CN201138407Y - Downward backlight module - Google Patents

Downward backlight module Download PDF

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Publication number
CN201138407Y
CN201138407Y CNU2007201389262U CN200720138926U CN201138407Y CN 201138407 Y CN201138407 Y CN 201138407Y CN U2007201389262 U CNU2007201389262 U CN U2007201389262U CN 200720138926 U CN200720138926 U CN 200720138926U CN 201138407 Y CN201138407 Y CN 201138407Y
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CN
China
Prior art keywords
projection
backlight module
opening
backboard
fixed part
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.)
Expired - Fee Related
Application number
CNU2007201389262U
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Chinese (zh)
Inventor
谢忠志
林琪升
傅肇垣
林文郁
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.)
CPT DISPLAY TECHNOLOGY (SHENZHEN)CO., LTD.
Original Assignee
Chunghwa Picture Tubes 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
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Priority to CNU2007201389262U priority Critical patent/CN201138407Y/en
Application granted granted Critical
Publication of CN201138407Y publication Critical patent/CN201138407Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a direct down backlight module which adds support force to a diffusion plate by locking a lug integrated with the diffusion plate to a back plate, a supporting part or an upper frame, so as to reduce the number of components. Therefore, the direct backlight module provides a even light source, improves the display quality of a plane display, and can simplify the assembly procedures, reduce the assembly time and the overall tolerance of the components.

