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System and Method of Viewing Angle Calibration on a Mobile Device

IP.com Disclosure Number: IPCOM000130516D
Publication Date: 2005-Oct-25
Document File: 2 page(s) / 74K

Publishing Venue

The IP.com Prior Art Database

Abstract

This proposed solutoin addresses the problem of precisely defining the angle of viewing a display particularly for measurements of optical parameters of displays or any well-illuminated objects.

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VIEWING ANGLE CALIBRATOR

System and Method of Viewing Angle Calibration on a

Mobile

Device

Disclosed Anonymously

This proposed solutoin addresses the problem of precisely defining the angle of viewing a display particularly for measurements of optical parameters of displays or any well-illuminated  objects.

The viewing angle can be defined by viewing through calbrated lines marked on the sides of an optically clear block of a defined length.The lines are marked at intervals calculated to represent the angle the lines on one face subtends to the line on the other face. By viewing through the block when the line corresponding to the desired angle coincedes with the reference line on the other side of the optical block the viewing angle is set.  The distances are based on the tangent of the required angle. The lines are calibrated in angle rather than the distance to facilitate easy reading of the viewing angle.

The diagrams below show the top and bottom marking required on the optically clear block. The crosshair provides the reference for aligning the top and bottom to Zero degrees.

 

  • The horizontal lines on the top face are marked in degrees (that it subtends to the line parallel to it on the other face).The distance between two top lines is  L tan Θ, where Θ is the angle the line subtends to the line on face A parallel to it.
  • The lines are typically at 2 degree intervals. This can be varied depending on the need of the application.
  • It is preferred to have a  line thickn...