LIQUID CRYSTAL DISPLAY DRIVING METHOD AND DRIVE DEVICE

Abstract

A liquid crystal display driving method provided includes the following steps: acquiring a current gray level value of a current frame image; determining a gray level of the current gray level value; if the current gray level value is the high gray level, then determining whether to perform an overvoltage driving according to a first gray level difference threshold value; if the current gray level value is the low gray level, then determining whether to perform the overvoltage driving according to a second gray level difference threshold value. The present invention can precisely determine whether to perform the overvoltage driving on the pixel electrode.

Claims

1. A liquid crystal display driving method, comprising the following steps: acquiring a gray level value of a current frame image of a pixel electrode of a liquid crystal display when the liquid crystal display is activated; determining a gray level of the current gray level value, the gray level including a high gray level and a low gray level; if the current gray level value is the high gray level, then determining whether to perform an overvoltage driving on the pixel electrode according to a first gray level difference threshold value which is predetermined; if the current gray level value is the low gray level, then determining whether to perform the overvoltage driving on the pixel electrode according to a second gray level difference threshold value which is predetermined, and the first gray level difference threshold value being less than the second gray level difference threshold value; wherein determining whether to perform the overvoltage driving on the pixel electrode according to the first gray level difference threshold value which is predetermined comprises: acquiring a first gray level difference value of the current frame image and a previous frame image; determining whether the first gray level difference value is larger than the first gray level difference threshold value; if the first gray level difference value is larger than the first gray level difference threshold value, then activating the overvoltage driving; wherein determining whether to perform the overvoltage driving on the pixel electrode according to the second gray level difference threshold value which is predetermined comprises: acquiring a second gray level difference value of the current frame image and the previous frame image; determining whether the second gray level difference value is larger than the second gray level difference threshold value; if the second gray level difference value is larger than the second gray level difference threshold value, then activating the overvoltage driving.

2. The liquid crystal display driving method of claim 1, wherein the first gray level difference value and the second gray level difference value each are an absolute value of a difference value between the current gray level value and the gray level value of the previous frame image.

3. The liquid crystal display driving method of claim 1, wherein a gray level range of the high gray level is integers from 128 to 255, a gray level range of the low gray level is integers from 0 to 127.

4. The liquid crystal display driving method of claim 1, wherein the second gray level difference threshold value is any integer among 4 to 6, the first gray level difference threshold value is any integer among 0 to 3.

5. A liquid crystal display driving method, comprising the following steps: acquiring a current gray level value of a current frame image of a pixel electrode frame image of a liquid crystal display when the liquid crystal display is activated; determining a gray level of the current gray level value, the gray level including a high gray level and a low gray level; if the current gray level value is the high gray level, then determining whether to perform an overvoltage driving on the pixel electrode according to a first gray level difference threshold value which is predetermined; and if the current gray level value being the low gray level, then determining whether to perform the overvoltage driving on the pixel electrode according to a second gray level difference threshold value which is predetermined, and the first gray level difference threshold value being less than the second gray level difference threshold value.

6. The liquid crystal display driving method of claim 5, wherein determining whether to perform the overvoltage driving on the pixel electrode according to the first gray level difference threshold value which is predetermined comprises: acquiring a first gray level difference value of the current frame image and a previous frame image; determining whether the first gray level difference value is larger than the first gray level difference threshold value; and if the first gray level difference value is larger than the first gray level difference threshold value, then activating the overvoltage driving.

7. The liquid crystal display driving method of claim 5, wherein determining whether to perform the overvoltage driving to the pixel electrode according to the second gray level difference threshold value which is predetermined comprises: acquiring a second gray level difference value of the current frame image and the previous frame image; and determining whether the second gray level difference value is larger than the second gray level difference threshold value; and if the second gray level difference value is larger than the second gray level difference threshold value, then activating the overvoltage driving.

8. The liquid crystal display driving method of claim 5, wherein the first gray level difference value and the second gray level difference value each are an absolute value of a difference value between the current gray level value and the gray level value of the previous frame image.

9. The liquid crystal display driving method of claim 5, wherein a gray level range of the high gray level is integers from 128 to 255, a gray level range of the low gray level is integers from 0 to 127.

10. The liquid crystal display driving method of claim 5, wherein the second gray level difference threshold value is any integer among 4 to 6, the first gray level difference threshold value is any integer among 0 to 3.

