DISPLAY PANEL FOR DISPLAY DEVICE

• US 20150317019A1
• Filed: 07/16/2014
• Published: 11/05/2015
• Est. Priority Date: 04/30/2014
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: LEE, KiJeong, SEO, ChangHwan
• Granted Patent: US 9,213,433 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 1/16 Constructional details or arrangements
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

The present disclosure provides a display panel for a display device including a touch electrode divided into first touch unit sensors having a first size and second touch unit sensors having a second size different from the first size. When a horizontal or vertical size of a second touch unit sensor is compared with a first touch unit sensor, the vertical size of the second touch unit sensor is smaller than that of the first touch unit sensor when the horizontal size of the second touch unit sensor is larger than that of the first touch unit sensor and the horizontal size of the second touch unit sensor is smaller than that of the first touch unit sensor when the vertical size of the second touch unit sensor is larger than that of the first touch unit sensor. Therefore, an area deviation of touch unit sensors forming a touch electrode is minimized and thus uniform and superior touch performance may be provided.

Claims

1. A display panel of a display device, the display panel comprising:

a touch electrode including a plurality of first touch unit sensors and a plurality of second touch unit sensors formed around the first touch unit sensors, the plurality of first touch unit sensors having a first length and a first width, and the plurality of second touch unit sensors having a second length that is distinct from the first length of the plurality of first touch unit sensors and a second width that is distinct from the first width of the plurality of first touch unit sensors;

wherein the second length of the plurality of second touch unit sensors is smaller than the first length of the plurality of first touch unit sensors if the second width of the plurality of second touch unit sensors is larger than the first width of the plurality of first touch unit sensors; and

wherein the second length of the plurality of second touch unit sensors is larger than first length of the plurality of first touch unit sensors if the second width of the plurality of second touch unit sensors is smaller than the first width of the plurality of first touch unit sensors.

2. The display panel of claim 1, wherein the plurality of first touch unit sensors are formed in a central area of the display panel, and the plurality of second touch unit sensors are formed at corners of the active area of the display panel.

3. The display panel of claim 2, wherein the corners of the active area include a first corner to the upper left of the central area in which the plurality of first touch unit sensors are formed, a second corner to the lower left of the central area in which the plurality of first touch unit sensors are formed, a third corner to the upper right of the central area in which the plurality of first touch unit sensors are formed, and a fourth corner to the lower right of the central area in which the plurality of first touch unit sensors are formed.

4. The display panel of claim 1, wherein the second width of the plurality of second touch unit sensors is larger or smaller than the first width of the plurality of first touch unit sensors by one pixel and the second length of the plurality of second touch unit sensors is larger or smaller than the first length of the plurality of first touch unit sensors by one pixel.

5. The display panel of claim 1, wherein a number of horizontal channels where the plurality of second touch unit sensors are formed is determined based on a difference between a horizontal resolution of the display device and a product of the number of horizontal channels and the first width of the plurality of first touch unit sensors.

6. The display panel of claim 1, wherein a first portion of horizontal channels include a first plurality of second touch unit sensors is formed to the left of a central area including the plurality of first touch unit sensors and a second portion of horizontal channels include a second plurality of second touch unit sensors formed to the right of the central area, and wherein an amount of channels in the first portion and the second portion of the horizontal channels is the same.

7. The display panel of claim 6, wherein a first portion of the vertical channels include a first plurality of second touch unit sensors formed above the central area including the first touch unit sensors and a second portion of the horizontal channels include a second plurality of second touch unit sensors formed below the central area, and wherein an amount of channels in the first portion and the second portion of the vertical channels is the same.

8. The display panel of claim 1, wherein a first portion of horizontal channels include a first plurality of second touch unit sensors formed to the left of a central area include the plurality of first touch unit sensors and a second portion of horizontal channels include a second plurality of second touch unit sensors formed to the right of the central area, and wherein an amount of channels in the first portion and the second portion of the horizontal channels is different.

9. The display panel of claim 8, wherein a first portion of vertical channels include a first plurality of second touch unit sensors formed above the central area including the first touch unit sensors and a second portion of the horizontal channels include a second plurality of second touch unit sensors formed below the central area, and wherein an amount of channels in the first portion and the second portion of the vertical channels is different.

