Glare reduction system

• US 9,448,449 B2
• Filed: 05/09/2013
• Issued: 09/20/2016
• Est. Priority Date: 01/31/2013
• Status: Active Grant

• Current Assignee: Venkataraman Ramanathan
• Original Assignee: Venkataraman Ramanathan
• Inventors: Ramanathan, Venkataraman
• Primary Examiner(s): ABDULSELAM, ABBAS I
• Application Number:
  US13/890,756
• Publication Number:
  US 20140211114A1
• Time in Patent Office: 1,230 Days
• US Class Current: 1/1
• CPC Class Codes: B60R 1/088 using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
• CPC Class Codes: G02F 1/133531 characterised by the arrangement of polariser or analyser axes
• CPC Class Codes: G02F 1/1347 Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells

Abstract

A glare reduction system is disclosed including a display device configured for placement in a line of sight of an object. The display device includes a plurality of picture elements without a color filter. Each of the picture elements have a pair of spaced apart polarizing elements in substantially parallel orientation with respect to each other, and a liquid crystal element between the polarizing elements. An imaging source is provided to receive light from the object. The glare reduction system further includes a display driver to process the received light to generate a voltage signal, and selectively provide the voltage signal to one or more of the picture elements in order to regulate the opacity of the display device.

Claims

1. A substantially transparent display device for placement in a line of sight of an object, the display device comprising:

a plurality of picture elements without a color filter, wherein one or more picture elements of the plurality of picture elements receive light from the object;

a pair of spaced apart polarizing elements in substantially parallel orientation with respect to each other;

at least one liquid crystal element disposed between the pair of polarizing elements, wherein the plurality of picture elements, the pair of polarizing elements, and the at least one liquid crystal element are arranged in such a manner that the display device is transparent; and

a display driver configured to;

receive the light from the object;

determine an intensity of the light received from the object; and

selectively provide a voltage signal to the one or more picture elements when the intensity of light received by the one or more picture elements from the object is greater than a threshold, wherein the voltage signal corresponding to each of the one or more picture elements is determined based on the intensity of light received by the respective one or more picture elements, wherein the voltage signal regulates the opacity of the one or more picture elements to block at least a portion of the light from the object.

2. The display device of claim 1, wherein each of the plurality of picture elements represents a sub pixel.

3. The display device of claim 1, wherein the display driver is a CMOS sensor.

4. The display device of claim 1, wherein the display driver is an NTSC analog controller.

5. The display device of claim 1, wherein the display driver includes a CMOS sensor and an NTSC analog controller.

6. The display device of claim 1, wherein the display driver is configured to generate the voltage signal analogous to the intensity of the received light for at least one of the corresponding picture element.

7. The display device of claim 1, wherein each picture element includes two liquid crystal elements disposed between the polarizing elements.

8. A glare reduction system, comprising:

a substantially transparent display device configured for placement in a line of sight of an object, the display device comprising;

a plurality of picture elements without a color filter, wherein one or more picture elements of the plurality of picture elements receive light from the object;

a pair of spaced apart polarizing elements in substantially parallel orientation with respect to each other; and

at least one liquid crystal element disposed between the pair of polarizing elements, wherein the plurality of picture elements, the pair of polarizing elements, and the at least one liquid crystal element are arranged in such a manner that the display device is transparent; and

A display driver comprising;

an imaging source configured to receive the light from the object;

wherein the display driver processes the received light to selectively generate a voltage signal for the one or more picture elements when intensity of light received from the object is greater than a threshold, wherein the voltage signal corresponding to each of the one or more picture elements is determined based on the intensity of light received by the respective one or more picture elements, and wherein the display driver provides the voltage signal to the one or more picture elements to regulate the opacity of the one or more picture elements to block at least a portion of the light from the object.

9. The glare reduction system of claim 8, wherein each of the plurality picture elements represents a sub pixel for the display device.

10. The glare reduction system of claim 8, wherein the display driver is a CMOS sensor.

11. The glare reduction system of claim 8, wherein the display driver is an NTSC analog controller.

12. The glare reduction system of claim 8, wherein the display driver includes a CMOS sensor and an NTSC analog controller.

13. The glare reduction system of claim 8, wherein the display driver is configured to generate the voltage signal analogous to the intensity of the received light for at least one of the corresponding picture element.

14. The glare reduction system of claim 8, wherein each picture element includes two liquid crystal elements disposed between the polarizing elements.

15. A method of glare reduction in a substantially transparent display device configured for placement in line of sight of an object to be displayed, the display device having a plurality of picture elements without a color filter, and a display driver, the method comprising:

receiving, by at least one picture element of the plurality of picture elements and the display driver, light from the object to be displayed;

processing, by the display driver, the received light to selectively generate a voltage signal for the at least one picture element out when an intensity of the light received from the object is greater than a threshold, wherein the voltage signal corresponding to the at least one picture element is determined based on the intensity of light received by the at least one picture element;

addressing the at least one picture element * to respond to the voltage signal to regulate the opacity of the at least one picture element to block at least a portion of the light received from the object; and

displaying an end image of the object at the plurality of picture elements, by means of light passed from a first polarizing element and a second polarizing element, in the display device, the first and second polarizing elements being disposed in substantially parallel orientation with respect to each other.

16. The method of claim 15 further includes adjusting a contrast value of the display device in order to display the end image.

17. The method of claim 15 further includes adjusting a brightness value of the display device in order to display the end image.

18. The method of claim 15 further includes adjusting a color saturation of the display device in order to display the end image.