CN110706670B - TCON drive circuit applied to ultra-high-definition liquid crystal display screen - Google Patents
TCON drive circuit applied to ultra-high-definition liquid crystal display screen Download PDFInfo
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- CN110706670B CN110706670B CN201910899726.6A CN201910899726A CN110706670B CN 110706670 B CN110706670 B CN 110706670B CN 201910899726 A CN201910899726 A CN 201910899726A CN 110706670 B CN110706670 B CN 110706670B
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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Abstract
The TCON drive circuit applied to the ultra-high clear liquid crystal display screen is provided with the connecting terminal, the main control module, the storage module, the processing module and the output module. In the practical application process, the electrostatic protection unit can process static electricity, prevent overlarge electrostatic current from enabling the circuit to not work normally, ensure that the circuit can stably output related signals and voltage values to the liquid crystal display screen, and enable the liquid crystal display screen to form images stably; in addition, the voltage output unit can output pixel voltage, starting voltage, switching-off voltage, bias voltage and multi-channel color level signals to the output module by processing the setting of the chip, the voltage output unit and the color level unit, so that the liquid crystal display screen can stably form images, the imaging definition, the color gamut, the brightness and the like of the liquid crystal display screen are improved, and the liquid crystal display screen can realize ultrahigh-definition imaging.
Description
Technical Field
The invention relates to the technical field of driving circuits, in particular to a TCON driving circuit applied to an ultra-high-definition liquid crystal display screen.
Background
At present, a Liquid Crystal Display (LCD) is called Liquid Crystal Display (LCD) for short, and belongs to a flat panel Display. The screen display device is used for screen display of televisions and computers. The display screen has the advantages of low power consumption, small size and low radiation. The liquid crystal display screen uses liquid crystal solution in two pieces of polarization materials, so that the crystal can be rearranged to achieve the purpose of imaging when current passes through the liquid. Liquid Crystal Displays (LCDs) are used in digital watches and one type of display for many portable computers. The LCD display uses two sheets of polarized material with a liquid crystal solution between them. When current is passed through the liquid, the crystals will rearrange so that light cannot pass through them. Thus, each crystal acts like a louver, both allowing light to pass through and blocking light. Liquid Crystal Display (LCD) technology information products are now developed toward the goals of being light, thin, short, and small, and it is certainly no exception to display products having a long history in the computer periphery. Under the precondition of easy carrying and transportation, the conventional display methods such as CRT video display and LED display are all limited by the factors of too large volume or huge power consumption, which cannot meet the practical requirements of users. The development of the liquid crystal display technology is just in line with the trend of the current information products, and the user can enjoy the best visual environment no matter the advantages of right-angle display, low power consumption, small volume, zero radiation and the like.
For the liquid crystal display screen to perform imaging, a TCON driving circuit is required to be arranged in the liquid crystal television, and the TCON driving circuit is used for inputting relevant signals and voltages to the liquid crystal display screen so that the liquid crystal display screen can clearly perform imaging. However, the conventional TCON driving circuit has many defects, and first, the conventional TCON driving circuit is not reliable in stability, and the conventional TCON driving circuit often has a large amount of static current and cannot stably operate. Namely, the relevant signals or voltages cannot be stably output to the liquid crystal display screen, so that the liquid crystal display screen performs imaging; secondly, the existing TCON driving circuit has insufficient signal types output to the liquid crystal display, so that when the liquid crystal display performs imaging in the later period, the imaged image has the problems of low definition, low color gamut, poor transparency, lack of details of the image and the like, namely, the imaging quality of the liquid crystal display is poor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the TCON driving circuit which can process the static current, prevent the overlarge static current from enabling the circuit to work normally, ensure that the circuit can stably output related signals and voltage values to the liquid crystal display screen and can output various signals to the liquid crystal display screen, and improve the imaging quality of the liquid crystal display screen.
The purpose of the invention is realized by the following technical scheme:
a TCON driving circuit applied to an ultra-high-definition liquid crystal display screen comprises:
a connection terminal for connecting an external power supply and an external device;
the main control module comprises a TCON chip and an electrostatic protection unit, and the electrostatic protection unit is respectively connected with the TCON chip and the connecting terminal;
the storage module is respectively connected with the TCON chip and the connecting terminal;
the processing module comprises a processing chip, a voltage output unit and a color gradation unit, the processing chip is connected with the storage module, a clock signal input end of the processing chip is connected with a clock signal output end of the TCON chip, the voltage output unit is connected with the processing chip, the voltage output unit is also connected with an external power supply, and the color gradation unit is connected with the processing chip; and
and the input end of the output module is respectively connected with the TCON chip, the voltage output unit and the color gradation unit, and the output end of the output module is used for being connected with a liquid crystal display screen.
