Ams Ag

Ams International Ag

Greg Stoltz

David Mehrl

Yu Albert Wang

Kerry Glover

Tom Dunn

Yu Wang

Will Townson

A method is proposed for controlling a display parameter of a mobile device. The mobile device comprises a display and a first imaging unit. The method comprising the step of positioning and orienting the display with respect to a reference plane located at a reference position, such that the first imaging unit faces towards the reference plane. Then a first image is generated by means of the first imaging unit, wherein the first image depends on ambient light incident on the first imaging unit and emitted from at least one ambient light source. A first light level is calculated from the first image, wherein the first light level is indicative of a first fraction of the incident ambient light which illuminates the reference plane by means of specular reflection of the incident ambient light at the display. Finally, the display parameter is adjusted depending on the first light level.

Method for controlling a display parameter of a mobile device and computer program product

An optical proximity sensor arrangement comprises a semiconductor substrate () with a main surface (). A first integrated circuit () comprises at least one light sensitive component (). The first integrated circuit is arranged on the substrate at or near the main surface. A second integrated circuit () comprises at least one light emitting component (), and is arranged on the substrate at or near the main surface. A light barrier () is arranged between the first and second integrated circuits. The light barrier being designed to block light to be emitted by the at least one light emitting component from directly reaching the at least one light sensitive component. A multilayer mask () is arranged on or near the first integrated circuit and comprising a stack () of a first layer () of first elongated light blocking slats () and at least one second layer () of second elongated light blocking slats (). The light blocking slats are arranged in the mask to block light, incident on the mask from a first region of incidence (), and to pass light, incident on the mask from a second region of incidence (), from reaching the at least one light sensitive component.

Optical proximity sensor arrangement and method for producing an optical proximity sensor arrangement

An optical sensor arrangement comprises an optical barrier which is placed between a light-emitting device and a photodetector. Herein the light-emitting device and the photodetector are arranged on a first plane and are covered by a cover. The photodetector exhibits an active zone. The optical barrier exhibits an extent along a first principal axis, which is pointing parallel to the line connecting the centers of the light-emitting device and the photodetector. Herein the extent is greater than a dimension of the active zone. The optical barrier is designed to block light emitted by the light-emitting device that otherwise would be reflected by the cover by means of specular reflection and would reach the photodetector. The optical barrier is designed to pass light emitted by the light-emitting device and scattered on or above an outer surface of the cover.

Optical sensor arrangement with optical barrier for passing light emitted by light emitting device and scattered on or above an outer surface of cover

An optical proximity sensor often emits light, and detects the photons in the returned light signal. Because light can be reflected and scattered by cover glass and ink layer printed on the cover glass, optical crosstalk is a concern for the optical proximity sensors. In one embodiment, the present disclosure provides an optical proximity sensor including a linear polarizer to cover the photo detector, or a polarizer to cover the light emitting device, or two polarizers to cover both the photo detector and the light emitting device. The polarizer blocks the s-polarized light and only allows the p-polarized light to pass through. Because the scattered light is predominated by the s-polarization, the optical crosstalk may be reduced.

System and method for using a linear polarizer to reduce optical crosstalk for optical proximity sensors

A dispersive element is disclosed which is designed to receive incident light () and disperse the incident light () into multiple spatially separated wavelengths of light. The dispersive body (DB) comprises a collimation cavity (COLL) to collimate the incident light (), at least two optical interfaces (PRIS) to receive and disperse the collimated light () and a collection cavity (CLCT) to collect the dispersed light () from the at least two dispersive interfaces (opop) and to focus the collected light ().

Growing community of inventors

Flower Mound, TX, United States of America

Greg Stoltz