CN206311871U - A kind of display device of electronic paper - Google Patents

Abstract

The utility model relates to an electronic paper display device, comprising: a substrate having a first surface and a second surface oppositely arranged, the first surface is provided with a thin film transistor circuit layer; a touch circuit layer is formed on the On the second surface; the electronic paper film, the electronic paper film includes: a transparent encapsulation protective film layer and an encapsulation protective film layer arranged oppositely, the transparent encapsulation protective film layer is arranged on the circuit layer of the thin film transistor; an electrode layer, It is disposed on the side of the encapsulation protection film layer close to the transparent encapsulation protection film layer; the electronic ink layer is disposed between the transparent encapsulation protection film layer and the electrode layer. The beneficial effects of the utility model are: while achieving integrated touch control, the display performance of the electronic paper can be guaranteed, the thickness of the electronic paper module can be reduced, a good touch function can be achieved, the manufacturing process is relatively easy to operate, and the production cost can be reduced.

Description

An electronic paper display device

technical field

The utility model relates to the field of electronic paper display, in particular to an electronic paper display device.

Background technique

The electronic paper display is to uniformly disperse the dyed charged particles into a medium solution with a certain viscosity, and use the electric field to make the charged particles perform electrophoretic movement to produce color display. Because the displayed color is reflected by the colored particles to reflect external light, the display has the effect of ordinary paper , won the favor of readers. In addition, because electronic paper has a bistable effect, it can display content even if the power is off. Compared with other types of display devices, it has a significant power saving capability. Because of the above advantages, electronic paper display devices are widely used in the fields of e-readers and wireless electronic tags nowadays, and consumers require e-paper display devices that are light and thin, have good display, and sensitive and stable touch functions.

However, the traditional electronic paper display device integrates the touch function by attaching the touch panel on the surface of the electronic paper. Some people also propose to make a TSP (touch) pattern on the surface of the FPL (electronic paper ink film) film to achieve the touch function. The above method Either the thickness of the entire e-paper module cannot be reduced, or the manufacturing process is difficult, the cost is high, and the touch function is poor.

Utility model content

In order to solve the above technical problems, the utility model provides an electronic paper display device,

In order to achieve the above purpose, the technical solution adopted by the utility model is: an electronic paper display device, comprising:

A substrate, having a first surface and a second surface oppositely arranged, and a thin film transistor circuit layer is arranged on the first surface;

a touch circuit layer formed on the second surface;

An electronic paper film, the electronic paper film comprising:

A transparent encapsulation protective film layer and an encapsulation protective film layer disposed opposite to each other, the transparent encapsulation protective film layer is disposed on the thin film transistor circuit layer;

The electrode layer is arranged on the side of the packaging protective film layer close to the transparent packaging protective film layer;

The electronic ink layer is arranged between the transparent packaging protective film layer and the electrode layer. Further, it also includes a first protective film on the touch circuit layer.

Further, the first protective film is an anti-glare film.

Further, the electronic paper film further includes a second protective film disposed on a side of the packaging protective film layer away from the electrode layer.

Further, it also includes a sealant surrounding the electronic paper film, and the sealant is connected between the thin film transistor circuit layer and the second protective film.

Further, the electronic ink layer includes a plurality of microcapsules, and each microcapsule includes a fluid and a plurality of charged particles in the fluid.

Further, the thin film transistor circuit layer includes a first region where the electronic ink layer is arranged and a second region located outside the first region, and the second region is provided with a device for controlling the contact between the thin film transistor circuit layer and the electronic ink layer. The direction of the electric field between the electrode layers is used to control the driving circuit unit of the distribution of the charged particles, the driving circuit unit is electrically connected with the thin film transistor circuit layer and the electrode layer, and the driving circuit unit is connected through the first flexible The circuit board is connected with the control circuit board.

Further, the touch circuit layer is connected to the control circuit board through the second flexible circuit board.

The beneficial effects of the utility model are: while achieving integrated touch control, the display performance of the electronic paper can be guaranteed, the thickness of the electronic paper module can be reduced, a good touch function can be achieved, the manufacturing process is relatively easy to operate, and the production cost can be reduced.

Description of drawings

FIG. 1 shows a schematic structural diagram of an electronic paper display device in an embodiment of the present invention;

Fig. 2 shows the schematic diagram after forming the thin film transistor circuit layer on the substrate in the utility model embodiment;

Fig. 3 shows the schematic diagram after forming the touch circuit layer on the substrate in the embodiment of the utility model;

Fig. 4 shows the schematic diagram after pasting the electronic paper film on the circuit layer of the thin film transistor in the embodiment of the utility model;

Fig. 5 shows a schematic diagram after the first protective film is pasted on the touch circuit layer in the embodiment of the utility model;

Fig. 6 shows a schematic diagram after coating the sealant around the electronic paper film in the embodiment of the utility model;

FIG. 7 shows a schematic diagram of the electronic paper display device in the embodiment of the present invention after manufacturing the driving circuit unit.

detailed description

The features and principles of the utility model will be described in detail below in conjunction with the accompanying drawings. The examples given are only used to explain the utility model, and are not intended to limit the protection scope of the utility model.

