Electrophoretic display with image formed on one side of the common electrode layer

Abstract

An electrophoretic display with imaging on a common electrode layer: A first substrate includes a thin-film transistor layer and a pixel electrode layer, a high-color-ratio, high-brightness color filter layer, a second substrate, a common electrode layer disposed on one side of the second substrate, and a display material layer sandwiched between the first substrate and the second substrate. The pixel electrode layer includes multiple pixel electrodes. The high-color-ratio, high-brightness color filter layer is disposed on one side of the second substrate and includes multiple filter unit groups, each of which includes at least six filter blocks of different colors, including multiple primary color filter blocks and multiple non-primary color filter blocks. Each filter block corresponds one-to-one with a transparent pixel electrode. The display material layer is filled with a colloidal solution containing charged color particles of at least one color.

Claims

1. An electrophoretic display with imaging on a common electrode layer side, comprising: a first substrate including a first surface and a second surface, the second surface having a thin-film transistor layer and a pixel electrode layer disposed thereon, the thin-film transistor layer including a plurality of thin-film transistors, a plurality of gate lines and a plurality of data lines, the pixel electrode layer including a plurality of pixel electrodes; a second substrate including a third surface and a fourth surface; a common electrode layer disposed on the third surface of the second substrate; a high-color-ratio, high-brightness color filter layer disposed on one side of the second substrate, including a plurality of filter unit groups, each filter unit group including at least six different color filter blocks, the different color filter blocks including a plurality of primary color filter blocks and a plurality of non-primary color filter blocks; each filter block corresponding one-to-one with a pixel electrode; a display material layer sandwiched between the first substrate and the second substrate, the display material layer being filled with a colloidal solution containing charged color particles of at least one color; The filter unit group consists of red filter blocks, blue filter blocks, green filter blocks, magenta filter blocks, yellow filter blocks, and cyan filter blocks arranged alternately in the vertical or horizontal direction.

2. An electrophoretic display imaged on the common electrode layer side as described in claim 1, wherein when the electrophoretic display displays white in its entirety, its display brightness is not less than 30% of the incident light brightness.

3. An electrophoretic display imaged on the common electrode layer side as described in claim 1, wherein the plurality of non-primary color filter patches include a magenta filter patch, a yellow filter patch, and a cyan filter patch.

4. An electrophoretic display imaged on the common electrode layer side as described in claim 3, wherein the plurality of primary color filters include a red filter, a blue filter, and a green filter.

5. An electrophoretic display imaged on the common electrode layer side as described in claim 1, wherein the plurality of non-primary color filter patches contain at least two different colors, and one of the non-primary color filter patches has a full width at half maximum (FWHM) of more than 150 nm in the visible light range of 380 nm to 780 nm.

6. An electrophoretic display imaged on the common electrode layer side as described in claim 4, wherein the filter unit group is formed by the red filter block, the blue filter block, the green filter block, the magenta filter block, the yellow filter block, and the cyan filter block arranged side by side in the longitudinal or transverse direction.

7. An electrophoretic display imaged on the common electrode layer side as described in claim 4, wherein the filter unit group is formed by the red filter block, the blue filter block and the green filter block, the magenta filter block, the yellow filter block and the cyan filter block arranged in series in the longitudinal or transverse direction.

8. An electrophoretic display imaged on the side of a common electrode layer as described in claim 1, wherein each of the filter unit groups is arranged to extend laterally and longitudinally to form a complete color filter layer.

9. An electrophoretic display imaged on the common electrode layer side as described in claim 9, wherein the filter color patches of adjacent filter unit groups are arranged in a specific displacement relationship.

10. An electrophoretic display imaged on the common electrode layer side as described in claim 4, wherein the red filter block, the blue filter block, the green filter block, the magenta filter block, the yellow filter block, and the cyan filter block form a 6x6 filter block matrix, and the 6x6 filter block matrix is ​​arranged in the longitudinal and transverse directions to form the high-color-rendering color filter layer.

11. An electrophoretic display imaged on the common electrode layer side as described in claim 1, wherein any of the filter patches is a different color from the surrounding adjacent filter patches.

12. An electrophoretic display imaged on the common electrode layer side as described in claim 1, wherein any two adjacent filter patches do not overlap in the projection direction, or the overlapping area in the projection direction is less than 20 percent of the area of ​​the filter patches.

13. An electrophoretic display imaged on the common electrode layer side as described in claim 1, wherein at least one of the filter color blocks has a transparent area around it.

14. An electrophoretic display imaged on the common electrode layer side as described in claim 1, wherein the high-color-high-brightness color filter layer is disposed between the common electrode layer and the second substrate.

15. An electrophoretic display imaged on the common electrode layer side as described in claim 1, wherein the high-color-high-brightness color filter layer is disposed between the common electrode layer and the display material layer.

16. An electrophoretic display imaged on the common electrode layer side as described in claim 3, wherein the plurality of primary color filter blocks include a red filter block formed by superimposing magenta and yellow blocks, a blue filter block formed by superimposing magenta and cyan blocks, and a green filter block formed by superimposing yellow and cyan blocks.

17. An electrophoretic display imaged on the common electrode layer side as described in claim 16, wherein the high-color, high-brightness color filter layer is completed using the same photomask through three photolithography processes.

18. The electrophoretic display as described in claim 4, which images on the side of a common electrode layer, wherein in the area where red needs to be displayed, charged white particles are controlled to move and accumulate on the surface of the primary color red filter block, the non-primary color magenta and yellow filter blocks to display red.

19. The electrophoretic display imaged on the common electrode layer side as described in claim 4, wherein in the area where green needs to be displayed, charged white particles are controlled to move and accumulate on the surface of the primary green filter block, the non-primary cyan and yellow filter blocks to display green.

20. The electrophoretic display as described in claim 4, which images on the side of a common electrode layer, wherein in the area where blue needs to be displayed, charged white particles are controlled to move and accumulate on the surface of the primary blue filter block, the non-primary magenta and cyan filter blocks to display blue.

21. The electrophoretic display imaged on the common electrode layer side as described in claim 4, wherein in the area where yellow needs to be displayed, charged white particles are controlled to move and accumulate on the surface of the non-primary yellow filter block, the primary red and green filter blocks to display yellow.

22. The electrophoretic display as described in claim 4, which images on the side of a common electrode layer, wherein in the area where cyan needs to be displayed, charged white particles are controlled to move and accumulate on the surface of a non-primary cyan filter block, a primary blue filter block, and a primary green filter block to display cyan.

23. The electrophoretic display as described in claim 4, which images on the side of a common electrode layer, wherein in the area displaying magenta, charged white particles are controlled to move and accumulate on the surface of a non-primary magenta filter patch, a primary red filter patch, and a primary blue filter patch to display magenta.

24. The electrophoretic display imaged on the common electrode layer side as described in claim 4, wherein in the area where white needs to be displayed, charged white particles are controlled to move and accumulate on the surface of non-primary color yellow, magenta, and cyan color filters and primary color blue, red, and green color filters to display white.

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