CN217405090U - Auxiliary driving control circuit of liquid crystal display - Google Patents
Auxiliary driving control circuit of liquid crystal display Download PDFInfo
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- CN217405090U CN217405090U CN202123364491.2U CN202123364491U CN217405090U CN 217405090 U CN217405090 U CN 217405090U CN 202123364491 U CN202123364491 U CN 202123364491U CN 217405090 U CN217405090 U CN 217405090U
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- liquid crystal
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- tcon
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Abstract
The utility model discloses a LCD drive auxiliary control circuit, including the switching of TCON data signal, the remote end voltage measurement feedback, the data signal that the TCON board will produce conveys to drive auxiliary control circuit through the switching mouth, the data signal lug connection who conveys into is on the LCD screen, the change of remote end voltage measurement feedback real time monitoring voltage, and feed back the result that changes to the TCON board, the TCON board is according to the signal of remote end voltage measurement feedback, carry out corresponding output data signal adjustment, the continuous compensation difference that refreshes obtains the required full-color signal of TFT-LCD demonstration, show perfect image quality. The utility model discloses install on jumbo size LCD screen, compare traditional product framework and saved a drive circuit, utilize the function of distal end switching signal and real time monitoring voltage, the signal of synchronous adjustment TCON board output for jumbo size LCD screen high resolution output still has very strong anti-jamming ability simultaneously.
Description
Technical Field
The utility model relates to an electron field especially relates to a 38.5 cun LCD drive auxiliary control circuit.
Background
TFT-LCD is a large-scale semiconductor full-integrated circuit manufacturing technology adopting new materials and new processes, and is the basis of liquid crystal, inorganic and organic thin film electroluminescent flat panel displays. Thin film transistor liquid crystal displays (TFT-LCDs) have the characteristics of light weight, flat panel display, low power consumption, no radiation, excellent display quality, and the like, and their application fields are gradually expanding, and have been developed from displays such as audio and video products and notebook computers to monitors for desktop computers and Engineering Workstations (EWS), and the requirements for liquid crystal displays are also being developed toward high resolution and high colorization. The traditional large-size liquid crystal display (TFT-LCD) driving circuit is designed by a TCON board and a SOURCE board in a separated mode, the TCON board and the SOURCE board are connected through an anti-interference flexible flat cable, the TCON board is a core circuit for controlling the time sequence action of the TFT-LCD, controls when a scanning driving circuit is started, converts an input video signal (such as an LVDS signal) into a data signal form (such as a mini-LVDS signal or an RSDS signal) used by a data driving circuit, transmits the data signal form to the data driving circuit (COF IC), and controls the data driving circuit to be started at the right time; the design needs 3 PCBAs to form the whole TFT-LCD driving circuit aiming at a large-size display, so that the product cost is high and the market advantage is gradually lost.
Disclosure of Invention
The utility model aims at solving the technical problem and providing a liquid crystal display drive auxiliary control circuit.
In order to realize the technical purpose, reach foretell technical requirement, the utility model discloses the technical scheme who adopts is: a liquid crystal display drive auxiliary control circuit is characterized in that: the method comprises the steps of TCON data signal switching and remote voltage measurement feedback, wherein a TCON board transmits generated data signals to a driving auxiliary control circuit through a switching port, the transmitted data signals are directly connected to a liquid crystal display, the remote voltage measurement feedback monitors the voltage change in real time and feeds the change result back to the TCON board, the TCON board carries out corresponding output data signal adjustment according to the remote voltage measurement feedback signals, the compensation difference value is continuously refreshed to obtain full-color signals required by TFT-LCD display, and perfect image quality is displayed.
Preferably: the TCON data signal relay comprises a connector J1, pins 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, 31, 32, 33, 34, 35, 36, 38 and 39 of the connector J1 are connected with a liquid crystal screen, and pins 25 and 26 of the connector J1 are connected with a TCON board.
Preferably: the far-end voltage measurement feedback comprises a chip U1, wherein 4 pins of the chip U1 are connected with 6 pins, 7 pins and 8 pins of a connector J1, and a capacitor C1 is connected to a circuit; the pins 1, 7, 8 and 14 of the chip U1 are respectively connected with the resistors and then connected with the liquid crystal screen, and the pins 2, 6, 9 and 13 of the chip U1 are respectively connected with the liquid crystal screen.
Compared with the traditional structure, the beneficial effects of the utility model are that:
1. the utility model discloses install on jumbo size LCD screen, compare traditional product framework and saved a drive circuit, utilize the function of distal end switching signal and real time monitoring's voltage, the signal of synchronous adjustment TCON board output for jumbo size LCD screen high resolution output still has very strong interference killing feature simultaneously.
2. The utility model discloses can effectual solution jumbo size LCD screen to the dimensional requirement of printed circuit board, overall arrangement that can be nimble solves jumbo size TFT-LCD's production and does not have a supporting drive control panel difficult problem.
Drawings
FIG. 1 is a schematic diagram of a conventional liquid crystal driving circuit;
FIG. 2 is a schematic view of the overall structure of the present invention;
fig. 3 is a schematic diagram of the TCON data signal switching structure of the present invention;
fig. 4 is a schematic diagram of the far-end voltage measurement feedback structure of the present invention;
in the figure: 1. TCON data signal switching, 2, remote voltage measurement feedback.
