CN205385640U - LED circuit, circuit board that backlight was used and backlight thereof - Google Patents
LED circuit, circuit board that backlight was used and backlight thereof Download PDFInfo
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- CN205385640U CN205385640U CN201620196424.4U CN201620196424U CN205385640U CN 205385640 U CN205385640 U CN 205385640U CN 201620196424 U CN201620196424 U CN 201620196424U CN 205385640 U CN205385640 U CN 205385640U
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Abstract
The utility model discloses a LED circuit, circuit board that backlight was used and backlight thereof, this LED circuit include that the power, drive IC and the LED that connect gradually organize, LED group forms by at least two LED are parallelly connected, and the LED in this LED circuit and the circuit board adopts complete parallelly connected mode to connect, can effectively reduce the all -in resistance of backlight LED group, drives IC and need not to step up and to light in a poor lightly, has reduced the loss of energy in a poor light, circuit board that the backlight that adopts this LED circuit the was used circuit trace on can the simplified circuit board, that adopts the positive back walks the line comprehensively, further reduces the energy loss of backlight.
Description
Technical field
This utility model relates to field of liquid crystal display, particularly relates to the LED circuit of a kind of backlight, circuit board and backlight thereof.
Background technology
The LED lamp bar used on the backlight of current liquid crystal display is typically all and first several LED strip is joined, form little LED group, a big LED group is formed again by parallel for the little LED group of several series connection, then the mode of parallel connection is especially common in the equipment that some LED quantity are many again for this multiple LED strip connection, such as industrial, vehicle-mounted, panel computer etc..LED in the backlight internal circuit of this form is likely to common-anode or common cathode, and owing to resistance is higher, therefore the driving IC of corresponding backlight needs boosting, and to meet the requirement lighting backlight, booster circuit conversion efficiency is unable to reach 100%, amount energy loss.String hybrid circuit form is adopted due to LED, backlight FPC or PCB trace design complexity can be caused, when total number in parallel reaches 3 or is above, circuit trace on backlight FPC is by more complicated, particularly vehicle-mounted product, number of elements many (generally comprising critesistor, it is possible to have resistance, backward diode etc.), complicated cabling can cause that again the resistance of self becomes big, further loss of energy.
Utility model content
In order to solve above-mentioned the deficiencies in the prior art, this utility model provides the LED circuit of a kind of backlight, including the power supply being sequentially connected with, drives IC and LED group, and described LED group is formed in parallel by least two LED, and described LED group is formed in parallel by least two LED.This LED circuit resistance is little, drives IC without boosting, and the loss of electric energy is little.
This utility model additionally provides the circuit board of a kind of backlight employing above-mentioned LED circuit, and this circuit board trace is simple, and energy loss is little, and can realize the positive and negative cabling on circuit board.
This utility model additionally provides a kind of backlight employing foregoing circuit plate.
Technical problem to be solved in the utility model is achieved by the following technical programs:
The LED circuit of a kind of backlight, including the power supply being sequentially connected with, drives IC and LED group, and described LED group is formed in parallel by least two LED.
Can be connected by forward between power positive cathode with element, it is also possible to Opposite direction connection, or other connected modes.
The LED of backlight all adopts the mode of parallel connection to arrange, it is possible to greatly reduce the all-in resistance of LED group, drives IC to boost, can light backlight, and the LED in LED group shares same positive pole and negative pole.And LED adopts the circuit of this shared both positive and negative polarity, it is possible to simplify the circuit trace on FPC/PCB to greatest extent, reduce trace resistances, FPC/PCB whole utilizable space can be utilized during wiring, whole wiring.
A kind of circuit board of backlight, including substrate and the LED being arranged on substrate, described circuit board have employed above-mentioned LED circuit, on substrate, respectively distribution has the negative electrode of equal number and the LED pad of anode, one LED connects the LED pad of adjacent a pair negative electrode and anode, and the LED parallel connection on substrate forms an a common-anode A and common cathode K.
Further, the circuit board of described backlight can be FPC, it is also possible to be PCB.
After LED adopts full mode in parallel to connect, the positive and negative on substrate can be carried out whole wiring, and the gap between circuit is not less than 0.05mm, it is preferred to 0.15-0.2mm；LED pad adopts many pins to be connected with the circuit trace on substrate, and LED pin is by the via on substrate, it is possible to connect the positive and negative cabling of substrate.
Further, the negative electrode of described LED and anode can the same face of substrate or not on coplanar in parallel.
Further, described LED is formed common cathode K and common-anode A can at the same face upward wirings of substrate or at the not coplanar upward wiring of substrate.
