CN202008811U - LED white balance adjuster - Google Patents

LED white balance adjuster Download PDF

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Publication number
CN202008811U
CN202008811U CN2010206906375U CN201020690637U CN202008811U CN 202008811 U CN202008811 U CN 202008811U CN 2010206906375 U CN2010206906375 U CN 2010206906375U CN 201020690637 U CN201020690637 U CN 201020690637U CN 202008811 U CN202008811 U CN 202008811U
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CN
China
Prior art keywords
circuit
resistance
drive circuit
white balance
input end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010206906375U
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Chinese (zh)
Inventor
吴星华
王科涛
姜文斌
汪萍
葛燕
包大凤
朱迁虎
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CHANGZHOU ELECTRONICS INST Co Ltd
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CHANGZHOU ELECTRONICS INST Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHANGZHOU ELECTRONICS INST Co Ltd filed Critical CHANGZHOU ELECTRONICS INST Co Ltd
Priority to CN2010206906375U priority Critical patent/CN202008811U/en
Application granted granted Critical
Publication of CN202008811U publication Critical patent/CN202008811U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to an LED white balance adjuster, which comprises a signal generating circuit and a signal driving circuit. An output end of the signal generating circuit is electrically connected with an input end of the signal driving circuit. The LED white balance adjuster is characterized in that the LED white balance adjuster further comprises a relay driving circuit and a resistance adjusting circuit, an output end of the signal driving circuit is electrically connected with an input end of the relay driving circuit, and an output end of the relay driving circuit is electrically connected with an input end of the resistance adjusting circuit. The LED white balance adjuster has the advantages that white balance of an LED display screen is adjusted conveniently, the LED white balance adjuster not only is high in precision, but also saves time and labor, and the like.

Description

LED white balance adjuster
Technical field
The utility model relates to a kind of adjuster, is specifically related to a kind of LED white balance adjuster.
Background technology
In LED display manufacturing process, the brightness and the colour temperature of LED display reach gratifying degree for convenience, usually need to adjust respectively the fluorescent tube drive current of red, green, blue three-primary colours, make three-primary colours form a suitable ratio, show pure white effect thereby reach.
Adjust in the circuit at traditional display screen, regulate the driving chip electric current and be to use adjustable potentiometer, the resistance that needs the manual setting potentiometer that do not stop in the adjustment process, make adjustment time and speed elongated greatly and slack-off, not only degree of accuracy poor, waste time and energy, and the phenomenon of colour cast can appear when showing in adjusted LED display.
Summary of the invention
The purpose of this utility model provides a kind of LED display white balance of being convenient to regulate, not only degree of accuracy height, and time saving and energy saving LED white balance adjuster.
In order to achieve the above object, the technical solution of the utility model is: a kind of LED white balance adjuster, comprise signal generating circuit and signal drive circuit, the output terminal of described signal generating circuit is electrically connected with the input end of signal drive circuit, its innovative point is: also comprise relay drive circuit and resistance adjustment circuit, the output terminal of described signal drive circuit is electrically connected with the input end of relay drive circuit, and the output terminal of relay drive circuit is electrically connected with the resistance adjustment circuit input end.
In above-mentioned technical scheme, described resistance adjustment circuit comprises resistance coarse adjustment circuit and resistance thin tuning circuit, and the input end of the input end of described resistance coarse adjustment circuit and resistance thin tuning circuit is electrically connected with the corresponding output terminal of relay drive circuit respectively.
In above-mentioned technical scheme, described resistance coarse adjustment circuit constitutes one group by 1 relay and 1 resistance series connection, and have 16 groups of parallel connections, the input end of 1 relay is electrically connected with the output terminal of relay drive circuit, resistance thin tuning circuit constitutes one group by 2 relays and 1 resistance series connection, and have 16 groups of parallel connections, the input end of 2 relays is electrically connected with the corresponding output terminal of relay drive circuit respectively.
In above-mentioned technical scheme, have 3 relay chip for driving in the described relay drive circuit, and model is MBI5024.
In above-mentioned technical scheme, have CPU in the described signal generating circuit, and the CPU model is AT89C52.
In above-mentioned technical scheme, have the signal chip for driving in the described signal drive circuit, and the signal chip for driving is 74HC245.
Technique effect of the present utility model is: because the utility model also comprises relay drive circuit and resistance adjustment circuit, the output terminal of described signal drive circuit is electrically connected with the input end of relay drive circuit, the output terminal of relay drive circuit is electrically connected with the resistance adjustment circuit input end, during use, the resistance adjustment circuit output terminal be electrically connected with the input end of LED display driver circuit, the output terminal of LED display driver circuit is electrically connected with LED display, needs according to resistance in the white balance circuit of LED display, the resistance output valve that signal generating circuit sets in advance outputs control signals to the input end of signal drive circuit, signal drive circuit output trigger pip is to the input end of relay drive circuit, the duty of relay drive circuit controlling resistance regulating circuit, the white balance that makes the utility model need not the manual adjustments LED display shows, degree of accuracy height not only, time saving and energy saving, and the phenomenon of colour cast can not appear when showing in adjusted LED display.
Description of drawings
Fig. 1 is the functional-block diagram of a kind of embodiment of the utility model;
Fig. 2 is the schematic diagram of a kind of embodiment of the utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described in detail, but is not limited to this.
As shown in Figure 1, 2, a kind of LED white balance adjuster, comprise signal generating circuit 1 and signal drive circuit 2, the output terminal of described signal generating circuit 1 is electrically connected with the input end of signal drive circuit 2, also comprise relay drive circuit 3 and resistance adjustment circuit 4, the output terminal of described signal drive circuit 2 is electrically connected with the input end of relay drive circuit 3, and the output terminal of relay drive circuit 3 is electrically connected with resistance adjustment circuit 4 input ends.
As shown in Figure 2, described resistance adjustment circuit 4 comprises resistance coarse adjustment circuit 4-1 and resistance thin tuning circuit 4-2, and the input end of the input end of described resistance coarse adjustment circuit 4-1 and resistance thin tuning circuit 4-2 is electrically connected with relay drive circuit 3 corresponding output terminals respectively.
As shown in Figure 2, described resistance coarse adjustment circuit 4-1 constitutes one group by 1 relay and 1 resistance series connection, and have 16 groups of parallel connections, the input end of 1 relay is electrically connected with the output terminal of relay drive circuit 3, resistance thin tuning circuit 4-2 constitutes one group by 2 relays and 1 resistance series connection, and have 16 groups of parallel connections, the input end of 2 relays is electrically connected with relay drive circuit 3 corresponding output terminals respectively.
As shown in Figure 2, have 3 relay chip for driving in the described relay drive circuit 3, and model is MBI5024; Have CPU in the described signal generating circuit 1, and the CPU model is AT89C52; Have the signal chip for driving in the described signal drive circuit 2, and the signal chip for driving is 74HC245.
The utility model principle of work: during use, the output terminal of resistance adjustment circuit 4 is electrically connected with the input end of LED display driver circuit, the output terminal of LED display driver circuit is electrically connected with LED display, according to the needed resistance of resistance in the white balance circuit of LED display, the resistance output valve output control signal that signal generating circuit 1 sets in advance is delivered to the input end of signal drive circuit 2, and this signal output is delivered to the input end of relay drive circuit 3, the corresponding relays closing of contact on the controlling resistance regulating circuit 4, after relay drive circuit 3 receives steering order, each actuating of relay in the driving resistor regulating circuit 4, thus reach the required resistance value of output.Characteristics and display screen fluorescent tube driving current value commonly used according to the LED display constant-current driven chip; the resistance of regulating the used resistance of LED display constant-current driven chip usually can be between 0~256 ohm; and usually need 1~2 ohm of single step stepping; according to these characteristics; the resistance adjustment circuit adopts the mode of coarse adjustment and fine tuning combination; and each resistance all need be with 16 ohm; resistance coarse adjustment circuit 4-1 is that 256 ohm resistance is divided into 16 grades with resistance; 16 ohm every grade; remaining resistance adopts the method for fine tuning; resistance fine tuning connection circuit 4-2 is divided into 16 grades with 16 ohm, every grade about 1 ohm.Resistance error of the present utility model is mainly derived from the error of relay contact contact resistance and each resistance, the contact contact resistance of relay is lower than 50m Ω, error after all arrays are compound within the range of permission, the error of each resistance can be avoided by accurate selection resistance, make degree of accuracy height of the present utility model, make that the white balance display effect of LED display is better, avoid occurring the colour cast phenomenon.

