CN101696780B - Backlight module, plat panel display and design method of positioning element of flat panel display - Google Patents
Backlight module, plat panel display and design method of positioning element of flat panel display Download PDFInfo
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- CN101696780B CN101696780B CN2009101738835A CN200910173883A CN101696780B CN 101696780 B CN101696780 B CN 101696780B CN 2009101738835 A CN2009101738835 A CN 2009101738835A CN 200910173883 A CN200910173883 A CN 200910173883A CN 101696780 B CN101696780 B CN 101696780B
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Abstract
The invention discloses a backlight module which comprises a light guide plate, a plurality of light emitting elements and a positioning element. The light guide plate comprises a light incoming side and an upper surface which intersects at the light incoming side; the light emitting elements have light emitting angles and are arranged in the range of the light emitting angles and respectively project light to the light incoming side, and the light forms a plurality of dark zones at the position of the light guide plate beyond the range of the light emitting angles; and the positioning element comprises a plurality of protruding parts which protrude to the upper surface and respectively support against the dark zones. The invention also discloses a flat panel display and a design method of a positioning element of the same.
Description
Technical field
The present invention relates to a kind of backlight module, relate in particular to a kind of method for designing that promotes backlight module, flat-panel screens and the setting element thereof of briliancy uniformity coefficient.
Background technology
The progressive fast and evolution along with display technology, traditional cathode-ray tube (CRT) (cathode ray tube, CRT) because of exist space utilization not good with consume problem such as a large amount of energy, be eliminated gradually, the substitute is light, thin, short, little LCD (liquid crystal display, LCD).And since LCD possess high display quality is arranged, advantages such as low energy expenditure and radiationless line, make LCD be applied to mobile computer, computer screen, mobile phone, individual number in large quantities among communication, information or the consumption electronic products such as assistant (PDA), digital camera, digital camera and LCD TV.
LCD mainly is to utilize liquid crystal panel to show, because liquid crystal panel belongs to the display panel of non-self-luminosity, therefore must supply the light source that briliancy is sufficient and be evenly distributed with backlight module, just can make the normal show image of liquid crystal panel.As shown in Figure 1, for a kind of with the existing backlight modular structure of light emitting diode as light source, it is that light guide plate A2 and a plurality of light emitting diode A3 are set in the housing A1 that metal material is made, wherein, a plurality of light emitting diode A3 are close proximity to light guide plate A2, light L1, L2, L3 that light emitting diode A3 is penetrated directly enter light guide plate A2, and clamp and lightguide plate fixing A2 in friction tight mode with the fixed frame A5 that plastic material or metal material are made, to guarantee stability of light source.Under desirable state, light L1 carries out total reflection in light guide plate A2 inside because of the otherness of the refractive index of air and light guide plate A2.Yet, plastics, metal or other mechanism's material are too small for the refractive index difference of light guide plate A2, cause the total reflection of light L2, L3 destroyed, spill and make light L2 penetrate refraction by surface of contact, and produce tangible focus (hot spot) along the arrangement position of a plurality of light emitting diode A3, in the time of also can causing light L3 via the surface of contact of fixed frame A5 and light guide plate A2, can produce irregular reflection and cause luminance nonuniformity, and be shown in form in the visible area in light leak or bright band.
Therefore, how the surface of contact of fixed frame and light guide plate destroys the problem of light total reflection, avoids producing in visible area the phenomenon of luminance nonuniformity, promotes the quality of product whereby, desires most ardently the problem of improvement for present inventor and those skilled in the art.
Summary of the invention
The invention provides the method for designing of a kind of backlight module, flat-panel screens and setting element thereof, to overcome prior art produces the phenomenon of luminance nonuniformity in visible area defective.
The present invention proposes a kind of backlight module, comprises: light guide plate comprises incidence surface and upper surface intersects at incidence surface; A plurality of light-emitting components have lighting angle respectively, and a plurality of light-emitting components are in the scope of a plurality of lighting angles, and respectively towards the incidence surface throw light, light forms a plurality of dark spaces in the extraneous light guide plate place of lighting angle; And setting element, comprising a plurality of protuberances, its protrusion direction is towards upper surface, and is held in a plurality of dark spaces respectively.
