CN201314496Y - Backlight module - Google Patents

Backlight module Download PDF

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Publication number
CN201314496Y
CN201314496Y CNU2008201766732U CN200820176673U CN201314496Y CN 201314496 Y CN201314496 Y CN 201314496Y CN U2008201766732 U CNU2008201766732 U CN U2008201766732U CN 200820176673 U CN200820176673 U CN 200820176673U CN 201314496 Y CN201314496 Y CN 201314496Y
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CN
China
Prior art keywords
backlight module
backboard
utility
model
liquid crystal
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
CNU2008201766732U
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Chinese (zh)
Inventor
林修宇
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.)
Chunghwa Picture Tubes 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
Application filed by Chunghwa Picture Tubes Ltd filed Critical Chunghwa Picture Tubes Ltd
Priority to CNU2008201766732U priority Critical patent/CN201314496Y/en
Application granted granted Critical
Publication of CN201314496Y publication Critical patent/CN201314496Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a backlight module, in particular to a sidelight type backlight module. The backlight module comprises a backplane which is provided with a plurality of sidewalls, a plurality of supporting elements which are arranged on joints of the sidewalls, and a reflector which is arranged on the supporting elements. In the backlight module, as the reflector is supported by a plurality of supporting elements, an air layer is formed between the reflector and the backplane. Therefore, when the backlight module is operated, heat energy generated by a luminescent unit of the backlight module is not transmitted to the reflector, that is, after the backlight module is used for a long time, the temperature of the reflector of the backlight module still can be maintained to be a stable value.

