KR-20260065665-A - DISPLAY DEVICE, METHOD OF OPERATING THE DISPLAY DEVICE AND ELECTRONIC DEVICE INCLUDING THE DISPLAY DEVICE

Abstract

The display device includes a display panel comprising a plurality of pixels, a gate driver that outputs a gate signal to the plurality of pixels through a gate line extending in a first direction, a data driver that outputs a data voltage to the plurality of pixels through a data line extending in a second direction, and a driving control unit that controls the gate driver and the data driver. The driving control unit compares output image data corresponding to each of the plurality of sub-display areas parallel to the second direction included in the display panel, detects an identical data area among the plurality of sub-display areas where the output image data of the previous frame and the output image data of the current frame are identical, and performs low-power mode driving in which the output image data corresponding to the identical data area in the current frame is not transmitted.

Inventors

• 임현호
• 김유성

Assignees

• 삼성디스플레이 주식회사

Dates

Publication Date

20260511

Application Date

20241101

Claims (20)

1. A display panel including multiple pixels; A gate driving unit that outputs a gate signal to the plurality of pixels through a gate line extending in a first direction; A data driving unit that outputs a data voltage to the plurality of pixels through a data line extending in a second direction; and It includes a drive control unit that controls the gate drive unit and the data drive unit, and The above driving control unit compares output image data corresponding to each of the plurality of sub-display areas parallel to the second direction included in the display panel, and detects an identical data area among the plurality of sub-display areas where the output image data of the previous frame and the output image data of the current frame are identical. A display device characterized by performing low-power mode operation that does not transmit output image data corresponding to the same data area in the current frame.
2. A display device according to claim 1, characterized in that when the low-power mode driving is performed for the same data area in the current frame, at least one component of the data driving unit is turned off.
3. In claim 2, the data driving unit includes a plurality of receiving blocks corresponding to each of the plurality of sub-display areas, and Each of the plurality of receiving blocks receives the output image data corresponding to each of the plurality of sub-display areas, and A display device characterized in that, among the plurality of receiving blocks in the current frame, the receiving block corresponding to the same data area is turned off.
4. A display device according to claim 1, characterized in that when the low-power mode driving is performed for the same data area in the current frame, at least one component of the driving control unit is turned off.
5. In claim 4, the driving control unit includes a plurality of transmission blocks corresponding to each of the plurality of sub-display areas, and Each of the above plurality of transmission blocks transmits the output image data corresponding to each of the above plurality of sub-display areas, and A display device characterized in that, among the plurality of transmission blocks in the current frame, the transmission block corresponding to the same data area is turned off.
6. A display device according to claim 1, characterized in that when the low-power mode driving is performed for the same data area in the current frame, at least one component of the data driving unit and at least some components of the driving control unit are turned off.
7. In claim 6, the data driving unit includes a plurality of receiving blocks corresponding to each of the plurality of sub-display areas, and Each of the plurality of receiving blocks receives the output image data corresponding to each of the plurality of sub-display areas, and The above-mentioned drive control unit includes a plurality of transmission blocks corresponding to each of the plurality of sub-display areas, and Each of the above plurality of transmission blocks transmits the output image data corresponding to each of the above plurality of sub-display areas, and In the current frame above, the receiving block corresponding to the same data area among the plurality of receiving blocks is turned off, and A display device characterized in that among the plurality of transmission blocks, the transmission block corresponding to the same data area is turned off.
8. In claim 1, in the blank section of the previous frame, the driving control unit transmits protocol data corresponding to each of the plurality of sub-display areas to the data driving unit through data transmission lines for transmitting the output image data corresponding to each of the plurality of sub-display areas, and A display device characterized in that each of the protocol data transmitted in the blank section of the previous frame includes a low-power mode entry signal and a low-power mode exit signal for determining whether to perform low-power mode operation for each of the plurality of sub-display areas in the current frame.
9. A display device according to claim 8, characterized in that it performs low-power mode driving for a first target sub-display area corresponding to a low-power mode entry signal having an activation level among the plurality of sub-display areas in the current frame.
