CN203385964U

CN203385964U - Bottom-lighting liquid crystal display screen with light-emitting diode (LED) backlight

Info

Publication number: CN203385964U
Application number: CN201320351489.8U
Authority: CN
Inventors: 李宏岱
Original assignee: Irico Group Corp
Current assignee: Irico Group Corp
Priority date: 2013-06-19
Filing date: 2013-06-19
Publication date: 2014-01-08
Anticipated expiration: 2023-06-19

Abstract

The utility model provides a bottom-lighting liquid crystal display screen with a light-emitting diode (LED) backlight. The screen is high in display evenness and capable of removing the dark area on the periphery. The display screen comprises a solid outer frame, a liquid crystal panel, a backlight module and the LED backlight. The LED backlight comprises inner LEDs distributed in a matrix in a corresponding area of the liquid crystal panel and outer LEDs distributed along the liquid crystal panel in a circle from a center point. The outer LEDs and the inner LEDs are distributed in the matrix. Due to the fact that a circle of outer LEDs are arranged on the periphery of the inner LEDs arranged in the matrix, the dark area on the periphery is subjected to light intensity distribution supplementation, the liquid crystal panel can display identical brightness on the periphery and in the middle, no dark area can exist on the periphery of a liquid crystal display, display evenness is achieved completely, and the evenness can reach over 90%. The display screen is reasonable in design, simple in structure, low in cost, obvious in effect, wide in application range and high in popularization value.

Description

A kind of LCDs of direct-light type LED backlight

Technical field

The utility model relates to arrangement and the distributed architecture of the LED-backlit that liquid crystal display uses, and is specifically related to a kind of LCDs of direct-light type LED backlight.

Background technology

Liquid crystal be a kind of between solid-state and liquid between material, be the organic compound with systematicness molecules align, if can present its heating the liquid condition of transparence, its cooling muddy solid state that there will be crystalline particle.Just because of its this specific character, so be referred to as liquid crystal.Liquid crystal display is exactly to add voltage in the liquid crystal between two glass, by molecules align, changes and tortuous the variation reproduces picture, and screen is by the collision of electronic population, manufactures picture and the perspective by extraneous light reflects to form picture.But because liquid crystal must could be luminous by extra light source, so liquid crystal display backlight just become indispensable ingredient, adopting LED to do structure backlight has two kinds of side entering type and straight-down negatives usually.

At present, large-size direct down liquid crystal display generally has a problem, especially LCD TV, due to arranging of LED-backlit, the uniformity consistency index that makes its demonstration is not very high always, some domestic television producer homogeneitys only have 70% left and right, are mainly to see TV at night, also can feel the slightly dark sight of bright surrounding in the middle of screen in the details in a play not acted out on stage, but told through dialogues situation.In prior art, referring to Fig. 1 and Fig. 2, arranging of LED is all the opposed area that all is positioned at the inboard of liquid crystal board, and the interior edge of entity housing and the outer of liquid crystal board overlap, therefore, along with distance L ED perpendicular line is more and more far away, it is just more severe that brightness descends, and causes the brightness on limit minimum, makes the light intensity of surrounding lower than the light intensity of middle section, inevitable dark space appears, so can be clearly when seeing the details in a play not acted out on stage, but told through dialogues picture.

The utility model content

The technical matters that the utility model solves is to provide a kind of LCDs of direct-light type LED backlight, and show uniformity is high, can eliminate the surrounding dark space.

The utility model is to be achieved through the following technical solutions:

A kind of LCDs of direct-light type LED backlight, is characterized in that, comprises entity housing (3), liquid crystal board, backlight module and LED-backlit; Described LED-backlit comprises that inside, liquid crystal board corresponding region is the inside LED that matrix form is arranged, and central point arranges the external LED of a week along the liquid crystal board edge, and external LED and inner LED also are the matrix form arrangement.

Preferably, described inner LED and the external LED distance on horizontal or vertical direction and between adjacent LED is L, and it meets and concerns tan (α/2)=L/M, the lighting angle that wherein α is LED, and M is the distance of LED to the backlight module plane.

Preferably, the lighting angle α of described LED is 120 °.

Preferably, described entity housing inside edge overlaps setting with the outer edge of liquid crystal board.

