Driving chip and display device

Abstract

The utility model discloses a driving chip and a display device. The driving chip comprises a source electrode driving bonding pad, a grid electrode driving unit and at least two segment code driving bonding pads; the gate driving unit comprises a gate driving bonding pad or a shift register driving bonding pad; the gate driving bonding pad is connected with a gate of a transistor in the pixel driving circuit, the shift register driving bonding pad is connected with the shift register, and the shift register is connected with the gate of the transistor in the pixel driving circuit; the pixel driving circuit is connected with the pixel electrode; the segment code driving bonding pad is connected with the segment code electrode; the segment code driving bonding pad is located on the input side and / or the output side of the driving chip; or the segment code driving bonding pad is located on the first side and / or the second side of the driving chip; wherein the first side is opposite to the second side, and the input side is opposite to the output side. The driving chip can be connected with the pixel electrode and also can be connected with the segment code electrode, so that the circuit structure is simplified, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of display, in particular to a driving chip and a display device. Background Art

[0002] An electronic paper screen is a display screen made using electrophoretic display technology. By applying a voltage to each pixel point, the colored electrophoretic particles in the electronic paper film are driven to move to achieve image display. As a reflective display screen, after the image is updated, the electronic paper screen can maintain the image for a long time without continuous refreshing, so the power consumption is very low. Due to its many characteristics such as low power consumption, wide viewing angle, high contrast, and eye protection, the electronic paper screen is increasingly widely used in fields such as electronic price tags, e-books, and billboards.

[0003] According to different driving methods, electronic paper screens can be divided into dot matrix type and segment code type. Dot matrix electronic paper screens usually have a higher resolution and use active driving. The opening and closing of thin film transistors are controlled by gate traces, and the voltage of the source trace is charged into the storage capacitor of the pixel driving circuit line by line to drive the movement of electrophoretic particles in the electronic ink. Segment code electronic paper screens usually have a lower resolution and use passive driving. The movement of electrophoretic particles in the electronic ink is driven by directly applying electricity to the driving electrodes of each segment code.

[0004] Existing electronic paper screens are driven and controlled by the driving chips of the screens. The driving chips of the screens receive the control signals and image data transmitted by the external circuit and convert them into voltage waveforms and control timings for driving the refresh of the electronic paper screen. Therefore, for dot matrix electronic paper screens, driving chips for dot matrix display are required for driving, and for segment code electronic paper screens, driving chips for segment code display are required for driving.

[0005] Since existing dot matrix driving chips do not support segment code display, when it is necessary to add segment code display to a dot matrix electronic paper product, in order to realize the connection with the segment code electrodes, an additional segment code driving chip needs to be added. Setting two different types of driving chips on the same electronic paper product requires setting their respective boost circuits, communication circuits, and voltage stabilization circuits, which will increase the number of electronic components and make the circuit structure complex, resulting in high power consumption and high cost of the electronic paper product. Summary of the Utility Model

[0006] The utility model provides a driving chip and a display device to solve the problems of complex circuit structure and high cost when a pixel electrode and a segment code electrode are provided in a display device.

[0007] According to one aspect of the utility model, a driving chip is provided. The driving chip includes:

[0008] A source drive pad, connected to the source electrode of a transistor in a pixel drive circuit;

[0009] A gate drive unit, including a gate drive pad or a shift register drive pad; the gate drive pad is connected to the gate electrode of a transistor in the pixel drive circuit, the shift register drive pad is connected to a shift register, and the shift register is connected to the gate electrode of the transistor in the pixel drive circuit; the pixel drive circuit is connected to a pixel electrode;

[0010] At least two segment code drive pads; the segment code drive pads are connected to segment code electrodes; the segment code drive pads are located on the input side and / or the output side of the drive chip; or, the segment code drive pads are located on the first side and / or the second side of the drive chip; wherein, the first side is opposite to the second side, the input side is opposite to the output side, and the first side is adjacent to the input side and the output side.

