KR-20260065033-A - DISPLAY DEVICE AND ELECTRONIC INCLUDING THE SAME

Abstract

The display device includes a display panel comprising a first block and a second block, and a display panel driver that generates a first power supply voltage based on the maximum grayscale of input image data for the first block and generates a second power supply voltage based on the maximum grayscale of input image data for the second block, and outputs the first power supply voltage and the second power supply voltage to the display panel. The display panel driver alternately outputs the first power supply voltage to the upper and lower parts of the first block and alternately outputs the second power supply voltage to the upper and lower parts of the second block.

Inventors

• 장형욱
• 장상희

Assignees

• 삼성디스플레이 주식회사

Dates

Publication Date

20260508

Application Date

20241031

Claims (20)

1. A display panel including a first block and a second block; and A display panel driving unit that generates a first power supply voltage based on the maximum grayscale of input image data for the first block and generates a second power supply voltage based on the maximum grayscale of input image data for the second block, and outputs the first power supply voltage and the second power supply voltage to the display panel. A display device characterized in that the above-described display panel driving unit alternately outputs the first power supply voltage to the upper and lower parts of the first block and alternately outputs the second power supply voltage to the upper and lower parts of the second block.
2. A display device according to claim 1, characterized in that the first block is located on the second block.
3. In Article 1, The first block includes horizontal power lines extending in a horizontal direction to which the first power supply voltage is applied, and vertical power lines extending in a vertical direction to which the first power supply voltage is applied. A display device characterized in that the second block comprises horizontal power lines extending in the horizontal direction to which the second power supply voltage is applied, and vertical power lines extending in the vertical direction to which the first power supply voltage is applied.
4. In Article 1, The greater the maximum grayscale of the input image data for the first block, the greater the first power supply voltage, and A display device characterized in that the greater the maximum grayscale of the input image data for the second block, the greater the second power supply voltage.
5. In Article 1, The voltage of the upper portion of the first block and the voltage of the lower portion of the first block are the first power supply voltages, and A display device characterized in that the voltage of the upper portion of the second block and the voltage of the lower portion of the second block are the first power supply voltage.
6. In Article 1, A display device characterized in that the voltage drop of the first block increases when the position of the first block moves away from the upper part or the lower part of the first block.
7. In Article 6, A display device characterized in that the voltage drop of the second block increases when the position of the second block moves away from the upper part or the lower part of the second block.
8. In Article 7, A display device characterized in that when the position of the first block moves away from the upper part of the first block and then approaches the lower part of the first block, the voltage of the first block decreases and then increases.
9. In Article 8, A display device characterized in that when the position of the second block moves away from the upper part of the second block and then approaches the lower part of the second block, the voltage of the first block decreases and then increases.
10. A display device according to claim 9, characterized in that when the first power supply voltage is the same as the second power supply voltage, the voltage at the lower part of the first block is the same as the voltage at the upper part of the second block.
11. A display device according to claim 1, wherein when the first power supply voltage is different from the second power supply voltage, the display panel driving unit performs gamma correction on the input image data for the first block and the input image data for the second block.
12. A display device according to claim 11, characterized in that when the gamma correction is performed, the luminance of the first block and the luminance of the second block for the same grayscale are the same.
13. A display panel including a first block and a second block; A display panel driving unit that generates a first power supply voltage based on the maximum grayscale of input image data for the first block and generates a second power supply voltage based on the maximum grayscale of input image data for the second block, and outputs the first power supply voltage and the second power supply voltage to the display panel; and It includes a power supply that supplies power to the above-mentioned display panel and the above-mentioned display panel driving unit, and An electronic device characterized in that the above-described display panel driving unit alternately outputs the first power supply voltage to the upper and lower parts of the first block and alternately outputs the second power supply voltage to the upper and lower parts of the second block.
14. An electronic device according to claim 13, wherein the first block is located on the second block.
15. In Article 13, The first block includes horizontal power lines extending in a horizontal direction to which the first power supply voltage is applied, and vertical power lines extending in a vertical direction to which the first power supply voltage is applied. An electronic device characterized in that the second block comprises horizontal power lines extending in the horizontal direction to which the second power supply voltage is applied, and vertical power lines extending in the vertical direction to which the first power supply voltage is applied.
16. In Article 13, The greater the maximum grayscale of the input image data for the first block, the greater the first power supply voltage, and An electronic device characterized in that the greater the maximum grayscale of the input image data for the second block, the greater the second power supply voltage.
17. In Article 13, The voltage of the upper portion of the first block and the voltage of the lower portion of the first block are the first power supply voltages, and An electronic device characterized in that the voltage of the upper portion of the second block and the voltage of the lower portion of the second block are the first power supply voltage.
18. In Article 13, An electronic device characterized in that the voltage drop of the first block increases when the position of the first block moves away from the upper part or the lower part of the first block.
19. In Article 18, An electronic device characterized in that the voltage drop of the second block increases when the position of the second block moves away from the upper part or the lower part of the second block.
20. In Article 19, An electronic device characterized in that when the position of the first block moves away from the upper part of the first block and then approaches the lower part of the first block, the voltage of the first block decreases and then increases.

