System and method to eliminate incident light reflection from displays in cameras
AssigneeDell Products L.P.
InventorsGhee Beng Ooi, Chih-Hao Kao, Tiak Hooy Sim
Life of this patent
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Abstract
Described are systems and methods to eliminate reflection from a display's incident light that is captured by a camera, such as a webcam. The display includes a polarizer that polarizes light which is reflected by a medium such as glass to the camera. The reflected light includes linearly polarized light. A polarizer is strategically placed in front of the lens set of a camera. Utilizing an orientation perpendicular to the reflected incident light, reflection from the reflective surfaces is eliminated before it enters the lens set of the camera.
Claims20
An information handling system (IHS) comprising:
- a display that includes a stack-up of layers, wherein a top layer is a polarizer from which linearly polarized light is transmitted from the display, wherein the transmitted linearly polarized light is reflected as incident light back to the display;
- a camera that receives incident light, including linearly polarized light, from the light transmitted from the display, and
- a polarizer in front of the camera that is 90 degrees or perpendicular in polarity of the polarizer of the display, which polarizes the incident transmitted linearly polarized light from the display and receives transmitted and linearly polarized and diffused incident light, wherein incident transmitted linearly polarized light and diffused non-polarized incident light are processed to generate images on the display.
A camera connected to an information handling system (IHS) comprising:
- a lens;
- a polarizer placed in front of the lens to receive incident light transmitted from a display that includes linearly polarized light, wherein the display that comprises a top layer polarizer from which the light is linearly polarized, wherein the polarizer is 90 degrees or perpendicular in polarity to the top layer polarizer, the polarizer cancels the received incident linearly polarized light, wherein the polarizer in front of the lens polarizes the incident transmitted linearly polarized light from the display and receives transmitted and linearly polarized and diffused incident light, wherein incident transmitted linearly polarized light and diffused non-polarized incident light are processed to generate images on the display.
A computer-implementable method for eliminating reflection from incident light captured by an information handling system (IHS) camera comprising:
- determining polarity of a polarizer which polarizes incident transmitted linearly polarized light from a display connected to the IHS;
- providing a polarizer in front of the camera that is 90 degrees or perpendicular to the polarity of the polarizer which polarizes the incident transmitted linearly polarized light from the display;
- receiving by the polarizer in front of the camera, the incident transmitted linearly polarized light and diffused incident light;
- and
- processing the incident transmitted linearly polarized light and diffused non-polarized incident light to generate images on the display.
Dependencies are inferred from the claim text.