Color filter array and color electrophoretic display having a color filter array

Abstract

A color filter layer array and a color electrophoretic display having the color filter layer array, the color filter layer array comprising a plurality of first color resist, a plurality of second color resist and a plurality of third color resist. The first color resist individually has a first color. The second color resist individually has a second color. The third color resist individually has a third color. The reflectivity of the third color resist is greater than the reflectivity of the first color resist and the reflectivity of the second color resist. The first color resist is continuously arranged in a first diagonal direction and a second diagonal direction, and the third color resist is not continuously arranged in the second diagonal direction. By interleaving the first color resist and the second color resist, the color resist arrangement regularity of the color filter layer array is reduced, and the stripe pattern of the first color resist and the second color resist in the white picture can be avoided.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a color filter array and a color electrophoretic display having the color filter array. BACKGROUND

[0002] A color electrophoretic display nowadays generates a corresponding color pattern by printing color filters to filter light reflected by a display medium layer. However, when color filters with low reflectivity are arranged adjacent to each other or with high regularity, a dark area or a stripe pattern can be easily recognized in a white picture. In addition, if the length or area of a color filter is large, a color exposure problem can occur when a black and white display picture has a pattern close to the size of a sub-pixel area, resulting in the color of the color filter appearing in the display picture.

[0003] Therefore, how to provide a color filter array to overcome the above problems is still one of the goals of the industry's efforts. SUMMARY

[0004] One technical aspect of the present disclosure is a color filter array.

[0005] In one embodiment of the present disclosure, the color filter array includes a plurality of first color filters, a plurality of second color filters, and a plurality of third color filters. The first color filters each have a first color. The second color filters each have a second color different from the first color. The third color filters each have a third color different from the first color and the second color. The reflectivity of the third color filters is greater than the reflectivity of the first color filters and the reflectivity of the second color filters. The first color filters are continuously arranged in a first diagonal direction and a second diagonal direction, and the third color filters are not continuously arranged in the second diagonal direction.

[0006] In one embodiment of the present disclosure, the third color filters are continuously arranged in the first diagonal direction.

[0007] In one embodiment of the present disclosure, the second color filters are continuously arranged in the first diagonal direction and the second diagonal direction.

[0008] In one embodiment of the present disclosure, an area of each third color filter is greater than an area of each first color filter and an area of each second color filter.

[0009] In one embodiment of the present disclosure, each first color filter has two side edges connected thereto, and the two side edges are arranged adjacent to two of the second color filters, respectively.

[0010] In one embodiment of the present disclosure, each second color filter has two side edges connected thereto, and the two side edges are arranged adjacent to two of the first color filters, respectively.

[0011] Another technical aspect of the present disclosure is a color electrophoretic display.

[0012] In an embodiment of the present disclosure, a color electrophoretic display includes a display area, a pixel array, a display medium layer, and a color filter layer array. The display area includes a plurality of sub-pixel areas. The pixel array corresponds to the display area. The display medium layer is on the pixel array. The color filter layer array has a plurality of rows arranged along a first direction and a plurality of columns arranged along a second direction. The first direction is substantially perpendicular to the second direction, wherein each sub-pixel area corresponds to a column and a row of the color filter layer array.

[0013] In an embodiment of the present disclosure, two adjacent ones of the first color filters are located on different columns and different rows, and two adjacent ones of the second color filters are located on different columns and different rows.

[0014] In an embodiment of the present disclosure, a vertical projection of the first color filter corresponds to a single sub-pixel area, and a vertical projection of each second color filter corresponds to a single sub-pixel area.

[0015] In an embodiment of the present disclosure, a vertical projection of each third color filter corresponds to two sub-pixel areas.

[0016] In the above embodiment, by interleaving the first color filter and the second color filter, the regularity of the color filter arrangement of the color filter layer array is reduced, and the stripe pattern of the first color filter and the second color filter in a white image can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a top view of a color electrophoretic display according to an embodiment of the present disclosure;

[0018] Figure 2 FIG. 2 is a cross-sectional view along line 2-2 of FIG. 1; Figure 1

[0019] Figure 3 FIG. 5 is a top view of a color electrophoretic display according to another embodiment of the present disclosure;

[0020] Figure 4A FIG. 6 is a distribution diagram of a first color filter and a second color filter of a known color electrophoretic display;

[0021] Figure 4B FIG. 7 is a distribution diagram of a first color filter and a second color filter of a color electrophoretic display according to another embodiment of the present disclosure.