The present invention also proposes a kind of backlight module, comprises: light guide plate comprises incidence surface and upper surface intersects at incidence surface; A plurality of light-emitting components, respectively towards the incidence surface throw light, light has maximum briliancy, and after treating that light enters light guide plate inside, can be in inner clear zone and a plurality of dark space of forming of light guide plate, the briliancy in clear zone is higher than predetermined briliancy, and the briliancy of a plurality of dark spaces then is less than or equal to predetermined briliancy, and predetermined briliancy is less than maximum briliancy; And setting element, comprising a plurality of protuberances, its protrusion direction is towards upper surface, and supports a plurality of dark spaces respectively.
The present invention also proposes a kind of backlight module, comprises: light guide plate comprises incidence surface and upper surface intersects at incidence surface; A plurality of light-emitting components, the incidence surface towards light guide plate throws a light respectively; Medium is positioned on the upper surface of light guide plate, and also at incidence surface and light between the position at the angle of total reflection place in light guide plate; And setting element, dispose corresponding to upper surface.
The present invention also proposes a kind of flat-panel screens, comprises: above-mentioned backlight module; Display panel corresponding to the configuration of the upper surface of light guide plate, and is carried by setting element; And preceding frame, corresponding to backlight module and display panel setting, and have the demonstration opening, in order to expose the part of display panel.
The present invention also proposes a kind of method for designing of setting element of backlight module, comprises the following step: light guide plate is provided, comprises incidence surface and upper surface intersects at incidence surface; Provide a plurality of light-emitting components, respectively towards the incidence surface throw light; The emulation setting element is provided, comprises a plurality of teats, its projected direction is towards upper surface, and is held in a plurality of positions that support of upper surface respectively; Adjust the position of emulation setting element or a plurality of teats, promptly change a plurality of positions that support of emulation setting element, can penetrate from light guide plate equably until light, and can not produce till the phenomenon of luminance nonuniformity; A plurality of the support positions of record when light guide plate can not produce the phenomenon of luminance nonuniformity, and to define a plurality of positions that support be a plurality of dark spaces; And setting element is provided, and comprising a plurality of protuberances, its protrusion direction is towards upper surface, and is held in a plurality of dark spaces respectively.
The present invention is with the lighting angle or the surperficial thereon position, dark space of briliancy decision light guide plate of light-emitting component, and support the dark space with setting element, or support the appropriate position of position outside the angle of total reflection with the location, make the surface of contact of setting element and light guide plate can not influence the light reflection, also can not destroy the total reflection of light, it is too small for the refractive index difference of light guide plate because of the material of setting element effectively to solve existing structure, thereby the problem of destruction light total reflection, and then the quality of lifting flat-panel screens.
Relevant preferred embodiment of the present invention and effect thereof, cooperate now graphic explanation as after.
Description of drawings
Fig. 1 is the synoptic diagram of existing backlight module;
Fig. 2 is the local top view of backlight module of the present invention;
Fig. 3 A is that first and second embodiment of the present invention is in the synoptic diagram of the A-A of the 2nd figure section;
Fig. 3 B is that first and second embodiment of the present invention is in the synoptic diagram of the B-B of the 2nd figure section;
Fig. 4 A is the optical characteristics synoptic diagram of the backlight module of first embodiment of the invention;
Fig. 4 B is the optical characteristics synoptic diagram of the backlight module of second embodiment of the invention;
Fig. 5 A is the synoptic diagram of third embodiment of the invention in the A-A of Fig. 2 section;
Fig. 5 B is the synoptic diagram of third embodiment of the invention in the B-B of Fig. 2 section.
