CN111028799B - Driving circuit and driving method of display panel - Google Patents
Driving circuit and driving method of display panel Download PDFInfo
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- CN111028799B CN111028799B CN201911257529.0A CN201911257529A CN111028799B CN 111028799 B CN111028799 B CN 111028799B CN 201911257529 A CN201911257529 A CN 201911257529A CN 111028799 B CN111028799 B CN 111028799B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
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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
- 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
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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
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a driving circuit and a driving method of a display panel, wherein the driving circuit comprises: a first memory and a second memory; when the second compensation data is the same as the first compensation data, the system board is used for controlling the second memory to output the second compensation data to the gamma module to be used as target compensation data; the system board is used for controlling the second memory to output the target compensation data to the gamma module; when the second compensation data is different from the first compensation data, the system board stores the first compensation data into the second memory and controls the second memory to output the first compensation data to the gamma module to serve as target compensation data; the gamma module is used for compensating the set voltage according to the target compensation data so as to output a compensation voltage. The driving circuit and the driving method of the display panel can improve the display effect.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of display technologies, and in particular, to a driving circuit and a driving method of a display panel.
[ background of the invention ]
The Gamma (Gamma) curve and flicker (flicker) level are important parameters affecting the display quality of the display panel, but due to the differences in panel manufacturing processes, the fixed Gamma curve and common Voltage (VCOM) cannot satisfy all display panels. Therefore, manufacturers often need to perform auto-commissioning (auto-gamma) on the gamma curve and common Voltage (VCOM) of the lcd before leaving the factory to make each display panel approach the standard gamma curve and the optimal flicker parameter, and store the auto-commissioning data in the memory of the source board (OC source board) of the display panel.
However, in order to save cost, manufacturers of liquid crystal displays integrate a timing control chip on a system on board (SOC) so that the SOC will call the data each time the system is turned on. As shown in fig. 1, the conventional display device includes a display panel 10 and a driving circuit 20, wherein the driving circuit 20 includes a source driving chip 21, a source board 22 of the display panel, and a system board (system on chip)24, a first memory 221 is disposed on the source board 22(OC source board) of the display panel, and the source board 22 of the display panel is electrically connected to the system board (system on chip)24 through a flexible connector (FFC) 23. The system board 24 is provided with a timing control chip 241, a power management integrated chip 242, and a second memory 243. The power management ic 242 is an ic of the power management module, the level conversion module and the gamma module. In a specific working process, as shown in steps S101 to S104 in fig. 2, the system board 24 reads original compensation data (automatic debug data) in the first memory 221, then the system board 24 performs format conversion on the original compensation data, writes the format-converted data into the second memory 243, then the system board 24 writes the data in the second memory 243 into the power management integrated chip 242, the power management integrated chip 242 outputs the format-converted data, and then transmits the format-converted data to the gamma module in the power management integrated chip 242, so that the gamma module compensates for an initial gamma voltage according to the acquired data to obtain a compensation voltage, and then the source driver chip 21 generates a data signal according to the compensation voltage, and then inputs the data signal into the display panel.
However, the auto-debug data is stored in a specific format by a panel manufacturer, and often cannot be directly applied to a system board, so that the auto-debug data cannot be directly used, and the format-converted data cannot be completely matched with the data format in the display panel, thereby resulting in a poor display effect.
Therefore, it is necessary to provide a driving circuit and a driving method of a display panel to solve the problems of the prior art.
[ summary of the invention ]
The invention aims to provide a driving circuit and a driving method of a display panel, which can improve the display effect.
To solve the above technical problem, the present invention provides a driving circuit, including:
the source driving chip is electrically connected with the display panel and used for providing data signals for the display panel;
the first circuit board is electrically connected with the source driving chip, a first memory is arranged on the first circuit board, and first compensation data are stored in the first memory;
the second circuit board is electrically connected with the first circuit board, and a gamma module and a second memory are arranged on the second circuit board; the second memory stores second compensation data; the format of the first compensation data is the same as the format of the second compensation data;
the system board is electrically connected with the second circuit board, and when the second compensation data is the same as the first compensation data, the system board is used for controlling the second memory to output the second compensation data to the gamma module to serve as target compensation data;
when the second compensation data is different from the first compensation data, the system board stores the first compensation data into the second memory and controls the second memory to output the first compensation data to the gamma module to serve as target compensation data;
the gamma module is used for compensating the set voltage according to the target compensation data so as to output a compensation voltage.