[0022] SYMBOL DESCRIPTION

[0023] 100, 100a: color electrophoretic display

[0024] 102: sub-pixel area

[0025] 110: color filter layer array

[0026] 110R: first color filter​

[0027] 110B: second color resist

[0028] 110G: third color resist

[0029] 120: pixel array

[0030] 130: display medium layer

[0031] 140: adhesive layer

[0032] 150: transparent substrate

[0033] DR: display region

[0034] D1: first direction

[0035] D2: second direction

[0036] D3: first diagonal direction

[0037] D4: second diagonal direction

[0038] 2-2: line segment

[0039] U: light filtering unit

[0040] n1-n3: column

[0041] r1-r6: row

[0042] R1, R2, B1, B2: arrow DETAILED DESCRIPTION

[0043] Embodiments of the present disclosure will be described below with reference to the accompanying drawings. For the purpose of explanation, numerous specific details will be set forth in the following description in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art that the embodiments can be practiced without some or all of these specific details. In other instances, well known structures and devices are not described in exhaustive detail in order to avoid obscuring the description.

[0044] Figure 1 FIG. 1 is a top view of a color electrophoretic display 100 according to an embodiment of the present disclosure. Figure 2 FIG. 2 is a cross-sectional view along line segment 2-2 of FIG. 1. See also FIG. 3. Figure 1 FIG. 4 is a cross-sectional view along line segment 4-4 of FIG. 1. See also FIG. 5. Figure 1 FIG. 6 is a cross-sectional view along line segment 6-6 of FIG. 1. See also FIG. 7. Figure 2The color electrophoretic display 100 includes a color filter layer array 110, a pixel array 120, and a display medium layer 130. The display medium layer 130 is located on the pixel array 120. The color electrophoretic display 100 has a display area DR, which includes a plurality of subpixel areas 102. The pixel array 120 corresponds to the subpixel areas 102 of the display area DR. In this embodiment, the first direction D1 is a vertical direction, the second direction D2 is a horizontal direction, and the first direction D1 and the second direction D2 are perpendicular to each other.

[0045] like Figure 2 As shown, the color electrophoretic display 100 further includes two adhesive layers 140 and a transparent substrate 150. The adhesive layers 140 are located between the pixel array 120 and the display medium layer 130, and between the color filter layer array 110 and the display medium layer 130. The transparent substrate 150 is located on the color filter layer array 110. The structural arrangement between the color filter layer array 110 and the display medium layer 130 can be changed according to actual needs, and this disclosure is not limited thereto. For clarity, the transparent substrate 150... Figure 1 Omitted in .

[0046] like Figure 1 As shown, the color filter array 110 includes multiple first color resists 110R, multiple second color resists 110B, and multiple third color resists 110G. The first color resists 110R have a first color, the second color resists 110B have a second color, and the third color resists 110G have a third color. For example, in this embodiment, the first color resist 110R is red, the second color resist 110B is blue, and the third color resist 110G is green, but this disclosure is not limited to this. In this embodiment, the reflectivity of the third color resist 110G is greater than that of the first color resist 110R, and the reflectivity of the first color resist 110R is greater than that of the second color resist 110B. Specifically, the reflectivity of the blue color resist is approximately 19%–22%, the reflectivity of the red color resist is approximately 22.5%–25.5%, and the reflectivity of the green color resist is approximately 63%–66%.

[0047] like Figure 1 As shown, the area of ​​the third color resist 110G is larger than the area of ​​the first color resist 110R and the area of ​​the second color resist 110B. In this embodiment, the vertical projection of each first color resist 110R corresponds to a single primary pixel area 102, and the vertical projection of each second color resist 110B corresponds to a single primary pixel area 102. The vertical projection of each third color resist 110G corresponds to two primary pixel areas 102. That is, the area of ​​the first color resist 110R and the second color resist 110B is equivalent to the area of ​​the region with filtering function in the secondary pixel area 102, while the area of ​​the third color resist 110G is equivalent to twice the area of ​​the region with filtering function in the secondary pixel area 102, but this disclosure is not limited thereto.

