CN200965775Y - Voltage rising waveform controllable circuit and LCD TV - Google Patents
Voltage rising waveform controllable circuit and LCD TV Download PDFInfo
- Publication number
- CN200965775Y CN200965775Y CN 200620011353 CN200620011353U CN200965775Y CN 200965775 Y CN200965775 Y CN 200965775Y CN 200620011353 CN200620011353 CN 200620011353 CN 200620011353 U CN200620011353 U CN 200620011353U CN 200965775 Y CN200965775 Y CN 200965775Y
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- circuit
- divider resistance
- liquid crystal
- rising waveform
- supply
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Abstract
The utility model discloses a voltage rising waveform controllable electrical circuit and a Liquid Crystal Display, which comprises a switch circuit with an adjustable breakover degree, the control end of the switch circuit on the one hand is connected with a dc power supply through a first divider resistor, and on the other hand the switch circuit is connected with the earth through a second divider resistor; a charging capacitance is paralleled on the both ends of the first divider resistor, the gating end of the switch circuit is connected with the dc power supply while the other end of the switch circuit is connected with the output end of the power supply voltage. The utility model is connected with the voltage rise waveform control circuit between the supply end and the input end of the dc power supply of the TCON board of the Liquid Crystal Display so that the simple circuit structure can make the output voltage change the power waveform in larger scope to meet different demands of Liquid Crystal Display on the TCON board supply voltage rising waveform. The adoption of the voltage rise waveform control circuit can simplify the circuit design effectively so as to reduce the designing cost significantly, as well as shorten the developing cycle and improve producing efficiency.
Description
Technical field
The utility model relates to a kind of voltage waveform control circuit, specifically, relates to a kind of rising waveform that can control voltage, to satisfy the control circuit of TCON plate supply voltage requirement in the different liquid crystal display circuit.
Background technology
Flourish along with the liquid crystal display industry, display device has stepped into the liquid crystal epoch.No matter being large-sized display, notebook computer or LCD TV, still is undersized high-resolution colour screen handset, PDA, GPS etc., and liquid crystal panel is being nibbled the produce market of other classifications, and then realizes unified situation.In liquid crystal display circuit, particularly in the display circuit of liquid crystal TV set, all include a TCON plate, be clock controller (Timing Controller, TCON), clock signal is sent to respectively drives integrated chip in the display circuit, realize each integrated chip co-ordination.TCON plate voltage request is generally 5V or 12V, for different liquid crystal display circuit, to rise time of this voltage be that rising waveform has clear and definite separately requirement.Therefore, need the different control circuit of design to satisfy the rising waveform requirement of different TCON plate voltages, cause liquid crystal TV set circuit design cost to raise, construction cycle lengthening, production efficiency descend.
Summary of the invention
The utility model designs the problem of different control circuits in order to solve in the prior art for the rising waveform that satisfies different TCON plate voltages requires needs, a kind of novel voltage rising waveform controlable electric current is provided, change in can being implemented in a big way and go up electrical waveform, satisfy of the requirement of different liquid crystal displays TCON plate voltage rising waveform.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of voltage rising waveform controlable electric current and liquid crystal TV set comprise the adjustable on-off circuit of a conducting degree, and the control end of described on-off circuit connects a direct current power supply through first divider resistance on the one hand, on the other hand through the second divider resistance ground connection; Be parallel with a charging capacitor at the two ends of described first divider resistance, gating end one end of described on-off circuit connects described direct supply, and the other end connects the supply voltage output terminal.
In order to simplify circuit structure, reduce cost, described on-off circuit adopts a P channel MOS tube to realize that the grid of described metal-oxide-semiconductor is the control end of described on-off circuit, source electrode and drain electrode are the gating end of described on-off circuit, are connected between described direct supply and the supply voltage output terminal.Impact for fear of the supply voltage of external interference, be connected with the filter capacitor of a ground connection at described supply voltage output terminal output.
