CN114743517B - Common voltage supply circuit and display device - Google Patents
Common voltage supply circuit and display device Download PDFInfo
- Publication number
- CN114743517B CN114743517B CN202210419924.XA CN202210419924A CN114743517B CN 114743517 B CN114743517 B CN 114743517B CN 202210419924 A CN202210419924 A CN 202210419924A CN 114743517 B CN114743517 B CN 114743517B
- Authority
- CN
- China
- Prior art keywords
- voltage dividing
- voltage
- dividing resistor
- electrically connected
- display panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 abstract description 26
- 238000010586 diagram Methods 0.000 description 16
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The common voltage supply circuit and the display device provided by the embodiment of the application comprise an output module and a voltage division module. The voltage dividing module can generate multiple paths of public voltages according to the preset voltage output by the output module so as to meet the requirements of the existing display panel. In addition, the multi-channel public voltage output by the voltage dividing module is sequentially reduced according to a preset value, and the preset value is 0.08 to 0.11 volt, so that the requirement of production of the display panel can be met, and the display panel can be produced in a large scale.
Description
Technical Field
The application relates to the technical field of display, in particular to a public voltage supply circuit and a display device.
Background
At present, with the vigorous development of the age of liquid crystal display screens, the requirements of the market on the quality and taste of the display screens, the screen size, the appearance and the visual angle are more and more strict, and the liquid crystal screens which are ultra-large, narrow in frame and wide in visual angle and can display excellent image quality are sequentially pushed out. The market prospect of flat panel display is wide, and the display technology is promoted increasingly, such as optimization and innovation of in-plane architecture, driving and power supply and the like. The changes in the size and in-plane architecture of the display screen, etc., have led to an increase in the variety of requirements for COM voltages required inside the panel to meet the image quality requirements.
The driving system of the lcd includes a common electrode supply circuit, and the common electrode supply circuit in the conventional driving system is generally configured to only supply a common voltage (Vcom), which cannot meet the requirements of the conventional display panel.
Therefore, how to provide a common electrode providing circuit that can output a plurality of common voltages simultaneously is a difficulty that the existing panel manufacturers need to struggle with.
Disclosure of Invention
The embodiment of the application aims to provide a common electrode providing circuit and a display device, which can solve the technical problem that the conventional common electrode providing circuit cannot output a plurality of common voltages at the same time.
The embodiment of the application provides a public voltage supply circuit, which comprises an output module and a voltage dividing module; wherein,,
the output module is electrically connected with the voltage dividing module and is used for outputting preset voltage according to external signals;
the voltage division module is electrically connected to the display panel, and is used for generating multiple paths of public voltages according to the preset voltage, outputting the multiple paths of public voltages to the display panel, and sequentially reducing the multiple paths of public voltages according to the preset value, wherein the preset value is 0.08-0.11V.
In the common voltage supply circuit of the present application, the output module is further electrically connected to the display panel, and the output module is configured to supply a first common voltage to the display panel.
In the common voltage supply circuit of the present application, the voltage dividing module includes a first voltage dividing unit, a second voltage dividing unit, a third voltage dividing unit, and a fourth voltage dividing unit; wherein,,
the first voltage dividing unit is electrically connected to the grounding end, the output module and the display panel, the first voltage dividing unit is used for providing a second public voltage for the display panel, the second voltage dividing unit is electrically connected to the grounding end, the output module and the display panel, the second voltage dividing unit is used for providing a third public voltage for the display panel, the third voltage dividing unit is electrically connected to the grounding end, the output module and the display panel, the third voltage dividing unit is used for providing a fourth public voltage for the display panel, the fourth voltage dividing unit is electrically connected to the grounding end, the output module and the display panel, and the fourth voltage dividing unit is used for providing a fifth public voltage for the display panel.
In the common voltage supply circuit of the present application, the first voltage dividing unit includes a first voltage dividing resistor and a second voltage dividing resistor, one end of the first voltage dividing resistor is electrically connected to the ground terminal, the other end of the first voltage dividing resistor is electrically connected to the display panel, and is electrically connected to one end of the second voltage dividing resistor, and the other end of the second voltage dividing resistor is electrically connected to the output module;
the second voltage dividing unit comprises a first voltage dividing resistor and a third voltage dividing resistor, one end of the first voltage dividing resistor is electrically connected with the grounding end, the other end of the first voltage dividing resistor is electrically connected with the display panel and is electrically connected with one end of the third voltage dividing resistor, and the other end of the third voltage dividing resistor is electrically connected with the output module;
the third voltage dividing unit comprises a first voltage dividing resistor and a fourth voltage dividing resistor, one end of the first voltage dividing resistor is electrically connected with the grounding end, the other end of the first voltage dividing resistor is electrically connected with the display panel and is electrically connected with one end of the fourth voltage dividing resistor, and the other end of the fourth voltage dividing resistor is electrically connected with the output module;
the fourth voltage dividing unit comprises a first voltage dividing resistor and a fifth voltage dividing resistor, one end of the first voltage dividing resistor is electrically connected with the grounding end, the other end of the first voltage dividing resistor is electrically connected with the display panel and is electrically connected with one end of the fifth voltage dividing resistor, and the other end of the fifth voltage dividing resistor is electrically connected with the output module.
In the common voltage supply circuit of the present application, the resistance of the first voltage dividing resistor is 990 to 1010 ohms, the resistance of the second voltage dividing resistor is 12 to 14 ohms, the resistance of the third voltage dividing resistor is 29 to 31 ohms, the resistance of the fourth voltage dividing resistor is 42 to 44 ohms, and the resistance of the fifth voltage dividing resistor is 55 to 57 ohms.