10. The display panel of claim 1, wherein the first width of the plurality of first touch unit sensors is equivalent to or greater by one pixel than a first quotient of a number of pixels formed in the horizontal direction of the display panel and a total number of first touch unit sensors and second touch unit sensors formed in the horizontal direction, and wherein the first length of the plurality of first touch unit sensors is equivalent to or greater by one pixel than a second quotient of a number of pixels formed in the vertical direction and a total number of first touch unit sensors and second touch unit sensors formed in the vertical direction.

11. The display panel of claim 1, wherein the first width of the plurality of first touch unit sensors is smaller than the second width of the plurality of second touch unit sensors by one pixel and the first length of the plurality of first touch unit sensors is larger than the second length of the plurality of second touch unit sensors by one pixel.

12. The display panel of claim 1, wherein the first width of the plurality of first touch unit sensors is larger than the second width of the plurality of second touch unit sensors by one pixel and the first length of the plurality of first touch unit sensors is smaller than the second length of the plurality of second touch unit sensors by one pixel.

13. The display panel of claim 1, wherein the first width of the plurality of first touch unit sensors is smaller than second width of the plurality of second touch unit sensors by two pixels and the first length of the plurality of first touch unit sensors is larger than the second length of the plurality of second touch unit sensors by two pixels.

14. The display panel of claim 1, further comprising:

a plurality of third touch unit sensors having a third width that is the same as the first width of the plurality of first touch unit sensors and a third length that is the same as the second length of the plurality of second touch unit sensors; and

a plurality of fourth touch unit sensors having a fourth width that is the same as the second width of the plurality of second touch unit sensors and a fourth length that is the same as the first length of the plurality of first touch unit sensors.

15. The display panel of claim 14, wherein a first portion of the plurality of third touch unit sensors is formed above the plurality of first touch unit sensors and between a first portion of the plurality of second touch unit sensors, and wherein a second portion of the plurality of third touch unit sensors is formed below the plurality of first touch unit sensors and between a second portion of the plurality of second touch unit sensors, and wherein a first portion of the plurality of third touch unit sensors is formed to the left of the plurality of first touch unit sensors and between a third portion of the plurality of second touch unit sensors and wherein a second portion of the plurality of third touch unit sensors is formed to the right of the plurality of first touch unit sensors and between a fourth portion of the plurality of second touch unit sensors

16. A display panel for a display device comprising an active area, the active area including a number of pixels formed in a horizontal direction and a number of pixels formed in a vertical direction, the display panel comprising:

a touch electrode formed with a number of touch unit sensors in the active area, the touch unit sensors including a number of horizontal channels of the touch unit sensors in the horizontal direction and a number of vertical channels of the touch unit sensors in the vertical direction,

wherein the touch unit sensor comprises a number of basic touch unit sensors formed in an area of the active area of the display panel, and variable touch unit sensors formed in the active area around the basic touch unit sensors,

wherein the basic touch unit sensors have a size of a basic horizontal unit pixel number and a basic vertical unit pixel number, and the variable touch unit sensors have a size of a variable horizontal unit pixel number and a variable vertical unit pixel number, and

wherein the variable vertical unit pixel number is smaller than the basic vertical unit pixel number if the variable horizontal unit pixel number is larger than the basic horizontal unit pixel number, and

wherein the variable vertical unit pixel number is larger than the basic vertical unit pixel number if the variable horizontal unit pixel number is smaller than the basic horizontal unit pixel number.

17. The display panel of claim 16, wherein the basic touch unit sensors are formed in a central area of the active area of the display panel, and the variable touch unit sensors are formed at corners of the active area of the display panel, wherein the corners of the active area include a first corner to the upper left of the central area in which the basic touch unit sensors is formed, a second corner to the lower left of the central area in which the basic touch unit sensors is formed, a third corner to the upper right of the central area in which the basic touch unit sensors is formed, and a fourth to the lower right of the central area in which the basic touch unit sensors is formed.

18. The display panel of claim 16, wherein the basic horizontal unit pixel number is smaller than the variable horizontal unit pixel number by one pixel and the basic vertical unit pixel number is larger than the variable vertical unit pixel number by one pixel.

19. The display panel of claim 16, wherein the basic horizontal unit pixel number is larger than the variable horizontal unit pixel number by one pixel and the basic vertical unit pixel number is smaller than the variable vertical unit pixel number by one pixel.

20. The display panel of claim 16, wherein the basic horizontal unit pixel number is smaller than the variable horizontal unit pixel number by two pixels and the basic vertical unit pixel number is larger than the variable vertical unit pixel number by two pixels.