10. A display device according to claim 8, characterized in that the low-power mode operation is terminated for a second target sub-display area corresponding to the low-power mode termination signal having an activation level among the plurality of sub-display areas in the current frame.
11. A display device according to claim 1, wherein the driving control unit transmits low-power signals for determining whether to perform low-power mode driving for each of the plurality of sub-display areas to the data driving unit through signal transmission lines distinguished from data transmission lines for transmitting output image data.
12. In claim 11, in response to a first low-power signal having an activation level among the low-power signals, low-power mode driving is performed for a first target sub-display area corresponding to the first low-power signal among the plurality of sub-display areas, and A display device characterized by performing a general mode drive in which, in response to a second low-power signal having an inactivation level among the above low-power signals, a data driver receives the output image data for a second target sub-display area corresponding to the second low-power signal among the plurality of sub-display areas.
13. A step of comparing output image data corresponding to each of a plurality of sub-display areas parallel to the second direction included in the display panel; A step of detecting an identical data region among the plurality of sub-display regions, wherein the output image data of the previous frame and the output image data of the current frame are identical; and It includes a step of determining whether to perform low-power mode driving for each of the plurality of sub-display areas above, and Performing the low-power mode operation for the same data area mentioned above, A driving method for a display device characterized by not transmitting the output image data corresponding to the same data area when driving in the low-power mode for the same data area.
14. A driving method for a display device according to claim 13, characterized in that when the low-power mode driving is performed for the same data area in the current frame, at least one component of the data driving unit is turned off.
15. In claim 14, the data driving unit includes a plurality of receiving blocks corresponding to each of the plurality of sub-display areas, and Each of the plurality of receiving blocks receives the output image data corresponding to each of the plurality of sub-display areas, and A driving method for a display device characterized by turning off a receiving block corresponding to the same data area among the plurality of receiving blocks in the current frame.
16. A driving method for a display device according to claim 13, characterized in that when the low-power mode driving is performed for the same data area in the current frame, at least one component of the driving control unit is turned off.
17. In claim 16, the driving control unit includes a plurality of transmission blocks corresponding to each of the plurality of sub-display areas, and Each of the above plurality of transmission blocks transmits the output image data corresponding to each of the above plurality of sub-display areas, and A method for driving a display device characterized by turning off a transmission block corresponding to the same data area among the plurality of transmission blocks in the current frame.
18. In claim 13, in the blank section of the previous frame, the driving control unit transmits protocol data corresponding to each of the plurality of sub-display areas to the data driving unit through data transmission lines for transmitting the output image data corresponding to each of the plurality of sub-display areas, and A method for driving a display device, characterized in that each of the protocol data transmitted in the blank section of the previous frame includes a low-power mode entry signal and a low-power mode exit signal for determining whether to perform low-power mode driving for each of the plurality of sub-display areas in the current frame.
19. In claim 18, the low-power mode driving is performed for a first target sub-display area corresponding to the low-power mode entry signal having an activation level among the plurality of sub-display areas in the current frame, and A driving method for a display device characterized by terminating low-power mode driving for a second target sub-display area corresponding to a low-power mode termination signal having an activation level among the plurality of sub-display areas in the current frame.
20. In claim 12, the driving control unit transmits low-power signals for determining whether to perform low-power mode driving for each of the plurality of display areas to the data driving unit through signal transmission lines that are distinct from data transmission lines for transmitting the output image data, and In response to a first low-power signal having an activation level among the above low-power signals, low-power mode driving is performed for a first target sub-display area corresponding to the first low-power signal among the plurality of sub-display areas, and A driving method for a display device characterized by performing a general mode driving in which, in response to a second low-power signal having an inactivation level among the low-power signals, a data driving unit receives the output image data for a second sub-display area corresponding to the second low-power signal among the plurality of sub-display areas.

