Driving circuit and driving method for display panel and display device

• US 10,991,331 B2
• Filed: 12/06/2018
• Issued: 04/27/2021
• Est. Priority Date: 10/31/2018
• Status: Active Grant

• Current Assignee: HKC Corporation Limited (Shenzhen Huike Investment Holding Co., Ltd.)
• Original Assignee: HKC Corporation Limited (Shenzhen Huike Investment Holding Co., Ltd.)
• Inventors: Ji, Feilin
• Primary Examiner(s): Chang, Kent W
• Assistant Examiner(s): Au, Scott D
• Application Number:
  US16/314,645
• Publication Number:
  US 20200135130A1
• Time in Patent Office: 873 Days
• CPC Class Codes: G09G 2310/0264 Details of driving circuits
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2330/06 Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
• CPC Class Codes: G09G 3/3266 Details of drivers for scan electrodes
• CPC Class Codes: G09G 3/3677 suitable for active matrices only

Abstract

The present disclosure provides a driving circuit and driving method for a display panel and a display device, an output scanning signal is controlled through a scanning signal control circuit, such that a first-array-substrate-row driving circuit on a first lateral side of the display panel outputs a scanning signal according to a first enabling control signal, and a second-array-substrate-row driving circuit on a second lateral side of the display panel outputs a scanning signal according to a second enabling control signal, and driving of one side or two sides of the display panel is implemented.

Claims

1. A driving circuit for a display panel, wherein a first lateral side of the display panel is provided with a first scanning signal end, a second lateral side of the display panel is provided with a second scanning signal end, and the driving circuit comprises:

a scanning-signal-control circuit configured to output a first enabling control signal, a second enabling control signal and a scanning signal according to a control instruction as input by a user, wherein the control instruction comprises a first control instruction and a second control instruction;

a first-array-substrate-row driving circuit configured to output the scanning signal to the first scanning signal end under control of the first enabling signal; and

a second-array-substrate-row driving circuit configured to output the scanning signal to the second scanning signal end under control of the second enabling control signal;

wherein the scanning-signal-control circuit comprises;

a screen driving board configured to receive a video signal and output a start control logic signal, a scanning clock logic signal, a low frequency logic signal and an enabling control logic signal according to the video signal;

a level conversion circuit configured to receive the start control logic signal, the scanning clock logic signal, the low frequency logic signal and the enabling control logic signal, and to output an enabling control signal according to the enabling control logic signal, to output a first low frequency clock signal and a second low frequency clock signal according to the low frequency logic signal, and to output the scanning signal according to the scanning clock logic signal;

wherein the scanning signal comprise N-level scanning signals, and wherein N is greater than or equal to 1, and N is a positive integer;

wherein the screen driving board is provided with a GIPO (General Purpose Input and Output) which is configured to output an enabling control logic signal to the level conversion circuit, the level conversion circuit is provided with a low frequency signal port configured to convert the enabling control logic signal into an enabling control signal, this enabling control signal includes a high level signal and a low level signal;

a power management circuit configured to provide power supply to the screen driving board and the level conversion circuit respectively, wherein the power management circuit is respectively connected with the screen driving board and the level conversion circuit;

a first pull-up circuit configured to receive the enabling control signal and output a first enabling control signal according to the first control instruction and the enabling control signal;

wherein an input of the first pull-up circuit is connected with an enabling control signal output of the level conversion circuit, and an output of the first pull-up circuit is connected with a first enabling control signal input of the display panel; and

a second pull-up circuit configured to receive the enabling control signal and output a second enabling control signal according to the second control instruction and the enabling control signal;

wherein an input of the second pull-up circuit is connected with an enabling control signal output of the level conversion circuit, and an output of the second pull-up circuit is connected with a second enabling control signal input of the display panel.

2. The driving circuit of the display panel according to claim 1, wherein the first pull-up circuit is a first switch, and the first switch is configured to be turned on or off according to the first control instruction;

a first end of the first switch serves as the input of the first pull-up circuit, and a second end of the first switch serves as the output of the first pull-up circuit.

3. The driving circuit of the display panel according to claim 2, wherein the first switch is an electronic switching transistor, a control end of the electronic switching transistor serves as the first end of the first switch, and a current output of the electronic switching transistor serves as the second end of the first switching transistor.

4. The driving circuit of the display panel according to claim 2, wherein the first switch is turned n when the first control instruction is a high level signal, the first switch is turned off when the first control instruction is a low level signal.

5. The driving circuit for the display panel according to claim 2, wherein turning off the first switch is implemented by welding a resistance between an enabling control signal input of the first-array-substrate-row driving circuit and an enabling control signal output of the level conversion circuit.

6. The driving circuit for the display panel according to claim 2, wherein the first control instruction is an instruction of turning off the first switch, at this moment, the first switch is Mined on and the first-array-substrate-row driving circuit receives the first enabling control signal;

when the first enabling control signal is a high level signal, the first-array-substrate-row driving circuit outputs a scanning signal, when the first enabling control signal is a low level signal, the first-array-substrate-row driving circuit stops outputting the scanning signal.

7. The driving circuit of the display panel according to claim 1, wherein the second pull-up circuit is a second switch, and the second switch is configured to be turned on or off according to the second control instruction;

a first end of the second switch serves as an input of the second pull-up circuit, and a second end of the second switch serves as an output of the second pull-up circuit.