[0048] Because the first color resist 110R and the second color resist 110B have low reflectivity, their stripe patterns are easily noticeable as dark areas on a white screen. Therefore, by making the areas of the first color resist 110R and the second color resist 110B smaller than the area of ​​the third color resist 110G, the stripe patterns of the first color resist 110R and the second color resist 110B can be avoided on a white screen.

[0049] like Figure 1 As shown, the color filter array 110 has columns r1 to r6 arranged along a first direction D1 and multiple columns n1 to n3 arranged along a second direction D2. In this embodiment, the first color filter 110R and the second color filter 110B are both continuously arranged in the first diagonal direction D3, and the first color filter 110R and the second color filter 110B are also continuously arranged in the second diagonal direction D4. In other words, adjacent first color filters 110R are located in different columns and different rows, and adjacent second color filters 110B are located in different columns and different rows. The term "continuously" here means that there are no other color filters between two adjacent color filters of the same color. For example, two adjacent second color filters 110B located in different columns (e.g., columns n2 and n3) must be located in adjacent but not row columns (e.g., rows r4 and r5).

[0050] For example, the filter unit U includes six first color resists 110R, six second color resists 110B, and three third color resists 110G. The first color resists 110R located in column n2 and row r1 are arranged adjacent to another first color resist 110R located in column n1 and row r2 along the first diagonal direction D3. The second color resists 110B located in column n2 and row r5 are arranged adjacent to another second color resist 110B located in column n3 and row r6 along the second diagonal direction D4.

[0051] Each first color resistor 110R has two connected sides, and each side is adjacent to two of the second color resistors 110B. For example, the first color resistor 110R located in column n2 and row r1 is adjacent to two second color resistors 110B below and to the left, respectively. Similarly, each second color resistor 110B has two connected sides, and each side is adjacent to two of the first color resistors 110R. For example, the second color resistor 110B located in column n2 and row r5 is adjacent to two first color resistors 110R below and to the right, respectively.

[0052] In this embodiment, the third color resist 110G is also continuously arranged along the first diagonal direction D3, but the third color resist 110G is not continuously arranged along the second diagonal direction D4. Therefore, the first color resist 110R and the second color resist 110B are arranged in an alternating pattern, while the third color resist 110G is only arranged diagonally. In this way, the alternating arrangement of the first color resist 110R and the second color resist 110B reduces the regularity of the color resist arrangement in the color filter layer array 110, further preventing the appearance of striped patterns of the first color resist 110R and the second color resist 110B on a white screen.

[0053] When a black-and-white display screen contains a pattern approximately the size of a subpixel area 102, if this subpixel area 102 corresponds to a large area of ​​color resist in the color filter array 110, the color is likely to be displayed on the screen. Therefore, by shortening the lengths of the first color resist 110R and the second color resist 110B and changing their arrangement, the chances of achieving white balance can be increased, thereby avoiding the problem of color resist color showing through.

[0054] like Figure 1 As shown, in this embodiment, each third color filter 110G has two opposing long sides, and each long side is arranged adjacent to one of the first color filters 110R and one of the second color filters 110B. For example, the filter unit U includes a third color filter 110G located in column n2 and rows r3 to r4, and this third color filter 110G has two long sides. Each of the two long sides of the third color filter 110G is adjacent to one first color filter 110R and one second color filter 110B, and the two first color filters 110R and the two second color filters 110B are arranged alternately. In other words, between any two adjacent third color filters 110G along the second direction D2, there is a 2x2 array formed by the alternating arrangement of two first color filters 110R and two second color filters 110B.

[0055] Figure 3 This is a top view of a color electrophoretic display 100a according to another embodiment of the present disclosure. The color electrophoretic display 100a is substantially the same as the color electrophoretic display 100, except for the arrangement of the first color resist 110R and the second color resist 110B. For example, the filter unit U includes a third color resist 110G located in column n2 and rows r3-r4, and this third color resist 110G has two long sides. Each of the two long sides of the third color resist 110G is adjacent to a first color resist 110R and a second color resist 110B, and the two first color resists 110R and the two second color resists 110B are arranged parallel to each other. In other words, the arrangement of the two-by-two array formed by the alternating arrangement of two first color resists 110R and two second color resists 110B in the color filter layer array 110a is similar to... Figure 1 The arrangement of the embodiments differs. The color electrophoresis display 100a has a similar arrangement to... Figure 1The same technical features as the color electrophoresis display 100 shown will not be repeated here.

