IMAGE SIGNAL PROCESSING METHOD AND SYSTEM, AND DISPLAY

• US 20160249030A1
• Filed: 09/05/2014
• Published: 08/25/2016
• Est. Priority Date: 04/08/2014
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Masuyama, Katsuhiro
• Granted Patent: US 9,648,294 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04N 1/6088 by viewing conditions, i.e. conditions at picture output
• CPC Class Codes: H04N 5/20 Circuitry for controlling amplitude response
• CPC Class Codes: H04N 5/58 in dependence upon ambient light
• CPC Class Codes: H04N 9/64 Circuits for processing colour signals H04N9/77 takes precedence; camera processing pipelines for processing colour signals H04N23/84
• CPC Class Codes: H04N 9/643 Hue control means, e.g. flesh tone control
• CPC Class Codes: H04N 9/68 for controlling the amplitude of colour signals, e.g. automatic chroma control circuits H04N9/71, H04N9/73 take precedence; camera processing pipelines for controlling the colour saturation of colour signals H04N23/86

Abstract

An image signal processing method, an image signal processing system, and a display are disclosed in the embodiments of the present invention. The method comprises: receiving a video signal; acquiring environmental parameter information of a display environment; adjusting, based on the environmental parameter information, a luminance and/or a chrominance of the video signal such that light of at least one spectral color generated by the video signal is adjusted accordingly; and outputting the adjusted video signal. With the image signal processing method according to the embodiments of the present invention, light of a particular spectral color can be adjusted based on a viewing environment so as to alleviate visual fatigue.

Claims

1. An image signal processing method comprising steps of:

receiving a video signal;

acquiring environmental parameter information of a display environment;

adjusting, based on the environmental parameter information, a luminance and/or a chrominance of the video signal such that light of at least one spectral color generated by the video signal is adjusted accordingly; and

outputting the adjusted video signal.

2. The image signal processing method of claim 1, wherein:

the step of adjusting, based on the environmental parameter information, comprises adjusting the chrominance of the video signal and comprises steps of;

converting the video signal with a color matrix;

detecting an amplitude of a portion of the video signal corresponding to a spectral color to obtain a corresponding amplitude detection value;

obtaining an amplitude adjustment value of the portion of the video signal corresponding to the spectral color according to the environmental parameter information;

compensating the amplitude adjustment value according to an algebraic sum of the amplitude detection value and the amplitude adjustment value; and

adjusting the amplitude of the portion of the video signal corresponding to the spectral color according to the compensated amplitude adjustment value.

3. The image signal processing method of claim 2, wherein the environmental parameter information comprises an ambient illuminance and/or a user'"'"'s viewing distance.

4. The image signal processing method of claim 3, wherein the step of adjusting, based on the environmental parameter information the chrominance of the video signal comprises a step of:

decreasing the amplitude of the portion of the video signal corresponding to the spectral color when the ambient illuminance is less than or equal to a preset illuminance value, and/or when the user'"'"'s viewing distance is less than or equal to a preset distance value.

5. The image signal processing method of claim 1, wherein the step of receiving the video signal comprises steps of:

receiving at least one of a TV program signal, a HDMI signal or an analog signal; and

obtaining the video signal having a uniform format by converting the received TV program signal, HDMI signal or analog signal.

12. The image signal processing method of claim 2, wherein the spectral color comprises spectral blue.

13. The image signal processing method of claim 2, wherein the step of compensating the amplitude adjustment value comprises a step of:

compensating the amplitude adjustment value such that no color shift occurs or the color shift is within a predetermined range if it is judged that the color shift occurs or exceeds the predetermined range based on the algebraic sum of the amplitude detection value and the amplitude adjustment value.

14. The signal processing method of claim 1, wherein the environment parameter information comprises an ambient illuminance and/or user'"'"'s viewing distance.

15. The image signal processing method of claim 14 wherein the step of adjusting, based on the environmental parameter information, comprises adjusting the chrominance of the video signal and comprises steps of:

decreasing an amplitude of a portion of the video signal corresponding to a spectral color when the ambient illuminance is less than or equal to a preset illuminance value, and/or when the user'"'"'s viewing distance is less than or equal to a preset distance value.

16. The image signal processing method of claim 4, wherein the spectral color comprises spectral blue.

6. An image signal processing system comprising:

a receiving unit for receiving a video signal;

a sensor for acquiring environmental parameter information of a display environment;

a processing circuit comprising a luminance signal processing circuit and/or a chrominance signal processing circuit configured to adjust, based on the environmental parameter information, a luminance and/or a chrominance of the video signal, respectively, such that light of at least one spectral color generated by the video signal is adjusted accordingly; and

an output unit for outputting the adjusted video signal.

7. The image signal processing system of claim 6, wherein the processing circuit comprises the chrominance signal processing circuit, which comprises:

a color matrix converting module for converting the video signal with a color matrix;

a characteristic detecting module for detecting an amplitude of a portion of the video signal corresponding to a spectral color to obtain a corresponding amplitude detection value;

a processing module for obtaining an amplitude adjustment value of the portion of the video signal corresponding to the spectral color according to the environmental parameter information;

a hue gain adjusting module for compensating the amplitude adjustment value according to an algebraic sum of the amplitude detection value and the amplitude adjustment value; and

a drive switch adjusting module for adjusting the amplitude of the portion of the video signal corresponding to the spectral color according to the compensated amplitude adjustment value.

8. The image signal processing system of claim 7, wherein the environmental parameter information comprises an ambient illuminance and/or a user'"'"'s viewing distance.

9. The image signal processing system of claim 8, wherein the chrominance signal processing circuit is further configured to decrease the amplitude of the portion of the video signal corresponding to the spectral color when the ambient illuminance is less than or equal to a preset illuminance value, and/or when the user'"'"'s viewing distance is less than or equal to a preset distance value.

10. The image signal processing system of claim 6, wherein the receiving unit comprises:

an input for receiving at least one of a TV program signal, a HDMI signal or an analog signal; and

a converter for obtaining the video signal uniform in format by converting the received TV program signal, HDMI signal or analog signal.

11. A display comprising the image signal processing system of claim 6.

17. The image signal processing system of claim 7, wherein the spectral color comprises spectral blue.

18. The image signal processing system of claim 7, wherein:

the hue gain adjusting module is further configured to compensate the amplitude adjustment value such that no color shift occurs or the color shift is within a predetermined range if it is judged that the color shift occurs or exceeds the predetermined range based on the algebraic sum of the amplitude detection value and the amplitude adjustment value.

19. The image signal processing system of claim 6, wherein the environmental parameter information comprises an ambient illuminance and/or a user'"'"'s viewing distance.

20. The image signal processing system of claim 9, wherein the spectral color comprises spectral blue.