CN202972768U - Liquid crystal display device and back light device - Google Patents
Liquid crystal display device and back light device Download PDFInfo
- Publication number
- CN202972768U CN202972768U CN 201220497514 CN201220497514U CN202972768U CN 202972768 U CN202972768 U CN 202972768U CN 201220497514 CN201220497514 CN 201220497514 CN 201220497514 U CN201220497514 U CN 201220497514U CN 202972768 U CN202972768 U CN 202972768U
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- pad
- lgp
- lighting device
- backboard
- light source
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Abstract
The utility model discloses a liquid crystal display device and a back light device. The back light device comprises a back plate, a heat dissipation pad, a light guide plate and a light source, wherein the back plate is provided with a fixing hole; the heat dissipation pad comprises a base plate, a back pad and a supporting table, the back pad and the supporting table are arranged on the same surface of the base plate, the base plate is provided with position adjusting holes, and the position adjusting holes and the supporting table are respectively located on the two sides of the back pad; the light guide plate is arranged on the back plate and is in lap joint with the supporting table; and the light source is arranged on the back pad, wherein, when the distance between the light source and the light guide plate is adjusted to a preset value via adjusting the position of the heat dissipation pad, a screw penetrates through the fixing hole and the position adjusting holes to lock and fix the heat dissipation pad on the back plate. According to the liquid crystal display device and the back light device, the distance between the light source and the light guide plate can be regulated accurately owing to the position adjusting holes formed in the heat dissipation pad.
Description
Technical field
The utility model is about a kind of liquid crystal indicator and back lighting device, particularly about back lighting device and the liquid crystal indicator of accurate control light source and LGP spacing.
Background technology
The features such as that liquid crystal indicator (LCD) has is slim, light weight, low power consumption are widely used in flat panel display.Its purposes enlarges year by year as the display unit such as mobile phone, portable-type information terminal machine (PDA), PC, TV.It should be noted that because liquid crystal molecule itself can't be luminous, therefore must provide liquid crystal panel required area source by backlight module, make liquid crystal panel reach the effect of demonstration, and obtain simultaneously enough brightness and contrast.
Backlight module is divided into two kinds of side-light type and straight-down negatives usually, and wherein, the backlight module of side-light type needs by LGP (light guide plate), light source is converted to the required area source of liquid crystal panel.Existing side-light backlight module mainly comprises backboard, light source, cooling pad and LGP, and light source is arranged on cooling pad, and cooling pad is fixed in backboard, and LGP is fixed in base plate and is oppositely arranged with light source.Existing backlight module faces two problems, and the one, heat dissipation problem, the 2nd, during the backlight module assembling, light source and LGP spacing are difficult to the effectively problem of control.As depicted in figs. 1 and 2, Fig. 1 is the stereogram of existing light source assembly, and Fig. 2 is the cutaway view of Fig. 1.Existing light source assembly 10 comprises cooling pad and light source 5, cooling pad comprises that base plate 1, back pad 2 and brace table 3 form, brace table 3 is in order to support the LGP that is oppositely arranged with light source 5, also comprise pre-determined bit hole 4 and fixing hole 6 on base plate, when being used for the assembling cooling pad, pre-determined bit hole 4 carries out pre-determined bit, fixing hole 6 is used for accurately fixing, and fixing hole 6 is circular hole, and light source 5 sticks or is locked on this back pad 2.When light source 5 work produces in a large number when hot, the cooling pad of metal material can quick heat radiating.the assembling sequence of existing backlight module is first light source 5 to be fixed in back pad 2, then cooling pad is fixed in backboard, afterwards LGP is stuck in backboard, before being positioned at due to fixed hole position 4 brace table 3 that supports LGP, therefore, after LGP is fixed in backboard, its position can not be adjusted again, in addition, LGP is to fix by interference structure with backboard, the position of LGP also can not be adjusted, cause the spacing between uncontrollable light source and LGP in existing backlight module assembling process, its spacing can only be subjected to build-up tolerance (+/-0.3mm) impact, and this spacing can affect the distribution trend of energy on the whole optical energy of backlight module and backlight module inner plane each point, thereby the backlight module that assembling is completed often can not meet design requirement by heavy industry because of pitch problems.
The utility model content
In view of this, the utility model provides a kind of back lighting device, and it comprises backboard, cooling pad, LGP and light source, and backboard has fixing hole; Cooling pad comprises base plate, back pad, brace table, and this back pad and brace table are arranged at the same face of this base plate, and this base plate has positioning hole, and this positioning hole and this brace table lay respectively at the both sides of this back pad; LGP is arranged on this backboard and is overlapped in this brace table; Light source is arranged on this back pad; Wherein, when the position of regulating this cooling pad made the spacing of this light source and this LGP be a predetermined value, screw passed this fixing hole and positioning hole so that this cooling pad is locked on this backboard.
As optional technical scheme, the scope of this predetermined value is [0.2,0.5] mm.
As optional technical scheme, this predetermined value is 0.2mm.