As shown in Figures 1-7, this embodiment provides an electronic paper display device, including:

A substrate 1 has a first surface and a second surface oppositely arranged, and a thin film transistor circuit layer 3 is arranged on the first surface;

a touch circuit layer 2 formed on the second surface;

The electronic paper film 100, the electronic paper film 100 includes:

The transparent encapsulation protective film layer 9 and the encapsulation protective film layer 6 arranged oppositely, the transparent encapsulation protective film layer 9 is arranged on the thin film transistor circuit layer 3;

The electrode layer 7 is arranged on the side of the encapsulation protective film layer 6 close to the transparent encapsulation protective film layer 9;

The electronic ink layer 5 is arranged between the transparent packaging protective film layer 9 and the electrode layer 7 .

A connection point is also provided between the electrode layer 7 and the thin film transistor circuit layer 3 so that the electrode layer 7 is electrically connected to the thin film transistor circuit layer 3. Specifically, the electrode layer 7 includes a set of The third area of the electronic ink layer 5, and the fourth area located on one side of the third area, the fourth area is provided with the connection point, as shown in Figure 1, the transparent encapsulation protective film layer 9. The electronic ink layer 5 has the same area, and the transparent packaging protective film layer 9 and the right side of the electronic ink layer 5 are provided with the connection point.

Preferably, the connection points are silver paste points.

The transparent encapsulation protective film layer 9 is arranged between the thin film transistor circuit layer 3 and the electronic ink layer 5, that is, the display surface of the electronic paper film 100 is the side close to the substrate 1, and the display image of the electronic paper film 100 is transparent. The substrate 1 allows users to see from the second surface of the substrate 1 that the encapsulation protective film layer 6 protects the electrode layer 7 .

The encapsulation protective film layer 6 can be transparent; it can also be opaque, so as to improve the contrast of image display.

The electronic paper film 100 is formed on the first surface of the substrate 1, and the touch circuit layer 2 is directly formed on the second surface of the substrate 1, without additional glass substrate 1, and on the premise of reducing the thickness of the electronic paper module, the integrated touch control is achieved. function, and can ensure the display performance of electronic paper, to achieve a good touch function, the touch circuit layer 2 is directly formed on the second surface of the substrate 1, the process is mature, the process is easy to operate, and the production cost is reduced.

In this embodiment, the thin film transistor circuit layer 3 includes a pixel electrode.

In this embodiment, the electronic paper display device further includes a first protective film 13 located on the touch circuit layer 2 to protect the touch circuit layer 2 .

Preferably, the first protective film 13 is an anti-glare film, which protects the touch circuit layer 2 and improves display contrast.

In this embodiment, the electronic paper film 100 further includes a second protective film 8 disposed on the side of the packaging protective film layer away from the electrode layer 7, the second protective film 8 and the packaging protective film layer 6 cooperate to play the role of double protection.

In this embodiment, the electronic paper display device further includes a sealant 4 surrounding the electronic paper film 100, and the sealant 4 is connected between the thin film transistor circuit layer 3 and the second protective film 8 between. The setting of the sealant 4 protects the electronic paper film 100 from water and moisture.

In this embodiment, the electronic ink layer 5 includes a plurality of microcapsules, and each microcapsule includes a fluid and a plurality of charged particles in the fluid.

Further, the thin film transistor circuit layer 3 includes a first area where the electronic ink layer 5 is set and a second area outside the first area, and the second area is provided with a control device for controlling the thin film transistor circuit layer. 3 and the electric field direction between the electrode layer 7 to control the driving circuit unit 10 of the distribution of the charged particles, the driving circuit unit 10 is electrically connected with the thin film transistor circuit layer 3 and the electrode layer 7, and the The drive circuit unit 10 is connected to the control circuit board through the first flexible circuit board 11 .

In this embodiment, the driving circuit unit 10 may be a driving integrated circuit (IC).

Under the control of the control circuit board, the driving circuit unit 10 controls to change the direction of the electric field between the thin film transistor circuit layer 33 and the electrode layer 7 to control the distribution of the charged particles, thereby displaying images.

Further, the touch circuit layer 2 is connected to the control circuit board through the second flexible circuit board 12 . The touch function is realized under the control of the control circuit board.

