CN205754601U - It is applicable to multi partition LOCAL DIMMING and drives the circuit of module - Google Patents
It is applicable to multi partition LOCAL DIMMING and drives the circuit of module Download PDFInfo
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- CN205754601U CN205754601U CN201620689022.8U CN201620689022U CN205754601U CN 205754601 U CN205754601 U CN 205754601U CN 201620689022 U CN201620689022 U CN 201620689022U CN 205754601 U CN205754601 U CN 205754601U
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Abstract
This utility model relates to liquid crystal tv technology.This utility model provides a kind of multi partition LOCAL DIMMING that is applicable to drive the circuit of module, and the VSYNC pin of DRIVER IC accesses the VSYNC pin of single-chip microcomputer by the first resistance；MOSI pin accesses the MOSI pin of single-chip microcomputer by the second resistance；MISO pin accesses the MISO pin of single-chip microcomputer by the 3rd resistance；CSB pin is connected with the 4th resistance one end and the 9th resistance one end respectively, and the 4th resistance other end is connected with the CSB pin of single-chip microcomputer, and the 9th resistance other end and the first DC level input connect；SCK pin is connected with the 5th resistance one end and the 8th resistance one end respectively, and the 5th resistance other end is connected with the SCK pin of single-chip microcomputer, and the 8th resistance other end and the first DC level input connect.It is applicable to multi partition LOCAL DIMMING.
Description
Technical field
This utility model relates to liquid crystal tv technology field, drives particularly to a kind of multi partition LOCAL DIMMING function
The circuit framework of dynamic model block.
Background technology
LOCAL DIMMING local backlight dynamic adjustment technique is one is applied to the technology that LCD TV backlight controls,
Its working mechanism is that FRC chip dynamically regulates the backlight illumination of corresponding region according to the bright dark degree of picture material, makes bright
Image brighter, dark image is darker, in conjunction with image compensation, thus reaches improve dynamic contrast and reduce the effect of power consumption.
In order to pursue more preferable dynamic contrast effect, requiring that the subregion of module group backlight is the smaller the better in theory, the least subregion is doomed to make
The increase of Composition Region quantity.But it is defeated that the DRIVER IC that can realize LOCAL DIMMING function at present at most can only realize 16th district
Going out, the driving that existing DRIVER IC how can be utilized to realize the back light system to the multi partition more than 16th district controls, and is mesh
The front technical issues that need to address.
Utility model content
Technical problem to be solved in the utility model, it is simply that provide one to be applicable to multi partition LOCAL DIMMING and drive
The circuit of dynamic model block is to realize utilizing the existing DRIVER IC that can realize LOCAL DIMMING function to drive more than 16th district
The backlight module of multi partition.
This utility model solves described technical problem, employed technical scheme comprise that, it is adaptable to multi partition LOCAL DIMMING
Drive module circuit, including backlight module, DRIVER IC, single-chip microcomputer, the first resistance, the second resistance, the 3rd resistance, the 4th
Resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance and the first DC level input；Described
DRIVER IC at least two；
The VSYNC functional pin of DRIVER IC accesses the VSYNC functional pin of single-chip microcomputer U0 by the first resistance；
The MOSI functional pin of DRIVER IC accesses the MOSI functional pin of single-chip microcomputer U0 by the second resistance；
The MISO functional pin of DRIVER IC accesses the MISO functional pin of single-chip microcomputer U0 by the 3rd resistance；
The CSB functional pin of DRIVER IC is connected with one end of the 4th resistance and one end of the 9th resistance respectively, the 4th electricity
The other end of resistance is connected with the CSB functional pin of single-chip microcomputer, and the other end of the 9th resistance and the first DC level input connect；
The SCK functional pin of DRIVER IC is connected with one end of the 5th resistance and one end of the 8th resistance respectively, the 5th electricity
The other end of resistance is connected with the SCK functional pin of single-chip microcomputer, and the other end of the 8th resistance and the first DC level input connect；
The FAULTB functional pin of DRIVER IC is connected with one end of the 6th resistance and one end of the 7th resistance respectively, the
The other end of six resistance is connected with the FAULTB functional pin of single-chip microcomputer, the other end of the 7th resistance and the input of the first DC level
End connects；
The outfan of DRIVER IC is connected with backlight module.
Concrete, it is characterised in that single-chip microcomputer is at least one.
Concrete, the number=backlight module number of partitions of the output area number * DRIVER IC of described DRIVER IC.
