CN201341256Y - Backlight module and luminescent device thereof - Google Patents
Backlight module and luminescent device thereof Download PDFInfo
- Publication number
- CN201341256Y CN201341256Y CNU2008201845024U CN200820184502U CN201341256Y CN 201341256 Y CN201341256 Y CN 201341256Y CN U2008201845024 U CNU2008201845024 U CN U2008201845024U CN 200820184502 U CN200820184502 U CN 200820184502U CN 201341256 Y CN201341256 Y CN 201341256Y
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- light
- backlight module
- emitting device
- module according
- drive circuit
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Abstract
The utility model discloses a backlight module and a luminescent device thereof. The luminescent device comprises: a substrate with a first surface; an electric contact member which is electrically connected to a power supply; a diode driving circuit which is electrically connected to the electric contact member; and a light-emitting unit which is electrically connected between the electric contact member and the diode driving circuit; wherein, the electric contact member, the diode driving circuit and the light-emitting unit are jointed on the first surface of the substrate.
Description
Technical field
The utility model relates to a kind of backlight module and light-emitting device thereof, relates in particular to a kind of good backlight module and light-emitting device thereof that electrically connects that keep.
Background technology
Along with LCD (Liquid Crystal Display, LCD) extensive use in TV, monitor, notebook computer, mobile phone, PDA electronic products such as (Personal Digital Assistant), the demand that is used for the backlight module of liquid crystal display illumination grows with each passing day.Because liquid crystal itself is not light-emitting component, need provide evenly and the light source of high brightness makes that liquid crystal panel can normal display image by backlight module, so the performance quality of backlight module can directly have influence on show picture and display quality.Also therefore, backlight module has become liquid crystal display and one of most important key part and component of plate.
Figure 1A shows the schematic top plan view of conventional backlight module, wherein said backlight module with light-emitting diode as light source.Described backlight module 10 comprises bearing frame 11, light source 12, electric connector 13, support plate 14, light guide plate 15 and drive circuit board 16.Described light source 12 has a plurality of light-emitting diodes 121, and it is arranged on the described support plate 14.Described electric connector 13 has a plurality of input terminals that are connected in power end and are used to receive the drive signal of these a plurality of light-emitting diodes 121, and it is arranged on the described support plate 14.Described support plate 14 is arranged on the inner surface of described bearing frame 11, and a side of described support plate 14 contacts with the inner surface 111 of described bearing frame 11.Described light source 12 contiguous sides 151 that are arranged at described light guide plate 15 make light to inject described light guide plate 15 from the incidence surface 151 of described light guide plate 15 sides.
In Figure 1A, described drive circuit board 16 is arranged at the another side of described light guide plate 15, and it can be configured for use in the drive signal of these light-emitting diodes 121 of output.
With reference to Figure 1B, it shows an embodiment of described drive circuit board 16.Described drive circuit board 16 has a plurality of driver elements 17 and an electric connector 18.These driver elements 17 have booster circuit 171, diode drive circuit 172 and passive component district 173.Described booster circuit 171 is configured for use in adjusts supply voltage to the required voltage of described backlight module 10, and described diode drive circuit 172 is configured for use in the generation drive signal.Described passive component district 173 is configured for use in a plurality of passive components is set, and for example resistor, capacitor and diode are so as to setting the Control Parameter of described diode drive circuit 172.In addition, described electric connector 18 has a plurality of terminals that are connected in power end and are used to export the drive signal of these light-emitting diodes 121.
Because the backlight module 10 of routine techniques needs booster circuit with changing voltage, described booster circuit occupies a space, thereby need be arranged on the described drive circuit board 16.When described drive circuit board 16 is produced except increasing extra get the raw materials ready cost and assembling manpower, when carrying out the electric connection of described support plate 14 and described drive circuit board 16, also to consider the allocation problem of lead, thereby can't reach the compact requirement of backlight module on the market.In sum, be necessary to provide a kind of cost that is applicable to the light-emitting device of backlight module with effective reduction circuit board assembling, and further realize the market demand of thin typeization.
The utility model content
The utility model can be realized effectively reducing the circuit board assembly cost and keep good electrically purpose of connecting.
The utility model discloses a kind of light-emitting device of backlight module, and described light-emitting device comprises: substrate, and it has first surface; Electric contact piece (electrical contact), it is electrically connected to power supply; Diode drive circuit, it comprises at least one driving element, and it is electrically connected at described electric contact piece; And luminescence unit, it is electrically connected between described electric contact piece and the described diode drive circuit; Wherein, described electric contact piece, described diode drive circuit and described luminescence unit are engaged in the first surface of described substrate.
