Electronic paper display panel

Abstract

The invention provides an electronic paper display panel. The electronic paper display panel comprises an electronic ink display layer, a first substrate, a pixel array layer, a common electrode layer and a driving circuit, the first substrate is disposed on a first side of the electronic ink display layer. The pixel array layer is disposed between the first substrate and the electronic ink display layer, and includes a plurality of touch electrodes and a plurality of driving pixels arranged in an array. Each of the driving pixels includes a pixel first electrode and a pixel second electrode. The touch electrodes, the first pixel electrodes and the second pixel electrodes are overlapped with one another. The common electrode layer is arranged on the second side of the electronic ink display layer. The first side is opposite to the second side. The driving circuit is in signal communication with the common electrode layer and the pixel array layer, wherein the touch electrodes are in signal communication with the driving circuit individually.

Description

Technical Field

[0001] The present invention relates to a display panel, and in particular to an electronic paper display panel. Background Art

[0002] Electronic paper display panels can be widely used in various display products due to their thinness, low energy consumption and other characteristics. With the development of various technologies, products with multiple functions have become an important research and development direction. For example, electronic paper display panels can be integrated with touch panels to achieve a design that combines touch and display. Summary of the invention

[0003] The present invention is directed to an electronic paper display panel having both display and touch functions.

[0004] According to an embodiment of the present invention, an electronic paper display panel includes an electronic ink display layer, a first substrate, a pixel array layer, a common electrode layer and a driving circuit. The first substrate is configured on a first side of the electronic ink display layer. The pixel array layer is configured between the first substrate and the electronic ink display layer, and includes a plurality of touch electrodes and a plurality of driving pixels arranged in an array. Each driving pixel includes a first pixel electrode and a second pixel electrode. The touch electrode, the first pixel electrode and the second pixel electrode overlap each other. The common electrode layer is configured on a second side of the electronic ink display layer. The first side is opposite to the second side. The driving circuit signal is connected to the common electrode layer and the pixel array layer, wherein the touch electrodes are individually connected to the driving circuit.

[0005] In the electronic paper display panel according to an embodiment of the present invention, the touch electrode includes N capacitor electrodes, each of the N capacitor electrodes is located in one of the driving pixels and overlaps the corresponding pixel first electrode and the corresponding pixel second electrode, and N is greater than 1 and does not exceed the number of driving pixels.

[0006] In the electronic paper display panel according to an embodiment of the present invention, each of the touch electrodes extends along a first direction, and the touch electrodes are arranged in parallel along a second direction, wherein the first direction intersects the second direction. The common electrode layer includes a plurality of common electrodes, each of the common electrodes extends along the second direction, and the common electrodes are arranged in parallel along the first direction.

[0007] In the electronic paper display panel according to the embodiment of the present invention, the touch electrodes are arranged in an array.

[0008] In the electronic paper display panel according to the embodiment of the present invention, the electronic paper display panel further comprises a second substrate disposed opposite to the first substrate, and the common electrode layer is located between the second substrate and the electronic ink display layer and directly contacts the electronic ink display layer.

[0009] In the electronic paper display panel according to the embodiment of the present invention, the driving circuit is adapted to alternately execute a signal providing mode and a signal reading mode on the touch electrodes.

[0010] In the electronic paper display panel according to the embodiment of the present invention, the common electrode layer includes a plurality of common electrodes, and the common electrodes are arranged in an array to define independent touch sensing areas.

[0011] In the electronic paper display panel according to the embodiment of the present invention, each of the driving pixels further comprises an active element. The active element comprises a gate, a source and a drain, and the first pixel electrode and the second pixel electrode are both connected to the drain.

[0012] In the electronic paper display panel according to the embodiment of the present invention, the first pixel electrode includes two pixel electrode sub-layers made of different materials.

[0013] In the electronic paper display panel according to the embodiment of the present invention, each of the touch electrodes includes a plurality of capacitor electrodes and a plurality of connecting segments. The connecting segments connect the capacitor electrodes together, and each of the capacitor electrodes is located in one of the driving pixels.