[0011] Optionally, the segment code drive pads are located on the input side and / or the output side of the drive chip and are arranged in a first direction;

[0012] Or, the segment code drive pads are located on the first side and / or the second side of the drive chip and are arranged in a second direction; wherein, the first direction is the direction from the first side to the second side, and the second direction is the direction from the input side to the output side.

[0013] Optionally, a part of the gate drive units form a first pad group, and another part of the gate drive units form a second pad group; a part of the segment code drive pads form a third pad group, and another part of the segment code drive pads form a fourth pad group;

[0014] The gate drive units are located on the output side, and the third pad group and the fourth pad group are located between the first pad group and the second pad group;

[0015] Or, the gate drive units are located on the input side, the third pad group is located on the output side, and at least some of the segment code drive pads in the third pad group are located in a first corner area formed by the output side and the first side, the fourth pad group is located on the output side, and at least some of the segment code drive pads in the fourth pad group are located in a second corner area formed by the output side and the second side.

[0016] Optionally, the drive chip further includes a frame electrode drive pad; the frame electrode drive pad is connected to a frame electrode, the source drive pad is connected to a data line, and the data line is connected to the pixel drive circuit;

[0017] The frame electrode driving pad and the source electrode driving pad are located between the third pad group and the fourth pad group.

[0018] Optionally, a part of the gate driving units form a first pad group, and another part of the gate driving units form a second pad group; a part of the segment code driving pads form a third pad group, and another part of the segment code driving pads form a fourth pad group;

[0019] The gate driving units are located on the output side, the third pad group is located on the input side, and at least some of the segment code driving pads in the third pad group are located in a third corner area formed by the input side and the first side. The fourth pad group is located on the input side, and at least some of the segment code driving pads in the fourth pad group are located in a fourth corner area formed by the input side and the second side;

[0020] Alternatively, the gate driving units are located on the input side, and the segment code driving pads are located between the first pad group and the second pad group.

[0021] Optionally, the driving chip further includes an input pad, and the input pad is connected to the flexible circuit board;

[0022] The input pad is located between the third pad group and the fourth pad group.

[0023] Optionally, the driving chip further includes:

[0024] A gate driving circuit or a shift register driving circuit; the gate driving circuit is connected to the gate driving pad, and the shift register driving circuit is connected to the shift register driving pad;

[0025] A segment code driving circuit, and the segment code driving circuit is connected to the segment code driving pad.

[0026] Optionally, the driving chip further includes:

[0027] A segment code driving data storage unit, the segment code driving data storage unit is connected to the segment code driving circuit, and the segment code driving data storage unit is configured to store segment code driving data.

[0028] According to another aspect of the present invention, a display device is provided. The display device includes the driving chip, a pixel driving circuit, a pixel electrode, and at least one segment code electrode according to any embodiment of the present invention; the pixel driving circuit is connected to the pixel electrode;

[0029] The driving chip includes a gate driving unit, and the gate driving unit includes a gate driving pad which is connected to the gate of the transistor in the pixel driving circuit; alternatively, the gate driving unit includes a shift register driving pad, the display device further includes a shift register, the shift register driving pad is connected to the shift register, and the shift register is connected to the gate of the transistor in the pixel driving circuit.

[0030] Optionally, the display device is divided into a display area and a non-display area; the driving chip and the shift register are located in the non-display area;

[0031] The display area is divided into a first sub-area and a second sub-area; the pixel driving circuit and the pixel electrode are located in the first sub-area, and the segment code electrode is located in the second sub-area.

[0032] In the technical solution of the embodiment of the present invention, by integrating a source driving pad, a gate driving unit (gate driving pad or shift register driving pad), and a segment code driving pad in the same driving chip, the same driving chip can be connected to both the pixel electrode and the segment code electrode, which is convenient for realizing the connection with different types of electrodes (pixel electrode and segment code electrode), and further convenient for using one driving chip to realize segment code driving and dot matrix driving. Therefore, there is no need to set two driving chips in the display device, reducing the boost circuit, communication circuit, and voltage stabilization circuit corresponding to the driving chip, simplifying the circuit structure of the display device formed by the driving chip, and reducing the cost.

