CN201166763Y - Back light module unit and LCD device - Google Patents
Back light module unit and LCD device Download PDFInfo
- Publication number
- CN201166763Y CN201166763Y CNU2008200923670U CN200820092367U CN201166763Y CN 201166763 Y CN201166763 Y CN 201166763Y CN U2008200923670 U CNU2008200923670 U CN U2008200923670U CN 200820092367 U CN200820092367 U CN 200820092367U CN 201166763 Y CN201166763 Y CN 201166763Y
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- China
- Prior art keywords
- sidewall
- module backlight
- light
- guide plate
- light guide
- 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
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Abstract
The utility model provides a backlight module, which comprises a light guide plate; a circuit board which is adjacent to the light guide plate; at least one point light source disposed on the circuit board; a frame accommodating the light guide plate and the light source; and an adjusting device linking with the circuit board. The angle of the light emitted from the light source into the light guide plate is defined as an incident angle which is adjusted by the adjusting device. The backlight module has the advantages that the backlight intensity is adjustable. The utility model further provides a liquid crystal display device adopting the backlight module.
Description
Technical field
The utility model relates to a kind of module backlight and adopts the liquid crystal indicator of this module backlight.
Background technology
Because the liquid crystal itself in the display panels is not luminous, thereby, for reaching display effect, must provide a light supply apparatus, as module backlight, to realize Presentation Function to display panels.
Seeing also Fig. 1, is the three-dimensional exploded view of a kind of prior art module backlight.This module 100 backlight comprises a reflector plate 10, a glue frame 11, a lamp bar 12, a light guide plate 13, a diffusion sheet 14, one first blast sheet 15 and one second blast sheet 16.
This glue frame 11 comprises a first side wall 111, one second sidewall 112, one the 3rd sidewall 113 and one the 4th sidewall 114.This first side wall 111, this second sidewall 112, the 3rd sidewall 113 and the 4th sidewall 114 join end to end successively and surround a receiving space.This first side wall 111 and the 3rd sidewall 113 extend an extension 115 along its inwall to this receiving space respectively.The extension 115 of this first side wall 111 and the 3rd sidewall 113 matches with the end of the 4th sidewall 114 respectively and forms a groove 116, and this groove 116 is used to engage this lamp bar 12.
This lamp bar 12 comprises a circuit board 121 and a plurality of light emitting diode 122.These a plurality of light emitting diodes 122 are disposed in an evenly spaced relation in this circuit board 121 surfaces, and and these circuit board 121 electrical connections.This light emitting diode 122 comprises a light-emitting area 123, and this light-emitting area 123 is towards the direction setting away from this circuit board 121.
This light guide plate 13 comprises an incidence surface 131, an exiting surface 132 and a bottom surface 133.This exiting surface 132 and this bottom surface 133 are oppositely arranged, and this incidence surface 131 is adjacent with this exiting surface 132.
See also Fig. 2 and Fig. 3, Fig. 2 is the schematic perspective view after module backlight 100 assemblings shown in Figure 1, and Fig. 3 is the three-dimensional enlarged diagram of III part among Fig. 2.During assembling, the two ends of this circuit board 121 correspondence respectively are fastened on this groove 116, and its inside surface away from the surface of these light emitting diode 122 1 sides and the 4th sidewall 114 is close to mutually, thereby this lamp bar 12 is fixed in this glue frame 11.This light guide plate 13 is housed in the receiving space of this glue frame 11, and the light-emitting area 123 of its incidence surface 131 contiguous these a plurality of light emitting diodes 122 is provided with.This reflector plate 10 is arranged on bottom surface 133 1 sides of this light guide plate 13.This diffusion sheet 14, this first blast sheet 15 and this second blast sheet 16 are successively set on exiting surface 132 1 sides of this light guide plate 13, and the exiting surface 132 of these diffusion sheet 14 contiguous these light guide plate 13 is provided with.
