CN110808016A - TCON drive circuit applied to notebook computer - Google Patents
TCON drive circuit applied to notebook computer Download PDFInfo
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- CN110808016A CN110808016A CN201910899198.4A CN201910899198A CN110808016A CN 110808016 A CN110808016 A CN 110808016A CN 201910899198 A CN201910899198 A CN 201910899198A CN 110808016 A CN110808016 A CN 110808016A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/04—Display protection
Abstract
The TCON drive circuit applied to the notebook computer is provided with the power supply module, the main control module, the storage module, the brightness adjusting module and the output module. In the actual application process, because the output module comprises a plurality of output units, each output unit can input the processed LVDS signals to the display screen, so that the display screen can receive more image information, the imaging definition of the display screen is improved, and the resolution of the display screen is ensured; in addition, the main control module comprises an anti-surge unit, and the anti-surge unit can absorb surge current, so that the circuit is effectively prevented from being damaged by excessive surge current and cannot work normally; and moreover, the brightness adjusting module is arranged, when the display screen needs brightness adjustment, the brightness adjusting module outputs related signals to the display screen, and the display screen automatically adjusts the brightness.
Description
Technical Field
The invention relates to the technical field of driving circuits, in particular to a TCON driving circuit applied to a notebook computer.
Background
At present, a notebook computer, also called a notebook, a portable or a laptop computer, is a personal computer that is small and convenient to carry. The weight of a notebook computer is typically 1-3 kg. The development trend is that the size is smaller and lighter, and the function is stronger and stronger. Like Netbook, also known as Netbook. The main difference between a notebook computer and a PC is its portability. Compared with a desktop computer, the notebook computer has a similar structure, but the advantages of the notebook computer are still very obvious, and the notebook computer has the main advantages of small volume, light weight and convenience in carrying. Generally, portability is the greatest advantage of a notebook compared with a desktop computer, the weight of a common notebook computer is only about 2 kilograms, and the notebook computer can be carried about no matter the notebook computer is used for work or travels, so that the notebook computer is very convenient.
If the notebook computer needs to work, a TCON drive circuit is required to be arranged in the notebook computer, and the TCON drive circuit is used for outputting LVDS signals to a display screen of the notebook computer to help the display screen to image. With the conventional TCON driving circuit, there are several disadvantages as follows. Firstly, the conventional TCON driving circuit generally has three output modules, which results in insufficient LVDS signals input into the display screen, and thus the resolution of the display screen is not high, and the requirement of high definition cannot be met; secondly, the existing TCON driving circuit is not provided with a relevant module therein to absorb the surge current, so that the existing TCON driving circuit may not work normally due to the excessive surge current, and further the processed LVDS signal cannot be stably output to the display screen, so that the display screen can stably image; thirdly, when the display screen needs to be adjusted in brightness, the conventional TCON driving circuit has no way to output a corresponding brightness adjustment signal to the display screen, so that the display screen is changed in brightness adjustment, and the conventional TCON driving circuit is not strong in functionality and has certain limitation.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the TCON drive circuit which can output a plurality of paths of LVDS signals to the display screen, improve the imaging definition of the display screen, ensure the resolution of the display screen, has the anti-surge function, can absorb surge current, prevent the circuit from being damaged by overlarge surge current and from failing to work normally, and can output a brightness adjustment signal to the display screen to adjust the brightness of the display screen, and is applied to the notebook computer.
The purpose of the invention is realized by the following technical scheme:
a TCON driving circuit applied to a notebook computer comprises:
the power supply module comprises an input unit, a power supply chip and a voltage output unit, wherein the power supply chip is respectively connected with the input unit and the voltage output unit, and the input unit is also used for being connected with an external power supply;
the main control module comprises a connecting terminal, an anti-surge unit and a main control chip, wherein the anti-surge unit is respectively connected with the connecting terminal and the main control chip, the connecting terminal is also used for being connected with external equipment, and the main control chip is respectively connected with the power supply chip and the voltage output unit;
the storage module is respectively connected with the connecting terminal and the main control chip;
the brightness adjusting module is respectively connected with the connecting terminal, the storage module and the voltage output unit; and
and the output module comprises a plurality of output units, and each output unit is connected with the main control chip.