Description

Display device, method of operating the display device, and electronic device including the display device The present invention relates to a display device and an electronic device. More specifically, the present invention relates to a display device including a data driving unit, a method for driving a display device, and an electronic device including a display device. Generally, a display device may include a display panel and a display panel driver. The display panel may include gate lines, data lines, and pixels connected thereto. The display panel driver may include a gate driver that provides a gate signal to the gate lines, a data driver that provides a data voltage to the data lines, and a driving control unit that controls the gate driver and the data driver. Recently, a display device that performs Low Power Mode operation when the data signal of the previous frame and the data signal of the current frame are identical has been proposed. However, conventional display devices have a limitation in that they can only perform Low Power Mode operation for the entire display area, and thus cannot perform Low Power Mode operation except when displaying identical still images between frames. FIG. 1 is a block diagram showing a display device according to embodiments of the present invention. FIG. 2 is a drawing showing that a display panel included in the display device of FIG. 1 is divided into a plurality of display areas. FIG. 3 is a diagram showing an example of a transmitting group of a driving control unit and a receiving group of a data driving unit included in the display device of FIG. 1. Figure 4 is a diagram showing an example of a transmission block of a transmission block group included in the transmission group of Figure 3 and a reception block of a reception block group included in the reception group. FIG. 5 is a block diagram showing an example of a data driving unit included in the display device of FIG. 1. FIG. 6 is a diagram for explaining how to determine the same data area of a display panel included in the display device of FIG. 1. FIG. 7 is a timing diagram showing an example of an operation on the same data area of a display panel performed by a data driving unit included in the display device of FIG. 1. Figure 8 is a flowchart showing the driving method of the display device of Figure 1. Figure 9 is a diagram showing another example of the transmitting block of the transmitting block group and the receiving block of the receiving block group in Figure 3. FIG. 10 is a block diagram showing a display device according to embodiments of the present invention. FIG. 11 is a timing diagram showing an example of an operation on the same data area of a display panel performed by a data driving unit included in the display device of FIG. 10. FIG. 12 is a drawing for explaining how to determine the same data area of a display panel included in the display device of FIG. 1. FIG. 13 is a block diagram showing an electronic device according to embodiments of the present invention. Hereinafter, the present invention will be described in more detail with reference to the attached drawings. FIG. 1 is a block diagram showing a display device (1) according to embodiments of the present invention. FIG. 2 is a diagram showing that a display panel (100) included in the display device (1) of FIG. 1 is divided into a plurality of display areas (DP). Referring to FIG. 1, a display device (1) may include a display panel (100) including pixels (PX), a gate driver (400) that provides gate signals (SS) to the pixels (PX), a data driver (300) that provides data voltages (DV) to the pixels (PX), and a driving control unit (200) that controls the gate driver (400) and the data driver (300). The display panel (100) may include gate lines that transmit gate signals (SS) and data lines that transmit data voltages (DV). The gate driver (400) can generate gate signals (SS) based on a gate control signal (SCTRL) received from the drive control unit (200) and provide the gate signals (SS) to pixels (PX) in rows through gate lines. In one embodiment, the gate lines may extend in a first direction (D1). In one embodiment, the gate control signal (SCTRL) may include a gate start signal and a gate clock signal, but is not limited thereto. In one embodiment, the gate driver (400) may be integrated or formed in a peripheral area adjacent to the display area of the display panel (100). In another embodiment, the gate driver (400) may be integrated or formed in at least a portion of the display area of the display panel (100). In yet another embodiment, the gate driver (400) may be implemented in the form of an integrated circuit. A driving control unit (200) (e.g., a timing driving control unit (Timing Controller; TCON)) may receive an input image data group (IDATG) and a control signal (CTRL) from an external host processor (e.g., an application processor (AP), a graphic processing unit (GPU), a graphics card, etc.). For