In one embodiment, the electrostatic protection unit includes a plurality of electrostatic protection tubes DT, in one of the electrostatic protection tubes DT, the 1 st, 2 nd, 4 th and 5 th pins of the electrostatic protection tube DT are connected to the TCON chip, the 6 th, 7 th, 9 th and 10 th pins of the electrostatic protection tube DT are connected to the connection terminals, and the 3 rd and 8 th pins of the electrostatic protection tube DT are grounded.
In one embodiment, the voltage output unit includes:
a pixel voltage output branch, including an inductor L208, a switching tube Q205, a resistor R268, a resistor R269, a resistor R215, a capacitor C226, a resistor R270, a resistor R271, a diode D207, a capacitor C263, a switching tube Q204, a capacitor C264, a capacitor C265, a capacitor C266, a capacitor C267, a capacitor C268, a resistor R266, and a resistor R264, where one end of the inductor L208 is connected to an external power source, the other end of the inductor L208 is connected to a drain of the switching tube Q205, a source of the switching tube Q205 is connected to the processing chip, a gate of the switching tube Q205 is connected to one end of the resistor R268 and one end of the resistor R269, the other end of the resistor R268 is connected to the processing chip, the other end of the resistor R269 is connected to ground, one end of the resistor R215 is connected to the processing chip, the other end of the resistor R215 is connected in series with the capacitor C226, and one end of the resistor R270 is connected to ground, the other end of the resistor R270 is connected to the source of the switching tube Q205, one end of the resistor R271 is grounded, the other end of the resistor R271 is connected to the source of the switching tube Q205, the anode of the diode D207 is connected to the drain of the switching tube Q205, the cathode of the diode D207 is connected in series to the capacitor C263 and connected to the processing chip, the drain of the switching tube Q204 is connected to the cathode of the diode D207, the source of the switching tube Q204 is connected in series to the capacitor C264 and connected to the gate of the switching tube Q204, the gate of the switching tube Q204 is connected in series to the resistor R264 and connected to the input end of the output module, one end of the capacitor C265, one end of the capacitor C266, one end of the capacitor C267 and one end of the capacitor C268 and one end of the resistor R266 are all connected to the gate of the switching tube Q204, and the other end of the capacitor C265, the other end of the capacitor C266, the drain of the capacitor C263 and the processing chip are connected to the processing chip, The other end of the capacitor C267, the other end of the capacitor C268 and the other end of the resistor R266 are both grounded;
a voltage reduction output branch circuit, which comprises an inductor L204, a resistor R235, a resistor R237, a resistor R249, a diode D202, a capacitor C240, a capacitor C241 and a capacitor C242, one end of the inductor L204 is connected with the processing chip, the other end of the inductor L204 is connected with the TCON chip in series with the resistor R235, one end of the resistor R237 is connected with the other end of the inductor L204, the other end of the resistor R237 is connected in series with the resistor R249 and is grounded, the other end of the resistor R237 is further connected to the processing chip, the cathode of the diode D202 is connected to one end of the inductor L204, an anode of the diode D202 is connected to one end of the capacitor C240, one end of the capacitor C241, and one end of the capacitor C242, the other end of the capacitor C240, the other end of the capacitor C241 and the other end of the capacitor C242 are all connected with the other end of the inductor L204;
a starting voltage output branch circuit, the starting voltage output branch circuit includes a capacitor C236, an inductor L205, a switch tube Q201, a resistor R246, a resistor R247, a diode D203, a capacitor C237, a capacitor C238, a resistor R242, and a resistor R239, one end of the capacitor C236 is connected with the other end of the resistor R269, the other end of the capacitor C236 is connected in series with the inductor L205 and the drain of the switch tube Q201, the gate of the switch tube Q201 is connected with the processing chip, the source of the switch tube Q201 is connected with the processing chip, one end of the resistor R246 is connected with the gate of the switch tube Q201, the other end of the resistor R246 is grounded, one end of the resistor R247 is connected with the source of the switch tube Q201, the other end of the resistor R247 is grounded, the anode of the diode D203 is connected with the drain of the switch tube Q201, and the cathode of the diode D203 is connected with the processing chip, one end of the capacitor C237, one end of the capacitor C238 and one end of the resistor R242 are all connected to the cathode of the diode D203, the other end of the capacitor C237, the other end of the capacitor C238 and the other end of the resistor R242 are all grounded, one end of the resistor R239 is connected to the cathode of the diode D203, and the other end of the resistor R239 is connected to the input end of the output module;
a turn-off voltage output branch circuit, which includes a switching tube Q202, a diode D204, a capacitor C252, a capacitor C253, a resistor R256, and a resistor R257, wherein a source of the switching tube Q202 is connected to the processing chip, a drain of the switching tube Q202 is connected to the processing chip, a gate of the switching tube Q202 is connected to a cathode of the diode D204, an anode of the diode D204 is connected to one end of the capacitor C253, one end of the capacitor C252, and one end of the resistor R257, respectively, the other end of the capacitor C253, the other end of the capacitor C252, and the other end of the resistor R257 are all grounded, one end of the resistor R256 is connected to one end of the processing chip and one end of the resistor R257, and the other end of the resistor R256 is connected to an input end of the output module;
the bias voltage output branch circuit comprises a resistor R213 and a resistor R214, one end of the resistor R214 is connected with the processing chip, the other end of the resistor R214 is connected with the input end of the output module, one end of the resistor R213 is connected with one end of the resistor R214, and the other end of the resistor R213 is grounded.
