CN101592820B - Backlight module and liquid crystal display applying same - Google Patents

Backlight module and liquid crystal display applying same Download PDF

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Publication number
CN101592820B
CN101592820B CN 200810108585 CN200810108585A CN101592820B CN 101592820 B CN101592820 B CN 101592820B CN 200810108585 CN200810108585 CN 200810108585 CN 200810108585 A CN200810108585 A CN 200810108585A CN 101592820 B CN101592820 B CN 101592820B
Authority
CN
China
Prior art keywords
light source
backlight module
side plate
backboard
framework
Prior art date
Application number
CN 200810108585
Other languages
Chinese (zh)
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CN101592820A (en
Inventor
潘煜曼
Original Assignee
群创光电股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 群创光电股份有限公司 filed Critical 群创光电股份有限公司
Priority to CN 200810108585 priority Critical patent/CN101592820B/en
Publication of CN101592820A publication Critical patent/CN101592820A/en
Application granted granted Critical
Publication of CN101592820B publication Critical patent/CN101592820B/en

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Abstract

The invention discloses a backlight module and a liquid crystal display applying same. The liquid crystal display comprises the backlight module and a liquid crystal display panel; the backlight module comprises a framework, a light guiding plate, a light source carrier and at least one light source element; the framework is provided with a first positioning structure; the light guiding plate is arranged in the framework and surrounded by the same and is provided with a light emitting surface and a light incident surface abutted on the light emitting surface; the light emitting surface and the light injecting surface are exposed by the framework; the light source carrier is provided with at least one second positioning structure which can be combined with the first positioning structure to enable the light source carrier to cover the light incident surface; the light source element is fixed on the light source carrier and positioned besides the light injecting surface; and the liquid crystal display panel is arranged on the light emitting surface of the backlight module.

Description

Backlight module and use the liquid crystal indicator of this backlight module

Technical field

The present invention relates to a kind of light source module and use the display device of this light source module, and particularly relevant for a kind of backlight module (backlight module) and use the liquid crystal indicator (liquidcrystal display, LCD) of this backlight module.

Background technology

Progress along with modern Vision Technology, liquid crystal indicator has been used in mobile phone (mobilephone), notebook computer (notebook personal computer), PC (personal computer in large quantities, PC) and on the display screen of the consumption electronic products such as personal digital assistant (personal digital assistant, PDA).Yet, because the display panels (LCD panel) of liquid crystal indicator itself does not have luminous function, therefore need to be in display panels below configuration backlight module providing display panels needed light source, and then make display panels reach the effect of demonstration.

Fig. 1 is a kind of partial cutaway diagram of known backlight module.Please refer to Fig. 1, the light source component 110 of known backlight module 100 is to be disposed at by light guide plate 120, and by a reflector plate 130, light source component 110 is coated, to improve the light source utilization factor of light source component 110.At this, light source component 110 is to use light emitting diode (light emitting diode, LED) be example, but in known technology, light source component 110 also have employing cathode fluorescent tube (cold cathode fluorescent lamp, CCFL) person.Then, then configure a L shaped backboard 140 outside reflector plate 130, to provide light source component 110 preferred heat radiation approach.Then, then with the relative position of fixing above-mentioned each members of a glue frame 150.

Yet, along with the requirement of liquid crystal indicator for brightness constantly promotes, also be inclined in design with larger electric current and come driving light source element 110 to obtain more high brightness.Along with the increase of drive current, the light source component 110 also easier luminescence efficiency that causes because heat radiation is difficult for descends, or even damages.At this moment, if will change light source component 110, must with all first dismountings of glue frame 150, backboard 140 and reflector plate 130, just there be way to change light source component 110.In other words, in known backlight module 100, whole backlight module 100 all must be disassembled and can be keeped in repair light source component 110, need expend many man-hours and cost.In addition, in the process of disassembling whole backlight module 100 and re-assemblying, also possible scratch reflector plate 130 and light guide plate 120 optical elements such as grade accidentally, cause the optical characteristics of backlight module 100 to descend.Therefore, how to increase assembling and maintenance backlight module convenience, guarantee possess preferred optical characteristics and reduce costs after backlight module assembling and maintenance, become the problem that needs to be resolved hurrily.

