CN205427225U

CN205427225U - A low-power side-entry backlight module and its liquid crystal display

Info

Publication number: CN205427225U
Application number: CN201521050765.2U
Authority: CN
Inventors: 林明枢
Original assignee: Guangdong Xingyaxing Semiconductor Co ltd
Current assignee: Guangdong Xingyaxing Semiconductor Co ltd
Priority date: 2015-12-16
Filing date: 2015-12-16
Publication date: 2016-08-03
Anticipated expiration: 2025-12-16

Abstract

The utility model relates to a computer peripheral technical field, specifically speaking relates to a formula backlight unit is gone into to side of low-power consumption and liquid crystal display thereof. The lateral-entering type backlight module comprises a light guide plate and an LED module positioned on one side of the light guide plate, the LED module comprises a PCB and an LED arranged on the PCB, a reflective film is plated on the surface of the PCB, a light incident surface of the light guide plate is provided with a light groove corresponding to the LED, and the LED extends into the light groove; one end of the light groove close to the LED is provided with a divergent lens. The utility model discloses a design light groove effectively utilizes the light source, improves light utilization ratio to improve energy utilization ratio, reduce the consumption.

Description

The side entrance back module of a kind of low-power consumption and LCDs thereof

Technical field

This utility model relates to computer peripheral technical field, specifically, relates to side entrance back module and the LCDs thereof of a kind of low-power consumption.

Background technology

Along with the development of science and technology, the technology of LCDs is more and more higher, computer screen from before CRT be changed into present LCDs, itself is the most luminous for LCDs, but passively luminous；So needing backlight module to provide light source, LCDs can be divided into CCFL backlight module and LED-backlit module from the classification of light source, owing to LED has energy-conservation, the feature of length in service life, current most LCDs all have employed LED-backlit module, and in LED-backlit module, it is divided into straight-down negative and side-light type according to the position of LED；Owing to side-light type can reduce the thickness of display screen, the most mostly using the LED-backlit module of side-light type, sidelight type backlight module is poor on light utilizes, and in order to make up this defect, it is relatively big that the power of LED-backlit module is typically arranged, thus causes power consumption bigger；And at present smart mobile phone in use, electricity major part is used in luminescence, it is therefore desirable to design a LCDs that can reduce LED-backlit power, saves electric energy.

Summary of the invention

The purpose of this utility model is to solve the deficiencies in the prior art, it is provided that the side entrance back module of a kind of low-power consumption, and this side entrance back module can effectively utilize light source, reduces power consumption.

Another object of the present utility model is: provide the LCDs of a kind of low-power consumption, saves the energy.

For reaching above-mentioned purpose, the technical solution adopted in the utility model is:

A kind of side entrance back module of low-power consumption, including light guide plate and the LED module that is positioned at light guide plate side, described LED module includes pcb board and is installed on the LED of pcb board, and the surface of described pcb board is coated with reflective membrane, the incidence surface of light guide plate is provided with the light groove corresponding with LED, and LED stretches into light groove；Light groove is provided with divergent lens near one end of LED.

Further, the cross-sectional area of described smooth groove is gradually reduced to the one end away from LED from the one end near LED.

Further, tapered of light groove setting.

Further, the bottom surface of light groove is coated with diffuse-reflectance reflective membrane.

Further, the light side that goes out of light guide plate is sequentially provided with diffusion sheet and prism film group, wherein prism module includes the first prism film and the second prism film, the exiting surface of the first prism film and the second prism film is respectively equipped with a plurality of parallel projection, and the protruding extending direction of the first prism film is vertical with the protruding extending direction of the second prism film.

A kind of LCDs, including liquid crystal display screen, glass screen and above-mentioned side entrance back module；Glass screen is externally provided with condensing film.

What this utility model obtained has the beneficial effect that this utility model effectively utilizes light source by design light groove, improves light utilization, thus improves energy utilization rate, reduces power consumption.

Accompanying drawing explanation

Fig. 1 is a kind of STRUCTURE DECOMPOSITION schematic diagram of this utility model backlight module.

Fig. 2 is a kind of structural representation of this utility model LCDs.

Reference is:

1 pcb board 2 LED

3 reflective membrane 4 divergent lenses

5 smooth groove 6 light guide plates

7 diffusion sheet 8 first prism films

9 second prism films 10 are protruding

11 liquid crystal display screen 12 glass screens

13 condensing films.

Detailed description of the invention

Below in conjunction with the accompanying drawings 1, Fig. 2, and this utility model is described further by detailed description of the invention.

Embodiment 1: see Fig. 1.