[0014] Based on the above, the electronic paper display panel of the embodiment of the present invention uses existing components to provide a touch function. Therefore, the electronic paper display panel can achieve dual functions of touch and display in a light and thin volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of an electronic paper display panel according to an embodiment of the present invention;

[0016] Figure 2 is a top view schematically showing a pixel array layer according to an embodiment of the present invention;

[0017] Figure 3 Presented Figure 2 A schematic top view of a touch electrode in FIG.

[0018] Figure 4 is a partial cross-sectional schematic diagram of an electronic paper display panel according to an embodiment of the present invention;

[0019] Figure 5 is a top view schematic diagram of a touch electrode in an electronic paper display panel according to an embodiment of the present invention;

[0020] Figure 6 A top view schematically shows a common electrode layer in an electronic paper display panel according to an embodiment of the present invention;

[0021] Figure 7 is a schematic diagram of an electronic paper display panel according to an embodiment of the present invention;

[0022] Figure 8FIG. 4 is a partial schematic diagram of a driving circuit of an electronic paper display panel according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0024] Figure 1 Schematic diagram of an electronic paper display panel according to an embodiment of the present invention. The electronic paper display panel 100 includes a first substrate 110, an electronic ink display layer 120, a common electrode layer 130, a pixel array layer 140, a driving circuit 150 and a second substrate 160. In order to facilitate the presentation of individual components, Figure 1 The electronic ink display layer 120, the common electrode layer 130, the pixel array layer 140 and the driving circuit 150 are represented by simplified circuit symbols and simplified graphics. Figure 1 It is not used to present the specific structure of individual components. The first substrate 110 and the second substrate 160 can have sufficient support, and can also be selectively more flexible. The material of the first substrate 110 and the second substrate 160 may include glass, plastic and other materials that can be applied to substrates in the art. In addition, the first substrate 110 and the second substrate 160 are two stacked plate-like components, and the electronic ink display layer 120, the common electrode layer 130 and the pixel array layer 140 can be arranged between the first substrate 110 and the second substrate 160. The edges of the first substrate 110 and the second substrate 160 can be aligned with each other or not, but Figure 1 The same edges are marked simultaneously to simplify the contents of the drawings.

[0025] The electronic ink display layer 120 is Figure 1 The electronic ink display layer 120 may include an electronic paper display material encapsulated in the form of a capsule or a microcup. For example, the electronic paper display material may include an electrophoretic display material, an electrowetting display material, or other materials with similar functions. The electronic ink display layer 120 may be a prefabricated independent film layer, and is disposed on the first substrate 110 by attachment. In some embodiments, the first substrate 110 is disposed on a first side of the electronic ink display layer 120, and the second substrate 160 is disposed on a second side of the electronic ink display layer 120, and the first side is opposite to the second side.

[0026] The common electrode layer 130 is an electrode layer disposed on the second side of the electronic ink display layer 120. The common electrode layer 130 is substantially located between the second substrate 160 and the electronic ink display layer 120. In some embodiments, the second side of the electronic ink display layer 120 is a side adjacent to the user for presenting a display screen. The common electrode layer 130 may include a transparent conductive layer. In some embodiments, the common electrode layer 130 may include a carrier layer and a transparent conductive layer disposed on the carrier layer, and the common electrode layer 130 may be disposed on the second side of the electronic ink display layer 120 by attaching.

[0027] The pixel array layer 140 is disposed between the first substrate 110 and the electronic ink display layer 120. The pixel array layer 140 includes a plurality of touch electrodes 142 and a plurality of driving pixels 144 arranged in an array. Each of the driving pixels 144 includes a first pixel electrode PE1 and a second pixel electrode PE2, and the touch electrode 142, the first pixel electrode PE1 and the second pixel electrode PE2 overlap each other. The first pixel electrode PE1 and the second pixel electrode PE2 can be electrically connected to each other and have the same potential when the electronic paper display panel 100 is in operation. Figure 1 The electrical connection relationship between the touch electrode 142 , the first pixel electrode PE1 and the second pixel electrode PE2 is only schematically presented, but the stacking order between these electrodes is not limited. The second pixel electrode PE2 can be used as a storage capacitor electrode for driving the pixel 144 .

