Systems and methods for correcting ambient-light illuminance differences of ambient light directed onto regions of a display

A method, comprising:

• receiving, by a controller, sensor outputs from each light sensor in a light sensor array of light sensors of a display with a front side and a back side;
• wherein the display comprises the light sensor array of light sensors and a light source array of light sources;
• wherein the light source array of light sources emit light to display an image on the display;
• computing, by the controller using the received sensor outputs, an ambient-light illuminance difference between a first illuminance of a first ambient light externally directed onto a first region of the displayed image on the front side of the display and a second illuminance of a least one second ambient light externally directed respectively onto a second region of the displayed image on the front side of the display;
• wherein the first illuminance is detected from a first portion of the light sensors in the light sensor array in the first region of the displayed image;
• wherein the second illuminance is detected from a second portion of the light sensors in the light sensor array in the second region of the displayed image;
• wherein the first region is different from the second region and the first portion of the light sensors is different from the second portion of the light sensors;
• varying, by the controller, light source controls of light sources of the light source array to change a luminous emittance of the light source array within the second region of the displayed image based on calibration data stored in a memory so as to reduce a luminance difference between the first region and the second region of the displayed image;
• wherein the calibration data relates the luminous emittance from the light source array to the light source controls controlling the emitted light from the light sources of the light source array;
• and
• wherein the luminous emittance from the displayed image is substantially opposite to the first illuminance of the first ambient light and the second illuminance of the second ambient light directed onto the displayed image.