CN102486275A - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
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- CN102486275A CN102486275A CN2010105935360A CN201010593536A CN102486275A CN 102486275 A CN102486275 A CN 102486275A CN 2010105935360 A CN2010105935360 A CN 2010105935360A CN 201010593536 A CN201010593536 A CN 201010593536A CN 102486275 A CN102486275 A CN 102486275A
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- separation trough
- backlight module
- liquid crystal
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Abstract
The invention provides a backlight module and a liquid crystal display device, which can solve the problem of bad optical quality of the liquid crystal display device due to the difficult aligning of the backlight module which is formed by assembling a plurality of light guide plates. The backlight module comprises a guide light plate and a plurality of light-emitting elements. The guide light plate is provided with a plurality of separation grooves, a bottom surface, a light-out surface, a first side and a second side. The bottom surface is opposite to the light-out surface. The first and the second sides are positioned at the opposite two sides of the guide light plate. All the separation grooves extend from the first side to the second side. Each separation groove is provided with an opening which is positioned at the bottom surface. The light-emitting elements are arranged on at least one of the first and the second sides. A liquid crystal display panel of the liquid crystal display device is arranged at the light-out side.
Description
Technical field
The invention relates to a kind of backlight module and display unit, and particularly relevant for a kind of side incident type backlight module and liquid crystal indicator.
Background technology
Liquid crystal indicator has become the main flow of display unit product in recent years based on advantage such as its low voltage operating, radiationless line scattering, in light weight and volume be little.Liquid crystal indicator mainly comprises a liquid crystal panel and a backlight module, and backlight module is in order to provide liquid crystal panel required area source, so that liquid crystal indicator reaches the effect of demonstration.Liquid crystal indicator is the rotation by the liquid crystal molecule of control in the liquid crystal panel, produces grey scale change with pass through the amount of decision light, and then forms static state or image dynamically.
When dynamic image that human eye is watched on the liquid crystal indicator being play; After can staying for some time, each digital picture changes to next picture again; Therefore mobile object is not to be shown with the mode that moves continuously in the picture of the front and back of digitized video, but shows with the mode that spacing distance moves.Yet, when human eye is watched mobile object, can go to follow the trail of the position of movement of objects, and in the picture conversion process of liquid crystal indicator, backlight module still continues to provide light source.Therefore; Human eye just is easy in the process of picture conversion (liquid crystal molecule rotating process just), discover object and discontinuous moving; And because the position that persists in the front and back picture of the image of same mobile object on retina is different; And produce smear (double image) phenomenon and cause image contour unintelligible, further the display quality to liquid crystal indicator causes bad influence.
In order to address the above problem, a kind of scanning backlight module is suggested.The scanning backlight module is to adopt the mode of divisional light emission, sees the chance of the process of picture conversion to reduce human eye.The light-emitting component that each district is lighted in the direct type backlight module utilization in turn can be easier to reach the purpose of divisional light emission, but has the bigger defective of integral thickness.Side incident type backlight module adopts a plurality of light-emitting component divisional light emissions in order to reach the purpose of divisional light emission, and in each district's correspondence independently LGP is set, and these LGPs are fitted together.Though side incident type backlight module has the less advantage of integral thickness; But a plurality of LGPs the time have contraposition in assembling to be difficult for and to cause the not good defective of optical quality; In addition; Each independent LGP can be because the tolerance on making, and length and width and thickness all can be variant, also can cause after the assembling respectively to distinguish the optical quality inequality and picture problems such as bright line occur at each independent LGP seam crossing.
Summary of the invention
The present invention provides a kind of backlight module, the problem that contraposition is difficult in the time of can solving backlight module and assembled by the polylith LGP.
The present invention provides a kind of liquid crystal indicator in addition, the defective of optics bad in the time of can solving backlight module and assembled by the polylith LGP.
Backlight module of the present invention comprises a LGP and a plurality of light-emitting component.LGP has multiple tracks separation trough, a bottom surface, an exiting surface, one first side and one second side.Bottom surface and exiting surface are relative.First side and second side are positioned at the relative two sides of LGP.The bearing of trend of each separation trough extends from first side toward second side.Each separation trough has an opening, and opening is positioned at the bottom surface.A plurality of light-emitting components are disposed at first side.
Liquid crystal indicator of the present invention comprises an aforesaid backlight module and a liquid crystal panel that is disposed at the exiting surface of LGP.
In one embodiment of this invention, the degree of depth of each separation trough immobilizes along the bearing of trend of each separation trough.
