IP Library Granted Patent US 11,227,537
Granted Patent B2
US 11,227,537 · App. 16/829,954 · Granted Jan 18, 2022

Display device for masking clock signals in different modes

Inventors: Chang Noh Yoon (Yongin-si, KR); Hae Kwan Seo (Yongin-si, KR); Won Tae Kim (Yongin-si, KR)
Assignee: Samsung Display Co., Ltd.
G09G3/32G09G2330/021
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 11,227,537
App. No.
16/829,954
Granted
Jan 18, 2022
Kind
B2
Abstract

A display device includes a timing controller configured to generate clock signals, a start signal, and image data. A scan driver includes a plurality of stages configured to sequentially output the clock signals as scan signals in response to the start signal. A data driver is configured to generate a data signal based on the image data. A display unit includes pixels configured to emit light with luminance corresponding to the data signal in response to the scan signal. The timing controller is to mask at least one of the clock signals in a first section, a second section, and a third section included in one frame section and spaced from each other.

Claims (64)

1. A display device comprising:

a timing controller configured to generate clock signals, a start signal, and image data;

a scan driver comprising a plurality of stages configured to sequentially output the clock signals as scan signals in response to the start signal;

a data driver configured to generate a data signal based on the image data; and

a display unit comprising a plurality of pixels configured to emit light with luminance corresponding to the data signal in response to the scan signals,

wherein the timing controller is configured to mask, while the data driver generates the data signal based on the image data, at least one of the clock signals in a first period, a second period, and a third period included in one frame period and spaced from each other,

wherein the clock signals comprise a first clock signal and a second clock signal, and

wherein, in the first period of the one frame period, the timing controller is to mask the second clock signal and is not to mask the first clock signal.

2. The display device of claim 1 , wherein each of the plurality of stages is to output a clock signal of the clock signals as a scan signal of the scan signals in response to a carry signal,

wherein a first stage of the plurality of stages is to receive the start signal as the carry signal, and

wherein remaining stages of the plurality of stages other than the first stage is to receive a scan signal of a previous stage of the plurality of stages as the carry signal.

3. The display device of claim 2 , wherein:

the first clock signal has a pulse waveform, and

the second clock signal is a signal in which the first clock signal is shifted by a half period.

4. The display device of claim 3 , wherein:

the first stage of the plurality of stages is to output the second clock signal as the scan signal, and

a second stage of the plurality of stages adjacent to the first stage is to output the first clock signal as the scan signal.

5. The display device of claim 3 , wherein the second clock signal comprises a pulse having a first voltage level between a first time point and a second time point and is maintained at a second voltage level different from the first voltage level between a third time point and a fourth time point,

wherein the first time point, the second time point, the third time point, and the fourth time point are sequentially spaced by a half period of the second clock signal, and

wherein the third time point and the fourth time point are in the first period.

6. The display device of claim 5 , wherein the first clock signal comprises a pulse having the first voltage level between the second time point and the third time point and a pulse having the first voltage level between the fourth time point and a fifth time point, and

wherein the fifth time point is spaced from the fourth time point by a half period of the first clock signal.

7. The display device of claim 3 , wherein the first period corresponds to at least one stage of the plurality of stages.

8. The display device of claim 7 , wherein the first period is smaller than a period of the first clock signal.

9. The display device of claim 3 , wherein the timing controller is to mask at least one of the first clock signal and the second clock signal in the second period.

10. The display device of claim 9 , wherein the second period is greater than a period of the first clock signal.

11. The display device of claim 3 , wherein the timing controller is to mask at least one of the first clock signal and the second clock signal in the third period.

12. The display device of claim 11 , wherein the third period is greater than a period of the first clock signal.

13. A display device comprising:

a timing controller configured to generate clock signals, a start signal, and image data;

a scan driver comprising a plurality of stages configured to sequentially output the clock signals as scan signals in response to the start signal;

a data driver configured to generate a data signal based on the image data; and

a display unit comprising a plurality of pixels configured to emit light with luminance corresponding to the data signal in response to the scan signals, wherein:

the timing controller is configured to mask, while the data driver generates the data signal based on the image data, at least one of the clock signals in a first period, a second period, and a third period included in one frame period and spaced from each other;

each of the plurality of stages is to output a clock signal of the clock signals as a scan signal of the scan signals in response to a carry signal;

a first stage of the plurality of stages is to receive the start signal as the carry signal;

remaining stages of the plurality of stages other than the first stage is to receive a scan signal of a previous stage of the plurality of stages as the carry signal;

the clock signal comprises a first clock signal and a second clock signal;

the first clock signal has a pulse waveform;

the second clock signal is a signal in which the first clock signal is shifted by a half period; and

each of the first clock signal and the second clock signal has at least one pulse between the second period and the third period.

14. A display device comprising:

a timing controller configured to generate clock signals, a start signal, and image data;

a scan driver comprising a plurality of stages configured to sequentially output the clock signals as scan signals in response to the start signal;

a data driver configured to generate a data signal based on the image data; and

a display unit comprising a plurality of pixels configured to emit light with luminance corresponding to the data signal in response to the scan signals,

wherein the timing controller is configured to mask at least one of the clock signals in a first period, a second period, and a third period included in one frame period and spaced from each other, and

wherein the timing controller is to output pulses of a clock signal of the clock signals in a first mode, to mask at least one of the pulses of the clock signal in the first period, the second period, and the third period in a second mode, and to periodically perform a mode conversion between the first mode and the second mode.

15. The display device of claim 14 , wherein each of the pixels of the plurality of pixels comprises:

a light-emitting element;

a first transistor comprising a first electrode connected to a first power source, a second electrode connected to a first node, a gate electrode connected to a second node, and a body configured to receive a common control voltage;

a second transistor configured to transmit the data signal to the second node in response to a scan signal of the scan signals; and

a third transistor connecting the first node and the light-emitting element.

16. The display device of claim 15 , wherein the common control voltage having a first voltage level is applied to the pixels in the first mode, and

wherein the common control voltage having a second voltage level different from the first voltage level is applied to some of the pixels in the second mode.

17. The display device of claim 15 , wherein the display unit comprises a first pixel region and a second pixel region that are separated from each other,

wherein each of first pixels in the first pixel region from among the pixels is connected to a first common control line to receive the common control voltage, and

wherein each of second pixels in the second pixel region from among the pixels is connected to a second common control line to receive the common control voltage.

18. A display device comprising:

a timing controller configured to generate a first clock signal, a second clock signal, a start signal, and image data;

a scan driver comprising a plurality of stages, wherein the stages are to sequentially output a first scan signal corresponding to the start signal based on the first clock signal and to output a second scan signal corresponding to the first scan signal based on the second clock signal;

a data driver configured to generate a data signal based on the image data; and

a display unit comprising pixels, wherein each of the pixels is configured to be initialized in response to the first scan signal and to emit light with luminance corresponding to the data signal in response to the second scan signal,

wherein the timing controller is to mask at least one of the first clock signal and the second clock signal in a first period included in one frame period.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 25, 2020
From: YOON, CHANG NOH; SEO, HAE KWAN; KIM, WON TAE
To: SAMSUNG DISPLAY CO., LTD.
Reel/Frame 052228/0008 →
Priority Claims (1)
KR 10-2019-0091244 · Jul 26, 2019 · national
Continuity (1)
Related Publication 20210027697A1 · Jan 28, 2021