System and method to eliminate incident light reflection from displays in cameras
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.
1 . 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.
2 . The IHS of claim 1 , wherein the IHS is one of a desktop computer, laptop computer, tablet computer, or smartphone.
3 . The IHS of claim 1 , wherein the display is a liquid crystal display.
4 . The IHS of claim 1 , wherein the camera is a webcam.
5 . The IHS of claim 1 , wherein the polarizer of the camera is static polarizing film that is placed in front of a lens of the camera.
6 . The IHS of claim 1 , wherein the polarizer of the camera is an adjustable rotating polarizer that is adjusted to be 90 degrees or perpendicular in polarity to the polarizer of the display.
7 . The IHS of claim 6 , wherein the adjustable rotating polarizer is an assembly that is attached to the camera.
8 . 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.
9 . The camera of claim 8 , wherein the IHS is one of a desktop computer, laptop computer, tablet computer, or smartphone.
10 . The camera of claim 8 , wherein the display is a liquid crystal display that comprises a stack-up of layers that includes the top layer polarizer.
11 . The camera of claim 8 , wherein the camera is a webcam.
12 . The camera of claim 8 , wherein the polarizer is static polarizing film that is placed in front of the lens of the camera.
13 . The camera of claim 8 , wherein the polarizer is an adjustable rotating polarizer that is adjusted to be 90 degrees or perpendicular in polarity to top layer polarizer of the display.
14 . The camera of claim 13 , wherein the adjustable rotating polarizer is an assembly that is attached to the camera.
15 . 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.
16 . The computer-implementable method of claim 15 , wherein the IHS is one of a desktop computer, laptop computer, tablet computer, or smartphone.
17 . The computer-implementable method of claim 15 , wherein the display includes stack-up layers and the polarizer which polarizes transmitted light is a top layer.
18 . The computer-implementable method of claim 15 , wherein the polarizer in front of the camera is static polarizing film place in front of a lens of the camera.
19 . The computer-implementable method of claim 15 , wherein the polarizer in front of the camera is an adjustable rotating polarizer that is adjusted to be 90 degrees or perpendicular in polarity to top layer polarizer of the display.
20 . The computer-implementable method of claim 19 , wherein the adjustable rotating polarizer is an assembly attached to the camera.