Summary of the invention

The invention provides a kind of backlight module, can solve that the assembling of known backlight module and maintenance are difficult for, may damage the shortcoming that the optical characteristics of backlight module and assembling and maintenance expend man-hour and cause cost to improve in assembling and maintenance process.

The present invention separately provides a kind of liquid crystal indicator, and backlight module assembling and the maintenance that can solve known liquid crystal indicator is difficult for, may damage the shortcoming that the optical characteristics of backlight module and assembling and maintenance expend man-hour and cause cost to improve in assembling and maintenance process.

Backlight module of the present invention comprises a framework, a light guide plate, a light source carrier and at least one light source component.Framework has at least one the first location structure.Light guide plate be disposed in framework and by framework institute around, and have an exiting surface and an incidence surface in abutting connection with exiting surface.Framework exposes exiting surface and incidence surface.Light source carrier has at least one the second location structure.The second location structure is in order to be combined with the first location structure, so that light source carrier covers incidence surface.Light source component is fixed on light source carrier, and is positioned at by incidence surface.

Liquid crystal indicator of the present invention comprises aforesaid backlight module and a display panels.Display panels is disposed at the exiting surface of backlight module.

In an embodiment of aforesaid liquid crystal indicator and backlight module, the second location structure is along being combined with the first location structure perpendicular to the direction of incidence surface in fact.

In an embodiment of aforesaid liquid crystal indicator and backlight module, framework comprises a glue frame and a backboard, and glue frame and light guide plate are disposed on backboard, and the glue frame is around light guide plate.In addition, the glue frame for example has aforesaid the first location structure, or backboard can have aforesaid the first location structure.In addition, light source carrier can comprise mutually perpendicular one main support plate and side plate.Wherein, main support plate is parallel in fact incidence surface, and side plate is as the second location structure.The first location structure is a jack, and side plate is inserted in via jack between light guide plate and backboard.In addition, backboard can have more a guiding rib, and side plate has a guide channel of corresponding guiding rib, and side plate is to be inserted between light guide plate and backboard along the bearing of trend of guiding rib.Perhaps, backboard can have more a guide channel, and side plate has a guiding rib of corresponding guide channel, and side plate is to be inserted between light guide plate and backboard along the bearing of trend of guiding rib.Moreover backboard can have more at least one salient point, and side plate has at least one groove of corresponding salient point, and the combination of side plate by salient point and groove is positioned between light guide plate and backboard.Perhaps, backboard can have more at least one groove, and side plate has at least one salient point of respective slot, and the combination of side plate by salient point and groove is positioned between light guide plate and backboard.

In an embodiment of aforesaid liquid crystal indicator and backlight module, light source component comprises at least one circuit board and a plurality of light emitting diode.Circuit board is fixed on light source carrier.Light emitting diode is disposed on circuit board and with circuit board and is electrically connected, and between circuit board and incidence surface.In addition, circuit board is compound substance printed circuit board (PCB) (composite material printed circuit board, compositematerial PCB), bendable printed circuit board (PCB) (flexible PCB) or metal-core printed circuit board (metalcore PCB, MCPCB).In addition, light source carrier can have a line opening, and circuit board passes line opening.

In an embodiment of aforesaid liquid crystal indicator and backlight module, light source component comprises at least one cathode fluorescent tube and a power lead.Power lead is electrically connected to cathode fluorescent tube.In addition, light source carrier can have a line opening, and power lead passes line opening.

In an embodiment of aforesaid liquid crystal indicator and backlight module, light source carrier comprises a main support plate and two side plates, and main support plate perpendicular side plate and be parallel in fact incidence surface in fact.

In an embodiment of aforesaid liquid crystal indicator and backlight module, light source carrier comprises mutually perpendicular one main support plate and side plate, and main support plate is parallel in fact incidence surface.

In an embodiment of aforesaid liquid crystal indicator and backlight module, light guide plate for example is rectangle in fact, and incidence surface can be positioned at long limit or the minor face of light guide plate.

In an embodiment of aforesaid liquid crystal indicator and backlight module, the first location structure and the second location structure can the combinations via a screw.

