A filter film and color electronic paper

Abstract

The present application belongs to the technical field of electronic paper, and discloses a filter film and color electronic paper, wherein the filter film includes a blue pixel filter area distributed in an array, a red pixel filter area distributed in an array, and a green pixel filter area distributed in an array, and also includes a colorless light-transmitting area distributed in an array; the color electronic paper includes the filter film; thereby, the brightness of the color electronic paper can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic paper, and in particular to a filter film and color electronic paper. Background Art

[0002] Some existing color electronic papers mainly include a TFT (Thin Film Transistor) driving backplane, an electronic ink layer and a color filter film stacked in sequence from bottom to top. The color filter film is provided with a blue filter area, a red filter area and a green filter area distributed in an array. Each filter area is arranged opposite to a pixel point of the electronic ink layer. The TFT driving backplane adjusts the grayscale of each pixel point in the electronic ink layer by adjusting the pixel electrode voltage of each pixel point of the electronic ink layer. When external light passes through the color filter film to illuminate the electronic ink layer and is reflected by the electronic ink layer, different colors can be displayed after filtering through the corresponding filter area; for example, when the grayscale of the pixel points corresponding to all the red filter areas and the green filter areas in the electronic ink layer is adjusted to the lowest (corresponding to black), and the grayscale of the pixel points corresponding to all the blue filter areas is adjusted to the highest (corresponding to white), the color electronic paper is displayed as blue after filtering.

[0003] Since color electronic paper does not have its own light source, it mainly relies on reflecting external light to achieve display, and the color filter film will filter out some of the light, resulting in low brightness of the color electronic paper. Utility Model Content

[0004] The purpose of the present application is to provide a filter film and color electronic paper, which can improve the brightness of the color electronic paper.

[0005] In a first aspect, the present application provides a filter film, comprising blue pixel filter regions distributed in an array, red pixel filter regions distributed in an array, and green pixel filter regions distributed in an array, and also comprising colorless light-transmitting regions distributed in an array.

[0006] By setting a colorless light-transmitting area, the light irradiated on the colorless light-transmitting area will not be filtered, which can reduce the filtering effect of the filter film on external light and increase the amount of light passing through. When the filter film is used as a filter layer of color electronic paper, the brightness of the color electronic paper can be improved.

[0007] Optionally, the colorless light-transmitting area is a transparent area.

[0008] Optionally, the colorless light-transmitting area is a hollow area.

[0009] Preferably, the blue pixel filter area, the red pixel filter area, the green pixel filter area and the colorless light-transmitting area constitute a plurality of filter units arranged in an array, and each of the filter units includes one blue pixel filter area, one red pixel filter area, one green pixel filter area and one colorless light-transmitting area.

[0010] Thereby, the distribution uniformity of the colorless light-transmitting area and the color pixel filter areas can be improved, and the brightness of each part of the filter film can be uniform.

[0011] Preferably, in each of the filter units, the blue pixel filter area, the red pixel filter area, the green pixel filter area and the colorless light-transmitting area are arranged in a 2*2 matrix, a single column or a single row.

[0012] Preferably, at least one colorless light-transmitting opening is disposed inside each of the blue pixel filter region, the red pixel filter region and the green pixel filter region.

[0013] This can further increase the brightness.

[0014] Optionally, the colorless light-transmitting port is a transparent window.

[0015] Optionally, the colorless light-transmitting opening is a hollow hole.

[0016] Preferably, annular transparent bands are provided at the edges of the blue pixel filter area, the red pixel filter area and the green pixel filter area.

[0017] This can further increase the brightness.

[0018] In a second aspect, the present application provides a color electronic paper, comprising the filter film described above.

[0019] Beneficial effects: The filter film and color electronic paper provided by the present application, by setting a colorless light-transmitting area, the light irradiated on the colorless light-transmitting area will not be filtered, the filtering effect of the filter film on external light can be reduced, and the amount of light transmitted can be increased. When the filter film is used as a filter layer of color electronic paper, the brightness of the color electronic paper can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of the filter film provided in an embodiment of the present application.

[0021] Figure 2 It is a schematic diagram of an exemplary colorless light-transmitting port and annular transparent zone.

[0022] Figure 3 It is a schematic diagram of another exemplary colorless light-transmitting port and annular transparent zone.

[0023] Figure 4 A schematic diagram of the structure of the color electronic paper provided in an embodiment of the present application.

[0024] Explanation of reference numerals: 100, filter film; 200, electronic ink layer; 300, TFT driving backplane; 1, blue pixel filter area; 2, red pixel filter area; 3, green pixel filter area; 4, colorless light-transmitting area; 5, colorless light-transmitting port; 6, annular transparent band. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0026] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] Please refer to Figure 1-Figure 3 In some embodiments of the present application, a filter film 100 includes a blue pixel filter area 1 distributed in an array, a red pixel filter area 2 distributed in an array, and a green pixel filter area 3 distributed in an array, and also includes a colorless light-transmitting area 4 distributed in an array.

[0028] By setting the colorless light-transmitting area 4, the light irradiated on the colorless light-transmitting area 4 will not be filtered, which can reduce the filtering effect of the filter film 100 on external light and increase the amount of light passing through. When the filter film 100 is used as a filter layer of color electronic paper, the brightness of the color electronic paper can be improved.

[0029] The colorless light-transmitting area 4 may be a transparent area or a hollow area.