Wherein, Reference numeral:
A1: housing A2: light guide plate
A3: light emitting diode A5: fixed frame
L1/L2/L3/L4/L5: light 1: backlight module
11: light guide plate 11a: incidence surface
11b: upper surface 11c: neighboring area
11d: zone line 11e: support the zone
11f: total reflection zone 111: dark space
112: clear zone 12: light-emitting component
13: medium 14: setting element
141: body 142: protuberance
16: backboard 161: the bottom plate body
162: side plate body 17: reflector plate
18: optical diaphragm group 2: flat-panel screens
21: display panel 22: preceding frame
3: the position alpha of the angle of total reflection: lighting angle
S: surface of contact
Embodiment
Fig. 2 and Fig. 3 A, Fig. 3 B and Fig. 4 A illustrate the first embodiment of the present invention.Backlight module 1 comprises: light guide plate 11, a plurality of light-emitting component 12, setting element 14.Fig. 3 A is the A-A sectional view of Fig. 2, and Fig. 3 B is the B-B sectional view of Fig. 2, and Fig. 4 A then is the optical appearance synoptic diagram of present embodiment.Wherein, with the technical characterictic that shows the application, Fig. 2 only keeps light guide plate 11 and light-emitting component 12 for convenience of description, and omits other element.
A plurality of light-emitting components 12, each light-emitting component 12 preferably has identical lighting angle α, lighting angle α is meant the light emitting region of light-emitting component 12 at the upper surface 11b that is parallel to light guide plate 11, a plurality of light-emitting components 12 are in the scope of a plurality of lighting angle α, respectively towards the incidence surface 11a of light guide plate 11 throw light L4, light L4 forms a plurality of dark spaces 111 in extraneous light guide plate 11 places of lighting angle α, and a plurality of light-emitting components 12 are staggered with a plurality of dark spaces 111, also be light-emitting component 12 between adjacent two dark spaces 111, or dark space 111 is between adjacent two light-emitting components 12.
Setting element 14, be arranged on the neighboring area 11c of light guide plate 11 near the upper surface 11b of incidence surface 11a side, at this, setting element 14 has the body 141 of strip composition or frame shape, and dispose a plurality of protuberances 142 in 12 the orientation in body 141 along light-emitting component, and a plurality of protuberance 142 protrusion directions are towards upper surface 11b, and be held in respectively on a plurality of dark spaces 111 of light guide plate 11 (as Fig. 2 and Fig. 3 B), and can not be held in zone (as Fig. 2 and Fig. 3 A) beyond the dark space 111 of light guide plate 11.At this, setting element 14 can be made by plastics, metal or other mechanism's material, and it preferably can be the glue frame, but the present invention is non-as limit.
In the present embodiment, backlight module 1 more can comprise: backboard 16, reflector plate 17, optical diaphragm group 18.Wherein, backboard 16 has general rectangular bottom plate body 161 and side plate body 162, in order to ccontaining light guide plate 11, a plurality of light-emitting component 12 and setting element 14, and between backboard 16 and light guide plate 11 configuration reflector plate 17, and optical diaphragm group 18 is corresponding to the zone line 11d of the upper surface 11b of light guide plate 11 configuration, and setting element 14 can be around optical diaphragm group 18.In other embodiments, but light guide plate 11 near the one side coating reflection layer of backboard 16 to replace reflector plate 17.
Because the light L4 of light-emitting component 12 forms a plurality of dark spaces 111 at extraneous light guide plate 11 places of lighting angle α, and a plurality of protuberances 142 of setting element 14 are held on a plurality of dark spaces 111, therefore, the surface of contact S of a plurality of protuberances 142 and light guide plate 11 is outside the scope of the lighting angle α of light-emitting component 12, can prevent that light L4 is destroyed in the total reflection at its surface of contact S place, and the luminance nonuniformity that can avoid light L4 irregular reflection to be caused, and problem such as focus.
Light-emitting component 12 used in the present invention can be a kind of light emitting diode (LED), and comprises the light emitting diode of white light, ruddiness, green glow, blue light or other look.The employed light emitting diode of present embodiment, its optical characteristics is shown in Fig. 4 A.
When 0 ° of light L4 emergence angle, have maximum relative briliancy, after normalization, be defined as 1.0 dusts (a.u.), when emergence angle is between 80 ° and 90 °, then almost there is not light L4 ejaculation, so the relative briliancy after normalization levels off to 0 dust.
