CN105090892A - Light guide element and backlight module - Google Patents

Light guide element and backlight module Download PDF

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Publication number
CN105090892A
CN105090892A CN201510433989.XA CN201510433989A CN105090892A CN 105090892 A CN105090892 A CN 105090892A CN 201510433989 A CN201510433989 A CN 201510433989A CN 105090892 A CN105090892 A CN 105090892A
Authority
CN
China
Prior art keywords
protective bulkhead
light
guide
groove
bulkhead
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201510433989.XA
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Chinese (zh)
Inventor
曾杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Technology Co Ltd
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 Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Technology Co Ltd
Priority to CN201510433989.XA priority Critical patent/CN105090892A/en
Publication of CN105090892A publication Critical patent/CN105090892A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00Lighting devices intended for fixed installation
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016Grooves, prisms, gratings, scattering particles or rough surfaces
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133608Direct backlight including particular frames or supporting means

Abstract

The invention discloses a light guide element which comprises a light guide part, a first protection wall, a second protection wall and a third protection wall, wherein the first protection wall is opposite to the second protection wall; the third protection wall is located on one side far away from a light incoming surface of the light guide part; the first protection wall, the second protection wall, the third protection wall and the light guide part form accommodating space; and the accommodating space is used for accommodating an optical film. The light guide element can prevent the optical film from warping when the optical film receives an external force. The invention further discloses a backlight module.