Description

The Staight downward type backlight module
Technical field
The utility model relates to a kind of Staight downward type backlight module, refers to a kind of Staight downward type backlight module that is applicable to liquid crystal panel and flat-panel screens especially.
Background technology
Progress along with Thin Film Transistor-LCD (TFT-LCD) manufacturing technology, with its have gently, approach, power saving and advantage such as radiationless, and make Thin Film Transistor-LCD be widely used on the industries such as personal digital assistant, mobile computer, mobile phone and TV, but because liquid crystal panel is not the display device of emissive type, therefore need to cooperate the light source that backlight module provided, can show the picture of the required performance of liquid crystal panel.
Please refer to Fig. 1, it shows the cross-sectional view of known direct type backlight module, backlight module 1 comprise backboard 11, reflector plate 12, light source 13, diffuser plate supporting construction 14, diffuser plate 15, down diffusion sheet 161, light-collecting piece 162, go up parts such as blooming pieces 16 such as diffusion sheet 163 and upper ledge 17 backlight.Blooming piece 16 and diffuser plate 15 are to fix by the diffuser plate supporting construction 14 that plug is located between backboard 11 and the upper ledge backlight 17.
Yet because present Thin Film Transistor-LCD develops towards large scale, the size of blooming piece 16 also becomes big relatively in the backlight module 1, and Thin Film Transistor-LCD carries out long-term lighting or leaves standstill under the more harsh situation of environmental baselines such as excess temperature, humidity after, often because of the influence of latencies such as temperature, humidity and the gravity of material own, cause the blooming piece 16 in the backlight module 1 to produce various warpages and distortion, and then the uneven phenomenon of backlight module 1 display surface takes place, cause its overall optical qualities to reduce.
Please refer to Fig. 2 A, it shows the cross-sectional view of prior art for the backlight module that addresses the above problem.As shown in FIG., its diffuser plate 15 is to be fixed between backboard 21 and the upper ledge backlight 17 and not have the assembly of diffuser plate supporting construction 14, and be to be provided with a projection 151 on the diffuser plate 15, diffuser plate 15 is by projection 151 and the fastening of bracing or strutting arrangement 22 and the fastening of bracing or strutting arrangement 22 and backboard 21, to reduce diffuser plate 15 because of distortion that own wt was produced, and reach the deflection that suppresses blooming piece 16, and and then reduce the uneven phenomenon of backlight module 2 display surfaces.
Other please refer to Fig. 2 B, issuable error when the backlight module that its displayed map 2A shows is assembled.Each assembly can produce a little error (δ when making X1, δ X2, δ X3, δ X4, δ Y1, δ Y2, δ Y3, δ Y4), if component count is got over incident at most cumulative errors (∑ δ x, ∑ δ y, ∑ δ wherein xX1+ δ X2+ δ X3+ δ X4, and ∑ δ yY1+ δ Y2+ δ Y3+ δ Y4) also can increase.This situation postpartum can be serious increasingly in inlet, because can wear and tear mould gradually in continuing production run, and makes error gradually increase, therefore cause one-piece construction in conjunction with bad, produce the facts of different sound, wearing and tearing even fracture.
Then, the bracing or strutting arrangement 22 shown in Fig. 2 A is variant with projection 151 on material, thereby causes rayed to produce different refractive indexes when different material surfaces, makes this structural region produce the blanking bar or the bad facts of other optical quality.
In addition, above-mentioned backlight module 2 needs labor intensive and time in assembling, promptly must earlier bracing or strutting arrangement 22 and backboard 21 be fastened, and projection 151 is combined with bracing or strutting arrangement 22, so increase its cost of manufacture again.
The utility model content
The purpose of this utility model provides a kind of Staight downward type backlight module, and it comprises: a backboard and a diffuser plate.Backboard comprises at least one fixed orifice, and has an accommodation space; Diffuser plate is to be arranged at above-mentioned accommodation space top, and this diffuser plate includes a dull and stereotyped and at least one projection, and wherein projection is to be formed in one with flat board, and sets firmly with an end and to be connected in flat board, and the other end of projection is to form a fixed part.Wherein, fixed orifice is that corresponding projection is arranged at backboard, and fixed part is to be sticked in the fixed orifice.