In one embodiment, the input unit includes a resistor R151, a resistor R152, an inductor L2, and a diode D3, one end of the resistor R151 is grounded, the other end of the resistor R151 is connected to the power chip, one end of the resistor R152 is connected to the other end of the resistor R151, the other end of the resistor R152 is connected to the power chip, the other end of the resistor R152 is further connected to an external power source, one end of the inductor L2 is connected to the other end of the resistor R152 and the power chip, the other end of the inductor L2 is connected to the anode of the diode D3 and the power chip, and the cathode of the diode D3 is connected to the power chip.
In one embodiment, the input unit further includes a capacitor C132, a capacitor C133, a capacitor C139, a capacitor C146, and a capacitor C147, wherein one end of the capacitor C132, one end of the capacitor C133, one end of the capacitor C139, one end of the capacitor C146, and one end of the capacitor C147 are all connected to the other end of the resistor R152, and the other end of the capacitor C132, the other end of the capacitor C133, the other end of the capacitor C139, the other end of the capacitor C146, and the other end of the capacitor C147 are all grounded.
In one embodiment, the voltage output unit includes:
the first output branch comprises a triode Q1, a resistor R147, a capacitor C125, a resistor R168 and a resistor R194, the source of the triode Q1 is connected with the power chip, the gate of the triode Q1 is respectively connected with one end of the resistor R147 and one end of the capacitor C125, the drain of the triode Q1 is connected in series with the resistor R194 and the brightness adjusting module and the output units respectively, the other end of the resistor R147 is connected with the power chip, and the other end of the capacitor C125 is connected in series with the resistor R168 and grounded;
the second output branch is specifically a resistor R201, one end of the resistor R201 is connected with the power supply chip, and the other end of the resistor R201 is connected with each output unit respectively;
a third output branch, which includes a resistor R125, a resistor R128, a resistor R195, a capacitor C101, a capacitor C102, a capacitor C106, and a switch diode D2, wherein one end of the resistor R128 is connected to the power chip, the other end of the resistor R128 is respectively connected to one end of the resistor R125, one end of the capacitor C101, and one end of the capacitor C102, the other end of the resistor R125, the other end of the capacitor C101, and the other end of the capacitor C102 are all grounded, a pin 3 of the switch diode D2 is connected in series with the capacitor C106 and connected to the power chip, a pin 2 of the switch diode D2 is grounded, a pin 3 of the switch diode D2 is respectively connected to one end of the capacitor C101 and one end of the resistor R195, and the other end of the resistor R195 is respectively connected to each output unit;
the fourth output branch comprises a resistor R133, a resistor R134, a resistor R137 and a capacitor C109, wherein one end of the resistor R133 is connected with the power supply chip and the brightness adjusting module respectively, the other end of the resistor R133 is connected with one end of the resistor R134 and the power supply chip respectively, the other end of the resistor R134 is connected with the resistor R137 in series and is grounded, one end of the capacitor C109 is connected with one end of the resistor R133, and the other end of the capacitor C109 is grounded; and
the fifth output branch comprises a resistor R124, a resistor R192, a resistor R193, a resistor R157, a capacitor C142 and a capacitor C143, one end of the resistor R124 is connected with the power supply chip, the other end of the resistor R124 is sequentially connected with the resistor R192 and the resistor R193 in series, one end of the resistor R192 is connected with each output unit through a brightness adjusting module, one end of the resistor R193 is connected with the main control chip, one end of the resistor R157 is connected with the other end of the resistor R193, one end of the capacitor C142 and one end of the capacitor C143, and the other end of the resistor R157, the other end of the capacitor C142 and the other end of the capacitor C143 are all grounded. 5. The TCON driving circuit applied to the notebook computer according to claim 4, wherein the first output branch further comprises a capacitor C126, a capacitor C127, a capacitor C128, a capacitor C129, a capacitor C136 and a capacitor C137, one end of the capacitor C126, one end of the capacitor C127, one end of the capacitor C128 and one end of the capacitor C129 are all connected to the drain of the transistor Q1, one end of the capacitor C136 and one end of the capacitor C137 are all connected to the source of the transistor Q1, and the other end of the capacitor C126, the other end of the capacitor C127, the other end of the capacitor C128, the other end of the capacitor C129, the other end of the capacitor C136 and the other end of the capacitor C137 are all grounded.
In one embodiment, the fifth output branch further includes a capacitor C104, one end of the capacitor C104 is connected to one end of the resistor R124, and the other end of the capacitor C104 is grounded.
In one embodiment, the anti-surge unit comprises a plurality of voltage stabilizers, wherein in one voltage stabilizer, the 1 st pin and the 3 rd pin of the voltage stabilizer are both connected with the main control chip, the 2 nd pin of the voltage stabilizer is grounded, and the 4 th pin and the 6 th pin of the voltage stabilizer are both connected with the connecting terminal.
In one embodiment, the storage module includes a voltage reducer IC9 and a memory IC3, pins 1 and 5 of the voltage reducer IC9 are respectively connected to the connection terminals, pin 5 of the memory IC3 is respectively connected to pin 6 of the voltage reducer IC9, the main control chip and the brightness adjustment module, and pin 6 of the memory IC3 is respectively connected to pin 2 of the voltage reducer IC9, the main control chip and the brightness adjustment module.
In one embodiment, the brightness adjusting module includes a brightness adjusting chip IC8, a resistor R196, a resistor R197, a resistor R198, a resistor R199, a capacitor C155, and a capacitor C156, the brightness adjusting chip IC8 is connected to the voltage output unit, one end of the resistor R196, one end of the resistor R197, one end of the resistor R198, and one end of the resistor R199 are respectively connected to the brightness adjusting chip IC8, the other end of the resistor R196 is respectively connected to each of the output units, the other end of the resistor R197 is connected in series to the capacitor C155 and is grounded, the other end of the resistor R197 is further connected to the brightness adjusting chip IC8, the other end of the resistor R198 and the other end of the resistor R199 are both grounded, one end of the capacitor C156 is connected to one end of the resistor R199, and the other end of the capacitor C156 is grounded.
In one embodiment, the brightness adjustment module further includes a capacitor C154, one end of the capacitor C154 is connected to the other end of the resistor R196, and the other end of the capacitor C154 is grounded.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the TCON drive circuit applied to the notebook computer is provided with the power supply module, the main control module, the storage module, the brightness adjusting module and the output module. In the actual application process, because the output module comprises a plurality of output units, each output unit can input the processed LVDS signals to the display screen, so that the display screen can receive more image information, the imaging definition of the display screen is improved, and the resolution of the display screen is ensured; in addition, the main control module comprises an anti-surge unit, and the anti-surge unit can absorb surge current, so that the circuit is effectively prevented from being damaged by excessive surge current and cannot work normally; and moreover, the brightness adjusting module is arranged, when the display screen needs brightness adjustment, the brightness adjusting module outputs related signals to the display screen, and the display screen automatically adjusts the brightness.
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 block diagram of a TCON driving circuit applied to a notebook according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of an input unit according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a power chip according to an embodiment of the invention;
FIG. 4 is a schematic circuit diagram of a first output branch according to an embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a second output branch according to an embodiment of the present invention;
FIG. 6 is a schematic circuit diagram of a third output branch according to an embodiment of the present invention;
FIG. 7 is a schematic circuit diagram of a fourth output branch according to an embodiment of the present invention;
FIG. 8 is a schematic circuit diagram of a fifth output branch according to an embodiment of the present invention;
fig. 9 is a schematic circuit diagram of an anti-surge unit according to an embodiment of the present invention;
FIG. 10 is a schematic circuit diagram of a main control chip according to an embodiment of the present invention;
FIG. 11 is a schematic circuit diagram of a memory module according to an embodiment of the invention;
FIG. 12 is a schematic circuit diagram of a brightness adjustment module according to an embodiment of the invention;
fig. 13 is a schematic circuit diagram of a connection terminal according to an embodiment of the present 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 a notebook computer includes a power module 100, a main control module 200, a memory module 300, a brightness adjusting module 400, and an output module 500.
Therefore, it should be noted that the power module 100 plays a role of power supply, processes and outputs the voltage input by the external power source, and supplies power to the subsequent related functional modules; the main control module 200 plays a role of control; the storage module 300 plays a role of storage; the brightness adjustment module 400 plays a role of brightness adjustment; the output module 500 is configured to output the processed LVDS signal to a display screen, so that the display screen performs imaging.
Referring to fig. 1, the power module 100 includes an input unit 110, a power chip 120 and a voltage output unit 130, the power chip 120 is connected to the input unit 110 and the voltage output unit 130, and the input unit 110 is further configured to be connected to an external power source.
Thus, it should be noted that the input unit 110 is used for inputting a voltage; the power chip 120 is configured to perform conversion processing on an input voltage, input the converted voltage into the voltage output unit 130, and the voltage output unit 130 outputs the voltage to a subsequent related function module.
It should be noted that, referring to fig. 3, the power chip may be a chip of model HX5562R11U, and its operation principle is not described in detail and is well known to those skilled in the art.
Referring to fig. 1 and 13, the main control module 200 includes a connection terminal 210, an anti-surge unit 220 and a main control chip 230, the anti-surge unit 220 is connected to the connection terminal 210 and the main control chip 230, the connection terminal 210 is further used for being connected to an external device, and the main control chip 230 is connected to the power chip 120 and the voltage output unit 130.
Thus, it should be noted that the connection terminal 210 plays a role in connection, an LVDS signal of an external device is input into the connection terminal 210, and the connection terminal 210 inputs the LVDS signal into the main control chip 230; the anti-surge unit 220 has an anti-surge function, absorbs excessive surge current, and prevents the circuit from being damaged by the excessive surge current; the main control chip 230 plays a role of control, and the main control chip 230 is also used for processing the LVDS signals input from the connection terminal 210.
It should be noted that, referring to fig. 10, the main control chip 230 may be of CS11103, and its operation principle is not described in detail and is well known to those skilled in the art.
Referring to fig. 1, the memory module 300 is connected to the connection terminal 210 and the main control chip 230, respectively.
Thus, it should be noted that the storage module 300 plays a role of storage.
Referring to fig. 1, the brightness adjusting module 400 is respectively connected to the connection terminal 210, the memory module 300 and the voltage output unit 130.
Therefore, it should be noted that the brightness adjusting module 400 plays a role of adjusting brightness, and when the display screen needs to be adjusted in brightness, the brightness adjusting module 400 outputs a relevant signal to the display screen, so that the display screen automatically adjusts the brightness. Referring to fig. 1, the output module 500 includes a plurality of output units 510, and each output unit 510 is connected to the main control chip 230.
Thus, it should be noted that the output units 510 are all used to input LVDS signals to the display screen, and since the output module 500 includes the output units 510, each output unit 510 can input the processed LVDS signal to the display screen, so that the display screen can receive more image information, the imaging definition of the display screen is improved, and the resolution of the display screen is ensured. In the present application, the output module 500 includes 4 output units 510.
Further, referring to fig. 2, in an embodiment, the input unit 110 includes a resistor R151, a resistor R152, an inductor L2, and a diode D3, one end of the resistor R151 is grounded, the other end of the resistor R151 is connected to the power chip, one end of the resistor R152 is connected to the other end of the resistor R151, the other end of the resistor R152 is connected to the power chip, the other end of the resistor R152 is further connected to an external power source, one end of the inductor L2 is connected to the other end of the resistor R152 and the power chip 120, the other end of the inductor L2 is connected to the anode of the diode D3 and the power chip 120, and the cathode of the diode D3 is connected to the power chip 120.
In this manner, the resistor R151 and the resistor R152 function as voltage division; the inductor L2 plays a role in filtering, and is used for filtering the input voltage and eliminating clutter signals contained in the voltage; the diode D3 plays a role of preventing backflow, preventing voltage from flowing backwards.
In the present application, when a voltage is input to the power supply chip 120, the voltage is input to a plurality of pins of the power supply chip 120.
Further, referring to fig. 2 again, in an embodiment, the input unit 110 further includes a capacitor C132, a capacitor C133, a capacitor C139, a capacitor C146, and a capacitor C147, one end of the capacitor C132, one end of the capacitor C133, one end of the capacitor C139, one end of the capacitor C146, and one end of the capacitor C147 are all connected to the other end of the resistor R152, and the other end of the capacitor C132, the other end of the capacitor C133, the other end of the capacitor C139, the other end of the capacitor C146, and the other end of the capacitor C147 are all grounded.
In this way, the capacitor C132, the capacitor C133, the capacitor C139, the capacitor C146, and the capacitor C147 all function as a filter to eliminate spurious signals of the input voltage.
Further, referring to fig. 4, fig. 5, fig. 6, fig. 7, and fig. 8, in one embodiment, the voltage output unit 130 includes:
the first output branch 131, the first output branch 131 includes a transistor Q1, a resistor R147, a capacitor C125, a resistor R168 and a resistor R194, a source of the transistor Q1 is connected to the power chip 120, a gate of the transistor Q1 is connected to one end of the resistor R147 and one end of the capacitor C125, a drain series resistor R194 of the transistor Q1 is connected to the brightness adjusting module 400 and each output unit 510, the other end of the resistor R147 is connected to the power chip 120, and the other end of the capacitor C125 is connected to the ground through the series resistor R168.
Thus, it should be noted that the transistor Q1 plays a role of a switch, and when the first output branch 131 is required to output voltage, the switching tube Q1 is turned on; the capacitor C125 plays a role of filtering; the resistor R168 is a pull-down resistor, so that the transistor Q1 can work normally. It is emphasized that the output voltage of the first output branch 131 supplies power to the brightness adjusting module 400 and each output unit 510.
The second output branch 132, the second output branch 132 is specifically a resistor R201, one end of the resistor R201 is connected to the power chip 120, and the other end of the resistor R201 is connected to each output unit 510.
Thus, it should be noted that the resistance value of the resistor R201 is 0 Ω, and the resistor R201 functions as a jumper, and when the area of one layer is not enough, the jumper is performed by using the resistor R201 of 0 Ω because the space on the PCB is limited. It is emphasized that the voltage output by the second output branch 132 functions to power the power chip 120.
The third output branch 133 includes a resistor R125, a resistor R128, a resistor R195, a capacitor C101, a capacitor C102, a capacitor C106, and a switch diode D2, one end of the resistor R128 is connected to the power chip, the other end of the resistor R128 is connected to one end of the resistor R125, one end of the capacitor C101, and one end of the capacitor C102, the other end of the resistor R125, the other end of the capacitor C101, and the other end of the capacitor C102 are all grounded, the 3 rd pin of the switch diode D2 is connected to the power chip in series with the capacitor C106, the 2 nd pin of the switch diode D2 is grounded, the 3 rd pin of the switch diode D2 is connected to one end of the capacitor C101 and one end of the resistor R195, and the other end of the resistor R195 is connected to each output unit 510.
Thus, it should be noted that the resistor R125 and the resistor R128 function as voltage division; the resistor R195 also plays a role of a jumper wire, so that the space utilization rate of the PCB is improved; the capacitor C101 and the capacitor C102 both play a role in filtering; the switch diode D2 and the capacitor C106 form a filter network to filter the output voltage and eliminate the noise wave. It is emphasized that the voltage output by the third output branch 133 powers each output cell 510.
The fourth output branch 134, the fourth output branch 134 includes a resistor R133, a resistor R134, a resistor R137, and a capacitor C109, one end of the resistor R133 is connected to the power chip 120 and the brightness adjusting module 400, the other end of the resistor R133 is connected to one end of the resistor R134 and the power chip 120, the other end of the resistor R134 is connected to the ground in series with the resistor R137, one end of the capacitor C109 is connected to one end of the resistor R133, and the other end of the capacitor C109 is connected to the ground.
In this way, the resistor R133, the resistor R134, and the resistor R137 all function as voltage division; the capacitor C109 is used for filtering and eliminating clutter signals.
The fifth output branch 135 includes a resistor R124, a resistor R192, a resistor R193, a resistor R157, a capacitor C142, and a capacitor C143, one end of the resistor R124 is connected to the power chip 120, the other end of the resistor R124 is sequentially connected in series to the resistor R192 and the resistor R193, one end of the resistor R192 is connected to the brightness adjusting module 400 and each output unit 510, one end of the resistor R193 is connected to the main control chip 230, one end of the resistor R157 is connected to the other end of the resistor R193, one end of the capacitor C142, and one end of the capacitor C143, and the other end of the resistor R157, the other end of the capacitor C142, and the other end of the capacitor C143 are all grounded.
Thus, it should be noted that the resistor R124 and the resistor R192 are both jumper resistors with a resistance value of 0 Ω; the resistor R193 and the resistor R157 both play a role of voltage division; the capacitor C142 and the capacitor C143 both function as a filter. It is emphasized that the voltage output by the fifth output branch 135 supplies the brightness adjusting module 400 and each output unit 510.
It should be further noted that the voltage output unit 130 includes 5 output branches, and all of the 5 output branches can output voltage to supply power to the related functional modules.
Further, referring to fig. 4 again, in an embodiment, the first output branch 131 further includes a capacitor C126, a capacitor C127, a capacitor C128, a capacitor C129, a capacitor C136, and a capacitor C137, wherein one end of the capacitor C126, one end of the capacitor C127, one end of the capacitor C128, and one end of the capacitor C129 are all connected to the drain of the transistor Q1, one end of the capacitor C136 and one end of the capacitor C137 are all connected to the source of the transistor Q1, and the other end of the capacitor C126, the other end of the capacitor C127, the other end of the capacitor C128, the other end of the capacitor C129, the other end of the capacitor C136, and the other end of the capacitor C137 are all grounded.
In this way, the capacitor C126, the capacitor C127, the capacitor C128, the capacitor C129, the capacitor C136, and the capacitor C137 all function as a filter to eliminate noise.
Further, referring to fig. 8, in an embodiment, the fifth output branch 135 further includes a capacitor C104, one end of the capacitor C104 is connected to one end of the resistor R124, and the other end of the capacitor C104 is grounded.
Thus, it should be noted that the capacitor C104 also functions as a filter.
Further, referring to fig. 9, in an embodiment, the anti-surge unit 220 includes a plurality of voltage regulators, in one voltage regulator, the 1 st pin and the 3 rd pin of the voltage regulator are both connected to the main control chip 230, the 2 nd pin of the voltage regulator is grounded, and the 4 th pin and the 6 th pin of the voltage regulator are both connected to the connection terminal 210.
Therefore, it should be noted that the voltage regulators all play a role in absorbing the surge current to prevent the circuit from being damaged by the excessive surge current. It should be emphasized that, in the present application, the anti-surge unit 220 includes 3 voltage regulators, namely, a voltage regulator D7, a voltage regulator D8, and a voltage regulator D9, in the present application, the 1 st pin and the 3 rd pin of the voltage regulators D7, D8, and D9 are all connected to the main control chip 230, the 2 nd pins of the voltage regulators D7, D8, and D9 are grounded, and the 4 th pins of the voltage regulators D7, D8, and D9 are all connected to the connection terminal 210; the reason why the pins 6 of the voltage regulators D7 and D8 are connected to the connection terminal 210 and the pin 6 of the voltage regulator D9 is left vacant is that in the present application, the output module 500 includes 4 output cells 510, and it is not necessary to excessively input LVDS signals according to the number of the output cells 510, so that the pin 6 of the voltage regulator D9 is left vacant, that is, the pin connection state of the voltage regulator is flexibly set according to actual situations.
Further, referring to fig. 11, in an embodiment, the memory module 300 includes a voltage reducer IC9 and a memory IC3, a pin 1 and a pin 5 of the voltage reducer IC9 are respectively connected to the connection terminal 210, a pin 5 of the memory IC3 is respectively connected to a pin 6 of the voltage reducer IC9, the main control chip and the brightness adjustment module 400, and a pin 6 of the memory IC3 is respectively connected to a pin 2 of the voltage reducer IC9, the main control chip 230 and the brightness adjustment module 400.
Thus, it should be noted that the voltage reducer IC9 functions to reduce the voltage and input the signal, and the voltage reducer IC9 reduces the voltage to the voltage required by the memory IC3, and also transmits the input signal obtained from the connection terminal 210 to the memory IC 3; the memory IC3 functions as a storage device, and is called from the memory IC3 when the master control chip 230 needs to call related information.
Further, referring to fig. 12, in an embodiment, the luminance adjusting module 400 includes a luminance adjusting chip IC8, a resistor R196, a resistor R197, a resistor R198, a resistor R199, a capacitor C155, and a capacitor C156, the luminance adjusting chip IC8 is connected to the voltage output unit 130, one end of the resistor R196, one end of the resistor R197, one end of the resistor R198, and one end of the resistor R199 are respectively connected to the luminance adjusting chip IC8, the other end of the resistor R196 is respectively connected to each output unit 510, the other end of the resistor R197 is connected in series to the capacitor C155 and is grounded, the other end of the resistor R197 is further connected to the luminance adjusting chip IC8, the other end of the resistor R198 and the other end of the resistor R199 are both grounded, one end of the capacitor C156 is connected to one end of the resistor R199, and the other end of the capacitor.
Thus, it should be noted that the model of the brightness adjusting chip IC8 may be IML1991ID, and the working principle thereof is not described in detail and is well known to those skilled in the art; the resistor R196, the resistor R197, the resistor R198 and the resistor R199 all have the function of voltage division, and the divided voltage is input to each output unit 510 for power supply; the capacitor C155 and the capacitor C156 both play a role of filtering and eliminate noise.
Further, referring to fig. 12 again, in an embodiment, the brightness adjustment module 400 further includes a capacitor C154, one end of the capacitor C154 is connected to the other end of the resistor R196, and the other end of the capacitor C154 is grounded.
Thus, it should be noted that the capacitor C154 functions as a filter.
