CN102455561B - color display device - Google Patents

Abstract

A color display device comprises a lower substrate, a driving array, a display layer, a color filter substrate and a transparent substrate. The driving array is arranged on the lower substrate. The display layer is configured on the driving array and comprises a first area and a second area. The color filter substrate is arranged on the display layer and is positioned in the first area. The transparent substrate is configured on the display layer and is positioned in the second area. The color display device has higher light reflectivity, and is beneficial to improving the display quality of the display device.

Description

color display device

technical field

The invention relates to a display device, and in particular to a color display device.

Background technique

Conventional electrophoretic display devices are usually configured with a black and white electrophoretic display layer, so they are black and white display devices. In order to make the electrophoretic display device more competitive in the market, color filters are used in the prior art to make the electrophoretic display device achieve the effect of colorization, so that the electrophoretic display device conforms to the current trend of pursuing colorization of flat-panel display devices. .

A color filter is generally composed of a substrate and a color filter pattern disposed on the substrate. When in use, the color filter is attached to the entire black-and-white electrophoretic display layer, and the color filter patterns (such as red filter patterns, green filter patterns, and blue filter patterns) of the color filter are combined with the black and white color filters. The color combination of the black electrophoretic particles and the white electrophoretic particles in the electrophoretic display layer enables the electrophoretic display device to achieve a color effect. However, the color filter pattern of the color filter is usually made of a color photoresist material, and its absorption of light will lead to light loss, thereby making the light transmittance of the color filter poor. When a color filter is attached above the black and white electrophoretic display layer of the reflective electrophoretic display device, the black and white electrophoretic display layer will be completely covered by the color filter, so that the overall light reflectance of the display device will be affected by the color filter. The light transmittance of the light sheet is poor and low, resulting in poor display quality of the display device.

Contents of the invention

In view of this, the present invention provides a color display device with high light reflectivity, which is beneficial to improve the brightness of color display, and further improve the display quality of the display device.

To achieve the above and other advantages, the present invention provides a color display device, which includes a lower substrate, a driving array, a display layer, a color filter substrate and a transparent substrate. The driving array is configured on the lower substrate. The display layer is configured on the driving array and includes a first area and a second area. The color filter substrate is arranged on the display layer and located in the first area. The transparent substrate is arranged on the display layer and located in the second area.

In other embodiments of the present invention, the color filter substrate includes a transparent bottom plate and a color filter layer, and the color filter layer includes a plurality of color filter photoresists and is disposed between the transparent bottom plate and the display layer.

In other embodiments of the present invention, the above-mentioned transparent bottom plate is a transparent glass or an optical plastic film.

In other embodiments of the present invention, the thickness of the above-mentioned transparent substrate is equal to the sum of the thickness of the color filter layer and the thickness of the transparent bottom plate, and the transparent bottom plate and the transparent substrate are connected as a whole.

In other embodiments of the present invention, the above-mentioned transparent substrate is a transmissive glass or an optical plastic film.

In other embodiments of the present invention, the above display layer is an electrophoretic display layer.

In other embodiments of the present invention, the area ratio of the above-mentioned first region to the second region is between 20% and 80%.

To achieve the above and other advantages, the present invention provides a color display device, which includes a lower substrate, a driving array, a first front plane laminate (FPL), a second front plane and a color filter substrate. The driving array is configured on the lower substrate and includes a third area and a fourth area. The first front board is configured on the driving array and located in the third area. The second front board is configured on the driving array and located in the fourth area. The color filter substrate is arranged on the first front panel.

In other embodiments of the present invention, the above-mentioned color display device further includes a transparent substrate disposed on the second front plate.

In other embodiments of the present invention, the area ratio of the third region to the fourth region is between 20% and 80%.

In the color display device of the present invention, the color filter substrate only covers a part of the display area, so as to achieve the purpose of colorization. For another part of the display area that is not covered by the color filter substrate, it can avoid the loss of the brightness of the reflected light due to the poor light transmittance of the color filter substrate, which is conducive to improving the light reflectivity of the display device and improving the display device. The overall light intensity is beneficial to improve the brightness of the color display, thereby improving the display quality of the display device.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic top view of a color display device according to a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the color display device along line II-II according to the first embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of a color display device according to a second embodiment of the present invention.

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the color display device proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. Details are as follows.

FIG. 1 is a schematic top view of a color display device according to a first embodiment of the present invention. 2 is a schematic cross-sectional view of the color display device along line II-II according to the first embodiment of the present invention. Please refer to FIG. 1 and FIG. 2 together. The color display device 100 of this embodiment includes a lower substrate 110 , a driving array 120 , a display layer 130 , a color filter substrate 140 and a transparent substrate 150 . The driving array 120 is disposed on the lower substrate 110 . The display layer 130 is disposed on the driving array 120 . Both the color filter substrate 140 and the transparent substrate 150 are disposed on the display layer 130 .