[0028] In some embodiments, each of the driving pixels 144 further includes an active device TFT, and the pixel array layer 140 further includes a plurality of scan lines 146 and a plurality of data lines 148. The active device TFT of each of the driving pixels 144 can be electrically connected to one of the scan lines 146 and one of the data lines 148. The active device TFT includes a gate GE, a source SE, and a drain DE. The gate GE is connected to the corresponding scan line 146, the source SE is connected to the corresponding data line 148, and the drain DE is connected to the corresponding pixel first electrode PE1 and the pixel second electrode PE2.

[0029] In addition, the touch electrode 142 includes N capacitor electrodes CE, each of the N capacitor electrodes CE is located in one of the driving pixels 144 and overlaps the corresponding pixel first electrode PE1 and the corresponding pixel second electrode PE2, wherein N is greater than 1 and does not exceed the number of the driving pixels 144. In other words, each of the touch electrodes 142 is formed by connecting the capacitor electrodes CE of N driving pixels 144. Figure 1 In terms of Figure 116 driving pixels 144 and 2 touch electrodes 142 in a 4×4 array are presented, and each touch electrode 142 is composed of the capacitor electrodes CE of 8 driving pixels 144 in a 2×4 array (that is, N is 8). In other embodiments, the touch electrode 142 can be formed by connecting other numbers of capacitor electrodes CE, not limited to the capacitor electrodes CE in a 2×4 array. For example, the designer can determine the size of the touch electrode 142 according to the resolution required by the touch function.

[0030] In this embodiment, the driving circuit 150 can communicate signals to the common electrode layer 130 and the pixel array layer 140. Specifically, the driving pixels 144 in the pixel array layer 140 can be individually connected to the driving circuit 150, and the touch electrodes 142 can also be individually connected to the driving circuit 150 so that the driving pixels 144 and the touch electrodes 142 can operate independently. In some embodiments, a plurality of touch electrodes 142 can be arranged in an array, and each touch electrode 142 can define an independent touch sensing area to achieve a sensing function. The independent touch sensing area defined by each touch electrode 142 can allow a user to perform a single-point pressing operation, but is not limited thereto.

[0031] In some embodiments, after the driving pixel 144 and the common electrode layer 130 receive the display signal individually, the electric field between the first pixel electrode PE1 and the common electrode layer 130 can drive the electronic ink display layer 120 in the corresponding driving pixel 144 to present a specified brightness, thereby realizing the display function. At the same time, the driving circuit 150 can alternately execute the signal providing mode and the signal reading mode for the touch electrode 142. In the signal providing mode, the driving circuit 150 provides a signal to the touch electrode 142, and each capacitor electrode CE of the touch electrode 142 can generate a capacitive effect with the corresponding pixel electrode (including the first pixel electrode PE1 and the second pixel electrode PE2), and provide a storage capacitor for stabilizing the display state. In the signal reading mode, the driving circuit 150 can receive the signal on the touch electrode 142, and determine whether the received signal is floating for touch sensing.

[0032] For example, when there is no touch action, the coupling effect on the touch electrode 142 is substantially stable, so the signal on the touch electrode 142 received by the driving circuit 150 is substantially constant. When a touch action occurs, for example, a user approaches or touches a specific position of the electronic paper display panel 100 with a finger, a conductive object, or a capacitive stylus, the touch electrode 142 at the corresponding position will produce an obvious signal change due to the coupling effect of the touch object, so the obvious signal change on the touch electrode 142 received by the driving circuit 150 can determine that a touch has occurred.

[0033] Figure 2FIG. 4 is a top view schematically showing a pixel array layer according to an embodiment of the present invention. Figure 2 The component symbols used are roughly the same Figure 1 Component symbols are used to indicate the same components. Figure 2 It is used to represent the possible outlines of individual elements in the pixel array layer in the top view, and is not used to limit the specific structure of these elements. Figure 3 Presented Figure 2 A top view of the touch electrodes in FIG. Figure 2 and Figure 3 In FIG. 1 , the pixel array structure 140A includes a touch electrode 142A, a driving pixel 144A, a scan line 146, and a data line 148. The connection relationship between the touch electrode 142A, the driving pixel 144A, the scan line 146, and the data line 148 can be referred to as Figure 1 14, and the touch electrodes 142, the driving pixels 144, the scan lines 146, and the data lines 148 are shown in FIG.

