Display device and control method for display device

• US 10,101,586 B2
• Filed: 12/02/2015
• Issued: 10/16/2018
• Est. Priority Date: 12/24/2014
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Fujimaki, Yutaka, Takagi, Masayuki, Kimura, Fusashi, Yajima, Kenro
• Primary Examiner(s): Patel, Kumar
• Assistant Examiner(s): Onyekaba, Amy C
• Application Number:
  US14/957,119
• Publication Number:
  US 20160187652A1
• Time in Patent Office: 1,049 Days
• Field of Search: None
• CPC Class Codes: G02B 2027/0112 comprising device for genereting colour display
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/0132 comprising binocular systems
• CPC Class Codes: G02B 2027/014 comprising information/image processing systems
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02B 27/0172 characterised by optical features

Abstract

An HMD includes an image display section worn on the head of a user and configured to output image light and an illuminance sensor configured to detect light. The HMD includes a sub-control section. The sub-control section adjusts, on the basis of a detection value of the illuminance sensor, the image light output by the image display section.

Claims

1. A display device comprising:

a display configured to output image light to a user;

a sensor configured to detect light; and

a controller configured to adjust, on the basis of a detection value of the sensor, the image light output by the display, wherein

the display outputs image light including a plurality of color lights to the user and displays an image,

the controller controls, on the basis of a detection result of the sensor, a color tone of the image light output by the display,

the sensor detects intensity of received light for each of a plurality of different wavelengths, and

the controller is configured to execute first processing for controlling, on the basis of the intensity of the light for each wavelength detected by the sensor, the luminance of each of the plurality of color lights included in the image light to improve visibility of the user for visually recognizing the image light and second processing for controlling, on the basis of the intensity of the light for each wavelength detected by the sensor, the luminance of each of the plurality of color lights included in the image light to bring the color tone of the image light close to a color tone of the light detected by the sensor and selects and executes one of the first processing and the second processing according to an attribute of an image displayed on the display.

2. The display device according to claim 1, wherein

the display device is a display device of a head mounted type mounted on a head of a user,

the display irradiates the image light on eyes of the user, and

the controller performs adjustment processing for adjusting luminance of the display and correction processing for calculating a correction coefficient on the basis of a detection value of the sensor and correcting the luminance of the display.

3. The display device according to claim 2, wherein the controller calculates the correction coefficient using the detection value of the sensor.

4. The display device according to claim 3, wherein the controller calculates the correction coefficient by applying the detection value of the sensor to an arithmetic expression set in advance and performing arithmetic processing.

5. The display device according to claim 3, wherein the controller calculates the correction coefficient by applying the detection value of the sensor to a table set in advance.

6. The display device according to claim 2, wherein the controller performs, in the correction processing, according to the correction coefficient, an arithmetic operation for correcting the luminance of the display after the adjustment processing and corrects the luminance of the display.

7. The display device according to claim 6, wherein the controller multiplies a luminance value of the display set in the adjustment processing with the correction coefficient and corrects the luminance value of the display through the correction processing.

8. The display device according to claim 2, wherein the controller executes hysteresis processing in changing a luminance value of the display to the corrected luminance value through the correction processing and is capable of setting a condition of the hysteresis processing independently when the luminance value of the display is changed to a high luminance side and when the luminance value is changed to a low luminance side.

9. The display device according to claim 2, wherein

the display includes a display for a right eye configured to irradiate the image light on a right eye of the user and a display for a left eye configured to irradiate the image light on a left eye of the user, and

the controller sets luminance of the display for the right eye and luminance of the display for the left eye independently from each other through the adjustment processing.

10. The display device according to claim 2, wherein the display is a display of a see-through type that transmits external light and makes the external light incident on the eyes of the user.

11. The display device according to claim 10, wherein the sensor includes a light sensor that detects light from a direction of visual recognition of the user through the display.

12. The display device according to claim 2, further comprising a microprocessor configured separately from the controller and connected to the controller, wherein

the microprocessor instructs the controller to perform the correction processing, and

the controller executes the adjustment processing and the correction processing on the basis of the instruction of the microprocessor.

13. The display device according to claim 1, wherein the sensor detects light from a direction different from a direction of the image light output by the display.

