CN110379365B - Organic light-emitting display panel, display device and driving method - Google Patents
Organic light-emitting display panel, display device and driving method Download PDFInfo
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- CN110379365B CN110379365B CN201910662644.XA CN201910662644A CN110379365B CN 110379365 B CN110379365 B CN 110379365B CN 201910662644 A CN201910662644 A CN 201910662644A CN 110379365 B CN110379365 B CN 110379365B
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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]
Abstract
The invention discloses an organic light-emitting display panel, a display device and a driving method, which aim to solve the problems that the organic light-emitting display panel in the prior art has long light-emitting time of an organic light-emitting material, branded display pictures and short service life of the organic light-emitting display panel. The driving method of the organic light emitting display panel includes: scanning each pixel row line by line; when a current pixel row is scanned, controlling the current pixel row to display; the current row of pixels is turned off before the next row of pixels is scanned.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to an organic light emitting display panel, a display device, and a driving method.
Background
Organic Light-Emitting display (OLED) display refers to a phenomenon in which an Organic semiconductor material and a Light-Emitting material emit Light by carrier injection and recombination under electric field driving. The principle is that under the drive of a certain voltage, electrons and holes are respectively injected into an electron and hole transport layer from a cathode and an anode, the electrons and the holes respectively migrate to a luminescent layer through the electron and hole transport layer and meet in the luminescent layer to form excitons and excite luminescent molecules, and the latter emits visible light through radiation relaxation.
Referring to fig. 1, a schematic diagram of a display process of each pixel row in a frame of picture is shown, that is, a signal refresh mode of the OLED organic light emitting display panel in the prior art is signal refresh row by row, only when a signal of the same pixel row of a next frame comes, the content of the pixel row of the previous frame can be covered, and before refresh is not performed, the content of the pixel row of the previous frame is displayed all the time. That is, the organic light emitting material of each pixel unit in each pixel row has a problem of long light emitting time, and the long light emitting time of the organic light emitting material can reduce the service life of the organic light emitting display panel and cause the display image to have a burn-in phenomenon of residual image.
Disclosure of Invention
The invention provides an organic light-emitting display panel, a display device and a driving method, which aim to solve the problems that the organic light-emitting display panel in the prior art has long light-emitting time of an organic light-emitting material, branded display pictures and short service life of the organic light-emitting display panel.
The embodiment of the invention provides a driving method of an organic light-emitting display panel, which comprises the following steps:
scanning each pixel row line by line;
when a current pixel row is scanned, controlling the current pixel row to display;
the current row of pixels is turned off before the next row of pixels is scanned.
In one possible embodiment, the closing the current pixel row before scanning to the next pixel row includes:
and turning off the data signal of the current pixel row before the scanning signal of the current pixel row is cut off.
In a possible embodiment, the turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off includes:
turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off by increasing the duty ratio of the scan signal of the current pixel row.
In a possible embodiment, the turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off includes:
and turning off the data signal of the current pixel row before the scanning signal of the current pixel row is cut off by reducing the duty ratio of the data signal of the current pixel row.
In a possible embodiment, the turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off includes:
and turning off the data signal of the current pixel row before the scanning signal of the current pixel row is cut off by increasing the duty ratio of the scanning signal of the current pixel row and reducing the duty ratio of the data signal of the current pixel row.
In a possible embodiment, the turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off includes:
turning off the data signal of the current pixel row 1 to 3 microseconds before the scan signal of the current pixel row is turned off.
In one possible embodiment, the driving method further includes:
turning on the data signal of the current pixel row before the scan signal of the current pixel row is turned on.
In one possible embodiment, before scanning each pixel row line by line, the driving method further includes:
and controlling the display panel to perform refreshing display at a set frame frequency, wherein each frame only displays one row of pixel rows, and the set frame frequency is more than 1000.
The embodiment of the invention also provides an organic light-emitting display panel which is driven by the driving method provided by the embodiment of the invention, wherein the organic light-emitting display panel is an organic electroluminescent display panel or a micron self-luminous diode display panel.