The utility model provides a kind of Staight downward type backlight module in addition, comprising: a backboard, a upper ledge and a diffuser plate.Upper ledge comprises at least one fixed orifice, and upper ledge is to form an accommodation space with the backboard clamping; Diffuser plate is to be arranged at the accommodation space top, and this diffuser plate comprises a dull and stereotyped and at least one projection, and wherein projection is to be formed in one with flat board, and sets firmly this flat board of connection with an end, and the other end of projection is to form at least one fixed part.Wherein, fixed orifice is that corresponding projection is arranged at upper ledge, and fixed part is to be sticked in the fixed orifice.
The utility model provides a kind of Staight downward type backlight module in addition, comprising: a backboard, a upper ledge, a support member and a diffuser plate.Upper ledge is to form an accommodation space with the backboard clamping; Support member comprises at least one fixed orifice, and support member is to be placed between backboard and the upper ledge; Diffuser plate is to be arranged at accommodation space top, and this diffuser plate comprises a flat board, and at least one projection, and wherein projection is to be formed in one with flat board, and sets firmly with an end and to be connected in flat board, and the other end of projection is to form at least one fixed part.Wherein, fixed orifice is that corresponding projection is arranged at support member, and fixed part is to be sticked in the fixed orifice.
In the utility model, the shape of above-mentioned projection is not defined as given shape, but is preferable with the cylinder of circular, square, wedge shape or polygonal section shape.Secondly, the position of projection configuration also is not limited to ad-hoc location, so to be positioned at dull and stereotyped center, dull and stereotyped edge or to be evenly distributed in dull and stereotyped going up to preferable.In addition, the number of projection also is not defined as given number, when it is applied to undersized LCD, it can be odd number, and along with the LCD size of its application becomes greatly, its number also can gradually increase so that preferable anchorage force to be provided, but also can be under the consideration of backlight module bulk strength, the number that reduces projection is provided with the intensity of backboard, support member or the upper ledge of fixed orifice to reduce corresponding fixed orifice number with dimension.
Said fixing portion can be one or more claw types, I-shaped fastener, and can be sticked in the fixed orifice of corresponding each fixed part, and perhaps fixed part also can be a flat part, sticks together fixing and can see through an adhesion.
In addition, in the utility model, fixed orifice also can comprise one first opening and one second opening, and first opening is to be adjacent to second opening, and the area of first opening is the area less than second opening, so fixed orifice and provide projection can be sticked in first opening.
Yet support member of the present utility model is provided with the position and can plugs in accommodation space edge for supporting diffuser plate, and its material is not defined as homogenous material, so is preferably plastics or acryl.
In the utility model, above-mentioned luminescence component is for providing light source, so it can be cold cathode fluorescent tube (CCFL), thermic cathode fluorimetric pipe (HCFL), light emitting diode (LED) and electroluminescence part (EL) one of them, the number of luminescence component is not defined as given number, and it is to look closely in the applied LCD size and the required intensity of light source.
Above-mentioned blooming piece is the single or multiple lift film of the optical property of adjustment light source, and its one or arbitrary collection that can be down diffusion sheet, light-collecting piece and go up diffusion sheet.
The beneficial effects of the utility model are, backlight module is that projection and backboard of the present utility model, support member or upper ledge are made in one-body molded mode, saving component count, thereby simplify the global tolerance of package program and time and reduction assembly.In addition, the reduction of component count also makes assembly junction number reduce, and the light source quality that backlight module is provided in the assembly junction has certain influence, therefore, backlight module of the present utility model also can provide optical quality (for example homogeneity etc.) preferable light source, with the display quality of the LCD of promoting its application.
Description of drawings
Fig. 1 is the cross-sectional view of existing direct type backlight module;
Fig. 2 A is the cross-sectional view of existing direct type backlight module;