The present invention also provides a driving method of a display panel, which includes:
the system board judges whether the second compensation data is the same as the first compensation data;
when the second compensation data is the same as the first compensation data, the system board controls a second memory to output the second compensation data to a gamma module as target compensation data;
when the second compensation data is different from the first compensation data, the system board acquires the first compensation data, stores the first compensation data into the second memory, and controls the second memory to output the first compensation data to the gamma module to serve as target compensation data;
and the gamma module compensates the set voltage according to the target compensation data to obtain a compensation voltage.
According to the driving circuit and the driving method of the display panel, the circuit board is additionally provided with the gamma module and the second memory, and the initial data stored in the second memory is in the same data format as the data format stored in the first memory in the first circuit board, so that the system board can be prevented from converting the data format, the debugging data is completely matched with the data format in the display panel, and the display effect is improved.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a conventional display device;
FIG. 2 is a flow chart of a driving method of a conventional display panel;
FIG. 3 is a schematic view of a first structure of a display device according to the present invention;
FIG. 4 is a second structural diagram of a display device according to the present invention;
fig. 5 is a flowchart of a driving method of a display panel according to an embodiment of the invention.
Fig. 6 is a flowchart of a driving method of a display panel according to another embodiment of the invention.
[ detailed description ] embodiments
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc. refer to directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions.
Referring to fig. 3 and 4, fig. 3 is a first structural schematic diagram of the display device of the present invention.
As shown in fig. 3, the display device of the present invention includes a display panel 10 and a driving circuit 200, and the driving circuit 200 includes: a source driver chip 21, a first circuit board 22, a second circuit board 30, and a system board 40.
The source driving chip 21 is electrically connected to the display panel 10, and the source driving chip 21 is used for providing a data signal to the display panel 10. The source driver chip 21 is electrically connected to the data lines of the display panel 10.
The first circuit board 22 is electrically connected to the source driver chip 21, a first memory 221 is disposed on the first circuit board 22, the first memory 221 stores first compensation data S1, and in an embodiment, the first memory 221 further stores a first check code Y1; the first compensation data S1 is the gamma curve and the auto-debug data of VCOM voltage before factory shipment. The first circuit board 22 may be a source board (OC source board) of a display panel.
The second circuit board 30 is electrically connected to the first circuit board 22, and the second circuit board 30 can be connected to the first circuit board 22 through the first flexible connector 23. The second circuit board 30 may be a power board (power board).
The second circuit board 30 is provided with a gamma module 31 and a second memory 34; the second memory 34 stores second compensation data S2, and in one embodiment, the second memory 34 further stores a second check code Y2; in an embodiment, the second circuit board 30 is further provided with a power management module 32 and a level conversion module 33. For example, in one embodiment, the gamma module 31, the power management module 32, and the level conversion module 33 may be separate chips. In another embodiment, as shown in fig. 4, the power management module 31, the level conversion module 32 and the gamma module 33 are integrated in the same chip 50, such as a power management integrated chip.
The format of the first compensation data S1 is the same as the format of the second compensation data S2; the gamma module 31 is used for compensating the set voltage according to the target compensation data to output a compensation voltage; wherein the set voltage is, for example, an initial gamma voltage.
The system board 40 is electrically connected to the second circuit board 30, and a timing control chip 41 may be further disposed on the system board 40. The second circuit board 30 is connected to the system board 40 through a second flexible connector 25. The second flexible connector 25, the first flexible connector 23 may be FFC.
Wherein, when the second compensation data S2 is the same as the first compensation data S1, the system board 40 is configured to control the second memory 34 to output the second compensation data S2 to the gamma module 31 as the target compensation data;
when the second compensation data S2 is not the same as the first compensation data S1, the system board 40 is configured to store the first compensation data in the second memory 34, and control the second memory 34 to output the first compensation data S1 to the gamma module 31 as target compensation data. Wherein the target compensation data is identical to the first compensation data S1, i.e., the format and value of both data are identical.
The system board 40 is specifically configured to determine whether the first check code Y1 and the second check code Y2 are the same, so as to determine whether the second compensation data S1 is the same as the first compensation data S2. The first check code Y1 is used for identifying the format and value of first compensation data S1; the second check code Y2 is used to identify the format and value of the second compensation data S2.