11. A liquid crystal display driving device, comprising: a gray level value acquiring module acquiring a gray level value of a current frame image of a pixel electrode of a liquid crystal display when the liquid crystal display is activated; a gray level determining module determining a gray level of the current gray level value, the gray level including a high gray level and a low gray level; a first driving module determining whether to perform an overvoltage driving on the pixel electrode according to a first gray level difference threshold value which is predetermined if the current gray level value is the high gray level; a second driving module determining whether to perform the overvoltage driving to the pixel electrode according to a second gray level difference threshold value which is predetermined if the current gray level value is the low gray level, and the first gray level difference threshold value being less than the second gray level difference threshold value.

12. The liquid crystal display driving device of claim 11, wherein the first driving module comprises: a first acquiring unit acquiring a first gray level difference value of the current frame image and a previous frame image; a first determining unit determining whether the first gray level difference value is larger than the first gray level difference threshold value; and a first activating unit activating the overvoltage driving if the first gray level difference value is larger than the first gray level difference threshold value.

13. The liquid crystal display driving device of claim 11, wherein the second driving module comprises: a second acquiring unit acquiring a second gray level difference value of the current frame image and the previous frame image; a second determining unit determining whether the second gray level difference value is larger than the second gray level difference threshold value; a second activating unit activating the overvoltage driving if the second gray level difference value is larger than the second gray level difference threshold value.

14. The liquid crystal display driving device of claim 11, wherein the first gray level difference value and the second gray level difference value each are an absolute value of a difference value between the current gray level value and the gray level value of the previous frame image.

15. The liquid crystal display driving device of claim 11, wherein a gray level range of the high gray level is integers from 128 to 255.

16. The liquid crystal display driving device of claim 11, wherein a gray level range of the low gray level is integers from 0 to 127.

17. The liquid crystal display driving device of claim 11, wherein the second gray level difference threshold value is any integer among 4 to 6.

18. The liquid crystal display driving device of claim 11, wherein the first gray level difference threshold value is any integer among 0 to 3.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0026] FIG. 1 illustrates a flowchart of a liquid crystal display driving method according to an embodiment of the present invention;

[0027] FIG. 2 illustrates a flowchart of determining whether to perform the overvoltage driving to the pixel electrode according to a first gray level difference threshold value which is predetermined according to the embodiment of the present invention;

[0028] FIG. 3 illustrates a flowchart of determining whether to perform the overvoltage driving to the pixel electrode according to a second gray level difference threshold value which is predetermined according to the embodiment of the present invention;

[0029] FIG. 4 illustrates a block diagram of a structure of a liquid crystal display driving device according to the embodiment of the present invention;

[0030] FIG. 5 illustrates a block diagram of a structure of a first driving module according to the embodiment of the present invention; and

[0031] FIG. 6 illustrates a block diagram of a structure of a second driving module according to the embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] To achieve the above-mentioned objects and effects, the techniques, measures, and structure of the present invention are illustrated in the figures and descriptions of preferred embodiments below.

[0033] Please refer to FIG. 1, which illustrates a flowchart of a liquid crystal display driving method according to an embodiment of the present invention. It can be seen from FIG. 1, a liquid crystal display driving method of the present invention includes the following steps:

[0034] Step S101: acquiring a gray level value of a current frame image of a pixel electrode of a liquid crystal display when the liquid crystal display is activated.

[0035] Step S102: determining a gray level of the current gray level value, the gray level including a high gray level and a low gray level.

[0036] Step S103: if the current gray level value is the high gray level, then determining whether to perform an overvoltage driving on the pixel electrode according to a first gray level difference threshold value which is predetermined.

[0037] Step S104: if the current gray level value is the low gray level, then determining whether to perform the overvoltage driving on the pixel electrode according to a second gray level difference threshold value which is predetermined, and the first gray level difference threshold value being less than the second gray level difference threshold value.

[0038] Please refer to FIG. 2, which illustrates a flowchart of determining whether to perform the overvoltage driving to the pixel electrode according to a first gray level difference threshold value which is predetermined according to the embodiment of the present invention. It can be seen from FIG. 2 that if the current gray level value is a high gray level, then determining whether to perform the overvoltage driving on the pixel electrode according to the first gray level difference threshold value which is predetermined specifically includes:

[0039] Step S201: acquiring a first gray level difference value of the current frame image and a previous frame image.

[0040] Step S202: determining whether the first gray level difference value is larger than the first gray level difference threshold value.

[0041] Step S203: if the first gray level difference value is larger than the first gray level difference threshold value, then activating the overvoltage driving.

[0042] Please refer to FIG. 3, which illustrates a flowchart of determining whether to perform the overvoltage driving on the pixel electrode according to a second gray level difference threshold value which is predetermined according to the embodiment of the present invention. It can be seen from FIG. 3, if the current gray level value is a low gray level, then determining whether to perform the overvoltage driving on the pixel electrode according to the second gray level difference threshold value which is predetermined specifically includes:

[0043] Step S301: acquiring a second gray level difference value of the current frame image and the previous frame image.

