CN201437935U

CN201437935U - LCD backlight module and LED backlight source

Info

Publication number: CN201437935U
Application number: CN2009201104835U
Authority: CN
Inventors: 尹大根; 崔来友; 布占场; 康方
Original assignee: Beijing BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Optoelectronics Technology Co Ltd
Priority date: 2009-08-04
Filing date: 2009-08-04
Publication date: 2010-04-14
Anticipated expiration: 2019-08-04

Abstract

The utility model discloses an LCD backlight module and an LED backlight source. The LED backlight source comprises a substrate and a plurality of LEDs and is characterized in that the substrate comprises a first surface which forms at least one first bump, and the LEDs are arranged on the first bump. In the utility model, the bump is arranged on the substrate, so that the light of the LEDs is dispersed, the light concentration in a light guide plate is avoided, and the problem of uneven gray of the backlight module is improved.

Description

LCD backlight module and LED-backlit source

Technical field

The utility model relates to LCD, especially relates to the LCD backlight module and the LED-backlit source of the uniform gray level that can make emergent light.

Background technology

LCD is a kind of non-self-emission display apparatus, and therefore module backlight need be set provides light source, according to the position difference of light source in the module backlight, can be divided into side-light type module backlight and down straight aphototropism mode set.Because side-light type module backlight is more conducive to lightening design, therefore extensively adopt side-light type module backlight to make LCD in the industry.In the module backlight usually with cold-cathode fluorescence lamp (CCFL) or light emitting diode (LED) array as light source.Led light source is compared CCFL and is had plurality of advantages such as easy control, low-voltage direct drive, combination back color representation is abundant, and the life-span is long.

Fig. 5 is the exploded perspective view of existing LCD backlight module.As shown in Figure 5, existing LCD backlight module comprises: underframe 1, reflecting plate 2, LGP 3, LED-backlit source 4, optical thin film 5 and upper frame 6.Wherein, upper frame 6 underframes 1 are combined to form complete framework; Underframe 1 is the rectangular structure of an opening, comprises base plate and four sidewalls; The base plate top is provided with reflecting plate 2; Reflecting plate 2 tops are provided with LGP 3; The one or both sides of LGP 3 are provided with LED-backlit source 4; LED-backlit source 4 is sticked on the sidewall of underframe, and two LED-backlit sources 4 are set usually symmetrically; The top of LGP 3 is provided with optical thin film 5, and optical thin film 5 is a multi-layer film structure; The top of optical thin film 5 is covered with upper frame 6.

Fig. 6 is the vertical view of existing module backlight.As shown in Figure 6, existing LED-backlit source 4 comprises plane substrate 40 and is arranged at a plurality of LED41 on the substrate 40.But because the light of LED41 has higher linearity, the light that penetrates in LGP 3 exists the problem of gray scale inequality as shown in Figure 6 to take place, and promptly the Reference numeral of both sides is that 31 zone is comparatively dim, and the middle part is bright than both sides.This phenomenon produces harmful effect to the display quality of LCD.

The utility model content

The purpose of this utility model provides a kind of LCD backlight module and LED-backlit source, can make the uniform gray level of module backlight to improve the LCD display quality.

For achieving the above object, the utility model provides a kind of LED-backlit source, comprises substrate and a plurality of LED, and described substrate comprises first, and described first forms at least one first projection, and described LED is arranged on described first projection.

For achieving the above object, the utility model also provides a kind of LCD backlight module, comprising:

Underframe, it is the rectangular structure of an opening, comprises base plate and four sidewalls;

LGP is positioned at the top of the described base plate of underframe;

The LED-backlit source comprises substrate and a plurality of LED, and described substrate comprises first and second, be formed with at least one first projection on described first, described LED is arranged on described first projection, and towards LGP, described second face is fixed on the described sidewall.

LGP is positioned at the top of the described base plate of described underframe;

Be formed with at least one second projection towards LGP on the sidewall of in described four sidewalls or a pair of symmetry;

The LED-backlit source comprises substrate and is formed at a plurality of LED on the substrate that described flexible base, board is attached on the sidewall that is formed with described second projection.

As shown from the above technical solution, the utility model LCD backlight module and LED-backlit source have following beneficial effect:

1, LCD backlight module of the present utility model and LED-backlit source by projection is set, with the light dispersion of LED, prevent that the light in LGP from concentrating on substrate, improved the problem of module gray scale inequality backlight.

2, module backlight of the present utility model by projection is set on underframe, is sticked the LED-backlit source on underframe, when improving the problem of gray scale inequality with this, has simplified manufacturing, saves cost.

Description of drawings

Fig. 1 is the vertical view of the utility model LED-backlit source first embodiment;

Fig. 2 is the vertical view of the utility model LED-backlit source second embodiment;

Fig. 3 is the cutaway view of the utility model LCD backlight module first embodiment;

Fig. 4 is the cutaway view of the utility model LCD backlight module second embodiment;

Fig. 5 is the exploded perspective view of existing LCD backlight module;

Fig. 6 is the vertical view of existing module backlight.

