CN101968186A - Large luminous angle LED backlight source module - Google Patents

Large luminous angle LED backlight source module Download PDF

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Publication number
CN101968186A
CN101968186A CN 201010241113 CN201010241113A CN101968186A CN 101968186 A CN101968186 A CN 101968186A CN 201010241113 CN201010241113 CN 201010241113 CN 201010241113 A CN201010241113 A CN 201010241113A CN 101968186 A CN101968186 A CN 101968186A
Authority
CN
China
Prior art keywords
led
light
lgp
source
emitting source
Prior art date
Application number
CN 201010241113
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Chinese (zh)
Inventor
苏世虎
Original Assignee
南京中电熊猫液晶显示科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 南京中电熊猫液晶显示科技有限公司 filed Critical 南京中电熊猫液晶显示科技有限公司
Priority to CN 201010241113 priority Critical patent/CN101968186A/en
Publication of CN101968186A publication Critical patent/CN101968186A/en

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Abstract

The invention discloses a large luminous angle LED backlight source module, comprising an LED light-emitting source (240), a reflecting device (250), a light guide plate (210), a frame (220) and an optical film, wherein the LED light-emitting source (240), the reflecting device (250), the light guide plate (210) and the optical film are positioned in the frame (220); the reflecting device (250) is provided with a reflecting surface which is opposite to the incident surface of the light guide plate (210); the LED light-emitting source (240) is arranged between the reflecting device (250) and the incident surface of the light guide plate (210); and a light-emitting surface of the LED light-emitting source (240) is faced to the incident surface of the light guide plate (210). The large luminous angle LED backlight source module is characterized in that a lens structure (230) for extending the angle of a light source is arranged at the incident surface of the light guide plate (21), which corresponds to the LED light-emitting source (240). The invention overcomes the defects in the traditional LED backlight source technology that long light-mixing distance and dark areas exist between adjacent LEDs, effectively shortens the light-mixing distance and can reduce or eliminate the existing dark areas.

Description

Big luminous corner LED backlight source module

Technical field

The present invention relates to a kind of LCD leaded light technology, especially a kind of LED-backlit source module that can enlarge luminous angle, specifically a kind of big luminous corner LED backlight source module.

Background technology

Liquid crystal indicator has light weight, thin thickness, end power consumption and the little characteristics of radiation, has been widely used in fields such as information technology, multimedia technology, and becomes the main flow of various display unit gradually.Because liquid crystal panel itself is not luminous, need module backlight to provide light source for it.Generally speaking, die set light source backlight has cathode fluorescent tube (CCFL) and light emitting diode (LED).Cathode fluorescent tube contains hazardous substance, and is undoubtedly a kind of injury for environmental protection, and the cathode fluorescent tube life-span is short, directly influences the service life of liquid crystal indicator.That light emitting diode has is pollution-free, long-life, vibration resistance, shock resistance and free of contamination characteristics.

Therefore, adopting LED as source backlight, is the inexorable trend of liquid crystal development.LED generally uses on undersized LCDs, and is first-class as mobile phone, PDA, notebook.Because development of technology, make the brightness of LED that bigger lifting arranged in recent years, the alternative of large scale liquid crystal backlight sources of display device in having become, LED as the demand of liquid crystal indicator back light in continuous increase.

LED is as liquid crystal indicator source backlight, and in middle large scale, arrangement is the LED that arranges some in the one or both sides of Liquid Crystal Module back light unit, perhaps is arranged to straight-down negative in the large scale.

Fig. 1 is a kind of liquid crystal display structure schematic diagram of prior art side light type LED back light module.This device comprises light source 130, a LGP 110, framework 120, a reflection unit 140, a liquid crystal display 100 and one group of blooming piece (omit among the blooming piece figure, do not show).This framework 120 is accommodated LGP 110, light source 130, reflection unit 140, liquid crystal display 100 and blooming piece.This LGP has incidence surface, and reflection unit 140 reflectings surface and LGP 110 incidence surfaces are oppositely arranged, and light source 130 is arranged between LGP 110 and the reflection unit 140.