In one embodiment, the pixel voltage output branch further includes a capacitor C269, one end of the capacitor C269 is connected to one end of the capacitor C263, and the other end of the capacitor C269 is grounded.
In one embodiment, the pixel voltage output branch further includes a capacitor C270, and the capacitor C270 is connected in parallel with the capacitor C269.
In one embodiment, the step-down output branch further includes a resistor R240 and a capacitor C243, one end of the resistor R240 is connected to the cathode of the diode D202, and the other end of the resistor R240 is connected in series with the capacitor C243 and the anode of the diode D202.
In one embodiment, the starting voltage output branch further includes a capacitor C228, one end of the capacitor C228 is connected to the other end of the resistor R239, and the other end of the capacitor C228 is grounded.
In one embodiment, the turn-off voltage output branch further includes an inductor L207, one end of the inductor L207 is connected to the cathode of the diode D204, and the other end of the inductor L207 is grounded.
In one embodiment, the color level unit includes multiple color level output branches, and in one color level output branch, the color level output branch includes a color level resistor and a color level capacitor, one end of the color level resistor is connected to the processing chip, the other end of the color level resistor is connected in series to the ground of the color level capacitor, and the other end of the color level resistor is further connected to the input end of the output module.
In one embodiment, the model of the TCON chip is CSQ 12222-A0N.
In one embodiment, the processing chip has a model number of CS 602-A0R.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the TCON drive circuit applied to the ultra-high clear liquid crystal display screen is provided with the connecting terminal, the main control module, the storage module, the processing module and the output module. In the practical application process, the electrostatic protection unit can process static electricity, prevent overlarge electrostatic current from enabling the circuit to not work normally, ensure that the circuit can stably output related signals and voltage values to the liquid crystal display screen, and enable the liquid crystal display screen to form images stably; in addition, the voltage output unit can output pixel voltage, starting voltage, switching-off voltage, bias voltage and multi-channel color level signals to the output module by processing the setting of the chip, the voltage output unit and the color level unit, so that the liquid crystal display screen can stably form images, the imaging definition, the color gamut, the brightness and the like of the liquid crystal display screen are improved, and the liquid crystal display screen can realize ultrahigh-definition imaging.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic block diagram of a TCON driving circuit applied to an ultra-high-definition liquid crystal display panel according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a TCON chip according to an embodiment of the invention;
FIG. 3 is a schematic circuit diagram of a processing chip according to an embodiment of the invention;
FIG. 4 is a schematic circuit diagram of a pixel voltage output branch according to an embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a buck output branch according to an embodiment of the present invention;
FIG. 6 is a schematic circuit diagram of a turn-on voltage output branch according to an embodiment of the present invention;
FIG. 7 is a schematic circuit diagram of the turn-off voltage output branch according to an embodiment of the present invention;
FIG. 8 is a schematic circuit diagram of a bias voltage output branch according to an embodiment of the present invention;
FIG. 9 is a schematic circuit diagram of a gradation unit according to an embodiment of the present invention;
fig. 10 is a schematic circuit diagram of an electrostatic protection unit according to an embodiment of the invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a TCON driving circuit 10 for an ultra-high definition display screen includes a connection terminal 100, a main control module 200, a storage module 300, a processing module 400, and an output module 500.
Thus, it should be noted that the connection terminal 100 functions as a connection; the main control module 200 plays a role of control; the storage module 300 plays a role of storage; the processing module 400 is used for processing relevant signals and voltages and inputting the processed signals and voltages into relevant functional modules; the output module 500 plays a role in outputting signals and voltages, and enables ultra-high definition imaging of the liquid crystal display screen.
