Liquid crystal display device and controlling method thereof

Abstract

A control method is for inputting a plurality of image frame data into a liquid crystal display device in order. The liquid crystal display device includes a plurality of light-emitting units as the backlighting and a display screen, and has a preset display mode reference. The display screen is divided into a plurality of display areas, and each image frame data has a plurality of area image frame data corresponding to each display area. The method includes an area image frame data comparison/judgment procedure and an area light-emitting unit control procedure. The area image frame data comparison/judgment procedure, which is applied to one display area, is to compare at least two area image frame data displayed in the display area at different timings so as to generate an area image display parameter, and then to determine whether the display area should perform an area synchronization flash control mode or not according to the area image display parameter and the display mode reference. If the area image frame data comparison/judgment procedure determines that the display area should perform the area synchronization flash control mode, the area light-emitting unit control procedure is to control the light-emitting unit corresponding to the display area to perform the area synchronization flash control mode.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will become more fully understood from the detailed description given herein below illustration only, and thus is not limitative of the present invention, and wherein:

FIG. 1 is a schematic diagram showing image frame data, which are inputted into a liquid crystal display device according to a preferred embodiment of the invention;

FIG. 2 is a schematic diagram showing image frame data, which are inputted into another liquid crystal display device according to the embodiment of the invention;

FIG. 3 is a flow chart showing the procedures of a control method of a liquid crystal display device according to a preferred embodiment of the invention;

FIG. 4 is a flow chart showing the steps of the control method of a liquid crystal display device according to the embodiment of the invention;

FIG. 5 is a flow chart showing the steps of another control method of a liquid crystal display device according to the embodiment of the invention;

FIG. 6 is a schematic diagram showing a liquid crystal display device according to a preferred embodiment of the invention;

FIG. 7 is a timing chart showing the control of the light-emitting units of the liquid crystal display device according to the embodiment of the invention, wherein L₂ and L₃ represent the timings for continuously lighting up the light-emitting units, and T_F represents an image frame data time;

FIG. 8 is a timing chart showing the another control of the light-emitting units of the liquid crystal display device according to the embodiment of the invention, wherein L₃ represents the timing for continuously lighting up the light-emitting unit, and T_F represents an image frame data time;

FIG. 9 is a timing chart showing yet another control of the light-emitting units of the liquid crystal display device according to the embodiment of the invention, wherein L₂ and L₃ represent the timings for performing the flash control mode having a frequency different from the writing frequency of the image frame data, and T_F represents an image frame data time; and

FIG. 10 is a timing chart showing still another control of the light-emitting units of the liquid crystal display device according to the embodiment of the invention, wherein L₃ represents the timing for performing the flash control mode having a frequency different from the writing frequency of the image frame data, and T_F represents an image frame data time.

Claims

1. A control method for inputting a plurality of image frame data into a liquid crystal display device in order, wherein the liquid crystal display device comprises a plurality of light-emitting units as a backlighting and a display screen, and has a preset display mode reference, the display screen is divided into a plurality of display areas, each of the display areas corresponds to one of the light-emitting units, and each of the image frame data includes a plurality of area image frame data respectively corresponding to the display areas, the method comprising: an area image frame data comparison/judgment procedure for comparing at least two of the area image frame data displayed in one of the display areas at different timings so as to generate an area image display parameter, and then determining whether the display area should perform an area synchronization flash control mode or not according to the area image display parameter and the display mode reference; andan area light-emitting unit control procedure for controlling the light-emitting unit corresponding to the display area to perform the area synchronization flash control mode if the area image frame data comparison/judgment procedure determines that the display area should perform the area synchronization flash control mode.

2. The method of claim 1, wherein when the display mode reference is an animation display mode reference and the area image display parameter is larger than the display mode reference, the area image frame data comparison/judgment procedure determines that the display area should perform the area synchronization flash control mode, and the display mode of the display area is an animation display mode.

3. The method of claim 1, wherein the area light-emitting unit control procedure performs the area synchronization flash control mode by controlling a luminance intensity of the light-emitting unit corresponding to the display area to present a periodical luminance waveform, and the periodical luminance waveform and a timing of the area image frame data written into the display area are synchronized with a phase difference.