As optional technical scheme, this backboard also comprises the first location division, and this LGP has the second location division, and this first location division coordinates with this second location division to be fixed in this LGP on this backboard.
As optional technical scheme, this first location division is locating dowel, and this second location division is locating slot.
As optional technical scheme, this first location division is locating slot, and this second location division is locating dowel.
As optional technical scheme, this positioning hole be following one of them: elliptical aperture, irregularly-shaped hole or long slot bore.
As optional technical scheme, this base plate further comprises dodges mouth, and this is dodged mouth and is positioned at this positioning hole homonymy.
According to another specific embodiment, the utility model provides a kind of liquid crystal indicator, and it comprises above-mentioned back lighting device.
Back lighting device of the present utility model and assemble method thereof have better optical characteristics by in the accurately spacing between positioned light source and LGP of positioning hole is set on cooling pad than prior art.
Can be further understood by following utility model detailed description and institute's accompanying drawing about advantage of the present utility model and spirit.
Description of drawings
Fig. 1 is the stereogram of existing backlight assembly.
Fig. 2 is the cutaway view of Fig. 1.
Fig. 3 is the top view of cooling pad of the present utility model.
Fig. 4 is the cutaway view of Fig. 3.
Fig. 5 is that in the utility model back lighting device assembling process, cooling pad is assembled in schematic diagram on backboard.
Fig. 6 is the schematic diagram of accurate space distance control in the utility model back lighting device assembling process.
Fig. 7 is the schematic diagram after the assembling of the utility model back lighting device is completed.
The specific embodiment
The utility model provides a kind of back lighting device, and it comprises backboard, cooling pad, LGP and light source, and backboard has fixing hole; Cooling pad comprises base plate, back pad, brace table, and this back pad and brace table are arranged at the same face of this base plate, and this base plate has positioning hole, and this positioning hole and this brace table lay respectively at the both sides of this back pad; LGP is arranged on this backboard and is overlapped in this brace table; Light source is arranged on this back pad; Wherein, when the position of regulating this cooling pad made the spacing of this light source and this LGP be a predetermined value, screw passed this fixing hole and positioning hole so that this cooling pad is locked on this backboard.
Please refer to Fig. 3, Fig. 4 and Fig. 7, Fig. 3 is the top view of cooling pad of the present utility model, and Fig. 4 is the cutaway view of Fig. 3, and Fig. 7 is the schematic diagram after the assembling of the utility model back lighting device is completed.Provide back lighting device 100 in this specific embodiment, it comprises backboard 30, cooling pad 20, LGP 50 and light source 40.Backboard 30 has the fixing hole (not shown).Cooling pad 20 comprises base plate 21, back pad 22, brace table 23, this back pad 22 and brace table 23 are arranged at the same face of this base plate 21, this base plate 21 has positioning hole 24, positioning hole 24 setting corresponding to fixing hole, this positioning hole 24 can be elliptical aperture, irregularly-shaped hole or long slot bore, and this positioning hole 24 and this brace table 23 lay respectively at the both sides of this back pad 22.LGP 50 is arranged on this backboard 30 and is overlapped on this brace table 23, and light source 40 is arranged on this back pad 22 and is relative with LGP 50.Wherein, when the position of regulating this cooling pad 20 made the spacing of this light source 40 and this LGP 50 be a predetermined value, screw 70 passed this fixing hole and positioning hole 24 so that this cooling pad 20 is locked on this backboard 30 in the assembling process of back lighting device 100.
Please refer to Fig. 3 and Fig. 7, as optional technical scheme, this cooling pad further comprises dodges mouthfuls 26, dodging other interference mechanism on backboard 30, as the screw locking convex closure etc.Better to heat sink 20 pre-determined bit, pre-determined bit hole 25 can be set on heat sink 20 in order to assemble, on pre-determined bit hole 25 and backboard 30, corresponding pre-determined bit convex closure (not shown) coordinates heat sink 20 is carried out pre-determined bit.This backboard 30 also comprises the first location division 31, the first location division 31 can be locating dowel or locating slot, this LGP 50 has the second location division 51, the second location division 51 can be locating slot or locating dowel, and this first location division 31 coordinates with this second location division 51 to be fixed in this LGP 50 on this backboard 30.