Referring to fig. 1, the connection terminal 100 is used for connecting an external power source and an external device.
In this manner, the connection terminal 100 functions as a connection for inputting an external power supply voltage into the circuit and inputting a signal of an external device into the circuit.
Referring to fig. 1 and 2, the main control module 200 includes a TCON chip 210 and an electrostatic protection unit 220, and the electrostatic protection unit 220 is connected to the TCON chip 210 and the connection terminal 100, respectively.
Thus, it should be noted that the TCON chip 210 plays a role of control; the setting of electrostatic protection unit 220 can handle static, prevents that too big electrostatic current from letting the unable normal work of circuit, guarantees that the circuit can stable output relevant signal and magnitude of voltage to liquid crystal display in, lets liquid crystal display form images steadily.
It should also be noted that the model of the TCON chip 210 is CSQ12222-A0N, and the operation principle thereof is not described in detail and is well known to those skilled in the art.
Referring to fig. 1, a memory module 300 is connected to the TCON chip 210 and the connection terminal 100, respectively.
Thus, it should be noted that the storage module 300 plays a role of storage.
Referring to fig. 1 and 3, the processing module 400 includes a processing chip 410, a voltage output unit 420 and a color level unit 430, the processing chip 410 is connected to the storage module 300, a clock signal input terminal of the processing chip 410 is connected to a clock signal output terminal of the TCON chip 210, the voltage output unit 420 is connected to the processing chip 410, the voltage output unit 420 is further connected to an external power source, and the color level unit 430 is connected to the processing chip 410.
As such, it should be noted that the processing chip 410 performs signal processing, signal output, and voltage processing; the voltage output unit 420 is used for voltage output; the tone scale unit 430 is used for outputting the output of the tone scale signal.
It should be noted that the model of the processing chip 410 is CS602-A0R, and the operation principle thereof is not described in detail and is well known to those skilled in the art.
Referring to fig. 1, an input end of the output module 500 is connected to the TCON chip 210, the voltage output unit 420, and the color level unit 430, respectively, and an output end of the output module 500 is used for being connected to the liquid crystal display.
Thus, it should be noted that the output module 500 is used for outputting a signal to the liquid crystal display to make the liquid crystal display form an image.
Further, referring to fig. 10, in one embodiment, the electrostatic protection unit 220 includes a plurality of electrostatic protection tubes DT, in one electrostatic protection tube DT, the 1 st, 2 nd, 4 th and 5 th pins of the electrostatic protection tube DT are connected to the TCON chip 210, the 6 th, 7 th, 9 th and 10 th pins of the electrostatic protection tube DT are connected to the connection terminal 100, and the 3 rd and 8 th pins of the electrostatic protection tube DT are grounded.
In this way, it should be noted that the electrostatic protection tube DT plays a role of electrostatic protection to prevent the circuit from failing to work normally due to an excessive electrostatic current. Specifically, in the present application, the electrostatic protection unit 220 includes 4 electrostatic protection tubes DT, respectively electrostatic protection tube DT101, electrostatic protection tube DT102, electrostatic protection tube DT103, and electrostatic protection tube DT 104.
Further, referring to fig. 4, 5, 6, 7, 8 and 9 together, in an embodiment, the voltage output unit 420 includes:
referring to fig. 4 again, the pixel voltage output branch 421 includes an inductor L208, a switch Q205, a resistor R268, a resistor R269, a resistor R215, a capacitor C226, a resistor R270, a resistor R271, a diode D207, a capacitor C263, a switch Q204, a capacitor C264, a capacitor C265, a capacitor C266, a capacitor C267, a capacitor C268, a resistor R266, and a resistor R264, one end of the inductor L208 is connected to an external power source, the other end of the inductor L208 is connected to the drain of the switch Q205, the source of the switch Q205 is connected to the processing chip 410, the gate of the switch Q205 is connected to one end of the resistor R268 and one end of the resistor R269, the other end of the resistor R268 is connected to the processing chip 410, the other end of the resistor R215 is connected to ground, one end of the resistor R215 is connected to the processing chip 410, the other end of the resistor R215 is connected to the capacitor C226 in series, one end of the resistor R270 is connected to the ground, the other end of the resistor R270 is connected to the source of the switch Q205, one end of the resistor R271 is grounded, the other end of the resistor R271 is connected with the source of the switch tube Q205, the anode of the diode D207 is connected with the drain of the switch tube Q205, the cathode series capacitor C263 of the diode D207 is connected with the processing chip, the drain of the switch tube Q204 is connected with the cathode of the diode D207, the source series capacitor C264 of the switch tube Q204 is connected with the gate of the switch tube Q204, the gate series resistor R264 of the switch tube Q204 is connected with the input end of the output module 500, one end of the capacitor C265, one end of the capacitor C266, one end of the capacitor C267, one end of the capacitor C268 and one end of the resistor R266 are all connected with the gate of the switch tube Q204, and the other end of the capacitor C265, the other end of the capacitor C266, the other end of the capacitor C267, the other end of the capacitor C268 and the other end of the resistor R266 are all grounded.
