Patent
Display driver circuits
Euan Smith,Paul Richard Routley +1 more
- 14 Mar 2003
243
TL;DR: In this paper, display driver circuits for electro-optic displays, and more particularly related to circuits and methods for driving active matrix organic light emitting diode displays with greater efficiency are discussed.
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Abstract: This disclosure generally relates to display driver circuits for electro-optic displays, and more particularly relates to circuits and methods for driving active matrix organic light emitting diode displays with greater efficiency. A display driver for an electroluminescent display, the display including a plurality of electroluminescent display elements each associated with a display element driver circuit, each display element driver circuit including a drive transistor having a control connection for driving the associated display element in accordance with a voltage on the control connection, the display driver including at least one display element brightness controller to provide an output to drive a control connection to control the electroluminescent output from a display element; a voltage sensor to sense the voltage on a control connection; and a power controller for controlling an adjustable power supply for providing an adjustable voltage to the electroluminescent display to power said drive transistors for driving said display elements, the power controller being configured to provide a control signal to adjust said power supply voltage in response to said sensed voltage.
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Citations
Patent
Organic light emitting display and driving method thereof
Oh-Kyong Kwon
- 08 Apr 2008
TL;DR: In this paper, an organic light emitting display capable of displaying an image with uniform luminance regardless of deterioration of an organic LEM and threshold voltage and/or mobility of a drive transistor is disclosed.
410
Patent
Active matrix display devices
Martin John Edwards
- 28 Feb 2005
TL;DR: In this paper, an active matrix LED display has a light-dependent device for detecting the brightness of the display element and threshold voltage measurement circuitry for measuring a threshold voltage of a pixel the drive transistor.
376
Patent
Light sensitive display
Adiel Abileah,Willem den Boer,Pat Green +2 more
- 26 Oct 2007
TL;DR: In this paper, a photo transistor is connected to a conductive electrode free from additional electrical elements there between and the second terminal of the first transistor is maintained at the same potential as the conductive electrodes.
338
Patent
Electroluminescent display devices
Nigel D. Philips Ip Standards Young
- 22 Aug 2003
TL;DR: In this article, a voltage-programmed current source circuit, a drive transistor and a light sensitive device for sensing the display element light output are used to control the voltage provided to the gate of the drive transistor.
327
Patent
OLED display with aging compensation
Ronald S. Cok,Felipe Antonio Leon +1 more
- 31 Jan 2003
TL;DR: An organic light emitting diode (OLED) display includes an array of OLEDs, each OLED having two terminals; a voltage sensing circuit for each OLED including a transistor in each circuit connected to one of the terminals of a corresponding OLED to produce feedback signals representing the voltage across the OLEDs; and a controller responsive to the feedback signals for calculating a correction signal for each display and applying the correction signal to data used to drive each OLED to compensate for the changes in the output of each OLED as discussed by the authors.
302
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Patent
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TL;DR: In this paper, the use of current mirror circuits improved uniformity of light outputs from the display elements in an active matrix electroluminescent display device, which is an array of current-driven ELC display elements.
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Patent
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Patent
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345
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