KR-102962379-B1 - DISPLAY DEVICE

Abstract

The present invention relates to a display device capable of minimizing load differences applied to scan lines. A display device according to one embodiment includes a first display area, a second display area protruding in one direction from one side edge of the first display area, and a third display area protruding in one direction from one side edge of the first display area with a notch portion between them and the second display area; a touch detection unit formed on the front surface of the first to third display areas to detect user touch; a scan driving circuit that sequentially supplies scan signals to the scan lines of the first to third display areas; and a touch driving circuit that supplies touch driving signals to the touch electrodes of the touch detection unit.

Inventors

• 서명희

Assignees

• 삼성디스플레이 주식회사

Dates

Publication Date

20260508

Application Date

20211202

Claims (20)

1. A display panel comprising a first display area, a second display area protruding in one direction from one side edge of the first display area, and a third display area protruding in one direction from one side edge of the first display area with a notch portion between them and the second display area; A touch detection unit formed on the front surface of the first to third display areas to detect user touch; A scan driving circuit that sequentially supplies scan signals to the scan lines of the first to third display areas; and It includes a touch driving circuit that supplies a touch driving signal to the touch electrodes of the touch sensing unit, and The above touch driving circuit is During the image display period of at least one of the first to third display areas, the pulse width or output timing of the touch driving signal is varied and supplied to the touch electrodes, and The above touch driving circuit is A display device that generates a touch driving signal in a pulse type and supplies it to touch electrodes so as to be synchronized with the supply periods of at least one scan signal among the first to third scan signals during the period in which the first to third scan signals are each supplied to the first to third scan lines of the second and third display areas among the first to third display areas.
2. In Article 1, The area of the second and third display areas is smaller than the area of the first display area, and The above scan driving circuit is a display device that sequentially supplies scan signals to the scan lines of the second and third display areas, and then sequentially supplies scan signals to the scan lines of the first display area.
3. In Article 1, A display device in which the pulse width of the above touch driving signal is generated with a width smaller than one horizontal period according to the horizontal synchronization signal.
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5. In Paragraph 3, The above touch driving circuit is A display device that generates a touch driving signal and supplies it to the touch electrodes such that the rising timing of the touch driving signal is synchronized with the supply periods of at least one of the first to third scan signals.
6. In Paragraph 3, The above touch driving circuit is During the period in which the first to third scan signals are supplied to the first to third scan lines of the second and third display areas, respectively, A display device that generates the touch driving signal in a pulse type and supplies it to the touch electrodes so as to be synchronized with the supply periods of the second scan signal among the first to third scan signals.
7. In Article 6, The above touch driving circuit is A display device that generates a touch driving signal and supplies it to the touch electrodes such that the rising timing of the touch driving signal is synchronized with the supply period of the second scan signals among the first to third scan signals.
8. In Article 1, The above scan driving circuit is A display device that generates pulse widths of first to third scan signals applied to subpixels of the second and third display regions, respectively, with a narrower width than the pulse widths of first to third scan signals applied to subpixels of the first display region, and supplies them to the first to third scan lines of the second and third display regions, respectively.
9. In Article 8, The above touch driving circuit is Compared to the pulse width of the touch driving signal generated during the period when an image is displayed in the first display area, the pulse width of the touch driving signal generated during the period when an image is displayed in the second and third display areas is generated with a wider width, and A display device that supplies the first to third scan signals to the touch electrodes such that, during the period in which the first to third scan signals are each supplied to the first to third scan lines of the second and third display areas, the rising timing of the touch driving signal is synchronized with the supply period of any one of the first to third scan signals.
10. In Article 8, The above touch driving circuit is Compared to the pulse width of the touch driving signal generated during the period when an image is displayed in the first display area, the pulse width of the touch driving signal generated during the period when an image is displayed in the second and third display areas is generated with a narrower width, and A display device that supplies the first to third scan signals to the touch electrodes such that, during the period in which the first to third scan signals are each supplied to the first to third scan lines of the second and third display areas, the rising timing of the touch driving signal is synchronized with the supply period of any one of the first to third scan signals.
11. In Article 8, The above touch driving circuit is The touch driving signal is delayed by a preset delay period during the period in which the first to third scan pulses are sequentially supplied to the first to third scan pulses of the second and third display areas, and A display device that supplies the first to third scan signals to the touch electrodes such that, during the period in which the first to third scan signals are each supplied to the first to third scan lines of the second and third display areas, the rising timing of the touch driving signal is synchronized with the supply period of any one of the first to third scan signals.