Thus, it should be noted that the inductor L208 plays a role of filtering; the switch Q205 functions as a switch, and the voltage of the external power source is input into the processing chip 410 from the switch Q205 through the resistor R268 and the resistor R269, and finally output from the gate of the switch Q204 to the input terminal of the output module 500.
It should be further noted that the switching tube Q204, the capacitor C264, the capacitor C265, the capacitor C266, the capacitor C267, the capacitor C268 and the processing chip 410 form a BOOST network, BOOST the output voltage, and finally output the boosted voltage to the output module 500 to provide the pixel voltage of the liquid crystal display screen; the resistor R270 and the resistor R271 are both current-limiting resistors.
Referring to fig. 5 again, the step-down output branch 422 includes an inductor L204, a resistor R235, a resistor R237, a resistor R249, a diode D202, a capacitor C240, a capacitor C241, and a capacitor C242, one end of the inductor L204 is connected to the processing chip 410, the other end of the inductor L204 is connected to the TCON chip 210 in series through the resistor R235, one end of the resistor R237 is connected to the other end of the inductor L204, the other end of the resistor R237 is connected to ground through the resistor R249 in series, the other end of the resistor R237 is further connected to the processing chip 410, a cathode of the diode D202 is connected to one end of the inductor L204, an anode of the diode D202 is connected to one end of the capacitor C240, one end of the capacitor C241, and one end of the capacitor C242, and the other end of the capacitor C240, the other end of the capacitor C241, and the other end of the capacitor C242 are connected to the other end of the inductor L204.
In this way, it should be noted that the inductor L204, the capacitor C240, the capacitor C241, and the capacitor C242 filter the voltage; the diode D202 plays a role in preventing backflow; the resistor R237 and the resistor R249 form a feedback network; the step-down output branch 422 and the processing chip 410 form a step-down network to step down the voltage, and the stepped-down voltage is input into the TCON chip 210 to supply power to the TCON chip 210.
Referring to fig. 6 again, the start-up voltage output branch 423 includes a capacitor C236, an inductor L205, a switch Q201, a resistor R246, a resistor R247, a diode D203, a capacitor C237, a capacitor C238, a resistor R242, and a resistor R239, one end of the capacitor C236 is connected to the other end of the resistor R269, the other end of the capacitor C236 is connected in series with the inductor L205 and the drain of the switch Q201, the gate of the switch Q201 is connected to the processing chip 410, the source of the switch Q201 is connected to the processing chip 410, one end of the resistor R246 is connected to the gate of the switch Q201, the other end of the resistor R246 is grounded, one end of the resistor R247 is connected to the source of the switch Q201, the other end of the resistor R247 is grounded, the anode of the diode D203 is connected to the drain of the switch Q201, the cathode of the diode D203 is connected to the processing chip 410, one end of the capacitor C237, one end of the capacitor C238 and one end of the resistor R242 are connected to the cathode of the diode D203, the other end of the capacitor C237, the other end of the capacitor C238, and the other end of the resistor R242 are all grounded, one end of the resistor R239 is connected to the cathode of the diode D203, and the other end of the resistor R239 is connected to the input end of the output module 500.
In this way, it should be noted that the voltage is filtered by the capacitor C236 and the inductor L205, and then input to the drain of the switching tube S201, and then input to the processing chip 410 through the switching tube S201; the capacitor C237, the capacitor C238 and the resistor R242 filter the voltage, and finally output the voltage to the output module 500 from the resistor R239, and the start voltage output branch 423 and the processing chip 410 form a BOOST network to provide the start voltage for the liquid crystal display.
Referring to fig. 7 again, the turn-off voltage output branch 424 includes a switch tube Q202, a diode D204, a capacitor C252, a capacitor C253, a resistor R256, and a resistor R257, a source of the switch tube Q202 is connected to the processing chip 410, a drain of the switch tube Q202 is connected to the processing chip 410, a gate of the switch tube Q202 is connected to a cathode of the diode D204, an anode of the diode D204 is connected to one end of the capacitor C253, one end of the capacitor C252, and one end of the resistor R257, the other end of the capacitor C253, the other end of the capacitor C252, and the other end of the resistor R257 are all grounded, one end of the resistor R256 is connected to one end of the processing chip 410 and one end of the resistor R257, and the other end of the resistor R256 is connected to an input end of the output module 500.
