Display device having a touch screen panel and manufacturing method thereof

• US 8,884,889 B2
• Filed: 06/03/2011
• Issued: 11/11/2014
• Est. Priority Date: 10/28/2010
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Shawn, Beom, Jin-Gab
• Primary Examiner(s): Leiby, Christopher E
• Application Number:
  US13/067,479
• Publication Number:
  US 20120105340A1
• Time in Patent Office: 1,257 Days
• Field of Search: 345/173, 445/60, 156/291
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display

Abstract

A display device having a touch screen includes a touch screen panel defined by an active area in which an external input is sensed and a non-active area outside the active area. A display panel displays an image based on the sensing of the touch screen panel. A window covers the touch screen panel. A lower resin layer is formed on a rear surface of the touch screen panel to join the touch screen panel and the display panel to be joined together. An upper resin layer is formed on a front surface of the touch screen panel to join the touch screen panel and the window together. A lower dam or an upper dam is formed on the rear or front surface of the non-active area in the touch screen panel along a side circumference of the lower or upper resin layer, respectively.

Claims

1. A display device having a touch screen, comprising:

a touch screen panel defined by an active area in which an external input is sensed and a non-active area outside the active area;

a display panel that displays an image based on inputs to the touch screen panel;

a window that covers the touch screen panel;

a lower resin layer between a rear surface of the touch screen panel and the display panel, the lower resin layer joining the touch screen panel and the display panel together;

an upper resin layer between a front surface of the touch screen panel and the window, the upper resin layer joining the touch screen panel and the window together; and

a lower dam or an upper dam only in the non-active area of the touch screen panel along a side circumference of the lower or upper resin layer, respectively, and surrounding the lower resin layer or the upper resin layer, respectively,

wherein the lower dam or the upper dam directly contacts the touch screen panel, and a height of the upper dam is identical to a height of the upper resin layer or a height of the lower dam is identical to a height of the lower resin layer.

2. The display device according to claim 1, wherein the upper dam is formed on the front surface of the non-active area in the touch screen panel along the side circumference of the upper resin layer to restrict flow of the upper resin layer.

3. The display device according to claim 2, wherein the upper dam is formed of glue or silicon with a viscosity of 10000 cps or higher.

4. The display device according to claim 1, wherein the window comprises a light-shielding pattern corresponding to the non-active area, and the upper dam is disposed to correspond to the light-shielding pattern.

5. The display device according to claim 1, wherein the lower dam is formed on the rear surface of the non-active area in the touch screen panel along the side circumference of the lower resin layer so as to restrict flow of the lower resin layer.

6. The display device according to claim 5, wherein the width of the lower dam is 0.2 mm.

7. The display device according to claim 1, comprising both the upper dam and the lower dam, wherein the upper and lower dams are made of different materials from each other.

8. The display device according to claim 1, comprising both the upper dam and the lower dam, wherein the lower and upper resin layers are made of the same material.

9. The display device according to claim 1, wherein the lower dam or the upper dam completely surrounds the lower resin layer or the upper resin layer, respectively.

10. A manufacturing method of a display device having a touch screen, the method comprising:

preparing a touch screen panel defined by an active area and a non-active area formed at the outside of the active area;

forming a protection film in the active area on a rear surface of the touch screen panel and forming a lower dam only in the non-active area on the rear surface of the touch screen panel;

removing the protection film formed in the active area;

forming a lower resin layer on the rear surface of the active area when the protection film is removed; and

aligning the touch screen panel and a display panel so that the rear surface of the touch screen panel faces a front surface of the display panel, thereby joining the touch screen panel and the display panel together,

wherein the lower dam is formed directly on the rear surface of the touch screen panel and surrounds the lower resin layer, and a height of the lower dam is identical to a height of the lower resin layer or a height of the upper dam is identical to a height of the upper resin layer.

11. The method according to claim 10, wherein the lower dam is made of the same material as the protection film.

12. The method according to claim 10, wherein the width of the lower dam is 0.2 mm.

13. The method according to claim 10, wherein the lower dam and the protection film are formed through an ink screening process.

14. The method according to claim 10, further comprising:

forming an upper dam in the non-active area on a front surface of the touch screen panel;

forming an upper resin layer in the active area on the front surface of the touch screen panel; and

aligning the touch screen panel and a window so that the front surface of the touch screen panel faces the window, thereby joining the touch screen panel and the window together.

15. The method according to claim 14, wherein the upper dam is formed of glue or silicon with a viscosity of 10000 cps or higher.

16. The method according to claim 14, wherein the upper dam is disposed to a light-shielding pattern formed in a non-active area of the window.

17. The method according to claim 14, wherein an initial height of the upper dam is higher than a height of the upper resin layer.

18. The method according to claim 14, wherein a final height of the upper dam is identical to a height of the upper resin layer.

19. A manufacturing method of a display device having a touch screen, the method comprising:

preparing a touch screen panel defined by an active area and a non-active area formed at the outside of the active area;

forming an upper dam only in the non-active area on a front surface of the touch screen panel;

forming an upper resin layer in the active area on the front surface of the touch screen panel;

aligning the touch screen panel and a window so that the front surface of the touch screen panel faces the window, thereby joining the touch screen panel and the window together; and

forming a lower resin layer in the active area on the rear surface of the touch screen panel; and

aligning the touch screen panel and a display panel so that the rear surface of the touch screen panel faces a front surface of the display panel, thereby joining the touch screen panel and the display panel together,

wherein the upper dam is formed directly on the front surface of the touch screen panel and surrounds the upper resin layer, wherein a height of the upper dam is identical to a height of the upper resin layer, and a height of the lower dam is identical to a height of the lower resin layer.