When this module 100 backlight was worked, this light emitting diode 122 was by its light-emitting area 123 emergent raies.This light is injected in this light guide plate 13 by the incidence surface 131 of this light guide plate 13, part light penetrates from this exiting surface 132 by 13 guiding of this light guide plate, and another part light is penetrated by the bottom surface 133 of this light guide plate 13 after this reflector plate 10 reflections and then reenter this light guide plate 13 and penetrate from this exiting surface 132.Further successively after the effect of this diffusion sheet 14, this first blast sheet 15 and this second blast sheet 16, form a uniform surface light source from the light of these light guide plate 13 outgoing.
But circuit board 121 ends of this lamp bar 12 are fastened on the groove 116 of this glue frame 11, and this lamp bar 12 is fixed in this glue frame 11.This light emitting diode 122 is under the constant situation of its drive current, and the amount of light of its light-emitting area 123 is certain, thereby its light total amount of injecting this light guide plate 13 is a steady state value.That is to say that the light intensity of the area source that this module 100 backlight is provided is a fixed value, when the deepening of external environment light, the light intensity of the area source that this module 100 backlight is provided is excessive with respect to the surround lighting light intensity, and human eye can feel under the weather.
The utility model content
In order to solve the uncontrollable problem of light intensity backlight of prior art module backlight, be necessary to provide a kind of light intensity backlight adjustable module backlight.
Also be necessary to provide a kind of liquid crystal indicator that adopts above-mentioned module backlight.
A kind of module backlight, it comprises the circuit board of a light guide plate, contiguous this light guide plate, framework that at least one pointolite, that is arranged on this circuit board is accommodated this light guide plate and this at least one pointolite and one and the regulating device of this circuit board interlock.The angle that the light that definition is sent from this at least one pointolite enters this light guide plate is an incident angle, and this regulating device is regulated this incident angle.
A kind of liquid crystal indicator, it comprises a liquid crystal panel and one and the contiguous module backlight that is provided with of this liquid crystal panel.This module backlight comprises the circuit board of a light guide plate, contiguous this light guide plate, framework that at least one pointolite, that is arranged on this circuit board is accommodated this light guide plate and this at least one pointolite and one and the regulating device of this circuit board interlock.The angle that the light that definition is sent from this at least one pointolite enters this light guide plate is an incident angle, and this regulating device is regulated this incident angle.
Compared to prior art, above-mentioned module backlight and liquid crystal indicator are regulated the incident angle that this at least one pointolite enters this light guide plate by this regulating device, thereby regulate the light total amount that this at least one pointolite is injected this light guide plate, and realize adjusting light intensity backlight with this.When external environment light died down, this light intensity backlight of manual adjustments was to adapt to human eye perceives.
Description of drawings
Fig. 1 is the three-dimensional exploded view of a kind of prior art module backlight.
Fig. 2 is the schematic perspective view after the module assembling backlight shown in Figure 1.
Fig. 3 is the three-dimensional enlarged diagram of module III part backlight shown in Figure 2.
Fig. 4 is the inversion three-dimensional exploded view of the utility model module one better embodiment backlight.
Fig. 5 is the diagrammatic cross-section of module backlight shown in Figure 4 along the V-V line.
Fig. 6 is that module backlight shown in Figure 4 is along VI-VI line diagrammatic cross-section.
Fig. 7 is the schematic perspective view after the module assembling backlight shown in Figure 4.
Fig. 8 is the section enlarged diagram of this locating device and this rotating shaft in the module backlight shown in Figure 7.
Fig. 9 is the diagrammatic cross-section of module backlight shown in Figure 7 along the IX-IX line.
Figure 10 is the synoptic diagram after module rotating shaft backlight shown in Figure 7 is rotated counterclockwise the θ angle.
Figure 11 is turn clockwise a synoptic diagram after the θ angle of module rotating shaft backlight shown in Figure 7.
Figure 12 is the graph of relation of the anglec of rotation and the light intensity backlight of module rotating shaft backlight shown in Figure 7.