The specific embodiment

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

Fig. 1 is the vertical view of the utility model LED-backlit source first embodiment.As shown in Figure 1, LED-backlit of the present utility model source, luminous towards LGP 3, the LED-backlit source comprises substrate 40 and a plurality of LED41, substrate 40 comprises first 401 and second 402, convex to form one first projection 42 to LGP 3 for first 401 on 3, the first 401 of LGPs, LED41 is arranged on first projection 42.In the present embodiment, the middle part of substrate 40, only having formed one first projection, 42, the first projections 42 is isosceles triangle, its base angle θ is preferably the 5-10 degree.So, the light-struck dispersion more of LED in the middle part of also can be more even, can not producing, can be concentrated the light that LGP penetrates, the phenomenon that both sides are sparse, and then improve the uneven problem of gray scale.

Fig. 2 is the vertical view of the utility model LED-backlit source second embodiment.As shown in Figure 2, LED-backlit of the present utility model source, luminous towards LGP 3, the LED-backlit source comprises substrate 40 and a plurality of LED41, substrate 40 comprises first 401 and second 402, convex to form a plurality of first projections 42 towards 3, the first 401 of LGPs to LGP 3 for first 401, LED41 is arranged at respectively on a plurality of first projections 42.In the present embodiment, formed seven first projections 42 on the substrate 40, each first projection 42 is an isosceles triangle, and its base angle θ is preferably the 5-10 degree.So, the light-struck dispersion more of LED in the middle part of also can be more even, can not producing, can be concentrated the light that LGP penetrates, the phenomenon that both sides are sparse, and then improve the uneven problem of gray scale.

What deserves to be mentioned is that as long as first projection can exhale the light that superincumbent LED is set, its shape is not done particular determination, can set arbitrarily on request, and each first projection all can be inequality.But consider for the LED convenience is installed, be preferably non-curved surface projection.

Fig. 3 is the cutaway view of the utility model LCD backlight module first embodiment.As shown in Figure 3, the LCD backlight module of present embodiment comprises underframe, LGP 3 and LED-backlit source 4; Underframe is the rectangular structure of an opening, comprises base plate 10 and four sidewalls 11; The inside of underframe is provided with LGP 3; The one or both sides of LGP 3 are provided with the LED-backlit source symmetrically; LED-backlit source 4 comprises substrate 40 and a plurality of LED41, and substrate 40 comprises and be formed with at least one first projection 42 on first 401 and second 402, the first 401, and LED41 is arranged on described first projection 42, and second 402 is fixed on the described sidewall 11.

In the present embodiment, the middle part of substrate 40, only having formed one first projection, 42, the first projections 42 is isosceles triangle, its base angle θ is preferably the 5-10 degree.So, the light-struck dispersion more of LED in the middle part of also can be more even, can not producing, can be concentrated the light that LGP penetrates, the phenomenon that both sides are sparse, and then improve the uneven problem of gray scale.

Fig. 4 is the cutaway view of the utility model LCD backlight module second embodiment.As shown in Figure 4, the LCD backlight module of present embodiment comprises underframe, LGP 3 and LED-backlit source; Underframe is the rectangular structure of an opening, comprises that the direction towards LGP 3 convexes to form at least one second projection 12 on the sidewall 11 of in base plate 10 and 11, four sidewalls 11 of four sidewalls or a pair of symmetry; The inside of underframe is provided with LGP 3; The sidewall 11 that is formed with second projection 12 is provided with the LED-backlit source; The LED-backlit source comprises substrate 40 ' and is formed at a plurality of LED41 on the substrate 40 ', and substrate 40 ' is attached on the described sidewall that is formed with second projection 12.Substrate 40 ' can be the flexible base, board that flexible material is made, and at this moment, can directly be attached on second projection 12 and gets final product.In addition, substrate 40 ' can also be made and second projection, 12 mutual adaptive shapes in advance, is being attached on second projection 12.

In the present embodiment, the middle part of sidewall 11, only having formed one second projection, 12, the second projections 12 is isosceles triangle, its base angle θ is preferably the 5-10 degree.Because underframe is a metal, the substrate that makes improvements comparison LED-backlit source improves easily a lot, so present embodiment is made simply the cost-saving than above-mentioned first embodiment.

It should be noted that at last: above embodiment is only in order to explanation the technical solution of the utility model but not limit it, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement the technical solution of the utility model, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solutions of the utility model.

Claims

1. a LED-backlit source comprises substrate and a plurality of LED, it is characterized in that, described substrate comprises first, and described first forms at least one first projection, and described LED is arranged on described first projection.

2. LED-backlit according to claim 1 source is characterized in that, described first projection is an isosceles triangle, and the base angle is the 5-10 degree.

3. LED-backlit according to claim 1 source is characterized in that described first projection is positioned at the middle part of substrate at least.

4. a LCD backlight module is characterized in that, comprising:

LGP is positioned at the top of the described base plate of underframe;

5. LCD backlight module according to claim 4 is characterized in that, described first projection is an isosceles triangle, and the base angle is the 5-10 degree.

6. LCD backlight module according to claim 4 is characterized in that described first projection is positioned at the middle part of substrate at least.

7. a LCD backlight module is characterized in that, comprising:

8. LCD backlight module according to claim 7 is characterized in that, described second projection is an isosceles triangle, and the base angle is the 5-10 degree.

9. LCD backlight module according to claim 7 is characterized in that described second projection is positioned at the middle part of sidewall at least.

10. LCD backlight module according to claim 7 is characterized in that, described substrate is a flexible base, board.

11. LCD backlight module according to claim 7 is characterized in that, described substrate and described second projection are adaptive mutually.