The embodiment of the invention also provides a display device, which comprises the organic light-emitting display panel provided by the embodiment of the invention.
The embodiment of the invention has the following beneficial effects: the driving method of the organic light-emitting display panel provided by the embodiment of the invention comprises the following steps: scanning each pixel row line by line; when a current pixel row is scanned, controlling the current pixel row to display; before scanning the next pixel row, closing the current pixel row, namely, when the next pixel row is displayed, closing the previous pixel row, only one pixel row is displayed in the same time period, and the rest pixel rows are in a non-luminous dark state, so that the organic luminescent materials of all pixel units in the pixel rows are in a non-luminous state for most of the time, the service life of the organic luminescent materials can be prolonged, the service life of the organic luminescent display panel is prolonged, and the problem that the organic luminescent display panel is easy to burn in is solved.
Drawings
FIG. 1 is a schematic diagram illustrating a pixel row updating process of an organic light emitting display panel according to the prior art;
fig. 2 is a flowchart illustrating a driving method of an organic light emitting display panel according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a pixel row updating process of an organic light emitting display panel according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a driving method of an organic light emitting display panel according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating the early turn-off of a data signal by increasing the duty cycle of a scan signal according to an embodiment of the present invention;
fig. 6 is a schematic diagram of turning off a data signal in advance by reducing the duty cycle of the data signal according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.
Referring to fig. 2 and 3, an embodiment of the present invention provides a method of driving an organic light emitting display panel, including:
step S101, scanning each pixel row line by line.
And step S102, when the current pixel row is scanned, controlling the current pixel row to display.
Step S103, before scanning the next pixel row, closing the current pixel row.
The driving method of the organic light-emitting display panel provided by the embodiment of the invention comprises the following steps: scanning each pixel row line by line; when the current pixel row is scanned, controlling the current pixel row to display; before scanning the next row of pixel lines, closing the current pixel line, for example, the current pixel line is the nth row of pixel lines, when the nth row of pixel lines is scanned, controlling the nth row of pixel lines to display, and before the (N + 1) th row of pixel lines is scanned, closing the nth row of pixel lines, that is, when the next pixel line is displayed, closing the previous pixel line, only one row of pixel lines is displayed in the same time period, and the rest pixel lines are in a dark state without emitting light, so that the organic light emitting material of each pixel unit in the pixel line can be in a non-light emitting state most of the time, the service life of the organic light emitting material can be prolonged, the service life of the organic light emitting display panel can be prolonged, and the problem that the organic light emitting display panel is prone to burn-in can be improved.
In practical implementation, referring to fig. 4, before step S101, that is, before scanning each pixel row by row, the driving method further includes: step S100, controlling the display panel to perform refresh display at a set frame rate, where each frame only displays one row of pixel rows, and the set frame rate is greater than 1000. That is, as shown in the 7 panels in the scanning process shown in fig. 3, each panel can be displayed as a frame of display screen, and normal display is realized by increasing the update rate and updating only one row of pixel rows at a time, while the display time of each pixel row is shortened and the service life of the organic light emitting material is prolonged.
In specific implementation, referring to fig. 5, the gates and Data in fig. 5 are the scan signals and Data signals provided by the embodiment of the present invention, and the gates 0 and Data0 are the scan signals and Data signals of the prior art. For step S103, that is, closing the current pixel row before scanning the next pixel row, in this embodiment of the present invention, the method may specifically include: before the scan signal Gate of the current pixel row is turned off, the Data signal Data of the current pixel row is turned off. That is, in the embodiment of the present invention, the Data signal Data can be turned off in advance before the scan signal Gate is turned off, and further, the state of the scan signal Gate can be adjusted to achieve the following state: when the Gate high potential is converted into the low potential, the Data signal Data is already at the low potential, the charges in the fixed Pixel are in the low potential state, at this time, the Pixel unit Pixel is converted into the dark state until the next Gate updates the Pixel charge potential, and further, the previous Pixel row is closed before the next Pixel row is displayed. In the prior art, when the Gate high voltage level is changed to the low voltage level, the Data signal Data is still at the high voltage level, the charges in the fixed Pixel will be at the high voltage level, and the Pixel unit Pixel will light up until the next Gate update the Pixel charge voltage, and then the Pixel unit in the prior art will be in the light-emitting state before the next frame update, and the light-emitting time is long.