In theory, the protuberance 142 of setting element 14 should be arranged on corresponding to the position between 80 ° and 90 ° of the light L4 emergence angle, yet, be arranged on corresponding to the position between 54 ° and 66 ° of the light L4 emergence angle protuberance 142 preferable if further contemplate the assembling and the fixation problem of setting element 14 and light guide plate 11 again.The scope of lighting angle α that also is each light-emitting component 12 is between 54 ° and 66 °, and wherein being 60 ° with lighting angle α again is the best, but the present invention is non-as limit.Wherein, the lighting angle α of indication of the present invention is not the actual angle of the emitted light L4 of light-emitting component 12, and is meant the critical value of the ejaculation angle of acceptable light L4, and it usually can be relevant with the intensity and the predetermined briliancy of mechanism.In other embodiments, also can be scheduled to briliancy as implementing point of penetration of the present invention.
See also shown in Fig. 2, Fig. 3 A, Fig. 3 B and Fig. 4 B, illustrate the second embodiment of the present invention equally.Fig. 3 A is the A-A sectional view of Fig. 2, and Fig. 3 B is the B-B sectional view of Fig. 2, and Fig. 4 B then is the optical appearance synoptic diagram of present embodiment.Present embodiment determines the position that a plurality of protuberances 142 are supported with the briliancy of 12 throw light L4 of a plurality of light-emitting components.In the present embodiment, towards the incidence surface 11a of light guide plate 11 throw light L4, the light L4 that each light-emitting component 12 is throwed preferably has identical maximum briliancy Kmax to a plurality of light-emitting components 12, is defined as 1.0 dusts (a.u.) after normalization respectively.The light L4 that is throwed when a plurality of light-emitting components 12, after entering light guide plate 11 inside, the zone that its briliancy K is lower than predetermined briliancy Kp promptly defines a plurality of dark spaces 111 of formation, the zone that briliancy K is higher than predetermined briliancy Kp then defines formation clear zone 112, and a plurality of light-emitting components 12 are staggered with a plurality of dark spaces 111, also be that light-emitting component 12 is between adjacent two dark spaces 111, or dark space 111 is between adjacent two light-emitting components 12, a plurality of protuberances 142 with setting element 14 are held in respectively on a plurality of dark spaces 111 of light guide plate 11 again, get final product lightguide plate fixing 11 on backboard 16.At this, the maximum briliancy Kmax of the light L4 that predetermined briliancy Kp is throwed less than light-emitting component 12, and the scope of the ratio of predetermined briliancy Kp and maximum briliancy Kmax is between 0.75 and 0.25, promptly the scope of predetermined briliancy Kp is between 0.75 dust and 0.25 dust, be 0.5 to be the best with the ratio of predetermined briliancy Kp and maximum briliancy Kmax again wherein, promptly the value of predetermined briliancy Kp is 0.5 dust, but the present invention is non-as limit.
See also shown in Fig. 5 A and Fig. 5 B, be the third embodiment of the present invention, Fig. 5 A is the A-A sectional view of Fig. 2, and Fig. 5 B is the B-B sectional view of Fig. 2.Present embodiment determines the position that a plurality of protuberances 142 of setting elements 14 are supported with the position 3 of the angle of total reflection of light L5.In the present embodiment, a plurality of light-emitting components 12 are respectively towards the incidence surface 11a of light guide plate 11 throw light L5, and light guide plate 11 disposes medium 13 on upper surface 11b, and but it is between the position 3 of the angle of total reflection of light L5 in light guide plate 11 of incidence surface 11a and warp coating reflection layer or reflector plate 17 primary events, medium 13 can be air or transparent filling material, for example: silica gel, its refractive index preferably can be 1, the ranges of indices of refraction of light guide plate 11 then can be between 1.34 and 1.60, be 1.49 to be the best with the refractive index of light guide plate again wherein, but the present invention is non-as limit.
14 neighboring area 11c configurations of setting element corresponding to the upper surface 11b of light guide plate 11, and the protuberance 142 of setting element 14 is held in the supporting on the regional 11e of upper surface 11b of medium 13 sides, be that it supports the appropriate position of position outside the position 3 of the angle of total reflection, support the part that regional 11e is neighboring area 11c, and between zone line 11d or optical diaphragm group 18 and medium 13.Therefore, setting element 14 can not influence light L5 reflection with the surface of contact S of light guide plate 11, can not destroy the total reflection of light L5 yet.
Secondly, the protuberance 142 of setting element 14 also can support outside the total reflection zone 11f of the light L4 that self-emission device 12 directly penetrates.Because with the foundation of light L4,, and support regional 11e and also be the part of neighboring area 11c so protuberance 142 at the regional 11e of supporting of upper surface 11b, is understood between medium 13 and light-emitting component 12 as design.
