US-12619119-B2 - Color electrophoretic display

Abstract

A color electrophoretic display includes a display region, a pixel array, a display medium layer, an optical layer, a first color filter array, and a second color filter array. The display region includes multiple sub-pixel regions. The pixel array corresponds to the display region in position. The display medium layer is located on the pixel array. The optical layer is located on the display medium layer. The first color filter array is located on the optical layer. The second color filter array is located between the display medium layer and the optical layer.

Inventors

• Xian-Teng CHUNG
• Liang-Yu Lin
• Jau-Min Ding
• Po-Yuan Lo
• Ian French

Assignees

• E INK HOLDINGS INC.

Dates

Publication Date

20260505

Application Date

20230217

Priority Date

20220415

Claims (16)

1. 1 . A color electrophoretic display, comprising: a display region comprising a plurality sub-pixel regions; a pixel array corresponding to the display region in position; a display medium layer located on the pixel array; an optical layer located on the display medium layer; a first color filter array located on the optical layer, wherein a pixel fill factor of the first color filter array is in a range from 25% to 35%; and a second color filter array located between the display medium layer and the optical layer.
2. 2 . The color electrophoretic display of claim 1 , wherein the first color filter array and the second color filter array have different pixel fill factors.
3. 3 . The color electrophoretic display of claim 1 , wherein a pixel fill factor of the first color filter array is smaller than a pixel fill factor of the second color filter array.
4. 4 . The color electrophoretic display of claim 3 , wherein the pixel fill factor of the second color filter array is in a range from 70% to 90%.
5. 5 . The color electrophoretic display of claim 1 , wherein the first color filter array comprises a plurality of first color resists, and each one of the first color resists comprises a plurality of sections separated from each other.
6. 6 . The color electrophoretic display of claim 1 , wherein the first color filter array comprises a first color resist, the second color filter array comprises a second color resist, the first color resist corresponds to the second color resists in position, and the first color resist and the second color resist have the same color.
7. 7 . The color electrophoretic display of claim 1 , wherein the first color filter array comprises a first color resist, the second color filter array comprises a second color resist, the first color resist corresponds to the second color resists in position, and the first color resist and the second color resist have different colors.
8. 8 . The color electrophoretic display of claim 7 , wherein the first color resist has a first color, the second color resist has a mixed color, and the mixed color comprises the first color and a second color different from the first color.
9. 9 . A color electrophoretic display, comprising: a display region comprising a plurality sub-pixel regions; a pixel array corresponding to the display region in position; a display medium layer comprising a plurality of microcapsules, wherein the display medium layer is located on the pixel array; an optical layer located on the display medium layer; a first color filter array located on the optical layer, wherein a pixel fill factor of the first color filter array is in a range from 25% to 35%; and a second color filter array formed on the microcapsules.
10. 10 . The color electrophoretic display of claim 9 , wherein the second color filter array is configured to be printed or ink-jetted on the microcapsules.
11. 11 . The color electrophoretic display of claim 9 , wherein a pixel fill factor of the first color filter array is smaller than a pixel fill factor of the second color filter array.
12. 12 . The color electrophoretic display of claim 11 , wherein the pixel fill factor of the second color filter array is in a range from 70% to 90%.
13. 13 . The color electrophoretic display of claim 9 , wherein the first color filter array comprises a plurality of first color resists, and each one of the first color resists comprises a plurality of sections separated from each other.
14. 14 . The color electrophoretic display of claim 9 , wherein the first color filter array comprises a first color resist, the second color filter array comprises a second color resist, the first color resist corresponds to the second color resists in position, and the first color resist and the second color resist have the same color.
15. 15 . The color electrophoretic display of claim 9 , wherein the first color filter array comprises a first color resist, the second color filter array comprises a second color resist, the first color resist corresponds to the second color resists in position, and the first color resist and the second color resist have different colors.
16. 16 . The color electrophoretic display of claim 15 , wherein the first color resist has a first color, the second color resist has a mixed color, and the mixed color comprises the first color and a second color different from the first color.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to Taiwan Application Serial Number 111114361, filed Apr. 15, 2022, which is herein incorporated by reference in its entirety. BACKGROUND Field of Invention The present invention relates to a color electrophoretic display. Description of Related Art A printed color filter layer is use to filter the light reflected by the display medium layer so as to form the color image in a color electrophoretic display nowadays. However, when the pixel fill factor of the color resists is too high, color mixing problem caused by adjacent two of the color resists may occur easily. When the pixel fill factor of the color resists is too low, the color performance of the color electrophoretic display may be affected. Accordingly, it is still a development direction for the industry to provide a color filter array which can solve the problems mentioned above. SUMMARY The invention provides a color electrophoretic display. In some embodiments, the color electrophoretic display includes a display region, a pixel array, a display medium layer, an optical layer, a first color filter array, and a second color filter array. The display region includes multiple sub-pixel regions. The pixel array corresponds to the display region in position. The display medium layer is located on the pixel array. The optical layer is located on the display medium layer. The first color filter array is located on the optical layer. The second color filter array is located between the display medium layer and the optical layer. In some embodiments, the first color filter array and the second first color filter array have different pixel fill factors. In some embodiments, a pixel fill factor of the first color filter array is smaller than a pixel fill factor of the second color filter array. In some embodiments, the pixel fill factor of the first color filter array is in a range from 25% to 35%. In some embodiments, the pixel fill factor of the second color filter array is in a range from 70% to 90%. In some embodiments, the first color filter array includes a plurality of first color resists, and each one of the first color resists includes a plurality sections separated from each other. In some embodiments, the first color filter array includes a first color resist, the second color filter array includes a second color resist, the first color resist corresponds to the second color resists in position, and the first color resist and the second color resist have the same color. In some embodiments, the first color filter array includes a first color resist, the second color filter array includes a second color resist, the first color resist corresponds to the second color resists in position, and the first color resist and the second color resist have different colors. In some embodiments, the first color resist has a first color, the second color resist has a mixed color, and the mixed color comprises the first color and a second color different from the first color. Another aspect of the present disclosure is a color electrophoretic display. In some embodiments, the color electrophoretic display includes a display region, a pixel array, a display medium layer, an optical layer, a first color filter array, and a second color filter array. The display region includes multiple sub-pixel regions. The pixel array corresponds to the display region in position. The display medium layer includes multiple microcapsules and is located on the pixel array. The optical layer is located on the display medium layer. The first color filter array is located on the optical layer. The second color filter array is formed on the microcapsules. In some embodiments, the second color filter array is configured to be printed or ink-jetted on the microcapsules. In some embodiments, a pixel fill factor of the first color filter array is smaller than a pixel fill factor of the second color filter array. In some embodiments, the pixel fill factor of the first color filter array is in a range from 25% to 35%. In some embodiments, the pixel fill factor of the second color filter array is in a range from 70% to 90%. In some embodiments, the first color filter array includes a plurality of first color resists, and each one of the first color resists includes a plurality sections separated from each other. In some embodiments, the first color filter array includes a first color resist, the second color filter array includes a second color resist, the first color resist corresponds to the second color resists in position, and the first color resist and the second color resist have the same color. In some embodiments, the first color filter array includes a first color resist, the second color filter array includes a second color resist, the first color resist corresponds to the second color resists in position, and the first color resist and the second color resist have different colors. In some embodiments, the fi