Please be simultaneously with reference to Fig. 5, Fig. 6 and Fig. 7, Fig. 5 is that in the utility model back lighting device assembling process, cooling pad is assembled in schematic diagram on backboard, Fig. 6 is the accurate schematic diagram of space distance control in the utility model back lighting device assembling process.the assemble method of back lighting device 100 of the present utility model is as follows, the first step, cooling pad 20 is provided, this cooling pad 20 comprises base plate 21, back pad 22 and brace table 23, this back pad 22 and brace table 23 are arranged at the same face of this base plate 21, this base plate 21 has positioning hole 24, and this positioning hole 24 and this brace table 23 lay respectively at the both sides of this back pad 22, second step is arranged at light source 40 on this back pad 22, and the mode of setting can be gluing or screw locking, the 3rd goes on foot, and this cooling pad 20 is positioned over an inner side edge of backboard 30, and this backboard 30 has fixing hole (not shown) and boss 32, and this fixing hole arranges in positioning hole 24 is corresponding, and boss 32 is to support LGP 50, the 4th step, LGP 50 is arranged in this backboard 30 and is overlapped on the brace table 23 of cooling pad 20, the incidence surface of LGP 50 is relative with light source 40, this backboard 30 also comprises the first location division 31, this LGP 50 has the second location division 51, and this first location division 31 coordinates with this second location division 51 to be fixed in this LGP 50 on this backboard 30, the 5th step, when the position of regulating this cooling pad 20 makes the spacing of this light source 40 and this LGP 50 be a predetermined value, screw 70 passes this fixing hole and positioning hole 24 so that this cooling pad 20 is locked on this backboard 30, as shown in Figure 6, it is that the concrete grammar of a predetermined value is that the thin plate 60 that thickness equals this predetermined value is inserted between this light source 40 and this LGP 50 that the position of regulating this cooling pad 20 in the present embodiment makes the spacing of this light source 40 and this LGP 50, this cooling pad 20 is passed to the direction of LGP 50, make this light source 40 and this LGP 50 clamp this thin plate 60, like this accurate spacing between positioned light source 40 and LGP 50.As optional technical scheme, the scope of this predetermined value can be [0.2,0.5] mm, and preferably, this predetermined value is 0.2mm.The 6th step, after completing spacing between light source 40 and LGP 50 and regulating, screw is passed this fixing hole and positioning hole 24 takes out this thin plate 60 after being locked in this cooling pad 20 on this backboard 30, so, completed the accurate location assembling of back lighting device 100.
According to another specific embodiment, the utility model provides a kind of liquid crystal indicator, and it comprises above-mentioned back lighting device 100.
Back lighting device of the present utility model and assemble method thereof be the spacing between positioned light source and LGP accurately, the control accuracy of spacing can reach+/-0.05mm in, have better optical characteristics than prior art.
In sum, although the utility model discloses as above with embodiment, so it is not to limit the utility model.Have in technical field under the utility model and usually know the knowledgeable, within not breaking away from spirit and scope of the present utility model, when being used for a variety of modifications and variations.Therefore, protection domain of the present utility model is as the criterion with the scope that claim was defined.
Claims (9)
1. back lighting device, it comprises backboard, cooling pad, LGP and light source, it is characterized in that:
Backboard, it has fixing hole;
Cooling pad, it comprises base plate, back pad, brace table, and this back pad and brace table are arranged at the same face of this base plate, and this base plate has positioning hole, and this positioning hole and this brace table lay respectively at the both sides of this back pad;
LGP is arranged on this backboard and is overlapped in this brace table; And
Light source is arranged on this back pad;
Wherein, when the position of regulating this cooling pad made the spacing of this light source and this LGP be a predetermined value, screw passed this fixing hole and positioning hole so that this cooling pad is locked on this backboard.
2. back lighting device according to claim 1 is characterized in that: the scope of this predetermined value is [0.2,0.5] mm.
3. back lighting device according to claim 2, it is characterized in that: this predetermined value is 0.2mm.
4. back lighting device according to claim 1, it is characterized in that: this backboard also comprises the first location division, and this LGP has the second location division, and this first location division coordinates with this second location division to be fixed in this LGP on this backboard.
5. back lighting device according to claim 4, it is characterized in that: this first location division is locating dowel, this second location division is locating slot.
6. back lighting device according to claim 4, it is characterized in that: this first location division is locating slot, this second location division is locating dowel.
7. back lighting device according to claim 1 is characterized in that: this positioning hole be following one of them: elliptical aperture, irregularly-shaped hole or long slot bore.
8. back lighting device according to claim 1, it is characterized in that: this base plate further comprises dodges mouth, and this is dodged mouth and is positioned at this positioning hole homonymy.
9. a liquid crystal indicator, is characterized in that: comprise the back lighting device as any one claim in claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220497514 CN202972768U (en) | 2012-09-27 | 2012-09-27 | Liquid crystal display device and back light device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220497514 CN202972768U (en) | 2012-09-27 | 2012-09-27 | Liquid crystal display device and back light device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202972768U true CN202972768U (en) | 2013-06-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220497514 Expired - Lifetime CN202972768U (en) | 2012-09-27 | 2012-09-27 | Liquid crystal display device and back light device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202972768U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597623A (en) * | 2015-10-16 | 2017-04-26 | 青岛海尔滚筒洗衣机有限公司 | Computer board light guide device, assembly method, and washing machine |
-
2012
- 2012-09-27 CN CN 201220497514 patent/CN202972768U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597623A (en) * | 2015-10-16 | 2017-04-26 | 青岛海尔滚筒洗衣机有限公司 | Computer board light guide device, assembly method, and washing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |
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| CX01 | Expiry of patent term |