Compared with prior art, the utlity model has following useful technique effect:

By the LED periphery, inside being the matrix arrangement, one Zhou Yuqi is set and also is the external LED that matrix is arranged, for the dark space of surrounding being carried out to supplementing of light distribution, the band of position that makes the band of position of liquid crystal board in edge and mediate can demonstrate equal brightness, make the liquid crystal display surrounding not there will be dark space, although the luminous flux in edge zone has certain loss, but thoroughly solved the problem of show uniformity, made homogeneity can reach more than 90%; Reasonable in design, simple in structure, with low cost, successful, wide accommodation, promotional value is high.

The accompanying drawing explanation

The planimetric map of arranging that Fig. 1 is LED-backlit in prior art.

The detail view of arranging that Fig. 2 is LED-backlit in prior art.

Fig. 3 is the planimetric map of arranging of the LED-backlit described in the utility model.

Fig. 4 is the entity skeleton view of arranging of the LED-backlit described in the utility model.

Fig. 5 is the detail view of arranging of the LED-backlit described in the utility model.

In figure: 1 is backlight module, and 2 is liquid crystal board, and 3 is the entity housing, and 4 is external LED.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail:

In order to solve the problems of the prior art of mentioning in background technology, adopt the edge compensation way to solve the surrounding dark space.Concrete is that as shown in Fig. 3, Fig. 4 and Fig. 5, the utility model comprises entity housing 3, liquid crystal board 2 backlight module 1 and LED-backlit; Described LED-backlit comprises that liquid crystal board 2 inside, corresponding region are the inside LED that matrix form is arranged, and central point arranges the external LED 4 of a week along liquid crystal board 2 edges, and external LED 4 also is matrix form with inner LED and arranges; Thereby eliminated the dark space of surrounding, made the light intensity in liquid crystal board 2 scopes even, greatly improved the homogeneity of its demonstration.As shown in Figure 3 and Figure 4, adopt above-mentioned edge compensation way to solve the surrounding dark space, it is almost consistent making the brightness on whole liquid crystal board 2, although luminous flux has some losses, but main loss is the luminous flux of external LED 4, can ignore to this, but eliminate thoroughly dark space, guarantee the homogeneity of inside and outside demonstration.

Along with distance L ED Surface Vertical center line more and more far is progressively decay, therefore to guarantee that the light intensity between two LED projects the consistance on the module plane due to the light intensity of LED in LED-backlit, can further improve the homogeneity while showing; Optimize, as shown in Figure 5, external LED 4 and the inner LED distance between adjacent LED on horizontal or vertical direction is L, and it meets and concerns tan (α/2)=L/M, the lighting angle that wherein α is LED, and M is the distance of LED to backlight module plane 1; When arranging of LED-backlit meets above-mentioned the relation, guaranteed the consistance of its light intensity projection, improved greatly the homogeneity shown.Concrete, as shown in Figure 5, the lighting angle α of LED of take describes as 120 ° as example, i.e. tan60 °=L/M.Wherein, as shown in Figure 4, the interior edge of entity housing 3 and the outer of liquid crystal board 2 overlap and arrange, and have also guaranteed maximum luminous flux and good display effect.

Claims

1. the LCDs of a direct-light type LED backlight, is characterized in that, comprises entity housing (3), liquid crystal board (2), backlight module (1) and LED-backlit; Described LED-backlit comprises that liquid crystal board (2) inside, corresponding region is the inside LED that matrix form is arranged, and central point arranges the external LED (4) of a week along liquid crystal board (2) edge, and external LED (4) also is matrix form with inner LED and arranges.

2. the LCDs of direct-light type LED backlight according to claim 1, it is characterized in that, described inner LED and external LED (4) distance on horizontal or vertical direction and between adjacent LED is L, it meets and concerns tan (α/2)=L/M, the lighting angle that wherein α is LED, M is the distance of LED to backlight module (1) plane.

3. the LCDs of direct-light type LED backlight according to claim 2, is characterized in that, the lighting angle α of described LED is 120 °.

4. the LCDs of direct-light type LED backlight according to claim 1, is characterized in that, described entity housing (3) inside edge overlaps setting with the outer edge of liquid crystal board (2).