DISPLAY PANEL AND ITS DRIVING METHOD AND DRIVING DEVICE

• US 20170148420A1
• Filed: 01/29/2016
• Published: 05/25/2017
• Est. Priority Date: 07/21/2015
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: ZHANG, Hao, SHI, Lingyun, DONG, Xue, LI, Yafei, GAO, Bo, WANG, Xiurong
• Granted Patent: US 10,657,861 B2
• Time in Patent Office: Days
• CPC Class Codes: G09G 2300/0408 Integration of the drivers onto the display substrate
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 2310/0205 Simultaneous scanning of several lines in flat panels
• CPC Class Codes: G09G 2310/0267 Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
• CPC Class Codes: G09G 2320/0613 The adjustment depending on the type of the information to be displayed
• CPC Class Codes: G09G 2320/103 Detection of image changes, e.g. determination of an index representative of the image change
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: G09G 2340/0435 Change or adaptation of the frame rate of the video stream
• CPC Class Codes: G09G 3/20 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

Abstract

A display panel and its driving method and driving device are provided for selectively reducing display resolution of a display panel, thereby decreasing display power consumption. The display panel comprises: gate lines (11) and data lines (12) disposed across to each other; at least one switching unit (13) connected between different gate lines (11), configured to control whether at least two rows of gate lines (11) are conducted; and a driving control module (14) having first output terminals (141) connected one by one to control terminals of the at least one switching unit (13) and second output terminals (142) connected one by one to input terminals of the data lines (12); wherein the driving control module (14) outputs, via the first output terminals (141), a control signal for controlling whether a corresponding switching unit (13) is switched on, and decides, based on an on/off state of the switching unit (13), whether to output an image signal to a corresponding data line (12) via the second output terminals (142).

Claims

1. A display panel, comprising:

gate lines and data lines disposed across to each other;

at least one switching unit connected between different gate lines and configured to control whether at least two rows of gate lines are conducted; and

a driving control module having first output terminals connected one by one to control terminals of the at least one switching unit and second output terminals connected one by one to input terminals of the data lines;

wherein the driving control module outputs, via the first output terminals, a control signal for controlling whether to switch on a corresponding switching unit, and decides, according to an on/off state of the switching unit, whether to output an image signal to a corresponding data line via the second output terminals.

2. The display panel according to claim 1, wherein a switching unit is provided between each pair of two adjacent rows of gate lines.

3. The display panel according to claim 2, wherein the switching unit is a thin film transistor, and for each thin film transistor, a source and a drain of the thin film transistor are connected respectively to two rows of gate lines adjacent to the thin film transistor, and a gate of the thin film transistor is connected to first output terminals of the driving control module.

4. The display panel according to claim 1, wherein the driving control module is configured to:

determine, based on a resolution of an image to be displayed which is transmitted by a signal source, a display mode to which the resolution of the image to be displayed corresponds; and

determine, based on the display mode, switching units that need to be switched on and switched off, output via the first output terminals a control signal for controlling whether to switch on a corresponding switching unit, and output via the second output terminals an image signal to a corresponding data line based on an on/off state of the switching unit.

5. The display panel according to claim 1, wherein the driving control module is further configured to:

receive a voltage signal of an image to be displayed which is transmitted by a signal source;

determine current image display mode based on the voltage signal of the image to be displayed of two adjacent frames; and

in a case where the image display mode is a static display mode, determine based on a resolution of the image to be displayed a switching unit that needs to be switched off, and output via the first output terminals a control signal for controlling a corresponding switching unit is to be switched on or switched off, and output via the second output terminals an image signal to a corresponding data line based on an on/off state of the switching unit.

6. The display panel according to claim 5, wherein the driving control module is further configured to:

in a case where the image display mode is a dynamic display mode, increase a frame frequency for image transmission.

7. A driving method for driving the display panel according to claim 1, comprising:

determining a resolution of an image to be displayed which is transmitted by a signal source;

determining a display mode to which the resolution of the image to be displayed corresponds; and

based on the display mode, determining switching units that need to be switched on and switched off, controlling each switching unit to be switched on or switched off, and controlling whether each data line outputs an image data.

9. The driving method according to claim 7, wherein

in a case where the resolution of the image to be displayed is greater than or equal to a maximum resolution of the display panel, the display mode to which the resolution of the image to be displayed corresponds is determined as an ultra-high-definition display mode;

in a case where the resolution of the image to be displayed is less than the maximum resolution of the display panel and greater than or equal to a half of the maximum resolution of the display panel, the display mode to which the resolution of the image to be displayed corresponds is determined as a full-high-definition display mode; and

in a case where the resolution of the image to be displayed is less than a half of the maximum resolution of the display panel and greater than or equal to one third of the maximum resolution of the display panel, the display mode to which the resolution of the image to be displayed corresponds is determined as a high-definition display mode.

14. The driving method according to claim 7, further comprising:

receiving a voltage signal of an image to be displayed which is transmitted by a signal source;

determining current image display mode based on the voltage signal of the image to be displayed of two adjacent frames; and

in a case where the image display mode is a static display mode, based on a resolution of the image to be displayed, determining a switching unit that needs to be switched off, and controlling each switching unit to be switched on or off, and outputting an image signal to a corresponding data line based on an on/off state of the switching unit.

