CN111179876A - Driving circuit, display device and driving method of display panel - Google Patents
Driving circuit, display device and driving method of display panel Download PDFInfo
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- CN111179876A CN111179876A CN202010119993.XA CN202010119993A CN111179876A CN 111179876 A CN111179876 A CN 111179876A CN 202010119993 A CN202010119993 A CN 202010119993A CN 111179876 A CN111179876 A CN 111179876A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000000694 effects Effects 0.000 abstract description 8
- 239000010409 thin film Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000011895 specific detection 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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- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a driving circuit, a display device and a driving method of a display panel, wherein the driving circuit comprises: the adjusting module is used for detecting the service time of the display panel and judging whether the service time is matched with a plurality of preset time intervals in a preset time list or not; if the use time length is matched with the preset time length interval, acquiring offset voltage corresponding to the preset time length interval; adjusting the set power supply voltage according to the offset voltage; the preset time length list is stored with a plurality of preset time length intervals and a plurality of offset voltages, wherein each preset time length interval corresponds to one offset voltage; and the driving module is used for generating a data signal according to the adjusted set power supply voltage. The driving circuit, the display device 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, a display device, and a driving method of a display panel.
[ background of the invention ]
The display panel is mainly driven by a driving circuit to display a picture. The display panel is usually provided with a thin film transistor, however, due to the influence of process factors, the capacitance of the thin film transistor in the display panel is usually large, and therefore, as the usage time length increases, the voltage current curve is shifted, as shown in fig. 1, the abscissa in fig. 1 represents voltage, the ordinate represents current, the solid line represents the voltage current curve which is not shifted, the dotted line represents the voltage current curve after being shifted, and as the usage time length is longer, the voltage current curve is shifted more seriously, the display effect is worse, that is, as the usage time length increases, the on condition of the thin film transistor is worse, and the display effect is reduced.
Therefore, it is necessary to provide a driving circuit, a display device 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, a display device and a driving method of a display panel, which can avoid the reduction of the display effect along with the increase of the service life.
To solve the above technical problem, the present invention provides a driving circuit, including:
the adjusting module is used for detecting the service time of the display panel and judging whether the service time is matched with a plurality of preset time intervals in a preset time list or not; if the use time length is matched with the preset time length interval, acquiring offset voltage corresponding to the preset time length interval; adjusting the set power supply voltage according to the offset voltage; the preset time length list is stored with a plurality of preset time length intervals and a plurality of offset voltages, wherein each preset time length interval corresponds to one offset voltage;
and the driving module is used for generating a data signal according to the adjusted set power supply voltage.
The invention also provides a display device which comprises the driving circuit and a display panel.
The invention also provides a driving method of the display panel, which comprises the following steps:
detecting the use duration of the display panel;
when the service time length is matched with a plurality of preset time length intervals in a preset time length list, acquiring offset voltage corresponding to the preset time length intervals; the preset time length list is stored with a plurality of preset time length intervals and a plurality of offset voltages, wherein each preset time length interval corresponds to one offset voltage;
adjusting the set power supply voltage according to the offset voltage;
and generating a data signal according to the adjusted set power supply voltage.
The driving circuit, the display device and the driving method of the display panel comprise an adjusting module, a display module and a display module, wherein the adjusting module is used for detecting the use duration of the display panel and judging whether the use duration is matched with a plurality of preset duration intervals in a preset duration list; if the use time length is matched with the preset time length interval, acquiring offset voltage corresponding to the preset time length interval; adjusting the set power supply voltage according to the offset voltage; the preset time length list is stored with a plurality of preset time length intervals and a plurality of offset voltages, wherein each preset time length interval corresponds to one offset voltage; the driving module is used for generating a data signal according to the adjusted set power supply voltage; because the corresponding offset voltage is obtained according to the use duration and the set power supply voltage is adjusted according to the offset voltage, the offset of the voltage-current curve of the thin film transistor is avoided, and the display effect is improved.
[ description of the drawings ]
FIG. 1 is a voltage-current curve of a TFT in a conventional display panel;
FIG. 2 is a schematic diagram of a driving circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a driving circuit according to another embodiment of the invention.
