TOUCH DISPLAY PANEL, SEALANT THEREOF, AND COMPOSITION FOR FORMING SEALANT

• US 20110025612A1
• Filed: 10/06/2009
• Published: 02/03/2011
• Est. Priority Date: 07/31/2009
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Shiau, Yi-Hau
• Application Number:
  US12/574,698
• Publication Number:
  US 20110025612A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: C08F 2/48 by ultraviolet or visible light
• CPC Class Codes: C08G 59/1466 Acrylic or methacrylic acids
• CPC Class Codes: C08K 3/013 Fillers, pigments or reinforcing additives
• CPC Class Codes: C08K 5/0025 Crosslinking or vulcanising agents; including accelerators
• CPC Class Codes: C09J 163/10 Epoxy resins modified by unsaturated compounds
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

A touch display panel includes a first substrate, a second substrate, a touch-sensing structure, a display medium and a sealant. The touch-sensing structure and the display medium are sealed between the first and second substrates by the sealant. The sealant is formed by performing a polymerization reaction on a composition. The composition includes a bis-phenol A type epoxy acrylic monomer (20 to 50 weight percent (wt %)), an acrylic monomer (2 to 8 wt %), a photo-initiator reagent (0.5 to 5 wt %) and a hardener reagent (1 to 5 wt %). The acrylic monomer has a chemical formula represented as the following:

• • wherein R1 is selected from hydrogen or an alkyl group having 1 to 3 carbons, and R2 is selected from hydrogen or an alkyl group having 1 to 20 carbons.

Claims

1. A touch display panel, comprising:

a first substrate;

a second substrate disposed opposite to the first substrate;

a touch-sensing structure, disposed between the first substrate and the second substrate, the touch-sensing structure having a sensing gap;

a display medium, disposed between the first substrate and the second substrate and used to display an image; and

a sealant, disposed between the first substrate and the second substrate and sealing the touch-sensing structure and the display medium between the first substrate and the second substrate, wherein the sealant is formed by performing a polymerization reaction on a composition, the composition comprising;

a bis-phenol A type epoxy acrylic monomer, an amount thereof being 20 to 50 weight percent (wt %);

an acrylic monomer, an amount thereof being 2 to 8 wt %, said acrylic monomer having a chemical formula as shown in a following formula 1;

2. The touch display panel of claim 1, wherein the sealant further comprises a bis-phenol A type epoxy di-acrylic monomer, an amount thereof being 2 to 25 wt %.

3. The touch display panel of claim 1, wherein the sealant further comprises a filler, an amount thereof being 15 to 30 wt %.

4. The touch display panel of claim 3, wherein a material of the filler is selected from the group consisting of barium silicide sulfide, barium carbonate, strontium carbonate, titanium dioxide, quartz, calcium silicate, calcium carbonate, aluminum silicate, magnesium silicate, aluminum oxide, magnesium oxide, calcium oxide, kaolinite, silicon dioxide, talcum powder, aluminum nitride and boron nitride.

5. The touch display panel of claim 1, wherein the photo-initiator reagent comprises an acetophenone compound.

6. The touch display panel of claim 1, wherein the hardener reagent comprises a dihydrizade with a heterocyclic ring.

7. The touch display panel of claim 1, wherein a ratio of the acrylic monomer to the photo-initiator reagent is 10:

1.

8. The touch display panel of claim 1, wherein an elastic recovery rate of the sealant is from 60% to 85%.

9. The touch display panel of claim 1, wherein the first substrate and the second substrate have a display region, and a distance between the display region and the sealant is less than 700 μ

m.

10. The touch display panel of claim 1, wherein the sealant further comprises an elastic spacer.

11. The touch display panel of claim 1, wherein the sealant further comprises an elastic conductive ball.

12. A composition used to form a sealant which is suitable for a display panel, comprising:

a bis-phenol A type epoxy acrylic monomer, an amount thereof being 20 to 50 wt %;

an acrylic monomer, an amount thereof being 2 to 8 wt %, said acrylic monomer having a chemical formula as shown in a following formula 1;

13. The composition used to form the sealant of claim 12, further comprising a bis-phenol A type epoxy di-acrylic monomer, an amount thereof being 2 to 25 wt %.

14. The composition used to form the sealant of claim 12, further comprising a filler, an amount thereof being 15 to 30 wt %.

15. The composition used to form the sealant of claim 14, wherein a material of the filler is selected from the group consisting of barium silicide sulfide, barium carbonate, strontium carbonate, titanium dioxide, quartz, calcium silicate, calcium carbonate, aluminum silicate, magnesium silicate, aluminum oxide, magnesium oxide, calcium oxide, kaolinite, silicon dioxide, talcum powder, aluminum nitride and boron nitride.

16. The composition used to form the sealant of claim 12, wherein the photo-initiator reagent comprises an acetophenone compound.

17. The composition used to form the sealant of claim 12, wherein the hardener reagent comprises a dihydrizade with a heterocyclic ring.

18. The composition used to form the sealant of claim 12, wherein a ratio of the acrylic monomer to the photo-initiator reagent is 10:

1.

19. A sealant, formed by performing a polymerization reaction on the composition of claim 13.

20. The sealant of claim 19, wherein an elastic recovery rate of the sealant is from 60% to 85%.

21. A composition used to form a sealant which is suitable for a display panel, comprising:

an epoxy acrylic monomer, an amount thereof being 20 to 50 weight percent (wt %);

an acrylic monomer, an amount thereof being 2 to 8 wt %, said acrylic monomer having a chemical formula as shown in a following formula 1;