Figure 13 is the three-dimensional exploded view that adopts the liquid crystal indicator of module backlight shown in Figure 4.
Embodiment
Seeing also Fig. 4, is the inversion three-dimensional exploded view of the utility model module one better embodiment backlight.This module 200 backlight comprises that a glue frame 20, a knob 21, a lamp bar 22, one first blast sheet 23, one second blast sheet 24, a diffusion sheet 25, a light guide plate 26, a reflector plate 27 and accommodate frame 28.This accommodates frame 28 and this knob 21, this lamp bar 22, this first blast sheet 23, this second blast sheet 24, this diffusion sheet 25, this light guide plate 26 and this reflector plate 27 are accommodated in 20 cooperations of this glue frame.
This light guide plate 26 comprises an incidence surface 261, an exiting surface 262 and a bottom surface 263.This exiting surface 262 and this bottom surface 263 are oppositely arranged, and this incidence surface 261 is adjacent with this exiting surface 262.This is accommodated frame 28 and the surface zone that should lamp bar 22 is provided with an extinction adhesive tape (figure does not show) within it.
This glue frame 20 comprises a first side wall 201, one second sidewall 202, one the 3rd sidewall 203 and one the 4th sidewall 204.This first side wall 201, this second sidewall 202, the 3rd sidewall 203 and the 4th sidewall 204 join end to end successively and surround a receiving space.This first side wall 201, this second sidewall 202, the 3rd sidewall 203 and the 4th sidewall 204 respectively within it lateral edges extend an extension 205 to this receiving space, and these a plurality of extensions 205 define a display window.The zone of the 3rd sidewall 203 contiguous the 4th sidewalls 204 is provided with a through hole 206.This knob 21 can pass the 3rd sidewall 203 by this through hole 206.These two locating devices 207 are extended internally by the 4th sidewall 204 and form, and are respectively adjacent to this first side wall 201 and 203 settings of the 3rd sidewall.
Seeing also Fig. 5, is along the diagrammatic cross-section of V-V line among Fig. 4.These two locating devices 207 are symmetrical structure and are resilient material.This locating device 207 comprises a body 208 and one first groove 209.This body 208 comprises a projection 210.This first groove 209 be arranged on this body 208 away from the 4th sidewall 204 1 sides.This first groove 209 comprises a major trough body 211 and an opening 212.The xsect of this major trough body 211 is that a part is cylindrical.Wherein, the radius of major trough body 211 xsects of this first groove 209 is r, and the height of this projection 210 is h, and the width of this opening 212 is r '.
Seeing also Fig. 6, is along the diagrammatic cross-section of VI-VI line among Fig. 4.This lamp bar 22 comprises a circuit board 221, a plurality of light emitting diode 222 and a rotating shaft 223.These a plurality of light emitting diodes 222 are disposed in an evenly spaced relation in the first type surface of this circuit board 221, and and these circuit board 221 electrical connections.This light emitting diode 222 comprises a light-emitting area 224, and this light-emitting area 224 is towards the first type surface setting away from this circuit board 221.The emergent ray of this light-emitting area 224 has certain limit, and it penetrates angular range is 2 α.The angle that the light that definition is sent from this light emitting diode 222 enters this light guide plate 26 is an incident angle.This rotating shaft 223 is a cylindrical structure, and it is fixed on the back side of this circuit board 221, and by insulating tape and this circuit board 221 electric insulations.The same length of the 4th sidewall 204 of the length of this rotating shaft 223 and this glue frame 20.This rotating shaft 223 comprises a plurality of second grooves 225 and a blind hole 226, and these a plurality of second grooves 225 are V-shaped groove, and it evenly is arranged on the main part of this rotating shaft 223.This blind hole 226 is arranged on the corresponding end of this rotating shaft 223 and this through hole 206, and its axially extending internally along this rotating shaft 223.These knob 21 engagings also are fixed in this blind hole 226, to realize the rotation by 21 these rotating shafts 223 of control of this knob.
