Apparatuses and methods for utilizing non-ideal light sources

• US 20080062161A1
• Filed: 07/19/2007
• Published: 03/13/2008
• Est. Priority Date: 08/05/1999
• Status: Abandoned Application

• Current Assignee: Microvision, Inc.
• Original Assignee: Microvision, Inc.
• Inventors: Andron, Voytek, Altendorf, Eric, Holton, Mark, Brown, Margaret, Kykta, Martin, Skurnik, David, Tegreene, Clarence, Wiklof, Christopher
• Application Number:
  US11/880,225
• Publication Number:
  US 20080062161A1
• Time in Patent Office: Days
• US Class Current: 345/207
• CPC Class Codes: G02B 2027/014 comprising information/image processing systems
• CPC Class Codes: G02B 26/0841 the reflecting element being moved or deformed by electrostatic means
• CPC Class Codes: G02B 26/0858 the reflecting means being moved or deformed by piezoelectric means
• CPC Class Codes: G02B 26/101 with both horizontal and vertical deflecting means, e.g. raster or XY scanners colour television using laser beams scanning a display screen H04N9/3129
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/0276 for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
• CPC Class Codes: G09G 2320/0285 using tables for spatial correction of display data
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 3/002 to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
• CPC Class Codes: G09G 3/006 Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309
• CPC Class Codes: G09G 3/02 by tracing or scanning a light beam on a screen
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]

Abstract

A method includes obtaining a measurement of a property of a light source, scanning light from the light source onto a surface, such that the light interacts with the surface, detecting light from the surface to create a picture element, and correcting the picture element with the measurement of the property. An apparatus includes a scanned beam display, the scanned beam display is configured to receive a signal and to scan the signal for viewing by a user. The signal is to contain picture element information. The picture element information includes information for a plurality of colors, wherein information for at least one color is corrected to substantially remove a perturbation to the picture element information, such that an image containing the picture element information will be substantially unchanged by the perturbation.

Claims

1-78. -78. (canceled)

79. A method comprising:

applying a correction to an image signal, wherein the correction is a function of a modulation level of a light source used to display an image.

80. The method of claim 79, wherein the correction is a gamma correction.

81. The method of claim 79, wherein a separate correction is applied to each light source used to display the image.

82. The method of claim 79, wherein the light source is one of a light emitting diode, an edge emitting light emitting diode, a laser diode, a diode pumped solid state laser and a laser light source.

83. The method of claim 79, wherein the light source is externally modulation.

84. A method comprising:

applying a different gamma correction to each light source within a display, wherein the display is used to display an image.

85. The method of claim 84, wherein each gamma correction is a function of a modulation level of each light source.

86. The method of claim 84, wherein the light source is externally modulated.

87. An apparatus comprising:

a display having light sources, the light sources are configured to display individual colors of an image signal, wherein separate gamma corrections are associated with each light source such that a white balance of the display is maintained across a range of light source drive levels.

88. The apparatus of claim 87, wherein each gamma correction is a function of a modulation level of the light sources.

89. A computer readable medium containing executable computer program instructions, which when executed by a data processing system cause the data to processing system to perform a method comprising:

applying a correction to an image signal, wherein the correction is a function of a modulation level of a light source used to display an image.

90. The computer readable medium of claim 89, wherein the correction is a gamma correction.

91. The computer readable medium of claim 89, wherein a separate correction is applied to each light source used to display the image.

92. The computer readable medium of claim 89, wherein the light source is one of a light emitting diode, an edge emitting light emitting diode, a laser diode, a diode pumped solid state laser and a laser light source.