12. In Article 8, The above touch driving circuit is A display device that generates a pulse width of the touch driving signal generated during the period when an image is displayed in the first display area with a width that is wider or narrower than the pulse width of the touch driving signal generated during the period when an image is displayed in the second and third display areas, and outputs the touch driving signal such that the rising timing of the touch driving signal during the period when an image is displayed in the first display area is synchronized with the supply period of the scan signals.
13. A display panel comprising a first display area, a second display area protruding in one direction from one side edge of the first display area, and a third display area protruding in one direction from one side edge of the first display area with a notch portion between them and the second display area; A touch detection unit formed on the front surface of the first to third display areas to detect user touch; A scan driving circuit that varies the pulse width of scan signals during the image display period of at least one of the first to third display areas and supplies them to the scan lines of the first to third display areas; and A touch driving circuit that varies the pulse width or output timing of a touch driving signal during the image display period of at least one of the first to third display areas and supplies it to the touch electrodes of the touch detection unit, and The above touch driving circuit is A display device that generates a touch driving signal in a pulse type and supplies it to touch electrodes so as to be synchronized with the supply periods of at least one scan signal among the first to third scan signals during the period in which the first to third scan signals are each supplied to the first to third scan lines of the second and third display areas among the first to third display areas.
14. In Article 13, The above scan driving circuit is A display device that generates pulse widths of first to third scan signals applied to subpixels of the second and third display regions, respectively, with a narrower width than the pulse widths of first to third scan signals applied to subpixels of the first display region, and supplies them to the first to third scan lines of the second and third display regions, respectively.
15. In Article 14, The above touch driving circuit is A display device that generates and supplies a touch driving signal to the touch electrodes such that, during the period in which first to third scan signals are each supplied to first to third scan lines of the second and third display areas, the polling timing of the touch driving signal is synchronized with the supply periods of at least one of the first to third scan signals.
16. In Article 14, The above touch driving circuit is During the period in which the first to third scan signals are supplied to the first to third scan lines of the second and third display areas, respectively, A display device that generates a touch driving signal and supplies it to the touch electrodes such that the polling timing of the touch driving signal is synchronized with the supply period of the second scan signals among the first to third scan signals.
17. In Article 14, The above touch driving circuit is Compared to the pulse width of the touch driving signal generated during the period when an image is displayed in the first display area, the pulse width of the touch driving signal generated during the period when an image is displayed in the second and third display areas is generated with a wider width, and During the period in which the first to third scan signals are supplied to the first to third scan lines of the second and third display areas, respectively, A display device that supplies the touch driving signal to the touch electrodes such that the polling timing of the touch driving signal is synchronized with the supply period of any one of the first to third scan signals.
18. In Article 14, The above touch driving circuit is Compared to the pulse width of the touch driving signal generated during the period when an image is displayed in the first display area, the pulse width of the touch driving signal generated during the period when an image is displayed in the second and third display areas is generated with a narrower width, and During the period in which the first to third scan signals are supplied to the first to third scan lines of the second and third display areas, respectively, A display device that supplies the touch driving signal to the touch electrodes such that the polling timing of the touch driving signal is synchronized with the supply period of any one of the first to third scan signals.
19. In Article 14, The above touch driving circuit is The touch driving signal is generated by delaying the first to third scan pulses of the second and third display areas by a preset delay period during the period in which the first to third scan pulses are sequentially supplied to the first to third scan pulses of the second and third display areas, and During the period in which the first to third scan signals are supplied to the first to third scan lines of the second and third display areas, respectively, A display device that supplies the touch driving signal to the touch electrodes such that the polling timing of the touch driving signal is synchronized with the supply period of any one of the first to third scan signals.
20. In Article 14, The above touch driving circuit is A display device that generates a pulse width of the touch driving signal generated during the period when an image is displayed in the first display area with a width that is wider or narrower than the pulse width of the touch driving signal generated during the period when an image is displayed in the second and third display areas, and outputs the touch driving signal such that the polling timing of the touch driving signal is synchronized with the supply period of the scan signals during the period when an image is displayed in the first display area.

