CN113963662A - Driving method and driving device of OLED device - Google Patents
Driving method and driving device of OLED device Download PDFInfo
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- CN113963662A CN113963662A CN202110998498.5A CN202110998498A CN113963662A CN 113963662 A CN113963662 A CN 113963662A CN 202110998498 A CN202110998498 A CN 202110998498A CN 113963662 A CN113963662 A CN 113963662A
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- 230000000694 effects Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3266—Details of drivers for scan electrodes
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- Computer Hardware Design (AREA)
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention relates to the technical field of control of OLED devices, in particular to a driving method and a driving device of an OLED device, which comprises the steps that two mutually independent voltage driving circuits are arranged in a driving chip of the OLED device in advance to provide different driving voltages; further comprising: dividing a display area of the OLED device into a camera area and a non-camera area in advance, and judging the currently scanned area as the camera area or the non-camera area before the drive chip scans the display area; when the currently scanned area is judged to be a non-camera area, the driving chip calls the first voltage driving circuit to scan; and when the currently scanned area is judged to be the camera area, the driving chip calls the second voltage driving circuit to scan. According to the invention, the pixel points of the camera area and the non-camera area of the OLED device are respectively scanned, so that the brightness of the camera area and the non-camera area is consistent, and the display effect of the OLED device is improved.
Description
Technical Field
The present invention relates to the field of Organic Light-Emitting Diode (OLED) device control technologies, and in particular, to a driving method and a driving apparatus for an OLED device.
Background
COD is the camera technique under the screen, just hides leading camera and all sensors under the screen totally, just so need not reserve the position of camera on the screen with the mode of bang screen, also need not over-and-under type mechanical structure. The basis for this technology implementation is based on OLED screens. Due to the self-luminous characteristic of the OLED screen, the structure of the screen is simpler, the thickness of the screen is thinner than that of a traditional LCD screen, and the light transmittance of the screen is better.
The COD technology has two main difficulties at present, the first is that the traditional earphone can not be used, but the problem is solved by the screen sounding technology (namely, the screen is used as a loudspeaker to make sound). The most difficult problem is how to solve the problem of the imaging quality of the front camera. When the COD technique is applied to the OLED screen, the number of pixels in the COD region or the area of the pixels may be reduced by increasing the light transmittance of the COD region (i.e., the region corresponding to the camera). The scanning circuit to regional and the regional pixel of non-COD of COD adopts same voltage curve to carry out the pixel and scans among the prior art, can lead to regional and regional actual luminance inconsistent of non-COD of COD, leads to the display effect of OLED screen not good, and the experience of giving the user is relatively poor.
Disclosure of Invention
In view of the above problems in the prior art, a driving method and a driving apparatus for an OLED device are provided.
The specific technical scheme is as follows:
the invention comprises a driving method of an OLED device, which comprises the steps of arranging two mutually independent voltage driving circuits in a driving chip of the OLED device in advance to provide different driving voltages; further comprising:
dividing a display area of the OLED device into a camera area and a non-camera area in advance, and judging that the currently scanned area is the camera area or the non-camera area before the drive chip scans the display area;
when the currently scanned area is judged to be the non-camera area, the driving chip calls a first voltage driving circuit to scan;
and when the currently scanned area is judged to be the camera area, the driving chip calls a second voltage driving circuit to scan.
Optionally, before the driving chip scans the display area, a boundary graph of the camera area is pre-drawn and stored in the driving chip;
when the display area is scanned, the driving chip scans the coordinates of the pixel points in the current area, compares the coordinates with a boundary graph of the pre-drawn camera area, and judges whether the coordinates of the currently scanned pixel points are matched with the coordinates of the pixel points in the boundary graph, so as to judge whether the current scanning area is the camera area.
Optionally, the pixels in the same row in the display area are divided into two time periods for scanning according to the area, the pixels in the non-camera area are scanned at a first preset time, and the pixels in the camera area are scanned at a second preset time.
Optionally, when the driving chip calls the first voltage driving circuit, the first voltage driving circuit outputs a corresponding first driving signal to the non-camera area according to the first driving curve;
and when the driving chip calls the second voltage driving circuit, the second voltage driving circuit outputs a corresponding second driving signal to the camera area according to the second driving curve.
Optionally, the maximum node voltage output by the second driving curve is greater than the maximum node voltage output by the first driving curve.
The present invention also includes a driving apparatus of an OLED device, including:
the first voltage driving circuit comprises a plurality of first scanning lines, and pixel points in each row of pixel points in the display area of the OLED device and located in the non-camera area are correspondingly connected with one first scanning line;
the second voltage driving circuit comprises a plurality of second scanning lines, and pixel points positioned in the camera area in each row of pixel points of the display area are correspondingly connected with one second scanning line;
the first voltage driving circuit and the second voltage driving circuit are used for providing different driving voltages.