The lower substrate 110 is a rigid substrate, such as a glass or metal substrate, but the invention is not limited thereto.

The driving array 120 is disposed on the lower substrate 110 and includes a plurality of thin film transistors 122 arranged in an array. The thin film transistor 122 can be, for example, an amorphous silicon thin film transistor (a-SiTFT), a polysilicon thin film transistor (poly-siliconthinfilm transistor, Poly-SiTFT), a low temperature process thin film transistor (lowtemperaturepoly-siliconthinfilmtransistor, LTPS-TFT), an organic thin film transistor ( Organicthinfilmtransistor, OTFT) or oxide thin film transistor (oxidethinfilmtransistor, oxide-TFT), etc., but not limited thereto.

The display layer 130 is, for example, a black and white electrophoretic display layer, and is disposed on the driving array 120 . Depending on the structure, the display layer 130 can be, for example, a microcapsule electrophoretic display layer or a microcup electrophoretic display layer. This is a technology familiar to those skilled in the art and will not be described in detail here. In this embodiment, the display layer 130 includes a first region 132 and a second region 134 . The first area 132 is adjacent to the second area 134 and covers the entire display area of the display layer 130 , but is not limited thereto. The area ratio of the first region 132 to the second region 134 is between 20% and 80%. It can be understood that the display layer 230 may also be other black and white display layers, such as a black and white liquid crystal display layer.

The color filter substrate 140 is disposed on the first region 132 of the display layer 130 . In this embodiment, the color filter substrate 140 includes a transparent bottom plate 142 and a color filter layer 144 . The transparent bottom plate 142 includes a material with high light transmittance. The transparent bottom plate 142 can be, for example, transparent glass or optical plastic film. Optical plastic films such as polyimide (polyimide, PI), polyethylene terephthalate (polyethyleneterephthalate, PET), polysulfide (polyethersulfone, PES), polyethylene glycol ester (polyethylenenaphthalene, PEN ), polycarbonate (polycarbonate, PC) and other polymer films. The color filter layer 144 is disposed between the transparent bottom plate 142 and the display layer 130 located in the first region 132 . The color filter layer 144 may include a plurality of color filter resists, for example, a plurality of red filter resists 144r, green filter resists 144g and blue filter resists 144b.

The transparent substrate 150 is disposed on the second region 134 of the display layer 130 . The transparent substrate 150 includes a material having high light transmittance. The transparent substrate 150 can be, for example, transmissive glass or optical plastic film. Optical plastic films such as polyimide (polyimide, PI), polyethylene terephthalate (polyethyleneterephthalate, PET), polysulfide (polyethersulfone, PES), polyethylene glycol ester (polyethylenenaphthalene, PEN ), polycarbonate (polycarbonate, PC) and other polymer films. It can be understood that, for the convenience of manufacture, the transparent substrate 150 and the transparent bottom plate 142 can be integrally formed, that is, connected as a whole. In order to better bond the color filter substrate 140 and the transparent substrate 150 to the display layer 130 , preferably, the thickness of the transparent substrate 150 is equal to the sum of the thickness of the color filter layer 144 and the thickness of the transparent bottom plate 142 .

Continuing from the above, in the color display device 100 , the color filter substrate 140 only covers the first region 132 of the display layer 130 , while the second region 134 of the display layer 130 is not covered by the color filter substrate 140 . In this way, the colorized display of the first region 132 of the display layer 130 can be realized by the color filter substrate 140 , while the second region 134 of the display layer 130 is still displayed in black and white because the color filter substrate 140 is not provided. At the same time, the light passing through the second region 134 will directly pass through the transparent substrate 150 to reach the display layer 130 without causing a large light loss, which is conducive to improving the light reflectance of the color display device 100, so as to improve the color display device 100. The overall light intensity is beneficial to improve the color display brightness of the first region 132 of the display layer 130 , thereby improving the display quality of the color display device 100 .

FIG. 3 is a schematic cross-sectional view of a color display device according to a second embodiment of the present invention. The difference between the color display device 100a of this embodiment and the color display device 100 of the first embodiment lies in the configuration of the display layer. Specifically, referring to FIG. 3 , the color display device 100 a of this embodiment includes a lower substrate 110 , a driving array 120 , a first front plane laminate 232 (frontplane laminate, FPL), a second front plane 234 and a color filter substrate 140 . The driving array 120 is disposed on the lower substrate 110 . The first front board 232 and the second front board 234 are disposed on the driving array 120 . The color filter substrate 140 is disposed on the first front panel 140 .

