CN102221164A - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
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- CN102221164A CN102221164A CN201110127433XA CN201110127433A CN102221164A CN 102221164 A CN102221164 A CN 102221164A CN 201110127433X A CN201110127433X A CN 201110127433XA CN 201110127433 A CN201110127433 A CN 201110127433A CN 102221164 A CN102221164 A CN 102221164A
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Abstract
The invention is suitable for the technical field of display, and provides a backlight module and a liquid crystal display device. The backlight module comprises a light source and a light guiding plate, wherein the light guiding plate has a light inlet surface, a bottom surface connected with the light inlet surface and a light outlet surface opposite to the bottom surface; an optical shaft of the light source is formed to an included angle with the bottom surface of the light guiding plate. The included angle is formed between the optical shaft of the light source and the bottom surface of the light guiding plate by the invention, thus the light emitted by the light source and overlapped with or parallel to the optical shaft, namely the part of light with the strongest light power is aslant projected to the bottom surface of the light guiding plate, and is emitted outside through the light outlet surface of the light guiding plate to largely improve the light energy utilization rate; that is, the power of the light source needed by the backlight module with the same brightness is lower, thus the number of the light sources is decreased, the cost is reduced, and the heating quantity of the backlight module is reduced, the service life of the backlight module is prolonged; and the brightness of the backlight module produced by the light source with the same power is higher.
Description
Technical field
The invention belongs to the Display Technique field, relate in particular to a kind of module backlight and liquid crystal indicator.
Background technology
The LED-backlit technology mainly is divided into two kinds of side entering type and straight-down negatives according to the position of light source and LGP relation, if led light source is positioned at the LGP side, then is called side entering type; If led light source is positioned at the LGP downside, then be called straight-down negative.In the side entrance back module, light shines to screen center and far-end by LGP.When light shone site, LGP bottom, total reflection was destroyed, because reflector plate is arranged at the LGP bottom, light penetrates from the LGP top.By adjusting the dot shape and the rule of arranging thereof, reach the effect of the even bright dipping of entire module.
But the localization method of LED and LGP is reasonable inadequately in the side entrance back module that present industry prevails, and causes the efficiency of light energy utilization low.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of module backlight, is intended to solve the existing low problem of the module efficiency of light energy utilization backlight.
The embodiment of the invention is to realize like this, a kind of module backlight, comprise light source and LGP, described LGP has an incidence surface, a bottom surface and an exiting surface relative with described bottom surface that links to each other with described incidence surface, and the optical axis of described light source and the bottom surface of described LGP have angle.
Another purpose of the embodiment of the invention is to provide a kind of liquid crystal indicator, and described liquid crystal indicator adopts above-mentioned module backlight.
The embodiment of the invention has angle the optical axis of light source and the bottom surface of LGP, to send with its optical axis coincidence or parallel light be the bottom surface that the strongest that part of light of light intensity is projected to inclination this LGP to light source like this, exiting surface through this LGP penetrates again, greatly promoted the efficiency of light energy utilization, the power of the required light source of module backlight that is same brightness is lower, thereby reduces the quantity of light source, reduces cost, also reduce simultaneously the caloric value of module backlight, helped to prolong the life-span of module backlight; The brightness of the made module backlight of light source of equal-wattage is higher.
Description of drawings
Fig. 1 is the structural representation of the LED-backlit module that provides of the embodiment of the invention;
Fig. 2 is the distribution curve flux figure of LED;
Fig. 3 is the structural representation of the LED-backlit module that provides of another embodiment of the present invention.
The specific embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The embodiment of the invention has angle the optical axis of light source and the bottom surface of LGP, to send with its optical axis coincidence or parallel light be the bottom surface that the strongest that part of light of light intensity is projected to inclination LGP to this light source like this, exiting surface through LGP penetrates again, greatly promoted the efficiency of light energy utilization, the power of the required light source of module backlight of same brightness is lower, and the brightness of the made module backlight of light source of equal-wattage is higher.
The module backlight that the embodiment of the invention provides comprises light source and LGP, described LGP has an incidence surface, a bottom surface and an exiting surface relative with described bottom surface that links to each other with described incidence surface, and the optical axis of described light source and the bottom surface of described LGP have angle.
