Touch display panel and method of manufacturing the same

• US 8,780,063 B2
• Filed: 06/29/2011
• Issued: 07/15/2014
• Est. Priority Date: 08/13/2010
• Status: Active Grant

• Current Assignee: Hydis Technologies Co Ltd (E Ink Holdings Incorporated)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Kyu-Young, Lee, Youn-Gu, Jung, Nam-Ok, Jo, Gug-Rae, Lee, Dae-Young
• Primary Examiner(s): Chang, Kent
• Assistant Examiner(s): WOO, KUO-KONG
• Application Number:
  US13/172,167
• Publication Number:
  US 20120038567A1
• Time in Patent Office: 1,112 Days
• Field of Search: 345/173, 345/107, 345/174, 345/76, 349/160, 349/12
• 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 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A touch display panel may include a display unit and a touch unit. The display unit may include a first base substrate having a plurality of pixel electrodes, a second base substrate including a common electrode disposed on a first face of the second base substrate, and an electro optical layer disposed between the pixel electrodes and the common electrode. The first face faces the first base substrate. The touch unit includes a color filter layer including a plurality of color filters and a first electrode part including first electrodes disposed on a second face of the second base substrate, and a third base substrate including a second electrode part extended along a direction crossing the first electrodes. The first electrodes may be disposed on a boundary area of the color filters having different colors from each other, so that mixing of the colors is prevented.

Claims

1. A touch display panel, comprising:

a display unit comprising;

a first base substrate comprising a plurality of pixel electrodes;

a second base substrate comprising a common electrode disposed on a first face of the second base substrate, the first face facing the first base substrate; and

an electrophoretic layer disposed between the pixel electrodes and the common electrode, the electrophoretic layer comprising a plurality of electrophoretic balls; and

a touch unit comprising;

a color filter layer comprising a plurality of color filters;

a first electrode part comprising first electrodes and first connecting electrodes on a second face of the second base substrate, the first electrodes being light blocking electrodes on a display area of the display unit being located at a boundary between a first color filter and a second color filter, the second color filter being different from the first color filter in color, the first connecting electrodes electrically connecting end portions of the first electrodes on the display area;

a first line electrode disposed on a peripheral area of the display unit adjacent to the display area, the first line electrode being electrically connected to one of the first connecting electrodes, the first line electrode being thicker than the first electrodes; and

a third base substrate comprising a second electrode part extending along a direction crossing the first electrodes,

wherein the first electrodes, the first connecting electrodes and the first line electrode comprise a same material as each other.

2. The touch display panel of claim 1, wherein the color filter layer is disposed on the second face of the second base substrate, and the first electrode part is disposed on the color filter layer.

3. The touch display panel of claim 1, wherein the color filter layer is disposed on the third base substrate, and the second electrode part is disposed on the color filter layer.

4. The touch display panel of claim 3, wherein the color filter layer comprises a light hole.

5. The touch display panel of claim 4, wherein the touch unit further comprises a reflecting plate disposed on the second face of the second base substrate, the reflecting plate being located in an area corresponding to a location of the light hole, the reflecting plate comprising a metallic material that is substantially the same type of material as a material forming the first electrode part.

6. A method of manufacturing a touch display panel, the method comprising:

forming a first substrate comprising a plurality of pixel electrodes formed on a first base substrate;

disposing a second base substrate on the first substrate, the second base substrate comprising a common electrode and an electrophoretic layer, the electrophoretic layer being formed on a first face of the second base substrate, the electrophoretic layer comprising a plurality of electrophoretic balls;

forming a color filter layer comprising a plurality of color filters on a second face of the second base substrate;

simultaneously forming a first electrode, a first connecting electrode and a first line electrode on the second face of the second base substrate, the first electrode being a light blocking electrode on a display area and being located at a boundary between a first color filter and a second color filter, the second color filter being different from the first color filter in color, the first connecting electrode electrically connecting end portions of the first electrode on the display area, the first line electrode being electrically connected to the first connecting electrode, the first line electrode being disposed on a peripheral area adjacent to the display area, the first line electrode being thicker than the first electrode;

forming a third substrate comprising a second electrode extending along a direction crossing the first electrode and a second line electrode electrically connected to the second electrode; and

combining the second base substrate with the third substrate such that the first electrode faces the second electrode.

7. The method of claim 6, wherein simultaneously forming the first electrode, the first connecting electrode, and the first line electrode further comprises:

forming a first recess part and a second recess part having different depths from each other on a printing substrate;

filling the first recess part and the second recess part of the printing substrate with a metallic material to form a first metal pattern and a second metal pattern, respectively;

transferring the first metal pattern and the second metal pattern on a blanket; and

transferring the first metal pattern and the second metal pattern from the blanket to the second face of the second base substrate to form the first electrode, the first connecting electrode and the first line electrode.

