Controlling a display device
View Patent ↗Examples of the present disclosure relate to methods for controlling a display device. In one such example, data representing a result of an eyewear detection operation is obtained. Dependent on the obtained data, a control signal is outputted to adjust a display parameter of the display device. Performing the eyewear detection operation comprises receiving image data representing a user of the display device, and processing the image data using object recognition to determine whether or not the user is wearing eyewear of a predetermined type.
1. A method of controlling a display device, the method comprising:
obtaining data representing a result of an eyewear detection operation;
determining a current luminance value of the display device; and
dependent on the obtained data, outputting a control signal to adjust a display parameter of the display device, wherein the control signal is based at least in part on a comparison between the current luminance value and a threshold value, wherein, based on the current luminance value having a first predetermined relationship with the threshold value, the control signal is operable to adjust, as the display parameter, a first display parameter of the display device, and wherein, based on the current luminance value having a second predetermined relationship with the threshold value, the control signal is operable to adjust, as the display parameter, a second, different, display parameter of the display device,
wherein performing the eyewear detection operation comprises:
receiving image data representing a user of the display device; and
processing the image data using object recognition to determine whether or not the user is wearing eyewear of a predetermined type.
2. A method according to claim 1 , wherein the obtaining the data comprises performing the eyewear detection operation.
3. A method according to claim 1 , wherein the processing the image data comprises using at least one artificial neural network.
4. A method according to claim 1 , wherein the predetermined type comprises sunglasses.
5. A method according to claim 1 ,
wherein the predetermined type comprises a predetermined class of sunglasses, and
wherein the control signal is based at least in part on the predetermined class of sunglasses.
6. A method according to claim 1 , wherein the display parameter comprises an output luminance of the display device.
7. A method according to claim 1 , wherein the display parameter comprises an output color profile of the display device.
8. A method according to claim 1 , wherein the display parameter comprises a tone mapping function implemented by the display device.
9. A method according to claim 1 , the method comprising determining an orientation of the display device relative to the eyewear and/or the user, wherein the control signal is based at least in part on the determined orientation.
10. A method according to claim 1 , wherein the display parameter comprises an output polarization characteristic of the display device.
11. A method according to claim 1 , wherein the display device comprises a liquid crystal display panel and a polarization modulator, the polarization modulator being configured to modulate a polarization state of light having been emitted from the liquid crystal display panel, the control signal being operable to control the polarization modulator.
12. A method according to claim 1 , the method comprising determining a distance between the display device and one or more of the eyewear and the user, wherein the control signal is based at least in part on the determined distance.
13. A method according to claim 1 , the method comprising determining an optical transmittance function of the eyewear, wherein the control signal is based at least in part on the determined optical transmittance function.
14. A method according to claim 1 , the method comprising determining a tint value associated with the eyewear, wherein the control signal is based at least in part on the determined tint value.
15. A method according to claim 1 , wherein the control signal is based at least in part on a predetermined characteristic of detected ambient light.
16. A method according to claim 1 , wherein the control signal is operable to cause the display device to perform a spatially-varying image processing algorithm for adjusting a display output of the display device.
17. Apparatus for controlling a display device, the apparatus comprising:
an eyewear detector configured to obtain data representing a result of an eyewear detection operation; and
a display adjuster configured to determine a current luminance value of the display device, and, dependent on the obtained data, output a control signal to adjust a display parameter of the display device, wherein the control signal is based at least in part on a comparison between the current luminance value and a threshold value, wherein, based on the current luminance value having a first predetermined relationship with the threshold value, the control signal is operable to adjust, as the display parameter, a first display parameter of the display device, and wherein, based on the current luminance value having a second predetermined relationship with the threshold value, the control signal is operable to adjust, as the display parameter, a second, different, display parameter of the display device,
wherein performing the eyewear detection operation comprises:
receiving image data representing a user of the display device; and
processing the image data using object recognition to determine whether or not the user is wearing eyewear of a predetermined type.