[0033] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0035] Figure 1 is a schematic structural diagram of a driving chip provided by an embodiment of the present invention;

[0036] Figure 2 is another schematic structural diagram of a driving chip provided by an embodiment of the present invention;

[0037] Figure 3It is a schematic structural diagram of another driving chip provided by an embodiment of the present utility model;

[0038] Figure 4 It is a schematic structural diagram of another driving chip provided by an embodiment of the present utility model;

[0039] Figure 5 It is a schematic structural diagram of another driving chip provided by an embodiment of the present utility model;

[0040] Figure 6 It is a schematic structural diagram of another driving chip provided by an embodiment of the present utility model;

[0041] Figure 7 It is a schematic structural diagram of another driving chip provided by an embodiment of the present utility model;

[0042] Figure 8 It is a schematic circuit diagram of a driving chip provided by an embodiment of the present utility model;

[0043] Figure 9 It is a schematic circuit diagram of another driving chip provided by an embodiment of the present utility model;

[0044] Figure 10 It is a schematic structural diagram of a display device provided by an embodiment of the present utility model;

[0045] Figure 11 It is a schematic structural diagram of another display device provided by an embodiment of the present utility model. Detailed implementation manners

[0046] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0047] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of the present utility model are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0048] An embodiment of the present utility model provides a driving chip. Figure 1 It is a schematic structural diagram of a driving chip provided by an embodiment of the present utility model. Refer to Figure 1 , the driving chip includes:

[0049] A source driving pad 320, connected to the source of the transistor in the pixel driving circuit;

[0050] A gate driving unit 100, including a gate driving pad 110 or a shift register driving pad 120; the gate driving pad 110 is connected to the gate of the transistor in the pixel driving circuit, the shift register driving pad 120 is connected to the shift register, and the shift register is connected to the gate of the transistor in the pixel driving circuit; the pixel driving circuit is connected to the pixel electrode;

[0051] At least two segment code driving pads 210; the segment code driving pads 210 are connected to the segment code electrodes; the segment code driving pads 210 are located on the input side A1 and / or the output side A2 of the driving chip; or, the segment code driving pads 210 are located on the first side A3 and / or the second side A4 of the driving chip; wherein, the first side A3 is opposite to the second side A4, the input side A1 is opposite to the output side A2, and the first side A3 is adjacent to the input side A1 and the output side A2.

[0052] Wherein, the pixel driving circuits can be arranged in one-to-one correspondence with the pixel electrodes. A plurality of pixel electrodes and a common electrode form a plurality of pixels. The pixel driving circuit can transmit a driving voltage to the pixel electrode, thereby lighting up the pixels formed by the pixel electrode and the common electrode. Among them, the common electrode can be an electronic paper film or a metal electrode, etc., and this embodiment does not make a limitation.

[0053] Wherein, the source driving pad 320 is connected to the source of the transistor in the pixel driving circuit, for example, connected to the source of the data writing transistor in the pixel driving circuit. The source driving pad 320 can be connected to the source of the transistor in the pixel driving circuit through a data line (source driving trace).

[0054] By setting the source drive pad 320, when performing dot matrix driving, data voltage (source drive voltage) can be transmitted to the data line through the source drive pad 320 to control the signal on the data line, so that the data line transmits the data voltage to the pixel drive circuit, thereby enabling the pixel drive circuit to drive the corresponding pixel electrode according to the data voltage, and further driving the corresponding pixel to emit light.

[0055] The gate drive pad 110 can be connected to the gate of the transistor in the pixel drive circuit, for example, connected to the gate of the transistor in the pixel drive circuit through the gate trace, which is convenient for driving and controlling the gate trace, thereby controlling the transistor in the pixel drive circuit, realizing the timing control of the pixel drive circuit, and facilitating the sequential lighting of pixels row by row. For example, when the gate drive pad 110 is connected to the gate of the data writing transistor in the pixel drive circuit, it can control whether the data writing transistor is turned on, so that when the data writing transistor is turned on, it can transmit data voltage (source drive voltage) to the storage capacitor and the drive transistor in the pixel drive circuit.