In addition, the setting element 14 of present embodiment can be identical with the first two embodiment, on the neighboring area 1c of the upper surface 11b that supports respectively in light guide plate 11 with a plurality of protuberances 142, or can directly support on the 11c of the neighboring area of surperficial 11b with the strip protuberance 142 on the body 141, shown in Fig. 5 A, the bearing of trend of strip protuberance 142 herein is meant the direction that is parallel to light-emitting component 12 orientations.
In various embodiments of the present invention, light L4, L5 are meant the light by the centre place projection of light-emitting component 12, and but light L4 is meant still the light without coating reflection layer or reflector plate 17 reflections, but light L5 then refers to the light through coating reflection layer or reflector plate 17 primary events.
The method for designing of the setting element of backlight module 1 comprises the following step:
Step 1: light guide plate 11 is provided, comprises incidence surface 11a and upper surface 11b.
Step 2: provide a plurality of light-emitting components 12, respectively towards incidence surface 11a throw light.
Step 3: the emulation setting element is provided, comprises a plurality of teats, its projected direction is towards upper surface 11b, and is held in a plurality of positions that support of upper surface 11b respectively.
The emulation setting element has the body of strip composition or frame shape, and can be extended with a plurality of teats on body according to the actual design demand, and wherein, a plurality of teat protrusion directions are towards upper surface 11b.
Step 4: adjust the position of emulation setting element or a plurality of teats, promptly change a plurality of positions that support of emulation setting element, can penetrate from light guide plate 11 equably until light, and can not produce till the phenomenon of luminance nonuniformity.
Step 5: a plurality of the support positions of record when light guide plate 11 can not produce the phenomenon of luminance nonuniformity, and to define a plurality of positions that support be a plurality of dark spaces.
Mobile emulation setting element or a plurality of teat support the position of upper surface 11b, make the surface of contact S of itself and light guide plate 11 can not influence the light reflection, also can not destroy the total reflection of light, make light to penetrate from light guide plate 11 equably.When light guide plate 11 can not produce the phenomenon of luminance nonuniformity, note down the position that supports of emulation setting element or a plurality of teats, and general's a plurality of location definitions that support at this moment are a plurality of dark spaces 111.
In this step, emulation setting element or a plurality of teat can move outside the scope of the lighting angle of light-emitting component 12, or move towards the lower zone of light briliancy, or are that move position outside the angle of total reflection.
Step 6: setting element 14 is provided, comprises a plurality of protuberances 142, its protrusion direction is towards upper surface 11b, and is held in a plurality of dark spaces 111 respectively.
The structure of setting element 14 is identical with the structure of aforementioned emulation setting element, and has a body 141 of strip or frame shape, and can on body, be extended with a plurality of protuberances 142 according to the actual design demand, wherein, a plurality of protuberance 142 protrusion directions are towards upper surface 11b, and are held in a plurality of dark spaces 111 on the light guide plate 11 respectively.At this, setting element 14 can be made by plastics, metal or other mechanism's material, and it preferably can be the glue frame, but the present invention is non-as limit.
The present invention is with the lighting angle or the surperficial thereon position, dark space of briliancy decision light guide plate of light-emitting component, and support the dark space with setting element, or support the appropriate position of position outside the angle of total reflection with the location, make the surface of contact of setting element and light guide plate can not influence the light reflection, also can not destroy the total reflection of light, it is too small for the refractive index difference of light guide plate because of the material of setting element effectively to solve existing structure, thereby the problem of destruction light total reflection, and then the quality of lifting flat-panel screens.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (7)
1. a backlight module is characterized in that, comprises:
One light guide plate comprises an incidence surface and a upper surface intersects at this incidence surface;
A plurality of light-emitting components have a lighting angle respectively, and those light-emitting components throw a light towards this incidence surface respectively in the scope of those lighting angles, and those light form a plurality of dark spaces in extraneous this light guide plate place of those lighting angles; And
One setting element comprises a plurality of protuberances, and the protrusion direction of those protuberances is towards this upper surface, and is held in those dark spaces respectively.
2. backlight module according to claim 1 is characterized in that the scope of those lighting angles is between 54 ° and 66 °.
3. a backlight module is characterized in that, comprises:
One light guide plate comprises an incidence surface and a upper surface intersects at this incidence surface;
A plurality of light-emitting components, throw a light towards this incidence surface respectively, those light have a maximum briliancy, and after treating that those light enter this light guide plate inside, can be in an inner clear zone and a plurality of dark space of forming of this light guide plate, the briliancy in this clear zone is higher than a predetermined briliancy, and the briliancy of those dark spaces is less than or equal to this predetermined briliancy, and should be scheduled to briliancy less than this maximum briliancy; And
One setting element comprises a plurality of protuberances, and the protrusion direction of those protuberances is towards this upper surface, and supports those dark spaces respectively.
4. backlight module according to claim 3 is characterized in that, the scope of the ratio of this predetermined briliancy and this maximum briliancy is between 0.75 and 0.25.
5. a flat-panel screens is characterized in that, comprises:
The described backlight module of in one claim 1 to 4 each;
One display panel corresponding to this upper surface configuration of this light guide plate, and is carried by this setting element; And
Frame before one is provided with corresponding to this backlight module and this display panel, and has a demonstration opening, in order to expose the part of this display panel.
6. flat-panel screens according to claim 5 is characterized in that, this backlight module comprises in addition:
One backboard is in order to ccontaining this light guide plate, those light-emitting components and this setting element;
One reflector plate is disposed between this backboard and this light guide plate; And
One optical diaphragm group, corresponding to this upper surface configuration of this light guide plate, and this setting element is around this optical diaphragm group.
7. the manufacture method of the setting element of a backlight module is characterized in that, comprises the following step:
One light guide plate is provided, comprises an incidence surface and a upper surface intersects at this incidence surface;
A plurality of light-emitting components are provided, throw a light towards this incidence surface respectively;
One emulation setting element is provided, comprises a plurality of teats, the projected direction of those teats is towards this upper surface, and is held in a plurality of positions that support of this upper surface respectively;
Adjust the position of this emulation setting element or those teats, those that promptly change this emulation setting element support the position, can penetrate from this light guide plate equably until those light, and can not produce till the phenomenon of luminance nonuniformity;
Record those when this light guide plate can not produce the phenomenon of luminance nonuniformity support the position, and defining those, to support the position be a plurality of dark spaces; And
One setting element is provided, comprises a plurality of protuberances, the protrusion direction of those protuberances is towards this upper surface, and is held in those dark spaces respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101738835A CN101696780B (en) | 2009-09-18 | 2009-09-18 | Backlight module, plat panel display and design method of positioning element of flat panel display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101738835A CN101696780B (en) | 2009-09-18 | 2009-09-18 | Backlight module, plat panel display and design method of positioning element of flat panel display |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010513941A Division CN102042541B (en) | 2009-09-18 | 2009-09-18 | Backlight module and flat panel display |
Publications (2)
| Publication Number | Publication Date |
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| CN101696780A CN101696780A (en) | 2010-04-21 |
| CN101696780B true CN101696780B (en) | 2011-11-09 |
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| CN2009101738835A Expired - Fee Related CN101696780B (en) | 2009-09-18 | 2009-09-18 | Backlight module, plat panel display and design method of positioning element of flat panel display |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9010980B2 (en) | 2012-04-28 | 2015-04-21 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Light guide plate and backlight module containing same |
| CN102661573B (en) * | 2012-04-28 | 2016-02-24 | 深圳市华星光电技术有限公司 | Light guide plate and there is the backlight module of this light guide plate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201017141Y (en) * | 2006-12-18 | 2008-02-06 | 科桥电子股份有限公司 | Light source device of backlight module |
| CN201063087Y (en) * | 2007-06-19 | 2008-05-21 | 中华映管股份有限公司 | Backlight module unit |
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2009
- 2009-09-18 CN CN2009101738835A patent/CN101696780B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201017141Y (en) * | 2006-12-18 | 2008-02-06 | 科桥电子股份有限公司 | Light source device of backlight module |
| CN201063087Y (en) * | 2007-06-19 | 2008-05-21 | 中华映管股份有限公司 | Backlight module unit |
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