The radius of these rotating shaft 223 xsects is R, and the axle center of this rotating shaft 223 to the distance of this second groove 225 is R ', and this first groove 209 satisfies following relational expression (1) and (2) with the relation of this rotating shaft 223,
r′＜2R (1)
R＜R′+h≤r (2)
See also Fig. 7 to Fig. 9, Fig. 7 is the schematic perspective view after these module backlight 200 assemblings, and Fig. 8 is the section enlarged diagram of this locating device 207 and this rotating shaft 223 among Fig. 7, and Fig. 9 is along the diagrammatic cross-section of IX-IX line among Fig. 7.
This module 200 backlight can be assembled according to the following steps:
The first step is positioned at this two locating device 207 with this lamp bar 22.Particularly, apply the opening 212 that external force makes these rotating shaft 223 these first grooves 209 of extruding, make this rotating shaft 223 clamp-on this first groove 209 thereby elastic dilatation takes place this opening 212.Second groove 225 of this rotating shaft 223 and the projection 210 of this locating device 207 match.
Second step was housed in this first blast sheet 23, this second blast sheet 24, this diffusion sheet 25, this light guide plate 26 and this reflector plate 27 in the receiving space of this glue frame 20 successively, and the exiting surface 262 of these diffusion sheet 25 contiguous these light guide plate 26 is provided with.
The 3rd goes on foot, and this glue frame 20 is engaged and is housed in this accommodate frame 28.
In the 4th step, this knob 21 is passed this through hole 206 also engage mutually by blind hole 226 and this rotating shaft 223 of this rotating shaft 223.And 222 of this light guide plate 26 and this light emitting diodes exist certain space to be rotated to allow this lamp bar 22.Wherein, the light-emitting area 224 of incidence surface 261 contiguous these light emitting diodes 222 of this light guide plate 26 is provided with.
This module 200 backlight is when normal operating conditions, and the light-emitting area 224 of this light emitting diode 222 is also parallel with it towards the incidence surface 261 of this light guide plate 26.The light that this moment, this light emitting diode 222 penetrated is injected in this light guide plate 26 by the incidence surface 261 of this light guide plate 26, and a part of light penetrates from this exiting surface 262 by these light guide plate 26 guiding.After another part light is penetrated by the bottom surface 263 of this light guide plate 26, through these reflector plate 27 reflections and then reenter this light guide plate 26 and penetrate from this exiting surface 262.This emergent ray further successively after the effect of this diffusion sheet 25, this second blast sheet 24 and this first blast sheet 23, converts the light distribution uniform surface light source to.
When the deepening of external environment light, the light intensity of the area source that can provide by 21 pairs of these modules 200 backlight of this knob is adjusted.When this knob 21 was applied rotation external force, this rotating shaft 223 was rotated in this first groove 209 by this projection 210 of extruding.When the external force that is applied to this knob 21 was cancelled, this projection 210 was housed in this second groove 225, so that this rotating shaft 223 is positioned in this first groove 209.
See also Figure 10 and Figure 11, Figure 10 is the synoptic diagram after this rotating shaft 223 is rotated counterclockwise the θ angle.Figure 11 is turn clockwise a synoptic diagram after the θ angle of this rotating shaft 223.When this rotating shaft 223 when being rotated counterclockwise the θ angle, some light of the emergent ray of these a plurality of light emitting diodes 222 is injected on the extension 205 of this glue frame 20 and by this extension 205 and is absorbed.Therefore this light emitting diode 222 light total amount of injecting this light guide plate 26 reduces, and the light intensity decreasing of the area source that this module 200 backlight is provided that is to say that light intensity backlight dies down.When these rotating shaft 223 edges turned clockwise the θ angle, some light of the emergent ray of these a plurality of light emitting diodes 222 was injected this and is accommodated on the frame 28, and was absorbed by this extinction adhesive tape of accommodating frame 28 inside surfaces, can realize that equally light intensity backlight dies down.