Description

Light-guide device and backlight module
Technical field
The present invention relates to field of display, particularly, relate to a kind of light-guide device and a kind of backlight module.
Background technology
Backlight module is one of significant components of liquid crystal indicator, its role is to as liquid crystal indicator provides that brightness is enough, the uniform light source of distribution of light.Backlight module generally includes light source, light-guide device, optical diaphragm group and glue frame, and wherein, the incidence surface that light source closes on light-guide device is arranged, and blooming piece is arranged on light-guide device, and glue frame is then for being fixed together light source, light-guide device and blooming piece.Optical diaphragm group generally includes multiple blooming piece, such as brightness enhancement film, prism etc., presents effect for the gray scale of promoting backlight module, improves the display quality of liquid crystal indicator.Usually, described blooming piece and glue frame directly contact with fixed optics diaphragm, glue frame is normally made up of the polyester material of softness, in assembling or handling process, during by external force collision or extruding, glue frame is easily out of shape, cause the blooming piece be in contact with it also to be out of shape thereupon, cause blooming piece warpage, thus occur light leakage phenomena, light leakage phenomena can cause screen to produce bright uneven region.
Summary of the invention
In view of this, technical problem to be solved by this invention is, provides a kind of light-guide device, and described light-guide device can prevent from being out of shape by glue frame and causing the phenomenon of blooming piece warpage.
The present invention also provides a kind of backlight module comprising above-mentioned light-guide device.
In order to solve the problems of the technologies described above, on the one hand, the invention provides a kind of light-guide device, comprise: light guide section, first protective bulkhead, second protective bulkhead and the 3rd protective bulkhead, described light guide section has the first side, second side, 3rd side and the 4th side, described 4th side is the incidence surface of described light guide section, described first protective bulkhead, described second protective bulkhead and described 3rd protective bulkhead are arranged at described first side respectively, described second side and described 3rd side, described first protective bulkhead and described second protective bulkhead are oppositely arranged, described 3rd protective bulkhead is positioned at the side of the described incidence surface away from described light guide section, described first protective bulkhead, described second protective bulkhead, described 3rd protective bulkhead and described light guide section form a receiving space.
Wherein, described 3rd protective bulkhead has a groove, and described groove is arranged at the inwall of described 3rd protective bulkhead, and the bottom surface of described groove is concordant with the exiting surface of described light guide section.
Wherein, described first protective bulkhead and described second protective bulkhead all have a groove, and described groove is arranged at the inwall of described first protective bulkhead and described second protective bulkhead, and the bottom surface of described groove is concordant with the exiting surface of described light guide section.
Wherein, described first protective bulkhead, described second protective bulkhead and described 3rd protective bulkhead all have a groove; described groove is arranged at the inwall of described first protective bulkhead, described second protective bulkhead and the 3rd protective bulkhead, and the bottom surface of described groove is concordant with the exiting surface of described light guide section.
Wherein, described light-guide device also comprises multiple shielding plate, and described multiple shielding plate is arranged at the upper surface of described 3rd protective bulkhead separated from one anotherly and extends to described light guide section side.
Wherein, described light-guide device also comprises multiple shielding plate, and described multiple shielding plate is arranged at the upper surface of described first protective bulkhead and described second protective bulkhead separated from one anotherly, and described shielding plate extends to described light guide section side.
Wherein, described shielding plate is also arranged at the upper surface of described 3rd protective bulkhead.
Wherein, described light guide section, described first protective bulkhead, described second protective bulkhead and described 3rd protective bulkhead are the integral structure that can not be split.
On the other hand, present invention also offers a kind of backlight module, comprise blooming piece, glue frame, light source, circuit board, shading glue, reflector plate, and the light-guide device described in any one of claim 1 to 7, described blooming piece is contained in the described receiving space of described light-guide device, described light-guide device is fixed in described glue frame, described reflector plate is arranged at the below of described light-guide device and described glue frame, and described reflector plate is fixed on the lower surface of described glue frame, contiguous described incidence surface arranges described light source, circuit board is provided with above described light source, described light source and the described shading glue of described circuit board are fixed in described glue frame.
Wherein, described backlight module also comprises a sticking tablet, and described sticking tablet one end is pasted on the upper surface of described first protective bulkhead, the second protective bulkhead and/or the 3rd protective bulkhead, and the other end is pasted on the upper surface of described blooming piece.
