CN204558000U - A kind of liquid crystal display backlight self-adjusting circuit - Google Patents
A kind of liquid crystal display backlight self-adjusting circuit Download PDFInfo
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- CN204558000U CN204558000U CN201520222581.3U CN201520222581U CN204558000U CN 204558000 U CN204558000 U CN 204558000U CN 201520222581 U CN201520222581 U CN 201520222581U CN 204558000 U CN204558000 U CN 204558000U
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Abstract
The utility model discloses a kind of liquid crystal display backlight self-adjusting circuit, solve prior art medium advertisement machine liquid crystal display backlight and regulate and can not regulate brightness along with the change of light intensity, cause the problem of energy dissipation.Should comprise based on advertisement machine liquid crystal display backlight self-adjusting circuit: single-chip minimum system, according to the data message received, the brightness of adjustable liquid crystal display screen backlight exports; Adopt the LED LCD backlight driving circuit of DF6113 chip, output interface is connected to liquid crystal display backlight interface; Adopt the D/A converting circuit of PCF8591 chip, export and be connected with LED LCD backlight driving circuit, input is connected with single-chip minimum system; BH1750 light sensation chip, is connected with single-chip minimum system, and perception environment illumination intensity also feeds back to single-chip minimum system.Power circuit is single-chip minimum system, D/A converting circuit and BH1750 light sensation chip power supply.The utility model not only structure is simple, with low cost, and realizes conveniently.
Description
Technical field
The utility model relates to a kind of regulating circuit, specifically, relates to a kind of liquid crystal display backlight self-adjusting circuit.
Background technology
The liquid crystal display of conventional ads machine adopts LCD TV lcd screen, backlight is unadjustable or initiatively can only go to regulate brightness by key mode, indoor and outdoor illumination brightness is different, and advertisement machine display is all same brightness display and can not regulates brightness along with the change of light intensity, causes energy dissipation.
Utility model content
The purpose of this utility model is to overcome above-mentioned defect, provide a kind of structure simple, realize easily based on advertisement machine liquid crystal display backlight self-adjusting circuit.
To achieve these goals, the technical solution adopted in the utility model is as follows:
Single-chip minimum system, according to the data message received, sends regulable control order, and control PCF8591 chip exports adjustable voltage;
Adopt the LED LCD backlight driving circuit of DF6113 chip, output interface is connected to liquid crystal display backlight interface;
Adopt the D/A converting circuit of PCF8591 chip, export and be connected with LED LCD backlight driving circuit, input is connected with single-chip minimum system, transmits adjustable voltage to LED LCD backlight driving circuit after receiving the regulable control order conversion of single-chip minimum system;
BH1750 light sensation chip, is connected with single-chip minimum system, to the intensity of illumination change digital output collected, and feeds back to single-chip minimum system;
Power circuit is single-chip minimum system, D/A converting circuit and BH1750 light sensation chip power supply.
Specifically, described BH1750 sensitive chip is connected by the 40th pin of IIC interface and single-chip minimum system, the 41st pin.
Specifically, the 18th pin of described D/A converting circuit and single-chip minimum system, the 19th pin are connected.
Specifically, in described D/A converting circuit, the 15th pin of PCF8591 chip is connected with the 5th pin of the DF6113 chip of LED LCD backlight driving circuit.
Compared with prior art, the utility model has following beneficial effect:
(1) the utility model adopts the regulating circuit that the formations one such as single-chip minimum system, light sensation chip, D/A converting circuit are new, the liquid crystal display backlight drive circuit of original advertisement machine is replaced with regulating circuit, its backlight illumination can be changed along with the change of light intensity, when light is brighter, backlight is brighter, time more weak, backlight is more weak, so more can meet the comfortable visual effect of human eye and more energy-conservation.
(2) not only structure is simple, with low cost for the utility model, and realizes conveniently, applying on a large scale established solid foundation for it.
Accompanying drawing explanation
fig. 1 is system chart of the present utility model.
Fig. 2 is the circuit theory diagrams of single-chip minimum system in the utility model.
Fig. 3 is the circuit theory diagrams of D/A converting circuit in the utility model.
Fig. 4 is the circuit theory diagrams of power circuit in the utility model.
Fig. 5 is the circuit theory diagrams of BH1750 light sensation chip in the utility model.
Fig. 6 is LED LCD backlight driving circuit in the utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, and embodiment of the present utility model includes but not limited to the following example.
Embodiment
As shown in Figure 1, present embodiments provide a kind of liquid crystal display backlight self-adjusting circuit, comprise: single-chip minimum system, LED LCD backlight driving circuit, D/A converting circuit, light sensation chip and power circuit, the present embodiment adopts said structure to form a kind of novel regulating circuit, for substituting the liquid crystal display backlight drive circuit of existing advertisement machine, in actual applications, by light sensation chip, row induction is shone into surrounding environment light, and the data of feedback correspondence are novel to single-chip minimum system, when ambient lighting is brighter time, then light sensation chip feedback backlight regulates the information increased to single-chip minimum system, then, LED LCD backlight driving circuit is passed to after this control information being changed by D/A converting circuit by single-chip minimum system, finally realize the adjustment to backlight illumination by LED LCD backlight driving circuit, otherwise, if when ambient lighting is got over time, if then light sensation chip feedback backlight regulates the information subtracted to single-chip minimum system, then, be passed to LED LCD backlight driving circuit after this control information being changed by D/A converting circuit by single-chip minimum system, finally realize the adjustment to backlight illumination by LED LCD backlight driving circuit.By above-mentioned setting, backlight illumination can be changed along with the change of light intensity, and when light is brighter, backlight is brighter, and time more weak, backlight is more weak, so more can meet the comfortable visual effect of human eye and more energy-conservation.
