Integrated touch module and touch display device having the same
An integrated touch module and a touch display device are provided. The integrated touch module has a touch sensing structure formed on a polymer film. The polymer film, a liquid crystal phase retardation layer, and a linear polarizing layer constitute a circular polarizing element. The average reflectance of the circular polarizing element in the visible light range is less than 5%, and the standard deviation of the reflectance is less than 0.2%. The touch display device includes the integrated touch module.
1. An integrated touch module, comprising:
a silver nanowire touch sensing structure formed on a polymer film, the polymer film having a phase retardation value of between 100 nm and 160 nm for a wavelength of 550 nm;
wherein the polymer film, a liquid crystal phase retardation layer, and a linear polarizing layer constitute a circular polarizing element, an average reflectance of the circular polarizing element in a visible light range is less than 5% and a standard deviation of the reflectance is less than 0.2%.
2. The integrated touch module of claim 1 , wherein the average reflectance of the integrated touch module in the visible light range is less than 6% and the standard deviation of the reflectance is less than 0.4%.
3. The integrated touch module of claim 1 , wherein the average reflectance of the circular polarizing element in a wavelength range of 450 nm-500 nm is less than 6%, and a reflectance difference between the average reflectance of the circular polarizing element in the wavelength range of 450 nm-500 nm and the reflectance for the wavelength of 550 nm is less than 5%.
4. The integrated touch module of claim 1 , wherein the polymer film is configured to withstand a process temperature range of the silver nanowire touch sensing structure.
5. The integrated touch module of claim 4 , wherein a glass transition temperature of the polymer film is greater than or equal to a highest process temperature of making the silver nanowire touch sensing structure on the polymer film.
6. The integrated touch module of claim 5 , wherein the highest process temperature of the silver nanowire touch sensing structure is 135-140° C., and a main component of the polymer film is a methyl acrylate (PMMA), cycloolefin polymer (COP), polycarbonate (PC), polyethylene terephthalate (PET), colorless polyimide (CPI) or derivatives thereof, and the glass transition temperature of the polymer film is greater than or equal to 135-140° C.
7. The integrated touch module of claim 1 , wherein the polymer film is a positive dispersion type phase retardation layer with a thickness of about 25 μm, the liquid crystal phase retardation layer is a positive dispersion type phase retardation layer with a thickness of about 2 μm, and an optical axis difference between the polymer film and the liquid crystal phase retardation layer is about 60 degrees.
8. The integrated touch module of claim 1 , wherein the silver nanowire touch sensing structure comprises:
a silver nanowire electrode layer directly disposed on the polymer film.
9. The integrated touch module of claim 1 , wherein the silver nanowire touch sensing structure comprises:
two silver nanowire electrode layers, the two silver nanowire electrode layers are respectively arranged on an upper surface and a lower surface of the polymer film.
10. The integrated touch module of claim 1 , wherein a reflectance difference between the average reflectance of the circular polarizing element in a wavelength range of 450 nm-500 nm and the average reflectance of a wavelength range of 525 nm-675 nm is less than 10%.
11. A touch display device, comprising:
a display panel having a display area; and
the integrated touch module of claim 1 , which is disposed on the display panel, wherein the silver nanowire touch sensing structure of the integrated touch module correspondingly overlaps the display area.