Description

Backlight module
Technical field
The utility model is about a kind of backlight module, refers to a kind of side light type back light module especially.
Background technology
As shown in Figure 1, it is the generalized section of a known liquid crystal indicator 1, and known backlight module comprises: a backboard 11, a light-emitting diode light bar 12, the reflector plate 14 of a LGP 13 and between LGP 13 and backboard 11.Wherein, backboard 11 is contained in light-emitting diode light bar 12, LGP 13 and reflector plate 14 wherein.In addition, backboard 11 comprises a base plate (not shown) and by the upwardly extending backboard sidewall 111 of base plate (not shown), and aforesaid light-emitting diode light bar 12 is fixed on the backboard sidewall 111.In addition, known backlight module comprises that also one is arranged at the optical diaphragm group 15 of the top of LGP 13, and the light that is upwards penetrated by LGP 13 is modulated.In addition, when aforesaid liquid crystal indicator 1 is assembled, liquid crystal panel 16 is the tops that are arranged at aforesaid optical diaphragm group 15, and upper ledge 17 is covered in the top of liquid crystal panel 16 and backboard 11, the sidewall 171 of upper ledge 17 engages mutually with the sidewall 111 of backboard 11, so that aforesaid each element is fixed in the backboard 11.
But, when known backlight module operates, its light-emitting diode light bar 12 with a plurality of light emitting diodes 121 can be constantly with the backboard sidewall 111 of these light emitting diode 121 thermal energy conduction that produce to backboard 11, and the entire portion that heat energy can little by little be distributed to backboard 11 also upwards is passed in the reflector plate 14 that contacts with backboard 11.Reflector plate 14, LGP 13, optical diaphragm group 15 temperature can little by little raise along with the conduction of heat energy, cause the optical characteristics of LGP 13, optical diaphragm group 15 to change, as the buckling deformation of being heated of LGP 13 and optical diaphragm group 15, even the penetrance and the reaction speed that influence liquid crystal (not shown) in the liquid crystal panel 16 of liquid crystal indicator 1 change.Therefore, after using for a long time, the display performance of aforesaid liquid crystal indicator 1 can little by little fail.
Therefore, industry needs a kind of backlight module that avoid its optical characteristics to fail gradually because of thermal energy conduction that its light source produced to the cause of its optical element.
The utility model content
The purpose of this utility model provides a kind of backlight module, and the heat energy that can avoid luminescence unit to produce can upwards conduct to reflector plate by backboard.
Backlight module of the present utility model comprises: a backboard has a plurality of sidewalls; A plurality of support components are arranged on the joint of these a plurality of sidewalls; And a reflector plate, be arranged on the support component.
Backlight module of the present utility model has a plurality of support components of its reflector plate in the top of its backboard that are used to support, the reflector plate of backlight module of the present utility model can and backboard between keep a segment distance, promptly be gripped with an air layer between reflector plate and the backboard.In addition, these support components are preferably by the relatively poor material of thermal conductivity and constitute, as plastics.
The support component of backlight module of the present utility model can be fixed on the base plate of this backboard by any way, and these support components are preferably the chimeric mode of the backboard sidewall that utilizes backboard therewith or utilize the mode of screw locking to be fixed on the base plate of this backboard.In addition, backlight module of the present utility model can also comprise a conducting strip in any position of its inside, and this conducting strip is preferable on the base plate of this backboard or be folded in this backboard therewith between the reflector plate.Backlight module of the present utility model can also comprise the conducting strip of an any kind of, and this conducting strip is preferably a graphite flake.Backlight module of the present utility model can comprise also that one has the conducting strip of virtually any size, the preferable reflector plate therewith of the size of this conducting strip measure-alike.Backlight module of the present utility model can have the luminescence unit of any kind, and this luminescence unit is preferably light-emitting diode light bar or cold cathode fluorescent lamp pipe.The light-emitting diode light bar of backlight module of the present utility model is preferable to have a plurality of light emitting diodes.The luminescence unit of backlight module of the present utility model can be arranged at any position of its inside, the preferable sidewall that is arranged at its backboard of this luminescence unit.Backlight module of the present utility model also comprises an optical diaphragm group, the preferable top that is positioned at this reflector plate of this optical diaphragm group.
The beneficial effects of the utility model are:
Backlight module of the present utility model, the heat energy that can avoid luminescence unit to produce can upwards conduct to reflector plate by backboard.
Description of drawings
Be further to disclose concrete technology contents of the present utility model, below in conjunction with embodiment and accompanying drawing describes in detail as after, wherein:
Fig. 1 is the generalized section of a known liquid crystal indicator.
Fig. 2 is the decomposing schematic representation of the liquid crystal indicator of application backlight module of the present utility model.
Fig. 3 is the generalized section along the online gained of AA ' of Fig. 2.
Fig. 4 A and Fig. 4 B show that the support component of the area B that is arranged in Fig. 2 is the schematic diagram that is fixed in the base plate of backboard in the chimeric mode of pin.
Fig. 5 A and Fig. 5 B show that the support component of the zone C that is arranged in Fig. 2 is the schematic diagram that is fixed in the base plate of backboard in the mode of screw locking.
The specific embodiment