Compared with prior art; the present invention has following technique effect: in light-guide device of the present invention; first protective bulkhead of light-guide device, the second protective bulkhead, the 3rd protective bulkhead and light guide section form receiving space; blooming piece can be contained in light-guide device; during assembling; blooming piece and light-guide device are integrally assembled in the glue frame of backlight module, and when glue frame deforms, blooming piece, owing to being subject to the protection of light-guide device, distortion, warpage is less likely to occur.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the light guide section of light-guide device in an embodiment of the invention;
Fig. 2 is the structural representation of light-guide device in an embodiment of the invention;
Fig. 3 is the schematic cross-section of backlight module in an embodiment of the invention;
Fig. 4 is the schematic cross-section of backlight module in an embodiment of the invention;
Fig. 5 is the schematic cross-section of backlight module in an embodiment of the invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in embodiment of the present invention, the technical scheme in embodiment of the present invention is clearly and completely described.
Word of the present invention " upper surface " refers to that, with exiting surface towards identical surface, lower surface is then the surface towards the opposite with exiting surface.
Refer to Fig. 1 and Fig. 2, an embodiment of the invention provide a kind of light-guide device 100, comprise: light guide section 110, first protective bulkhead 121, second protective bulkhead 122 and the 3rd protective bulkhead 123, light guide section 110 has the first side 121 ', second side 122 ', 3rd side 123 ' and the 4th side 130 ', 4th side 130 ' is the incidence surface 130 of light guide section 110, first protective bulkhead 121, second protective bulkhead 122 and the 3rd protective bulkhead 123 are arranged at the first side 121 ' respectively, second side 122 ', 3rd side 123 ', first protective bulkhead 121 and the second protective bulkhead 122 are oppositely arranged, 3rd protective bulkhead 123 is positioned at the side of the described incidence surface away from described light guide section, first protective bulkhead 121, second protective bulkhead 122, 3rd protective bulkhead 123 forms a receiving space with light guide section 110, described receiving space is used for accommodating blooming piece, in order to limit and protection blooming piece.In one embodiment, the first protective bulkhead 121, second protective bulkhead 122 and the 3rd protective bulkhead 123 can be set to extend along light direction 111.In one embodiment, the first protective bulkhead 121 and the second protective bulkhead 122 can be parallel to each other, and the 3rd protective bulkhead 123 can perpendicular to the first protective bulkhead 121 and the second protective bulkhead 122.
Refer to Fig. 3, Fig. 3 is the structural representation of backlight module in an embodiment of the invention.In present embodiment, above-mentioned light-guide device 100 is assembled in backlight module.Particularly, backlight module comprises light-guide device 100, blooming piece 200, glue frame 300, light source 400, circuit board 500, shading glue 600 and reflector plate 700.Blooming piece 200 is placed in light guide section 110 upper surface; and be contained in the first protective bulkhead 121, second protective bulkhead 122, receiving space that the 3rd protective bulkhead 123 is formed with light guide section 110; in order to allow blooming piece 200 have certain harmomegathus space, between blooming piece 200 and the first protective bulkhead 121, second protective bulkhead 122, the 3rd protective bulkhead 123, leave certain gap.Reflector plate 700 is arranged at the below of light-guide device 100 and glue frame 300, and is fixed by the lower surface of reflector plate 700 with glue frame 300 by double faced adhesive tape.The incidence surface 130 of contiguous light-guide device 100 arranges light source 400, circuit board 500 is provided with above light source 400, light source 400 and circuit board 500 shading glue 600 are fixed on glue frame 300 and light-guide device 100, namely circuit board 500 is pasted on shading glue 600 upper surface, light source 400 is pasted on shading glue 600 lower surface, one end of shading glue 600 is pasted on the upper surface of glue frame 300 simultaneously, and the other end is pasted on the upper surface of light-guide device 100; Light source 400 can be LED or cold-cathode tube.In one embodiment; with sticking tablet 140, blooming piece 200 and the first protective bulkhead 121, second protective bulkhead 122, the 3rd protective bulkhead 123 can be fixed; namely one end of sticking tablet 140 is pasted on the upper surface of blooming piece 200; the other end is pasted on the upper surface of the first protective bulkhead 121, second protective bulkhead 122 and the 3rd protective bulkhead 123, sticking tablet 140 normally double faced adhesive tape.So, light-guide device 100 and blooming piece 200 just become as a whole.Light-guide device 100 and blooming piece 200 are integrally, be arranged in glue frame 300, first protective bulkhead 121, second protective bulkhead 122 of light-guide device 100, the 3rd protective bulkhead 123 contact with glue frame 300, when glue frame 300 is subject to external force collision or extruding, first protective bulkhead 121, second protective bulkhead 122, the 3rd protective bulkhead 123 pairs of blooming pieces shield, and avoid blooming piece 200 and glue frame 300 touch and cause warpage; Be attached to blooming piece 200 and the first protective bulkhead 121, second protective bulkhead 122, the double faced adhesive tape 140 of the 3rd protective bulkhead 123 upper surface strengthens fixation to blooming piece 200, avoids blooming piece 200 warpage further.