[0056] The shift register drive pad 120 can be connected to the shift register, for example, connected to the shift register through the shift register trace, which is convenient for controlling the signal on the shift register trace, and then controlling the output signal of the shift register, thereby controlling the transistor in the pixel drive circuit, realizing the timing control of the pixel drive circuit, enabling the shift register to control the conduction timing of the transistor in the pixel drive circuit, realizing the timing control of the pixel drive circuit, and thus realizing the sequential lighting of pixels row by row, facilitating the dot matrix driving of the driving chip. Among them, the pixel drive circuit may include a data writing transistor, a drive transistor, and a storage capacitor. The output signal of the gate drive pad 110 or the shift register can control whether the data writing transistor is turned on, thereby controlling whether the data writing transistor transmits data voltage to the drive transistor. After transmitting the data voltage to the drive transistor, the drive transistor can drive the corresponding pixel electrode according to the data voltage, and further cause the corresponding pixel to emit light. The storage capacitor can store the data voltage to maintain the driving of the pixel electrode.

[0057] The segment code drive pad 210 is connected to the segment code electrode, which is convenient for transmitting the drive voltage to the corresponding segment code electrode according to the picture to be displayed, so that the pixel formed by the drive electrode with the drive voltage and the common electrode is lit, thereby displaying the required picture, enabling the driving chip to achieve segment code driving.

[0058] Among them, for example, the pixel electrode and the segment code electrode are located in different display areas, for example, the pixel electrode and the segment code electrode are located at different display positions on the same display screen, or the pixel electrode and the segment code electrode are located on different display screens. The present embodiment does not make any limitations.

[0059] Specifically, by integrating the source driver pad 320, the gate driver unit 100 (gate driver pad 110 or shift register driver pad 120), and the segment driver pad 210 in the same driving chip, the driving chip is connected to the pixel driving circuit, or is connected to the pixel driving circuit through the shift register, and the pixel driving circuit is connected to the pixel electrode, so that the driving chip is connected to the pixel electrode. In this way, the same driving chip can be connected to both the pixel electrode and the segment electrode, facilitating the connection to different types of electrodes (pixel electrode and segment electrode), and further facilitating the realization of segment driving and dot matrix driving using one driving chip. Thus, there is no need to set two driving chips in the display device to realize the connection to different types of electrodes, reducing the boost circuit, communication circuit, and voltage regulation circuit corresponding to the driving chip, simplifying the circuit structure of the display device formed by the driving chip, and reducing the cost.

[0060] Among them, the driving chip includes an input side A1, an output side A2, a first side A3, and a second side A4. The input side A1 can be connected to a flexible printed circuit (FPC), thereby connecting to an external circuit, so as to realize power supply, voltage regulation, testing, data communication, and driving control of the driving chip by the external circuit. The output side A2 can be connected to the pixel driving circuit, facilitating the provision of a gate driving voltage and a data voltage for the pixel driving circuit, and can also be connected to the shift register to provide the required voltage and clock signal, etc. The segment driver pads 210 can all be arranged on the input side A1, or all be arranged on the output side A2; or a part is arranged on the input side A1 and another part is arranged on the output side A2, which is not limited in this embodiment. The segment driver pads 210 can all be located on the first side A3, or all be arranged on the second side A4; or a part is arranged on the first side A3 and another part is arranged on the second side A4, which is not limited in this embodiment.

[0061] It should be noted that Figure 1 the case where the segment driver pads 210 are all arranged on the output side A2 is shown, but it is not limited.

[0062] The technical solution of this embodiment, by integrating the source driver pad, the gate driver unit (gate driver pad or shift register driver pad), and the segment driver pad in the same driving chip, enables the same driving chip to be connected to both the pixel electrode and the segment electrode, facilitating the connection to different types of electrodes (pixel electrode and segment electrode), and further facilitating the realization of segment driving and dot matrix driving using one driving chip. Thus, there is no need to set two driving chips in the display device, reducing the boost circuit, communication circuit, and voltage regulation circuit corresponding to the driving chip, simplifying the circuit structure, and reducing the cost.