8. The driving circuit of the display panel according to claim 7, wherein the second switch is an electronic switching transistor, a control end of the electronic switching transistor serves as the first end of the second switch, and a current output of the electronic switching transistor serves as the second end of the second switching transistor.

9. The driving circuit of the display panel according to claim 8, wherein the electronic switching transistor is an N-type thin film crystal field effect transistor;

a drain electrode of the N-type thin film crystal field-effect transistor is an input of the electronic switching transistor, a source electrode of the N-type thin-film crystal field effect transistor is an output of the electronic switching transistor, and a grid electrode of the N-type thin-film crystal field effect transistor is a control end of the electronic switching transistor.

10. The driving circuit of the display panel according to claim 8, wherein the electronic switching transistor is any one of a group consisting of a polycrystalline silicon thin film transistor, an amorphous silicon thin film transistor, a zinc oxide-based thin film transistor and an organic thin film transistor.

11. The driving circuit of the display panel according to claim 7, wherein the second control instruction is an instruction of turning off the second switch;

at this moment, the second switch is turned on, the second-array-substrate-row driving circuit receives the second enabling control signal;

when the second enabling control signal is a high level signal, the second-array-substrate-row driving circuit outputs the scanning signal;

when the second enabling control signal is a low level signal, the second-array-substrate-row driving circuit stops outputting the scanning signal.

12. The driving circuit for the display panel according to claim 7, wherein turning off the second switch is implemented by welding a resistance between an enabling control signal input of the second-array-substrate-row driving circuit and an enabling control signal output of the level conversion circuit.

13. The driving circuit of the display panel according to claim 1, wherein the display panel comprises N rows of pixels and N scanning lines, a first end of each of the N scanning lines is connected with the first scanning signal end, and a second end of each of the N scanning lines is connected with the second scanning signal end;

wherein each row of the pixels are connected with the corresponding scanning line, N is greater than or equal to 1, and N is a positive integer;

the N scanning lines are configured to receive the N-level scanning signals, wherein the X-level scanning signal is configured to drive the X-th row of pixels on the display panel, N is greater than or equal to X, X is greater than or equal to 1, and X is a positive integer.

14. The driving circuit for the display panel according to claim 1, wherein when the first enabling control signal is a high level signal, at this time, the first-array-substrate-row driving circuit outputs a scanning signal, when the first enabling control signal is a low level signal, at this time, the first-array-substrate-row driving circuit stops outputting the scanning signal.

15. A display device, comprising:

a display panel, wherein a first lateral side of the display panel is provided with a first scanning signal end, and a second lateral side of the display panel is provided with a second scanning signal end; and

a control circuit, wherein the control circuit comprises;

a scanning-signal-control circuit configured to output a first enabling control signal, a second enabling control signal and a scanning signal according to a control instruction as input by a user, wherein the control instruction comprises a first control instruction and a second control instruction;

a first-array-substrate-row driving circuit configured to output the scanning signal to the first scanning signal end under control of the first enabling signal; and

a second-array-substrate-row driving circuit configured to output the scanning signal to the second scanning signal end under control of the second enabling control signal;

wherein the scanning-signal-control circuit comprises;

a screen driving board configured to receive a video signal and output a start control logic signal, a scanning clock logic signal, a low frequency logic signal and an enabling control logic signal according to the video signal;

a level conversion circuit configured to receive the start control logic signal, the scanning clock logic signal, the low frequency logic signal and the enabling control logic signal, and to output an enabling control signal according to the enabling control logic signal, to output a first low frequency clock signal and a second low frequency clock signal according to the low frequency logic signal, and to output the scanning signal according to the scanning clock logic signal;

wherein the scanning signal comprise N-level scanning signals, and wherein N is greater than or equal to 1, and N is a positive integer;

wherein the screen driving board is provided with a GIPO (General Purpose Input and Output) which is configured to output an enabling control logic signal to the level conversion circuit, the level conversion circuit is provided with a low frequency signal port configured to convert the enabling control logic signal into an enabling control signal, this enabling control signal includes a high level signal and a low level signal;

a power management circuit configured to provide power supply to the scree driving board and the level conversion circuit respectively, wherein the power management circuit is respectively connected with the screen driving board and the level conversion circuit;

a first pull-up circuit configured to receive the enabling control signal and output a first enabling control signal according to the first control instruction and the enabling control signal;

wherein an input of the first pull-up circuit is connected with an enabling control signal output of the level conversion circuit, and an output of the first pull-up circuit is connected with a first enabling control signal input of the display panel; and

a second pull-up circuit configured to receive the enabling control signal and output a second enabling control signal according to the second control instruction and the enabling control signal;

wherein an input of the second pull-up circuit is connected with an enabling control signal output of the level conversion circuit, and an output of the second pull-up circuit is connected with a second enabling control signal input of the display panel.

16. The display device according to claim 15, wherein the first pull-up circuit is a first switch, and the first switch is configured to be turned on or off according to the first control instruction;

a first end of the first switch serves as the input of the first pull-up circuit, and a second end of the first switch serves as the output of the first pull-up circuit.