Synchronized ambient light sensor and display
First Claim
1. An electronic device, comprising:
- a display;
an ambient light sensor mounted under the display that receives ambient light through the display; and
control circuitry that periodically disables the display while enabling the ambient light sensor so that the ambient light sensor gathers ambient light sensor data without interference from light from the display, wherein the ambient light sensor exhibits an active duty cycle of less than 20%.
1 Assignment
0 Petitions
Accused Products
Abstract
An electronic device may be provided that has a display. The display may produce light using a backlight unit or using an array of light-emitting display pixels. An ambient light sensor may be mounted under an active area of the display to measure ambient light that is transmitted through the display. The display may be periodically disabled to prevent the display from producing light that interferes with the ambient light sensor. Display pixels may be coupled to a common cathode switch that can be periodically opened or the backlight in a display with a backlight can be periodically turned off. Control circuitry for periodically disabling the display while enabling the ambient light sensor may be implemented using a display driver integrated circuit mounted to a display.
-
Citations
19 Claims
-
1. An electronic device, comprising:
-
a display; an ambient light sensor mounted under the display that receives ambient light through the display; and control circuitry that periodically disables the display while enabling the ambient light sensor so that the ambient light sensor gathers ambient light sensor data without interference from light from the display, wherein the ambient light sensor exhibits an active duty cycle of less than 20%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An electronic device, comprising:
-
a display; an ambient light sensor mounted under the display that receives ambient light through the display; control circuitry that periodically disables the display while enabling the ambient light sensor so that the ambient light sensor gathers ambient light sensor data without interference from light from the display; a housing in which the display is mounted; and a display cover layer, wherein the display cover layer has a clear central portion that covers an active area of the display, wherein the display cover layer has an opaque inactive border region with an opaque masking layer that surrounds the clear central portion, and wherein the ambient light sensor is mounted under the active area of the display.
-
-
10. Apparatus, comprising:
-
a display having an array of display pixels that each contain a light-emitting diode; a switch configured to provide power to the light-emitting diodes when closed and to interrupt power to the light-emitting diodes when open; an ambient light sensor that measures ambient light that is transmitted through the array of display pixels; and control circuitry that directs the switch to periodically interrupt power to the light-emitting diodes while using the ambient light sensor to measure the ambient light. - View Dependent Claims (11, 12, 13)
-
-
14. An electronic device, comprising:
-
a housing; a display mounted in the housing; an ambient light sensor that is mounted under an active area of the display and that receives ambient light through the display; and display driver circuitry that periodically directs the display not to produce light while directing the ambient light sensor to measure the ambient light received through the display, wherein the display driver circuitry is configured to alternately enable and disable the ambient light sensor. - View Dependent Claims (15, 16, 17, 18, 19)
-
Specification