[0063] Based on the above technical solution, optionally, in one implementation, the segment code driving pads 210 are located on the input side A1 and / or the output side A2 of the driving chip, and are arranged along the first direction X. Wherein, the first direction X is the direction from the first side A3 to the second side A4.

[0064] Exemplarily, as Figure 1 shown, the segment code driving pads 210 are located on the output side A2 of the driving chip and are arranged along the first direction X. In this way, it is convenient for the segment code driving pads 210 to be connected to the segment code electrodes through traces, so as to transmit the driving voltage to the segment code electrodes.

[0065] Exemplarily, Figure 2 is a schematic structural diagram of another driving chip provided by an embodiment of the present invention. As Figure 2 shown, the segment code driving pads 210 are located on the input side A1 of the driving chip and are arranged along the first direction X, so as to facilitate the arrangement of the gate driving pads 110 or the shift register driving pads 120 on the output side A2, and facilitate the arrangement of other pads on the output side A2, such as the frame electrode driving pads and the source driving pads. In this way, it is convenient for the gate driving pads 110 to be connected to the pixel driving circuit in the display area, convenient for the frame electrode driving pads to be connected to the frame electrodes, and convenient for the source driving pads to be connected to the data lines.

[0066] In another implementation, the segment code driving pads 210 are located on the first side A3 and / or the second side A4 of the driving chip, and are arranged along the second direction Y; wherein, the second direction Y is the direction from the input side A1 to the output side A2.

[0067] Specifically, when the number of the segment code driving pads 210 is small, all the segment code driving pads 210 can be located on the first side A3 of the driving chip or the second side A4 of the driving chip.

[0068] When the number of the segment code driving pads 210 is large, or for the uniform distribution of the pads, a part of the segment code driving pads 210 can be located on the first side A3 of the driving chip, and another part of the segment code driving pads 210 can be located on the second side A4 of the driving chip.

[0069] In this way, other pads can be arranged on the input side A1 and the output side A2, reserving space for the arrangement of other pads. For example, it is convenient to arrange the gate driving pads 110 or the shift register driving pads 120 on the output side A2, or it is convenient to arrange the gate driving pads 110 or the shift register driving pads 120 on the input side A1, and it is convenient to arrange the input pads on the input side A1, and it is convenient to arrange the frame electrode driving pads and the source driving pads on the output side A2.

[0070] Exemplarily, Figure 3It is a schematic structural diagram of another driving chip provided by an embodiment of the present utility model. Figure 4 It is a schematic structural diagram of another driving chip provided by an embodiment of the present utility model. As Figure 3 or Figure 4 shown, a partial number of segment driving pads 210 are located on the first side A3 of the driving chip, and another partial number of segment driving pads 210 are located on the second side A4 of the driving chip.

[0071] Among them, Figure 4 compared with Figure 3 , the difference is that in Figure 3 , the gate driving unit 100 (gate driving pad 110 or shift register driving pad 120) is located on the output side A2, and in Figure 4 , the gate driving unit 100 (gate driving pad 110 or shift register driving pad 120) is located on the input side A1.

[0072] Based on the above technical solutions, optionally, a partial number of gate driving units 100 form a first pad group 101, and another partial number of gate driving units 100 form a second pad group 102; a partial number of segment driving pads 210 form a third pad group 201, and another partial number of segment driving pads 220 form a fourth pad group 202. For example, half of the gate driving units 100 form the first pad group 101, and the other half of the gate driving units 100 form the second pad group 102, so that the number of the first pad group 101 and the second pad group 102 is the same, making the pad distribution more uniform and facilitating the routing design. For example, half of the segment driving pads 210 form the third pad group 201, and the other half of the segment driving pads 210 form the fourth pad group 202, so that the number of the third pad group 201 and the fourth pad group 202 is the same.