The manufacturing process steps of the electronic film display device in this embodiment are as follows:

A pattern of a thin film transistor circuit layer 3 is formed on the first surface of the substrate 1, as shown in FIG. 2 ;

Forming a pattern of a touch circuit layer 2 on the second surface of the substrate 1, as shown in FIG. 3 ;

Paste the electronic paper film 100 on the thin film transistor circuit layer 3, as shown in FIG. 4;

Paste a first protective film 13 on the touch circuit layer 2, as shown in FIG. 5;

Coating sealant 4 around the electronic paper film 100, as shown in Figure 6;

Paste an integrated drive circuit element (IC) on the second area other than the first area where the electronic paper film 100 is pasted on the thin film transistor circuit layer 3;

The touch circuit layer 2 is connected to the control circuit board through the first flexible circuit board 12;

The drive circuit unit is connected to the control circuit board through the second flexible circuit board 11 , as shown in FIG. 7 .

In the current implementation of the integrated touch control of the electronic paper film 100, the electronic paper film 100 and the touch circuit layer 2 are sequentially formed on the same surface of the substrate 1, the touch circuit layer 2 is provided with a protective film, and the touch circuit layer 2 is formed on the The side of the electronic paper film 100 away from the substrate 1 or the touch circuit layer 2 is formed on the side of the protective film close to the substrate 1. The distance between the touch circuit layer 2 and the signal wiring and pixel electrodes in the electronic paper display is very close, and the driving signal of the electronic paper display Generally, the voltage signal is very strong, and the touch signal is easily affected by the interference of the electronic paper display signal to affect the touch function, but the utility model does not have this problem; in addition, the current electronic paper film 100 and the protective film are made in large pieces, and then cut It is very difficult to apply a specific touch circuit layer 2 on a large film, but in this embodiment, the touch circuit layer 2 is directly formed on the substrate 1. The manufacturing process is simple and easy to operate.

The electronic paper display device of this embodiment has the following advantages:

1. The electronic paper display device adds a built-in touch function.

2. The electronic paper display device of this embodiment can realize the touch function without adding an additional substrate, which ensures lightness and thinness, and maintains a good touch function.

3. It is beneficial for manufacturers of thin film transistor substrates to integrate the process of thin film transistor substrates and touch circuit layers at the same time, which is beneficial to improve yield, reduce energy consumption, and reduce costs.

The above is a preferred embodiment of the utility model. It should be noted that, for those skilled in the art, some improvements and modifications can be made without departing from the principle of the utility model. These improvements And retouching should also be regarded as the protection scope of the present utility model.

Claims (10)

1. An electronic paper display device, characterized in that, comprising: A substrate, having a first surface and a second surface oppositely arranged, and a thin film transistor circuit layer is arranged on the first surface; a touch circuit layer formed on the second surface; An electronic paper film, the electronic paper film comprising: A transparent encapsulation protective film layer and an encapsulation protective film layer disposed opposite to each other, the transparent encapsulation protective film layer is disposed on the thin film transistor circuit layer; The electrode layer is arranged on the side of the packaging protective film layer close to the transparent packaging protective film layer; The electronic ink layer is arranged between the transparent packaging protective film layer and the electrode layer. 2. The electronic paper display device according to claim 1, further comprising a first protective film on the touch circuit layer. 3. The electronic paper display device according to claim 2, wherein the first protective film is an anti-glare film. 4 . The electronic paper display device according to claim 1 , wherein the electronic paper film further comprises a second protective film disposed on a side of the packaging protective film layer away from the electrode layer. 5. The electronic paper display device according to claim 4, further comprising a sealant surrounding the electronic paper film, and the sealant is connected between the thin film transistor circuit layer and the second film transistor. between the two protective films. 6. The electronic paper display device according to claim 1, wherein the electronic ink layer comprises a plurality of microcapsules, and each microcapsule comprises a fluid and a plurality of charged particles in the fluid. 7. The electronic paper display device according to claim 6, wherein the thin film transistor circuit layer includes a first area where the electronic ink layer is arranged and a second area outside the first area, so The second region is provided with a driving circuit unit for controlling the electric field direction between the thin film transistor circuit layer and the electrode layer to control the distribution of the charged particles, the driving circuit unit is connected with the thin film transistor circuit layer, the The electrode layers are electrically connected, and the driving circuit unit is connected to the control circuit board through the first flexible circuit board. 8. The electronic paper display device according to claim 1, wherein the touch circuit layer is connected to the control circuit board through the second flexible circuit board. 9. The electronic paper display device according to claim 1, wherein a connection for electrically connecting the electrode layer and the thin film transistor circuit layer is also provided between the electrode layer and the thin film transistor circuit layer point. 10. The electronic paper display device according to claim 9, wherein the connecting points are silver paste points.