Ams Ag

Ams International Ag

Bernhard Greimel-Laengauer

Herbert Lenhard

Mario Teufel

Karl Waser

A light sensor is disclosed. The light sensor comprises a first pixel and a second pixel. The light sensor comprises measurement circuitry. The first pixel is configured to accumulate a first charge and the second pixel is configured to accumulate a second charge when the light sensor is exposed to light. The first pixel is configured to trigger the measurement circuitry to measure the second charge when the first charge reaches a threshold capacity of the first pixel. Also disclosed is an active pixel sensor comprising the light sensor, an image sensor and a device incorporating the light sensor.

Light sensor

A method of sensing a level of ambient light in an electronic device comprising sensing a combined light level of ambient light and light from the display, integrating this to determine an integrated light level, determining an integrated display light level, and compensating the integrated light level using the integrated display light level to determine the ambient light level. The device modulates the display between first and second brightness levels and determining the integrated display light level comprises sensing a combination of light from the display and ambient light when at each of the first and second brightness levels, determining a difference, and applying a calibration value to the difference to determine the integrated display light level.

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Hofstätten an der Raab, Austria

Bernhard Greimel-Laengauer