[0073] In an implementation manner, as Figure 1 shown, the gate driving unit 100 is located on the output side A2, and the third pad group 201 and the fourth pad group 202 are located between the first pad group 101 and the second pad group 102.

[0074] Specifically, the gate driving unit 100 and the segment driving pads 210 can both be arranged on the output side A2. The first pad group 101 and the second pad group 102 can be arranged on both sides of the output side A2. For example, the first pad group 101 is located at the edge of the output side A2 close to the first side A3, and the second pad group 102 is located at the edge of the output side A2 close to the second side A4. Such an arrangement can facilitate the connection between the shift register driving pads 120 and the shift registers on the left and right borders of the display device. The third pad group 201 and the fourth pad group 202 are located between the first pad group 101 and the second pad group 102, so that the third pad group 201 and the fourth pad group 202 are located in the area close to the middle or in the middle area of the output side A2, which is convenient for the segment driving pads 210 in the third pad group 201 and the fourth pad group 202 to be connected to the segment electrodes in the display area. In this way, it is convenient for the routing design.

[0075] In another embodiment, Figure 5 is a schematic structural diagram of another driving chip provided by an embodiment of the present invention. Optionally, referring to Figure 5 , the gate driving unit 100 is located on the input side A1, the third pad group 201 is located on the output side A2, and at least some of the segment driving pads 210 in the third pad group 201 are located in the first corner area B1 formed by the output side A2 and the first side A3. The fourth pad group 202 is located on the output side A2, and at least some of the segment driving pads 210 in the fourth pad group 202 are located in the second corner area B2 formed by the output side A2 and the second side A4.

[0076] Specifically, the segment driving pads 210 can be arranged on the output side A2, the gate driving unit 100 can be located on the input side A1, and the third pad group 201 and the fourth pad group 202 can be arranged on both sides of the output side A2. For example, the third pad group 201 is located at the edge of the output side A2 close to the first side A3, that is, at least some of the segment driving pads 210 in the third pad group 201 are located in the first corner area B1 formed by the output side A2 and the first side A3. When the number of the segment driving pads 210 in the third pad group 201 is small, all the segment driving pads 210 in the third pad group 201 can be located in the first corner area B1.

[0077] The fourth pad group 202 is located at the edge of the output side A2 close to the second side A4, that is, at least some of the segment driving pads 210 in the fourth pad group 202 are located in the second corner area B2 formed by the output side A2 and the second side A4. When the number of the segment driving pads 210 in the fourth pad group 202 is small, all the segment driving pads 210 in the fourth pad group 202 can be located in the second corner area B2.

[0078] On the basis of the above technical solutions, Figure 6It is a schematic structural diagram of another driving chip provided by an embodiment of the present invention. Optionally, refer to Figure 5 or Figure 6 , the driving chip further includes a frame electrode driving pad 310; the frame electrode driving pad 310 is connected to the frame electrode, the source driving pad 320 is connected to the data line, and the data line is connected to the pixel driving circuit;

[0079] The frame electrode driving pad 310 and the source driving pad 320 are located between the third pad group 201 and the fourth pad group 202.

[0080] Specifically, the display device where the driving chip is located may include a frame electrode. The frame electrode is arranged around the display area of the display device. It may be an integral frame electrode forming an enclosed or semi-enclosed structure around the display area; or at least two frame electrodes may form an enclosed or semi-enclosed structure around the display area. This embodiment does not make any limitations. The driving chip includes a frame electrode driving pad 310. When the display device is packaged, a driving voltage can be transmitted to the frame electrode through the frame electrode driving pad 310, so that the pixels formed by the frame electrode emit light, thereby forming a boundary around the display area. In this way, when packaging, it can be avoided that the transparent part of the package covers the frame area outside the display area, and it can also be avoided that the non-transparent part of the package covers the display area. Thus, the transparent part covers the display area and the non-transparent part covers the frame area, which is convenient for the packaging of the display device.

