CN-113920931-B - Display device and method of driving display panel

Abstract

A display apparatus and a method of driving a display panel are provided. The display device includes a display panel, a data driver, and a frequency controller. The display panel displays an image based on the input image data. The data driver outputs a data voltage to the display panel. The frequency controller determines a driving frequency of the display panel based on the input image data and the play speed setting.

Inventors

• Pu Shihe
• JIN HONGZHU
• LU ZHENYONG
• LI XIAOZHEN
• LIN ZAIJIN

Assignees

• 三星显示有限公司

Dates

Publication Date

20260505

Application Date

20210616

Priority Date

20200708

Claims (17)

1. 1. A display device, the display device comprising: A display panel that displays an image based on input image data; a data driver for outputting data voltages to the display panel, and A frequency controller that determines a driving frequency of the display panel based on the input image data and a play speed setting, Wherein the frequency controller includes: A play mode determiner determining whether the play speed setting is less than 1.0 times; A still image determiner that determines whether the input image data is a still image or a moving image when the play speed setting is equal to or greater than 1.0 times; A flicker value memory for storing a flicker value related to a gray value of the input image data, and And a driving frequency determiner that determines the driving frequency of the display panel based on the flicker value and the play speed setting.
2. 2. The display device according to claim 1, wherein the driving frequency determiner includes: A first frequency determiner that determines a first frequency based on the flicker value; A second frequency determiner for determining a second frequency based on the play speed setting, and A frequency comparator that compares the first frequency and the second frequency and determines that the driving frequency of the display panel is a larger value among the first frequency and the second frequency.
3. 3. The display device according to claim 2, Wherein the first frequency is determined based on the flicker value representing a degree to which flicker of the gradation value for the input image data occurs, Wherein when the degree of occurrence of the flicker is high, the first frequency is set to be high, and Wherein the first frequency is set to be low when the degree to which flicker occurs is low.
4. 4. The display device according to claim 2, Wherein the second frequency is determined by multiplying the play speed setting by an input frequency of the input image data, Wherein when the play speed is set high, the second frequency is set high, and Wherein when the play speed is set low, the second frequency is set low.
5. 5. The display device according to claim 2, wherein the driving frequency determiner determines the first frequency and the second frequency when the play speed setting is less than 1.0 times.
6. 6. The display device according to claim 5, Wherein when the play speed setting is less than 1.0 times and the first frequency is equal to or greater than the second frequency, the drive frequency determiner outputs a data signal to the data driver at the first frequency, and Wherein the driving frequency determiner outputs the data signal to the data driver at the second frequency when the play speed setting is less than 1.0 times and the first frequency is less than the second frequency.
7. 7. The display apparatus according to claim 1, wherein the driving frequency determiner determines the driving frequency of the display panel based on the flicker value when the input image data is a still image or the play speed setting is less than 1.0 times.
8. 8.A display device, the display device comprising: A display panel that displays an image based on input image data; a data driver for outputting data voltages to the display panel, and A frequency controller that determines a driving frequency of the display panel based on the input image data and a play speed setting, Wherein the display panel comprises a plurality of sections, and Wherein the frequency controller includes: A play mode determiner determining whether the play speed setting is less than 1.0 times; A still image determiner that determines whether the input image data is a still image or a moving image when the play speed setting is equal to or greater than 1.0 times; A flicker value memory for storing a flicker value related to a gray value of the input image data, and And a driving frequency determiner that determines the driving frequency of the display panel based on the play speed setting and flicker values corresponding to the plurality of sections.
9. 9. The display device according to claim 8, wherein the frequency controller determines the flicker value of each of the plurality of sections, and determines that the driving frequency of the display panel is a maximum driving frequency in which flicker is not shown to a user based on the flicker value of the each of the plurality of sections.
10. 10. A method of driving a display panel, the method comprising: Determining a driving frequency of the display panel using a frequency controller, and Outputting a data voltage to the display panel based on the driving frequency, Wherein the frequency controller determines the driving frequency of the display panel based on input image data and a play speed setting, and Wherein the step of determining the driving frequency of the display panel includes determining a first frequency based on a flicker value related to a gray level value of the input image data when the play speed setting is less than 1.0 times, and determining a second frequency based on the play speed setting.
11. 11. The method of claim 10, wherein the determining the driving frequency of the display panel includes determining whether the input image data is a moving image or a still image when the play speed setting is equal to or greater than 1.0 times.
12. 12. The method of claim 11, wherein the determining the driving frequency of the display panel further comprises: When the play speed setting is equal to or greater than 1.0 times and the input image data is a moving image, determining that the driving frequency of the display panel is an input frequency of the input image data, and When the play speed setting is equal to or greater than 1.0 times and the input image data is a still image, the driving frequency of the display panel is determined based on a flicker value related to a gradation value of the input image data.
13. 13. The method of claim 10, wherein the determining the driving frequency of the display panel further comprises: Determining the driving frequency of the display panel to be the first frequency when the play speed setting is less than 1.0 times and the first frequency is equal to or greater than the second frequency, and When the play speed setting is less than 1.0 times and the first frequency is less than the second frequency, determining the driving frequency of the display panel to be the second frequency.
14. 14. The method according to claim 10, Wherein the first frequency is determined based on the flicker value representing a degree to which flicker of the gradation value for the input image data occurs, Wherein when the degree of occurrence of the flicker is high, the first frequency is set to be high, and Wherein the first frequency is set to be low when the degree to which the flicker occurs is low.
15. 15. The method according to claim 10, Wherein the second frequency is determined by multiplying the play speed setting by an input frequency of the input image data, Wherein when the play speed is set high, the second frequency is set high, and And when the playing speed is set to be low, setting the second frequency to be low.
16. 16. The method of claim 10, wherein the driving frequency of the display panel is determined based on a flicker value related to a gray value of the input image data when the input image data is a still image or the play speed setting is less than 1.0 times.
17. 17. The method of claim 10, the method further comprising: Dividing the display panel into a plurality of sections, and Determining flicker values corresponding to the plurality of segments, Wherein the driving frequency of the display panel is determined based on the play speed setting and the flicker values corresponding to the plurality of sections.