Fig. 4 is a schematic structural diagram of a display device according to the present 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. 2 to 3, fig. 2 is a schematic structural diagram of a driving circuit according to an embodiment of the invention.
As shown in fig. 2 and 3, the driving circuit 100 of the present embodiment is used for driving a display panel, and in an embodiment, the driving circuit 100 includes a regulating module 10 and a driving module 20.
The adjusting module 10 is configured to detect a duration of use of the display panel, and determine whether the duration of use matches a plurality of preset duration intervals in a preset duration list; if the use time length is matched with the preset time length interval, acquiring offset voltage corresponding to the preset time length interval; adjusting the set power supply voltage according to the offset voltage; the preset time length list is stored with a plurality of preset time length intervals and a plurality of offset voltages, wherein each preset time length interval corresponds to one offset voltage. In one embodiment, the offset voltage is proportional to the length of time of use. The set power supply voltage is used to supply power to the driving module 20. Of course, the relationship between the offset voltage and the use period is not limited thereto.
In one embodiment, as shown in fig. 3, the adjusting module 10 includes a timer 11, a comparator set, and a control unit 12.
The timer 11 is used for detecting the use duration of the display panel.
The comparator group comprises a plurality of comparators C1-C5, first inputs of the comparators are connected with an output of the timer 11; a second input end of the comparator is connected with one preset time length from t1 to t 5; the output terminals of the comparators are all connected with the control unit 12. In an embodiment, the control unit 12 is configured to, when one of the comparators outputs, obtain an offset voltage corresponding to a preset time period accessed by the comparator, and adjust the set power supply voltage according to the offset voltage. For example, when the comparator C5 outputs, the offset voltage corresponding to the preset time period t5 is obtained, where each preset time period corresponds to a preset time period, each preset time period corresponds to an offset voltage, the preset time period may be the maximum time period in the preset time period, for example, when the preset time period is greater than 1 and less than or equal to 2, the preset time period accessed by the second input terminal of the second comparator C2 is 2, and the rest of the comparators are similar to each other. In another embodiment, to improve the accuracy, offset voltages corresponding to differences between the duration of use and a preset duration accessed by the comparator may be obtained, where each difference corresponds to a preset difference range, and each preset difference range corresponds to an offset voltage. For example, when the duration of use is greater than or equal to 1 and less than 2, t1 is equal to 1, and the difference between the duration of use and the preset duration t1 ranges from 0 to 1, so that the output of the comparator C1 is that when the difference between the duration of use and the preset duration t1 ranges from greater than or equal to 0 and less than 0.5, the offset voltage is 0.5, and when the difference between the duration of use and the preset duration t1 ranges from greater than or equal to 0.5 and less than 1, the offset voltage is 1, where the preset durations accessed by the second input terminals of the comparators are not equal, that is, t1 to t5 are not equal.
The control unit 12 is configured to adjust the set power supply voltage stored in the register 221 according to the offset voltage. In one embodiment, t1 to t5 are 1 to 5 years, respectively, and when the duration of use is greater than or equal to 1 year but less than 2 years, the comparator C1 outputs the output, at which time the control unit 12 increases the set power voltage by 1V, and when the duration of use is greater than or equal to 2 years but less than 3 years, the comparator C3 outputs the output, at which time the control unit 12 increases the set power voltage by 2V, and the rest of the comparators are similar to each other and will not be described herein again.
The driving module 20 is configured to generate a data signal according to the adjusted set power voltage, wherein the driving module 20 is connected to the display panel, and specifically, may be connected to a data line in the display panel. In one embodiment, the driving module 20 includes a timing controller 21 and a power management ic 22, the power management ic 22 includes a register 221, and the register 221 stores the set power voltage. The control unit 12 is connected to the register 221 via a serial bus, for example, I2C bus including data walkLine SDA and control trace SCL. It is understood that the driving module 20 may further include a source driving module and a gate driving module, and the specific structure of the driving module 20 is not limited.
In one embodiment, the adjusting module 10 is integrated into the timing controller 21 to simplify the manufacturing process and improve the acquisition accuracy of the usage duration.
