Display, display control method, display control device, and electronic apparatus

• US 9,899,000 B2
• Filed: 06/17/2014
• Issued: 02/20/2018
• Est. Priority Date: 06/25/2013
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Takahota, Noriyoshi, Hirakawa, Takashi, Kato, Eiji
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): ZUBAJLO, JENNIFER L
• Application Number:
  US14/422,103
• Publication Number:
  US 20150235620A1
• Time in Patent Office: 1,344 Days
• CPC Class Codes: G09G 2310/0235 Field-sequential colour display
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/062 Adjustment of illumination source parameters
• CPC Class Codes: G09G 2320/064 by time modulation of the brightness of the illumination source
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers
• CPC Class Codes: G09G 5/10 Intensity circuits
• CPC Class Codes: G09G 5/18 Timing circuits for raster scan displays specially adapted for television H04N ; synchronisation between the display unit and other display units, videodisc player G09G5/12

Abstract

A display device configured to display at least one image. The display device includes at least one light emitter configured to emit a plurality of colored light beams, each of the plurality of colored light beams being a respective color different than the others; and a light emission controller configured to determine, based on at least one characteristic of the at least one image, one or more light beams of the plurality of colored light beams to emit in a frame period corresponding to the at least one image.

Claims

1. A display device configured to display at least one moving image, the display device comprising:

at least one light emitter configured to emit light beams of a plurality of different colors; and

a light emission controller configured to;

(A) determine, based on at least one characteristic of the at least one moving image during a first frame period, a first set of one or more colors from the plurality of different colors that the at least one light emitter is configured to emit;

(B) determine one or more light emission periods within the first frame period, each light emission period corresponding respectively to the one or more colors determined in (A);

(C) for each color determined in (A), cause the at least one light emitter to emit a light beam having that color during the corresponding light emission period within the first frame period;

(D) determine, based on the at least one characteristic of the at least one moving image during a second frame period, a second set of one or more colors from the plurality of different colors that the at least one light emitter is configured to emit, the second set of one or more colors comprising fewer colors than the first set of one or more colors;

(E) determine one or more light emission periods within the second frame period, each light emission period corresponding respectively to the one or more colors determined in (D); and

(F) for each color determined in (D), cause the at least one light emitter to emit a light beam having that color during the corresponding light emission period within the second frame period, wherein the first set of one or more colors and the second set of one or more colors comprise at least one color in common, and the light emission period for the at least one color within the second frame period is longer than the light emission period for the at least one color within the first frame period.

2. The display device of claim 1, wherein the at least one characteristic of the at least one moving image comprises luminance information related to color components of the at least one moving image corresponding respectively to the plurality of different colors that the at least one light emitter is configured to emit.

3. The display device of claim 2, wherein the light emission controller is further configured to:

compare the luminance information of the at least one moving image during the second frame period to a threshold value;

obtain at least one color component, excluding one or more color components with luminance values less than the threshold value, wherein the color corresponding to the obtained at least one color component is included in the second set of one or more colors determined in (D).

4. The display device of claim 2, further comprising:

a display section configured to display the at least one moving image by transmitting or reflecting light from the at least one light emitter.

5. The display device of claim 4, further comprising:

a display controller configured to drive the display section based on the luminance information.

6. The display device of claim 5, further comprising:

a memory configured to store the luminance information, wherein;

the display controller is configured to, for the second frame period;

read, from the memory, only portions of the luminance information related to the color components that correspond to the one or more colors in the second set of one or more colors determined in (D); and

drive the display section during the second frame period based on the read luminance information.

7. The display device of claim 6, wherein the display controller is further configured to, for the second frame period:

write into memory only the luminance information related to the color components that correspond to the one or more colors in the second set of one or more colors determined in (D).

8. The display device of claim 1, wherein the light emission periods determined in (E) have a same length, and wherein the light emission controller is further configured to determine the length by dividing a length of the second frame period by a number of colors in the second set of one or more colors.

9. The display device of claim 1, wherein the light emission periods determined in (E) are non-overlapping.

10. The display device of claim 1, wherein at least two of the light emission periods determined in (E) overlap at least partially with one another.

11. The display device of claim 1, wherein the light emission controller is further configured to control, for at least one color determined in (D), a light emission start time and/or a light emission finish time within the second frame period.

12. The display device of claim 1, wherein the light emission controller is further configured to control, for at least one color determined in (D), an emission luminance within the second frame period.

13. The display device of claim 1, wherein the plurality of different colors that the at least one light emitter is configured to emit are red, green and blue.

14. The display device of claim 1, further comprising a converter configured to convert a signal other than an RGB signal into an RGB signal.

15. The display device of claim 1, wherein the display device is a head-mounted display.

16. The display device of claim 1, wherein the display device is a projector.

17. The display device of claim 1, wherein the display device is a field sequential driving type device.

18. A light emitting device, comprising:

a plurality of light emitters, each of the plurality of light emitters configured to emit light of a different color of a plurality of colors;

a light emission controller configured to;

receive a plurality of image signals, each of the image signals corresponding to a respective one of the plurality of colors that the plurality of light emitters are configured to emit;

determine, based on the plurality of image signals, one or more light emitters to emit light in an image frame period, a number of respective light emission periods within the image frame period during which the determined ones of the light emitters are to emit light, and respective durations of the determined light emission periods during which the determined ones of light emitters are to emit light, wherein the number of respective light emission periods is smaller than a number of different colors of the plurality of colors that the plurality of light emitters are configured to emit; and

output a control signal to each of the plurality of light emitters based on the determinations of the light emission controller.