When the first check code Y1 and the second check code Y2 are identical, determining that the second compensation data S1 is identical to the first compensation data S2; when the first check code Y1 and the second check code Y2 are not identical, it is determined that the second compensation data S1 is not identical to the first compensation data S2. When the second compensation data S1 is identical to the first compensation data S2, it indicates that the format of the first compensation data and the format of the second compensation data are identical, and the value of the first compensation data and the value of the second compensation data are identical. Since the format of the first compensation data is the same as that of the second compensation data, when the second compensation data S1 is not the same as the first compensation data S2, it indicates that the value of the first compensation data is not the same as the value of the second compensation data. In this embodiment, a description will be given by taking an example in which the value of the first compensation data is different from the value of the second compensation data.
In an embodiment, as shown in fig. 5, the method for driving a display panel of this embodiment includes:
s201, judging whether the second compensation data is the same as the first compensation data or not by a system board;
for example, the system board 40 determines whether the second compensation data S2 is identical to the first compensation data S1; if the two are the same, step S202 is executed; if not, step S203 is executed. In one embodiment, whether the second compensation data S2 is identical to the first compensation data S1 may be determined by determining whether the first check code and the second check code are identical, thereby improving processing efficiency.
S202, when the second compensation data is the same as the first compensation data, the system board controls a second memory to output the second compensation data to the gamma module to serve as the target compensation data;
for example, when the second compensation data S2 is identical to the first compensation data S1, the system board 40 controls the second memory 34 to output the second compensation data S2 to the gamma module 31 as the target compensation data.
S203, when the second compensation data is different from the first compensation data, the system board acquires first compensation data, stores the first compensation data into the second memory, and controls the second memory to output the first compensation data to the gamma module to serve as target compensation data;
for example, when the second compensation data S2 is not identical to the first compensation data S1, the system board 40 obtains the first compensation data S1 from the first memory 221, the system board 40 stores the first compensation data S1 in the second memory 34, and controls the second memory 34 to output the first compensation data S1 to the gamma module 31 as target compensation data.
And S204, the gamma module compensates the set voltage according to the target compensation data to obtain a compensation voltage.
For example, the gamma module 31 compensates the set voltage according to the target compensation data to obtain a compensation voltage. Such as an initial gamma voltage. The compensation voltage is used to generate a data signal. Specifically, the first circuit board 22 generates a data signal according to the compensation voltage.
In another embodiment, as shown in fig. 6, the method for driving a display panel of this embodiment includes:
s301, the system board respectively obtains a first check code and a second check code;
for example, the system board 40 reads the first check code Y1 in the first memory 221 and the second check code Y2 in the second memory 34.
S302, the system board judges whether the first check code and the second check code are the same;
for example, the system board 40 determines whether the first check code Y1 and the second check code Y2 are the same.
S303, if the first check code is the same as the second check code, the system board controls a second memory to output second compensation data to a gamma module to serve as target compensation data;
for example, the first check code Y1 and the second check code Y2 are the same, the system board 40 controls the second memory 34 to output the second compensation data S2 to the gamma module 31 as target compensation data.
S304, if the first check code is different from the second check code, the system board acquires the first compensation data, stores the first compensation data into a second memory, and controls the second memory to output the first compensation data to the gamma module to serve as target compensation data;
for example, if the first check code Y1 and the second check code Y2 are not the same, the system board 40 obtains the first compensation data S1 from the first memory 221, the system board 40 stores the first compensation data S1 in the second memory 34, and controls the second memory 34 to output the first compensation data S1 to the gamma module 31 as the target compensation data.
S305, the gamma module compensates the set voltage according to the target compensation data to obtain a compensation voltage.
For example, the gamma module 31 compensates the set voltage according to the target compensation data to obtain a compensation voltage. Such as an initial gamma voltage. The compensation voltage is used to generate a data signal. Specifically, the first circuit board 22 generates a data signal according to the compensation voltage.
The second circuit board is developed by a display screen manufacturer, when the first circuit board needs to be automatically debugged before being shipped from a factory, the first circuit board is stored in the first memory 221 in a format corresponding to the first circuit board 22, and meanwhile, the second memory 34 also stores the automatic debugging data in the first memory 221, so that the original data in the second memory 34 is completely matched with the data in the first memory 221 in a normal condition. When the lcd device is repaired (i.e. the second circuit board is replaced), the original data in the second memory 34 may not match the data in the first memory 221.