[0081] The frame electrode driving pad 310 and the source driving pad 320 are located between the third pad group 201 and the fourth pad group 202. For example, if the frame electrode driving pad 310 is located between the source driving pad 320 and the segment code driving pad 210, the source driving pad 320 is set at the middle position of the output side A2, which is convenient for the source driving pad 320 to be connected to the data line of the display area of the display device and convenient for routing design.

[0082] In one implementation manner, as Figure 2 shown, the gate driving unit 100 is located on the output side A2, the third pad group 201 is located on the input side A1, and at least some of the segment code driving pads 210 in the third pad group 201 are located in the third corner area B3 formed by the input side A1 and the first side A3. The fourth pad group 202 is located on the input side A1, and at least some of the segment code driving pads 210 in the fourth pad group 202 are located in the fourth corner area B4 formed by the input side A1 and the second side A4.

[0083] Specifically, the gate driving unit 100 is located on the output side A2, and the segment code driving pads 210 can be located on the input side A1. The third pad group 201 and the fourth pad group 202 can be arranged on both sides of the input side A1. For example, the third pad group 201 is located at the edge of the input side A1 close to the first side A3, that is, at least some of the segment code driving pads 210 in the third pad group 201 are located in the third corner area B3 formed by the input side A1 and the first side A3. When the number of the segment code driving pads 210 in the third pad group 201 is small, all the segment code driving pads 210 in the third pad group 201 can be located in the third corner area B3. For example, the fourth pad group 202 is located at the edge of the input side A1 close to the second side A4, that is, at least some of the segment code driving pads 210 in the fourth pad group 202 are located in the fourth corner area B4 formed by the input side A1 and the second side A4. When the number of the segment code driving pads 210 in the fourth pad group 202 is small, all the segment code driving pads 210 in the fourth pad group 202 can be located in the fourth corner area B4.

[0084] In this way, it is convenient to reserve space for the input pads, so that the input pads can be arranged at the middle position of the input side A1, which is convenient for connecting the input pads to the flexible circuit board.

[0085] In another embodiment, Figure 7 is a schematic structural diagram of another driving chip provided by an embodiment of the present invention. Optionally, referring to Figure 7 , the gate driving unit 100 is located on the input side A1, and the segment code driving pads 210 are located between the first pad group 101 and the second pad group 102.

[0086] Specifically, the gate driving unit 100 (gate driving pads 110 or shift register driving pads 120) and the segment code driving pads 210 can both be arranged on the input side A1. The first pad group 101 and the second pad group 102 can be arranged on both sides of the input side A1. For example, the first pad group 101 is located at the edge of the input side A1 close to the first side A3, and the second pad group 102 is located at the edge of the input side A1 close to the second side A4. The segment code driving pads 210 are located between the first pad group 101 and the second pad group 102. Such an arrangement facilitates arranging the input pads at the middle position of the input side A1, which is convenient for connecting the input pads to the flexible circuit board.

[0087] Among them, the input pads can be arranged between the third pad group 201 and the fourth pad group 202, or the input pads and the segment code driving pads 210 are arranged in a cross manner, which is not limited herein.

[0088] Based on the above technical solutions, optionally, referring to Figure 2 or Figure 7, the driving chip further includes an input pad 330, and the input pad 330 is connected to the flexible circuit board;

[0089] The input pad 330 is located between the third pad group 201 and the fourth pad group 202.

[0090] Specifically, by setting the input pad 330, the input pad 330 is connected to the flexible printed circuit (FPC), thereby connecting to the external circuit, so as to realize power supply, voltage regulation, testing, data communication, driving control, etc. of the external circuit to the driving chip. The input pad 330 is located between the third pad group 201 and the fourth pad group 202, that is, the input pad 330 is located at the middle position of the input side A1, which is convenient for the input pad to be connected to the flexible circuit board.

[0091] Based on the above technical solutions, optionally, the driving chip further includes:

[0092] A gate driving circuit 410 or a shift register driving circuit 420; the gate driving circuit 410 is connected to the gate driving pad 110, and the shift register driving circuit 420 is connected to the shift register driving pad 120;

[0093] A segment driving circuit 430, and the segment driving circuit 430 is connected to the segment driving pad 210.