The utility model discloses a kind of backlight module, and described backlight module comprises: light guide plate, and it has first side, second side, the 3rd side and four side; First light-emitting device, it is located at the described first side of described light guide plate, and described light-emitting device comprises: substrate, it has first surface; Electric contact piece, it is electrically connected to power supply; Diode drive circuit, it comprises at least one driving element, and it is electrically connected at described electric contact piece; And luminescence unit, it comprises a plurality of circuit of LED small pieces, and it is electrically connected between described electric contact piece and the described diode drive circuit; Wherein, described electric contact piece, described diode drive circuit and described luminescence unit are engaged in the first surface of described substrate.
Above sketch out technical characterictic of the present utility model and advantage are so that best understanding the utility model is hereinafter described in detail.Other technical characterictic and the advantage that constitute claims subject matter of the present utility model will be described in hereinafter.The utility model one of ordinary skill in the art should be appreciated that, hereinafter the notion of Jie Shiing can be used as the basis with specific embodiment and quite easily revised or design other structure or technology and realize the purpose identical with the utility model.The utility model one of ordinary skill in the art should also be clear that the structure of this type of equivalence can't break away from the spirit and scope of the present utility model that appended claims proposes.
Description of drawings
Figure 1A is the schematic top plan view of conventional backlight module;
Figure 1B shows an embodiment of described drive circuit board;
Fig. 2 shows the light-emitting device of backlight module of the present utility model;
Fig. 3 shows the circuit diagram of light-emitting device of the present utility model; And
The different embodiment of Fig. 4 A-4E display backlight module.
Embodiment
For the ease of better understanding the utility model, now elaborate in conjunction with preferred embodiment of the present utility model.
Fig. 2 shows the light-emitting device of backlight module of the present utility model.Described light-emitting device 20 has substrate 21, electric contact piece 22, diode drive circuit 23 and luminescence unit 24.Described substrate 21 has first surface and second surface, wherein said first surface is configured for use in the described light-emitting device 20 of carrying, described second surface contacts with the contact-making surface of back of the body frame with respect to described first surface, and the described way of contact can use thermal paste or other sticker described second surface is adhered to described back of the body frame.The strip printed circuit substrate that described substrate 21 can be a single or multiple lift.The power supply that provides described light-emitting device 20 required is provided described electric contact piece 22, and wherein said electric contact piece 22 can be electric connector, solder joint or a pad.Described diode drive circuit 23 electrically connects with described luminescence unit 24, so as to exporting the drive signal of described luminescence unit 24.Described diode drive circuit 23 comprises driving element 231 and passive component 232, chip wherein after circuit small pieces that wherein said driving element 231 can be a un-encapsulated and the encapsulation, and described passive component 232 can be capacitor, resistor, diode or its combination.In the present embodiment, use the drive circuit small pieces of un-encapsulated can significantly reduce whole thickness and shared area thereof.In addition, described diode drive circuit 23 can further comprise active element 233, and wherein said active element 233 can be a switch element, and it can be realized by transistor or diode.Described passive component 232 or active element 233 electrically connect with described driving element 231, and described diode drive circuit 23 is arranged at the first surface of described substrate 21.
Above-mentioned luminescence unit 24 comprises a plurality of circuit of LED small pieces 241.In the present embodiment, these circuit of LED small pieces 241 are the circuit small pieces that can send white light.In other embodiments, these circuit of LED small pieces 241 are circuit small pieces or its combinations that can send redness, green, blueness or other color light.241 first surfaces that are not arranged at described substrate 21 of described a plurality of circuit of LED small pieces, its quantity and arrangement mode can change according to the demand of display floater.Above-mentioned " setting " term is meant that modes such as using surface encapsulation, flip-chip, projection or routing joint engages with described substrate 21.Behind joint action, encapsulant can put on these circuit of LED small pieces 241 and described driving element 231 tops, is subjected to extraneous humidity and contaminating impurity to prevent these circuit small pieces.