In sum, at backlight module of the present invention and in using the liquid crystal indicator of this backlight module, light source carrier directly covers light guide plate by the incidence surface that framework exposed, and framework does not hinder light source carrier by the path of backlight module dismounting.Therefore, backlight module of the present invention and use the liquid crystal indicator of this backlight module to have advantages of assembling and maintenance is convenient, can not damage the optical characteristics of backlight module and assembling and maintenance in assembling and maintenance process expends man-hour and shorten and reduce costs.

For above and other purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate appended diagram, be described in detail below.

Description of drawings

Fig. 1 is a kind of partial cutaway diagram of known backlight module.

Fig. 2 A is the partial cutaway diagram of the backlight module of one embodiment of the invention.

Fig. 2 B is the partial cutaway diagram of the backlight module of another embodiment of the present invention.

Fig. 3 is the schematic perspective view of the backlight module of Fig. 2 A.

Fig. 4 is light source carrier in the backlight module of Fig. 2 A and the schematic perspective view of light source component.

Fig. 5 is the partial cutaway diagram of the liquid crystal indicator of one embodiment of the invention.

Description of reference numerals

100: backlight module

110: light source component

120: light guide plate

130: reflector plate

150: the glue frame

200,202: backlight module

210,210a: framework

212: the first location structures

214: the glue frame

216,216a: backboard

220: light guide plate

222: exiting surface

224: incidence surface

230: light source carrier

232: the second location structures

234: main support plate

236: side plate

240: light source component

242: circuit board

244: light emitting diode

250: reflector plate

D10: direction

P10: line opening

G12: guiding rib

G14: guide channel

B12: groove

B14: salient point

300: liquid crystal indicator

310: display panels

Embodiment

Fig. 2 A is the partial cutaway diagram of the backlight module of one embodiment of the invention, and Fig. 3 is the schematic perspective view of the backlight module of Fig. 2 A.Please refer to Fig. 2 A, the backlight module 200 of the present embodiment comprises a framework 210, a light guide plate 220, a light source carrier 230 and at least one light source component 240.Framework 210 has at least one the first location structure 212.First location structure 212 of the present embodiment is a jack, but the first location structure 212 can be also the location structure of any other suitable pattern.Light guide plate 220 be disposed in framework 210 and by 210 of frameworks around, and have an exiting surface 222 and an incidence surface 224 in abutting connection with exiting surface 222.Wherein, may be directly to contact or have other members between light guide plate 220 and framework 210.For example, framework 210 covers the exiting surface 222 of light guide plate 220 with around incidence surface 224, but exiting surface 222 major parts are exposed to supply light to penetrate, and incidence surface 224 major parts are exposed to for light incident.Light source carrier 230 has at least one the second location structure 232.The second location structure 232 in order to the first location structure 212 combinations so that light source carrier 230 covers incidence surfaces 224.Second location structure 232 of the present embodiment is take plate-like piece as example, but the second location structure 232 can be also the location structure of any other suitable pattern.Light source component 240 is fixed on light source carrier 230, and it is other to be positioned at incidence surface 224.

Particularly, by the combination of the second location structure 232 and the first location structure 212, but light source carrier 230 direct-assemblings are to framework 210, so that the light that light source component 240 provides can be incident to light guide plate 220 by incidence surface 224.Simultaneously, light source carrier 230 also can directly can not be subject to the obstruction of framework 210 by separating on framework 210.Therefore, when needs assembling or maintenance light source component 240, can directly light source carrier 230 be pulled out, and not need framework 210 and light guide plate 220 are disassembled.Simultaneously, because do not need to touch light guide plate 220 when assembling or maintenance light source component 240, damage light guide plate 220 and the optical characteristics of infringement backlight module 200 therefore can avoid scraping.

Please refer to Fig. 2 A and Fig. 3, the second location structure 232 be for example along in fact perpendicular to the direction D10 of incidence surface 224 with the first location structure 212 combinations.That is be, when light source carrier 230 is assembled on framework 210 or when separating on by framework 210, framework 210 can not hinder the mobile alignment of light source carrier 230 along direction D10.But different from the design of the second location structure 232 according to the first location structure 212, two location structures 212 also can carry out combination and dismounting along different paths from 232.Even, two location structures 212 and 232 also can carry out combination and dismounting along the path of bending, as long as can allow light source carrier 230 by separating Shi Buxu on framework 210, framework 210 and light guide plate 220 be disassembled.