Description

Display device and electronic device including the same The present invention relates to a display device and an electronic device including the same, and more specifically, to a display device and an electronic device including the same that reduces power consumption and improves display quality by precisely setting the power supply voltage. Generally, a display device includes a display panel and a display panel driver. The display panel includes gate lines, data lines, and pixels. The display panel driver includes a gate driver that provides a gate signal to the gate lines, a data driver that provides a data voltage to the data lines, a power voltage generator that generates a power voltage and outputs it to the display panel, and a driving control unit that controls the gate driver, the data driver, and the power voltage generator. To reduce the power consumption of the display device, the display panel may be divided into blocks. The driving control unit may determine the levels of power voltages applied to each of the blocks, and the power voltage generation unit may output the power voltages to the blocks through power voltage wiring. However, a voltage drop (IR drop) may occur with respect to the power voltages transmitted through the power voltage wiring. Therefore, a boundary line due to a difference in brightness at the boundary between the blocks may be visible to the user. FIG. 1 is a block diagram showing a display device according to embodiments of the present invention. Figure 2 is a circuit diagram showing an example of a pixel of Figure 1. Figure 3 is a diagram showing the power wiring structure of the display panel of Figure 1. Figure 4 is a block diagram showing the blocks of the display panel of Figure 1 and the power voltage generation unit. Figure 5 is a block diagram showing the drive control unit and power supply voltage generation unit of Figure 1. Figure 6 is a diagram showing the conventional connection structure of the display panel and power voltage generation unit of Figure 1. Figure 7 is a conceptual diagram showing the first block in the connection structure of Figure 6. Figure 8 is a graph showing the voltage according to position in the first block of Figure 7. Figure 9 is a graph showing the voltage according to position in the first, second, third, and fourth blocks of Figure 6. FIG. 10 is a diagram showing the connection structure of the present invention between the display panel and the power voltage generating unit of FIG. 1. Figure 11 is a conceptual diagram showing the first block in the connection structure of Figure 10. Figure 12 is a graph showing the voltage according to position in the first block of Figure 11. FIG. 13 is a graph showing voltage according to position in the first block, second block, third block, and fourth block (BL4) of FIG. 10. FIG. 14 is a block diagram showing an electronic device according to embodiments of the present invention. FIG. 15 is a diagram showing an example in which the electronic device of FIG. 14 is implemented as a smartphone. 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 (10) according to embodiments of the present invention. Referring to FIG. 1, the display device (10) includes a display panel (100) and a display panel driver. The display panel driver may include a drive control unit (200), a gate driver (300), a gamma reference voltage generator (400), and a data driver (500). The display panel driver may further include a power supply voltage generator (600). For example, the drive control unit (200) and the data drive unit (500) may be formed integrally. For example, the drive control unit (200), the gamma reference voltage generation unit (400), and the data drive unit (500) may be formed integrally. For example, the drive control unit (200), the gamma reference voltage generation unit (400), the data drive unit (500), and the power supply voltage generation unit (600) may be formed integrally. At least a drive module in which the drive control unit (200) and the data drive unit (500) are formed integrally may be named a Timing Controller Embedded Data Driver (TED). The above display panel (100) may include a display portion for displaying an image and a peripheral portion disposed adjacent to the display portion. For example, in the present embodiment, the display panel (100) may be an organic light-emitting diode display panel including an organic light-emitting diode. For example, the display panel (100) may be a quantum-dot organic light-emitting diode display panel including an organic light-emitting diode and a quantum-dot color filter. For example, the display panel (100) may be a quantum-dot nano light-emitting diode display panel including a nano light-emitting diode and a quantum-dot color filter. The display panel (100) may include a plurality of gate lines (GL), a plurality of data lines (DL),