The beneficial effects of the utility model are: all DRIVER IC specific function pins are coupled by this utility model parallel,
During work, single-chip microcomputer, by the choosing order of CSB pin Transporting, selects DRIVER IC to be controlled, by VSYNC pin and
DRIVER IC keeps sync signal, then carries out set data communication by MOSI and MISO pin with DRIVER IC,
Accept, finally by FAULTB foot, the error information that DRIVER IC feeds back to, process and correct, complete a normal communication
Process；By that analogy, single-chip microcomputer can complete the Communication Control between multiple DRIVER IC, to realize LED all to terminal
Bar break-make and the change of brightness, final LCD screen realizes the effect plays of multi partition LOCAL DIMMING；This circuit increases
The circuit FAULTB that independently reports an error, this is not so that the abnormal DRIVER IC in parallel join affects other normal DRIVER
IC works, and just can the most directly judge abnormal IC according to abnormal phenomena simultaneously；Avoid multi partition and drive in module different
The subregion that DRIVER IC causes because of program difference is abnormal, also solves in the use of tradition tandem step by step, single DRIVER simultaneously
IC fault can directly contribute global fault, causes the series of problems such as inefficiency of fixing a breakdown.
Accompanying drawing explanation
Fig. 1 is the structure chart that this utility model is applicable to that multi partition LOCAL DIMMING drives the circuit embodiments of module；
Wherein, a DRIVER IC U1；2nd DRIVER IC U2；First resistance R1；Second resistance R2；3rd resistance
R3；4th resistance R4；5th resistance R5；6th resistance R6；7th resistance R7；8th resistance R8；9th resistance R9.
Below in conjunction with the detailed description of the invention of embodiment, foregoing of the present utility model is remake the most specifically
Bright.But this should not being interpreted as, the scope of the above-mentioned theme of this utility model is only limitted to Examples below.New without departing from this practicality
In the case of the above-mentioned technological thought of type, the various replacements made according to ordinary skill knowledge and customary means or change, all
Should be included in the range of this utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment describe in detail the technical solution of the utility model:
This utility model at most can only be real for the DRIVER IC that can realize LOCAL DIMMING function in prior art
Existing 16th district export, it is impossible to realize the back light system to the multi partition more than 16th district drives the problem controlled, it is provided that a kind of applicable
In multi partition LOCAL DIMMING drive module circuit, it is characterised in that include backlight module, DRIVER IC, single-chip microcomputer,
First resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th
Resistance and the first DC level input；Described DRIVER IC at least two；The VSYNC functional pin of DRIVER IC passes through
First resistance accesses the VSYNC functional pin of single-chip microcomputer U0；The MOSI functional pin of DRIVER IC accesses single by the second resistance
The MOSI functional pin of sheet machine U0；The MISO functional pin of DRIVER IC accesses the MISO merit of single-chip microcomputer U0 by the 3rd resistance
Can pin；The CSB functional pin of DRIVER IC is connected with one end of the 4th resistance and one end of the 9th resistance respectively, the 4th electricity
The other end of resistance is connected with the CSB functional pin of single-chip microcomputer, and the other end of the 9th resistance and the first DC level input connect；
The SCK functional pin of DRIVER IC is connected with one end of the 5th resistance and one end of the 8th resistance respectively, another of the 5th resistance
End is connected with the SCK functional pin of single-chip microcomputer, and the other end of the 8th resistance and the first DC level input connect；DRIVER
The FAULTB functional pin of IC is connected with one end of the 6th resistance and one end of the 7th resistance respectively, the other end of the 6th resistance with
The FAULTB functional pin of single-chip microcomputer connects, and the other end of the 7th resistance and the first DC level input connect；DRIVER IC
Outfan be connected with backlight module.All DRIVER IC specific function pins are coupled by this utility model parallel, during work,
Single-chip microcomputer, by the choosing order of CSB pin Transporting, selects DRIVER IC to be controlled, by VSYNC pin and DRIVER
IC keeps sync signal, then carries out set data communication by MOSI and MISO pin with DRIVER IC, finally by
FAULTB foot accepts the error information that DRIVER IC feeds back to, and processes and corrects, and completes a normal communication process；With
This analogizes, and single-chip microcomputer can complete the Communication Control between multiple DRIVER IC, to realize LED lamp bar break-makes all to terminal
With the change of brightness, final LCD screen realizes the effect plays of multi partition LOCAL DIMMING；This circuit adds independence
Report an error circuit FAULTB, and this is not so that the abnormal DRIVER IC in parallel join affects other normal DRIVER IC work
Make, just can the most directly judge abnormal IC simultaneously according to abnormal phenomena；Avoid multi partition and drive different DRIVER in module
The subregion that IC causes because of program difference is abnormal, also solves in the use of tradition tandem step by step, single DRIVER IC fault simultaneously
Global fault can be directly contributed, cause the series of problems such as inefficiency of fixing a breakdown.