[0034] exist Figure 2 In the embodiment, the scan line 146 extends along a first direction D1 and the data line 148 extends along a second direction D2, and the first direction D1 intersects with the second direction D2. The driving pixel 144A can be arranged in a grid formed by the intersection of the scan line 146 and the data line 148. The active element TFT can be located near the intersection of the scan line 146 and the data line 148 to connect to the corresponding scan line 146 and the data line 148. The touch electrode 142 includes a plurality of capacitor electrodes CE and each capacitor electrode CE can overlap the corresponding pixel first electrode PE1 and pixel second electrode PE2.

[0035] In addition, if Figure 2 and Figure 3 As shown, the touch electrode 142A further includes a plurality of first connection segments CC1 and a plurality of second connection segments CC2. The first connection segment CC1 connects a plurality of capacitor electrodes CE together along a first direction D1, and the second connection segment CC2 connects a plurality of capacitor electrodes CE together along a second direction D2 to form the touch electrode 142A. In some embodiments, the second connection segment CC2 and the capacitor electrode CE may be the same film layer, and the first connection segment CC1 and the capacitor electrode CE may be different film layers, but not limited thereto. In some embodiments, the scan line 146 and the second connection segment CC2 may be different film layers to allow the second connection segment CC2 to cross the scan line 146 without short-circuiting with the scan line 146. Similarly, the data line 148 and the first connection segment CC1 may be different film layers to allow the first connection segment CC1 to cross the data line 148 without short-circuiting with the data line 148.

[0036] Figure 4 FIG. 1 is a partial cross-sectional schematic diagram of an electronic paper display panel according to an embodiment of the present invention. Figure 1The component symbols used are roughly the same Figure 1 , and are used to indicate the same components. Figure 4 It is used to represent the possible stacking order of individual components in the electronic paper display panel in the cross-sectional view, but is not limited to this. Figure 4 The electronic paper display panel 100A includes a first substrate 110A, a second substrate 160A, an electronic ink display layer 120A, a common electrode layer 130A and a pixel array layer 140B. Specifically, the electronic paper display panel 100A may also include Figure 1 The driving circuit 150 shown, but Figure 4 For the convenience of explanation, the driving circuit 150 is omitted. The connection relationship and signal transmission relationship between the electronic ink display layer 120A, the common electrode layer 130A and the pixel array layer 140B can be referred to. Figure 1 Therefore, the electronic ink display layer 120, the common electrode layer 130 and the pixel array layer 140 are described in detail. Figure 4 It is mainly used to illustrate possible implementations of the stacking configuration of the electronic ink display layer 120A, the common electrode layer 130A and the pixel array layer 140B.

[0037] like Figure 4 As shown, the electronic ink display layer 120A is disposed between the first substrate 110A and the second substrate 160A, and the first substrate 110A and the second substrate 160A are respectively located on the first side S1 and the second side S2 of the electronic ink display layer 120A, wherein the first side S1 is opposite to the second side S2. The common electrode layer 130A is disposed between the second substrate 160A and the electronic ink display layer 120A, and is specifically located on the second side S2 of the electronic ink display layer 120A. The pixel array layer 140B is disposed between the first substrate 110A and the electronic ink display layer 120A, and is specifically located on the first side S1 of the electronic ink display layer 120A.