In a specific implementation, as shown in fig. 5, for turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off, the method specifically includes: by increasing the duty ratio of the scan signal of the current pixel row, that is, compared to the data signal of the related art, the embodiment of the present invention increases the effective period of the scan signal Gate to turn off the data signal of the current pixel row before the scan signal of the current pixel row is turned off.
In addition, in a specific implementation, as shown in fig. 6, the turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off may specifically include: by reducing the duty ratio of the Data signal Data of the current pixel row, that is, compared with the Data signal of the prior art, the embodiment of the invention reduces the effective period of the Data signal Data to turn off the Data signal Data of the current pixel row before the scan signal Gate of the current pixel row is turned off.
In a specific implementation, for turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off, the method may specifically include: the duty ratio of the scanning signal of the current pixel row is increased, and the duty ratio of the data signal of the current pixel row is reduced, so that the data signal of the current pixel row is closed before the scanning signal of the current pixel row is cut off.
In a specific implementation, turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off includes: and turning off the data signal of the current pixel row 1-3 microseconds before the scanning signal of the current pixel row is turned off. In the embodiment of the invention, the data signal of the current pixel row is closed 1-3 microseconds before the scanning signal of the current pixel row is cut off, so that the problems that the writing of the data signal is influenced because the early closing time of the data signal is too long and the previous row of pixels cannot be turned off before the next row of pixels is displayed because the early closing time of the data signal is too short can be avoided.
In practical implementation, as shown in fig. 5 and 6, the driving method further includes:
before the scan signal Gate of the current pixel row is turned on, the Data signal Data of the current pixel row is turned on.
The embodiment of the invention also provides an organic light-emitting display panel which is driven by the driving method provided by the embodiment of the invention, wherein the organic light-emitting display panel is an organic electroluminescent display panel or a micron self-luminous diode display panel.
The embodiment of the invention also provides a display device, which comprises the organic light-emitting display panel provided by the embodiment of the invention.
The embodiment of the invention has the following beneficial effects: the driving method of the organic light-emitting display panel provided by the embodiment of the invention comprises the following steps: scanning each pixel row line by line; when the current pixel row is scanned, controlling the current pixel row to display; before scanning the next pixel row, closing the current pixel row, namely, when the next pixel row is displayed, closing the previous pixel row, only one pixel row is displayed in the same time period, and the rest pixel rows are in a non-luminous dark state, so that the organic luminescent materials of all pixel units in the pixel rows are in a non-luminous state for most of the time, the service life of the organic luminescent materials can be prolonged, the service life of the organic luminescent display panel is prolonged, and the problem that the organic luminescent display panel is easy to burn in is solved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A method of driving an organic light emitting display panel, comprising:
scanning each pixel row line by line;
when a current pixel row is scanned, controlling the current pixel row to display;
closing the current pixel row before scanning to a next pixel row;
the closing the current pixel row before scanning the next pixel row comprises:
and turning off the data signal of the current pixel row before the scanning signal of the current pixel row is cut off.
2. The driving method as claimed in claim 1, wherein said turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off comprises:
turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off by increasing the duty ratio of the scan signal of the current pixel row.
3. The driving method as claimed in claim 1, wherein said turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off comprises:
and turning off the data signal of the current pixel row before the scanning signal of the current pixel row is cut off by reducing the duty ratio of the data signal of the current pixel row.