Therefore, it should be noted that the capacitor C252 and the capacitor C253 both play a role of filtering, and the shutdown voltage output branch 424 and the processing chip 410 form a Buck-Boost network for outputting the shutdown voltage to the liquid crystal display.
Referring to fig. 8 again, the bias voltage output branch 425 includes a resistor R213 and a resistor R214, one end of the resistor R214 is connected to the processing chip 410, the other end of the resistor R214 is connected to the input end of the output module 500, one end of the resistor R213 is connected to one end of the resistor R214, and the other end of the resistor R213 is grounded.
In this way, the bias voltage output branch 425 and the processing chip 410 form a voltage reduction network, and output the bias voltage to the liquid crystal display.
Further, referring to fig. 4 again, in an embodiment, the pixel voltage output branch 421 further includes a capacitor C269, one end of the capacitor C269 is connected to one end of the capacitor C263, and the other end of the capacitor C269 is grounded.
Thus, it should be noted that the capacitor C269 plays a role of filtering to eliminate noise.
Further, referring to fig. 4 again, in an embodiment, the pixel voltage output branch 421 further includes a capacitor C270, and the capacitor C270 is connected in parallel with the capacitor C269.
Thus, it should be noted that the capacitor C270 functions as a filter to eliminate noise.
Further, referring to fig. 5 again, in an embodiment, the step-down output branch 422 further includes a resistor R240 and a capacitor C243, one end of the resistor R240 is connected to the cathode of the diode D202, and the other end of the resistor R240 is connected in series with the capacitor C243 and the anode of the diode D202.
In this way, it should be noted that the resistor R240 and the capacitor C243 form a filter network to perform a filtering function.
Further, referring to fig. 6 again, in an embodiment, the turn-on voltage output branch 423 further includes a capacitor C228, one end of the capacitor C228 is connected to the other end of the resistor R239, and the other end of the capacitor C228 is grounded.
Thus, it should be noted that the capacitor C228 functions as a filter.
Further, referring to fig. 7 again, in an embodiment, the turn-off voltage output branch 424 further includes an inductor L207, one end of the inductor L207 is connected to the cathode of the diode D204, and the other end of the inductor L207 is grounded.
Thus, it should be noted that the inductor L207 plays a role of filtering to eliminate noise.
Further, referring to fig. 9, in an embodiment, the color level unit 430 includes multiple color level output branches, and in one color level output branch, the color level output branch includes a color level resistor and a color level capacitor, one end of the color level resistor is connected to the processing chip 410, the other end of the color level resistor is connected in series with the color level capacitor and grounded, and the other end of the color level resistor is further connected to the input end of the output module 500.
Therefore, it should be noted that the tone scale output branches are all used for outputting tone scale signals, and the tone scale resistors specifically include tone scale resistors R600-611; the color level capacitor specifically comprises color level capacitors C272-285.
The TCON drive circuit applied to the ultra-high clear liquid crystal display screen is provided with the connecting terminal, the main control module, the storage module, the processing module and the output module. In the practical application process, the electrostatic protection unit can process static electricity, prevent overlarge electrostatic current from enabling the circuit to not work normally, ensure that the circuit can stably output related signals and voltage values to the liquid crystal display screen, and enable the liquid crystal display screen to form images stably; in addition, the voltage output unit can output pixel voltage, starting voltage, switching-off voltage, bias voltage and multi-channel color level signals to the output module by processing the setting of the chip, the voltage output unit and the color level unit, so that the liquid crystal display screen can stably form images, the imaging definition, the color gamut, the brightness and the like of the liquid crystal display screen are improved, and the liquid crystal display screen can realize ultrahigh-definition imaging.
