CN202168244U - Multi-channel LED driver chip output current control device - Google Patents
Multi-channel LED driver chip output current control device Download PDFInfo
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- CN202168244U CN202168244U CN2011201856162U CN201120185616U CN202168244U CN 202168244 U CN202168244 U CN 202168244U CN 2011201856162 U CN2011201856162 U CN 2011201856162U CN 201120185616 U CN201120185616 U CN 201120185616U CN 202168244 U CN202168244 U CN 202168244U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
本实用新型公开了一种多通道LED驱动芯片输出电流控制装置；包括：多路输出通道；和电流数据解码装置；每一路输出通道上分别连接有电流设置数模转换装置，所述多个数模转换装置由电流数据解码装置控制。本实用新型可以独立调节多通道LED驱动芯片各个通道的最大电流。实现输出通道电流可编程调节，在LED大屏幕显示中可以实现可编程白平衡调节和LED大屏幕显示的逐点校正功能。
The utility model discloses a multi-channel LED drive chip output current control device; comprising: multiple output channels; and a current data decoding device; The analog conversion means is controlled by the current data decoding means. The utility model can independently adjust the maximum current of each channel of the multi-channel LED driving chip. Realize the programmable adjustment of the output channel current, and realize the programmable white balance adjustment and the point-by-point correction function of the LED large-screen display in the LED large-screen display.
Description
Technical field
The utility model relates to a kind of setting and adjusting device of multi-channel LED chip for driving output current.
Background technology
Along with light-emitting diode (LED) is more and more used widely, remove white light emitting diode LED and be used to illumination, field such as backlight widely, also will be approved by people by the white light that RGB light RGB mixes in the requirements at the higher level field.With regard to RGB light RGB itself, be applied to decoration and realize that as pixel large scale display also more and more is widely used by it.
At present, no matter be used for showing or decorating that LED all inevitably needs special-purpose drive circuit.As shown in Figure 1, existing a kind of mode is that the passage output current of multi-channel LED chip for driving is that each passage respectively has an external resistance setting.Perhaps as shown in Figure 2, the shared unified setting of a resistance of the multichannel of multi-channel LED chip for driving (each output channel circuit is identical), each passage maximum current can not independent regulation.
The utility model content
The utility model technical problem to be solved provides a kind of multi-channel LED chip for driving output current control device, the maximum current that it can each passage of independent regulation multi-channel LED chip for driving.
In order to solve above technical problem, the utility model provides a kind of multi-channel LED chip for driving output current control device; Comprise: the multichannel output channel; With the current data decoding device; Be connected with electric current respectively on each road output channel digiverter is set, said a plurality of digiverters are controlled by the current data decoding device.
The beneficial effect of the utility model is: maximum current that can each passage of independent regulation multi-channel LED chip for driving.Realize the adjusting of output channel current programmable, in the LED large scale display, can realize the pointwise correction function of white balance adjusting able to programme and LED large scale display.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further explain.
Fig. 1 is the sketch map that each passage of passage output current of existing multi-channel LED chip for driving respectively has an external resistance to be provided with;
Fig. 2 is the unified sketch map that is provided with of the shared resistance of the multichannel of existing multi-channel LED chip for driving;
Fig. 3 is the said schematic representation of apparatus of the utility model embodiment.
Embodiment
As shown in Figure 3, the said multi-channel LED chip for driving of the utility model output current control device; Comprise: the multichannel output channel; With the current data decoding device; Be connected with electric current respectively on each road output channel digiverter is set, said a plurality of digiverters are controlled by the current data decoding device.Under the control of current data decoding device, can programme and regulate the maximum output current of setting each output channel.
And after each passage has all increased maximum current digiverter DAC is set,
The adjusting of output channel current programmable can be realized, in the LED large scale display, white balance adjusting able to programme can be realized.In the LED large scale display, regulate the maximum drive current of red, green and blue LED lamp, thereby realize the adjusting of the luminous ratio realization demonstration white balance of adjusting RGB light through the outer meeting resistance of adjusting LED chip for driving.
Can realize the pointwise correction function of LED large scale display through the independent regulation of each being counted the output channel maximum current.Because there is certain difference in the LED diode, even drive current one is to guaranteeing that also its luminosity is consistent, so can be through the maximum output current adjustment of each output channel being come the luminous difference of compensation LED diode.
The utility model is not limited to the execution mode that preceding text are discussed.More than the description of embodiment is intended in order to describe and explain the technical scheme that the utility model relates to.Conspicuous conversion or the alternative protection range that also should be considered to fall into the utility model based on the utility model enlightenment.Above embodiment is used for disclosing the best implementation method of the utility model, so that those of ordinary skill in the art can use numerous embodiments of the utility model and the purpose that multiple alternative reaches the utility model.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201856162U CN202168244U (en) | 2011-06-03 | 2011-06-03 | Multi-channel LED driver chip output current control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201856162U CN202168244U (en) | 2011-06-03 | 2011-06-03 | Multi-channel LED driver chip output current control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202168244U true CN202168244U (en) | 2012-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201856162U Expired - Lifetime CN202168244U (en) | 2011-06-03 | 2011-06-03 | Multi-channel LED driver chip output current control device |
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| Country | Link |
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| CN (1) | CN202168244U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI450639B (en) * | 2012-03-21 | 2014-08-21 | Vastview Tech Inc | Methods and apparatus for driving led-based lighting units |
| CN105813266A (en) * | 2016-04-28 | 2016-07-27 | 厦门大学 | Ethernet communication-based multi-path LED lamp current control system |
| CN116580669A (en) * | 2023-05-24 | 2023-08-11 | 成都利普芯微电子有限公司 | A display module and LED display |
-
2011
- 2011-06-03 CN CN2011201856162U patent/CN202168244U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI450639B (en) * | 2012-03-21 | 2014-08-21 | Vastview Tech Inc | Methods and apparatus for driving led-based lighting units |
| CN105813266A (en) * | 2016-04-28 | 2016-07-27 | 厦门大学 | Ethernet communication-based multi-path LED lamp current control system |
| CN105813266B (en) * | 2016-04-28 | 2018-05-08 | 厦门大学 | Multi-way LED lamp current control system based on ethernet communication |
| CN116580669A (en) * | 2023-05-24 | 2023-08-11 | 成都利普芯微电子有限公司 | A display module and LED display |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120314 |
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| CX01 | Expiry of patent term |