In one embodiment, the set power supply voltage includes a first power supply voltage and a second power supply voltage, and the first power supply voltage is greater than the second power supply voltage. The first power supply voltage is VGH, and the second power supply voltage is VGL. In an embodiment, the control unit 12 is configured to increase the set power supply voltage according to the offset voltage. Of course, when the set power voltage is other voltage, the control unit 12 may also decrease the set power voltage according to the offset voltage. It is to be understood that fig. 2 is only an example, and the specific structure of the driving circuit of the present invention is not limited thereto.
As shown in fig. 4, the present invention further provides a display device including any one of the driving circuits 100 and the display panel 200. The display panel 200 is used for displaying a picture, and the display panel 200 may be a liquid crystal display panel. Of course, the display panel 200 includes data lines, scan lines and a plurality of sub-pixels. It is to be understood that the kind of the display panel is not limited.
The invention also provides a driving method of the display panel, which comprises the following steps:
s101, detecting the service life of the display panel;
for example, referring to fig. 3, in an embodiment, the usage duration of the display panel may be detected by the timer 11, and the specific detection manner is not limited thereto.
S102, when the using time length is matched with a plurality of preset time length intervals in a preset time length list, acquiring offset voltage corresponding to the preset time length intervals;
for example, a preset duration list is pre-stored in the display device, a plurality of preset duration intervals and a plurality of offset voltages are stored in the preset duration list, and each preset duration interval corresponds to one offset voltage. It is understood that the offset voltage is obtained by testing in advance.
And when the service time length is matched with one of the preset time length intervals, acquiring the offset voltage corresponding to the preset time length interval. In one embodiment, for example, the preset duration interval is shown in the following table:
| time interval (year) | Offset voltage (V) |
| 0 to 1 | 1 |
| 1 to 2 | 2 |
| 2 to 3 | 3 |
| 3 to 4 | 4 |
| 4 to 5 | 5 |
S103, adjusting the set power supply voltage according to the offset voltage;
for example, the set power supply voltage is adjusted according to the offset voltage acquired in step S102. For example, when it is detected that the usage time of the display panel is 4, the corresponding offset voltage is 4, and VGH and VGL are increased by 4V.
When the service life of the display panel is detected to be 3.5, the corresponding offset voltage is 3, and then the voltages are respectively increased by 3V for VGH and VGL. Of course, the preset duration list is not limited thereto.
And S104, generating a data signal according to the adjusted set power supply voltage.
For example, the driving module generates a data signal according to the adjusted set power voltage, so that the voltage-current curve of the thin film transistor is prevented from deviating, and the display effect is improved.
Because the corresponding offset voltage is obtained according to the use duration and the set power supply voltage is adjusted according to the offset voltage, the offset of the voltage-current curve of the thin film transistor is avoided, and the display effect is improved.
The driving circuit, the display device and the driving method of the display panel comprise an adjusting module, a display module and a display module, wherein the adjusting module is used for detecting the use duration of the display panel and judging whether the use duration is matched with a plurality of preset duration intervals in a preset duration list; if the use time length is matched with the preset time length interval, acquiring offset voltage corresponding to the preset time length interval; adjusting the set power supply voltage according to the offset voltage; the preset time length list is stored with a plurality of preset time length intervals and a plurality of offset voltages, wherein each preset time length interval corresponds to one offset voltage; the driving module is used for generating a data signal according to the adjusted set power supply voltage; because the corresponding offset voltage is obtained according to the use duration and the set power supply voltage is adjusted according to the offset voltage, the offset of the voltage-current curve of the thin film transistor is avoided, 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 driving circuit for driving a display panel, comprising:
the adjusting module is used for detecting the service time of the display panel and judging whether the service time is matched with a plurality of preset time intervals in a preset time list or not; if the use time length is matched with the preset time length interval, acquiring offset voltage corresponding to the preset time length interval; adjusting the set power supply voltage according to the offset voltage; the preset time length list is stored with a plurality of preset time length intervals and a plurality of offset voltages, wherein each preset time length interval corresponds to one offset voltage;
and the driving module is used for generating a data signal according to the adjusted set power supply voltage.