The above embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A TCON driving circuit applied to an ultra-high-definition liquid crystal display screen is characterized by comprising:
a connection terminal for connecting an external power supply and an external device;
the main control module comprises a TCON chip and an electrostatic protection unit, and the electrostatic protection unit is respectively connected with the TCON chip and the connecting terminal;
the storage module is respectively connected with the TCON chip and the connecting terminal;
the processing module comprises a processing chip, a voltage output unit and a color gradation unit, the processing chip is connected with the storage module, a clock signal input end of the processing chip is connected with a clock signal output end of the TCON chip, the voltage output unit is connected with the processing chip, the voltage output unit is also connected with an external power supply, and the color gradation unit is connected with the processing chip; and
the input end of the output module is respectively connected with the TCON chip, the voltage output unit and the color level unit, and the output end of the output module is used for being connected with a liquid crystal display screen;
the voltage output unit includes:
a pixel voltage output branch, including an inductor L208, a switching tube Q205, a resistor R268, a resistor R269, a resistor R215, a capacitor C226, a resistor R270, a resistor R271, a diode D207, a capacitor C263, a switching tube Q204, a capacitor C264, a capacitor C265, a capacitor C266, a capacitor C267, a capacitor C268, a resistor R266, and a resistor R264, where one end of the inductor L208 is connected to an external power source, the other end of the inductor L208 is connected to a drain of the switching tube Q205, a source of the switching tube Q205 is connected to the processing chip, a gate of the switching tube Q205 is connected to one end of the resistor R268 and one end of the resistor R269, the other end of the resistor R268 is connected to the processing chip, the other end of the resistor R269 is connected to ground, one end of the resistor R215 is connected to the processing chip, the other end of the resistor R215 is connected in series with the capacitor C226, and one end of the resistor R270 is connected to ground, the other end of the resistor R270 is connected to the source of the switching tube Q205, one end of the resistor R271 is grounded, the other end of the resistor R271 is connected to the source of the switching tube Q205, the anode of the diode D207 is connected to the drain of the switching tube Q205, the cathode of the diode D207 is connected in series to the capacitor C263 and connected to the processing chip, the drain of the switching tube Q204 is connected to the cathode of the diode D207, the source of the switching tube Q204 is connected in series to the capacitor C264 and connected to the gate of the switching tube Q204, the gate of the switching tube Q204 is connected in series to the resistor R264 and connected to the input end of the output module, one end of the capacitor C265, one end of the capacitor C266, one end of the capacitor C267 and one end of the capacitor C268 and one end of the resistor R266 are all connected to the gate of the switching tube Q204, and the other end of the capacitor C265, the other end of the capacitor C266, the drain of the capacitor C263 and the processing chip are connected to the processing chip, The other end of the capacitor C267, the other end of the capacitor C268 and the other end of the resistor R266 are both grounded;
a voltage reduction output branch circuit, which comprises an inductor L204, a resistor R235, a resistor R237, a resistor R249, a diode D202, a capacitor C240, a capacitor C241 and a capacitor C242, one end of the inductor L204 is connected with the processing chip, the other end of the inductor L204 is connected with the TCON chip in series with the resistor R235, one end of the resistor R237 is connected with the other end of the inductor L204, the other end of the resistor R237 is connected in series with the resistor R249 and is grounded, the other end of the resistor R237 is further connected to the processing chip, the cathode of the diode D202 is connected to one end of the inductor L204, an anode of the diode D202 is connected to one end of the capacitor C240, one end of the capacitor C241, and one end of the capacitor C242, the other end of the capacitor C240, the other end of the capacitor C241 and the other end of the capacitor C242 are all connected with the other end of the inductor L204;
a starting voltage output branch circuit, the starting voltage output branch circuit includes a capacitor C236, an inductor L205, a switch tube Q201, a resistor R246, a resistor R247, a diode D203, a capacitor C237, a capacitor C238, a resistor R242, and a resistor R239, one end of the capacitor C236 is connected with the other end of the resistor R269, the other end of the capacitor C236 is connected in series with the inductor L205 and the drain of the switch tube Q201, the gate of the switch tube Q201 is connected with the processing chip, the source of the switch tube Q201 is connected with the processing chip, one end of the resistor R246 is connected with the gate of the switch tube Q201, the other end of the resistor R246 is grounded, one end of the resistor R247 is connected with the source of the switch tube Q201, the other end of the resistor R247 is grounded, the anode of the diode D203 is connected with the drain of the switch tube Q201, and the cathode of the diode D203 is connected with the processing chip, one end of the capacitor C237, one end of the capacitor C238 and one end of the resistor R242 are all connected to the cathode of the diode D203, the other end of the capacitor C237, the other end of the capacitor C238 and the other end of the resistor R242 are all grounded, one end of the resistor R239 is connected to the cathode of the diode D203, and the other end of the resistor R239 is connected to the input end of the output module;
a turn-off voltage output branch circuit, which includes a switching tube Q202, a diode D204, a capacitor C252, a capacitor C253, a resistor R256, and a resistor R257, wherein a source of the switching tube Q202 is connected to the processing chip, a drain of the switching tube Q202 is connected to the processing chip, a gate of the switching tube Q202 is connected to a cathode of the diode D204, an anode of the diode D204 is connected to one end of the capacitor C253, one end of the capacitor C252, and one end of the resistor R257, respectively, the other end of the capacitor C253, the other end of the capacitor C252, and the other end of the resistor R257 are all grounded, one end of the resistor R256 is connected to one end of the processing chip and one end of the resistor R257, and the other end of the resistor R256 is connected to an input end of the output module;
the bias voltage output branch comprises a resistor R213 and a resistor R214, one end of the resistor R214 is connected with the processing chip, the other end of the resistor R214 is connected with the input end of the output module, one end of the resistor R213 is connected with one end of the resistor R214, and the other end of the resistor R213 is grounded;
the turn-off voltage output branch circuit further comprises an inductor L207, one end of the inductor L207 is connected with the cathode of the diode D204, and the other end of the inductor L207 is grounded.