In one embodiment of this invention, the degree of depth of each separation trough half the more than or equal to the thickness of LGP.
In one embodiment of this invention, each separation trough in the degree of depth at two ends less than the degree of depth in central authorities.In addition, each separation trough for example equals the thickness of LGP in the degree of depth of central authorities.
In one embodiment of this invention, the width of the opening of each separation trough is less than or equal to 1 millimeter.
In one embodiment of this invention, the spacing of separation trough is identical.
In one embodiment of this invention, backlight module more comprises a plurality of control loops, and wherein the area relative light-emitting component between per two adjacent separation troughs is controlled by same control loop.
In one embodiment of this invention, backlight module more comprises separation trough a plurality of times, and wherein at least one time separation trough is arranged between the adjacent separation trough.
In one embodiment of this invention, backlight module more comprises a plurality of reflecting elements, is disposed in the separation trough.
Based on above-mentioned, in backlight module of the present invention and liquid crystal indicator, LGP has the multiple tracks separation trough and can reach the purpose that subregion provides light source, and can exempt the contraposition step in when assembling and promote optical quality.
Description of drawings
For let above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, elaborate below in conjunction with the accompanying drawing specific embodiments of the invention, wherein:
Fig. 1 is the liquid crystal indicator of one embodiment of the invention and the explosive view of backlight module.
Fig. 2 is the side schematic view of the backlight module of Fig. 1.
Fig. 3 and Fig. 4 are the side schematic views of LGP of the backlight module of two other embodiment of the present invention.
Fig. 5 is the sketch map of the backlight module of another embodiment of the present invention.
Fig. 6 is the sketch map of the backlight module of another embodiment of the present invention.
The main element symbol description:
50: liquid crystal indicator
60: liquid crystal panel
100,500,600: backlight module
110,210,310,510,610: LGP
112,212,312,512,612: separation trough
120,520,620: light-emitting component
122: circuit board
130,530,630: control loop
140: control chip
150: backboard
160: reflector plate
170: blooming piece
S12: bottom surface
S14: exiting surface
S16: first side
S18: second side
P10: opening
W10: width
H10, H22, H24, H32, H36: the degree of depth
H12, H34: thickness
514: location structure
550: reflecting element
613: inferior separation trough
The specific embodiment
Fig. 1 is the liquid crystal indicator of one embodiment of the invention and the explosive view of backlight module, and Fig. 2 is the side schematic view of the backlight module of Fig. 1.Please with reference to Fig. 1, the liquid crystal indicator 50 of present embodiment comprises a liquid crystal panel 60 and a backlight module 100.The backlight module 100 of present embodiment comprises a backboard 150, a reflector plate 160, a LGP 110, a plurality of light-emitting component 120 and a blooming piece 170.LGP 110 has multiple tracks separation trough 112, a bottom surface S12, an exiting surface S14, one first side S16 and one second side S18.Bottom surface S12 is relative with exiting surface S14, and just both are respectively the lower surface and the upper surface of LGP 110.The first side S16 and the second side S18 are positioned at the relative two sides of LGP 110, and the first side S16 and the second side S18 are also non-conterminous.The bearing of trend of each separation trough 112 is to extend from the first side S16 toward the second side S18.The opening P10 of separation trough 112 is positioned at bottom surface S12.A plurality of light-emitting components 120 are disposed at the first side S16 and the second side S18 of LGP 110.
The LGP 110 of present embodiment is separated into a plurality of zones with a plurality of separation troughs 112, and when the corresponding light-emitting component 120 in each zone was lighted, light can receive the limitation of separation trough 112 and roughly only penetrate from the pairing exiting surface S14 of single area.Whereby, can reach the purpose that subregion provides light source, and then promote the display quality of liquid crystal indicator 50 when video display of present embodiment.Simultaneously; LGP 110 still need not assembled contraposition for single element; Therefore can avoid being cut in the known technology problem of independently a plurality of separately LGPs necessary contraposition when assembling; And can avoid the dimensional tolerance problem between independently a plurality of separately LGPs, and then promote the optical quality of the backlight module 50 of present embodiment.In addition, the backlight module 50 of present embodiment is the design of adopting the side light inlet, and not only integral thickness is less, also can save the time of lighting, brightness and or the usage quantity and reach the purpose of saving the energy of light-emitting component 120.
