DISPLAY DEVICE

• US 20150070343A1
• Filed: 03/11/2014
• Published: 03/12/2015
• Est. Priority Date: 09/12/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: LEE, Eun Ho, PARK, Cheol Woo, PARK, Su Hyeong, KIM, Jung Taek, JEONG, Ji Woong
• Granted Patent: US 9,418,584 B2
• Time in Patent Office: Days
• US Class Current: 345/212
• CPC Class Codes: G09G 2310/0213 controlling the sequence of the scanning lines with respect to the patterns to be displayed, e.g. to save power
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters

Abstract

A display device includes a display panel including a plurality of scan lines, a plurality of data lines which crosses the plurality of scan lines, and a plurality of pixels that is connected to the plurality of scan lines and the plurality of data lines, a scan driving unit which provides a plurality of scan signals, each of which includes a scan-on signal and a scan-off signal, to the plurality of scan lines, a data driving unit that provides data voltages to the plurality of data lines, and a timing control unit that determines an order in which the scan signals are provided to the plurality of scan lines, where the scan-on signal is provided to each of the plurality of scan lines based on an order of averages of the data voltages transferred to the pixels connected thereto.

Claims

1. A display device comprising:

a display panel comprising a plurality of scan lines, a plurality of data lines which crosses the plurality of scan lines, and a plurality of pixels which is connected to the plurality of scan lines and the plurality of data lines;

a scan driving unit which provides a plurality of scan signals, each of which comprises a scan-on signal and a scan-off signal, to the plurality of scan lines;

a data driving unit which provides a plurality of data voltages to the plurality of data lines; and

a timing control unit which determines an order in which the plurality of scan signals is provided to the plurality of scan lines,

wherein the scan-on signal is provided to each of the plurality of scan lines based on an order of averages of the data voltages to be transferred to the pixels connected thereto.

2. The display device of claim 1, wherein when the scan-on signal is transferred to the pixels connected to a scan line of the plurality of scan lines, the pixels connected to the scan line receive the data voltages applied to the data lines connected thereto in response to the scan-on signal.

3. The display device of claim 1, wherein the timing control unit comprises:

a scan order determination unit which receives an image data, obtains the order of the averages of the data voltages based on the image data, and determines a scan order corresponding to the order of the averages of the data voltages;

a scan driving unit control unit which generates a scan order control signal for controlling the scan driving unit to sequentially apply the scan-on signals to the plurality of scan lines in the scan order; and

an image data rearrangement unit which rearranges the image data to correspond to the scan order and provides the rearranged image data to the data driving unit.

4. The display device of claim 3, wherein the scan driving unit comprises:

a scan signal generation unit which generates a plurality of original scan signals, each of which comprises the scan-on signal and the scan-off signal; and

a scan signal rearrangement unit which rearranges the plurality of original scan signals based on the scan order control signal and outputs the plurality of scan signals.

5. The display device of claim 1, wherein the scan-on signal is provided to each of the plurality of scan lines based on a descending order of the averages of the data voltages.

6. The display device of claim 1, wherein the scan-on signal is provided to each of the plurality of scan lines based on an ascending order of the averages of the data voltages.

7. A display device comprising:

a display panel comprising a plurality of scan lines which are divided into a plurality of groups, a plurality of data lines which crosses the plurality of scan lines, and a plurality of pixels which is connected to the plurality of scan lines and the plurality of data lines;

a scan driving unit which provides a plurality of scan signals, each of which comprises a scan-on signal and a scan-off signal, to the plurality of scan lines;

a data driving unit which provides a plurality of data voltages to the plurality of data lines; and

a timing control unit which determines an order in which the plurality of scan signals is provided to the plurality of scan lines,

wherein

the scan driving unit sequentially provides the plurality of scan signals to the plurality of groups, and

the scan-on signal is provided to the scan lines in each of the plurality of groups based on an order of averages of the data voltages to be transferred to the pixels connected thereto.

8. The display device of claim 7, wherein

the plurality of scan lines comprises first to n-th scan lines, wherein n is a natural number,

the plurality of groups comprises first to p-th groups, wherein p is a natural number less than n,

the first scan line is in the first group, and

the scan driving unit provides the scan-on signal firstly to the first group among the first to q-th groups in a frame.

9. The display device of claim 8, wherein

the scan-on signal is applied firstly to a scan line, an average of the data voltages applied to the pixels connected to which is closest to an average of the data voltages transferred lastly to the pixels connected to the scan lines in the q-th group, among the scan lines in the (q+1)-th group,

wherein q is a natural number equal to or greater than 2, and equal to or less than p.

10. The display device of claim 8, wherein the scan driving unit provides the scan-on signal firstly to the first scan line in the first group in the frame.