4. The method of claim 3, wherein the phase difference is ranged from 0 to 360 degrees.

5. The method of claim 1, wherein the area light-emitting unit control procedure performs the area synchronization flash control mode by controlling luminance intensities of the light-emitting unit corresponding to the display area and another one of the light-emitting units corresponding to another one of the display areas adjacent to the display area to present a periodical luminance waveform, and the periodical luminance waveform and a timing of the area image frame data written into the display areas are synchronized with a phase difference.

6. The method of claim 5, wherein the phase difference is ranged from 0 to 360 degrees.

7. The method of claim 1, wherein the area light-emitting unit control procedure controls the light-emitting unit corresponding to the display area to perform a general luminance control mode if the area image frame data comparison/judgment procedure determines that the display area should not perform the area synchronization flash control mode.

8. The method of claim 1, wherein the two of the area image frame data are two sequentially inputted image frame data.

9. The method of claim 1, wherein the two of the area image frame data are two non-sequentially inputted image frame data.

10. The method of claim 1, wherein the display mode reference is modulated depending on a luminance.

11. The method of claim 10, wherein the luminance is a luminance of the liquid crystal display device, and the display mode reference increases as the luminance of the liquid crystal display device increases.

12. The method of claim 10, wherein the luminance is an environmental luminance, and the display mode reference increases as the environmental luminance decreases.

13. The method of claim 1, wherein the display mode reference is automatically adjusted by the liquid crystal display device or manually adjusted by a user.

14. A liquid crystal display device including a plurality of light-emitting units as a backlighting and a display screen, and having a preset display mode reference, wherein the display screen is divided into a plurality of display areas, each of the display areas corresponds to one of the light-emitting units, and each of the image frame data includes a plurality of area image frame data respectively corresponding to the display areas, the device comprising: an area image frame data comparison/judgment module for comparing at least two of the area image frame data displayed in one of the display areas at different timings so as to generate an area image display parameter, and then generating an area luminance control signal according to the area image display parameter and the display mode reference; andan area light-emitting unit control module electrically connected with the area image frame data comparison/judgment module for controlling at least the light-emitting unit corresponding to the display area to perform a luminance control mode according to the area luminance control signal.

15. The device of claim 14, wherein when the display mode reference is an animation display mode reference and the area image display parameter is larger than the display mode reference, the area image frame data comparison/judgment module determines that the display mode of the display area is an animation display mode.

16. The device of claim 15, wherein the luminance control mode is an area synchronization flash control mode for controlling a luminance intensity of the light-emitting unit corresponding to the display area to present a periodical luminance waveform, and the periodical luminance waveform and a timing of the area image frame data written into the display area are synchronized with a phase difference.

17. The device of claim 16, wherein the phase difference is ranged from 0 to 360 degrees.

18. The device of claim 15, wherein the luminance control mode is an area synchronization flash control mode for controlling luminance intensities of the light-emitting unit corresponding to the display area and another one of the light-emitting units corresponding to another one of the display areas adjacent to the display area to present a periodical luminance waveform, and the periodical luminance waveform and a timing of the area image frame data written into the display areas are synchronized with a phase difference.

19. The device of claim 18, wherein the phase difference is ranged from 0 to 360 degrees.

20. The device of claim 14, wherein the luminance control mode is a general luminance control mode.

21. The device of claim 14, wherein the two of the area image frame data are two sequentially inputted image frame data.

22. The device of claim 14, wherein the two of the area image frame data are two non-sequentially inputted image frame data.

23. The device of claim 14, wherein the display mode reference is modulated depending on a luminance.

24. The device of claim 23, wherein the luminance is a luminance of the liquid crystal display device, and the display mode reference increases as the luminance of the liquid crystal display device increases.

25. The device of claim 23, wherein the luminance is an environmental luminance, and the display mode reference increases as the environmental luminance decreases.

26. The device of claim 14, wherein the display mode reference is automatically adjusted by the liquid crystal display device or manually adjusted by a user.