The separation trough 112 of present embodiment is to be example to be band shape, and each road separation trough 112 is roughly parallel to each other.Only be represented by dotted lines the wherein shape of twice separation trough 112 among Fig. 1.Fig. 2 is the side schematic view of LGP 110 and light-emitting component 120 in the present embodiment; The depth H 10 of the separation trough 112 of present embodiment is changeless, that is separation trough 112 is from all immobilizing near the end of the first side S16 to the degree of depth near the end of the second side S18.The depth H 10 of each bar separation trough 112 is half the more than or equal to the thickness H12's of LGP 110, and less than the thickness H12 of LGP 110.The thickness H12 of LGP 110 is meant the thickness in most of zone of LGP 110, but LGP 110 possibly have other thin portion structures in the zone of periphery, does not comprise the thin portion thickness of structure that these do not illustrate at the thickness H12 of the LGP 110 of this indication.Among Fig. 1, the width W 10 of the opening P10 of the separation trough 112 of present embodiment is less than or equal to 1 millimeter, but the present invention is not limited to this.In addition, the width of the bottom of separation trough 112 can equal or be not equal to the width W 10 of the opening P10 of separation trough 112, that is can be rectangle, trapezoidal, triangle or other shapes from the shape of the being seen separation trough 112 of the first side S16.Yet the length of separation trough 112 bearing of trends can be less than or equal to the distance between the first side S16 and the second side S18, and the diagram of present embodiment is that the distance that the length with separation trough 112 bearing of trends equals between the first side S16 and the second side S18 is explained.Distance between the separation trough 112 of present embodiment is fixed, but the present invention is not limited to this.
The light-emitting component 120 of present embodiment is to be example with the light emitting diode, but the present invention is not limited to this.The light-emitting component 120 of present embodiment is configured on the circuit board 122.Circuit board 122 can be bendable or rigid design.The first side S16 of the LGP 110 of present embodiment and the second side S18 are other all to have light-emitting component 120, but also can only dispose light-emitting component 120 in the first side S16 of LGP 110.The backlight module 50 of present embodiment more comprises a plurality of control loops 130.The control loop 130 that is illustrated among Fig. 1 only is used for signal, is not the entity kenel of expression control loop 130.Light-emitting component 120 between per two adjacent separation troughs 112 is by 130 controls of same control loop, that is the light-emitting component 120 of different control loop 130 controls can open or close at different time, to reach subregion the purpose of light source is provided.In addition, these control loops 130 can be controlled by single control chip 140, but these control loops 130 also can be by a plurality of control chips controls in other embodiments.The light-emitting component 120 of same control loop 130 controls can adopt the design of parallel connection, series connection or mixing.
In addition, the configurable reflector plate 160 of the bottom surface S12 of LGP 110, the bottom surface S12 of LGP 110 also can print or be formed for destroying the structure of the total reflection of light.In addition, configurable blooming piece 170 between LGP 110 and the liquid crystal panel can be diffusion sheet, brightening piece etc.
Fig. 3 and Fig. 4 are the side schematic views of LGP of the backlight module of two other embodiment of the present invention.Please with reference to Fig. 3, the LGP 210 of the backlight module of present embodiment is similar with the LGP 110 of Fig. 2, the separation trough 212 that difference is LGP 210 in the depth H 22 at two ends less than depth H 24 in central authorities.The separation trough 212 of Fig. 3 has bigger depth H 24 in central authorities, can reduce light leaks to adjacent area from the interlude of separation trough 212 chance.Separation trough 212 is to change with linear mode when depth H 22 is changed into depth H 24.Then please with reference to Fig. 4; The LGP 310 of the backlight module of present embodiment is similar with the LGP 210 of Fig. 3; The separation trough 312 that difference is LGP 310 equals the thickness H34 of LGP 310 in the depth H 32 of central authorities, that is the middle body of separation trough 312 penetrates the upper and lower surfaces of LGP 310.In the present embodiment; For avoiding LGP 310 along separation trough 312 fractures; The depth H 36 at separation trough 312 two ends is less than the thickness H34 of LGP 310; And separation trough 312 have depth H 36 two paragraphs length must each greater than 1/12 of the total length of separation trough 312, and preferable separation trough 312 have depth H 36 two paragraphs length for each greater than 1/10 of the total length of separation trough 312.In addition, separation trough 312 is to change with nonlinear way when the depth H 32 of middle body is changed into the depth H 36 of two end portions.
Fig. 5 is the sketch map of the backlight module of another embodiment of the present invention.Please with reference to Fig. 5, the backlight module 500 of present embodiment is similar with the backlight module 100 of Fig. 1, only introduces its difference place at this.The both sides of the LGP 510 of present embodiment have location structure 514 or other possibly influence the structure of illuminance distribution property; Light-emitting component 520 is all between the extension line of outermost twice separation trough 512; That is LGP 510 does not have corresponding light-emitting component in the outer zone of outermost twice separation trough 512; So, outermost twice separation trough 512 can avoid location structure 514 to influence the uniformity of Luminance Distribution.Distance between the adjacent separation trough 512 of each of present embodiment is identical.