[0044] Step S302: determining whether the second gray level difference value is larger than the second gray level difference threshold value.

[0045] Step S303: if the second gray level difference value is larger than the second gray level difference threshold value, then activating the overvoltage driving.

[0046] In the present embodiment, the first gray level difference value and the second gray level difference value each are an absolute value of a difference value between the current gray level value and the gray level value of the previous frame image.

[0047] In the present embodiment, a gray level range of the high gray level are integers from 128 to 255, a gray level range of the low gray level are integers from 0 to 127.

[0048] In the present embodiment, the second gray level difference threshold value is any integer among 4 to 6, the first gray level difference threshold value is any integer among 0 to 3.

[0049] In the present embodiment, the first gray level difference threshold value is set to be less than the second gray level difference threshold value, due to human eye being more sensitive to a static performance of the low gray level, so the gray level difference threshold value for the low gray level is set to be larger, in order to prevent a fluctuation of the front-end data login from causing the overvoltage driving being incorrectly activated, resulting in an irregular display. The gray level difference threshold value for the high gray level can be set to be smaller, in order to increase the response speed of the entire system.

[0050] A liquid crystal display driving method of the present invention determines whether the gray level value of the current frame image of the pixel electrode is the high gray level or the low gray level, then acquires the first gray level difference value or the second gray level difference value of the current frame image and the previous frame image, then determines whether to perform the overvoltage driving on the pixel electrode according to the predetermined first gray level difference threshold value or second gray level difference threshold value, and precisely determines whether to perform the overvoltage driving on the pixel electrode, without the irregular image resulting from the overvoltage driving being activated incorrectly, and the response time of the pixel electrode being adversely affected.

[0051] Please refer to FIG. 4, which illustrates a block diagram of a structure of a liquid crystal display driving device according to the embodiment of the present invention. It can be seen from FIG. 4 that a liquid crystal display driving device of the present invention includes: a gray level value acquiring module 10, acquiring a gray level value of a current frame image of a pixel electrode when driving the liquid crystal display; a gray level determining module 20 determining a gray level of the current gray level value, the gray level including a high gray level and a low gray level; a first driving module 30 determining whether to perform an overvoltage driving on the pixel electrode according to a first gray level difference threshold value which is predetermined if the current gray level value is the high gray level; a second driving module 40 determining whether to perform the overvoltage driving on the pixel electrode according to a second gray level difference threshold value which is predetermined if the current gray level value is the low gray level, and the first gray level difference threshold value being less than the second gray level difference threshold value.

[0052] FIG. 5 illustrates a block diagram of a structure of the first driving module 30 according to the embodiment of the present invention. It can be seen from FIG. 5 that in the present embodiment the first driving module 30 includes: a first acquiring unit 301 acquiring a first gray level difference value of the current frame image and a previous frame image; a first determining unit 302, determining whether the first gray level difference value being larger than the first gray level difference threshold value; and a first activating unit 303 activating the overvoltage driving if the first gray level difference value is larger than the first gray level difference threshold value.

[0053] FIG. 6 illustrates a block diagram of a structure of a second driving module 40 according to the embodiment of the present invention. It can be seen from FIG. 6 that in the present embodiment the second driving module 40 includes: a second acquiring unit 401 acquiring a second gray level difference value of the current frame image and the previous frame image; a second determining unit 402 determining whether the second gray level difference value is larger than the second gray level difference threshold value; and a second activating unit 403, activating the overvoltage driving if the second gray level difference value is larger than the second gray level difference threshold value.

[0054] In the present embodiment, the first gray level difference value and the second gray level difference value each are an absolute value of a difference value between the current gray level value and the gray level value of the previous frame image.

[0055] A liquid crystal display drive device of the present invention acquires a current frame image and a previous frame image through determining whether the first gray level difference value or the second gray level difference value of the gray level value of the current frame image of the current frame image of the pixel electrode is high gray level or low gray level, then determines whether pixel electrode performs the overvoltage driving on the pixel electrode according to the predetermined first gray level difference threshold value or second gray level difference threshold value, and thus precisely determines whether it is necessary to perform the overvoltage driving on the pixel electrode without the irregular image resulting from the overvoltage driving being activated incorrectly, and the response time of the pixel electrode being adversely affected.

[0056] The foregoing preferred embodiments of the present invention are illustrative of the present invention rather than limiting of the present invention. It is intended to cover various modifications and changes included within the spirit and scope of the appended claims, the scope of which should be accorded the broadest interpretation so as to encompass all such modifications and similar structures.