The negative electrode of such as LED and anode can pass through printed circuit on substrate, it is achieved negative electrode and anode are in parallel on the front or the back side of substrate, or negative electrode is in front parallel connection, anode parallel connection overleaf etc.；The cabling of common-anode A and common cathode K can also be simultaneously located at front or the reverse side of substrate by printed circuit on substrate, the cabling of common cathode K can also be arranged on the front of substrate, the cabling of common-anode A is arranged on the reverse side of substrate, or the cabling of common cathode K is arranged on the reverse side of substrate, the cabling of common-anode A is arranged on the front etc. of substrate.
A kind of backlight, including framework and the light guide plate being arranged in framework, is provided with luminous source between described light guide plate and framework, described luminous source is connected to above-mentioned circuit board.
Further, described light guide plate is provided with reflector plate away from the side of exiting surface, the exiting surface of described light guide plate is provided with at least one of which blooming, described blooming is diffusion barrier or/and bright enhancement film, preferably, the blooming that the exiting surface of described light guide plate sets gradually is diffusion barrier, lower bright enhancement film and upper bright enhancement film, and described framework is provided with brake sack.
This utility model has the advantages that this LED circuit adopts mode in parallel for whole LED to connect, and resistance is little, drives IC without boosting, and the loss of electric energy is little；Employing the circuit board of the backlight of this LED circuit, cabling is simple, and energy loss is little, and can realize the positive and negative cabling on circuit board；The loss of the backlight energy employing this circuit board is little, more saves the energy.
Accompanying drawing explanation
The LED circuit of the backlight that Fig. 1 provides for this utility model；
The circuit board of the backlight that Fig. 2 provides for this utility model；
Fig. 3 is the front elevation of the cabling example one of the circuit board of the backlight of the novel offer of this use；
Fig. 4 is the back view of the cabling example one of the circuit board of the backlight of the novel offer of this use；
Fig. 5 is the front elevation of the cabling example two of the circuit board of the backlight of the novel offer of this use；
Fig. 6 is the back view of the cabling example two of the circuit board of the backlight of the novel offer of this use；
Fig. 7 is the front elevation of the cabling example three of the circuit board of the backlight of the novel offer of this use；
Fig. 8 is the back view of the cabling example three of the circuit board of the backlight of the novel offer of this use；
Fig. 9 is the front elevation of the cabling example four of the circuit board of the backlight of the novel offer of this use；
Figure 10 is the back view of the cabling example four of the circuit board of the backlight of the novel offer of this use；
Figure 11 is the front elevation of the cabling example five of the circuit board of the backlight of the novel offer of this use；
Figure 12 is the back view of the cabling example five of the circuit board of the backlight of the novel offer of this use；
Figure 13 is the front elevation of the cabling example six of the circuit board of the backlight of the novel offer of this use；
Figure 14 is the back view of the cabling example six of the circuit board of the backlight of the novel offer of this use.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model is described in detail.
As shown in Figure 1, a kind of LED circuit of backlight, including power supply, drive IC and LED group, positive source connects driving IC, negative pole connects LED group, described LED group is formed in parallel by least two LED, the element that power positive cathode connects is not limited to Fig. 1 mode, it is also possible to reverse or alternate manner arrangement.
The LED of backlight all adopts the mode of parallel connection to arrange, can greatly reduce the all-in resistance of LED group, resistance formula according to parallel circuit, LED quantity in parallel is more many, then the all-in resistance of LED group is more little, driving IC to boost, can light backlight, the LED in LED group shares same positive pole and negative pole.And LED adopts the circuit of this shared both positive and negative polarity, it is possible to simplify the circuit trace on circuit board to greatest extent, reduce trace resistances, circuit board whole utilizable space can be utilized during wiring, whole wiring.
As shown in Figure 2, a kind of circuit board of backlight, including substrate 1 and setting LED3 on substrate 1, described circuit board have employed the LED circuit described in Fig. 1, on substrate 1, respectively distribution has the negative electrode of equal number and the LED pad 2 of anode, one LED3 connects the LED pad 2 of adjacent a pair negative electrode and anode, and the LED3 parallel connection on substrate 1 forms an a common-anode A4 and common cathode k5.
The circuit board of described backlight can be FPC, it is also possible to be PCB.
After LED3 adopts full mode in parallel to connect, the positive and negative on substrate 1 can be carried out whole wiring, and the gap between circuit is not less than 0.05mm, it is preferred to 0.15-0.2mm；LED pad 2 adopts many pins to be connected with the circuit trace on substrate 1, and pin is by the via on substrate 1, it is possible to connect the positive and negative cabling of substrate 1.
As shown in figs. 3-14, the negative electrode of described LED and anode can the same face of substrate or not on coplanar in parallel by printed circuit, common cathode K and common-anode A that described LED is formed can pass through the printed circuit the same face upward wiring at substrate or the not coplanar upward wiring at substrate.