Optionally, the method further includes:
and the storage module is used for pre-storing the boundary graph of the camera area and the coordinates of the pixel points in the boundary graph.
Optionally, the method further includes:
and the judging module is connected with the storage module and used for comparing the coordinates of the currently scanned pixel points with the boundary graph before scanning the display area so as to judge whether the currently scanned pixel points are the pixel points of the camera area or not and output a judging result.
Optionally, the method further includes:
and the switching module is respectively connected with the judging module, the first voltage driving circuit and the second voltage driving circuit, and calls the corresponding voltage driving circuit to scan according to the judging result output by the judging module.
Optionally, the method further includes:
and the timing module is connected with the switching module and used for timing during display driving, pixel points of the camera area and pixel points of the non-camera area in the same row of pixel points are divided into two time periods for scanning, the first scanning line is used for scanning the pixel points of the non-camera area at a first preset time, and the second scanning line is used for scanning the pixel points of the camera area at a second preset time.
The technical scheme of the invention has the following advantages or beneficial effects: the driving method and the driving device of the OLED device are provided, pixels in a camera area and a non-camera area of a display area of the OLED device are scanned respectively, different driving voltages are provided for the pixels in the two areas, accordingly, the brightness consistency of the camera area and the non-camera area is achieved, and the display effect of the OLED device is improved.
Drawings
Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The drawings are, however, to be regarded as illustrative and explanatory only and are not restrictive of the scope of the invention.
FIG. 1 is a schematic structural diagram of a display region of an OLED device in an embodiment of the present invention;
FIG. 2 is a step diagram of a driving method of an OLED device in an embodiment of the present invention;
FIG. 3 is a driving schematic diagram of an OLED device in an embodiment of the present invention;
FIG. 4 is a graph of the OLED lighting white voltage and the OLED lighting black voltage of the first voltage driving circuit according to the embodiment of the present invention;
FIG. 5 is a normalized curve formed by voltages of gray-scale nodes lit by OLEDs of the first voltage driving circuit according to an embodiment of the present invention;
FIG. 6 is a graph of a first drive curve in an embodiment of the present invention;
FIG. 7 is a graph of the OLED lighting white voltage and the OLED lighting black voltage of the second voltage driving circuit according to the embodiment of the present invention;
FIG. 8 is a normalized curve formed by voltages of gray-scale nodes lit by OLEDs of the second voltage driving circuit according to the embodiment of the present invention;
FIG. 9 is a graph of a second drive curve in an embodiment of the present invention;
fig. 10 is a schematic block diagram of a driving apparatus in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Example one
The invention comprises a driving method of an OLED device, which comprises the steps of arranging two mutually independent voltage driving circuits in a driving chip of the OLED device in advance to provide different driving voltages; as shown in fig. 2, the method further includes:
step S1, dividing the display area of the OLED device into a camera area and a non-camera area in advance, and before the drive chip scans the display area, judging the current scanning area as the camera area or the non-camera area;
step S2a, when the currently scanned area is judged to be a non-camera area, the driving chip calls a first voltage driving circuit to scan;
and step S2b, when the currently scanned area is judged to be the camera area, the driving chip calls the second voltage driving circuit to scan.
Specifically, in this embodiment, as shown in fig. 1, the display area of the OLED device is divided into a camera area 1(COD area) and a non-camera area 2 (non-COD area), and as shown in fig. 3, since there are fewer pixels in the COD area, in order to ensure that the luminance of the COD area is consistent with that of the non-COD area, the luminance of a single pixel in the COD area 1 needs to be increased, which requires that the driving voltage provided to the pixel in the COD area is greater than the driving voltage provided to the pixel in the non-COD area.
Furthermore, in the embodiment of the present invention, two sets of mutually independent voltage driving circuits are built in the driving chip to respectively provide for the pixels in the COD region and the non-COD region, wherein the first voltage driving circuit is used to scan the pixels in the non-COD region, the second voltage driving circuit is used to scan the pixels in the COD region, and driving curves used by the first voltage driving circuit and the second voltage driving circuit are different. Fig. 6 and 9 are driving curves adopted by the first voltage driving circuit and the second voltage driving circuit, respectively, and the maximum value of the second driving curve is greater than the maximum value of the first driving curve.
As an optional implementation manner, when the driver chip calls the first voltage driving circuit, the first voltage driving circuit outputs a corresponding first driving signal to the non-COD region according to the first driving curve; when the driving chip calls the second voltage driving circuit, the second voltage driving circuit outputs a corresponding second driving signal to the COD region according to the second driving curve. As shown in fig. 6 and 9, the maximum node voltage output by the second driving curve LV2 is greater than the maximum node voltage output by the first driving curve LV 1.