2. The drive circuit according to claim 1,
the adjusting module comprises a timer, a comparator group and a control unit;
the timer is used for detecting the service life of the display panel;
the comparator group comprises a plurality of comparators, and first input ends of the comparators are connected with the output end of the timer; a second input end of the comparator is accessed to one preset time length in a plurality of preset time lengths; the output ends of the comparators are connected with the control unit;
and the control unit is used for acquiring offset voltage corresponding to the preset time length accessed by the comparator when one of the comparators is output, and adjusting the set power supply voltage according to the offset voltage.
3. The drive circuit according to claim 2,
the driving module comprises a power management integrated chip, the power management integrated chip comprises a register, and the set power supply voltage is stored in the register;
the control unit is used for adjusting the set power supply voltage stored in the register according to the offset voltage.
4. The drive circuit according to claim 2,
the control unit is connected with the register through a serial bus.
5. The drive circuit according to claim 2,
the driving module further comprises a time schedule controller, and the adjusting module is integrated in the time schedule controller.
6. The drive circuit according to claim 1,
the set power supply voltage includes a first power supply voltage and a second power supply voltage, and the first power supply voltage is greater than the second power supply voltage.
7. The drive circuit according to claim 6,
the control unit is used for increasing the set power supply voltage according to the offset voltage.
8. The drive circuit according to claim 6,
the offset voltage is proportional to the length of time of use.
9. A display device comprising the driver circuit according to any one of claims 1 to 8 and a display panel.
10. A method of driving a display panel, comprising:
detecting the use duration of the display panel;
when the service time length is matched with a plurality of preset time length intervals in a preset time length list, acquiring offset voltage corresponding to the preset time length intervals;
the preset time length list is stored with a plurality of preset time length intervals and a plurality of offset voltages, wherein each preset time length interval corresponds to one offset voltage;
adjusting the set power supply voltage according to the offset voltage;
and generating a data signal according to the adjusted set power supply voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010119993.XA CN111179876A (en) | 2020-02-26 | 2020-02-26 | Driving circuit, display device and driving method of display panel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010119993.XA CN111179876A (en) | 2020-02-26 | 2020-02-26 | Driving circuit, display device and driving method of display panel |
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| CN111179876A true CN111179876A (en) | 2020-05-19 |
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| CN202010119993.XA Pending CN111179876A (en) | 2020-02-26 | 2020-02-26 | Driving circuit, display device and driving method of display panel |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090102766A1 (en) * | 2007-01-29 | 2009-04-23 | Ryutaro Oke | Display device |
| CN103794174A (en) * | 2012-10-31 | 2014-05-14 | 三星显示有限公司 | Display device, apparatus for compensating degradation and method thereof |
| CN105099189A (en) * | 2015-07-17 | 2015-11-25 | 深圳市华星光电技术有限公司 | Voltage compensation circuit and voltage compensation method based on voltage compensation circuit |
| CN109658880A (en) * | 2017-10-12 | 2019-04-19 | 咸阳彩虹光电科技有限公司 | Pixel compensation method, pixel compensation circuit and display |
| KR20190048477A (en) * | 2017-10-31 | 2019-05-09 | 엘지디스플레이 주식회사 | Liquid crystal display device providing compensation signal for eliminating image sticking |
-
2020
- 2020-02-26 CN CN202010119993.XA patent/CN111179876A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090102766A1 (en) * | 2007-01-29 | 2009-04-23 | Ryutaro Oke | Display device |
| CN103794174A (en) * | 2012-10-31 | 2014-05-14 | 三星显示有限公司 | Display device, apparatus for compensating degradation and method thereof |
| CN105099189A (en) * | 2015-07-17 | 2015-11-25 | 深圳市华星光电技术有限公司 | Voltage compensation circuit and voltage compensation method based on voltage compensation circuit |
| CN109658880A (en) * | 2017-10-12 | 2019-04-19 | 咸阳彩虹光电科技有限公司 | Pixel compensation method, pixel compensation circuit and display |
| KR20190048477A (en) * | 2017-10-31 | 2019-05-09 | 엘지디스플레이 주식회사 | Liquid crystal display device providing compensation signal for eliminating image sticking |
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Application publication date: 20200519 |
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