The circuit diagram of the light-emitting device of Fig. 3 display backlight module.With reference to Fig. 3, described luminescence unit 24 is composed in series luminous row 31 by a plurality of circuit of LED small pieces 241, again by a plurality of luminous row 31 connections parallel with one another to constitute described luminescence unit 24.Each luminous row 31 is connected to fixed voltage V
CC, make described luminescence unit 24 form light-emitting device.Described luminescence unit 24 is controlled by driving element 32, and wherein, described driving element 32 comprises that a plurality of output OUT1 are to OUT12, power end V
DD, earth terminal GND, control end R
EXTAnd enable and hold EN.
Described driving element 32 is via described power end V
DDAnd described earth terminal GND and provide chip internal required current potential.Simultaneously, first resistor 33, capacitor 34 and Zener diode 35 are connected to described power end V
DDWith burning voltage.Described control end R
EXTBe connected to second resistor 36 and flow through the electric current of described luminescence unit 24 with adjustment, its purpose is to control the brightness of described luminescence unit 24.The described end EN that enables is connected to actuated signal EN_HIGH, so as to activating the output of these outputs OUT1 to OUT12.In the present embodiment, above-mentioned diode drive circuit 23 has driving element, in other embodiments, above-mentioned diode drive circuit 23 has a plurality of driving elements, indivedual and a plurality of circuit of LED small pieces 241 of these driving elements electrically connect, and are arranged at the both sides of the first surface of described substrate 21 respectively.Yet these driving elements also can be evenly or are distributed in the first surface of described substrate 21 unevenly.In this article, to be guide line be electrically connected with the circuit in the intermediate layer of described second surface via the first surface of described substrate 21, second surface or between described first surface with layout type described " electric connection " term.
Fig. 4 A shows the different embodiment of a kind of backlight module of the present utility model to 4E.Described backlight module 40 has the light guide plate 42 and first light-emitting device 41.Described light guide plate 42 has first side, second side, the 3rd side and four side.Shown in Fig. 4 A, described first light-emitting device 41 is located at arbitrary side of described light guide plate 42, and sends light source in described light guide plate 42, by described light guide plate 42 with the light source scattering so that all area sources of even high brightness of liquid crystal panel to be provided.
Along with the increase of panel size, light-emitting device can be according to the panel size size at two above light-emitting devices of different sides configuration of light guide plate 42, so as to reaching the effect that brightness promotes.In an embodiment of the present utility model, shown in Fig. 4 B, 4C, described backlight module 40 comprises two groups of light-emitting devices, wherein said first light-emitting device 41 is located at the first side of described light guide plate 42, and described second light-emitting device 43 is located at the second side of described light guide plate 42, and described second side is parallel or perpendicular to described first side.In another embodiment of the present utility model, backlight module 40 shown in Fig. 4 D comprises three groups of light-emitting devices: first light-emitting device 41, second light-emitting device 43 and the 3rd light-emitting device 44, it is located at first side, second side and the 3rd side of described light guide plate 42 respectively, wherein, described second side is parallel to described first side, and described the 3rd side is perpendicular to described first side.In an embodiment more of the present utility model, described backlight module 40 shown in Fig. 4 E comprises four groups of light-emitting devices: first light-emitting device 41, second light-emitting device 43, the 3rd light-emitting device 44 and the 4th light-emitting device 45, these light-emitting devices are located at four sides of described light guide plate 42 respectively.
Above disclosed technology contents of the present utility model and technical characterstic, yet the those skilled in the art still may be based on teaching of the present utility model and announcement and is made all substitutions and modifications that do not deviate from the utility model spirit.Therefore, protection range of the present utility model should be not limited to the content that embodiment discloses, but should comprise the various substitutions and modifications of the present utility model that do not deviate from, and is contained by this patent claims.
Claims (20)
1. the light-emitting device of a backlight module is characterized in that comprising:
Substrate, it has first surface and second surface;
Electric contact piece, it is electrically connected to power supply;
Diode drive circuit, it comprises driving element, and it is electrically connected at described electric contact piece; And
Luminescence unit, it is electrically connected between described electric contact piece and the described diode drive circuit;
Wherein, described electric contact piece, described diode drive circuit and described luminescence unit are engaged in the first surface of described substrate.
2. the light-emitting device of backlight module according to claim 1 is characterized in that wherein said driving element is the circuit small pieces of un-encapsulated.
3. the light-emitting device of backlight module according to claim 1 is characterized in that wherein said driving element is the chip after the encapsulation.
4. the light-emitting device of backlight module according to claim 1 is characterized in that wherein said diode drive circuit further comprises passive component.
5. the light-emitting device of backlight module according to claim 1 is characterized in that wherein said diode drive circuit further comprises active element.
