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Assignee: Leadis Technology, Inc.


Location: Sunnyvale, CA, US
No. of applications: 10

Application No.Application TitleIssue Date
20100277400CORRECTION OF AGING IN AMOLED DISPLAY
The data line voltage on the data line of the AMOLED sub-pixels is measured while the OLED is being driven by a reference current, in order to determine the age of the OLED in the sub-pixel. The pixel transistor serves as a current source for driving the OLED in the sub...
11/04/2010
20100065341DRIVING SCANNED CHANNEL AND NON-SCANNED CHANNELS OF A TOUCH SENSOR WITH SAME AMPLITUDE AND SAME PHASE
The scanned channel and the non-scanned channels of a capacitive touch sensor are driven by a scan signal and a shield signal, respectively, with the shield signal having a substantially same amplitude and a substantially same phase as the amplitude and the phase, respe...
03/18/2010
20090267914MULTI-TOUCH TOUCH SCREEN WITH SINGLE-LAYER ITO BARS ARRANGED IN PARALLEL
A touch screen includes a plurality of single-layer ITO bars having a substantially rectangular shape and arranged in parallel to each other in order to detect touches on the touch screen. The location of a touch on the touch screen in the direction along an ITO bar is ...
10/29/2009
20090225044DETERMINING TOUCH ON KEYS OF TOUCH SENSITIVE INPUT DEVICE
A key is determined to be the user-selected key of a touch sensitive input device if the touch on the key is determined to be valid continuously for longer than a first predetermined period of time. Another key may be determined to the user-selected key, replacing the p...
09/10/2009
20090213049CORRECTION OF TFT NON-UNIFORMITY IN AMOLED DISPLAY
Sub-pixel current in an OLED display is forced to converge to a desired level regardless of the source of pixel current error. By using a feedback loop, the pixel transistor current is forced to be equal to a predetermined target current that is established by an analog...
08/27/2009
20090195483USING STANDARD CURRENT CURVES TO CORRECT NON-UNIFORMITY IN ACTIVE MATRIX EMISSIVE DISPLAYS
A plurality of gray level versus OLED current curves are generated by measuring many OLED panels from a stable manufacturing process, and those curves are stored as standard gray level versus OLED current curves. When a new OLED display is manufactured from the process,...
08/06/2009
20090174686COMBINED TOUCH SENSOR AND LED DRIVER WITH N-TYPE MOSFET PROTECTING TOUCH SENSOR
A combined touch sensor and light-emitting-diode (LED) driver comprises a touch sensor circuit configured to detect a touch, where the touch sensor circuit is coupled to a common node and configured to operate with a first operating voltage, an LED driver circuit config...
07/09/2009
20090073096PROGRAMMABLE LED DRIVER
An LED driver includes an embedded non-volatile memory (NVM) capable of being programmed and storing control data for setting a variety of features of the LED driver, such as the maximum current for driving the LEDs, analog parameters such as the resistance of the inter...
03/19/2009
20090066665Device and Method for Driving a Touch Pad
Provided are a device for driving a touch pad, including: an input unit that receives an electrical signal be touching from channels of the touch pad; and a control logic unit that scans the channels. The control logic unit includes a channel selection section which div...
03/12/2009
20080315955CLASS L AMPLIFIER
A new Class L amplifier which dynamically switches between multiple pairs of power rails, and has the ability to select the most advantageous combination of rails for the minimization of power dissipation in the amplifier. In one embodiment, a bridged amplifier system i...
12/25/2008
 
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