Description

Display Device The present invention relates to a display device. As the information society develops, the demand for display devices to display images is increasing in various forms. For example, display devices are being applied to a wide range of electronic devices, such as smartphones, digital cameras, laptop computers, navigation systems, and smart televisions. Display devices may be flat panel displays, such as Liquid Crystal Display Devices, Field Emission Display Devices, and Light Emitting Display Devices. The display device may include a display panel having a display area for displaying images and a non-display area for not displaying images, and various sensor devices for detecting light, such as a camera sensor, an illuminance sensor, and an infrared sensor. In the display area of the display panel, scan lines to which scan signals are applied, data lines to which data voltages are applied, and pixels connected to the scan lines and data lines may be formed. The display area of the display panel can be formed so as not to overlap with sensor devices, and as a result, one side of the display area of the display panel may be formed in the shape of a notch in which a portion of the area is concave when viewed on a flat surface. In this case, the number of pixels connected to the scan lines around the notch area differs from the number of scan lines around the entire display area, so the load applied to the scan lines around the notch area may differ. Consequently, differences in the pulse width of the scan signal occur for each scan line, and differences in brightness may occur between pixels. In particular, if other signals, such as touch driving signals, are applied during the floating period of the data lines of each pixel, the difference in brightness around the notch area may become even greater due to coupling phenomena. FIG. 1 is a perspective view showing a display device according to one embodiment. FIG. 2 is a plan view showing a display device according to one embodiment. FIG. 3 is a side view showing a display device according to one embodiment. Figure 4 is a layout diagram schematically showing an example of the touch sensing part of Figure 3. FIG. 5 is a layout diagram showing, as an example, a driving circuit arrangement structure placed in the first to third display areas and non-display areas of the display panel shown in FIG. 2. Figure 6 is a circuit diagram showing an example of one subpixel illustrated in Figure 5. FIG. 7 is a cross-sectional view showing an example of a sixth transistor and a light-emitting element of a subpixel shown in FIG. 6. FIG. 8 is a waveform diagram showing a horizontal synchronization signal, a touch driving signal, scan signals, and light emission signals according to one embodiment. FIG. 9 is a waveform diagram showing a horizontal synchronization signal, a touch driving signal, scan signals, and light emission signals according to another embodiment. FIG. 10 is a waveform diagram showing a horizontal synchronization signal, a touch driving signal, scan signals, and light emission signals according to another embodiment. Figure 11 is a circuit diagram showing another example of one of the subpixels shown in Figure 5. FIG. 12 is another waveform diagram showing a horizontal synchronization signal, a touch driving signal, scan signals, and light emission signals according to one embodiment. FIG. 13 is another waveform diagram showing a horizontal synchronization signal, a touch driving signal, scan signals, and light emission signals according to one embodiment. FIG. 14 is another waveform diagram showing a horizontal synchronization signal, a touch driving signal, scan signals, and light emission signals according to another embodiment. FIGS. 15 and FIGS. 16 are perspective views showing a display device according to another embodiment of the present invention. FIGS. 17 and FIGS. 18 are perspective views showing a display device according to another embodiment of the present invention. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. When elements or layers are referred to as being "on" another element or layer, this includes cases where another layer or element is interposed directly on or in the middle of another element. Throughout the specification, the same reference numerals refer to the same components. Shapes, sizes, ratios, angles, numbers, etc., disclosed in the drawings for describing embodiments are exemplary