At first as shown in Figures 2 and 3, Fig. 2 is the decomposing schematic representation of the liquid crystal indicator of application backlight module of the present utility model, and Fig. 3 then is the generalized section along the online gained of AA ' of Fig. 2.Wherein, backlight module 2 of the present utility model comprises: a backboard 21, four support components 221,222,223 and 224 and are positioned at the reflector plate 23 on these support components 221,222,223 and 224.In addition, backlight module 2 of the present utility model can also comprise a light-emitting diode light bar 24, a LGP 25, a conducting strip 26 and an optical diaphragm group 27.
On the other hand, as shown in Figures 2 and 3, backboard 21 comprises that still a base plate 211 and is by the upwardly extending backboard sidewall 212 of the periphery of base plate 211, so that support component 221,222,223 and 224, reflector plate 23, light-emitting diode light bar 24, LGP 25, conducting strip 26 and optical diaphragm group 27 are contained in wherein.
Again as shown in Figure 2, backboard 21 be shaped as rectangle, and four support components 221,222,223 and 224 are arranged at four corners of the base plate 211 of backboard 21 respectively.So, four support components 221,222,223 and 224 supporting reflex sheets 23 make to be gripped with an air layer 28 between reflector plate 23 and the backboard 21, as shown in Figure 3 on the base plate 211 of backboard 21.In addition, aforesaid light-emitting diode light bar 24 is arranged on the backboard sidewall 212, and LGP 25 and optical diaphragm group 27 are arranged on the reflector plate 23 in regular turn.
And because air is a kind of medium of thermal conductivity extreme difference, so air layer 28 can make and conduct in the heat energy of backboard 21 and can't conduct to reflector plate 23 via air layer 28 as a thermal insulation layer.Be noted that, though backlight module of the present utility model has four support components 221,222,223 and 224 in Fig. 2, but the number of these support components is not as limit, backlight module of the present utility model can also be according to different types of application, as when being applied to a large scale liquid crystal TV, and has the support component of different numbers.Generally speaking, the number of these support components is preferable between 4 to 8.On the other hand, these support components are to be made of the relatively poor material of thermal conductivity, as plastics, make heat energy conduct in these support components than difficulty.
As previously mentioned, optical diaphragm group 27 is to be arranged on the LGP 25, so that the light that upwards penetrates from LGP 25 is modulated, makes the intensity of light source that backlight module of the present utility model provided distribute more even.In addition, backlight module of the present utility model can also comprise the conducting strip 26 on the base plate 211 that is arranged at backboard 21, and the heat energy that produces with light-emitting diode light bar 24 running the time promptly is distributed to the entire portion of backboard 21.Conducting strip 26 is preferably a graphite flake, and preferable measure-alike with reflector plate 23 of its size.
And when the liquid crystal indicator of backlight module of the present utility model is used in installation one, as shown in Figure 3, one liquid crystal panel 31 is the tops that are arranged at aforesaid optical diaphragm group 27, and a upper ledge 32 is arranged at the top of liquid crystal panel 31 and backboard 21, upper ledge 32 also has upper ledge sidewalls 321 that engage mutually with the backboard sidewall 212 of backboard 21, with aforesaid each element (four support components 221,222,223 and 224, reflector plate 23, light-emitting diode light bar 24, LGP 25, conducting strip 26, optical diaphragm group 27 and liquid crystal panel 31) be fixed in the backboard 21.
So when this liquid crystal indicator running, aforesaid light-emitting diode light bar 24 with a plurality of light emitting diodes 241 just can be constantly with backboard sidewall 212 and the base plate 211 of these light emitting diode 241 thermal energy conduction that produce to backboard 21.And, because backboard 21 is to be made of the preferable metal of thermal conductivity, as aluminium, so just these heat energy can little by little be distributed to the entire portion of backboard 21.In addition, because backlight module of the present utility model comprises that also one is arranged at the conducting strip 26 of the base plate 211 of backboard 21, make these heat energy can more promptly be distributed to the entire portion of backboard 21, and can not cause the phenomenon of backboard temperature distributing disproportionation.
On the other hand, as previously mentioned, because four support components 221,222,223 of backlight module of the present utility model and 224 supporting reflex sheets 23 are in base plate 211 tops of backboard 21 and make and be gripped with an air layer 28 between reflector plate 23 and the backboard 21, and these four support components 221,222,223 and 224 are to be made of the relatively poor material of thermal conductivity, as plastics.So when one uses the liquid crystal indicator running of backlight module of the present utility model, those heat energy that conduct in backboard 21 can't conduct to reflector plate 23, more can not conduct to be positioned at more LGP 25, optical diaphragm group 27 and the liquid crystal panel 31 of top position.So, even if after using for a long time, the temperature of the liquid crystal panel 31 of the LGP 25 of backlight module 2 of the present utility model, optical diaphragm group 27 and liquid crystal indicator still can maintain a lower scope, makes the optical characteristics of these elements too big change can not take place.So, the performance of backlight module 2 of the present utility model and the display performance of using the liquid crystal indicator of backlight module of the present utility model just can maintain a stable state and unlikely decline.
Tabulating down 1 is to show after known liquid crystal indicator operates a period of time (2 hours), measures the statistics of the resulting temperature data in a plurality of positions on backboard, LGP and the liquid crystal panel respectively.
Table 1