In addition, the backlight module 500 of present embodiment more comprises a plurality of reflecting elements 550, is disposed in the separation trough 512.Reflecting element 550 can be the tablet of reflection material, also can be the reflecting material that is coated with on the cell wall that is attached to separation trough 512, and perhaps reflecting element 550 also can be other suitable kenels.
Fig. 6 is the sketch map of the backlight module of another embodiment of the present invention.The backlight module 600 of present embodiment is similar with the backlight module 100 of Fig. 1, only introduces its difference place at this.In the embodiment in figure 1, a plurality of separation troughs 112 are separated into a plurality of zones with LGP 110, the light-emitting component 120 that each corresponding control loop 130 in zone is controlled; And the LGP 610 of present embodiment has a plurality of separation troughs 612 and a plurality of separation troughs 613; A plurality of separation troughs 612 are separated into a plurality of zones with LGP 610; The light-emitting component 620 that each corresponding control loop 630 in zone is controlled, a plurality of times 613 of separation troughs are arranged between a plurality of separation troughs 612, and a plurality of times separation trough 613 bearing of trends are roughly parallel with separation trough 612; The shape of inferior separation trough 613 and size can be selected the design identical with separation trough 612 for use, or select different design collocation for use; The purpose of inferior separation trough 613 is in leakage of light that the light-emitting component 620 that strengthen to intercept its The corresponding area the is sent ability in the adjacent domain.Between the adjacent separation trough 612 a time separation trough 613 is set in the present embodiment, but the present invention is not limited to this.
In sum; In backlight module of the present invention and liquid crystal indicator; LGP has the multiple tracks separation trough and can reach the purpose that subregion provides light source; And can exempt the contraposition step in when assembling and promote optical quality, avoid each independent LGP can be simultaneously because the tolerance on making cause respectively distinguishing the optical quality inequality and picture problems such as bright line occur at each independent LGP seam crossing.
Though the present invention discloses as above with preferred embodiment; Right its is not that any those skilled in the art are not breaking away from the spirit and scope of the present invention in order to qualification the present invention; When can doing a little modification and perfect, so protection scope of the present invention is when being as the criterion with what claims defined.
Claims (20)
1. backlight module comprises:
One LGP; Have multiple tracks separation trough, a bottom surface, an exiting surface, one first side and one second side; Wherein this bottom surface is relative with this exiting surface, and this first side and this second side are positioned at the relative two sides of this LGP, and the bearing of trend of each separation trough extends toward this second side from this first side; And each separation trough has an opening, and this opening is positioned at this bottom surface; And
A plurality of light-emitting components are disposed at this first side.
2. backlight module as claimed in claim 1 is characterized in that the degree of depth of each separation trough immobilizes along the bearing of trend of each separation trough.
3. backlight module as claimed in claim 1 is characterized in that, the degree of depth of each separation trough is half the more than or equal to the thickness of this LGP.
4. backlight module as claimed in claim 1 is characterized in that, each separation trough in the degree of depth at two ends less than the degree of depth in central authorities.
5. backlight module as claimed in claim 4 is characterized in that, each separation trough equals the thickness of this LGP in the degree of depth of central authorities.
6. backlight module as claimed in claim 1 is characterized in that, the width of the opening of each separation trough is less than or equal to 1 millimeter.
7. backlight module as claimed in claim 1 is characterized in that the spacing of said separation trough is identical.
8. backlight module as claimed in claim 1 is characterized in that, more comprises a plurality of control loops, and wherein the said light-emitting component of area relative between per two adjacent said separation troughs is by same said control loop control.
9. backlight module as claimed in claim 8 is characterized in that, more comprises separation trough a plurality of times, and wherein at least one said separation trough is arranged between the adjacent said separation trough.
10. backlight module as claimed in claim 1 is characterized in that, more comprises a plurality of reflecting elements, is disposed in the said separation trough.
11. a liquid crystal indicator comprises:
One liquid crystal panel;
One backlight module comprises:
One LGP; Have multiple tracks separation trough, a bottom surface, an exiting surface, one first side and one second side, wherein this bottom surface is relative with this exiting surface, and this first side and this second side are positioned at the relative two sides of this LGP; The bearing of trend of each separation trough extends toward this second side from this first side; Each separation trough has an opening, and this opening is positioned at this bottom surface, and this liquid crystal panel is disposed at this exiting surface side of this LGP; And
A plurality of light-emitting components are disposed at this first side.