Please refer to Fig. 2 A, the framework 210 of the present embodiment comprises a glue frame 214 and a backboard 216, and glue frame 214 is disposed on backboard 216 with light guide plate 220, and glue frame 214 is around light guide plate 220.Glue frame 214 can be brought into play the function of the relative position between the light source carrier 230 of lightguide plate fixing 220 and backboard 216 and follow-up assembling, and backboard 216 can be protected the bottom surface of light guide plate 220.In addition, first location structure 212 of the present embodiment is to be positioned on backboard 216, but the first location structure 212 also can design on glue frame 214, or glue frame 214 all has the first location structure 212 with backboard 216.Particularly, backboard 216 comprises a mutually perpendicular in fact base plate and a plurality of side plate, and the first location structure 212 is the jack that is positioned at the junction of base plate and side plate, and this jack is for example the finedraw of sleeve configuration.In addition, the light source carrier 230 of the present embodiment can comprise mutually perpendicular one main support plate 234 and side plate 236, that is the light source carrier 230 of the present embodiment is L-shaped.Wherein, main support plate 234 is parallel in fact incidence surface 224, and side plate 236 is as aforesaid the second location structure 232.At this moment, side plate 236 can pass as the jack of the first location structure 212 and be inserted between light guide plate 220 and backboard 216.Certainly, light source carrier 230 also can be designed to the ㄇ font, that is comprises a main support plate (not illustrating) and two side plates (not illustrating), and main support plate perpendicular side plate and be parallel in fact incidence surface 224 in fact.

Please refer to Fig. 2 B, the backlight module of another embodiment of the present invention 202 is roughly the same with the backlight module 200 of Fig. 2 A, and its difference place is as follows.In the present embodiment, backboard 216a only comprises base plate and does not contain side plate in the part with light source carrier 230 combinations.Light source carrier 230 comprises a mutually perpendicular in fact base plate and a plurality of side plate.The first location structure of framework 210a is jointly to be formed with backboard 216a by glue frame 214, does not indicate the first location structure in Fig. 2 B.Light source carrier 230 is inserted between light guide plate 220 and backboard 216a as the side plate 236 of the second location structure 232.In addition, the present embodiment latus inframedium 236 sections of having are poor with cooperation backboard 216a, but are not limited to this

Referring again to Fig. 2 A and Fig. 3, optionally design at least one guiding rib G12 on backboard 216, be designed with the guide channel G14 of corresponding guiding rib G12 on side plate 236.By this design, when light source carrier 230 was assembled to framework 210, guiding rib G12 will slide along guide channel G14, and then does suitable restriction for the course of light source carrier 230, to guarantee to assemble yield.Certainly, the position of guiding rib G12 and guide channel G14 also can be exchanged, and also is about to guide channel G14 and designs on backboard 216.Perhaps, can be designed with simultaneously guiding rib G12 and guide channel G14 on backboard 216, corresponding design is arranged on light source carrier 230.In addition, optionally design at least one groove B12, be designed with the salient point B14 of respective slot B12 on side plate 236.By this design, when light source carrier 230 is assembled to framework 210 and when arriving the location, the combination of salient point B14 and groove B12 can provide suitable strength to avoid light source carrier 230 to skid off.Certainly, the position of salient point B14 and groove B12 also can be exchanged, and also is about to salient point B14 and designs on backboard 216.Perhaps, can be designed with simultaneously salient point B14 and groove B12 on backboard 216, corresponding design is arranged on light source carrier 230.Those skilled in the art are when understanding, except guiding rib G12 and guide channel G14 and salient point B14 and groove B12, still there are many designs all can promote the assembling yield of light source carrier 230 and framework 210, for example use screw in conjunction with the first location structure 212 and the second location structure 232.Moreover the shape of light guide plate 220 for example is rectangle in fact, and incidence surface 224 can be positioned at long limit or the minor face of light guide plate 220.In addition, locate an also configurable reflector plate 250 in the bottom surface of light guide plate 220, with the utilization factor of further raising light.