Description

Display device and method of driving display panel Technical Field Embodiments of the invention relate to a display device and a method of driving a display panel of the display device. More particularly, embodiments of the invention relate to a display device having reduced power consumption and improved display quality and a method of driving a display panel of the display device. Background Methods of minimizing power consumption of information technology ("IT") products such as tablet personal computers ("PCs") and notebook PCs have been studied. In order to minimize power consumption of an IT product including a display panel, IT may be desirable to minimize power consumption of the display panel. The display device may include a frequency control part to drive the display panel at a relatively low driving frequency when the display panel displays a still image. In an actual user environment using a display device, the display panel of the display device displays moving images more frequently than still images, and is generally used for viewing an internet lecture for learning. In this case, the power consumption of the display device may not be sufficiently reduced. Disclosure of Invention Embodiments of the invention provide a display device capable of reducing power consumption of the display device and improving display quality of a display panel. The embodiment of the invention also provides a method for driving the display panel by using the display device. In an embodiment of the display device according to the invention, the display device comprises a display panel, a data driver and a frequency controller. In such an embodiment, the display panel displays an image based on the input image data, the data driver outputs a data voltage to the display panel, and the frequency controller determines a driving frequency of the display panel based on the input image data and the play speed setting. In an embodiment, the frequency controller may include a play mode determiner determining whether a play speed setting is less than 1.0 times, a still image determiner determining whether input image data is a still image or a moving image when the play speed setting is equal to or greater than 1.0 times, a flicker value memory storing a flicker value related to a gray value of the input image data, and a driving frequency determiner determining a driving frequency of the display panel based on the flicker value and the play speed setting. In an embodiment, the driving frequency determiner may include a first frequency determiner to determine a first frequency based on the flicker value, a second frequency determiner to determine a second frequency based on the play speed setting, and a frequency comparator to compare the first frequency and the second frequency and determine that the driving frequency of the display panel is a larger value among the first frequency and the second frequency. In an embodiment, the first frequency may be determined based on a flicker value representing a degree to which flicker of a gray value for the input image data occurs. In such an embodiment, the first frequency may be set high when the degree to which flicker occurs is high. In such an embodiment, the first frequency may be set low when the degree to which flicker occurs is low. In an embodiment, the second frequency may be determined by multiplying the play speed setting by the input frequency of the input image data. When the play speed is set high, the second frequency may be set high. When the play speed setting is low, the second frequency may be set low. In an embodiment, the driving frequency determiner may determine the first frequency and the second frequency when the play speed setting is less than 1.0 times. In an embodiment, when the play speed setting is less than 1.0 times and the first frequency is equal to or greater than the second frequency, the driving frequency determiner may output the data signal to the data driver at the first frequency. In such an embodiment, the driving frequency determiner may output the data signal to the data driver at the second frequency when the play speed setting is less than 1.0 times and the first frequency is less than the second frequency. In an embodiment, when the input image data is a still image or the play speed setting is less than 1.0 times, the driving frequency determiner may determine the driving frequency of the display panel based on the flicker value. In an embodiment, the display panel may include a plurality of sections. In such an embodiment, the frequency controller may include a play mode determiner determining whether the play speed setting is less than 1.0 times, a still image determiner determining whether the input image data is a still image or a moving image when the play speed setting is equal to or greater than 1.0 times, a flicker value memory storing a flicker value related to a gray value of the input image data, and a driving frequency d