[0030] Among them, the specific positions of the blue pixel filter area 1, the red pixel filter area 2 and the green pixel filter area 3 are set according to the pixel distribution positions of the color electronic paper. When the filter film 100 is used as a filter layer of the color electronic paper, each blue pixel filter area 1, each red pixel filter area 2 and each green pixel filter area 3 is opposite to a pixel point.

[0031] In some possible implementations, see Figure 1 , the blue pixel filter area 1, the red pixel filter area 2, the green pixel filter area 3 and the colorless light-transmitting area 4 form a plurality of filter units arranged in an array, and each filter unit includes a blue pixel filter area 1, a red pixel filter area 2, a green pixel filter area 3 and a colorless light-transmitting area 4. Thus, the distribution uniformity of the colorless light-transmitting area 4 and each color pixel filter area can be improved, so that the brightness of each part of the filter film 100 is uniform.

[0032] In each filter unit, the specific arrangement of the blue pixel filter area 1, the red pixel filter area 2, the green pixel filter area 3 and the colorless light-transmitting area 4 can be set according to actual needs. For example, in each filter unit, the blue pixel filter area 1, the red pixel filter area 2, the green pixel filter area 3 and the colorless light-transmitting area 4 are arranged in a 2*2 matrix (e.g. Figure 1 As shown), arranged in a single column or a single row; but not limited to this.

[0033] The specific shapes of the blue pixel filter area 1, the red pixel filter area 2, the green pixel filter area 3 and the colorless light-transmitting area 4 can be set according to actual needs, for example Figure 1 In the figure, the blue pixel filter area 1, the red pixel filter area 2, the green pixel filter area 3 and the colorless light-transmitting area 4 are all square, but not limited thereto.

[0034] In some preferred embodiments, see Figure 2 , Figure 3 At least one colorless light-transmitting opening 5 is disposed inside each of the blue pixel filter region 1, the red pixel filter region 2, and the green pixel filter region 3. Figure 2 , Figure 3 The outer frame in the figure is the edge of a single pixel filter area (blue pixel filter area 1, red pixel filter area 2 or green pixel filter area 3), and the area filled with color is the filter area of ​​the pixel filter area. When external light irradiates the pixel filter area, part of the light is filtered by the filter area to display the corresponding color, and part of the light directly passes through the colorless light transmission port 5 to further increase the brightness.

[0035] The colorless light-transmitting opening 5 is a transparent window or a hollow hole.

[0036] The shape and number of the colorless light-transmitting openings 5 ​​can be set according to actual needs. Figure 2 , Figure 3 In the figure, the colorless light-transmitting openings 5 ​​are all rectangular, and three colorless light-transmitting openings 5 ​​are provided, and the three colorless light-transmitting openings 5 ​​are parallel to each other, but the present invention is not limited thereto.

[0037] When the colorless light-transmitting opening 5 is rectangular and the blue pixel filter area 1, the red pixel filter area 2 and the green pixel filter area 3 are all square, the colorless light-transmitting opening 5 can be arranged parallel to one of the side lines of the corresponding pixel filter area (e.g. Figure 2 ), or can be arranged parallel to one of the diagonals of the corresponding pixel filter area (as shown in Figure 3 ), but not limited thereto.

[0038] In some preferred embodiments, see Figure 2 , Figure 3 , an annular transparent band 6 is provided at the edges of the blue pixel filter area 1, the red pixel filter area 2 and the green pixel filter area 3. When light is irradiated on the pixel filter area, the light can directly pass through the annular transparent band 6, thereby further improving the brightness.

[0039] refer to Figure 4 The present application provides a color electronic paper, including the filter film 100 described above.

[0040] Specifically, the color electronic paper includes a TFT driving backplane 300, an electronic ink layer 200 and a filter film 100 stacked in sequence from bottom to top, wherein the TFT driving backplane 300 and the electronic ink layer 200 are prior arts and will not be described in detail herein.

[0041] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0042] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A filter film, comprising a blue pixel filter region (1) distributed in an array, a red pixel filter region (2) distributed in an array, and a green pixel filter region (3) distributed in an array, characterized in that: It also includes colorless light-transmitting areas (4) distributed in an array; The blue pixel filter area (1), the red pixel filter area (2), the green pixel filter area (3) and the colorless light-transmitting area (4) form a plurality of filter units arranged in an array, each of the filter units comprising one blue pixel filter area (1), one red pixel filter area (2), one green pixel filter area (3) and one colorless light-transmitting area (4); At least one colorless light-transmitting opening (5) is provided inside each of the blue pixel light-filtering area (1), the red pixel light-filtering area (2) and the green pixel light-filtering area (3); Annular transparent bands (6) are provided at the edges of the blue pixel filter area (1), the red pixel filter area (2) and the green pixel filter area (3).

2. The filter film according to claim 1, characterized in that: The colorless light-transmitting area (4) is a transparent area.

3. The filter film according to claim 1, characterized in that: The colorless light-transmitting area (4) is a hollow area.

4. The filter film according to claim 1, characterized in that: In each of the filter units, the blue pixel filter area (1), the red pixel filter area (2), the green pixel filter area (3) and the colorless light-transmitting area (4) are arranged in a 2*2 matrix, a single column or a single row.

5. The filter film according to claim 1, characterized in that: The colorless light-transmitting opening (5) is a transparent window.

6. The filter film according to claim 1, characterized in that: The colorless light-transmitting opening (5) is a hollow hole.

7. A color electronic paper, characterized in that: The filter film (100) comprises any one of claims 1 to 6.

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