PRESET REVERSE DRIVE METHOD APPLIED IN VIDEO DISPLAYING PROCESS

• US 20200312227A1
• Filed: 04/13/2018
• Published: 10/01/2020
• Est. Priority Date: 05/23/2017
• Status: Active Grant

• Current Assignee: TCL Technology Group Corp.
• Original Assignee: TCL Technology Group Corp.
• Inventors: XIANG, Chaoyu, LI, Le, QIAN, Lei, YANG, Yixing, CAO, Weiran
• Granted Patent: US 10,977,986 B2
• Time in Patent Office: Days
• CPC Class Codes: G09G 2300/0823 used to establish symmetry in driving, e.g. with polarity inversion
• CPC Class Codes: G09G 2310/0259 with use of an analog or digital ramp generator in the column driver or in the pixel circuit
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2320/0204 Compensation of DC component across the pixels in flat panels
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]

Abstract

Disclosed in the present disclosure is a preconfigured reverse drive method applied in a video displaying process. The method comprises the steps of: pre-obtaining display content of several frames behind lit pixels in a video by means of content loading; and adding a reverse drive signal before each forward drive signal used for driving the display content of the several frames, to suppress electric charge concentration on pixel in a video display panel in advance. The reverse drive signal changes the potential barrier of the detect potential well, removes electric charges confined and concentrated in the potential well, and reduces the density of confined electric charges. Thus, the video display brightness is improved, and the service life of the video display panel is prolonged.

Claims

1. A reverse driving method for a video displaying process, comprising:

pre-acquiring display content of a plurality of later frames for one or more pixels in a video by content loading; and

adding a reverse driving signal to each forward driving signal for driving the one or more pixels, to suppress accumulation of electric charges on the one or more pixels in a video display panel in advance.

2. The reverse driving method for a video displaying process according to claim 1, wherein an intensity of the reverse driving signal is proportional to an intensity of the forward driving signal.

3. The reverse driving method for a video displaying process according to claim 1, wherein the reverse driving signal is one of:

a reverse voltage signal, a reverse current signal, or an alternation of the reverse voltage signal and the reverse current signal.

4. The reverse driving method for a video display process according to claim 3, wherein the reverse voltage signal is lower than a breakdown voltage of the video display panel.

5. The reverse driving method for a video displaying process according to claim 3, wherein the reverse current signal is lower than a breakdown current of the video display panel.

6. The reverse driving method for a video displaying process according to claim 3, wherein a waveform of the reverse driving signal includes one or more of:

a square wave, a triangular wave, a ramp wave, and a sine wave.

7. The reverse driving method for a video displaying process according to claim 3, wherein the reverse driving signal and the forward driving signal constitute a driving cycle, the reverse driving signal is an alternation of the reverse voltage signal and the reverse current signal, and a sum of a time duration for the reverse voltage signal and a time duration for the reverse current signal is 1% to 99% of the driving cycle.

8. The reverse driving method for a video displaying process according to claim 7, wherein the reverse driving signal and the forward driving signal constitute a driving cycle, the reverse driving signal is an alternation of the reverse voltage signal and the reverse current signal, and the sum of the time duration for the reverse voltage signal and the time duration for the reverse current signal is 10% to 60% of the driving cycle.

9. The reverse driving method for a video displaying process according to claim 3, wherein the reverse driving signal and the forward driving signal constitute a driving cycle, the reverse driving signal is a reverse voltage signal , a time duration for the reverse voltage signal is 1% to 99% of the driving cycle, a frequency of the reverse voltage signal is not less than 60 Hz, and an amplitude of the reverse voltage signal is −

0.1V to −

10V.

10. The reverse driving method for a video displaying process according to claim 3, wherein the reverse driving signal and the forward driving signal constitute a driving cycle, the reverse driving signal is a reverse voltage signal, a time duration for the reverse voltage signal is 10% to 60% of the driving cycle, a frequency of the reverse voltage signal is 60 Hz to 240 Hz, and an amplitude of the reverse voltage signal is −

1V to −

5V.