Specifically, single-chip minimum system, the steering order of the processing data information and correspondence that are mainly used in light sensation chip sends, and its circuit structure is as shown in Figure 2;
As shown in Figure 6, LED LCD backlight driving circuit, input interface is connected with D/A converting circuit, output interface is connected to liquid crystal display backlight interface, for receiving the control signal of D/A converting circuit conversion, then control to export, in the present embodiment according to the control signal received, LED LCD backlight driving circuit adopts DF6113 chip, and is connected with the 18th pin of single-chip minimum system, the 19th pin.
As shown in Figure 3, D/A converting circuit, in the present embodiment, D/A converting circuit adopts PCF8591 chip, its output is connected with LED LCD backlight driving circuit, input is connected with single-chip minimum system, specifically, the 18th pin, the 19th pin of D/A converting circuit and single-chip minimum system are connected, and D/A converting circuit is used for the control signal of single-chip minimum system to be converted to the receivable adjustable voltage signal of LED LCD backlight driving circuit; In D/A converting circuit, the 15th pin of PCF8591 chip is connected with the 5th pin of the DF6113 chip of LED LCD backlight driving circuit.
As shown in Figure 5, BH1750 light sensation chip, is connected with single-chip minimum system, and it is for perception ambient lighting, and specifically, intensity BH1750 sensitive chip is connected by the 40th pin of IIC interface and single-chip minimum system, the 41st pin (I/O port).
As shown in Figure 4, power circuit is single-chip minimum system, and D/A converting circuit and BH1750 sensitive chip are powered.Power circuit is comparatively common circuit, and therefore not to repeat here.
According to above-described embodiment, just the utility model can be realized well.What deserves to be explained is; under prerequisite based on above-mentioned design concept; for solving same technical matters; even if some making on architecture basics disclosed in the utility model are without substantial change or polishing; the essence of the technical scheme adopted is still the same with the utility model, therefore it also should in protection domain of the present utility model.
Claims (4)
1. a liquid crystal display backlight self-adjusting circuit, is characterized in that, comprising:
Single-chip minimum system, according to the data message received, sends regulable control order, and control PCF8591 chip exports adjustable voltage;
Adopt the LED LCD backlight driving circuit of DF6113 chip, output interface is connected to liquid crystal display backlight interface;
Adopt the D/A converting circuit of PCF8591 chip, export and be connected with LED LCD backlight driving circuit, input is connected with single-chip minimum system, transmits adjustable voltage to LED LCD backlight driving circuit after receiving the regulable control order conversion of single-chip minimum system;
BH1750 light sensation chip, is connected with single-chip minimum system, to the intensity of illumination change digital output collected, and feeds back to single-chip minimum system;
Power circuit is single-chip minimum system, D/A converting circuit and BH1750 light sensation chip power supply.
2. a kind of liquid crystal display backlight self-adjusting circuit according to claim 1, is characterized in that, described BH1750 sensitive chip is connected by the 40th pin of IIC interface and single-chip minimum system, the 41st pin.
3. a kind of liquid crystal display backlight self-adjusting circuit according to claim 1, is characterized in that, the 18th pin, the 19th pin of described D/A converting circuit and single-chip minimum system are connected.
4. a kind of liquid crystal display backlight self-adjusting circuit according to claim 1, is characterized in that, in described D/A converting circuit, the 15th pin of PCF8591 chip is connected with the 5th pin of the DF6113 chip of LED LCD backlight driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520222581.3U CN204558000U (en) | 2015-04-14 | 2015-04-14 | A kind of liquid crystal display backlight self-adjusting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520222581.3U CN204558000U (en) | 2015-04-14 | 2015-04-14 | A kind of liquid crystal display backlight self-adjusting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204558000U true CN204558000U (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520222581.3U Expired - Fee Related CN204558000U (en) | 2015-04-14 | 2015-04-14 | A kind of liquid crystal display backlight self-adjusting circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107172517A (en) * | 2017-05-25 | 2017-09-15 | 歌尔股份有限公司 | The bluetooth earphone of automatic adjusument warning light brightness |
-
2015
- 2015-04-14 CN CN201520222581.3U patent/CN204558000U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107172517A (en) * | 2017-05-25 | 2017-09-15 | 歌尔股份有限公司 | The bluetooth earphone of automatic adjusument warning light brightness |
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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: 20150812 Termination date: 20180414 |
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| CF01 | Termination of patent right due to non-payment of annual fee |