Embodiment 1
This example meets different multi partition backlight needs with two panels DRIVER IC and a piece of single-chip microcomputer.
As it is shown in figure 1, wherein the VSYNC functional pin of a DRIVER IC U1 and the 2nd DRIVER IC U2
VSYNC functional pin is connected, and is accessed the VSYNC functional pin of single-chip microcomputer U0 by the first resistance R1；Oneth DRIVER IC U1
MOSI functional pin and the 2nd DRIVER IC U2 MOSI functional pin be connected, by second resistance R2 access single-chip microcomputer U0
MOSI functional pin；The MISO functional pin of the oneth DRIVER IC U1 and the MISO functional pin of the 2nd DRIVER IC U2
It is connected, is accessed the MISO functional pin of single-chip microcomputer U0 by the 3rd resistance R3；The CSB functional pin of the oneth DRIVER IC U1 with
The CSB functional pin of the 2nd DRIVER IC U2 is connected, and is accessed the CSB functional pin of single-chip microcomputer U0 by the 4th resistance R4, with
Time connect the first DC level V1 by the 9th resistance R9；The SCK functional pin of the oneth DRIVER IC U1 and the 2nd DRIVER
The SCK functional pin of IC U2 is connected, and is accessed the SCK functional pin of single-chip microcomputer U0 by the 5th resistance R5, simultaneously by the 8th electricity
Resistance R8 connects the first DC level V1；The FAULTB functional pin of the oneth DRIVER IC U1 and the 2nd DRIVER IC U2's
FAULTB functional pin is connected, and is accessed the FAULTB functional pin of single-chip microcomputer U0 by the 6th resistance R6, simultaneously by the 7th electricity
Resistance R7 connects the first DC level V1.The outfan of the oneth DRIVER IC U1 and the 2nd DRIVER IC U2 respectively with backlight mould
The different piecewise connections of group.Being coupled parallel by two groups of DRIVER IC specific function pins, during work, single-chip microcomputer passes through CSB pin
Transporting choosing order, selects DRIVER IC to be controlled, and keeps sync signal by VSYNC pin with DRIVER IC, so
Carry out set data communication by MOSI and MISO pin with DRIVER IC afterwards, accept finally by FAULTB foot
The error information that DRIVER IC feeds back to, processes and corrects, and completes a normal communication process；By that analogy, single-chip microcomputer
The Communication Control between multiple DRIVER IC can be completed, to realize the change of LED lamp bar break-makes all to terminal and brightness,
Final LCD screen realizes the effect plays of multi partition LOCAL DIMMING；This circuit adds the circuit that independently reports an error
FAULTB, this is not so that the abnormal DRIVER IC in parallel join affects other normal DRIVER IC work, root simultaneously
Abnormal IC just can be the most directly judged according to abnormal phenomena；Avoiding multi partition drives in module different DRIVER IC because of program
The subregion that difference causes is abnormal, also solves in the use of tradition tandem step by step simultaneously, and single DRIVER IC fault can directly be made
Become global fault, cause the series of problems such as inefficiency of fixing a breakdown.
By that analogy, designing requirement according to actual product, the DRIVER IC of connection can extend down to Un, to meet
Different multi partition backlights needs.