11. The display device of claim 7, wherein the timing control unit comprises:

a scan order determination unit which receives an image data, obtains the order of the averages of the data voltages based on the image data, and determines a scan order based on the order of the averages of the data voltages;

a scan driving unit control unit which generates a scan order control signal for controlling the scan driving unit to sequentially apply the scan-on signal to each of the plurality of scan lines based on the scan order; and

an image data rearrangement unit which rearranges the image data to correspond to the scan order and provides the rearranged image data to the data driving unit.

12. The display device of claim 11, wherein the scan driving unit comprises:

a scan signal generation unit which generates a plurality of original scan signals, each of which comprises the scan-on signal and the scan-off signal; and

a scan signal rearrangement unit which rearranges the plurality of original scan signals based on the scan order control signal and outputs the plurality of scan signals.

13. The display device of claim 12, wherein

the plurality of scan lines comprises first to n-th scan lines,

the plurality of original scan signals comprises first to n-th original scan signals,

the plurality of groups comprises first to p-th groups,

the scan signal rearrangement unit includes first to p-th sub-units, and

the q-th sub-unit receives a-th to b-th original scan signals and generates a-th to b-th scan signals through rearrangement of the a-th to b-th original scan signals,

wherein n is a natural number, p is a natural number less than n, q is a natural number equal to or less than p, a is a natural number, and b is a natural number greater than a.

14. A display device comprising:

a display panel comprising a plurality of scan lines which is divided into a plurality of groups, a plurality of data lines which crosses the plurality of scan lines, and a plurality of pixels which is connected to the plurality of scan lines and the plurality of data lines;

a scan driving unit which provides a plurality of scan signals, each of which comprises a scan-on signal and a scan-off signal, to the plurality of scan lines;

a data driving unit which provides a plurality of data voltages to the plurality of data lines; and

a timing control unit which determines an order in which the plurality of scan signals is provided to the plurality of scan lines,

wherein

the scan driving unit sequentially provides the plurality of scan signals to the plurality of groups, and

the scan-on signal is provided to the scan lines in each of the plurality of groups in an order, which is determined based on an order of averages of the data voltages to be transferred to the pixels connected thereto, wherein the order of the averages of the data voltage is an ascending order or a descending order.

15. The display device of claim 14, wherein

the plurality of scan lines comprises first to n-th scan lines,

the plurality of groups comprises first to p-th groups,

the first scan line is in the first group,

the scan driving unit provides the scan-on signal firstly to the first group among the first to q-th groups in one frame,

n is a natural number equal to or greater than 2, and

p is a natural number less than n.

16. The display device of claim 15, wherein

the scan driving unit provides the scan-on signal to each of the scan lines in the q-th group based on the ascending order of the averages of the data voltages transferred to the pixels connected to the scan lines in the q-th group,

the scan driving unit provides the scan-on signal to each of the scan lines in the (q+1)-th group based on the descending order of the averages of the data voltages transferred to the pixels connected to the scan lines in the (q+1)-th group, and

q is a natural number equal to or less than p−

1.

17. The display device of claim 15, wherein

the scan driving unit provides the scan-on signals to each of the scan lines in the q-th group based on the descending order of the averages of the data voltages transferred to the pixels connected to the each of the scan lines in the q-th group,

the scan driving unit provides the scan-on signal to each of the scan lines in the (q+1)-th group based on the ascending order of the averages of the data voltages transferred to the pixels connected to the each of the scan lines in the (q+1)-th group, and

q is a natural number equal to or less than p−

1.

18. The display device of claim 14, wherein the timing control unit comprises:

a scan order determination unit which receives an image data, obtains the order of the averages of the data voltages based on the image data, and determines a scan order based on the order of the averages of the data voltages;

a scan driving unit control unit which generates a scan order control signal for controlling the scan driving unit to sequentially apply the plurality of scan-on signals to the plurality of scan lines to correspond to the scan order; and

an image data rearrangement unit which rearranges the image data to correspond to the scan order and provides the rearranged image data to the data driving unit.

19. The display device of claim 18, wherein the scan driving unit comprises:

a scan signal generation unit which generates a plurality of original scan signals, each of which comprises the scan-on signal and the scan-off signal; and

a scan signal rearrangement unit which rearranges the plurality of original scan signals based on the scan order control signal and outputs the plurality of scan signals,

wherein

the plurality of scan lines comprises first to n-th scan lines,

the plurality of original scan signals comprises first to n-th original scan signals,

the plurality of groups comprises first to p-th groups,

the scan signal rearrangement unit comprises first to p-th sub-units,

the q-th sub-unit receives a-th to b-th original scan signals and generates a-th to b-th scan signals through rearrangement of the a-th to b-th original scan signals, and

n is a natural number, p is a natural less than n, q is a natural equal to or less than p, a is a natural number, and b is a natural number greater than a.