Fig. 2 B is the backlight module issuable error synoptic diagram of when assembling of Fig. 2 A;
Fig. 3 is the cross-sectional view of the Staight downward type backlight module of the utility model first preferred embodiment;
Fig. 4 is the cross-sectional view of the backlight module of the utility model second preferred embodiment;
Fig. 5 A, Fig. 5 B are the fastening steps of displayed map 4 embodiment projections;
Fig. 6 A is the backlight module synoptic diagram of the utility model the 3rd preferred embodiment;
Fig. 6 B is the backlight module synoptic diagram of the utility model the 4th preferred embodiment;
Fig. 7 is the cross-sectional view of the backlight module of the utility model the 5th preferred embodiment;
Fig. 8 is the cross-sectional view of the backlight module of the utility model the 6th preferred embodiment;
Fig. 9 is the cross-sectional view of the backlight module of the utility model the 7th preferred embodiment.
[primary clustering symbol description]
Staight downward type backlight module 1,2,3,4,5,6,7 reflector plates 12
Light source 13 diffuser plate supporting constructions 14
Diffuser plate 15,34,44,54,64,74 blooming pieces 16
Bracing or strutting arrangement 22 housings 31,41,51,61,71
Luminescence component 32 accommodation spaces 33
Blooming piece 35 adhesions 56
Support member 67 projections 151,341,441,541,641,741
Following diffusion sheet 161 light-collecting pieces 162
Last diffusion sheet 163 fixed orifices 313,413,613,713
Fixed part 342,442,542,642,742 openings 414,424
Backboard 11,21,311,411,511,611,711
Upper ledge 17,312,412,512,612,712 backlight
Dull and stereotyped 343,443,543,643,743
Embodiment
At first, please refer to Fig. 3, it shows the cross-sectional view of the Staight downward type backlight module of the utility model first preferred embodiment, is the simple and clear structure that shows present embodiment, only demonstrate in drawing edges at two ends and central construct.
As shown in FIG., backlight module 3 mainly comprises: a housing 31, a plurality of luminescence component 32, most layer blooming piece 35 and a diffuser plate 34.
In the present embodiment, housing 31 is made up of a backboard 311 and a upper ledge 312, backboard 311 and upper ledge 312 are the marginal portion clampings at predetermined ccontaining diffuser plate 34 places, and form an accommodation space 33 in the centre at predetermined ccontaining diffuser plate 34 places, and more offer a fixed orifice 313 on the backboard 311.
Above-mentioned luminescence component 32 is to be contained in this accommodation space 33, and its number, light source kind do not limit, and present embodiment is an example with 6 cold cathode fluorescent tubes (CCFL) only.
Above-mentioned diffuser plate 34 is to be held between backboard 311 and the upper ledge 312, and diffuser plate 34 comprises a flat board 343, reaches at least one projection 341, projection 341 is and the dull and stereotyped 343 one-body molded centers that are made in flat board 343, and projection 341 is to set firmly with an end to be connected in flat board 343, and the other end of projection 341 (open end) is to form at least one fixed part 342 for fixing.In the present embodiment, projection 341 is arranged at dull and stereotyped 343 center, and so in other embodiment, projection 341 also can be arranged at dull and stereotyped 343 edge.
In addition, the fixed part 342 of present embodiment is a plurality of claw type fasteners, and projection 341 is to be inserted in the fixed orifice 313 corresponding on the backboard 311, and fixed part 342 is to be fastened on wherein after being pressed into fixed orifice 313, so that fixed part 342 obtains being provided in diffuser plate 34 centre with fixed orifice 313 fastenings anchorage force except the anchorage force that can obtain being provided by housing 31 at the ora terminalis place, also is provided the diffuser plate 34 of present embodiment.Therefore, in the present embodiment, reduce the deformation that diffuser plate 34 causes because of gravity factor.
Above-mentioned blooming piece 35 is the structure of three layers of optical thin film, and it includes one first diffusion sheet (not shown), a light-collecting piece (not shown), one second diffusion sheet (not shown), and blooming piece 35 is to be attached on dull and stereotyped 343.
Therefore, the planarization of the blooming piece 35 of present embodiment is not subjected to the influence of diffuser plate 34 because of the deformation of gravity sag generation, thereby provide optical quality preferable light source, display quality with the LCD of promoting its application, and because of the projection 341 of present embodiment is and dull and stereotyped 343 one-body molded making, therefore component count is less, thus the global tolerance that can simplify package program, reduce built-up time and reduce assembly.