14. The display device according to claim 13, wherein

the display is worn on the head of the user and configured to output the image light in a state in which external light can be made incident on a visual field of the user, and

sensor detects the external light made incident on the visual field of the user.

15. The display device according to claim 1, wherein

the sensor is provided adjacent to the display and detects light from a front of a face of the user.

16. The display device according to claim 1, wherein the controller causes, on the basis of image data including a plurality of color data, the display to output the color lights forming the image and, by changing a gradation value of the plurality of color data included in the image data, change the color tone of the image light.

17. The display device according to claim 1, wherein the controller controls, on the basis of the intensity of the light for each wavelength detected by the sensor, the color tone of the image light output by the display.

18. The display device according to claim 17, wherein the controller controls the color tone of the image light to improve visibility of the user for visually recognizing the image light.

19. The display device according to claim 17, wherein the controller controls the luminance of each of the plurality of color lights included in the image light to bring the color tone of the image light close to a color tone of the light detected by the sensor.

20. The display device according to claim 1 wherein, when executing the first processing, if the intensity of the light detected by the sensor is lower than intensity set in advance, the controller changes a ratio of the luminance of each of the plurality of color lights included in the image light to a ratio set in advance.

21. The display device according to claim 20, wherein, if the intensity of the light detected by the sensor is lower than the intensity set in advance, the controller executes contrast correction processing and/or edge correction processing on image data of the image displayed by the display.

22. The display device according to claim 1, wherein, if the intensity of the light detected by the sensor is lower than intensity set in advance, the controller changes a ratio of the luminance of each of the plurality of color lights included in the image light to a ratio set in advance.

23. The display device according to claim 22, wherein

the sensor is capable of being switched to a first detection state and a second detection state more suitable for detection of light having low intensity than the first detection state, and

when the sensor is switched to the second detection state, the controller changes the ratio of the luminance of each of the plurality of color lights included in the image light to the ratio set in advance.

24. A display device comprising:

a display configured to output image light to a user;

a sensor configured to detect light; and

a controller configured to adjust, on the basis of a detection value of the sensor, the image light output by the display, wherein

the display outputs image light including a plurality of color lights to the user and displays an image,

the controller controls, on the basis of a detection result of the sensor, a color tone of the image light output by the display,

the display includes a display region located in a visual field of the user, and

the controller divides the display region into a plurality of portions and controls the color tone of the image light for each of the portions on the basis of a detection result of detection of the external light made incident on the visual field of the user by the sensor.

25. The display device according to claim 24, wherein the sensor is capable of detecting intensities of respective lights made incident on the visual field of the user from a plurality of directions.

26. A control method for a display device including a display configured to output image light to a user and a sensor configured to detect light, the control method comprising:

adjusting, on the basis of a detection value of the sensor, the image light output by the display;

outputting image light including a plurality of color lights to the user and displays an image;

controlling, on the basis of a detection result of the sensor, a color tone of the image light output by the display;

detecting, by the sensor, intensity of received light for each of a plurality of different wavelengths; and

executing first processing for controlling, on the basis of the intensity of the light for each wavelength detected by the sensor, the luminance of each of the plurality of color lights included in the image light to improve visibility of the user for visually recognizing the image light and second processing for controlling, on the basis of the intensity of the light for each wavelength detected by the sensor, the luminance of each of the plurality of color lights included in the image light to bring the color tone of the image light close to a color tone of the light detected by the sensor and selects and executes one of the first processing and the second processing according to an attribute of an image displayed on the display.

27. The control method for the display device according to claim 26, further comprising:

controlling a display device including, as the display, a display worn on a head of a user and configured to irradiate image light on eyes of the user; and

executing adjustment processing for adjusting luminance of the display and correction processing for calculating a correction coefficient on the basis of a detection value of the sensor and correcting the luminance of the display.

28. The control method for the display device according to claim 26, further comprising:

controlling a display device including, as the display, a display configured to output image light including a plurality of color lights to a user and display an image and including, as the sensor, a sensor configured to detect light made incident on a visual field of the user from a direction different from a direction of the image light output by the display; and

controlling, on the basis of a detection result of the sensor, a color tone of the image light output by the display.