Seeing also Figure 12, is the graph of relation of this anglec of rotation θ and this light intensity backlight.When this anglec of rotation θ was 0, the emergent ray of these a plurality of light emitting diodes 222 was all injected in this light guide plate 26, at this moment, and light intensity maximum backlight.Along with the increase of this anglec of rotation θ, this light intensity backlight diminishes.When this anglec of rotation θ was 2 α, the emergent ray major part of these a plurality of light emitting diodes 222 is accommodated the extinction adhesive tape of frame 28 by this or the extension 205 of this glue frame 20 absorbs, and this moment, light intensity backlight obviously reduced.
Compared to prior art, this module 200 backlight provides this locating device 207 and this rotating shaft 223.This knob 21 passes this through hole 206, and cooperates this blind hole 226 and this rotating shaft 223 to fasten.Apply external force and rotate this knob 21, this rotating shaft 223 is rotated in this locating device 207, thereby controls the light total amount that this light emitting diode 222 is injected this light guide plate 26, and realizes adjusting light intensity backlight with this.When external environment light dies down, manually rotate these knob 21 adjustings light intensity backlight and die down, to be fit to human eye perceives.After adjusting was finished, this rotating shaft 223 was positioned in this locating device 207 by this projection 210, the area source stabilized intensity that this module 200 backlight provides.
It is described that module backlight 200 of the present utility model is not limited to above-mentioned embodiment, can be integrated in this circuit board 221 as this rotating shaft 223.This locating device 207 also can be arranged on the extension 205 of this glue frame 20.
Seeing also Figure 13, is the three-dimensional exploded view that adopts the liquid crystal indicator of above-mentioned module 200 backlight.This liquid crystal indicator 300 comprises a liquid crystal panel 30, a housing 31 and an above-mentioned module 200 backlight.This liquid crystal panel 30 and this module 200 backlight are oppositely arranged.
Compared to prior art, in this liquid crystal indicator 300, but the light intensity manual adjustments of this module 200 backlight, when external environment light is too weak, by regulating the light intensity of this module 200 backlight, the display brightness of this liquid crystal indicator 300 of may command.
Claims (10)
1. module backlight, it circuit board, at least one pointolite and that is arranged on this circuit board that comprises a light guide plate, this light guide plate of vicinity is accommodated the framework of this light guide plate and this at least one pointolite, the angle that the light that definition is sent from this at least one pointolite enters this light guide plate is an incident angle, it is characterized in that: this module backlight further comprises one and the incident angle regulating device of this circuit board interlock.
2. module backlight as claimed in claim 1 is characterized in that: this at least one pointolite is a light emitting diode.
3. module backlight as claimed in claim 1 is characterized in that: this circuit board is fixed or be integrated in to this regulating device.
4. module backlight as claimed in claim 1, it is characterized in that: this framework comprises a first side wall, one second sidewall, one the 3rd sidewall and one the 4th sidewall, this the first side wall, this second sidewall, the 3rd sidewall link to each other with the 4th sidewall and according to this respectively at its edge extension that absorbs the light that this at least one pointolite penetrates that extends internally out, one through hole is set, contiguous the 4th sidewall of this through hole on the 3rd sidewall.
5. module backlight as claimed in claim 4, it is characterized in that: this module backlight further comprises a knob and a location device, this knob links to each other with this regulating device by this through hole, and this locating device is arranged on this extension or the 4th sidewall, and this regulating device is positioned at this locating device.
6. module backlight as claimed in claim 5, it is characterized in that: this locating device comprises a body and one first groove, this body is fixed on the 4th sidewall or this extension, this first groove be positioned at this body away from the 4th sidewall or this extension one side, this body comprises a projection, and this regulating device is positioned at this locating device by this projection.