In this embodiment, the driving array 120 has a third area 124 and a fourth area 126 . In this embodiment, the third area 124 is adjacent to the fourth area 126 and constitutes the entire display area of the color display device 100a, but it is not limited thereto. The area ratio of the third region 124 to the fourth region 126 is between 20% and 80%.

The structures of the first front plate 232 and the second front plate 234 respectively include an electrophoretic layer (not shown) and a transparent electrode layer (not shown) disposed on the electrophoretic layer, which is a technology familiar to those of ordinary skill in the art. This will not be described in detail. In this embodiment, the electrophoretic layer is, for example, a black and white electrophoretic layer. The first front board 232 is disposed on the driving array 120 and located in the third area 124 . The second front board 234 is also disposed on the driving array 120 and located in the fourth area 126 .

In the color display device 100 a , the color filter substrate 140 only covers the first front plate 232 , and the color filter layer 144 is disposed between the transparent bottom plate 142 and the first front plate 232 . The second front panel 234 is not covered by the color filter substrate 140 . In this way, the color display of the first front panel 232 can be realized by the color filter substrate 140 , while the second front panel 234 is still displayed in black and white because no color filter substrate is provided. At the same time, the light will directly reach the second front plate 234 without passing through the color filter substrate 140, so there will be no large light loss, which is conducive to improving the light reflectivity of the color display device 100 to improve the color display device 100. The overall light intensity is beneficial to improve the color display brightness of the first front panel 232 , thereby improving the display quality of the color display device 100 .

In addition, in this embodiment, the color display device 100 a further includes a transparent substrate 150 disposed on the second front panel 234 to protect the second front panel 234 . The light will directly pass through the transparent substrate 150 to reach the second front plate 234 without large light loss, which is also beneficial to improve the light reflectivity of the color display device 100 , thereby improving the display quality of the color display device 100 .

It can be understood that the number of the first front plate 232 and the second front plate 234 corresponds to the number of the third area 124 and the fourth area 126 defined by the driving array 120 . In other words, the number of front boards for setting and driving the array 120 is not limited to the first front board 232 and the second front board 234 in this embodiment, and the color display device 100a may include more front boards correspondingly arranged on Drive the entire column 120.

To sum up, in the color display device of the present invention, the color filter substrate only covers a part of the display area, so as to achieve the purpose of colorization. For another part of the display area that is not covered by the color filter substrate, the light will not pass through the color filter substrate, and there will be no light loss due to the poor light transmittance of the color filter substrate, which is conducive to improving the light intensity of the display device. The reflectivity is used to increase the overall light intensity of the display device, which is beneficial to improve the brightness of the color display, thereby improving the display quality of the display device.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the technical content disclosed above to make some changes or modify them into equivalent embodiments with equivalent changes, but as long as they do not depart from the technical solution of the present invention, the Technical Essence Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (7)

1. a colour display device, comprising:

An infrabasal plate;

One drives array, is configured on this infrabasal plate;

A display layer, be configured on this driving array, and there is a first area and a second area, wherein this first area and this second area adjacent, this first area and this second area contain the viewing area of whole display layer, and this second area is positioned at the side of this first area, this second area only have a side and this first area adjacent;

A colored optical filtering substrates, is configured on this display layer, and is positioned at this first area, and this colored optical filtering substrates comprises:

A dianegative; And

A chromatic filter layer, comprise multiple colorized optical filtering photoresistance, be arranged between this dianegative and this display layer, those colorized optical filtering photoresistances comprise blue filter photoresistance, red filter photoresistance and green filter photoresistance, show for colorize to make this first area, this second area is not covered by this colored optical filtering substrates, to make this second area for white and black displays; And

A transparency carrier, is configured on this display layer, and is positioned at this second area;

Wherein the thickness of this transparency carrier equals the thickness of this chromatic filter layer and the thickness sum of dianegative, and this dianegative is connected as a whole with this transparency carrier.

2. colour display device as claimed in claim 1, this dianegative is penetration glass or optics plastic film.

3. colour display device as claimed in claim 1, wherein this display layer is electrophoretic display layer.

4. colour display device as claimed in claim 1, wherein the area ratio of this first area and this second area is between 20% to 80%.

5. a colour display device, comprising:

An infrabasal plate;

One drives array, is configured on this infrabasal plate, and comprises a first area and a second area;

First header board, is configured on this driving array, and is positioned at this first area; And

Second header board, is configured on this driving array, and is positioned at this second area, and wherein this first header board is independent of one another with this second header board; And

A colored optical filtering substrates, is configured on this first header board, and wherein the chromatic filter layer of this colored optical filtering substrates only covers this first header board of being positioned at this first area and exposes this second header board being positioned at this second area.

6. colour display device as claimed in claim 5, more comprises a transparency carrier, is arranged on this second header board.

7. colour display device as claimed in claim 5, wherein the area ratio of this first area and this second area is between 20% to 80%.