4. The driving method as claimed in claim 1, wherein said turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off comprises:
and turning off the data signal of the current pixel row before the scanning signal of the current pixel row is cut off by increasing the duty ratio of the scanning signal of the current pixel row and reducing the duty ratio of the data signal of the current pixel row.
5. The driving method as claimed in claim 1, wherein said turning off the data signal of the current pixel row before the scan signal of the current pixel row is turned off comprises:
turning off the data signal of the current pixel row 1 to 3 microseconds before the scan signal of the current pixel row is turned off.
6. The driving method according to claim 1, further comprising:
turning on the data signal of the current pixel row before the scan signal of the current pixel row is turned on.
7. The driving method according to claim 1, wherein before controlling the display of the current row of pixels, the driving method further comprises:
and controlling the display panel to perform refreshing display at a set frame frequency, wherein each frame only displays one row of pixel rows, and the set frame frequency is more than 1000.
8. An organic light emitting display panel driven by the driving method according to any one of claims 1 to 7, wherein the organic light emitting display panel is an organic electroluminescence display panel or a micrometer type self-light emitting diode display panel.
9. A display device characterized by comprising the organic light-emitting display panel according to claim 8.
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| EP1434193A4 (en) * | 2001-09-07 | 2009-03-25 | Panasonic Corp | El display, el display driving circuit and image display |
| WO2003027998A1 (en) * | 2001-09-25 | 2003-04-03 | Matsushita Electric Industrial Co., Ltd. | El display panel and el display apparatus comprising it |
| JP3627710B2 (en) * | 2002-02-14 | 2005-03-09 | セイコーエプソン株式会社 | Display drive circuit, display panel, display device, and display drive method |
| JP4610843B2 (en) * | 2002-06-20 | 2011-01-12 | カシオ計算機株式会社 | Display device and driving method of display device |
| JP2005236513A (en) * | 2004-02-18 | 2005-09-02 | Fujinon Corp | Imaging apparatus |
| CN102034426B (en) * | 2009-09-28 | 2012-11-21 | 上海天马微电子有限公司 | Organic light-emitting display and driving method |
| CN102054428A (en) * | 2009-11-05 | 2011-05-11 | 宏碁股份有限公司 | Organic light-emitting diode (OLED) display as well as driving method and pixel unit thereof |
| JP5577719B2 (en) * | 2010-01-28 | 2014-08-27 | ソニー株式会社 | Display device, driving method thereof, and electronic apparatus |
| JP5756866B2 (en) * | 2011-11-24 | 2015-07-29 | 株式会社Ｊｏｌｅｄ | Display device and control method thereof |
| CN102568416A (en) * | 2011-12-21 | 2012-07-11 | 深圳市国显科技有限公司 | Method for alleviating smears of middle-size liquid crystal display |
| CN202615755U (en) * | 2012-03-22 | 2012-12-19 | 信利半导体有限公司 | Pixel unit drive circuit capable of prolonging service lifetime of AMOLED panel |
| CN203179469U (en) * | 2013-01-08 | 2013-09-04 | 深圳市易事达电子股份有限公司 | LED panel scanning line blanking circuit |
| KR102317174B1 (en) * | 2015-01-22 | 2021-10-25 | 삼성디스플레이 주식회사 | Display device and driving method of the same |
| CN108735158B (en) * | 2017-04-25 | 2022-02-11 | 昆山国显光电有限公司 | Image display method and device and electronic equipment |
| CN109509430B (en) * | 2017-09-15 | 2020-07-28 | 京东方科技集团股份有限公司 | Pixel driving circuit and method and display device |
| CN108492783B (en) * | 2018-03-29 | 2020-12-22 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving circuit of AMOLED display device and driving method of AMOLED display device |
| CN108962145B (en) * | 2018-06-29 | 2021-03-23 | 北京大学深圳研究生院 | Display device, pixel circuit and driving method thereof |
| CN109036279B (en) * | 2018-10-18 | 2020-04-17 | 京东方科技集团股份有限公司 | Array substrate, driving method, organic light emitting display panel and display device |
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