Because of LED is a spot light, and the LED exiting surface has certain beam angle a, between adjacent two LED130 one determining deviation is set, just mix with the light that adjacent LED130 light source sends after light that LED130 sends leaves LED130 exiting surface certain distance, light mixing distance is relevant with the spacing of 130 settings of adjacent LED.Before adjacent two LED mixed lights, there is a dark space 150 between two LED.Therefore when satisfying the gray scale specification requirement, bigger as the spacing that is provided with between LED, then the light mixing distance between adjacent LED just increases, and the dark space also increases.In order to solve the dark space problem that exists before the big and mixed light of light mixing distance, a kind of method is an increase LED130 quantity, reduces spacing between LED130.So not only increased cost, caused that module power consumption backlight increases, how backlight LED quantity module power consumption more be also high more simultaneously, and caloric value is also big more, and module backlight is also heavy more, and cost is also high more.Other method increases light mixing distance between adjacent LED exactly, make the dark space be distributed in LGP 110 with exterior domain, this will increase the size of module backlight, cause the increase of weight and cost, and but the excursion of light mixing distance is subjected to restrictions such as integrally-built maximum form factors, also is limited by increasing this method of light mixing distance.

Summary of the invention

The objective of the invention is the problem that rises and exist the less LED of the causing use amount in luminous angle to increase at the LED in the existing backlight source module, design need not to increase LED quantity and varying sizedly can enlarge luminous angle, improves the big luminous corner LED backlight source module of display quality.

Technical scheme of the present invention is:

A kind of big luminous corner LED backlight source module, comprise LED light emitting source 240, reflection unit 250, LGP 210, framework 220 and blooming piece, LED light emitting source 240, reflection unit 250, LGP 210 and blooming piece all are arranged in framework 220, described reflection unit 250 has a reflecting surface, the incidence surface of this reflecting surface and LGP 210 is oppositely arranged, LED light emitting source 240 is arranged between reflection unit 250 and LGP 210 incidence surfaces, the light-emitting area of LED light emitting source 240 is characterized in that towards the incidence surface of LGP 210 the incidence surface place of described LGP 210 corresponding LED light emitting sources 240 is provided with the lens arrangement 230 of expansion light source angle.

Described LED light emitting source 240 is white light LEDs, green light LED, red-light LED, blue-ray LED or two or more combination wherein.

Beneficial effect of the present invention:

The invention solves in the existing LED-backlit source technology deficiency of the big and dark space that exists of light mixing distance between adjacent LED.Effectively reduce light mixing distance, can reduce even eliminate the dark space that exists.

Description of drawings

Fig. 1 is the structural representation of existing side light type LED back light mould level.

Fig. 2 is a plan structure schematic diagram of the present invention.

Fig. 3 is part (A) enlarged drawing of Fig. 2.

Fig. 4 is a perspective view of the present invention.

Fig. 5 is part (B) enlarged drawing of Fig. 4.

The specific embodiment

The present invention is further illustrated below in conjunction with drawings and Examples.

Shown in Fig. 2-5.

A kind of big luminous corner LED backlight source module, comprise LED light emitting source 240, reflection unit 250, LGP 210, framework 220 and blooming piece, LED light emitting source 240, reflection unit 250, LGP 210 and blooming piece all are arranged in framework 220, as Fig. 2, shown in 4, described reflection unit 250 has a reflecting surface, the incidence surface of this reflecting surface and LGP 210 is oppositely arranged, LED light emitting source 240 is arranged between reflection unit 250 and LGP 210 incidence surfaces, the light-emitting area of LED light emitting source 240 is towards the incidence surface of LGP 210, the incidence surface place of described LGP 210 corresponding LED light emitting sources 240 is provided with the lens arrangement 230 of expansion light source angle, as shown in Figure 3.Described LED light emitting source 240 can be white light LEDs, green light LED, red-light LED, blue-ray LED or two or more combination wherein.During concrete enforcement, LGP 210 can have the groove of accommodating LED wholly or in part with the LED relative position, and the shape of its groove can change, as shown in Figure 5; Also can be that LED embeds in the LGP, form one with LGP.The relative LGP setting of LED, LED is arranged on one side of LGP at least, or LGP two relative edges setting, or four limits are provided with and adjacent both sides are provided with.

Module backlight of the present invention is not limited only to the backlight for liquid crystal display source, also comprises adopting other application as light source of this module backlight.