6. the light-emitting device of backlight module according to claim 4 is characterized in that wherein said passive component is capacitor, resistor, diode or its combination.
7. the light-emitting device of backlight module according to claim 5 is characterized in that wherein said active element is a transistor.
8. the light-emitting device of backlight module according to claim 1 is characterized in that wherein said luminescence unit comprises a plurality of circuit of LED small pieces.
9. according to the light-emitting device of claim 2 or 8 described backlight modules, it is characterized in that it further comprises encapsulant, be used to be coated on described circuit of LED small pieces and described driving element.
10. the light-emitting device of backlight module according to claim 8 is characterized in that wherein said circuit of LED small pieces are composed in series at least one luminous row, is connected in parallel by described luminous row and constitutes described luminescence unit.
11. the light-emitting device of backlight module according to claim 1 is characterized in that wherein said at least one driving element is arranged at individually on the both sides of first surface of described substrate.
12. the light-emitting device of backlight module according to claim 1 is characterized in that the second surface of wherein said substrate is bonded in the back of the body frame of described backlight module with thermal paste.
13. the light-emitting device of backlight module according to claim 1 is characterized in that wherein said diode drive circuit comprises a plurality of driving elements, these driving elements are distributed on the first surface of described substrate equably.
14. the light-emitting device of backlight module according to claim 1 is characterized in that wherein said driving element comprises:
A plurality of outputs, it is electrically connected at described luminescence unit;
Power end, it is configured for use in and supplies power to described driving element;
Control end, it is electrically connected to resistor, and sets the electric current of the described luminescence unit of flowing through via described resistor;
And
Enable end, signal is enabled in its reception, so as to activating described a plurality of output.
15. a backlight module is characterized in that it comprises:
Light guide plate, it has first side, second side, the 3rd side and four side; And
First light-emitting device, it is located at the described first side of described light guide plate, and described first light-emitting device comprises:
Substrate, it has first surface;
Electric contact piece, it is electrically connected to power supply;
Diode drive circuit, it comprises at least one driving element, and it is electrically connected at described electric contact piece; And
Luminescence unit, it comprises a plurality of circuit of LED small pieces, and it is electrically connected between described electric contact piece and the described diode drive circuit;
Wherein, described electric contact piece, described diode drive circuit and described luminescence unit are engaged in the first surface of described substrate.
16. backlight module according to claim 15 is characterized in that it further comprises second light-emitting device, is located at the described second side of described light guide plate, described second side is parallel or perpendicular to described first side.
17. backlight module according to claim 15, it is characterized in that it further comprises the 3rd light-emitting device and the 4th light-emitting device, be located at the described second side and described the 3rd side of described light guide plate respectively, wherein said second side is parallel to described first side, and described the 3rd side is perpendicular to described first side.
18. backlight module according to claim 17 is characterized in that it further comprises the 4th light-emitting device, it is located at the four side of described light guide plate, and described four side is perpendicular to described first side.
19. backlight module according to claim 15 is characterized in that the chip after circuit small pieces that wherein said at least one driving element is a un-encapsulated or the encapsulation.
20. backlight module according to claim 15 is characterized in that wherein said at least one driving element is arranged at individually on the both sides of first surface of described substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201845024U CN201341256Y (en) | 2008-12-19 | 2008-12-19 | Backlight module and luminescent device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201845024U CN201341256Y (en) | 2008-12-19 | 2008-12-19 | Backlight module and luminescent device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201341256Y true CN201341256Y (en) | 2009-11-04 |
Family
ID=41236799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201845024U Expired - Fee Related CN201341256Y (en) | 2008-12-19 | 2008-12-19 | Backlight module and luminescent device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201341256Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012083768A1 (en) * | 2010-12-22 | 2012-06-28 | 深圳市长运通光电技术有限公司 | Led light source |
| WO2022022266A1 (en) * | 2020-07-27 | 2022-02-03 | 北京芯海视界三维科技有限公司 | Light-emitting module and display device |
-
2008
- 2008-12-19 CN CNU2008201845024U patent/CN201341256Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012083768A1 (en) * | 2010-12-22 | 2012-06-28 | 深圳市长运通光电技术有限公司 | Led light source |
| WO2022022266A1 (en) * | 2020-07-27 | 2022-02-03 | 北京芯海视界三维科技有限公司 | Light-emitting module and display device |
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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: 20091104 Termination date: 20141219 |
|
| EXPY | Termination of patent right or utility model |