Claims (6)

1. LED white balance adjuster, comprise signal generating circuit (1) and signal drive circuit (2), the output terminal of described signal generating circuit (1) is electrically connected with the input end of signal drive circuit (2), it is characterized in that: also comprise relay drive circuit (3) and resistance adjustment circuit (4), the output terminal of described signal drive circuit (2) is electrically connected with the input end of relay drive circuit (3), and the output terminal of relay drive circuit (3) is electrically connected with resistance adjustment circuit (4) input end.
2. LED white balance adjuster according to claim 1, it is characterized in that: described resistance adjustment circuit (4) comprises resistance coarse adjustment circuit (4-1) and resistance thin tuning circuit (4-2), and the input end of the input end of described resistance coarse adjustment circuit (4-1) and resistance thin tuning circuit (4-2) is electrically connected with the corresponding output terminal of relay drive circuit (3) respectively.
3. LED white balance adjuster according to claim 2, it is characterized in that: described resistance coarse adjustment circuit (4-1) constitutes one group by 1 relay and 1 resistance series connection, and have 16 groups of parallel connections, the input end of 1 relay is electrically connected with the output terminal of relay drive circuit (3), resistance thin tuning circuit (4-2) constitutes one group by 2 relays and 1 resistance series connection, and have 16 groups of parallel connections, the input end of 2 relays is electrically connected with the corresponding output terminal of relay drive circuit (3) respectively.
4. LED white balance adjuster according to claim 1 is characterized in that: have 3 relay chip for driving in the described relay drive circuit (3), and model is MBI5024.
5. LED white balance adjuster according to claim 1 is characterized in that: described signal generating circuit has CPU in (1), and the CPU model is AT89C52.
6. LED white balance adjuster according to claim 1 is characterized in that: described signal drive circuit has the signal chip for driving in (2), and the signal chip for driving is 74HC245.
CN2010206906375U 2010-12-30 2010-12-30 LED white balance adjuster Expired - Fee Related CN202008811U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206906375U CN202008811U (en) 2010-12-30 2010-12-30 LED white balance adjuster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010206906375U CN202008811U (en) 2010-12-30 2010-12-30 LED white balance adjuster

Publications (1)

Publication Number Publication Date
CN202008811U true CN202008811U (en) 2011-10-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010206906375U Expired - Fee Related CN202008811U (en) 2010-12-30 2010-12-30 LED white balance adjuster

Country Status (1)

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CN (1) CN202008811U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104252820A (en) * 2014-09-11 2014-12-31 苏州合欣美电子科技有限公司 S-shaped LED (light emitting diode) display screen and connector thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104252820A (en) * 2014-09-11 2014-12-31 苏州合欣美电子科技有限公司 S-shaped LED (light emitting diode) display screen and connector thereof

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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: 20111012

Termination date: 20141230

EXPY Termination of patent right or utility model