Refer to Fig. 4, Fig. 4 is the schematic cross-section of backlight module in one embodiment of the present invention.Wherein, the 3rd protective bulkhead 123 of light-guide device 100 is provided with groove 124, and groove 124 is arranged at the inwall of the 3rd protective bulkhead 123, and the bottom surface of groove 124 is concordant with the exiting surface of light guide section 110.The cross section of the groove 124 shown in Fig. 3 is rectangle, can be circular arc or other shapes in other embodiment.When blooming piece 200 is assembled on light guide section 110, one end of blooming piece 200 snaps in groove 124, and the height of groove 124 approximates the thickness of blooming piece 200, fixes better to make groove 124 pairs of blooming pieces 200, wherein, the height of groove 124 refers to the size of groove along light direction.In the present embodiment, above-mentioned light-guide device 100 and blooming piece 200 are integrally assembled in backlight module, particularly, backlight module comprises: light-guide device 100, blooming piece 200, glue frame 300, light source 400, circuit board 500, shading glue 600 and reflector plate 700.Reflector plate 700 is arranged at the below of light-guide device 100 and glue frame 300, and is fixed by the lower surface of reflector plate 700 with glue frame 300 by double faced adhesive tape.The incidence surface of contiguous light-guide device 100 arranges light source 400, it is circuit board 500 above light source 400, light source 400 and circuit board 500 shading glue 600 are fixed on glue frame 300 and light-guide device 100, namely circuit board 500 is pasted on shading glue 600 upper surface, light source 400 is pasted on shading glue 600 lower surface, one end of shading glue 600 is pasted on the upper surface of glue frame 300 simultaneously, and the other end is pasted on the upper surface of light-guide device 100; Light source 400 can be LED or cold-cathode tube.So, light-guide device 100 and blooming piece 200 are integrally assembled in glue frame 300, incidence surface 130 is adjacent to light source 400, first protective bulkhead 121, second protective bulkhead 122, the 3rd protective bulkhead 123 contact with glue frame 300, when glue frame 300 is by external force collision or extruding, first protective bulkhead 121, second protective bulkhead 122, the 3rd protective bulkhead 123 pairs of blooming pieces 200 shield, and prevent its warpage; Because blooming piece 200 one end snaps in groove 124, blooming piece 200 is carried out spacing, prevent warpage further.Only on the 3rd protective bulkhead 123 of light-guide device 100, be provided with groove in present embodiment, in other embodiment, only groove 124 can be set on first protective bulkhead 121 and the second protective bulkhead 122 of light-guide device 100; In other embodiment, groove 124 can also be set on the first protective bulkhead 121, second protective bulkhead 122 and the 3rd protective bulkhead 123 simultaneously.
Refer to Fig. 5, Fig. 5 is the schematic cross-section of backlight module in an embodiment of the invention.Wherein, 3rd protective bulkhead 123 of light-guide device 100 is provided with shielding plate 125, shielding plate 125 is arranged at the upper surface of the 3rd protective bulkhead 123, and extend to light guide section 110 side, the height of the 3rd protective bulkhead 123 is set to the thickness of blooming piece 200 suitable, shielding plate 125 can be one or be separated from each other multiple; Blooming piece 200 is arranged at the top of light guide section 110, and its one end is arranged at the below of shielding plate 125, and shielding plate 125 plays protection and fixation to it.In the present embodiment, above-mentioned light-guide device 100 and blooming piece 200 are integrally assembled in backlight module, particularly, backlight module comprises: light-guide device 100, blooming piece 200, glue frame 300, light source 400, circuit board 500, shading glue 600 and reflector plate 700.Reflector plate 700 is arranged at the below of light-guide device 100 and glue frame 300, and is fixed by the lower surface of reflector plate 700 with glue frame 300 by double faced adhesive tape.The incidence surface of contiguous light-guide device 100 arranges light source 400, it is circuit board 500 above light source 400, light source 400 and circuit board 500 shading glue 600 are fixed on glue frame 300 and light-guide device 100, namely circuit board 500 is pasted on shading glue 600 upper surface, light source 400 is pasted on shading glue 600 lower surface, one end of shading glue 600 is pasted on the upper surface of glue frame 300 simultaneously, and the other end is pasted on the upper surface of light-guide device 100; Light source 400 can be LED or cold-cathode tube.So, light-guide device 100 and blooming piece 200 are integrally assembled in glue frame 300, incidence surface 130 is adjacent to light source 400, first protective bulkhead 121, second protective bulkhead 122, the 3rd protective bulkhead 123 contact with glue frame 300, when glue frame 300 is by external force collision or extruding, first protective bulkhead 121, second protective bulkhead 122, the 3rd protective bulkhead 123 pairs of blooming pieces 200 shield, and prevent its warpage; Because shielding plate 125 pairs of blooming pieces 200 are done further spacing, thus prevent the generation of warpage further.In the present embodiment, be only provided with shielding plate 125 at the upper surface of the 3rd protective bulkhead 123, but, in other embodiment, only shielding plate 125 can also be set at the first protective bulkhead 121 and the second protective bulkhead 122 upper surface; In other embodiment, shielding plate 125 can also be set simultaneously at the upper surface of the first protective bulkhead 121, second protective bulkhead 122 and the 3rd protective bulkhead 123 simultaneously.
In one embodiment, shielding plate 125 and the first protective bulkhead 121, second protective bulkhead 122, the 3rd protective bulkhead 123 can be set to the integral structure that can not be split.In one embodiment; shielding plate 125 can be set to independently parts; now; multiple fixture block can be set on shielding plate 125; and draw-in groove corresponding to multiple and described fixture block is set at the upper surface of the first protective bulkhead 121, second protective bulkhead 122, the 3rd protective bulkhead 123; during assembling, both are interlocked and shielding plate 125 can be fixed, thus to blooming piece 200 protection and position-limiting action.
