# US 2014/0198139 A1 · Timing controller of display device and method for driving the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0198139 A1
- Document ID: US20140198139A1
- Status: Published application
- Kind: A1
- Application number: 13/937,935
- Filed: 2013-07-09
- Published: 2014-07-17
- Earliest claimed: 2013-01-16
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Seock-Cheon SONG
- Web page: https://patentgrep.com/patent/US20140198139A1

## CPC

- G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED]
- G09G 5/008: {Clock recovery}
- G09G 5/18: Timing circuits for raster scan displays (specially adapted for television H04N {; synchronisation between the display unit and other display units, videodisc player G09G5/12})
- G09G 2320/0223: Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
- G09G 2320/0247: Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

In a timing controller capable of decreasing flicker of an image to be displayed and a method of driving the same, the timing controller includes: a timing signal generator outputting a scan starting signal and clock signals to a scan driving unit; a sensing unit sensing status transition time points of the scan starting signal and the scan signal outputted from the scan driving unit for a plurality of frame periods; an estimator estimating a delay value and a jitter value with respect to the status transition time points; and an off-set signal generator generating an off-set signal for controlling the scan starting signal or the clock signals based on the delay value and the jitter value. The timing signal generator, in response to the off-set signal, regulates timings of the scan starting signal and the clock signals.

## Claims

### Claim 1

A timing controller, comprising:
a timing signal generator for outputting a scan starting signal and clock signals to a scan driving unit;
a sensing unit for sensing status transition time points of the scan starting signal and the scan signal outputted from the scan driving unit for a plurality of frame periods;
an estimator for estimating a delay value and a jitter value with respect to the status transition time points; and
an off-set signal generator for generating an off-set signal for controlling one of the scan starting signal and the clock signals based on the delay value and the jitter value;
wherein the timing signal generator, in response to the off-set signal, regulates timings of the scan starting signal and the clock signals.

### Claim 2 (depends on 1)

The timing controller as claimed in claim 1, wherein the timing signal generator comprises:
a controlling unit responsive to the off-set signal for outputting a scan control signal for regulating a timing of the scan starting signal and a clock control signal for regulating a timing of the clock signals;
a scan starting signal generating unit responsive to the scan control signal for regulating the timing of the scan starting signal and for outputting the regulated timing to the scan driving unit; and
a clock signal generating unit responsive to the clock control signal for regulating the timings of the clock signals and for outputting the regulating timings thereof to the scan driving unit.

### Claim 3 (depends on 1)

The timing controller as claimed in claim 1, wherein the status transition time points include rising edge time points and lowering edge time points.

### Claim 4 (depends on 1)

The timing controller as claimed in claim 1, wherein each of the delay values is an average value of differences between the status transition time points and a reference time point.

### Claim 5 (depends on 1)

The timing controller as claimed in claim 1, wherein each of the jitter values is an absolute value of the largest one of differences between the status transition time points and a reference time point.

### Claim 6 (depends on 1)

The timing controller as claimed in claim 1, wherein the off-set signal is any one of a delay off-set signal, a jitter off-set signal, and a signal continuing signal off-set signal.

### Claim 7 (depends on 6)

The timing controller as claimed in claim 6, wherein the delay off-set signal corresponds to a difference between a delay value of lowering edge time points of the scan starting signal and a delay value of lowering edge time points of the scan signal.

### Claim 8 (depends on 6)

The timing controller as claimed in claim 6, wherein the jitter off-set signal corresponds to one of a jitter value of the scan starting signal and a jitter value of the scan signal.

### Claim 9 (depends on 6)

The timing controller as claimed in claim 6, wherein the signal continuing signal off-set signal corresponds to a difference between a delay value of rising edge time points and a delay value of lowering edge time points of the scan signal.

### Claim 10

A method of driving a timing controller, comprising the steps of:
sensing status transition time points of a scan starting signal outputted from a scan driving unit and a scan signal outputted from the scan driving unit for a plurality of frame periods;
estimating delay values and jitter values with respect to the status transition time points for the plurality frame periods; and
regulating timing of one of the scan signal and clock signals outputted to the scan driving unit based on the delay values and the jitter values.

### Claim 11 (depends on 10)

The method of driving a timing controller as claimed in claim 10, wherein the status transition time points include rising edge time points and lowering edge time points.

### Claim 12 (depends on 10)

The method of driving a timing controller as claimed in claim 10, wherein each of the delay values is an average value of differences between the status transition time points and a reference time point.

### Claim 13 (depends on 10)

The method of driving a timing controller as claimed in claim 10, wherein the jitter values are an absolute value of the largest one of differences between the status transition time points and a reference time point.

### Claim 14 (depends on 10)

The method of driving a timing controller as claimed in claim 10, wherein the step of regulating timing comprises:
generating a delay off-set signal corresponding to a difference between a delay value of lowering edge time points of the scan starting signal and a delay value of lowering edge time points of the scan signal; and
regulating timing of said one of the scan signal and the clock signals outputted to the scan driving unit in response to the delay off-set signal.

### Claim 15 (depends on 10)

The method of driving a timing controller as claimed in claim 10, wherein the step of regulating timing comprises:
generating a jitter off-set signal corresponding to one of a jitter value of the scan starting signal and a jitter value of the scan signal; and
regulating timing of said one of the scan signal and the clock signals outputted to the scan driving unit in response to the jitter off-set signal.

### Claim 16 (depends on 10)

The method of driving a timing controller as claimed in claim 10, wherein the step of regulating timing comprises:
generating a signal continuing time off-set signal corresponding to a difference between a delay value of lowering edge time points and a delay value of rising edge time points of the scan signal; and
regulating timing of said one of the scan signal and the clock signals outputted to the scan driving unit in response to the signal continuing time off-set signal.