Fig. 2 is a common embodiment of the present invention, this module backlight comprises that at least one LED light emitting source 240, a reflection unit 250, a LGP 210, a framework 220 and one group of blooming piece (omit among the blooming piece figure, do not show, prior art is identical), light emitting source LED240 is arranged between reflection unit 250 and LGP 210 incidence surfaces, and light emitting source LED240 exiting surface is towards the incidence surface of LGP 210.

Fig. 3 is the A portion enlarged drawing of Fig. 2.The optical lens structure 230 that the corresponding LED light emitting source 240 of the incidence surface of LGP 210 has the expansion light source angle among Fig. 3.The a angular light that LED light emitting source 240 sends, after the optical lens mechanism 230 of LGP 210 upper angles expansions, the b angle is expanded at luminous angle to, and then realizes shortening light mixing distance, reduces even eliminates the dark space.

Though more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, under the prerequisite that does not deviate from principle of the present invention and essence, can make numerous variations or modification to these embodiments.Therefore, protection scope of the present invention is limited by appended claims.

The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.

Claims (2)

1. one kind big luminous corner LED backlight source module, comprise LED light emitting source (240), reflection unit (250), LGP (210), framework (220) and blooming piece, LED light emitting source (240), reflection unit (250), LGP (210) and blooming piece all are arranged in framework (220), described reflection unit (250) has a reflecting surface, the incidence surface of this reflecting surface and LGP (210) is oppositely arranged, LED light emitting source (240) is arranged between reflection unit (250) and LGP (210) incidence surface, the light-emitting area of LED light emitting source (240) is characterized in that towards the incidence surface of LGP (210) the incidence surface place of the corresponding LED light emitting source of described LGP (210) (240) is provided with the lens arrangement (230) of expansion light source angle.
2. big luminous corner LED backlight source module according to claim 1 is characterized in that described LED light emitting source (240) is white light LEDs, green light LED, red-light LED, blue-ray LED or two or more combination wherein.
CN 201010241113 2010-07-30 2010-07-30 Large luminous angle LED backlight source module CN101968186A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010241113 CN101968186A (en) 2010-07-30 2010-07-30 Large luminous angle LED backlight source module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201010241113 CN101968186A (en) 2010-07-30 2010-07-30 Large luminous angle LED backlight source module

Publications (1)

Publication Number Publication Date
CN101968186A true CN101968186A (en) 2011-02-09

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102506361A (en) * 2011-11-22 2012-06-20 南京中电熊猫液晶显示科技有限公司 LED backlight module
CN102913812A (en) * 2011-08-01 2013-02-06 瀚宇彩晶股份有限公司 Light source module structure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2593228Y (en) * 2002-12-19 2003-12-17 姚志图 Planar upper light source
CN2743867Y (en) * 2004-10-18 2005-11-30 三和企业股份有限公司 Light conducting plate
CN1758116A (en) * 2004-10-05 2006-04-12 三星电子株式会社 White light generating unit, backlight assembly and liquid crystal display device
CN101097349A (en) * 2006-06-30 2008-01-02 Lg.菲利浦Lcd株式会社 Backlight assembly and liquid crystal display device having the same
CN101206280A (en) * 2007-12-20 2008-06-25 清华大学 Light guide board and back light module unit using the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2593228Y (en) * 2002-12-19 2003-12-17 姚志图 Planar upper light source
CN1758116A (en) * 2004-10-05 2006-04-12 三星电子株式会社 White light generating unit, backlight assembly and liquid crystal display device
CN2743867Y (en) * 2004-10-18 2005-11-30 三和企业股份有限公司 Light conducting plate
CN101097349A (en) * 2006-06-30 2008-01-02 Lg.菲利浦Lcd株式会社 Backlight assembly and liquid crystal display device having the same
CN101206280A (en) * 2007-12-20 2008-06-25 清华大学 Light guide board and back light module unit using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102913812A (en) * 2011-08-01 2013-02-06 瀚宇彩晶股份有限公司 Light source module structure
CN102506361A (en) * 2011-11-22 2012-06-20 南京中电熊猫液晶显示科技有限公司 LED backlight module

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Application publication date: 20110209