12. liquid crystal indicator as claimed in claim 11 is characterized in that, the degree of depth of each separation trough immobilizes along the bearing of trend of this separation trough respectively.
13. liquid crystal indicator as claimed in claim 11 is characterized in that, the degree of depth of each separation trough is half the greater than the thickness of this LGP.
14. liquid crystal indicator as claimed in claim 11 is characterized in that, each separation trough in the degree of depth at two ends less than the degree of depth in central authorities.
15. liquid crystal indicator as claimed in claim 14 is characterized in that, each separation trough equals the thickness of this LGP in the degree of depth of central authorities.
16. liquid crystal indicator as claimed in claim 11 is characterized in that, the width of the opening of each separation trough is less than or equal to 1 millimeter.
17. liquid crystal indicator as claimed in claim 11 is characterized in that, the spacing of said separation trough is identical.
18. liquid crystal indicator as claimed in claim 11 is characterized in that, this backlight module more comprises a plurality of control loops, and wherein the said light-emitting component of area relative between per two adjacent said separation troughs is by same said control loop control.
19. liquid crystal indicator as claimed in claim 18 is characterized in that, this backlight module more comprises separation trough a plurality of times, and wherein at least one said separation trough is arranged between the adjacent said separation trough.
20. liquid crystal indicator as claimed in claim 11 is characterized in that, this backlight module more comprises a plurality of reflecting elements, is disposed in the said separation trough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105935360A CN102486275A (en) | 2010-12-06 | 2010-12-06 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105935360A CN102486275A (en) | 2010-12-06 | 2010-12-06 | Backlight module and liquid crystal display device |
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| Publication Number | Publication Date |
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| CN102486275A true CN102486275A (en) | 2012-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105935360A Pending CN102486275A (en) | 2010-12-06 | 2010-12-06 | Backlight module and liquid crystal display device |
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| CN (1) | CN102486275A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501029A (en) * | 2014-11-19 | 2015-04-08 | 青岛歌尔声学科技有限公司 | LED backlight module, method of eliminating bright strips and bright spots for LED backlight module, and liquid crystal display |
| CN104714270A (en) * | 2015-03-20 | 2015-06-17 | 青岛海信移动通信技术股份有限公司 | Light guide film of mobile equipment and mobile equipment |
| WO2017173673A1 (en) * | 2016-04-06 | 2017-10-12 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN104880762B (en) * | 2015-06-09 | 2018-11-06 | 武汉华星光电技术有限公司 | Light guide plate and backlight module |
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| CN1595254A (en) * | 2003-09-12 | 2005-03-16 | 罗姆股份有限公司 | Light-emission control circuit |
| CN1928659A (en) * | 2005-09-09 | 2007-03-14 | 财团法人工业技术研究院 | Light guide plate and backlight module using same |
| CN101165515A (en) * | 2006-10-18 | 2008-04-23 | 财团法人工业技术研究院 | Light conductive board and the backlight module possessing same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595254A (en) * | 2003-09-12 | 2005-03-16 | 罗姆股份有限公司 | Light-emission control circuit |
| CN1928659A (en) * | 2005-09-09 | 2007-03-14 | 财团法人工业技术研究院 | Light guide plate and backlight module using same |
| CN101165515A (en) * | 2006-10-18 | 2008-04-23 | 财团法人工业技术研究院 | Light conductive board and the backlight module possessing same |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501029A (en) * | 2014-11-19 | 2015-04-08 | 青岛歌尔声学科技有限公司 | LED backlight module, method of eliminating bright strips and bright spots for LED backlight module, and liquid crystal display |
| CN104714270A (en) * | 2015-03-20 | 2015-06-17 | 青岛海信移动通信技术股份有限公司 | Light guide film of mobile equipment and mobile equipment |
| US9835788B2 (en) | 2015-03-20 | 2017-12-05 | Hisense Mobile Communications Technology Co., Ltd. | Light guide film of mobile device and mobile device |
| CN104880762B (en) * | 2015-06-09 | 2018-11-06 | 武汉华星光电技术有限公司 | Light guide plate and backlight module |
| WO2017173673A1 (en) * | 2016-04-06 | 2017-10-12 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display |
| US10261240B2 (en) | 2016-04-06 | 2019-04-16 | Wuhan China Star Optoelectronics Technology Co., Ltd | Backlight module and liquid crystal display |
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Application publication date: 20120606 |