Method and apparatus for controlling an active matrix display
First Claim
1. A method of controlling an array of pixels in an active matrix display to a predetermined emission level, the pixels arranged in a plurality of rows and a plurality of columns, each pixel having an active matrix element, the method using a plurality of sensors each having a measurable sensor parameter and at least one pixel driver, the method comprising:
- varying light emission from a plurality of pixels in a first row using the at least one pixel driver and the active matrix elements;
receiving light emission from the plurality of pixels at the plurality of sensors;
obtaining a measured value of the measurable sensor parameter for each of the plurality of sensors responsive to the received light emission; and
for each of the plurality of pixels, generating a control signal for the pixel to maintain constant emission from the light source at the predetermined emission level.
5 Assignments
0 Petitions
Accused Products
Abstract
A method of controlling an array of pixels in an active matrix display to a predetermined emission level is provided. The pixels are arranged in a plurality of rows and a plurality of columns, each pixel having an active matrix element. The method makes use of a plurality of sensors each having a measurable sensor parameter and at least one pixel driver. Light emission is varied from a plurality of pixels in a first row using the pixel driver and the active matrix elements in the pixels. Light emission is received from the pixels at the sensors and a measured value of the measurable sensor parameter is obtained responsive to the received light emission. For each of the plurality of pixels, a control signal is generated for the pixel to maintain constant emission from the light source at the predetermined emission level.
-
Citations
30 Claims
-
1. A method of controlling an array of pixels in an active matrix display to a predetermined emission level, the pixels arranged in a plurality of rows and a plurality of columns, each pixel having an active matrix element, the method using a plurality of sensors each having a measurable sensor parameter and at least one pixel driver, the method comprising:
-
varying light emission from a plurality of pixels in a first row using the at least one pixel driver and the active matrix elements;
receiving light emission from the plurality of pixels at the plurality of sensors;
obtaining a measured value of the measurable sensor parameter for each of the plurality of sensors responsive to the received light emission; and
for each of the plurality of pixels, generating a control signal for the pixel to maintain constant emission from the light source at the predetermined emission level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
23. An apparatus for controlling an active matrix display including an array of pixels arranged in a plurality of rows and a plurality of columns, each pixel element including an active matrix element, the apparatus comprising:
-
a sensor array arranged in a plurality of rows and a plurality of columns, each sensor having a measurable sensor parameter and positioned to receive at least a portion of the radiation emitted from at least one of the pixels;
a row selector coupled to the sensor array and coupleable to the display operable to select at least one of the plurality of rows; and
a plurality of control units, each coupled to a plurality of the sensors located in a common column and a reference signal indicative of a target value of the measurable sensor parameter for a pixel in the selected row, the control unit operable to compare a measured value of the sensor parameter with the reference signal and generate a control signal, the control unit further coupled to the active matrix elements such that the active matrix elements receive the control signal and maintain the amount of radiation emitted from the light source. - View Dependent Claims (24, 25, 26)
-
-
27. A controlled active matrix display, comprising:
-
an array of pixels arranged in a plurality of rows and a plurality of columns, each pixel element including an active pixel element configured to drive the pixel;
a sensor array arranged in the plurality of rows and the plurality of columns, each sensor having a measurable sensor parameter and positioned to receive at least a portion of the radiation emitted from at least one of the pixels;
a row selector coupled to the sensor array and the array of pixels and operable to select at least one of the plurality of rows;
a plurality of control units, each coupled to a plurality of the sensors located in a common column and a reference signal indicative of a target value of the measurable sensor parameter for a pixel in the selected row, the control unit operable to compare a measured value of the sensor parameter with the reference signal and generate a control signal; and
a pixel driver coupled to the active matrix elements, the pixel driver coupled to the active matrix elements and operable to vary an amount of radiation emitted from at least one pixel, the active matrix elements operable to receive the control signal and maintain the amount of radiation emitted from the pixel. - View Dependent Claims (28, 29, 30)
-
Specification