8. The method of claim 7, wherein forming the third substrate further comprises:

forming the second electrode on the third substrate using a transparent conductive material; and

forming the second line electrode on the third base substrate comprising the second electrode using a metallic material.

9. The method of claim 6, wherein the color filter layer is formed by a printing method.

10. The method of claim 6, further comprising spreading a plurality of spacers on the second face of the second base substrate.

11. A method of manufacturing a touch display panel, the method comprising:

forming a first substrate comprising a plurality of pixel electrodes formed on a first base substrate;

disposing a second base substrate on the first substrate, the second base substrate comprising a common electrode and an electrophoretic layer, the electrophoretic layer being formed on a first face of the second base substrate, the electrophoretic layer comprising a plurality of electrophoretic balls;

forming a third base substrate comprising a second electrode, a second line electrode and a color filter layer, the second line electrode being electrically connected to the second electrode, the color filter layer comprising a plurality of color filters;

simultaneously forming a first electrode, a first connecting electrode, a first line electrode, and a reflecting plate on a second face of the second base substrate, the first electrode being a light blocking electrode on a display area and being located at a boundary between a first color filter and a second color filter, the second color filter being different from the first color filter in color, the first electrode extending along a direction crossing the second electrode, the first connecting electrode electrically connecting end portions of the first electrode on the display area, the first line electrode being electrically connected to the first connecting electrode, the first line electrode being disposed on a peripheral area adjacent to the display area, the first line electrode being thicker than the first electrode; and

combining the second base substrate with the third substrate such that the first electrode part faces the second electrode part.

12. The method of claim 11, wherein forming the third substrate further comprises:

forming the color filter layer on the third base substrate by a printing method;

forming the second electrode on the third base substrate using a transparent conductive material; and

forming the second line electrode on the third base substrate by a printing method.

13. The method of claim 12, wherein the color filter layer comprises a light hole corresponding to the reflecting plate.

14. The method of claim 12, wherein simultaneously forming the first electrode, the first connecting electrode, the first line electrode, and the reflecting plate further comprises:

forming a first recess part, a second recess part, and a third recess part on a printing substrate, the first recess part and the third recess part having a different depth from the second recess part;

filling the first recess part, the second recess part, and the third recess part of the printing substrate with a metallic material to form a first metal pattern, a second metal pattern and a third metal pattern, respectively;

transferring the first metal pattern, the second metal pattern and the third metal pattern to a blanket; and

transferring the first metal pattern, the second metal pattern, and the third metal pattern from the blanket to the second face of the second base substrate to form the first electrode, the first connecting electrode, the first line electrode and the reflecting plate.

15. The method of claim 11, further comprising forming a plurality of spacers on the second face of the second base substrate.

16. A touch display panel, comprising:

a display unit comprising a first substrate and at least a first portion of a second substrate, the display unit configured to display an image; and

a touch unit comprising a third substrate, at least a second portion of the second substrate, a first touch electrode, a first line electrode, a second touch electrode, a second line electrode, and a color filter layer, the color filter layer comprising a first color filter and a second color filter, the touch unit being configured to detect a touch position on the touch display panel,

wherein the second substrate is between the first substrate and the third substrate, and

wherein the first touch electrode is a light blocking electrode and is disposed at a boundary between the first color filter and the second color filter,

wherein the second touch electrode comprises a transparent conductive material and extends in a direction crossing the first touch electrode, and

wherein the first line electrode is electrically connected to the first touch electrode, the first line electrode is thicker than the first touch electrode, and the first line electrode and the first touch electrode comprise a same material as each other.

17. The touch display panel of claim 16, wherein the display unit comprises a electrophoretic layer disposed between the first substrate and the first portion of the second substrate.

18. The touch display panel of claim 17, wherein a common electrode is disposed on the first portion of the second substrate and a pixel electrode is disposed on the first substrate, and the electrophoretic layer is disposed between the common electrode and the pixel electrode, the electrophoretic layer comprising at least one electrophoretic ball.

19. The touch display panel of claim 18, wherein the second substrate is separated from the third substrate by a spacer.

20. The touch display panel of claim 19, wherein the color filter layer is disposed on the second portion of the second substrate.

21. The touch display panel of claim 19, wherein the color filter layer is disposed on the third substrate.

22. The touch display panel of claim 21, wherein the color filter layer comprises a light hole.

23. The touch display panel of claim 21, wherein the touch unit further comprises a reflecting plate disposed on the second portion of the second substrate, the reflecting plate being located at the light hole, the reflecting plate comprising a metallic material, which is the same as the material of the first electrode.