Back to results
US 9,870,737 B2Granted
Sensing circuit and organic light emitting diode display device having the same
AssigneeLG Display Co., Ltd.
InventorsChulWon Lee, SeungTae Kim
Life of this patent
Estimating the term…
Abstract
A sensing circuit capable of simplifying a configuration of a data driver by reducing a size of a sensing circuit provided at each data driver, and an organic light emitting diode (OLED) display device having the same are provided. The sensing circuit includes N sampling and holding circuits, a scaler and an analog-digital converter.
Claims15
A sensing circuit comprising:
- N sampling and holding circuits to output a plurality of sampling voltages from a plurality of sensing voltages sequentially input through a plurality of reference lines, where N is a positive integer;
- a single scaler commonly connected to the N sampling circuits to output a plurality of scaling voltages from the plurality of sampling voltages;
- an analog-digital converter to perform an analog-digital conversion for the plurality of scaling voltages so as to output a plurality of sensing data;
- and
- a plurality of switches disposed between the N sampling and holding circuits and the single scaler and provided by the same number as the N sampling and holding circuits,
- wherein the plurality of switches are sequentially turned on to output the sampling voltages to the single scaler.
3 more elements
An organic light emitting diode (OLED) display device, comprising:
- a display panel provided with a plurality of pixels, and a plurality of reference lines connected to the plurality of pixels, respectively, each of the pixel having an organic light emitting diode;
- a plurality of data drivers each provided with a sensing circuit to output sensing data from sensing voltages applied through the plurality of reference lines;
- and
- a timing controller to generate a compensation image data from image data according to the sensing data, and output the compensation image data to the display panel through the data driver,
- wherein the sensing circuit comprises:
- N sampling and holding circuits to output a plurality of sampling voltages from a plurality of sensing voltages sequentially input through the plurality of reference lines, where N is a positive integer;
- a single scaler commonly connected to each of the N sampling circuits to output a plurality of scaling voltages from the plurality of sampling voltages;
- an analog-digital converter to perform an analog-digital conversion for the plurality of scaling voltages so as to output a plurality of sensing data;
- and
- a plurality of switches disposed between the N sampling and holding circuits and the single scaler and provided by the same number as the N sampling and holding circuits,
- wherein the plurality of switches are sequentially turned on to output the sampling voltages to the single scale.
8 more elements
Dependencies are inferred from the claim text.