The TCON drive circuit applied to the notebook computer is provided with the power supply module, the main control module, the storage module, the brightness adjusting module and the output module. In the actual application process, because the output module comprises a plurality of output units, each output unit can input the processed LVDS signals to the display screen, so that the display screen can receive more image information, the imaging definition of the display screen is improved, and the resolution of the display screen is ensured; in addition, the main control module comprises an anti-surge unit, and the anti-surge unit can absorb surge current, so that the circuit is effectively prevented from being damaged by excessive surge current and cannot work normally; and moreover, the brightness adjusting module is arranged, when the display screen needs brightness adjustment, the brightness adjusting module outputs related signals to the display screen, and the display screen automatically adjusts the brightness.
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 (10)
1. A TCON driving circuit applied to a notebook computer is characterized by comprising:
the power supply module comprises an input unit, a power supply chip and a voltage output unit, wherein the power supply chip is respectively connected with the input unit and the voltage output unit, and the input unit is also used for being connected with an external power supply;
the main control module comprises a connecting terminal, an anti-surge unit and a main control chip, wherein the anti-surge unit is respectively connected with the connecting terminal and the main control chip, the connecting terminal is also used for being connected with external equipment, and the main control chip is respectively connected with the power supply chip and the voltage output unit;
the storage module is respectively connected with the connecting terminal and the main control chip;
the brightness adjusting module is respectively connected with the connecting terminal, the storage module and the voltage output unit; and
and the output module comprises a plurality of output units, and each output unit is connected with the main control chip.
2. The TCON driving circuit applied to a notebook computer according to claim 1, wherein the input unit comprises a resistor R151, a resistor R152, an inductor L2 and a diode D3, one end of the resistor R151 is connected to ground, the other end of the resistor R151 is connected to the power chip, one end of the resistor R152 is connected to the other end of the resistor R151, the other end of the resistor R152 is connected to the power chip, the other end of the resistor R152 is further connected to an external power source, one end of the inductor L2 is connected to the other end of the resistor R152 and the power chip, the other end of the inductor L2 is connected to the anode of the diode D3 and the power chip, and the cathode of the diode D3 is connected to the power chip.
3. The TCON driving circuit applied to a notebook computer according to claim 2, wherein the input unit further comprises a capacitor C132, a capacitor C133, a capacitor C139, a capacitor C146 and a capacitor C147, one end of the capacitor C132, one end of the capacitor C133, one end of the capacitor C139, one end of the capacitor C146 and one end of the capacitor C147 are all connected to the other end of the resistor R152, and the other end of the capacitor C132, the other end of the capacitor C133, the other end of the capacitor C139, the other end of the capacitor C146 and the other end of the capacitor C147 are all grounded.
4. The TCON driving circuit for notebook computer according to claim 1, wherein the voltage output unit comprises:
the first output branch comprises a triode Q1, a resistor R147, a capacitor C125, a resistor R168 and a resistor R194, the source of the triode Q1 is connected with the power chip, the gate of the triode Q1 is respectively connected with one end of the resistor R147 and one end of the capacitor C125, the drain of the triode Q1 is connected in series with the resistor R194 and the brightness adjusting module and the output units respectively, the other end of the resistor R147 is connected with the power chip, and the other end of the capacitor C125 is connected in series with the resistor R168 and grounded;
the second output branch is specifically a resistor R201, one end of the resistor R201 is connected with the power supply chip, and the other end of the resistor R201 is connected with each output unit respectively;
a third output branch, which includes a resistor R125, a resistor R128, a resistor R195, a capacitor C101, a capacitor C102, a capacitor C106, and a switch diode D2, wherein one end of the resistor R128 is connected to the power chip, the other end of the resistor R128 is respectively connected to one end of the resistor R125, one end of the capacitor C101, and one end of the capacitor C102, the other end of the resistor R125, the other end of the capacitor C101, and the other end of the capacitor C102 are all grounded, a pin 3 of the switch diode D2 is connected in series with the capacitor C106 and connected to the power chip, a pin 2 of the switch diode D2 is grounded, a pin 3 of the switch diode D2 is respectively connected to one end of the capacitor C101 and one end of the resistor R195, and the other end of the resistor R195 is respectively connected to each output unit;
the fourth output branch comprises a resistor R133, a resistor R134, a resistor R137 and a capacitor C109, wherein one end of the resistor R133 is connected with the power supply chip and the brightness adjusting module respectively, the other end of the resistor R133 is connected with one end of the resistor R134 and the power supply chip respectively, the other end of the resistor R134 is connected with the resistor R137 in series and is grounded, one end of the capacitor C109 is connected with one end of the resistor R133, and the other end of the capacitor C109 is grounded; and
the fifth output branch comprises a resistor R124, a resistor R192, a resistor R193, a resistor R157, a capacitor C142 and a capacitor C143, one end of the resistor R124 is connected with the power supply chip, the other end of the resistor R124 is sequentially connected with the resistor R192 and the resistor R193 in series, one end of the resistor R192 is connected with each output unit through a brightness adjusting module, one end of the resistor R193 is connected with the main control chip, one end of the resistor R157 is connected with the other end of the resistor R193, one end of the capacitor C142 and one end of the capacitor C143, and the other end of the resistor R157, the other end of the capacitor C142 and the other end of the capacitor C143 are all grounded.