Secondly, please refer to Fig. 4, it shows the cross-sectional view of the backlight module of the utility model second preferred embodiment, is the simple and clear structure that shows present embodiment, only demonstrate in drawing edges at two ends and central construct.
In the present embodiment, for omitting length, so only elaborate at present embodiment and different the locating of a last embodiment.
As shown in FIG., diffuser plate 44 includes a flat board 443, reaches on the projection 441, projection 441 is to be arranged at dull and stereotyped 443 centers, and housing 41 then includes a backboard 411 and a upper ledge 412, and corresponding projection 441 places also are provided with a fixed orifice 413 on backboard 411.
In the present embodiment, a formed fixed part 442 is an I-shaped fastener on projection 441 open ends, the fixed orifice 413 of present embodiment comprises that one first opening 414 and one second opening 424 so that fixed part 442 is sticked in first opening 414 slidably, please refer to Fig. 5 A, Fig. 5 B are fastened on the fixed orifice 413 of backboard 411 with further understanding present embodiment projection 441 step.
As shown in Fig. 5 A, at first, the fixed part 442 of projection 441 is penetrated second opening 424 and be placed in wherein, secondly, fixed part 442 is pushed by the application of force in first opening 414 to fasten.
In addition, please refer to Fig. 6 A, Fig. 6 B, it shows the backlight module synoptic diagram of the utility model the 3rd, the 4th preferred embodiment.
When the applied display sizes of the utility model increases, the number of projection 441 or the area of section can increase thereupon, as shown in Fig. 6 A, projection 441 is evenly distributed in diffuser plate 44, and bigger projection 441 areas of section of demonstration among Fig. 6 B, disperse the structure number and the area of buckling deformation power by this with increase, and alleviate the uneven phenomenon of backlight module 4 display surfaces.
Then, please refer to Fig. 7, it shows the cross-sectional view of the backlight module of the utility model the 5th preferred embodiment, is the simple and clear structure that shows present embodiment, only demonstrate in drawing edges at two ends and central construct.
In the present embodiment, for omitting length, so only elaborate at present embodiment and different the locating of a last embodiment.
The section shape of the projection 541 of present embodiment can be following wherein a kind of: circular, square, wedge shape or polygon, and its fixed part 542 is a flat part, and stick together and be fixed in backboard 511 and can see through an adhesion 56.
Again, please refer to Fig. 8, it shows the cross-sectional view of the backlight module of the utility model the 6th preferred embodiment, is the simple and clear structure that shows present embodiment, the structure at the edge of only demonstrating in drawing.
Compared to last embodiment, the backlight module 6 of present embodiment more comprises a support member 67, and it is to be placed between backboard 611 and the upper ledge 612, in order to support diffuser plate 64.Then be provided with a projection 641 in dull and stereotyped 643 1 lip-deep edges, an end of projection 641 is the fixed parts 642 that form a plurality of claw type fastener shapes.And corresponding projection 641 places are provided with a fixed orifice 613 on support member 67, are fastened on wherein for fixed part 642.
In addition, please refer to the cross-sectional view of the backlight module of the utility model shown in Figure 9 the 7th preferred embodiment, be the simple and clear structure that shows present embodiment, the structure at the edge of hereat in drawing, only demonstrating.
As shown in FIG., compared to a last embodiment, the projection 741 of present embodiment is to be arranged at dull and stereotyped 743 another relative lip-deep edges, so the position of fixed orifice 713 is corresponding projection 741 places at upper ledge 712.
By learning in above-mentioned, the utility model is to see through with the integrated projection of diffuser plate and backboard, support member or upper ledge to fasten, to increase the anchorage force of diffuser plate and to reduce the number of assembly, therefore reaching the light source that provides optical quality preferable, in the time of with the display quality of the flat-panel screens of promoting its application, the global tolerance that also can simplify package program, reduces built-up time and reduce assembly.
The foregoing description is only given an example for convenience of description, and the interest field that the utility model is advocated should be as the criterion so that claim is described certainly, but not only limits to the foregoing description.