7. module backlight as claimed in claim 6 is characterized in that: this regulating device is a rotating shaft, and the main part of this rotating shaft is provided with a plurality of second grooves, and this second groove is a V-shaped groove, and this projection is housed in this second groove.
8. module backlight as claimed in claim 7, it is characterized in that: this first groove comprises a major trough body and an opening, this rotating shaft is a right cylinder, the xsect of this major trough body is that part is cylindrical, the width of this opening is less than the diameter of this rotating shaft xsect, and the diameter of this major trough body xsect is greater than the diameter of this rotating shaft xsect.
9. module backlight as claimed in claim 1 is characterized in that: this module backlight further comprises accommodates frame, and this accommodates the frame inside surface has light absorbent to zone that should at least one pointolite.
10. liquid crystal indicator, it comprises a liquid crystal panel and one and the contiguous module backlight that is provided with of this liquid crystal panel, it is characterized in that: this module backlight is the described module backlight of any claim item in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200923670U CN201166763Y (en) | 2008-02-29 | 2008-02-29 | Back light module unit and LCD device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200923670U CN201166763Y (en) | 2008-02-29 | 2008-02-29 | Back light module unit and LCD device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201166763Y true CN201166763Y (en) | 2008-12-17 |
Family
ID=40192153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200923670U Expired - Fee Related CN201166763Y (en) | 2008-02-29 | 2008-02-29 | Back light module unit and LCD device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201166763Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956909A (en) * | 2009-07-17 | 2011-01-26 | 奇美电子股份有限公司 | Light source, backlight module using same, and liquid crystal display device using same |
| CN102072442A (en) * | 2011-01-17 | 2011-05-25 | 创维液晶器件(深圳)有限公司 | LED backlight module and liquid crystal module thereof and display equipment |
| CN102620192A (en) * | 2011-12-02 | 2012-08-01 | 友达光电股份有限公司 | Display device, backlight module thereof and assembling method of backlight module |
| CN102913816A (en) * | 2012-09-28 | 2013-02-06 | 京东方科技集团股份有限公司 | Sidelight type backlight module and liquid crystal display device |
| CN115407562A (en) * | 2022-09-26 | 2022-11-29 | 深圳市瀚达美电子有限公司 | Backlight source structure of vehicle-mounted TFT display screen |
-
2008
- 2008-02-29 CN CNU2008200923670U patent/CN201166763Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956909A (en) * | 2009-07-17 | 2011-01-26 | 奇美电子股份有限公司 | Light source, backlight module using same, and liquid crystal display device using same |
| CN102072442A (en) * | 2011-01-17 | 2011-05-25 | 创维液晶器件(深圳)有限公司 | LED backlight module and liquid crystal module thereof and display equipment |
| CN102620192A (en) * | 2011-12-02 | 2012-08-01 | 友达光电股份有限公司 | Display device, backlight module thereof and assembling method of backlight module |
| CN102620192B (en) * | 2011-12-02 | 2015-07-22 | 友达光电股份有限公司 | Display device, backlight module thereof and assembling method of backlight module |
| CN102913816A (en) * | 2012-09-28 | 2013-02-06 | 京东方科技集团股份有限公司 | Sidelight type backlight module and liquid crystal display device |
| US20140092344A1 (en) * | 2012-09-28 | 2014-04-03 | Beijing Boe Display Technology Co., Ltd. | Backlight Assembly And Liquid Crystal Display Device |
| JP2014072187A (en) * | 2012-09-28 | 2014-04-21 | Boe Technology Group Co Ltd | Backlight module and liquid crystal display device |
| US9223082B2 (en) * | 2012-09-28 | 2015-12-29 | Beijing Boe Display Technology Co., Ltd. | Backlight assembly and liquid crystal display device |
| CN115407562A (en) * | 2022-09-26 | 2022-11-29 | 深圳市瀚达美电子有限公司 | Backlight source structure of vehicle-mounted TFT display screen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081217 Termination date: 20160229 |
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| CF01 | Termination of patent right due to non-payment of annual fee |