The liquid crystal indicator that the embodiment of the invention provides adopts above-mentioned module backlight.
Realization of the present invention is described in detail as light source with LED below.
As shown in Figure 1, the module backlight that the embodiment of the invention provides comprises LED1 and LGP 2, and this LGP 2 has an incidence surface 21, a bottom surface 22 that links to each other with this incidence surface 21 and an exiting surface 23 relative with this bottom surface 22.The bottom surface 22 of the optical axis OP of this LED1 and this LGP α that has angle wherein, to send with its optical axis coincidence or parallel light be the bottom surface 22 that the strongest that part of light of light intensity (0 ° of angle light among Fig. 2) is projected to inclination this LGP to this LED1 like this, exiting surface 23 through this LGP penetrates again, greatly promoted the LED efficiency of light energy utilization, the power of the required LED of module backlight that is same brightness is lower, thereby reduce the number of LED, reduce cost, also reduce simultaneously the caloric value of module backlight, helped to prolong the life-span of module backlight; The brightness of the made module backlight of LED of equal-wattage is higher.
Usually, LED1 is fixedly arranged on a substrate 31, adjusts the substrate side surfaces set firmly this LED1, make incidence surface 21 angulations of itself and LGP equal above-mentioned angle.So only need LED1 is fixedly arranged on this substrate side surfaces, the bottom surface 22 of its optical axis and this LGP is had angle, simple, practicality.
As preferably, the cross section of this substrate 31 is trapezoidal, and its inclined-plane 33 is for setting firmly the side of LED1.
Fig. 3 shows the structure of the LED-backlit module that another embodiment of the present invention provides, LGP 2 is by a backboard 4 protection in the present embodiment, wherein this backboard 4 has a horizontal part 41 and the rake 42 that links to each other with this horizontal part 41, and this rake 42 is the complementary angle of above-mentioned angle with horizontal part 41 angulations.This moment, cross section was the rake 42 that the substrate 32 of rectangle is fixedly arranged on this backboard, and LED1 then is fixedly arranged on the side of this substrate 32, and the optical axis of LED1 and the bottom surface 22 of this LGP are had angle, and a need will have backboard now and be replaced by this backboard 4, and cost is extremely low.
Above-mentioned angle α is preferably 0.5～3 °.In addition, lay a plurality of sites in the bottom surface 22 of LGP, this site along away from the direction of this incidence surface by dredging to solid matter cloth.That part of light that the light that LED1 sends, especially light intensity are the strongest is projected to each site after entering LGP 2, reaches diffuse reflection through each site, realizes even bright dipping, the emitting brightness height.
The embodiment of the invention has angle the optical axis of light source and the bottom surface of LGP, to send with its optical axis coincidence or parallel light be the bottom surface that the strongest that part of light of light intensity is projected to inclination this LGP to light source like this, exiting surface through this LGP penetrates again, greatly promoted the efficiency of light energy utilization, the power of the required light source of module backlight that is same brightness is lower, thereby reduces the quantity of light source, reduces cost, also reduce simultaneously the caloric value of module backlight, helped to prolong the life-span of module backlight; The brightness of the made module backlight of light source of equal-wattage is higher.Light source is fixedly arranged on a substrate, adjusts the substrate side surfaces set firmly this light source, make the incidence surface angulation of itself and LGP equal above-mentioned angle, so only need light source is fixedly arranged on this substrate side surfaces, the bottom surface of its optical axis and this LGP is had angle, simple, practicality.In addition, also can be by backboard protection LGP, wherein this backboard has a horizontal part and the rake that links to each other with this horizontal part, and to make this rake and horizontal part angulation be the complementary angle of above-mentioned angle, with cross section is the rake that the substrate of rectangle is fixedly arranged on this backboard, and light source then is fixedly arranged on the side of this substrate, and the optical axis of light source and the bottom surface of this LGP are had angle, only need to have backboard now and be replaced by this backboard, cost is extremely low.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. module backlight, comprise light source and LGP, described LGP has an incidence surface, a bottom surface and an exiting surface relative with described bottom surface that links to each other with described incidence surface, it is characterized in that the optical axis of described light source and the bottom surface of described LGP have angle.