A kind of side entrance back module of low-power consumption, including light guide plate 6 and the LED module that is positioned at light guide plate 6 side, described LED module includes pcb board 1 and is installed on the LED2 of pcb board 1, the surface of described pcb board 1 is coated with reflective membrane 3, the incidence surface of light guide plate 6 is provided with the light groove 5 corresponding with LED2, and LED2 stretches into light groove 5；Light groove 5 is provided with divergent lens 4 near one end of LED2.

The power of LED side entrance back module is relatively big at present, essentially consists in light utilization the highest, and the technical program solves for this problem, and LED light source is generally point source, and the luminous characteristics of point source is that lighting angle is big, needs to avoid light leakage phenomena；Therefore light groove 5 end in the technical program can avoid light to leak with capacity LED2, secondly, light is when entering light guide plate 6, need to be diffused into from the incidence surface side of light guide plate 6 with incidence surface relative to opposite side, light has part to be consumed in communication process, should reduce consumption；Therefore light groove 5 can effective reducing effect, light is traveled to opposite side.So that light is the most uniform in light guide plate 6, the end of light groove 5 arranges divergent lens 4, it is to avoid form dark space between adjacent light groove 5.Divergent lens 4 can be concavees lens.The compound lens that light is launched can certainly be used.

Further, the cross-sectional area of described smooth groove 5 is gradually reduced to the one end away from LED2 from the one end near LED2.

Light, in projection process, needs to be evenly distributed in light guide plate 6, therefore except the transverse projection on horizontal plane, in addition it is also necessary to project in the vertical；Light groove 5 is designed to tapered shape, beneficially light longitudinal propagation.

Further, tapered of light groove 5 setting.

Light groove 5 is designed as taper platform, and effect is preferable.Truncated cone shape can certainly be designed to.

Further, the bottom surface of light groove 5 is coated with diffuse-reflectance reflective membrane (being not drawn in figure).

In order to provide light utilization further, as far as possible by the exiting surface side of light source projects to light guide plate 6, therefore the bottom surface at light groove 5 is coated with diffuse-reflectance reflective membrane, naturally it is also possible to arrange diffuse-reflectance reflecting piece；After carrying out diffuse-reflectance so that the light projecting bottom surface reflex to light guide plate 6 the most uniformly go out light side.So can avoid arranging reflection site and reflector plate at the shady face of light guide plate 6.

Further, the light side that goes out of light guide plate 6 is sequentially provided with diffusion sheet 7 and prism film group, wherein prism module includes the first prism film 8 and the second prism film 9, first prism film 8 is respectively equipped with a plurality of parallel projection 10 with the exiting surface of the second prism film 9, and projection 10 extending direction of the first prism film 8 is vertical with projection 10 extending direction of the second prism film 9.

Diffusion sheet 7 is set, is the equalizing light rays that will project from light guide plate 6；Secondly prism module from both direction by light optically focused so that radiation direction, near axis direction, improves light utilization.

Embodiment 2: seeing Fig. 2, a kind of LCDs, including liquid crystal display screen 11, glass screen 12 and above-mentioned side entrance back module；Glass screen 12 is externally provided with condensing film 13.

It is relatively big, therefore when light projects, it is not necessary to the carrying out of wide-angle projects that the size of current LCDs is generally designed；Condensing film 13 is used to be changed by light crevice projection angle；Such that it is able to attenuating amount of light, auxiliary reduces power consumption.

Below being only the preferred embodiment of the application, equivalent technical solutions on this basis still falls within application protection domain.

Claims

1. A side-entry backlight module with low power consumption, comprising a light guide plate and an LED module positioned on one side of the light guide plate, the LED module includes a PCB board and LEDs mounted on the PCB board, the PCB board The surface is coated with a reflective film, and the feature is that: the light incident surface of the light guide plate is provided with a light groove corresponding to the LED, and the LED extends into the light groove; the end of the light groove close to the LED is provided with a diverging lens.

2 . The low power consumption side-type backlight module according to claim 1 , wherein the cross-sectional area of the light groove gradually decreases from an end close to the LED to an end far away from the LED.

3. A low power consumption side-type backlight module according to claim 2, characterized in that: the light groove is arranged in the shape of a tapered platform.

4. A low power consumption side-type backlight module according to claim 3, characterized in that: the bottom surface of the light groove is coated with a diffuse reflective film.

5. A low-power side-entry backlight module according to claim 1, wherein the light-emitting side of the light guide plate is provided with a diffusion sheet and a prism film group in sequence, wherein the prism module includes a first prism The film and the second prism film, the light exit surfaces of the first prism film and the second prism film are respectively provided with a plurality of parallel protrusions, and the extension direction of the protrusions of the first prism film is perpendicular to the extension direction of the protrusions of the second prism film.

6. A liquid crystal display, characterized in that it comprises a liquid crystal screen, a glass screen, and the side-entry backlight module as claimed in any one of claims 1 to 5; a light-condensing film is provided outside the glass screen.