In the common voltage supply circuit of the present application, the voltage dividing module includes a fifth voltage dividing unit, a sixth voltage dividing unit, a seventh voltage dividing unit, and an eighth voltage dividing unit; wherein,,
the fifth voltage dividing unit is electrically connected to the ground terminal, the output module and the display panel, the fifth voltage dividing unit is configured to provide the second common voltage to the display panel, the sixth voltage dividing unit is electrically connected to the ground terminal, the output module and the display panel, the sixth voltage dividing unit is configured to provide the third common voltage to the display panel, the seventh voltage dividing unit is electrically connected to the ground terminal, the sixth voltage dividing unit and the display panel, the seventh voltage dividing unit is configured to provide the fourth common voltage to the display panel, the eighth voltage dividing unit is electrically connected to the ground terminal, the seventh voltage dividing unit and the display panel, and the eighth voltage dividing unit is configured to provide the fifth common voltage to the display panel.
In the common voltage supply circuit of the present application, the fifth voltage dividing unit includes the sixth voltage dividing resistor and a seventh voltage dividing resistor, one end of the sixth voltage dividing resistor is electrically connected to the ground terminal, the other end of the sixth voltage dividing resistor is electrically connected to the display panel and is electrically connected to one end of the seventh voltage dividing resistor, and the other end of the seventh voltage dividing resistor is electrically connected to the output module;
the sixth voltage dividing unit comprises a sixth voltage dividing resistor and an eighth voltage dividing resistor, one end of the sixth voltage dividing resistor is electrically connected with the grounding end, the other end of the sixth voltage dividing resistor is electrically connected with the display panel and is electrically connected with the first end of the eighth voltage dividing resistor, and the second end of the eighth voltage dividing resistor is electrically connected with the output module;
the seventh voltage dividing unit comprises a sixth voltage dividing resistor and a ninth voltage dividing resistor, one end of the sixth voltage dividing resistor is electrically connected to the grounding end, the other end of the sixth voltage dividing resistor is electrically connected to the display panel and is electrically connected to the first end of the ninth voltage dividing resistor, and the second end of the ninth voltage dividing resistor is electrically connected to the first end of the eighth voltage dividing resistor;
the eighth voltage dividing unit comprises a sixth voltage dividing resistor and a tenth voltage dividing resistor, one end of the sixth voltage dividing resistor is electrically connected to the grounding end, the other end of the sixth voltage dividing resistor is electrically connected to the display panel and is electrically connected to one end of the tenth voltage dividing resistor, and the other end of the tenth voltage dividing resistor is electrically connected to the first end of the ninth voltage dividing resistor.
In the common voltage supply circuit of the present application, the resistance of the sixth voltage dividing resistor is 990 to 1010 ohms, the resistance of the seventh voltage dividing resistor is 12 to 14 ohms, the resistance of the eighth voltage dividing resistor is 49 to 51 ohms, the resistance of the ninth voltage dividing resistor is 14 to 16 ohms, and the resistance of the tenth voltage dividing resistor is 14 to 16 ohms.
In the common voltage supply circuit of the present application, the common voltage supply circuit further includes an amplifying module, the amplifying module is electrically connected to the voltage dividing module and the display panel, and the amplifying module is configured to amplify the common voltage so that the common voltage meets the display panel requirement.
The embodiment of the application also provides a display device, which comprises a display panel and a driving chip connected with the display panel; the public voltage supply circuit is arranged on the driving chip.
The common voltage supply circuit and the display device provided by the embodiment of the application comprise an output module and a voltage division module. The voltage dividing module can generate multiple paths of public voltages according to the preset voltage output by the output module so as to meet the requirements of the existing display panel. In addition, the multi-channel public voltage output by the voltage dividing module is sequentially reduced according to a preset value, and the preset value is 0.08 to 0.11 volt, so that the requirement of production of the display panel can be met, and the display panel can be produced in a large scale.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a first implementation of a common voltage supply circuit according to an embodiment of the present application.
Fig. 2 is a first schematic diagram of a second implementation of the common voltage supply circuit according to an embodiment of the present application.
Fig. 3 is a second schematic diagram of a second implementation of the common voltage supply circuit according to an embodiment of the present application.
Fig. 4 is a schematic diagram of a first circuit of a voltage dividing module according to an embodiment of the application.
Fig. 5 is a schematic diagram of a third configuration of a second implementation of the common voltage supply circuit according to an embodiment of the present application.
Fig. 6 is a second circuit schematic diagram of the voltage dividing module according to an embodiment of the application.
Fig. 7 is a schematic structural diagram of a third implementation of the common voltage supply circuit according to the embodiment of the present application.
Fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
Referring to fig. 1, fig. 1 is a schematic diagram of a first embodiment of a common voltage supply circuit according to the prior art. As shown in fig. 1, the common voltage supply circuit 10 provided in the embodiment of the present application includes an output module 101 and a voltage dividing module 102. The output module 101 is electrically connected to the voltage dividing module 102; the voltage dividing module 102 is electrically connected to the display panel.
The output module 101 is configured to output a preset voltage V according to an external signal. The voltage dividing module 102 is configured to generate multiple common voltages Vcom according to the preset voltage V, and output the multiple common voltages Vcom to the display panel. And the plurality of common voltages Vcom sequentially decrease according to a preset value.
It should be noted that the voltage dividing module can generate multiple common voltages Vcom according to the preset voltage V to meet the requirement of the existing display panel. In addition, the multiple paths of public voltages Vcom output by the voltage dividing module are sequentially reduced according to a preset value, and the preset value is 0.08 to 0.11 volt, so that the multiple paths of public voltages Vcom can meet the production requirement of the display panel, and the display panel can be conveniently produced in a large scale.