Minimum temperature Maximum temperature Mean temperature The height temperature difference Unit
Backboard 33.2 50.1 38.2 16.9
LGP 33.2 49.0 38.1 15.8
Liquid crystal panel 32.6 45.2 36.8 12.6
Tabulating down 2 is to show after the liquid crystal indicator of using backlight module of the present utility model operates the identical time (2 hours), measures the statistics of the resulting temperature data in a plurality of positions on backboard, LGP and the liquid crystal panel respectively.
Table 2
Minimum temperature Maximum temperature Mean temperature The height temperature difference Unit
Backboard 37.1 43.6 39.2 6.5
LGP 35.7 42.0 37.2 6.3
Liquid crystal panel 35.2 40.2 36.4 5.0
Can find out from above-mentioned table 1 and table 2, in the liquid crystal indicator of using backlight module of the present utility model, not only the maximum temperature of LGP and liquid crystal panel significantly is lower than the maximum temperature of the LGP and the liquid crystal panel of known liquid crystal indicator, and the height temperature difference of representation temperature distribution situation also is smaller than the height temperature difference of three elements (backboard, LGP and liquid crystal panel) of using known liquid crystal indicator significantly at three elements (backboard, LGP and liquid crystal panel).
That is to say that in the liquid crystal indicator of using backlight module of the present utility model, the temperature of LGP and liquid crystal panel is not only lower, and the Temperature Distribution of two elements is also comparatively even.Therefore, through after the use of identical time, the optical characteristics of using the LGP of liquid crystal indicator of backlight module of the present utility model and liquid crystal panel still can be kept stable, and its optical characteristics distributes also comparatively even.So, this display performance of using the liquid crystal indicator of backlight module of the present utility model just can maintain a stable state and unlikely decline.
In addition, in backlight module of the present utility model, four support components 221,222,223 and 224 all can be fixed in the base plate 211 or the backboard sidewall 212 of backboard 21 in any manner.As shown in Figure 2, these four support components 221,222,223 and 224 are base plate 211 or the backboard sidewalls 212 that are fixed in backboard 21 in two kinds of different modes.
Below, will cooperate Fig. 4 A, Fig. 4 B, Fig. 5 A and two kinds of different support component fixed forms of Fig. 5 B narration.Wherein, Fig. 4 A and Fig. 4 B show that the support component 221 of the area B that is arranged in Fig. 2 is the schematic diagram that is fixed in the backboard sidewall 212 of backboard 21 in the mode of " pin is chimeric ", and Fig. 5 A and Fig. 5 B show that then the support component 223 of the zone C that is arranged in Fig. 2 is the schematic diagram that the mode of " screw locking " is fixed in the base plate 211 of backboard 21.
Shown in Fig. 4 A, support component 221 has a pin 226 in its side surface 225, and the backboard sidewall 212 of backboard 21 then has a breach 213, and the shape of breach 213 be with the pin 226 of support component 221 in correspondence with each other.The person of connecing, shown in Fig. 4 B, when support component 221 was placed on the base plate 211 of backboard 21, because the pin 226 of support component 221 can be chimeric in correspondence with each other with the breach 213 of backboard 21, support component 221 just can be fixed in the backboard sidewall 212 of backboard 21 easily.
On the other hand, shown in Fig. 5 A, support component 223 has a screw 228 in its supporting surface 227, and the base plate 211 of backboard 21 also has a screw 214, and both screw threads are all corresponding to a fixed screw 215.The person of connecing, shown in Fig. 5 B, be placed on the base plate 211 of backboard 21 at support component 223 after, just fixed screw 215 is locked aforesaid screw 214 and screw 228 in regular turn.So, support component 223 is fixed in the base plate 211 of backboard 21.
Therefore, in backlight module of the present utility model, four support components 221,222,223 and 224 all can be fixed in the base plate 211 or the backboard sidewall 212 of backboard 21 easily, with the manufacture process of simplifying backlight module of the present utility model and shorten and make the required time of backlight module of the present utility model.
In sum because backlight module of the present utility model has the support component of a plurality of its reflector plates of support, the reflector plate of backlight module of the present utility model can and backboard between keep a segment distance, promptly be gripped with an air layer between reflector plate and the backboard.In addition, because air is a kind of medium of thermal conductivity extreme difference, and these support components are to be made of the relatively poor material of thermal conductivity, as plastics, so when one uses the liquid crystal indicator running of backlight module of the present utility model, the heat energy that luminescence unit produced only can conduct in backboard, and can upwards not conduct to reflector plate.So, after long-time the use, the temperature of LGP, optical diaphragm group and the liquid crystal panel of the liquid crystal indicator of one application backlight module of the present utility model still can maintain a lower scope, makes the optical characteristics of these elements that too big change can't take place.On the other hand, even if because after the long use of backlight module of the present utility model process, its original position still can be kept in the position of its each element, makes the optical characteristics of backlight module of the present utility model still can keep stable.Therefore, the liquid crystal indicator of aforesaid application backlight module of the present utility model is through after using for a long time, and its display performance still can surely be held in a stable state, and the decline that can't reply can not take place.
The foregoing description only is to give an example for convenience of description, and the interest field that the utility model is advocated should be as the criterion so that the claim scope is described certainly, but not only limits to the foregoing description.