[0038] The pixel array layer 140B includes a touch electrode 142B and a driving pixel 144B. The number of the touch electrode 142B and the number of the driving pixel 144B are multiple. Figure 4 For the convenience of explanation, only a single driving pixel 144B and the corresponding touch electrode 142B are presented. Each driving pixel 144A includes an active device TFT, a first pixel electrode PE1 and a second pixel electrode PE2. The active device TFT includes a semiconductor layer AS, a gate GE, a source electrode SE and a drain electrode DE. The semiconductor layer AS is located between the source electrode SE and the drain electrode DE and contacts the source electrode SE and the drain electrode DE. The gate GE is connected to the corresponding scan line (such as Figure 1 The source electrode SE is connected to the corresponding data line (such as Figure 1The drain electrode DE is connected to the corresponding first pixel electrode PE1 and second pixel electrode PE2. Here, the first pixel electrode PE1 may include two pixel electrode sub-layers PE1A and PE1B made of different materials, but the present invention is not limited thereto.

[0039] like Figure 4 As shown, the touch electrode 142B is located between the first pixel electrode PE1 and the second pixel electrode PE2 to serve as a capacitor electrode for driving the pixel 144B (eg, Figure 1 Therefore, in addition to providing a touch sensing function, the touch electrode 142B can also provide a storage capacitor during the display period to stabilize the display quality of the electronic paper display panel 100A.

[0040] Figure 4 In the embodiment, the pixel array layer 140B may be composed of multiple patterned conductive layers, multiple insulating layers, and one or more semiconductor layers. For example, the gate GE and the second pixel electrode PE2 may be composed of the first conductive layer; the source SE, the drain DE, and the touch electrode 142B may be composed of the second conductive layer; the pixel electrode sublayer PE1A of the first pixel electrode PE1 may be composed of the third conductive layer; and the pixel electrode sublayer PE1B of the first pixel electrode PE1 may be composed of the fourth conductive layer. At least one insulating layer may be disposed between the first conductive layer, the second conductive layer, and the third conductive layer. For example, a first insulating layer I1 is disposed between the first conductive layer and the second conductive layer, and a second insulating layer I2 and a third insulating layer I3 are disposed between the second conductive layer and the third conductive layer, but the invention is not limited thereto. In addition, the first pixel electrode PE1 may extend into the through hole V1 penetrating the second insulating layer I2 and the third insulating layer I3 to connect to the drain DE, and the second pixel electrode PE2 may be connected to the drain DE through the connecting electrode CT, and the connecting electrode CT penetrates the first insulating layer I1. Thus, the first pixel electrode PE1 and the second pixel electrode PE2 are both connected to the drain electrode DE, so that the first pixel electrode PE1 and the second pixel electrode PE2 are electrically connected to each other. In this embodiment, the third insulating layer I3 may have a relatively large thickness to serve as a planar layer.

[0041] The materials of the first insulating layer I1, the second insulating layer I2 and the third insulating layer I3 can be selected from inorganic insulating materials such as silicon oxide, silicon nitride, silicon oxynitride, etc., and can also be selected from polyimide or other applicable organic insulating materials. In addition, the first conductive layer, the second conductive layer and the third conductive layer can be made of metal conductive materials, and the fourth conductive layer can be made of transparent conductive materials, but not limited to this. The metal conductive material may include copper, aluminum, molybdenum, silver or alloys of the above metals, and the film layer of the metal conductive material may be stacked by multiple sub-metal layers (the materials of the sub-metal layers may be the same or different). Transparent conductive materials may include indium tin oxide, indium zinc oxide, etc.

[0042] Figure 5 FIG. 1 is a top view schematically showing a touch electrode in an electronic paper display panel according to an embodiment of the present invention. Figure 5 The touch electrode 142C can be used as Figure 1 The touch electrode 142C includes N capacitor electrodes CE. Each of the capacitor electrodes CE can be disposed at a corresponding one of the driving pixels (see Figure 2 The driving pixel 144A or Figure 4 In this embodiment, the entire row of capacitor electrodes CE arranged along the first direction D1 can be connected to form a single touch electrode 142C through multiple capacitor connection segments CC3. Therefore, the multiple touch electrodes 142C each extend along the first direction D1 and the multiple touch electrodes 142C can be arranged in parallel along the second direction D2. The multiple touch electrodes 142C can be individually signal-connected to the drive circuit (such as Figure 1 In other embodiments, the touch electrodes 142C may be formed by connecting multiple rows of capacitor electrodes CE, not limited to a single row of capacitor electrodes CE. For example, the designer may determine the size of the touch electrodes 142C according to the resolution required by the touch function.

[0043] Figure 6 1 is a top view schematic diagram of a common electrode layer in an electronic paper display panel according to an embodiment of the present invention. The common electrode layer 130B may include a plurality of common electrodes 132, each of which extends along the second direction D2, and the common electrodes 132 are arranged in parallel in the first direction D1. The common electrodes 132 may be independently connected to the drive circuit without being directly electrically connected to each other. In other embodiments, the common electrodes 132 may be patterned and arranged in an array, wherein each common electrode 132 may define an independent touch sensing area to allow the user to perform a single-point press operation, but is not limited thereto.

[0044] Figure 6 The long strip common electrode layer 130B can be matched with Figure 5 The touch electrode 142C is applied to the same electronic paper display panel. Figure 6 The common electrode 132 and Figure 5 The touch electrodes 142C are strip-shaped electrodes extending in different directions. Figure 6 The common electrode 132 and Figure 5 The capacitive coupling between the touch electrodes 142C can provide a mutual capacitive touch sensing function. For example, Figure 6 The common electrode 132 and Figure 5One of the touch electrodes 142C can be used as a driving electrode, and the other can be used as a reading electrode, allowing the user to perform single-point or multi-point touch operations.

[0045] Figure 7 FIG. 1 is a schematic diagram of an electronic paper display panel according to an embodiment of the present invention, wherein for the convenience of explanation, Figure 7 It mainly presents a first substrate, a common electrode layer, a touch electrode and a driving circuit. Figure 7 In the embodiment, the electronic paper display panel 100B may include a first substrate 110, a common electrode layer 130B, a plurality of touch electrodes 142C and a circuit board 170. Specifically, the electronic paper display panel 100B may also include Figure 7 The electronic ink display layer 120 / 120A, the pixel array layer 140 / 140A / 140B and the second substrate 160, 160A are not shown but described in the above embodiments. In this embodiment, the circuit board 170 can be bonded to the first substrate 110 and includes the following: Figure 1 The electronic paper display panel 100B includes a plurality of first transmission lines TP1 and a plurality of second transmission lines TP2. The common electrode layer 130B includes a plurality of common electrodes 132, which can be referred to as Figure 6 The touch electrode 142C can refer to Figure 5 In addition, the first transmission line TP1 extends between one of the touch electrodes 142C and the circuit board 170, and the second transmission line TP2 extends between one of the common electrodes 132 and the circuit board 170. In this way, each touch electrode 142C and each common electrode 132 can be independently connected to the driving circuit 150 disposed on the circuit board 170 (please refer to Figure 1 ). Therefore, the signals of the multiple touch electrodes 142C are independent from each other, and the signals of the multiple common electrodes 132 are independent from each other. When the panel is touched, the signals of the multiple common electrodes 132 are independent from each other. When the panel is displayed, the multiple common electrodes 132 can be switched to the same potential state, for example, the multiple common electrodes 132 are switched to a short circuit state.

[0046] One of the common electrode 132 and the touch electrode 142C can be used as a driving electrode and the other can be used as a reading electrode. After the driving circuit 150 provides a driving signal to the driving electrode, the driving circuit 150 can read the signal from the reading electrode and determine whether a touch occurs and the touch position based on the read signal. The first transmission line TP1 and the second transmission line TP2 can be set in the peripheral area of ​​the electronic paper display panel 100B, but not limited to this. For example, the first transmission line TP1 and the second transmission line TP2 can be integrated into the pixel array layer 140 / 140A / 140B described in the above embodiment and are located in the driving pixel.

[0047] Figure 8 FIG. 1 is a partial schematic diagram of a driving circuit of an electronic paper display panel according to an embodiment of the present invention. Figure 8 The part of the driving circuit related to touch sensing is provided. Figure 8 In the embodiment, the driving circuit 150 includes a field programmable logic gate array 151, a switching element 153, a multiplexer 155, a rectifier 157 and a comparator 159. In some embodiments, the field programmable logic gate array 151 can provide a signal Vsw to the switching element 153 to switch between a signal providing mode and a signal reading mode. The field programmable logic gate array 151 provides a signal Vsw to switch the switching element 153 to the signal providing mode, and the driving circuit 150 can provide a signal TFT_VCOM_Ix to the corresponding touch electrode (such as Figure 1 The touch electrode 142, Figure 5 When the field programmable logic gate array 151 provides a signal Vsw to switch the switching element 153 to the signal reading mode, it also provides a control signal Vcl to the multiplexer 155 so that the multiplexer 155 can read the corresponding touch electrodes (such as Figure 1 The touch electrode 142, Figure 5 The signal TFT_VCOM_Ox is read from the touch electrode 142C of the multiplexer 155. The signal TFT_VCOM_Ox read by the multiplexer 155 can be processed by the rectifier 157 and the comparator 159 and then transmitted to the field programmable logic gate array 151. The comparator 159 can compare the received processed signal with the reference potential Vref to determine whether a touch action occurs. The field programmable logic gate array 151 can determine whether a touch action occurs and / or determine the touch position based on the result provided by the comparator 159.

[0048] In summary, the electronic paper display panel of the embodiment of the present invention uses one of the existing capacitor electrode and the common electrode layer as the touch electrode, thereby achieving the dual functions of touch and display without increasing the volume of the structure.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electronic paper display panel, characterized in that: include: Electronic ink display layer; A first substrate, disposed on a first side of the electronic ink display layer; a pixel array layer, disposed between the first substrate and the electronic ink display layer, the pixel array layer comprising a plurality of touch electrodes and a plurality of driving pixels arranged in an array, wherein each of the driving pixels comprises a first pixel electrode and a second pixel electrode, and the touch electrodes, the first pixel electrodes and the second pixel electrodes overlap each other; a common electrode layer, disposed on a second side of the electronic ink display layer, the second side being opposite to the second side; as well as The driving circuit transmits signals to the individual touch electrodes.

2. The electronic paper display panel according to claim 1, characterized in that: The touch electrode includes N capacitor electrodes, each of the N capacitor electrodes is located in one of the driving pixels and overlaps the corresponding pixel first electrode and the corresponding pixel second electrode, and N is greater than 1 and does not exceed the number of the driving pixels.

3. The electronic paper display panel according to claim 1, characterized in that: Each of the touch electrodes extends along a first direction, and the touch electrodes are arranged in parallel along a second direction, wherein the first direction intersects with the second direction.

4. The electronic paper display panel according to claim 3, characterized in that: The common electrode layer includes a plurality of common electrodes, each of the common electrodes extends along the second direction, and the common electrodes are arranged in parallel along the first direction.

5. The electronic paper display panel according to claim 1, characterized in that: The touch electrodes are arranged in an array.

6. The electronic paper display panel according to claim 1, characterized in that: The electronic paper display panel further includes a second substrate disposed opposite to the first substrate, and the common electrode layer is located between the second substrate and the electronic ink display layer and directly contacts the electronic ink display layer.

7. The electronic paper display panel according to claim 1, characterized in that: The driving circuit is adapted to alternately execute a signal providing mode and a signal reading mode on the touch electrodes.

8. The electronic paper display panel according to claim 1, characterized in that: The common electrode layer includes a plurality of common electrodes, and the common electrodes are arranged in an array to define independent touch sensing areas.

9. The electronic paper display panel according to claim 1, characterized in that: Each of the driving pixels further includes an active element, wherein the active element includes a gate, a source and a drain, and both the first pixel electrode and the second pixel electrode are connected to the drain.

10. The electronic paper display panel according to claim 1, characterized in that: The first pixel electrode includes two pixel electrode sub-layers made of different materials.

11. The electronic paper display panel according to claim 1, characterized in that: Each of the touch control electrodes includes a plurality of capacitor electrodes and a plurality of connection segments, wherein the connection segments connect the capacitor electrodes together, and each of the capacitor electrodes is located in one of the driving pixels.

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