18. A driving method for driving the display panel according to claim 1, comprising:

receiving a voltage signal of an image to be displayed which is transmitted by a signal source;

determining current image display mode based on a voltage signal of an image to be displayed of two adjacent frames; and

in a case where the image display mode is a static display mode, based on a resolution of the image to be displayed, determining a switching unit that needs to be switched off, controlling each switching unit to be switched on or switched off, and outputting an image signal to a corresponding data line based on an on/off state of the switching unit.

19. The driving method according to claim 18, further comprising:

in a case where the image display mode is a dynamic display mode, improving a frame frequency for image transmission.

20. The driving method according to claim 18, wherein

in a case where the voltage signal of the image to be displayed is the same with a voltage signal of an image displayed in a previous frame, determining the current image display mode as the static display mode;

in a case where the voltage signal of the image to be displayed is different from a voltage signal of an image displayed in a previous frame, determining the current image display mode as the dynamic display mode.

21. The driving method according to claim 18, wherein

in a case where the image display mode is the static display mode and the resolution of the image to be displayed is less than the maximum resolution of the display panel and greater than or equal to a half of the maximum resolution of the display panel, each switching unit is controlled to be switched off, and an image signal of the image to be displayed is transmitted to each data line;

in a case where the display mode is the static image display mode and the resolution of the image to be displayed is less than a half of the maximum resolution of the display panel and greater than or equal to one third of the maximum resolution of the display panel, each switching unit is controlled to be switched off, and an image signal of the image to be displayed is transmitted to each data line;

or, switching units in odd-numbered rows are controlled to be switched on and switching units in even-numbered rows are controlled to be switched off, and an image signal of the image to be displayed is transmitted to data lines in odd-numbered rows;

or, switching units in odd-numbered rows are controlled to be switched off and switching units in even-numbered rows are controlled to be switched on, and an image signal of the image to be displayed is transmitted to data lines in even-numbered rows.

22. A driving device for driving the display panel according to claim 1, comprising:

a first determining unit configured to determine a resolution of an image to be displayed which is transmitted by a signal source;

a second determining unit configured to determine a display mode to which the resolution of the image to be displayed corresponds; and

a first control unit configured to, based on the display mode, determine switching units that need to be switched on and switched off, and control each switching unit to be switched on or switched off and control whether each data line outputs an image data.

24. The driving device according to claim 22, wherein the second determining unit is configured to:

in a case where the resolution of the image to be displayed is greater than or equal to a maximum resolution of the display panel, determine that the display mode to which the resolution of the image to be displayed corresponds is an ultra-high-definition display mode;

in a case where the resolution of the image to be displayed is less than the maximum resolution of the display panel and greater than or equal to a half of the maximum resolution of the display panel, determine that the display mode to which the resolution of the image to be displayed corresponds is a full-high-definition display mode; and

in a case where the resolution of the image to be displayed is less than a half of the maximum resolution of the display panel and greater than or equal to one third of the maximum resolution of the display panel, determine that the display mode to which the resolution of the image to be displayed corresponds is a high-definition display mode.

29. The driving device according to claim 22, further comprising:

a receiving unit configured to receive a voltage signal of an image to be displayed which is transmitted by a signal source;

an image display mode determining unit configured to determine current image display mode based on a voltage signal of an image to be displayed of two adjacent frames; and

a second control unit configured to, in a case where the image display mode is a static display mode, based on a resolution of the image to be displayed, determine a switching unit that needs to be switched off and control each switching unit to be switched on or off, and output an image signal to a corresponding data line based on an on/off state of the switching unit.

33. A driving device for driving the display panel according to claim 1, comprising:

a receiving unit configured to receive a voltage signal of an image to be displayed which is transmitted by a signal source;

an image display mode determining unit configured to determine current image display mode based on a voltage signal of an image to be displayed of two adjacent frames; and

a second control unit configured to, in a case where the image display mode is a static display mode, based on a resolution of the image to be displayed, determine a switching unit that needs to be switched off, and output an image signal to a corresponding data line based on an on/off state of the switching unit.

34. The driving device according to claim 33, wherein the second control unit is further configured to:

in a case where the image display mode is a dynamic display mode, improve a frame frequency for image transmission.

35. The driving device according to claim 33, wherein the image display mode determining unit is configured to:

in a case where the voltage signal of the image to be displayed is the same with a voltage signal of an image displayed in a previous frame, determine the current image display mode as the static display mode; and

in a case where the voltage signal of the image to be displayed is different from a voltage signal of an image displayed in a previous frame, determine the current image display mode as the dynamic display mode.

36. The driving device according to claim 33, wherein the second control unit is configured to:

in a case where the image display mode is the static display mode, and the resolution of the image to be displayed is less than the maximum resolution of the display panel and greater than or equal to a half of the maximum resolution of the display panel, control each switching unit to be switched off, and transmit an image signal of the image to be displayed to each data line;

in a case where the display mode is the static image display mode, and the resolution of the image to be displayed is less than a half of the maximum resolution of the display panel and greater than or equal to one third of the maximum resolution of the display panel, control each switching unit to be switched off, and transmit an image signal of the image to be displayed to each data line;

or, control switching units in odd-numbered rows to be switched on and control switching units in even-numbered rows to be switched off, and transmit an image signal of the image to be displayed to data lines in odd-numbered rows;

or, control switching units in odd-numbered rows to be switched off and control switching units in even-numbered rows to be switched on, and an image signal of the image to be displayed is transmitted to data lines in even-numbered rows.

8. (canceled)

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