2. The TCON driving circuit for an ultra-high definition liquid crystal display panel according to claim 1, wherein the electrostatic protection unit includes a plurality of electrostatic protection tubes DT, in one of the electrostatic protection tubes DT, the 1 st, 2 nd, 4 th and 5 th pins of the electrostatic protection tube DT are connected to the TCON chip, the 6 th, 7 th, 9 th and 10 th pins of the electrostatic protection tube DT are connected to the connection terminal, and the 3 rd and 8 th pins of the electrostatic protection tube DT are grounded.
3. The TCON driving circuit applied to an ultra-high-definition liquid crystal display screen of claim 1, wherein the pixel voltage output branch further comprises a capacitor C269, one end of the capacitor C269 is connected with one end of the capacitor C263, and the other end of the capacitor C269 is grounded.
4. The TCON driving circuit applied to an ultra-high-definition liquid crystal display screen of claim 3, wherein the pixel voltage output branch further comprises a capacitor C270, and the capacitor C270 is connected in parallel with the capacitor C269.
5. The TCON driving circuit for ultra-high-definition liquid crystal display panel according to claim 1, wherein the step-down output branch further comprises a resistor R240 and a capacitor C243, one end of the resistor R240 is connected to the cathode of the diode D202, and the other end of the resistor R240 is connected in series with the capacitor C243 and the anode of the diode D202.
6. The TCON driving circuit for an ultra-high-definition liquid crystal display panel according to claim 1, wherein the turn-on voltage output branch further comprises a capacitor C228, one end of the capacitor C228 is connected to the other end of the resistor R239, and the other end of the capacitor C228 is grounded.
7. The TCON driving circuit applied to an ultra-high-definition liquid crystal display screen of claim 1, wherein the color-level unit comprises a plurality of color-level output branches, and in one color-level output branch, the color-level output branch comprises a color-level resistor and a color-level capacitor, one end of the color-level resistor is connected to the processing chip, the other end of the color-level resistor is connected in series with the color-level capacitor and grounded, and the other end of the color-level resistor is further connected to the input end of the output module.
8. The TCON driving circuit applied to an ultra-high-definition liquid crystal display screen of claim 1, wherein the model of the TCON chip is CSQ 12222-A0N.
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| CN102800287B (en) * | 2012-08-30 | 2015-11-25 | 南京中电熊猫液晶显示科技有限公司 | A kind of control method of gray scale voltage |
| KR102023940B1 (en) * | 2012-12-27 | 2019-11-04 | 엘지디스플레이 주식회사 | Driving circuit of display device and method for driving the same |
| CN104700791A (en) * | 2013-12-09 | 2015-06-10 | 大连鑫永工业制造有限公司 | Electrostatic protection method of LCD (liquid crystal display) |
| KR102339039B1 (en) * | 2014-08-27 | 2021-12-15 | 삼성디스플레이 주식회사 | Display apparatus and method of driving display panel using the same |
| CN104570493B (en) * | 2015-01-22 | 2017-10-31 | 合肥京东方光电科技有限公司 | A kind of array base palte motherboard and preparation method thereof, static elimination equipment |
| KR102465372B1 (en) * | 2015-09-30 | 2022-11-09 | 삼성디스플레이 주식회사 | Timing controller, display apparatus having the same and method of driving the display apparatus |
| CN109254435B (en) * | 2018-11-09 | 2020-06-12 | 惠科股份有限公司 | Electrostatic protection structure and display device |
| CN109509442A (en) * | 2018-11-29 | 2019-03-22 | 惠州高盛达科技有限公司 | The T-CON plate of miniaturization |
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Address after: 516006 4th floor, No. 90, Hechang Third Road, Zhongkai high tech Industrial Development Zone, Huizhou City, Guangdong Province (plant of Caihuang company) Patentee after: Huizhou Goldman Sachs light display technology Co.,Ltd. Address before: 516006 s-17-6, Huizhou Industrial Park, huiao Avenue, Huizhou City, Guangdong Province Patentee before: HUIZHOU GSD SMART-LINK TECHNOLOGY CO.,LTD. |