In order to realize the switch control of liquid crystal TV set main control computer central layer to liquid crystal screen, described second divider resistance is by a controllable switch element ground connection.In the utility model, described controllable switch element adopts a NPN type triode to realize, the base stage connection control signal input end of described triode receives the start control signal of sending from televisor main control computer central layer, collector connects described second divider resistance, grounded emitter.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is by being connected described voltage rising waveform control circuit between the feeder ear of the TCON of liquid crystal display plate and the dc supply input, make output voltage can in a big way, change electrical waveform on it with simple circuit configuration, thereby satisfied of the requirement of different liquid crystal displays TCON plate supply voltage rising waveform.Adopt described voltage rising waveform controlable electric current effectively to simplify circuit design, design cost is obviously reduced, construction cycle shortening, production efficiency improve.
Description of drawings
Fig. 1 is the schematic diagram of voltage rising waveform controlable electric current in the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
The utility model is in order to make the rising waveform that outputs to the supply voltage on the TCON plate adjustable, designed the adjustable on-off circuit of a conducting degree between the feeder ear of the TCON of liquid crystal display plate and dc supply input.In the utility model, in order to simplify circuit structure, reduce cost, described on-off circuit adopts a P channel MOS tube Q1 to realize, as shown in Figure 1.
Among Fig. 1, the grid of described P channel MOS tube Q1 connects on the one hand the input end Vin of direct supply through divider resistance R1, described dc supply input Vin according to the specific requirement connection+5V of TCON plate or+the 12V direct supply; On the other hand through divider resistance R2 ground connection.Be parallel with a charging capacitor C1 at the two ends of described divider resistance R1, the source electrode of metal-oxide-semiconductor Q1 connects described dc supply input Vin, and drain electrode connects supply voltage output end vo ut.For fear of external interference the supply voltage that outputs to the TCON plate is impacted, be connected with the filter capacitor C2 of a ground connection at described supply voltage output end vo ut.
In order to realize of the switch control of LCD TV main control computer central layer to liquid crystal screen, between described divider resistance R2 and ground, be connected with a controllable switch element, after receiving the start control signal that the main control computer central layer sends, control described on-off element conducting, make divider resistance R2 ground connection, P channel MOS tube Q1 conducting work.In the utility model, described controllable switch element adopts a NPN type triode Q2 to realize, the base stage of described triode Q2 is through the resistance R 3 connection control signal input ends of series connection, it is the GPIO mouth of CPU in the main control computer central layer, the start control signal that reception is sent from televisor CPU, collector connects described divider resistance R2, grounded emitter.
When liquid crystal TV set start work, CPU is by its GPIO mouth output high level start control signal, control triode Q2 saturation conduction.After the grid voltage of P channel MOS tube Q1 was resistance R 1, R2 dividing potential drop, the magnitude of voltage at divider resistance R2 two ends, its level be not because the existence of charging capacitor C1 is not to become a certain fixed value immediately, but drop to V1 gradually by Vin.In this process, P channel MOS tube Q1 is along with the variation of its grid voltage, and its conducting degree constantly changes, and has so just realized the control to output voltage V out waveform.Change the parameter value of divider resistance R1, R2 and charging capacitor C1, can realize the adjusting of output voltage V out rising waveform, and then satisfy of the requirement of different liquid crystal displays TCON plate supply voltage rising waveform.
The utility model has been realized effective control of output voltage rising waveform by adopting above-mentioned simple circuit configuration, has satisfied the requirement of different liquid crystal displays to TCON plate supply voltage rising waveform, has made things convenient for technician's circuit design, has improved production efficiency.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection domain of the present utility model.
Claims (10)
1. voltage rising waveform controlable electric current is characterized in that: comprise the adjustable on-off circuit of a conducting degree, the control end of described on-off circuit connects a direct current power supply through first divider resistance on the one hand, on the other hand through the second divider resistance ground connection; Be parallel with a charging capacitor at the two ends of described first divider resistance, gating end one end of described on-off circuit connects described direct supply, and the other end connects the supply voltage output terminal.
2. voltage rising waveform controlable electric current according to claim 1, it is characterized in that: described on-off circuit is a P channel MOS tube, the grid of described metal-oxide-semiconductor is the control end of described on-off circuit, source electrode and drain electrode are the gating end of described on-off circuit, are connected between described direct supply and the supply voltage output terminal.