Embodiment 2
This example, with the DRIVER IC of a 16th district output, realizes the backlight module LOCAL DIMMING function of 80 subregions
As a example by, the brief description present invention:
(1) the DRIVER IC at least 5 of same model 16 district output, and the single-chip microcomputer of correspondence at least 1 are selected；
(2) the VSYNC functional pin of 5 DRIVER IC is linked together, be connected to single-chip microcomputer by current-limiting resistance
VSYNC pin；
(3) the MOSI functional pin of 5 DRIVER IC is linked together, be connected to single-chip microcomputer by current-limiting resistance
MOSI pin；
(4) the MISO functional pin of 5 DRIVER IC is linked together, be connected to single-chip microcomputer by current-limiting resistance
MISO pin；
(5) the CSB functional pin of 5 DRIVER IC is linked together, be connected to single-chip microcomputer CSB by current-limiting resistance
Pin, and keep high level by pull-up resistor by it；
(6) the SCK functional pin of 5 DRIVER IC is linked together, be connected to single-chip microcomputer SCK by current-limiting resistance
Pin, and keep high level by pull-up resistor by it；
(7) the FAULTB functional pin of 5 DRIVER IC is linked together, be connected to single-chip microcomputer by current-limiting resistance
FAULTB pin, and keep high level by pull-up resistor by it；
(8), during work, single-chip microcomputer, by the choosing order of CSB pin Transporting, selects DRIVER IC to be controlled, passes through
VSYNC pin and DRIVER IC keep sync signal, then carry out set by MOSI and MISO pin with DRIVER IC
Data communication, accept, finally by FAULTB foot, the error information that DRIVER IC feeds back to, process and correct, complete
Normal communication process.By that analogy, single-chip microcomputer can complete the Communication Control between 5 DRIVER IC, to realize end
Holding the change of all LED lamp bar break-makes and brightness, final LCD screen realizes the effect plays of multi partition LOCAL DIMMING.
Claims (3)
1. be applicable to multi partition LOCAL DIMMING drive module circuit, it is characterised in that include backlight module,
DRIVERIC, single-chip microcomputer, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th electricity
Resistance, the 8th resistance, the 9th resistance and the first DC level input；Described DRIVER IC at least two；
The VSYNC functional pin of DRIVER IC accesses the VSYNC functional pin of single-chip microcomputer by the first resistance；
The MOSI functional pin of DRIVER IC accesses the MOSI functional pin of single-chip microcomputer by the second resistance；
The MISO functional pin of DRIVER IC accesses the MISO functional pin of single-chip microcomputer by the 3rd resistance；
The CSB functional pin of DRIVER IC is connected with one end of the 4th resistance and one end of the 9th resistance respectively, the 4th resistance
The other end is connected with the CSB functional pin of single-chip microcomputer, and the other end of the 9th resistance and the first DC level input connect；
The SCK functional pin of DRIVER IC is connected with one end of the 5th resistance and one end of the 8th resistance respectively, the 5th resistance
The other end is connected with the SCK functional pin of single-chip microcomputer, and the other end of the 8th resistance and the first DC level input connect；
The FAULTB functional pin of DRIVER IC is connected with one end of the 6th resistance and one end of the 7th resistance respectively, the 6th electricity
The other end of resistance is connected with the FAULTB functional pin of single-chip microcomputer, and the other end of the 7th resistance and the first DC level input are even
Connect；
The outfan of DRIVER IC is connected with backlight module.
The multi partition LOCAL DIMMING that is applicable to the most according to claim 1 drives the circuit of module, it is characterised in that
Single-chip microcomputer is at least one.
The multi partition LOCAL DIMMING that is applicable to the most according to claim 1 drives the circuit of module, it is characterised in that
Number=backlight module the number of partitions of the output area number * DRIVER IC of described DRIVER IC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620689022.8U CN205754601U (en) | 2016-07-01 | 2016-07-01 | It is applicable to multi partition LOCAL DIMMING and drives the circuit of module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620689022.8U CN205754601U (en) | 2016-07-01 | 2016-07-01 | It is applicable to multi partition LOCAL DIMMING and drives the circuit of module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205754601U true CN205754601U (en) | 2016-11-30 |
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ID=57380016
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620689022.8U Active CN205754601U (en) | 2016-07-01 | 2016-07-01 | It is applicable to multi partition LOCAL DIMMING and drives the circuit of module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112908232A (en) * | 2021-03-26 | 2021-06-04 | 四川长虹电器股份有限公司 | LED multi-partition backlight fault detection system and fault judgment method |
-
2016
- 2016-07-01 CN CN201620689022.8U patent/CN205754601U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112908232A (en) * | 2021-03-26 | 2021-06-04 | 四川长虹电器股份有限公司 | LED multi-partition backlight fault detection system and fault judgment method |
| CN112908232B (en) * | 2021-03-26 | 2022-10-18 | 四川长虹电器股份有限公司 | LED multi-partition backlight fault detection system and fault judgment method |
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| GR01 | Patent grant |