When the liquid crystal display device is started, the first check code in the first memory 221 and the second check code in the second memory 34 need to be read, if the two check codes are the same, the data stored in the second memory 34 is directly output, the system board 40 is not required to read the original data in the first memory 221, the format conversion of the read data is not required, and the problem that the display effect is poor because the existing data reading and converting cannot be completely matched is solved, so that the display effect is improved.
When the liquid crystal display device is maintained (i.e. the second circuit board is replaced), when the liquid crystal display device is started up for the first time, the first check code in the first memory 221 is inconsistent with the second check code in the second memory 34, and the original data in the first memory 221 is written into the second memory 34, because the format of the original data in the second memory 34 is matched with the format of the data in the first memory 221, the data in the second memory 34 can be completely matched with the data in the first memory 221 after the second circuit board is replaced, and the display effect is further improved. In addition, as long-time data format conversion is not needed, the starting time can be shortened, and the power consumption is reduced.
According to the driving circuit and the driving method of the display panel, the circuit board is additionally provided, the gamma module and the second memory are arranged in the circuit board, and the initial data stored in the second memory is the same as the data format of the first memory in the first circuit board, so that the system board can be prevented from converting the data format, the debugging data is completely matched with the data format in the display panel, and the display effect is improved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A driver circuit, comprising:
the source driving chip is electrically connected with the display panel and used for providing data signals for the display panel;
the first circuit board is electrically connected with the source driving chip, a first memory is arranged on the first circuit board, and first compensation data are stored in the first memory;
the second circuit board is electrically connected with the first circuit board, and a gamma module and a second memory are arranged on the second circuit board; the second memory stores second compensation data; the format of the first compensation data is the same as the format of the second compensation data; and
the system board is electrically connected with the second circuit board, and when the second compensation data is the same as the first compensation data, the system board is used for controlling the second memory to output the second compensation data to the gamma module to serve as target compensation data; when the second compensation data is different from the first compensation data, the system board is used for storing the first compensation data into the second memory and controlling the second memory to output the first compensation data to the gamma module to serve as target compensation data;
the gamma module is used for compensating the set voltage according to the target compensation data so as to output a compensation voltage.
2. The drive circuit according to claim 1,
the target compensation data is the same as the first compensation data.
3. The driving circuit of claim 2, wherein the first memory further stores a first check code; the second memory further stores a second check code; the system board is used for judging whether the first check code and the second check code are the same or not so as to determine whether the second compensation data is the same as the first compensation data or not.
4. The drive circuit according to claim 3,
when the first check code and the second check code are the same, determining that the second compensation data is the same as the first compensation data;
and when the first check code is different from the second check code, determining that the second compensation data is different from the first compensation data.
5. The driving circuit according to claim 1, wherein a timing control chip is further disposed on the system board.
6. The drive circuit according to claim 1,
and the second circuit board is also provided with a power management module and a level conversion module.
7. The drive circuit according to claim 6,
the power management module, the level conversion module and the gamma module are integrated in the same chip.
8. The drive circuit according to claim 1,
the first circuit board is connected with the second circuit board through a first flexible connector.
9. The drive circuit according to claim 1,
the second circuit board is connected with the system board through a second flexible connector.
10. A method of driving a display panel, comprising:
the system board judges whether the second compensation data is the same as the first compensation data;
when the second compensation data is the same as the first compensation data, the system board controls a second memory to output the second compensation data to a gamma module as target compensation data;
when the second compensation data is different from the first compensation data, the system board acquires the first compensation data, stores the first compensation data into the second memory, and controls the second memory to output the first compensation data to the gamma module to serve as target compensation data;
and the gamma module compensates the set voltage according to the target compensation data to obtain a compensation voltage.
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| CN112908241A (en) * | 2021-03-01 | 2021-06-04 | 惠科股份有限公司 | Display control method, device and equipment and identification code recognition system |
| CN116490912A (en) * | 2021-11-24 | 2023-07-25 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN114237376B (en) * | 2021-12-15 | 2023-08-01 | 惠州视维新技术有限公司 | Control method and system of power management integrated chip of display panel |
| CN116129812A (en) * | 2023-02-28 | 2023-05-16 | 京东方科技集团股份有限公司 | Computer readable storage medium, display device, driving circuit and driving method thereof |
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