5. The TCON driving circuit applied to the notebook computer according to claim 4, wherein the first output branch further comprises a capacitor C126, a capacitor C127, a capacitor C128, a capacitor C129, a capacitor C136 and a capacitor C137, one end of the capacitor C126, one end of the capacitor C127, one end of the capacitor C128 and one end of the capacitor C129 are all connected to the drain of the transistor Q1, one end of the capacitor C136 and one end of the capacitor C137 are all connected to the source of the transistor Q1, and the other end of the capacitor C126, the other end of the capacitor C127, the other end of the capacitor C128, the other end of the capacitor C129, the other end of the capacitor C136 and the other end of the capacitor C137 are all grounded.
6. The TCON driving circuit applied to the notebook computer according to claim 4, wherein the fifth output branch further comprises a capacitor C104, one end of the capacitor C104 is connected to one end of the resistor R124, and the other end of the capacitor C104 is grounded.
7. The TCON driving circuit applied to the notebook computer according to claim 1, wherein the anti-surge unit comprises a plurality of voltage regulators, in one of the voltage regulators, pins 1 and 3 of the voltage regulator are both connected to the main control chip, pin 2 of the voltage regulator is grounded, and pins 4 and 6 of the voltage regulator are both connected to the connection terminal.
8. The TCON driving circuit applied to a notebook computer according to claim 1, wherein the storage module comprises a voltage reducer IC9 and a memory IC3, a 1 st pin and a 5 th pin of the voltage reducer IC9 are respectively connected to the connection terminals, a 5 th pin of the memory IC3 is respectively connected to a 6 th pin of the voltage reducer IC9, the main control chip and the brightness adjusting module, and a 6 th pin of the memory IC3 is respectively connected to a 2 nd pin of the voltage reducer IC9, the main control chip and the brightness adjusting module.
9. The TCON driving circuit applied to notebook computer according to claim 1, the brightness adjusting module comprises a brightness adjusting chip IC8, a resistor R196, a resistor R197, a resistor R198, a resistor R199, a capacitor C155 and a capacitor C156, the brightness adjusting chip IC8 is connected to the voltage output unit, one end of the resistor R196, one end of the resistor R197, one end of the resistor R198, and one end of the resistor R199 are connected to the brightness adjusting chip IC8, the other end of the resistor R196 is respectively connected with each output unit, the other end of the resistor R197 is connected with the capacitor C155 in series and grounded, the other end of the resistor R197 is further connected to the brightness adjusting chip IC8, the other end of the resistor R198 and the other end of the resistor R199 are both grounded, one end of the capacitor C156 is connected to one end of the resistor R199, and the other end of the capacitor C156 is grounded.
10. The TCON driving circuit applied to a notebook computer according to claim 9, wherein the brightness adjusting module further comprises a capacitor C154, one end of the capacitor C154 is connected to the other end of the resistor R196, and the other end of the capacitor C154 is grounded.
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| CN201910899198.4A CN110808016A (en) | 2019-09-23 | 2019-09-23 | TCON drive circuit applied to notebook computer |
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| CN201910899198.4A CN110808016A (en) | 2019-09-23 | 2019-09-23 | TCON drive circuit applied to notebook computer |
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Effective date of registration: 20210707 Address after: 516006 s-17-6, Huizhou Industrial Park, huiao Avenue, Huizhou City, Guangdong Province Applicant after: HUIZHOU GSD SMART-LINK TECHNOLOGY Co.,Ltd. Address before: 516006 No.2, Huaxing Road, Zhongkai high tech Zone, Huizhou City, Guangdong Province Applicant before: HUIZHOU GAOSHENGDA TECHNOLOGY Co.,Ltd. |
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