In an embodiment of the invention, light guide section 110 and the first protective bulkhead 121, second protective bulkhead 122, the 3rd protective bulkhead 123 are the integral structures that can not be split.
Above-described embodiment, does not form limiting the scope of the present invention.The amendment done within any spirit at above-mentioned embodiment and principle, equivalently to replace and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a light-guide device, it is characterized in that, comprise light guide section, first protective bulkhead, second protective bulkhead and the 3rd protective bulkhead, described light guide section has the first side, second side, 3rd side and the 4th side, described 4th side is the incidence surface of described light guide section, described first protective bulkhead, described second protective bulkhead and described 3rd protective bulkhead are arranged at described first side respectively, described second side and described 3rd side, described first protective bulkhead and described second protective bulkhead are oppositely arranged, described 3rd protective bulkhead is positioned at the side of the described incidence surface away from described light guide section, described first protective bulkhead, described second protective bulkhead, described 3rd protective bulkhead and described light guide section form a receiving space.
2. light-guide device according to claim 1, is characterized in that, described 3rd protective bulkhead has a groove, and described groove is arranged at the inwall of described 3rd protective bulkhead, and the bottom surface of described groove is concordant with the exiting surface of described light guide section.
3. light-guide device according to claim 1; it is characterized in that; described first protective bulkhead and described second protective bulkhead all have a groove, and described groove is arranged at the inwall of described first protective bulkhead and described second protective bulkhead, and the bottom surface of described groove is concordant with the exiting surface of described light guide section.
4. light-guide device according to claim 1; it is characterized in that; described first protective bulkhead, described second protective bulkhead and described 3rd protective bulkhead all have a groove; described groove is arranged at the inwall of described first protective bulkhead, described second protective bulkhead and the 3rd protective bulkhead, and the bottom surface of described groove is concordant with the exiting surface of described light guide section.
5. light-guide device according to claim 1, is characterized in that, described light-guide device also comprises multiple shielding plate, and described multiple shielding plate is arranged at the upper surface of described 3rd protective bulkhead separated from one anotherly and extends to described light guide section side.
6. light-guide device according to claim 1; it is characterized in that; described light-guide device also comprises multiple shielding plate, and described multiple shielding plate is arranged at the upper surface of described first protective bulkhead and described second protective bulkhead separated from one anotherly, and described shielding plate extends to described light guide section side.
7. light-guide device according to claim 6, is characterized in that, described shielding plate is also arranged at the upper surface of described 3rd protective bulkhead.
8. the light-guide device according to any one of claim 1 to 7, is characterized in that, described light guide section, described first protective bulkhead, described second protective bulkhead and described 3rd protective bulkhead are the integral structure that can not be split.
9. a backlight module, comprise blooming piece, glue frame, light source, circuit board, shading glue and reflector plate, it is characterized in that, also comprise the light-guide device described in any one of claim 1 to 7, described blooming piece is contained in the described receiving space of described light-guide device, described light-guide device is fixed in described glue frame, described reflector plate is arranged at the below of described light-guide device and described glue frame, and described reflector plate is fixed on the lower surface of described glue frame, contiguous described incidence surface arranges described light source, circuit board is provided with above described light source, described light source and the described shading glue of described circuit board are fixed in described glue frame.
10. backlight module according to claim 9; it is characterized in that; described backlight module also comprises a sticking tablet, and described sticking tablet one end is pasted on the upper surface of described first protective bulkhead, the second protective bulkhead and/or the 3rd protective bulkhead, and the other end is pasted on the upper surface of described blooming piece.
CN201510433989.XA 2015-07-22 2015-07-22 Light guide element and backlight module Pending CN105090892A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201510433989.XA CN105090892A (en) 2015-07-22 2015-07-22 Light guide element and backlight module

Publications (1)

Publication Number Publication Date
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CN106444154A (en) * 2016-11-16 2017-02-22 武汉华星光电技术有限公司 Backlight module and liquid crystal display device

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CN104375324A (en) * 2014-11-17 2015-02-25 深圳市华星光电技术有限公司 Backlight module and display with the same
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CN105650542A (en) * 2016-01-04 2016-06-08 京东方光科技有限公司 Backlight module and display device
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CN106444154A (en) * 2016-11-16 2017-02-22 武汉华星光电技术有限公司 Backlight module and liquid crystal display device

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