Fig. 4 is light source carrier in the backlight module of Fig. 2 A and the schematic perspective view of light source component.Please refer to Fig. 2 A and Fig. 4, light source component 240 can comprise at least one circuit board 242 and a plurality of light emitting diode 244.Circuit board 242 is fixed on light source carrier 230, and its fixed form is for example to use double faced adhesive tape or other appropriate ways.Light emitting diode 224 is disposed on circuit board 242 and with circuit board 242 and is electrically connected, and between circuit board 242 and incidence surface 224.In addition, the circuit board 242 of the present embodiment is take bendable printed circuit board (PCB) as example, but circuit board 242 also can adopt compound substance printed circuit board (PCB), metal-core printed circuit board or other proper circuit plates.In addition, light source carrier 230 can have a line opening P10, and circuit board 242 passes line opening P10, can be extended out outside backlight module 200 to be used in the electric terminal that is connected with external drive circuit (not illustrating).In Fig. 4, the electric terminal of circuit board 242 is that an end by light source carrier 230 passes, but the electric terminal of circuit board 242 also can be passed by stage casing or other positions of light source carrier 230.Moreover the light emitting diode 244 of circuit board 242 can form a line or multiple row, or the quantity of increase circuit board 242 is to promote the quantity of the light emitting diode 244 that can carry, to increase backlight module 200 overall brightnesses.Certainly, light source component 240 also can be comprised of at least one cathode fluorescent tube (not illustrating) and a power lead (not illustrating), and power lead is electrically connected to cathode fluorescent tube, and power lead can pass line opening.

Fig. 5 is the partial cutaway diagram of the liquid crystal indicator of one embodiment of the invention.Please refer to Fig. 5, the liquid crystal indicator 300 of the present embodiment comprises backlight module 200 and the display panels 310 of Fig. 2 A, and display panels 300 is disposed at the exiting surface 222 of backlight module 200.Certainly, the backlight module 202 that backlight module 200 also can Fig. 2 B or other alternate embodiment of backlight module of the present invention replace.

In sum, at backlight module of the present invention and in using the liquid crystal indicator of this backlight module, light source carrier can not be subjected to framework or other members hinder and are dismantled by backlight module.Therefore, when assembling or keeping in repair the light source component on light source carrier, need not dismantle other members of backlight module.Thus, significantly increase backlight module and used assembling and the maintenance of the liquid crystal indicator of this backlight module, and shortened assembling and maintenance man-hours and reduce costs, and can avoid in assembling and maintenance process other assemblies of damage to safeguard the optical characteristics of backlight module.

Although the present invention discloses as above with preferred embodiment; so it is not to limit the present invention; those of ordinary skill in technical field under any; without departing from the spirit and scope of the present invention; when can do a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the claim person of defining.

Claims (7)