[0056] Figure 4A This is a schematic diagram of the distribution of the first and second color resists in a known color electrophoretic display. Figure 4B According to Figure 1 The diagram shows the distribution of the first color filter 110R and the second color filter 110 in the color filter array 110. (See diagram for reference.) Figure 4A As shown, arrow R1 illustrates the distribution of red resist in a known color electrophoresis display, and arrow B1 illustrates the distribution of blue resist. Both arrows R1 and B1 extend along the first diagonal direction D3, resulting in a high degree of regularity in the resist arrangement, which easily leads to striped patterns appearing on a white screen. The red and blue resists are arranged adjacent to each other, making the dark areas more noticeable and easily identifiable on a white screen.

[0057] like Figure 4B As shown, arrow R2 illustrates the distribution of the first color resist 110R in the color filter array 110, and arrow B2 illustrates the distribution of the second color resist 110B in the color filter array 110. Arrows R2 and B2 are distributed along the first diagonal direction D3 and the second diagonal direction D4, and arrows R2 and B2 are relatively short. This reduces the regularity of the color resist arrangement, thus avoiding striped patterns of the first color resist 110R and the second color resist 110B appearing on a white screen.

[0058] In summary, due to the low reflectivity of the first and second color resists, this disclosure avoids the appearance of striped patterns of the first and second color resists on a white screen by making their areas smaller than the area of ​​the third color resist in the color filter layer array. Furthermore, by arranging the first and second color resists alternately, the regularity of the color resist arrangement in the color filter layer array is reduced, further preventing striped patterns from appearing on a white screen. When a black-and-white display screen contains a pattern close to the size of a subpixel, the irregular arrangement of the smaller first and second color resists increases the chance of achieving white balance, thus preventing the color of the color resists from showing through.

[0059] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A color filter layer array, characterized in that, Include: Multiple primary color resists, each having a primary color; Multiple second color resists, each having a second color different from the first color; and Multiple third color resists, each having a third color different from the first color and the second color, wherein the reflectivity of the third color resists is greater than the reflectivity of the first color resists and the second color resists, the first color resists are arranged continuously in a first diagonal direction and a second diagonal direction, wherein the third color resists are arranged continuously in the first diagonal direction and not continuously in the second diagonal direction.

2. The color filter layer array according to claim 1, characterized in that, The second color resists are arranged continuously along the first diagonal direction and the second diagonal direction.

3. The color filter layer array according to claim 1, characterized in that, The area of ​​each of the third color resistors is greater than the area of ​​each of the first color resistors and each of the second color resistors.

4. The color filter layer array according to claim 1, characterized in that, Each of the first color resistors has two connected sides, and the two sides are respectively arranged adjacent to two of the second color resistors.

5. The color filter layer array according to claim 1, characterized in that, Each of the second color resistors has two connected sides, and the two sides are respectively arranged adjacent to two of the first color resistors.

6. A color electrophoresis display, characterized in that, include: A display area contains multiple sub-pixel areas; A pixel array, the position of which corresponds to the display area; A display medium layer is located on the pixel array; as well as The color filter array as claimed in claim 1 has a plurality of rows arranged along a first direction and a plurality of columns arranged along a second direction, wherein the first direction is perpendicular to the second direction, and wherein each of the subpixel regions corresponds to the columns and rows of the color filter array.

7. The color electrophoretic display according to claim 6, characterized in that, Among these first color resistors, adjacent pairs are located in different columns and different rows, and among these second color resistors, adjacent pairs are located in different columns and different rows.

8. The color electrophoretic display according to claim 6, characterized in that, The vertical projection of each of the first color resists corresponds to a single pixel region, and the vertical projection of each of the second color resists corresponds to a single pixel region.

9. The color electrophoretic display according to claim 6, characterized in that, Each of these third color resists has its vertical projection corresponding to two pixel areas.

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