Claims (12)

1. Staight downward type backlight module is characterized in that comprising:
One backboard comprises at least one fixed orifice, and this backboard has an accommodation space; And
One diffuser plate is arranged at this accommodation space top, and it comprises a flat board, and at least one projection, and wherein this projection is to be formed in one with this flat board, and sets firmly with an end and to be connected in this flat board, and the other end of this projection is to form a fixed part;
Wherein, this fixed orifice is to should being arranged at this backboard by projection, and this fixed part is sticked in this fixed orifice.
2. Staight downward type backlight module as claimed in claim 1 is characterized in that, this fixed part is a claw type fastener, an I-shaped fastener or a flat part.
3. Staight downward type backlight module as claimed in claim 1, it is characterized in that, this fixed orifice also comprises one first opening and one second opening, this first opening is to be adjacent to this second opening, and the area of this first opening is the area less than this second opening, and this fixed part is sticked in this first opening.
4. Staight downward type backlight module as claimed in claim 1 is characterized in that, this projection is to be disposed at this dull and stereotyped center, this dull and stereotyped edge or to be evenly distributed in this flat board.
5. Staight downward type backlight module is characterized in that comprising:
One backboard;
One upper ledge comprises at least one fixed orifice, and this upper ledge is to form an accommodation space with this backboard clamping; And
One diffuser plate is to be arranged at this accommodation space top, and it comprises a flat board, and at least one projection, and wherein this projection is to be formed in one with this flat board, and sets firmly with an end and to be connected in this flat board, and the other end of this projection is to form a fixed part;
Wherein, this fixed orifice is to should being arranged at this upper ledge by projection, and this fixed part is to be sticked in this fixed orifice.
6. Staight downward type backlight module as claimed in claim 5 is characterized in that, this fixed part is a claw type fastener, an I-shaped fastener or a flat part.
7. Staight downward type backlight module as claimed in claim 5, it is characterized in that, this fixed orifice also comprises one first opening and one second opening, this first opening is to be adjacent to this second opening, and the area of this first opening is the area less than this second opening, and this fixed part is sticked in this first opening.
8. Staight downward type backlight module as claimed in claim 5 is characterized in that, this projection is this dull and stereotyped edge of configuration.
9. Staight downward type backlight module is characterized in that comprising:
One backboard;
One upper ledge is to form an accommodation space with this backboard clamping;
One support member comprises at least one fixed orifice, and this support member is to be placed between this backboard and this upper ledge; And
One diffuser plate is arranged at this accommodation space top, and it comprises a flat board, and at least one projection, and wherein this projection is to be formed in one with this flat board, and sets firmly with an end and to be connected in this flat board, and the other end of this projection is to form a fixed part;
Wherein, this fixed orifice is to should being arranged at this support member by projection, and this fixed part is to be sticked in this fixed orifice.
10. Staight downward type backlight module as claimed in claim 9 is characterized in that, this fixed part is a claw type fastener, an I-shaped fastener or a flat part.
11. Staight downward type backlight module as claimed in claim 9, it is characterized in that this fixed orifice also comprises one first opening and one second opening, this first opening is adjacent to this second opening, and the area of this first opening is less than the area of this second opening, and this fixed part is sticked in this first opening.
12. Staight downward type backlight module as claimed in claim 9 is characterized in that, this projection is disposed at this dull and stereotyped edge.
CNU2007201389262U 2007-08-20 2007-08-20 Downward backlight module Expired - Fee Related CN201138407Y (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102767758A (en) * 2012-07-03 2012-11-07 深圳市华星光电技术有限公司 Backlight module and LCD including same
WO2015096435A1 (en) * 2013-12-23 2015-07-02 京东方科技集团股份有限公司 Backlight source and display device
CN109212830A (en) * 2018-10-17 2019-01-15 惠州市华星光电技术有限公司 Backlight module and its manufacturing method
CN110133911A (en) * 2019-05-15 2019-08-16 京东方科技集团股份有限公司 Backlight module and airborne display device
CN110546557A (en) * 2017-04-26 2019-12-06 西铁城电子株式会社 back light source
CN112241087A (en) * 2019-07-19 2021-01-19 船井电机株式会社 Illumination device and display device
WO2021103230A1 (en) * 2019-11-25 2021-06-03 惠州市华星光电技术有限公司 Backlight module and liquid crystal display device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102767758A (en) * 2012-07-03 2012-11-07 深圳市华星光电技术有限公司 Backlight module and LCD including same
WO2015096435A1 (en) * 2013-12-23 2015-07-02 京东方科技集团股份有限公司 Backlight source and display device
US9651823B2 (en) 2013-12-23 2017-05-16 Boe Technology Group Co., Ltd. Backlight source and display device
US11506935B2 (en) 2017-04-26 2022-11-22 Nichia Corporation Backlight
DE112018002237B4 (en) 2017-04-26 2024-06-20 Nichia Corporation BACKLIGHT
CN110546557A (en) * 2017-04-26 2019-12-06 西铁城电子株式会社 back light source
US11675230B2 (en) 2017-04-26 2023-06-13 Nichia Corporation Backlight
CN110546557B (en) * 2017-04-26 2023-02-21 日亚化学工业株式会社 Back light source
CN109212830A (en) * 2018-10-17 2019-01-15 惠州市华星光电技术有限公司 Backlight module and its manufacturing method
CN110133911A (en) * 2019-05-15 2019-08-16 京东方科技集团股份有限公司 Backlight module and airborne display device
CN112241087A (en) * 2019-07-19 2021-01-19 船井电机株式会社 Illumination device and display device
CN112241087B (en) * 2019-07-19 2023-08-11 船井电机株式会社 Lighting device and display device
WO2021103230A1 (en) * 2019-11-25 2021-06-03 惠州市华星光电技术有限公司 Backlight module and liquid crystal display device

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Owner name: CPT TECHNOLOGY (GROUP) CO., LTD.

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Effective date: 20130718

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Effective date of registration: 20130718

Address after: 350000, No. 1, building 6, building No. third, fourth, Confucian Road West, Mawei District, Fujian, Fuzhou

Patentee after: CPT DISPLAY TECHNOLOGY (SHENZHEN)CO., LTD.

Address before: Taipei City, Taiwan, China

Patentee before: Chunghwa Picture Tubes Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20081022

Termination date: 20160820