Wherein the preset value is 0.08 to 0.11 volts. Specifically, the preset value is 0.08 volts, 0.09 volts, 0.10 volts, or 0.11 volts. It should be noted that the specific value of the preset value is determined by the requirement in the production process of the display panel.
Referring to fig. 2, fig. 2 is a first schematic diagram of a second implementation of the common voltage supply circuit according to the embodiment of the present application, as shown in fig. 2, the common voltage supply circuit 10 shown in fig. 2 is different from the common voltage supply circuit 10 shown in fig. 1 in that: the output module 101 in the common voltage supply circuit 10 provided in the embodiment of the application is further electrically connected to the display panel.
The output module 101 is further configured to provide the first common voltage Vcom1 to the display panel.
It should be noted that, first, the number of common voltage outputs can be increased by directly providing the first common voltage Vcom1 to the display panel by using the output module 101, which helps to meet the requirement of the display panel with higher performance. Secondly, the output module 101 is adopted to directly provide the first common voltage Vcom1 for the display panel, so that the first common voltage Vcom1 can be conveniently regulated, and the mass production efficiency of the display panel can be improved. Third, the output module 101 is used to directly supply the first common voltage Vcom1 to the display panel, so that the voltage dividing module is not needed, and the production cost of the display panel can be reduced.
Referring to fig. 3, fig. 3 is a second structural schematic diagram of a second embodiment of a display panel according to an embodiment of the application. As shown in fig. 3, the common voltage supply circuit 10 shown in fig. 3 is different from the common voltage supply circuit 10 described in fig. 2 in that: the voltage division module 102 includes a first voltage division unit 1021, a second voltage division unit 1022, a third voltage division unit 1023, and a fourth voltage division unit 1024.
The first voltage dividing unit 1021 is electrically connected to the ground GND, the output module 101 and the display panel. The second voltage division unit 1022 is electrically connected to the ground GND, the output module 101, and the display panel. The third voltage dividing unit 1023 is electrically connected to the ground GND, the output module 101 and the display panel. The fourth voltage dividing unit 1024 is electrically connected to the ground GND, the output module 101, and the display panel.
Note that the first voltage dividing unit 1021 is configured to supply the second common voltage Vcom2 to the display panel. The second voltage division unit 1022 is used to supply the third common voltage Vcom3 to the display panel. The third voltage division unit 1023 is used to supply the fourth common voltage Vcom4 to the display panel. The fourth voltage dividing unit 1024 is used to supply the fifth common voltage Vcom5 to the display panel.
Note that the first common voltage Vcom1, the second common voltage Vcom2, the third common voltage Vcom3, the fourth common voltage Vcom4, and the fifth common voltage Vcom5 are sequentially lowered according to a preset value. The preset value is 0.08 to 0.11 volts.
It should be noted that, the common voltage providing circuit 10 according to the embodiment of the present application calculates the maximum common voltage required in the display panel. Then, the value of the first common voltage Vcom1 outputted from the adjustment output module 101 to the display panel is consistent with the value of the maximum common voltage required in the display panel. Then, the first voltage division unit 1022 is used to divide the first common voltage Vcom1 into a second common voltage Vcom2; dividing the first common voltage Vcom1 into a third common voltage Vcom3 by using the second dividing unit 1023; dividing the first common voltage Vcom1 by a third division unit 1023 to form a fourth common voltage Vcom4; the fourth voltage division unit 1024 divides the first common voltage Vcom1 to form a fifth common voltage Vcom5.
It should be noted that the first common voltage Vcom1 is adopted to divide the second common voltage Vcom2, the third common voltage Vcom3, the fourth common voltage Vcom4, and the fifth common voltage Vcom5 in sequence, so as to meet the requirement of the existing display panel. The first, second, third, fourth and fifth common voltages Vcom1, vcom2, vcom3, vcom4 and Vcom5 are sequentially lowered by a preset value. The preset value is 0.08 to 0.11 volts, so that the display panel can meet the production requirement of the display panel, and the display panel is convenient to produce in a large scale.
Note that, the voltage value of the first common voltage Vcom1 is 6.489 v to 7.622 v. Specifically, the voltage value of the first common voltage Vcom1 is 6.489 volts, 6.592 volts, 6.695 volts, 6.798 volts, 6.901 volts, 7.004 volts, 7.107 volts, 7.210 volts, 7.313 volts, 7.416 volts, 7.519 volts, or 7.622 volts. The specific voltage value of the first common voltage Vcom1 is determined by the specific requirements of the display panel production.
It should be noted that, the voltage value of the second common voltage Vcom2 is 6.406 v to 7.524 v. Specifically, the voltage value of the first common voltage Vcom1 is 6.406 volts, 6.507 volts, 6.609 volts, 6.711 volts, 6.812 volts, 6.914 volts, 7.016 volts, 7.117 volts, 7.219 volts, 7.321 volts, 7.423 volts, or 7.524 volts. The specific voltage value of the second common voltage Vcom2 is determined by the specific requirements of the display panel production.
The voltage value of the third common voltage Vcom3 is 6.300 v to 7.400 v, and the voltage value of the third common voltage Vcom3 is 6.300 v, 6.400 v, 6.500 v, 6.600 v, 6.700 v, 6.800 v, 6.900 v, 7.000 v, 7.100 v, 7.200 v, 7.300 v, 7.400 v. The specific voltage value of the third common voltage Vcom3 is determined by the specific requirements of the display panel production.
The voltage value of the fourth common voltage Vcom4 is 6.221 v to 7.308 v, and the voltage value of the third common voltage Vcom3 is 6.221 v, 6.320 v, 6.419 v, 6.518 v, 6.616 v, 6.715 v, 6.814 v, 6.913 v, 7.012 v, 7.110 v, 7.209 v, 7.308 v. The specific voltage value of the fourth common voltage Vcom4 is determined by the specific requirements of the display panel production.
The voltage value of the fifth common voltage Vcom5 is 6.145 v to 7.218 v, and the voltage value of the third common voltage Vcom3 is 6.145 v, 6.242 v, 6.340 v, 6.438 v, 6.535 v, 6.633 v, 6.730 v, 6.828 v, 6.925 v, 7.023 v, 7.120 v, 7.218 v. The specific voltage value of the fifth common voltage Vcom5 is determined by the specific requirements of the display panel production.
Referring to fig. 4, fig. 4 is a schematic diagram of a first circuit of a voltage dividing module according to an embodiment of the application. As shown in fig. 4, the first voltage dividing unit 1021 includes a first voltage dividing resistor R1 and a second voltage dividing resistor R2. One end of the first voltage dividing resistor R1 is electrically connected to the ground GND, the other end of the first voltage dividing resistor R1 is electrically connected to the display panel, and is electrically connected to one end of the second voltage dividing resistor R2, and the other end of the second voltage dividing resistor R2 is electrically connected to the output module 101.
The second voltage dividing unit 1022 includes a first voltage dividing resistor R1 and a third voltage dividing resistor R3.
One end of the first voltage dividing resistor R1 is electrically connected to the ground GND, the other end of the first voltage dividing resistor R1 is electrically connected to the display panel, and is electrically connected to one end of the third voltage dividing resistor R3, and the other end of the third voltage dividing resistor R3 is electrically connected to the output module 101.
The third voltage dividing unit 1023 includes a first voltage dividing resistor R1 and a fourth voltage dividing resistor R4.
One end of the first voltage dividing resistor R1 is electrically connected to the ground GND, the other end of the first voltage dividing resistor R1 is electrically connected to the display panel, and is electrically connected to one end of the fourth voltage dividing resistor R4, and the other end of the fourth voltage dividing resistor R4 is electrically connected to the output module 101.
The fourth voltage dividing unit includes a first voltage dividing resistor R1 and a fifth voltage dividing resistor R5, one end of the first voltage dividing resistor R1 is electrically connected to the ground GND, the other end of the first voltage dividing resistor R1 is electrically connected to the display panel, and is electrically connected to one end of the fifth voltage dividing resistor R5, and the other end of the fifth voltage dividing resistor R5 is electrically connected to the output module 101.
It should be noted that the resistance of the first voltage dividing resistor R1 is far greater than the resistance of the second voltage dividing resistor R2, the resistance of the third voltage dividing resistor R3, the resistance of the fourth voltage dividing resistor R4, and the resistance of the fifth voltage dividing resistor R5.
The resistance value of the first voltage dividing resistor R1 is 990 ohm to 1010 ohm. Specifically, the resistance value of the first voltage dividing resistor R1 is 990 ohms, 992 ohms, 994 ohms, 997 ohms, 1000 ohms, 1005 ohms, or 1010 ohms. The specific resistance of the first voltage dividing resistor R1 is determined by the specific requirement of the display panel production line.
Wherein, the resistance value of the second voltage dividing resistor R2 is 12 ohm to 14 ohm. Specifically, the resistance value of the second voltage dividing resistor R2 is 12 ohms, 12.5 ohms, 13 ohms, 13.5 ohms, or 14 ohms. The specific resistance of the second voltage dividing resistor R2 is determined by the specific requirement of the display panel production line.
Wherein, the resistance value of the third voltage dividing resistor R3 is 29 ohm to 31 ohm. Specifically, the resistance value of the third voltage dividing resistor R3 is 29 ohms, 29.5 ohms, 30 ohms, 30.5 ohms, or 31 ohms. The specific resistance of the third voltage dividing resistor R3 is determined by the specific requirement of the display panel production line.
The resistance of the fourth voltage dividing resistor R4 is 42 ohms to 44 ohms. Specifically, the resistance value of the fourth voltage dividing resistor R4 is 42 ohms, 42.5 ohms, 43 ohms, 43.5 ohms, or 44 ohms. The specific resistance of the fourth voltage dividing resistor R4 is determined by the specific requirement of the display panel production line.
Wherein, the resistance value of the fifth voltage dividing resistor R5 is 55 ohm to 57 ohm. Specifically, the resistance value of the fifth voltage dividing resistor R5 is 55 ohms, 55.5 ohms, 56 ohms, 56.5 ohms, or 57 ohms. The specific resistance of the fifth voltage dividing resistor R5 is determined by the specific requirement of the display panel production line.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating a third configuration of a second embodiment of a common voltage supply circuit according to an embodiment of the application. As shown in fig. 5, the common voltage supply circuit 10 shown in fig. 5 is different from the common voltage supply circuit 10 shown in fig. 2 in that: the voltage dividing module 102 includes a fifth voltage dividing unit 1025, a sixth voltage dividing unit 1026, a seventh voltage dividing unit 1027, and an eighth voltage dividing unit 1028.
The fifth voltage dividing unit 1025 is electrically connected to the ground GND, the output module 101 and the display panel. The sixth voltage dividing unit 1026 is electrically connected to the ground GND, the output module 101, and the display panel. The seventh voltage dividing unit 1027 is electrically connected to the ground GND, the sixth voltage dividing unit 1026, and the display panel. The eighth voltage dividing unit 1028 is electrically connected to the ground GND, the seventh voltage dividing unit 1027, and the display panel.