Such as, the cabling of the common cathode K and common-anode A of LED can be simultaneously located at the front of circuit board, and the negative electrode of LED and anode are each in parallel to (such as Fig. 3-4) on the back side of circuit board；Or the cabling of the common cathode K and common-anode A of LED can be simultaneously located at the back side of circuit board, the negative electrode of LED and anode are each in parallel to (such as Fig. 5-6) on the back side of circuit board；The negative electrode of LED is in parallel on the back side of circuit board, and common cathode K cabling is arranged on the back side of circuit board, and anode is in parallel in the front of circuit board, and common-anode A cabling is arranged on the front (such as Fig. 7-8) of circuit board；The anode of LED is in parallel on the back side of circuit board, and common-anode A cabling is arranged on the back side of circuit board, and negative electrode is in parallel in the front of circuit board, and common cathode K cabling is arranged on the front (such as Fig. 9-10) of circuit board；The anode of LED is in parallel in the front of circuit board, and common-anode A is at the front cabling of circuit board, and negative electrode is in parallel at the back side of circuit board, and common cathode K is at the front cabling (such as Figure 11-12) of circuit board；The anode of LED is in parallel at the back side of circuit board, and common-anode A is at the back side cabling of circuit board, and negative electrode is in parallel in the front of circuit board, and common cathode K is at the back side cabling (such as Figure 13-14) of circuit board.
A kind of backlight, including framework and the light guide plate being arranged in framework, it is provided with luminous source between described light guide plate and framework, described luminous source is connected to above-mentioned circuit board, described light guide plate is provided with reflector plate away from the side of exiting surface, the exiting surface of described light guide plate is provided with at least one of which blooming, described blooming is diffusion barrier or/and bright enhancement film, preferably, the blooming that the exiting surface of described light guide plate sets gradually is diffusion barrier, lower bright enhancement film and upper bright enhancement film, and described framework is provided with brake sack.
Embodiment described above only have expressed embodiment of the present utility model; it describes comparatively concrete and detailed; but therefore can not be interpreted as the restriction to this utility model the scope of the claims; in every case the technical scheme adopting the form of equivalent replacement or equivalent transformation to obtain, all should drop within protection domain of the present utility model.
Claims (10)
1. a LED circuit for backlight, including the power supply being sequentially connected with, drives IC and LED group, it is characterised in that described LED group is formed in parallel by least two LED.
2. the circuit board of a backlight, including substrate and the LED being arranged on substrate, it is characterized in that, described circuit board have employed the LED circuit described in claim 1, on substrate, respectively distribution has the negative electrode of equal number and the LED pad of anode, one LED connects the LED pad of adjacent a pair negative electrode and anode, and the LED parallel connection on substrate forms an a common-anode A and common cathode K.
3. the circuit board of backlight according to claim 2, the negative electrode of described LED and anode substrate the same face or not on coplanar in parallel.
4. the circuit board of backlight according to claim 2, it is characterised in that common cathode K that described LED is formed and the common-anode A the same face upward wiring at substrate or the not coplanar upward wiring at substrate.
5. the circuit board of backlight according to claim 2 is characterized in that, described circuit board is FPC or PCB.
6. a backlight, including framework and the light guide plate being arranged in framework, is provided with luminous source between described light guide plate and framework, described luminous source is connected to circuit board, it is characterised in that described circuit board is the either circuit plate described in claim 2-4.
7. backlight according to claim 6, it is characterised in that described light guide plate is provided with reflector plate away from the side of exiting surface.
8. backlight according to claim 6, it is characterised in that the exiting surface of described light guide plate is provided with at least one of which blooming.
9. backlight according to claim 8, it is characterised in that described blooming is diffusion barrier or/and bright enhancement film.
10. backlight according to claim 6, it is characterised in that be provided with brake sack on described framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620196424.4U CN205385640U (en) | 2016-03-15 | 2016-03-15 | LED circuit, circuit board that backlight was used and backlight thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620196424.4U CN205385640U (en) | 2016-03-15 | 2016-03-15 | LED circuit, circuit board that backlight was used and backlight thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205385640U true CN205385640U (en) | 2016-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620196424.4U Active CN205385640U (en) | 2016-03-15 | 2016-03-15 | LED circuit, circuit board that backlight was used and backlight thereof |
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| CN (1) | CN205385640U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023124889A1 (en) * | 2021-12-29 | 2023-07-06 | 杭州昀芯光电科技有限公司 | Bidirectional light-emitting power line pulse signal trigger light source, lamp string and control device |
-
2016
- 2016-03-15 CN CN201620196424.4U patent/CN205385640U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023124889A1 (en) * | 2021-12-29 | 2023-07-06 | 杭州昀芯光电科技有限公司 | Bidirectional light-emitting power line pulse signal trigger light source, lamp string and control device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |