Display system and user interface
Disclosed is a head-mounted display system comprising a head-mounted display unit producing a computer-generated output for a user. The head-mounted display unit includes at least one sensor. The at least one sensor may be configured to measure a parameter associated with digital eye strain for the user. The at least one sensor may be configured to communicate a measured parameter to a processor, wherein the processor is configured to effect change on the computer-generated output based on the measured parameter.
1 . A head-mounted display system comprising:
a head-mounted display unit producing a computer-generated output for a user;
at least one sensor, the at least one sensor configured to measure at least one parameter associated with digital eye strain (DES) on the user;
the at least one sensor configured to communicate a measured parameter to a processor, wherein the processor is configured to effect change on the computer-generated output based on the measured parameter,
wherein the at least one sensor is configured to measure the user's posture as an indicator of DES, including the user's head orientation relative to a remaining part of the user's body.
2 . A head-mounted display as defined in claim 1 , wherein the sensor is configured to measure the time the display unit is in use.
3 . A head-mounted display as defined in claim 1 , wherein the sensor is configured to measure a parameter relating to eye activity of a user.
4 . A head-mounted display as defined in claim 3 , wherein the at least one parameter comprises at least one of a user's blink-rate, blink completeness, pupillary characteristics, and eye movement.
5 . A head-mounted display as defined in claim 1 , wherein the change effected on the output comprises an alert for the user.
6 . A head-mounted display as defined in claim 1 , wherein the change effected on the output comprises at least one preventative change to reduce or ameliorate DES in the user.
7 . A head-mounted display as defined in claim 1 , wherein the processor is configured to:
generate a message to prompt the user to perform a predetermined instruction; and
pause operation of the display unit until the user performs the predetermined instruction.
8 . A head-mounted display as defined in claim 1 , wherein, based on input from the at least one sensor, the processor is configured to alert the user of a pre-existing condition and to seek medical evaluation.
9 . A head-mounted display as defined in claim 1 , wherein the at least one sensor is configured to measure forward or rearward tilt in the user's head or neck relative to the spine or back.
10 . A head-mounted display as defined in claim 1 , wherein the at least one sensor is configured to measure relative angular rotation of the user's head relative to the user's body.
11 . A head-mounted display as defined in claim 1 , wherein the at least one sensor is configured to measure forward or rearward tilt in the user's head or neck relative to the spine or back, and the at least one sensor is configured to measure relative angular rotation of the user's head relative to the user's body.
12 . A head-mounted display as defined in claim 1 , further comprising a timer, and wherein the processor is configured to determine the time duration that the user's head or neck is tilted and/or rotated more than a predetermined amount.
13 . A head-mounted display as defined in claim 1 , wherein the processor is configured to prompt the user to adjust the user's posture to reduce muscle fatigue in the user's neck, based on input from the at least one sensor.
14 . A head-mounted display as defined in claim 1 , wherein the processor is configured to receive subjective input from the user that is indicative of DES.
15 . A head-mounted display as defined in claim 1 , wherein the subjective input includes blurred vision, double vision, discomfort, fatigue, itching and/or headaches.
16 . A head-mounted display as defined in claim 1 , wherein the at least one sensor is configured to generate a signal indicative of a critical flicker-fusion frequency of the user as an indication of the user's DES.
17 . A head-mounted display as defined in claim 1 , wherein the at least one sensor is configured to generate a signal indicative of turning of the user's eyes.
18 . A head-mounted display as defined in claim 1 , wherein the at least one sensor is configured to capture image data of the user's face, and the processor is configured to compare the captured image data with a predetermined reference feature to determine likely impact on the user's DES.
19 . A head-mounted display as defined in claim 1 , wherein the at least one sensor is configured to generate a focus signal indicative of the user's ability to change focus of the user's eyes, and the processor is configured to evaluate the focus signal as a measure of the user's DES.