11. The reverse driving method for a video displaying process according to claim 3, wherein the reverse driving signal and the forward driving signal constitute a driving cycle, the reverse driving signal is a reverse current signal, a time duration for the reverse current is 1% to 99% of the driving cycle, a frequency of the reverse current signal is not less than 60 Hz, and an amplitude of the reverse current signal is −

0.0001 Am/cm<sup>−

2</sup> to −

1 Am/cm<sup>−

2</sup>.

12. The reverse driving method for a video displaying process according to claim 3, wherein the reverse driving signal and the forward driving signal constitute a driving cycle, the reverse driving signal is a reverse current signal, a time duration for the reverse current signal is 10% to 60% of the driving cycle, a frequency of the reverse current signal is 60 Hz to 240 Hz, and an amplitude of the reverse current signal is −

0.0001 Am/cm<sup>−

2</sup> to −

0.1 Am/cm<sup>−

2</sup>.

13. The reverse driving method for a video displaying process according to claim 1, wherein a vacant driving signal is in the reverse driving signal.

14. The reverse driving method for a video displaying process according to claim 13, wherein the reverse driving signal, the forward driving signal and the vacant driving signal constitute a driving cycle, and a time duration for the vacant driving signal is 0% to 15% of the driving cycle.

15. The reverse driving method for a video displaying process according to claim 13, wherein the reverse drive signal, the forward drive signal and the vacant drive signal constitute a drive cycle, the reverse driving signal is an alternation of a reverse voltage signal and a reverse current signal, a sum of a time duration for the reverse voltage signal and a time duration for the reverse current signal is 1% to 99% of the driving cycle.

16. The reverse driving method for a video displaying process according to claim 13, wherein the reverse driving signal, the forward driving signal and the vacant driving signal constitute a driving cycle, the reverse driving signal is an alternation of a reverse voltage signal and a reverse current signal, a sum of a time duration for the reverse voltage signal and a time duration for the reverse current signal is 10% to 60% of the driving cycle.

17. The reverse driving method for a video displaying process according to claim 13, wherein the reverse driving signal, forward driving signal and vacant driving signal constitute a driving cycle, the reverse driving signal is a reverse voltage signal, a time duration for the reverse voltage signal is 1% to 99% of the driving cycle, a frequency of the reverse voltage signal is not less than 60 Hz, and an amplitude of the reverse voltage signal is −

0.1V to −

10V.

18. The reverse driving method for a video displaying process according to claim 13, wherein the reverse driving signal, the forward driving signal and the vacant driving signal constitute a driving cycle, the reverse driving signal is a reverse voltage signal, a time duration for the reverse voltage signal is 10% to 60% of the driving cycle, a frequency of the reverse voltage signal is 60 Hz to 240 Hz, and an amplitude of the reverse voltage signal is −

1V to −

5V.

19. The reverse driving method for a video displaying process according to claim 13, wherein the reverse driving signal, forward driving signal and vacant driving signal constitute a driving cycle, the reverse driving signal is a reverse current signal, a time duration for the reverse current signal is 1% to 99% of the driving cycle, a frequency of the reverse current signal is not less than 60 Hz, and an amplitude of the reverse current signal is −

0.0001 Am/cm<sup>−

2</sup> to −

1 Am/cm<sup>−

2</sup>.

20. The reverse driving method for a video displaying process according to claim 13, wherein the reverse driving signal, the forward driving signal and the vacant driving signal constitute a driving cycle, the reverse driving signal is a reverse current signal, a time duration for the reverse current signal is 10% to 60% of the driving cycle, a frequency of the reverse current signal is 60 Hz to 240 Hz, and an amplitude of the reverse current signal is −

0.0001 Am/cm<sup>−

2</sup> to −

0.1 Am/cm<sup>−

2</sup>.