2. module backlight as claimed in claim 1 is characterized in that, described light source is LED.
3. module backlight as claimed in claim 1 or 2 is characterized in that described light source is fixedly arranged on a substrate, and described substrate sets firmly the side of described light source and the incidence surface angulation of described LGP equals described angle.
4. module backlight as claimed in claim 3 is characterized in that, the cross section of described substrate is trapezoidal, and the inclined-plane of described substrate is the side that sets firmly described light source.
5. module backlight as claimed in claim 1 or 2, it is characterized in that, described LGP is protected by a backboard, described backboard has a horizontal part and the rake that links to each other with described horizontal part, described rake and horizontal part angulation are the complementary angle of described angle, and described substrate is fixedly arranged on the rake of described backboard.
6. module backlight as claimed in claim 5 is characterized in that, the cross section of described substrate is a rectangle.
7. as claim 4 or 6 described modules backlight, it is characterized in that described angle is 0.5～3 °.
8. as claim 4 or 6 described modules backlight, it is characterized in that the bottom surface of described LGP is distributed with a plurality of sites, described site along away from the direction of described incidence surface by dredging to solid matter cloth.
9. module backlight as claimed in claim 7 is characterized in that the bottom surface of described LGP is distributed with a plurality of sites, described site along away from the direction of described incidence surface by dredging to solid matter cloth.
10. a liquid crystal indicator is characterized in that, described liquid crystal indicator adopts as each described module backlight in the claim 1～9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110127433XA CN102221164A (en) | 2011-05-17 | 2011-05-17 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110127433XA CN102221164A (en) | 2011-05-17 | 2011-05-17 | Backlight module and liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
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| CN102221164A true CN102221164A (en) | 2011-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201110127433XA Pending CN102221164A (en) | 2011-05-17 | 2011-05-17 | Backlight module and liquid crystal display device |
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| CN (1) | CN102221164A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913816A (en) * | 2012-09-28 | 2013-02-06 | 京东方科技集团股份有限公司 | Sidelight type backlight module and liquid crystal display device |
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| CN2837886Y (en) * | 2005-11-07 | 2006-11-15 | 比亚迪股份有限公司 | LCD backlight module |
| CN1991496A (en) * | 2005-12-28 | 2007-07-04 | 中华映管股份有限公司 | Backlight components of light-emitting diode chip |
| CN101017284A (en) * | 2007-03-02 | 2007-08-15 | 友达光电股份有限公司 | Light source device |
| CN101571264A (en) * | 2008-04-30 | 2009-11-04 | 上海广电Nec液晶显示器有限公司 | LED backlight module |
| CN101893189A (en) * | 2010-07-14 | 2010-11-24 | 深圳市华星光电技术有限公司 | Backlight module and display device |
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2011
- 2011-05-17 CN CN201110127433XA patent/CN102221164A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2837886Y (en) * | 2005-11-07 | 2006-11-15 | 比亚迪股份有限公司 | LCD backlight module |
| CN1991496A (en) * | 2005-12-28 | 2007-07-04 | 中华映管股份有限公司 | Backlight components of light-emitting diode chip |
| CN101017284A (en) * | 2007-03-02 | 2007-08-15 | 友达光电股份有限公司 | Light source device |
| CN101571264A (en) * | 2008-04-30 | 2009-11-04 | 上海广电Nec液晶显示器有限公司 | LED backlight module |
| CN101893189A (en) * | 2010-07-14 | 2010-11-24 | 深圳市华星光电技术有限公司 | Backlight module and display device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913816A (en) * | 2012-09-28 | 2013-02-06 | 京东方科技集团股份有限公司 | Sidelight type backlight module and liquid crystal display device |
| CN102913816B (en) * | 2012-09-28 | 2015-11-11 | 京东方科技集团股份有限公司 | Side-light backlight module and liquid crystal indicator |
| US9223082B2 (en) | 2012-09-28 | 2015-12-29 | Beijing Boe Display Technology Co., Ltd. | Backlight assembly and liquid crystal display device |
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Application publication date: 20111019 |