Back to results
US 9,285,520 B2Granted
Optical touch display device and color filter thereof
AssigneeAu Optronics Corporation
InventorsChien-Kai Chen, Chia-Hao Li, Chen-Hsien Liao
Life of this patent
Estimating the term…
Abstract
A color filter including a substrate and a green photoresist is provided. The green photoresist is disposed on the substrate, and the spectrum function thereof has a first peak within a wavelength window between 480 nm and 550 nm. Whereas a transmittance intensity of the spectrum function of green photoresist at wavelength 750 nm is greater than that of 0.5 times of the transmittance intensity of the first peak. An optical touch display device with the color filter is also provided.
Claims9
A color filter, comprising:
- a substrate;
- a green photoresist disposed on the substrate, wherein the spectrum function of the green photoresist has a first peak within a wavelength window substantially between 480 nm and 550 nm, and a transmittance intensity of the spectrum function of green photoresist at wavelength 750 nm is substantially greater than that of 0.5 times of the transmittance intensity of the first peak;
- and
- a blue photoresist disposed on the substrate, wherein the spectrum function of the blue photoresist has a second peak within a wavelength window substantially between 420 nm and 470 nm, and a transmittance intensity of the spectrum function of the blue photoresist at wavelength 750 nm is substantially greater than that of 0.3 times of the transmittance intensity of the second peak,
- wherein the transmittance intensity of the first peak is substantially between 0.9 and 1.0, the transmittance intensity of the spectrum function of green photoresist at wavelength 750 nm is substantially between 0.8 and 0.9 and at between wavelength 670 nm and 700 nm is substantially zero, the transmittance intensity of the second peak is substantially between 0.8 and 0.9, the transmittance intensity of the spectrum function of blue photoresist at wavelength 750 nm is substantially between 0.4 and 0.5, and greater than 0.4 and at between wavelength 560 nm and 630 nm is substantially zero.
2 more elements
An optical touch display device, comprising:
- an active elements array substrate;
- a color filter disposed above the active elements array substrate, the color filter comprising:
- a substrate;
- and
- a green photoresist disposed on the substrate, wherein the spectrum function of the green photoresist has a first peak within a wavelength window substantially between 480 nm and 550 nm, a transmittance intensity of the spectrum function of green photoresist at wavelength 750 nm is substantially greater than that of 0.5 times of the transmittance intensity of the first peak, and the transmittance intensity of the first peak is substantially between 0.9 and 1.0, and the transmittance intensity of the spectrum function of green photoresist at wavelength 750 nm is substantially between 0.8 and 0.9 and at between wavelength 670 nm and 700 nm is substantially zero;
- a blue photoresist disposed on the substrate, wherein the spectrum function of the blue photoresist has a second peak within a wavelength window substantially between 420 nm and 470 nm, and a transmittance intensity of the spectrum function of the blue photoresist at wavelength 750 nm is substantially greater than that of 0.3 times of the transmittance intensity of the second peak, the transmittance intensity of the second peak is substantially between 0.8 and 0.9, the transmittance intensity of the spectrum function of blue photoresist at wavelength 750 nm is substantially between 0.4 and 0.5, and greater than 0.4 and at between wavelength 560 nm and 630 nm is substantially zero;
- a plurality of light-detecting elements disposed on the active elements array substrate and corresponded to the green photoresist;
- a display medium layer disposed between the color filter and the active elements array substrate;
- and
- a back light source disposed under the active elements array substrate.
7 more elements
Dependencies are inferred from the claim text.