Detailed Description
The present invention will be further explained below.
Referring to the drawings, an auxiliary control circuit for driving a liquid crystal display is characterized in that: the method comprises a TCON data signal switching 1 and a remote voltage measurement feedback 2, wherein the TCON board transmits a generated data signal to a driving auxiliary control circuit through a switching port, the transmitted data signal is directly connected to a liquid crystal display, the remote voltage measurement feedback 2 monitors the voltage change in real time and feeds the change result back to the TCON board, the TCON board carries out corresponding output data signal adjustment according to the signal of the remote voltage measurement feedback 2, a compensation difference value is continuously refreshed to obtain a full-color signal required by TFT-LCD display, and perfect image quality is displayed.
In the preferred embodiment, the TCON data signal relay 1 includes a connector J1, pins 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, 31, 32, 33, 34, 35, 36, 38, 39 of the connector J1 are connected to the lcd panel, and pins 25, 26 of the connector J1 are connected to the TCON board.
In the preferred embodiment, the remote voltage measurement feedback 2 comprises a chip U1, the 4 pins of the chip U1 are connected with the 6 pins, the 7 pins and the 8 pins of the connector J1, and a capacitor C1 is further connected to the circuit; and the pins 1, 7, 8 and 14 of the chip U1 are respectively connected with the liquid crystal screen after being connected with the resistors, and the pins 2, 6, 9 and 13 of the chip U1 are respectively connected with the liquid crystal screen.
In specific implementation, the data signal of the TCON is transferred, namely the data signal processed by the TCON board is transmitted to the driving auxiliary control circuit, and is connected with the TCON board through the flexible flat cable to transmit the signal to the liquid crystal screen. The data signal processed by the TCON board is transferred into a 38.5 inch TFT-LCD driving auxiliary control circuit through a connector J1, wherein VGH255, VGH223, VGH191, VGH127, VGH63, VGH31, VGH0, VGL0, VGL31, VGL63, VGL127, VGL191, VGL223, VGL255, POL, TP, MLB1P, MLB1N, MLB2P, MLB2N, MLB3P, MLB3N, MLBCLKP and MLBCLKN are directly connected to the liquid crystal screen. VDDA voltage generated by the TCON board is connected to a chip U1 through a connector J1, noise waves of the chip U1 are filtered by a capacitor C11 uF, voltage changes in the liquid crystal screen are monitored in real time through ports Y5, Y6, Y7, Y8, YO5, YO6, YO7 and YO8, and then the voltage changes are transmitted to the TCON board through POL and TP interfaces in the connector J1 to perform corresponding voltage adjustment; and continuously refreshing the adjusted voltage according to the clock signals of MLBCLKP and MLBCLKn to realize compensation difference, ensuring to output full-color signals required by the TFT-LCD and showing perfect image quality.
The above embodiments of the present invention are only examples for clearly illustrating the present invention, but not for limiting the scope of the present invention, and all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (3)
1. A liquid crystal display drive auxiliary control circuit is characterized in that: the display device comprises a TCON data signal switching (1) and a remote voltage measurement feedback (2), wherein a TCON board transmits a generated data signal to a driving auxiliary control circuit through a switching port, the transmitted data signal is directly connected to a liquid crystal display, the remote voltage measurement feedback (2) monitors the change of voltage in real time and feeds the change result back to the TCON board, the TCON board carries out corresponding output data signal adjustment according to the signal of the remote voltage measurement feedback (2), and the difference value is continuously refreshed to obtain a full-color signal required by TFT-LCD display.
2. The auxiliary control circuit for driving liquid crystal display according to claim 1, wherein: the TCON data signal adapter (1) comprises a connector J1, wherein pins 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, 31, 32, 33, 34, 35, 36, 38 and 39 of the connector J1 are connected with a liquid crystal screen, and pins 25 and 26 of the connector J1 are connected with a TCON board.
3. The auxiliary control circuit for driving liquid crystal display according to claim 1, wherein: the far-end voltage measurement feedback (2) comprises a chip U1, wherein 4 pins of the chip U1 are connected with 6 pins, 7 pins and 8 pins of a connector J1, and a capacitor C1 is connected to the circuit; and the pins 1, 7, 8 and 14 of the chip U1 are respectively connected with the liquid crystal screen after being connected with the resistors, and the pins 2, 6, 9 and 13 of the chip U1 are respectively connected with the liquid crystal screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123364491.2U CN217405090U (en) | 2021-12-30 | 2021-12-30 | Auxiliary driving control circuit of liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123364491.2U CN217405090U (en) | 2021-12-30 | 2021-12-30 | Auxiliary driving control circuit of liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217405090U true CN217405090U (en) | 2022-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123364491.2U Active CN217405090U (en) | 2021-12-30 | 2021-12-30 | Auxiliary driving control circuit of liquid crystal display |
Country Status (1)
| Country | Link |
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| CN (1) | CN217405090U (en) |
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2021
- 2021-12-30 CN CN202123364491.2U patent/CN217405090U/en active Active
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