The fifth voltage dividing unit 1025 is used for providing the second common voltage Vcom2 to the display panel. The sixth voltage division unit 1026 is configured to supply the third common voltage Vcom3 to the display panel. The seventh voltage division unit 1027 is used to supply the fourth common voltage Vcom4 to the display panel. The eighth voltage dividing unit 1028 is used for providing the fifth common voltage Vcom5 to the display panel.
It should be noted that, the common voltage providing circuit 10 according to the embodiment of the present application calculates the maximum common voltage required in the display panel. Then, the value of the first common voltage Vcom1 outputted from the adjustment output module 101 to the display panel is consistent with the value of the maximum common voltage required in the display panel. Then, the first voltage division unit 1022 is used to divide the first common voltage Vcom1 into a second common voltage Vcom2; dividing the first common voltage Vcom1 into a third common voltage Vcom3 by using the second dividing unit 1023; dividing the third common voltage Vcom3 by a third division unit 1023 to form a fourth common voltage Vcom4; the third common voltage Vcom3 is divided by the fourth dividing unit 1024 to form a fifth common voltage Vcom5.
In the embodiment of the application, the first common voltage Vcom1 is adopted to sequentially divide the second common voltage Vcom2 and the third common voltage Vcom3. Then, the third common voltage Vcom3 is used to divide the fourth common voltage Vcom4 and the fifth common voltage Vcom5 in sequence.
It should be noted that, first, the embodiment of the present application can provide the first common voltage Vcom1, the second common voltage Vcom2, the third common voltage Vcom3, the fourth common voltage Vcom4, and the fifth common voltage Vcom5, so as to meet the requirements of the existing display panel. Secondly, since in the production line we can only determine the value of the third common voltage Vcom3 required for the display panel and the range of the difference between the respective common voltages Vcom; therefore, the fourth common voltage Vcom4 and the fifth common voltage Vcom5 are sequentially divided by the third common voltage Vcom3, so that accuracy of the obtained common voltage Vcom value can be ensured, and yield of the display panel production line can be improved. Third, the first, second, third, fourth and fifth common voltages Vcom1, vcom2, vcom3, vcom4 and Vcom5 provided in the embodiment of the application are sequentially reduced according to a preset value. The preset value is 0.08 to 0.11 volts, so that the production requirement of the display panel can be met, and the display panel can be produced in a large scale.
Referring to fig. 6, fig. 6 is a second circuit schematic diagram of the voltage dividing module according to the embodiment of the application. As shown in fig. 6, in the voltage dividing module 102 provided in the embodiment of the present application,
the fifth voltage dividing unit 1025 includes a sixth voltage dividing resistor R6 and a seventh voltage dividing resistor R7.
One end of the sixth voltage dividing resistor R6 is electrically connected to the ground GND, the other end of the sixth voltage dividing resistor R6 is electrically connected to the display panel, and is electrically connected to one end of the seventh voltage dividing resistor R7, and the other end of the seventh voltage dividing resistor R7 is electrically connected to the output module 101.
The sixth voltage dividing unit 1026 includes a sixth voltage dividing resistor R6 and an eighth voltage dividing resistor R8.
One end of the sixth voltage dividing resistor R6 is electrically connected to the ground GND, the other end of the sixth voltage dividing resistor R6 is electrically connected to the display panel, and is electrically connected to the first end P of the eighth voltage dividing resistor R8, and the second end Q of the eighth voltage dividing resistor R8 is electrically connected to the output module 101.
The seventh voltage dividing unit 1027 includes a sixth voltage dividing resistor R6 and a ninth voltage dividing resistor R9.
One end of the sixth voltage dividing resistor R6 is electrically connected to the ground GND, the other end of the sixth voltage dividing resistor R6 is electrically connected to the display panel, and is electrically connected to the first end M of the ninth voltage dividing resistor R9, and the second end N of the ninth voltage dividing resistor R9 is electrically connected to the first end P of the eighth voltage dividing resistor R8.
The eighth voltage dividing unit 1028 includes a sixth voltage dividing resistor R6 and a tenth voltage dividing resistor R10. One end of the sixth voltage dividing resistor R6 is electrically connected to the ground GND, the other end of the sixth voltage dividing resistor R6 is electrically connected to the display panel, and is electrically connected to one end of the tenth voltage dividing resistor R10, and the other end of the tenth voltage dividing resistor R10 is electrically connected to the first end M of the ninth voltage dividing resistor R9.
The resistance of the sixth voltage dividing resistor R6 is far greater than the resistance of the seventh voltage dividing resistor R7, the resistance of the eighth voltage dividing resistor R8, the resistance of the ninth voltage dividing resistor R9, and the resistance of the tenth voltage dividing resistor R10.
The resistance value of the sixth voltage dividing resistor R6 is 990 ohm to 1010 ohm. Specifically, the resistance value of the sixth dividing resistor R6 is 990 ohms, 992 ohms, 994 ohms, 997 ohms, 1000 ohms, 1005 ohms, or 1010 ohms. The specific resistance of the sixth voltage dividing resistor R6 is determined by the specific requirement of the display panel production line.
The resistance value of the seventh voltage dividing resistor R7 is 12 ohms to 14 ohms. Specifically, the resistance value of the seventh voltage dividing resistor R7 is 12 ohms, 12.5 ohms, 13 ohms, 13.5 ohms, or 14 ohms. The specific resistance of the seventh voltage dividing resistor R7 is determined by the specific requirement of the display panel production line.
Wherein, the resistance value of the eighth voltage dividing resistor R8 is 29 ohm to 31 ohm. Specifically, the resistance value of the eighth voltage dividing resistor R8 is 29 ohms, 29.5 ohms, 30 ohms, 30.5 ohms, or 31 ohms. The specific resistance of the eighth voltage dividing resistor R8 is determined by the specific requirement of the display panel production line.
The resistance value of the ninth voltage dividing resistor R9 is 14 ohms to 16 ohms. Specifically, the resistance value of the ninth voltage dividing resistor R9 is 14 ohms, 14.5 ohms, 15 ohms, 15.5 ohms, or 16 ohms. The specific resistance of the ninth voltage dividing resistor R9 is determined by the specific requirement of the display panel production line.
The resistance value of the tenth piezoresistor R10 is 14 ohms to 16 ohms. Specifically, the resistance value of the tenth piezoresistor R10 is 14 ohms, 14.5 ohms, 15 ohms, 15.5 ohms, or 16 ohms. The specific resistance of the tenth resistor R10 is determined by the specific requirements of the display panel production line.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a third implementation of the common power supply circuit according to an embodiment of the present application. As shown in fig. 7, the common voltage supply circuit shown in fig. 7 is different from the common voltage supply circuit shown in fig. 1 in that: the common voltage supply circuit 10 further includes an amplifying module 103.
The amplifying module 103 is electrically connected to the voltage dividing module 102 and the display panel. The amplifying module 103 is used for amplifying the common voltage Vcom so that the common voltage Vcom meets the display panel requirement.
It should be noted that, the common voltage Vcom obtained by the voltage dividing module 102 may not be suitable for the display panel to be directly used, so the amplifying module 103 needs to be set to process the common voltage Vcom so that the common voltage Vcom meets the display panel requirement.
It should be noted that, the amplifying module 103 includes a plurality of amplifying transistors.
The common voltage supply circuit 10 provided in the embodiment of the application includes an output module and a voltage dividing module. The voltage dividing module can generate multiple paths of public voltages according to the preset voltage output by the output module so as to meet the requirements of the existing display panel. In addition, the multi-channel public voltage output by the voltage dividing module is sequentially reduced according to a preset value, and the preset value is 0.08 to 0.11 volt, so that the requirement of production of the display panel can be met, and the display panel can be produced in a large scale.
The embodiment of the application also provides a display device. Referring to fig. 8, fig. 8 is a schematic structural diagram of a display device according to an embodiment of the application. As shown in fig. 8, a display device 100 according to an embodiment of the present application includes a display panel 100a and a driving chip 100b connected to the display panel 100 a. The driving chip 100b is provided with a common voltage supply circuit 10. The common voltage supply circuit 10 may be specifically referred to the above description of the common voltage supply circuit, and will not be described herein.
The above description has been made in detail about a common voltage supply circuit and a display device provided by the embodiments of the present application, and specific examples are applied herein to illustrate the principles and embodiments of the present application, the above description of the embodiments is only for helping to understand the method and core ideas of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (8)
1. A common voltage supply circuit, which is characterized by comprising an output module and a voltage division module; wherein,,
the output module is electrically connected with the voltage dividing module and is used for outputting preset voltage according to external signals;
the voltage division module is electrically connected to the display panel, and is used for generating multiple paths of public voltages according to the preset voltage, outputting the multiple paths of public voltages to the display panel, and sequentially reducing the multiple paths of public voltages according to a preset value, wherein the preset value is 0.08-0.11V;
the output module is further electrically connected to the display panel, and is used for providing a first common voltage for the display panel;
the voltage division module comprises a first voltage division unit, a second voltage division unit, a third voltage division unit and a fourth voltage division unit; wherein,,
the first voltage dividing unit is electrically connected to the grounding end, the output module and the display panel, the first voltage dividing unit is used for providing a second public voltage for the display panel, the second voltage dividing unit is electrically connected to the grounding end, the output module and the display panel, the second voltage dividing unit is used for providing a third public voltage for the display panel, the third voltage dividing unit is electrically connected to the grounding end, the output module and the display panel, the third voltage dividing unit is used for providing a fourth public voltage for the display panel, the fourth voltage dividing unit is electrically connected to the grounding end, the output module and the display panel, and the fourth voltage dividing unit is used for providing a fifth public voltage for the display panel.
2. The circuit of claim 1, wherein the first voltage dividing unit comprises a first voltage dividing resistor and a second voltage dividing resistor, one end of the first voltage dividing resistor is electrically connected to the ground terminal, the other end of the first voltage dividing resistor is electrically connected to the display panel and is electrically connected to one end of the second voltage dividing resistor, and the other end of the second voltage dividing resistor is electrically connected to the output module;
the second voltage dividing unit comprises a first voltage dividing resistor and a third voltage dividing resistor, one end of the first voltage dividing resistor is electrically connected with the grounding end, the other end of the first voltage dividing resistor is electrically connected with the display panel and is electrically connected with one end of the third voltage dividing resistor, and the other end of the third voltage dividing resistor is electrically connected with the output module;
the third voltage dividing unit comprises a first voltage dividing resistor and a fourth voltage dividing resistor, one end of the first voltage dividing resistor is electrically connected with the grounding end, the other end of the first voltage dividing resistor is electrically connected with the display panel and is electrically connected with one end of the fourth voltage dividing resistor, and the other end of the fourth voltage dividing resistor is electrically connected with the output module;
the fourth voltage dividing unit comprises a first voltage dividing resistor and a fifth voltage dividing resistor, one end of the first voltage dividing resistor is electrically connected with the grounding end, the other end of the first voltage dividing resistor is electrically connected with the display panel and is electrically connected with one end of the fifth voltage dividing resistor, and the other end of the fifth voltage dividing resistor is electrically connected with the output module.
3. The common voltage supply circuit according to claim 2, wherein the first voltage dividing resistor has a resistance of 990 to 1010 ohms, the second voltage dividing resistor has a resistance of 12 to 14 ohms, the third voltage dividing resistor has a resistance of 29 to 31 ohms, the fourth voltage dividing resistor has a resistance of 42 to 44 ohms, and the fifth voltage dividing resistor has a resistance of 55 to 57 ohms.
4. The common voltage supply circuit according to claim 1, wherein the voltage dividing module includes a fifth voltage dividing unit, a sixth voltage dividing unit, a seventh voltage dividing unit, and an eighth voltage dividing unit; wherein,,
the fifth voltage dividing unit is electrically connected to the ground terminal, the output module and the display panel, the fifth voltage dividing unit is used for providing a second common voltage for the display panel, the sixth voltage dividing unit is electrically connected to the ground terminal, the output module and the display panel, the sixth voltage dividing unit is used for providing a third common voltage for the display panel, the seventh voltage dividing unit is electrically connected to the ground terminal, the sixth voltage dividing unit and the display panel, the seventh voltage dividing unit is used for providing a fourth common voltage for the display panel, the eighth voltage dividing unit is electrically connected to the ground terminal, the seventh voltage dividing unit and the display panel, and the eighth voltage dividing unit is used for providing a fifth common voltage for the display panel.
5. The circuit of claim 4, wherein the fifth voltage dividing unit comprises a sixth voltage dividing resistor and a seventh voltage dividing resistor, one end of the sixth voltage dividing resistor is electrically connected to the ground, the other end of the sixth voltage dividing resistor is electrically connected to the display panel and is electrically connected to one end of the seventh voltage dividing resistor, and the other end of the seventh voltage dividing resistor is electrically connected to the output module;
the sixth voltage dividing unit comprises a sixth voltage dividing resistor and an eighth voltage dividing resistor, one end of the sixth voltage dividing resistor is electrically connected with the grounding end, the other end of the sixth voltage dividing resistor is electrically connected with the display panel and is electrically connected with the first end of the eighth voltage dividing resistor, and the second end of the eighth voltage dividing resistor is electrically connected with the output module;
the seventh voltage dividing unit comprises a sixth voltage dividing resistor and a ninth voltage dividing resistor, one end of the sixth voltage dividing resistor is electrically connected to the grounding end, the other end of the sixth voltage dividing resistor is electrically connected to the display panel and is electrically connected to the first end of the ninth voltage dividing resistor, and the second end of the ninth voltage dividing resistor is electrically connected to the first end of the eighth voltage dividing resistor;
the eighth voltage dividing unit comprises a sixth voltage dividing resistor and a tenth voltage dividing resistor, one end of the sixth voltage dividing resistor is electrically connected to the grounding end, the other end of the sixth voltage dividing resistor is electrically connected to the display panel and is electrically connected to one end of the tenth voltage dividing resistor, and the other end of the tenth voltage dividing resistor is electrically connected to the first end of the ninth voltage dividing resistor.
6. The common voltage supply circuit according to claim 5, wherein the sixth voltage dividing resistor has a resistance of 990 to 1010 ohms, the seventh voltage dividing resistor has a resistance of 12 to 14 ohms, the eighth voltage dividing resistor has a resistance of 49 to 51 ohms, the ninth voltage dividing resistor has a resistance of 14 to 16 ohms, and the tenth voltage dividing resistor has a resistance of 14 to 16 ohms.
7. The common voltage supply circuit of claim 1, further comprising an amplifying module electrically connected to the voltage dividing module and the display panel, the amplifying module being configured to amplify the common voltage so that the common voltage meets the display panel requirement.
8. The display device is characterized by comprising a display panel and a driving chip connected with the display panel; wherein the drive chip is provided with the common voltage supply circuit as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210419924.XA CN114743517B (en) | 2022-04-20 | 2022-04-20 | Common voltage supply circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210419924.XA CN114743517B (en) | 2022-04-20 | 2022-04-20 | Common voltage supply circuit and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114743517A CN114743517A (en) | 2022-07-12 |
| CN114743517B true CN114743517B (en) | 2023-10-13 |
Family
ID=82284261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210419924.XA Active CN114743517B (en) | 2022-04-20 | 2022-04-20 | Common voltage supply circuit and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114743517B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050019170A (en) * | 2003-08-18 | 2005-03-03 | 삼성전자주식회사 | Liquid Crystal Display Device, Driving Device and Testing Method For The Same |
| TW200721074A (en) * | 2005-11-22 | 2007-06-01 | Prime View Int Co Ltd | Method and circuit for common voltage setup and measurement |
| CN101187734A (en) * | 2006-11-15 | 2008-05-28 | 群康科技(深圳)有限公司 | Liquid crystal display manufacture method |
| CN101191919A (en) * | 2006-12-01 | 2008-06-04 | 群康科技(深圳)有限公司 | Public electrode voltage regulating circuit, LCD panel driver circuit and LCD device |
| CN101256745A (en) * | 2007-02-28 | 2008-09-03 | 群康科技(深圳)有限公司 | Public voltage generating circuit and LCD thereof |
| CN101872591A (en) * | 2009-04-22 | 2010-10-27 | 瑞鼎科技股份有限公司 | Overload driving device used for driving liquid crystal display panel |
| CN103037589A (en) * | 2012-12-26 | 2013-04-10 | 深圳创维－Rgb电子有限公司 | Light-emitting diode (LED) constant current drive circuit and liquid crystal display television (LCD TV) |
| CN103745695A (en) * | 2013-12-02 | 2014-04-23 | 深圳市华星光电技术有限公司 | Gamma voltage drive circuit, source drive module and liquid crystal display panel |
| CN104199204A (en) * | 2014-08-14 | 2014-12-10 | 京东方科技集团股份有限公司 | Adjusting circuit and displaying device of common electrode voltage |
| CN105895041A (en) * | 2016-06-06 | 2016-08-24 | 深圳市华星光电技术有限公司 | Common electrode driver module and liquid crystal display panel |
| CN110148386A (en) * | 2019-05-08 | 2019-08-20 | 深圳市华星光电技术有限公司 | Common voltage provides circuit and display panel |
| CN111028754A (en) * | 2019-12-06 | 2020-04-17 | 深圳市华星光电半导体显示技术有限公司 | Display panel |
| CN210606577U (en) * | 2019-10-15 | 2020-05-22 | 华显光电技术（惠州）有限公司 | Voltage regulating circuit of display panel and display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100438968B1 (en) * | 2001-12-31 | 2004-07-03 | 엘지.필립스 엘시디 주식회사 | Power supply of liquid crystal panel |
-
2022
- 2022-04-20 CN CN202210419924.XA patent/CN114743517B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050019170A (en) * | 2003-08-18 | 2005-03-03 | 삼성전자주식회사 | Liquid Crystal Display Device, Driving Device and Testing Method For The Same |
| TW200721074A (en) * | 2005-11-22 | 2007-06-01 | Prime View Int Co Ltd | Method and circuit for common voltage setup and measurement |
| CN101187734A (en) * | 2006-11-15 | 2008-05-28 | 群康科技(深圳)有限公司 | Liquid crystal display manufacture method |
| CN101191919A (en) * | 2006-12-01 | 2008-06-04 | 群康科技(深圳)有限公司 | Public electrode voltage regulating circuit, LCD panel driver circuit and LCD device |
| CN101256745A (en) * | 2007-02-28 | 2008-09-03 | 群康科技(深圳)有限公司 | Public voltage generating circuit and LCD thereof |
| CN101872591A (en) * | 2009-04-22 | 2010-10-27 | 瑞鼎科技股份有限公司 | Overload driving device used for driving liquid crystal display panel |
| CN103037589A (en) * | 2012-12-26 | 2013-04-10 | 深圳创维－Rgb电子有限公司 | Light-emitting diode (LED) constant current drive circuit and liquid crystal display television (LCD TV) |
| CN103745695A (en) * | 2013-12-02 | 2014-04-23 | 深圳市华星光电技术有限公司 | Gamma voltage drive circuit, source drive module and liquid crystal display panel |
| CN104199204A (en) * | 2014-08-14 | 2014-12-10 | 京东方科技集团股份有限公司 | Adjusting circuit and displaying device of common electrode voltage |
| CN105895041A (en) * | 2016-06-06 | 2016-08-24 | 深圳市华星光电技术有限公司 | Common electrode driver module and liquid crystal display panel |
| CN110148386A (en) * | 2019-05-08 | 2019-08-20 | 深圳市华星光电技术有限公司 | Common voltage provides circuit and display panel |
| CN210606577U (en) * | 2019-10-15 | 2020-05-22 | 华显光电技术（惠州）有限公司 | Voltage regulating circuit of display panel and display device |
| CN111028754A (en) * | 2019-12-06 | 2020-04-17 | 深圳市华星光电半导体显示技术有限公司 | Display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114743517A (en) | 2022-07-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8570268B2 (en) | Driving method of liquid crystal display | |
| CN102129845B (en) | Liquid crystal panel driving circuit and liquid crystal display device | |
| US10957270B1 (en) | GOA circuit and liquid crystal display device having the same | |
| CN101211543B (en) | Liquid crystal device driving circuit and method | |
| CN102456335B (en) | Liquid crystal display device and driving method of the same | |
| CN105448261A (en) | Liquid crystal display | |
| CN103871372B (en) | For driving the device of light emitting diode matrix and using its liquid crystal indicator | |
| US9754550B1 (en) | Current mode DVR or PVCOM with integrated impedances | |
| CN103680427A (en) | Liquid crystal display and shift registering device thereof | |
| CN108962180B (en) | Gamma switching circuit and liquid crystal display device | |
| WO2019076098A1 (en) | Driving method, driving device, and display device | |
| CN109166543A (en) | Method of data synchronization, driving device and display device | |
| CN102087839B (en) | Device and method for driving liquid crystal display device | |
| CN100451747C (en) | Gamma correction device, gamma correction method thereof, and liquid crystal display device using the same | |
| CN101334680B (en) | Public voltage generation circuit and LCD device | |
| CN106531093A (en) | Liquid crystal display device driving method and liquid crystal display device | |
| CN114743517B (en) | Common voltage supply circuit and display device | |
| KR102459705B1 (en) | Liquid crystal display device | |
| US20140340291A1 (en) | Chamfered Circuit and Control Method Thereof | |
| US20100321359A1 (en) | Common voltage generating circuit of an lcd | |
| CN209496615U (en) | Driving device and display device | |
| CN101989001B (en) | Common voltage generating circuit of liquid crystal display | |
| CN101295470A (en) | Gamma voltage output circuit | |
| TWI273542B (en) | Cascade driver circuit for liquid crystal display | |
| KR101771254B1 (en) | Liquid crystal display |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |