitting module is ultrathin; the surfaces of the backlight plate and the light guide plate are coated with ultrathin black shading films, so that a good light shading effect is formed, and the thickness of the whole light emitting module is not obviously increased; the structure is optimized through reasonable part laying and distribution, unnecessary parts are saved, the thickness of the whole body can be reduced to form an ultra-thin type, and meanwhile, the adopted light guide plate is small in size, and the effect of uniform light emission can be achieved.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a light-emitting module of an ultrathin light guide plate comprises a backlight plate, a heat dissipation plate, a light guide plate, an FPC (flexible printed circuit) soft plate, an LED chip, a light screen and a diffusion plate group, wherein the heat dissipation plate is laid on the top surface of the backlight plate, the light guide plate is laid on the top surface of the heat dissipation plate, the FPC soft plate is laid on the top surface of the heat dissipation plate and is positioned outside the light guide plate in an aligned mode with the light guide plate, the LED chip is arranged on the FPC soft plate and faces the outside of the FPC soft plate to emit light laterally, the light screen is arranged on the top surface of the FPC soft plate and covers the LED chip and the light-emitting position, and the diffusion plate group is arranged on the top surface of the light guide plate and has three shapes; the backlight plate, the heat dissipation plate, the light guide plate, the FPC soft plate, the light screen and the diffusion plate group are paved and overlapped to form the total thickness of 1-1.3mm, and the thickness of the light guide plate is 0.4 mm; the diffusion plate group comprises a diffusion plate A which is positioned in the center of the light guide plate and is in a circular ring shape, diffusion plates B which are positioned on two sides of the circular diffusion plate and are symmetrically arranged, and diffusion plates C which are positioned on the upper end and the lower end of the diffusion plate B and are symmetrically arranged; the backlight plate is provided with a two-dimensional code.

Furthermore, one end of the FPC flexible board extends to form a bending section which is not covered by the shading plate and is led out from the light guide plate, one end of the bending section is provided with release paper A, and the other end of the bending section is provided with release paper B.

Furthermore, the release paper A covers the PAD position arranged at the end part of the bending section.

Furthermore, the top surface of the outermost end extending out of the bending section is provided with a pin.

Furthermore, the bottom surface of the outermost end extending out of the bending section is provided with a white line mark corresponding to the pin.

Furthermore, the release paper A is pasted on the PAD position through conductive adhesive, the release paper B is pasted on the bending section through polyester adhesive, and the release paper A and the release paper B are both blue.

Furthermore, the diffusion plate B is provided with four side surfaces, wherein the side surface facing the diffusion plate A is arc-shaped, the side surface at the outermost end is planar, and two side surfaces between the arc-shaped side surface and the planar side surface are isosceles planes arranged in an isosceles shape; the diffusion plate C is obliquely arranged outwards to form a triangle, and the bottom side surface of the diffusion plate C is parallel to the isosceles plane corresponding to the side surface.

Furthermore, the four corners of the heat dissipation plate are provided with heat dissipation plate mounting holes, the FPC soft board is provided with FPC soft board mounting holes corresponding to the two heat dissipation plate mounting holes on the same side, and the conduit plate is provided with light guide plate mounting holes corresponding to the two heat dissipation plate mounting holes on the other same side.

Furthermore, the thickness of the bending section of the FPC soft board is 0.1mm, the bending section is provided with a plurality of bend settings, and the width of the bend of the bending section is 2.5 mm.

Furthermore, the backlight plate and the light guide plate are both PC, and shading black glue films are arranged on the outward surfaces of the backlight plate and the light guide plate.

In summary, the overall thickness of the ultrathin light guide plate light-emitting module is only about 1mm, the overall thickness of the ultrathin light guide plate light-emitting module is basically composed of a backlight plate, a heat dissipation plate, a light guide plate, a light shading plate and a diffusion plate, all plates are of ultrathin design and are sequentially and tightly attached, the thickness of the light guide plate is only 0.4mm, the thicknesses of other plates are even reduced to 0.1mm, and the thickness of the formed overall light-emitting module is ultrathin; the surfaces of the backlight plate and the light guide plate are coated with ultrathin black shading films, so that a good light shading effect is formed, and the thickness of the whole light emitting module is not obviously increased; the structure is optimized through reasonable part laying and distribution, unnecessary parts are saved, the thickness of the whole body can be reduced to form an ultra-thin type, and meanwhile, the adopted light guide plate is small in size, and the effect of uniform light emission can be achieved.

Drawings

FIG. 1 is a schematic front view of an ultra-thin light guide plate light emitting module according to example 1 of the present invention;

FIG. 2 is a schematic backside view of an ultra-thin light guide plate light emitting module according to example 1 of the present invention;

FIG. 3 is an exploded schematic view of an ultra-thin light guide plate light-emitting module without cutting the backlight plate;

FIG. 4 is an exploded schematic view of another direction of the ultrathin light guide plate light-emitting module without cutting the backlight plate.

Detailed Description

Example 1

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the ultra-thin light guide plate light-emitting module described in this embodiment 1 includes a backlight plate 1, a heat dissipation plate 2 laid on the top surface of the backlight plate, a light guide plate 3 laid on the top surface of the heat dissipation plate, an FPC flexible board 4 laid on the top surface of the heat dissipation plate and aligned with the light guide plate and located outside the light guide plate, an LED chip 5 disposed on the FPC flexible board and facing the outside of the FPC flexible board for side light emission, a light shielding plate 6 disposed on the top surface of the FPC flexible board for covering the LED chip and the light-emitting position, and a diffusion plate group 7 disposed on the top surface of the light guide plate and having three shapes; the backlight plate, the heat dissipation plate, the light guide plate, the FPC soft plate, the light screen and the diffusion plate group are paved and overlapped to form the total thickness of 1-1.3mm, and the thickness of the light guide plate is 0.4 mm; the diffusion plate group comprises a diffusion plate A8 which is positioned in the center of the light guide plate and is in a circular ring shape, diffusion plates B9 which are positioned on two sides of the circular diffusion plate and are symmetrically arranged, and diffusion plates C10 which are positioned at the upper end and the lower end of the diffusion plate B and are symmetrically arranged; the backlight plate is provided with a two-dimensional code 11.

In this embodiment, a bending section 12 that is not covered by the light shielding plate and is led out from the light guide plate extends from one end of the FPC flexible board, and a release paper a13 is disposed at one end of the bending section, and a release paper B14 is disposed at the other end of the bending section. When the backlight plate is not cut, a long-strip backlight plate 21 corresponding to the design of the bent section is extended from the square backlight plate and the tail of the square backlight plate, a small convex bulge 22 is reserved on the outer side of the square backlight plate, after the square backlight plate is cut, only the square backlight plate is reserved, and the long-strip backlight plate and the bulge are cut off.

In this embodiment, the release paper a covers the PAD site 15 disposed at the end of the bending section.

In this embodiment, the top surface of the outermost end of the bent section extending from the bent section is provided with a pin 16.

In this embodiment, the bottom surface of the outermost end extending from the bending section is provided with a white line mark 17 corresponding to the lead.

In this embodiment, the release paper a is attached to the PAD with a conductive adhesive, the release paper B is attached to the bending section with a polyester adhesive, and both the release paper a and the release paper B are blue.

In this embodiment, the diffuser plate B is provided with four side surfaces, wherein the side surface facing the diffuser plate a is arc-shaped, the side surface at the outermost end is planar, and two side surfaces between the arc-shaped side surface and the planar side surface are isosceles planes; the diffusion plate C is obliquely arranged outwards to form a triangle, and the bottom side surface of the diffusion plate C is parallel to the isosceles plane corresponding to the side surface.

In this embodiment, the four corners of the heat dissipating plate are provided with heat dissipating plate mounting holes 18, the FPC flexible printed circuit board is provided with FPC flexible printed circuit board mounting holes 19 corresponding to the two heat dissipating plate mounting holes on the same side, and the duct board is provided with light guiding plate mounting holes 20 corresponding to the two heat dissipating plate mounting holes on the other same side.

In this embodiment, the thickness of the bending section of the FPC flexible printed circuit is 0.1mm, the bending section is provided with a plurality of bends, and the width of the bend of the bending section is 2.5 mm.

In this embodiment, the backlight and the light guide plate are both PC, and the outward surfaces of the backlight and the light guide plate are both provided with black shading adhesive films. The shading black glue film is used for covering the backlight plate and other positions of the light guide plate to transmit light, the light only transmits from the diffusion plate A, the diffusion plate B and the diffusion plate C to form a unique pattern effect, and the shading black glue film does not cover the surfaces of the diffusion plate A, the diffusion plate B and the diffusion plate C.

The whole thickness of the ultrathin light guide plate light-emitting module is only about 1mm, the whole thickness of the ultrathin light guide plate light-emitting module is basically composed of a backlight plate, a heat dissipation plate, a light guide plate, a light screen and a diffusion plate, all plates are in ultrathin design and are sequentially and tightly attached, the thickness of the light guide plate is only 0.4mm, the thicknesses of other plates are even thinned to 0.1mm, and the thickness of the formed whole light-emitting module is ultrathin; the surfaces of the backlight plate and the light guide plate are coated with ultrathin black shading films, so that a good light shading effect is formed, and the thickness of the whole light emitting module is not obviously increased; the structure is optimized through reasonable part laying and distribution, unnecessary parts are saved, the thickness of the whole body can be reduced to form an ultra-thin type, and meanwhile, the adopted light guide plate is small in size, and the effect of uniform light emission can be achieved.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A light-emitting module of an ultrathin light guide plate is characterized by comprising a backlight plate, a heat dissipation plate, a light guide plate, an FPC (flexible printed circuit) soft plate, an LED chip, a light screen and a diffusion plate group, wherein the heat dissipation plate is laid on the top surface of the backlight plate, the light guide plate is laid on the top surface of the heat dissipation plate, the FPC soft plate is laid on the top surface of the heat dissipation plate and is positioned outside the light guide plate in an aligned mode with the light guide plate, the LED chip is arranged on the FPC soft plate and faces the outside of the FPC soft plate to emit light laterally, the light screen is arranged on the top surface of the FPC soft plate and covers the LED chip and the light-emitting position, and the diffusion plate group is arranged on the top surface of the light guide plate and has three shapes; the backlight plate, the heat dissipation plate, the light guide plate, the FPC soft plate, the light screen and the diffusion plate group are paved and overlapped to form the total thickness of 1-1.3mm, and the thickness of the light guide plate is 0.4 mm; the diffusion plate group comprises a diffusion plate A which is positioned in the center of the light guide plate and is in a circular ring shape, diffusion plates B which are positioned on two sides of the circular diffusion plate and are symmetrically arranged, and diffusion plates C which are positioned on the upper end and the lower end of the diffusion plate B and are symmetrically arranged; the backlight plate is provided with a two-dimensional code.

2. The ultra-thin light guide plate lighting module as claimed in claim 1, wherein a bending section extending from one end of the FPC is not covered by the light shielding plate and is led out from the light guide plate, and a release paper A is disposed at one end of the bending section and a release paper B is disposed at the other end of the bending section.

3. The ultra-thin light guide plate lighting module as claimed in claim 2, wherein the release paper a covers a PAD disposed at an end of the curved section.

4. The ultra-thin light guide plate lighting module as claimed in claim 3, wherein the top surface of the outermost end of the curved section extending out is provided with a lead.

5. The ultra-thin light guide plate lighting module as claimed in claim 4, wherein the bottom surface of the outermost end of the curved section extending out is provided with a white line mark corresponding to the lead.

6. The ultra-thin light guide plate light-emitting module as claimed in claim 5, wherein the release paper A is attached to the PAD position by conductive adhesive, the release paper B is attached to the curved section by polyester adhesive, and both the release paper A and the release paper B are blue.

7. The ultra-thin light guide plate lighting module as claimed in claim 6, wherein the diffuser plate B has four sides, wherein the side facing the diffuser plate A is arc-shaped, the outermost side is planar, and two sides between the arc-shaped side and the planar side are isosceles planes; the diffusion plate C is obliquely arranged outwards to form a triangle, and the bottom side surface of the diffusion plate C is parallel to the isosceles plane corresponding to the side surface.

8. The ultra-thin light guide plate lighting module as claimed in claim 7, wherein the heat dissipation plate has heat dissipation plate mounting holes at four corners, the FPC board has FPC board mounting holes corresponding to the two heat dissipation plate mounting holes on the same side, and the duct board has light guide plate mounting holes corresponding to the two heat dissipation plate mounting holes on the other same side.

9. The ultra-thin light guide plate lighting module as claimed in claim 8, wherein the thickness of the bending section of the FPC is 0.1mm, the bending section is provided with a plurality of curved grooves, and the width of the curved groove of the bending section is 2.5 mm.

10. The ultra-thin light guide plate lighting module as claimed in claim 9, wherein the backlight plate and the light guide plate are both made of PC, and the light-shielding black glue film is disposed on the outward surfaces of the backlight plate and the light guide plate.