Claims (12)

1, a kind of backlight module is characterized in that, comprising:
One backboard has a plurality of sidewalls;
A plurality of support components are arranged on the joint of these a plurality of sidewalls; And
One reflector plate is arranged on these a plurality of support components.
2, backlight module as claimed in claim 1 is characterized in that, wherein these a plurality of support components are embedded in the sidewall of this backboard, to be fixed on this backboard.
3, backlight module as claimed in claim 1 is characterized in that, wherein each these a plurality of support component utilizes a screw to be fixed on this backboard.
4, backlight module as claimed in claim 1 is characterized in that, also comprises a conducting strip that is arranged at this backboard.
5, backlight module as claimed in claim 4 is characterized in that, wherein this conducting strip is folded between this backboard and this reflector plate.
6, backlight module as claimed in claim 4 is characterized in that, wherein this conducting strip is a graphite flake.
7, backlight module as claimed in claim 4 is characterized in that, wherein the size of this conducting strip and this reflector plate is measure-alike.
8, backlight module as claimed in claim 1 is characterized in that, also comprises a luminescence unit.
9, backlight module as claimed in claim 8 is characterized in that, wherein this luminescence unit is a light-emitting diode light bar.
10, backlight module as claimed in claim 9 is characterized in that, wherein this light-emitting diode light bar has a plurality of light emitting diodes.
11, backlight module as claimed in claim 8 is characterized in that, wherein this luminescence unit is arranged at this a plurality of sidewalls.
12, backlight module as claimed in claim 1 is characterized in that, also comprises an optical diaphragm group that is positioned on this reflector plate.
CNU2008201766732U 2008-11-10 2008-11-10 Backlight module Expired - Fee Related CN201314496Y (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012012991A1 (en) * 2010-07-30 2012-02-02 深圳市华星光电技术有限公司 A resilient clamping part and liquid crystal module having the same
CN102458057A (en) * 2010-10-22 2012-05-16 富泰华工业(深圳)有限公司 Electronic device
CN102799023A (en) * 2012-09-11 2012-11-28 深圳市华星光电技术有限公司 Liquid crystal display (LCD) device
CN102997132A (en) * 2012-11-19 2013-03-27 京东方科技集团股份有限公司 Backlight source and display device
TWI401388B (en) * 2009-12-24 2013-07-11 Au Optronics Corp Light source holder and light source module, back light module and liquid crystal display having the same
US8564734B2 (en) 2010-07-30 2013-10-22 Shenzhen China Star Optoelectronics Technology Co., Ltd. Resilient engaging member and liquid crystal display module having the same
US9030642B2 (en) 2012-09-11 2015-05-12 Shenzhen China Star Optoelectronics Technology Co., Ltd. Liquid crystal display device
CN111638615A (en) * 2020-06-12 2020-09-08 武汉华星光电技术有限公司 Backlight module and liquid crystal display device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI401388B (en) * 2009-12-24 2013-07-11 Au Optronics Corp Light source holder and light source module, back light module and liquid crystal display having the same
WO2012012991A1 (en) * 2010-07-30 2012-02-02 深圳市华星光电技术有限公司 A resilient clamping part and liquid crystal module having the same
US8564734B2 (en) 2010-07-30 2013-10-22 Shenzhen China Star Optoelectronics Technology Co., Ltd. Resilient engaging member and liquid crystal display module having the same
CN102458057A (en) * 2010-10-22 2012-05-16 富泰华工业(深圳)有限公司 Electronic device
CN102799023A (en) * 2012-09-11 2012-11-28 深圳市华星光电技术有限公司 Liquid crystal display (LCD) device
CN102799023B (en) * 2012-09-11 2015-02-04 深圳市华星光电技术有限公司 Liquid crystal display (LCD) device
US9030642B2 (en) 2012-09-11 2015-05-12 Shenzhen China Star Optoelectronics Technology Co., Ltd. Liquid crystal display device
CN102997132A (en) * 2012-11-19 2013-03-27 京东方科技集团股份有限公司 Backlight source and display device
CN111638615A (en) * 2020-06-12 2020-09-08 武汉华星光电技术有限公司 Backlight module and liquid crystal display device

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090923

Termination date: 20171110

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