As an optional implementation manner, before the driving chip scans the display area, a boundary graph of the camera area is drawn in advance and stored in the driving chip; when the display area is scanned, the driving chip judges whether the coordinates of the currently scanned pixel points are matched with the coordinates of the pixel points in the boundary graph or not by scanning the coordinates of the pixel points in the current area and comparing the coordinates with the boundary graph of the pre-drawn camera area so as to judge whether the current scanning area is the camera area or not.
Specifically, in order to scan pixel points in a COD region and a non-COD region respectively, firstly, pixel points in the two regions are distinguished, if the currently scanned pixel point falls into a boundary graph of the COD region, namely the pixel point is judged to belong to the COD region, a driving chip utilizes a second voltage driving circuit to scan the pixel point; otherwise, the pixel point is judged to belong to the non-COD region, and the driving chip utilizes the first voltage driving circuit to scan the pixel point.
As an optional implementation manner, as shown in fig. 3, the same row of pixel points in the display region is divided into two time periods for scanning according to the region where the pixel points are located, and the pixel points in the non-camera region are scanned at a first preset time T1, at this time, a Gamma curve1 shown in fig. 5 and a Gamma h1/Gamma l1 shown in fig. 4 are called, and a corresponding first driving signal is output; scanning the pixel points in the camera area at a second preset time T2, calling the Gamma curve2 shown in fig. 8 and the Gamma h2/Gamma l2 shown in fig. 7, and outputting a corresponding second driving signal.
Example two
The present invention also provides a driving apparatus of an OLED device, as shown in fig. 3, including:
the first voltage driving circuit 3 includes a plurality of first scan lines (G2, G5 shown in fig. 3), and a pixel point located in the non-camera area 2 in each row of pixel points in the display area of the OLED device is correspondingly connected to one first scan line;
a second voltage driving circuit 4 including a plurality of second scanning lines (G1, G3, G4, G6 shown in fig. 3), wherein a pixel point located in the camera area 1 in each row of pixel points of the display area is correspondingly connected to one second scanning line;
the first voltage driving circuit and the second voltage driving circuit are used for providing different driving voltages.
Specifically, the first scan line and the second scan line in this embodiment use different driving curves to provide different driving voltages. The first scan line uses the first driving Curve LV1 shown in fig. 6, the second scan line uses the second driving Curve LV2 shown in fig. 9, and Gamma h1/Gamma l1 as the maximum/minimum value of Gamma voltage, and the maximum/minimum value is multiplied by Gamma Curve1 to obtain gray-scale node voltages of the first driving Curve, wherein each node voltage corresponds to a node brightness. And multiplying the Gamma 2/Gamma L2 Curve by the Gamma Curve2 Curve to obtain each gray-scale node voltage of the second driving Curve, wherein each node voltage corresponds to one node brightness.
In the embodiment of the invention, two sets of mutually independent voltage driving circuits are arranged in the driving chip to respectively provide the pixel points in the COD region and the non-COD region, wherein the first voltage driving circuit is used for scanning the pixel points in the non-COD region, and the second voltage driving circuit is used for scanning the pixel points in the COD region, so that the driving voltage provided for the pixel points in the COD region is greater than the driving voltage provided for the non-COD region, the brightness of a single pixel point in the COD region is increased, the consistency of the brightness of the COD region and the brightness of the non-COD region is ensured, and the display effect of the OLED device is improved.
As an alternative embodiment, as shown in fig. 10, the driving device further includes:
the storage module 5 is used for pre-storing the boundary graph of the camera area and the coordinates of pixel points in the boundary graph;
the judging module 6 is connected with the storage module 5 and used for comparing the coordinates of the currently scanned pixel points with the boundary graph before scanning the display area so as to judge whether the currently scanned pixel points are the pixel points of the camera area or not and output a judging result;
and the switching module 7 is respectively connected with the judging module 6, the first voltage driving circuit 3 and the second voltage driving circuit 4, and calls the corresponding voltage driving circuit to scan according to the judgment result output by the judging module 6.
Specifically, in order to scan pixel points in a COD region and a non-COD region respectively, the pixel points in the two regions are firstly distinguished, and if the judging module 6 judges that the currently scanned pixel point falls into the boundary graph of the COD region, that is, the pixel point belongs to the COD region, the switching module 7 scans the pixel point by using the second voltage driving circuit 4; otherwise, the pixel point is determined to belong to the non-COD region, and the switching module 7 switches to the first voltage driving circuit 3 to scan the pixel point.
As an optional implementation manner, the driving device further includes a timing module 8, connected to the switching module, and configured to perform timing during the display driving, where the pixels in the camera area and the pixels in the non-camera area in the same row of pixels are divided into two time periods to be scanned, the pixels in the non-camera area are scanned by using a first scan line at a first preset time T1, and the pixels in the camera area are scanned by using a second scan line at a second preset time T2.
Specifically, the same row of pixel points in the display area are divided into two time periods for scanning according to the area, the pixel points in the non-camera area are scanned at a first preset time T1, at this time, a Gamma curve1 shown in fig. 5 and a Gamma h1/Gamma l1 shown in fig. 4 are called, and corresponding first driving signals are output; scanning the pixel points in the camera area at a second preset time T2, calling the Gamma curve2 shown in fig. 8 and the Gamma h2/Gamma l2 shown in fig. 7, and outputting a corresponding second driving signal.
The embodiment of the invention has the beneficial effects that: the driving method and the driving device of the OLED device are provided, pixels in a camera area and a non-camera area of a display area of the OLED device are scanned respectively, different driving voltages are provided for the pixels in the two areas, accordingly, the brightness consistency of the camera area and the non-camera area is achieved, and the display effect of the OLED device is improved.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The driving method of the OLED device is characterized by comprising the steps of arranging two mutually independent voltage driving circuits in a driving chip of the OLED device in advance to provide different driving voltages; further comprising:
dividing a display area of the OLED device into a camera area and a non-camera area in advance, and judging that the currently scanned area is the camera area or the non-camera area before the drive chip scans the display area;
when the currently scanned area is judged to be the non-camera area, the driving chip calls a first voltage driving circuit to scan;
and when the currently scanned area is judged to be the camera area, the driving chip calls a second voltage driving circuit to scan.
2. The driving method according to claim 1, wherein before the driving chip scans the display area, a boundary graph of the camera area is pre-drawn and stored in the driving chip;
when the display area is scanned, the driving chip scans the coordinates of the pixel points in the current area, compares the coordinates with a boundary graph of the pre-drawn camera area, and judges whether the coordinates of the currently scanned pixel points are matched with the coordinates of the pixel points in the boundary graph, so as to judge whether the current scanning area is the camera area.
3. The driving method according to claim 1, wherein the pixels in the same row in the display region are scanned in two time periods according to the region, the pixels in the non-camera region are scanned at a first preset time, and the pixels in the camera region are scanned at a second preset time.
4. The driving method according to claim 1, wherein when the driver chip calls the first voltage driving circuit, the first voltage driving circuit outputs a corresponding first driving signal to the non-camera area according to the first driving curve;
and when the driving chip calls the second voltage driving circuit, the second voltage driving circuit outputs a corresponding second driving signal to the camera area according to the second driving curve.
5. The driving method according to claim 4, wherein the maximum node voltage output by the second driving curve is greater than the maximum node voltage output by the first driving curve.
6. A driving apparatus of an OLED device, comprising:
the first voltage driving circuit comprises a plurality of first scanning lines, and pixel points in each row of pixel points in the display area of the OLED device and located in the non-camera area are correspondingly connected with one first scanning line;
the second voltage driving circuit comprises a plurality of second scanning lines, and pixel points positioned in the camera area in each row of pixel points of the display area are correspondingly connected with one second scanning line;
the first voltage driving circuit and the second voltage driving circuit are used for providing different driving voltages.
7. The drive device according to claim 6, further comprising:
and the storage module is used for pre-storing the boundary graph of the camera area and the coordinates of the pixel points in the boundary graph.
8. The drive device according to claim 7, further comprising:
and the judging module is connected with the storage module and used for comparing the coordinates of the currently scanned pixel points with the boundary graph before scanning the display area so as to judge whether the currently scanned pixel points are the pixel points of the camera area or not and output a judging result.
9. The drive device according to claim 8, further comprising:
and the switching module is respectively connected with the judging module, the first voltage driving circuit and the second voltage driving circuit, and calls the corresponding voltage driving circuit to scan according to the judging result output by the judging module.
10. The drive device according to claim 9, further comprising:
and the timing module is connected with the switching module and used for timing during display driving, pixel points of the camera area and pixel points of the non-camera area in the same row of pixel points are divided into two time periods for scanning, the first scanning line is used for scanning the pixel points of the non-camera area at a first preset time, and the second scanning line is used for scanning the pixel points of the camera area at a second preset time.
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| CN212230037U (en) * | 2020-06-08 | 2020-12-25 | 昆山国显光电有限公司 | Display panel and display device |
| CN111768740A (en) * | 2020-06-17 | 2020-10-13 | 厦门天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN112382238A (en) * | 2020-12-03 | 2021-02-19 | 云谷（固安）科技有限公司 | Array substrate and display device |
| CN112562568A (en) * | 2020-12-23 | 2021-03-26 | 厦门天马微电子有限公司 | Display panel driving method, display panel and display device |
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