1. backlight module comprises:
One framework has at least one jack and a backboard;
One light guide plate, be disposed in this framework and by this framework institute around, have an exiting surface and an incidence surface in abutting connection with this exiting surface, wherein this framework exposes this exiting surface and this incidence surface;
One light source carrier has at least one side plate, and wherein this side plate is in order to be combined with this jack, so that this light source carrier covers this incidence surface; And
At least one light source is fixed on this light source carrier without part, and is positioned at by this incidence surface,
it is characterized in that this backboard has more guiding rib or a guide channel, and this side plate has the guide channel that should guide rib or has a guiding rib that should guide channel, this side plate is to be inserted between this light guide plate and this backboard along the bearing of trend of this guiding rib or guide channel, this backboard has more at least one salient point or groove, and this side plate has at least one groove that should salient point or has at least one salient point that should groove, this side plate is positioned between this light guide plate and this backboard by the combination of this salient point and this groove, this light source component comprises at least one circuit board, be fixed on this light source carrier, this light source carrier has at least one line opening, this circuit board has at least one electric terminal, this electric terminal passes this line opening and extends outside this backlight module.
2. backlight module as claimed in claim 1, wherein this side plate is along being combined with this jack perpendicular to the direction of this incidence surface in fact.
3. backlight module as claimed in claim 1, wherein this light source carrier more comprises a main support plate of vertical this side plate, and this main support plate is parallel in fact this incidence surface, and this side plate is inserted between this light guide plate and this backboard via this jack.
4. backlight module as claimed in claim 1, wherein this light source component more comprises:
A plurality of light emitting diodes are disposed on this circuit board and are electrically connected with this circuit board, and between this circuit board and this incidence surface.
5. liquid crystal indicator comprises:
One backlight module comprises:
One framework has at least one jack and a backboard;
One light guide plate, be disposed in this framework and by this framework institute around, have an exiting surface and an incidence surface in abutting connection with this exiting surface, wherein this framework exposes this exiting surface and this incidence surface;
One light source carrier has at least one side plate, and wherein this side plate is in order to be combined with this jack, so that this light source carrier covers this incidence surface;
At least one light source component is fixed on this light source carrier, and is positioned at by this incidence surface; And
one display panels, be disposed at this exiting surface of this backlight module, it is characterized in that this backboard has more guiding rib or a guide channel, and this side plate has the guide channel that should guide rib or has a guiding rib that should guide channel, this side plate is to be inserted between this light guide plate and this backboard along the bearing of trend of this guiding rib or guide channel, this backboard has more at least one salient point or groove, and this side plate has at least one groove that should salient point or has at least one salient point that should groove, this side plate is positioned between this light guide plate and this backboard by the combination of this salient point and this groove, this light source component comprises at least one circuit board, be fixed on this light source carrier, this light source carrier has at least one line opening, this circuit board has at least one electric terminal, this electric terminal passes this line opening and extends outside this backlight module.
6. liquid crystal indicator as claimed in claim 5, wherein this side plate is along being combined with this jack perpendicular to the direction of this incidence surface in fact.
7. liquid crystal indicator as claimed in claim 5, wherein this light source component more comprises:
A plurality of light emitting diodes are disposed on this circuit board and are electrically connected with this circuit board, and between this circuit board and this incidence surface.
CN 200810108585 2008-05-27 2008-05-27 Backlight module and liquid crystal display applying same CN101592820B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200810108585 CN101592820B (en) 2008-05-27 2008-05-27 Backlight module and liquid crystal display applying same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200810108585 CN101592820B (en) 2008-05-27 2008-05-27 Backlight module and liquid crystal display applying same

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CN101592820A CN101592820A (en) 2009-12-02
CN101592820B true CN101592820B (en) 2013-06-12

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EP2431654B1 (en) * 2010-09-17 2018-11-14 LG Innotek Co., Ltd. Lighting module and lighting apparatus including the same
US9074740B2 (en) * 2011-07-01 2015-07-07 Innolux Corporation Backlight structure and display module using the same
CN202394007U (en) * 2011-11-01 2012-08-22 深圳市华星光电技术有限公司 Liquid crystal display (LCD) device
CN102628583A (en) * 2012-03-27 2012-08-08 深圳市华星光电技术有限公司 External frame of display device, backlight module and liquid crystal display device
CN103148416B (en) * 2013-03-21 2015-01-07 京东方科技集团股份有限公司 Backlight module and liquid crystal display device
CN103676321A (en) * 2013-12-27 2014-03-26 深圳市华星光电技术有限公司 Liquid crystal display device
CN104879678B (en) * 2014-02-27 2019-07-05 群创光电股份有限公司 Backlight module
TWI557479B (en) 2014-02-27 2016-11-11 群創光電股份有限公司 Backlight module
CN108132555A (en) * 2018-01-04 2018-06-08 惠州市华星光电技术有限公司 Backboard, backlight module and liquid crystal display device

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CN1847942A (en) * 2005-04-12 2006-10-18 鸿富锦精密工业(深圳)有限公司 Back light module

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US5280372A (en) * 1992-08-03 1994-01-18 Sharp Kabushiki Kaisha Liquid crystal display device
CN1630794A (en) * 2002-02-12 2005-06-22 松下电器产业株式会社 Lighting device, and liquid crystal display device using the same
CN1847942A (en) * 2005-04-12 2006-10-18 鸿富锦精密工业(深圳)有限公司 Back light module

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