3. voltage rising waveform controlable electric current according to claim 1 and 2 is characterized in that: described second divider resistance is by a controllable switch element ground connection.
4. voltage rising waveform controlable electric current according to claim 3, it is characterized in that: described controllable switch element is a NPN type triode, the base stage connection control signal input end of described triode, collector connects described second divider resistance, grounded emitter.
5. voltage rising waveform controlable electric current according to claim 2 is characterized in that: be connected with filter capacitor at described supply voltage output terminal.
6. liquid crystal TV set with the described voltage rising waveform of claim 1 controlable electric current, it is characterized in that: comprise the adjustable on-off circuit of a conducting degree, the control end of described on-off circuit connects a direct current power supply through first divider resistance on the one hand, on the other hand through the second divider resistance ground connection; Be parallel with a charging capacitor at the two ends of described first divider resistance, gating end one end of described on-off circuit connects described direct supply, and the other end connects the supply voltage output terminal.
7. liquid crystal TV set according to claim 6, it is characterized in that: described on-off circuit is a P channel MOS tube, the grid of described metal-oxide-semiconductor is the control end of described on-off circuit, source electrode and drain electrode are the gating end of described on-off circuit, are connected between described direct supply and the supply voltage output terminal.
8. according to claim 6 or 7 described liquid crystal TV sets, it is characterized in that: described second divider resistance is by a controllable switch element ground connection.
9. liquid crystal TV set according to claim 8 is characterized in that: described controllable switch element is a NPN type triode, the base stage connection control signal input end of described triode, and collector connects described second divider resistance, grounded emitter.
10. liquid crystal TV set according to claim 7 is characterized in that: be connected with filter capacitor at described supply voltage output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620011353 CN200965775Y (en) | 2006-10-22 | 2006-10-22 | Voltage rising waveform controllable circuit and LCD TV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620011353 CN200965775Y (en) | 2006-10-22 | 2006-10-22 | Voltage rising waveform controllable circuit and LCD TV |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200965775Y true CN200965775Y (en) | 2007-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 200620011353 Expired - Fee Related CN200965775Y (en) | 2006-10-22 | 2006-10-22 | Voltage rising waveform controllable circuit and LCD TV |
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| CN (1) | CN200965775Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290332B (en) * | 2008-05-14 | 2010-10-13 | 深圳创维－Rgb电子有限公司 | Voltage up-down detection circuit and method |
| CN102035426A (en) * | 2010-12-17 | 2011-04-27 | 深圳市润天智图像技术有限公司 | Pulse slope control circuit |
| CN103809649A (en) * | 2012-11-07 | 2014-05-21 | 比亚迪股份有限公司 | Control circuit capable of achieving sequential control over output voltage |
| CN110071635A (en) * | 2018-01-24 | 2019-07-30 | 中科院微电子研究所昆山分所 | A kind of power on-off control circuit |
| WO2023240698A1 (en) * | 2022-06-17 | 2023-12-21 | 深圳市华星光电半导体显示技术有限公司 | Switch control circuit and backlight driving board |
-
2006
- 2006-10-22 CN CN 200620011353 patent/CN200965775Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290332B (en) * | 2008-05-14 | 2010-10-13 | 深圳创维－Rgb电子有限公司 | Voltage up-down detection circuit and method |
| CN102035426A (en) * | 2010-12-17 | 2011-04-27 | 深圳市润天智图像技术有限公司 | Pulse slope control circuit |
| CN103809649A (en) * | 2012-11-07 | 2014-05-21 | 比亚迪股份有限公司 | Control circuit capable of achieving sequential control over output voltage |
| CN110071635A (en) * | 2018-01-24 | 2019-07-30 | 中科院微电子研究所昆山分所 | A kind of power on-off control circuit |
| WO2023240698A1 (en) * | 2022-06-17 | 2023-12-21 | 深圳市华星光电半导体显示技术有限公司 | Switch control circuit and backlight driving board |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071024 Termination date: 20101022 |