[0094] Exemplarily, Figure 8 is a schematic diagram of the circuit structure of a driving chip provided by an embodiment of the present invention. As Figure 8 shown, the driving chip 51 includes a gate driving circuit 410 and a segment driving circuit 430. The gate driving circuit 410 can transmit a gate driving voltage to the gate driving pad 110, thereby transmitting the gate driving voltage to the gate of the transistor in the pixel driving circuit, controlling the conduction timing of the transistor in the pixel driving circuit, and further controlling whether the corresponding pixel electrode obtains the driving voltage, so as to control whether the corresponding pixel emits light. For example, it can control the data writing transistors in the pixel driving circuit to conduct row by row, thereby writing data voltage row by row, so that the pixel driving circuit lights up the pixels row by row to realize dot matrix driving.

[0095] The segment driving circuit 430 can send a segment driving voltage to the segment driving pad 210, so that the segment driving pad 210 can transmit the segment driving voltage to the segment electrode, so that the pixel corresponding to the segment electrode emits light, thereby realizing segment driving. For example, the number of signals output by the segment driving circuit 430 is the same as the number of segment driving pads 210, which is convenient for providing a driving voltage for each segment driving pad 210.

[0096] Exemplarily, Figure 9This is another schematic diagram of the circuit structure of the driving chip provided by the embodiment of the present invention. As Figure 9 shown, the driving chip 51 includes a shift register driving circuit 420 and a segment code driving circuit 430. The shift register driving circuit 420 can send a shift register control signal to the shift register driving pad 120, such as the input voltage and clock signal of the shift register, etc., to realize the timing control of the pixel driving circuit, so that the shift register can control the conduction timing of the transistors in the pixel driving circuit, and further control whether the corresponding pixel electrode obtains the driving voltage, thereby controlling whether the corresponding pixel emits light. For example, it can control the data writing transistors in the pixel driving circuit to conduct row by row, so as to write the data voltage row by row, so that the pixel driving circuit lights up the pixels row by row to realize dot matrix driving.

[0097] In this way, by integrating the gate driving circuit 410 or the shift register driving circuit 420 and the segment code driving circuit 430 in the same driving chip, and integrating the gate driving unit 100 (gate driving pad 110 or shift register driving pad 120) and the segment code driving pad 210 in the same driving chip, the driving chip can not only realize dot matrix driving, but also realize segment code driving, realizing the function integration of dot matrix display and segment code display. Therefore, there is no need to set two driving chips in the display device, reducing the boost circuit, communication circuit and voltage stabilizing circuit corresponding to the driving chip, reducing the number of devices, simplifying the circuit structure, and reducing the cost. And it can reduce the power consumption of the display device where the driving chip is located.

[0098] On the basis of the above technical solution, optionally, referring to Figure 8 or Figure 9 , the driving chip further includes:

[0099] A segment code driving data storage unit 440, the segment code driving data storage unit 440 is connected to the segment code driving circuit 430, and the segment code driving data storage unit 440 is configured to store segment code driving data.

[0100] Specifically, the segment code driving data storage unit 440 may include a memory, which can store segment code driving data, such as color coding data. Then the segment code driving circuit 430 can obtain the color that needs to be refreshed in the display area where the segment code electrode is located from the segment code driving data storage unit 440, and generate a corresponding driving voltage to the segment code driving pad 210 to realize the driving of the segment code electrode. For example, the segment code driving circuit 430 can generate a driving voltage according to the color coding data and the driving waveform corresponding to the color to realize the voltage driving of the segment code electrode.

[0101] The color-encoding data stored in the segment code driving data storage unit 440 can be 2-bit, 3-bit, 4-bit, or other data bit numbers, which can be specifically determined according to the types of colors to be stored. For example, when there are many types of colors, the number of bits of the color-encoding data is larger; when there are few types of colors, the number of bits of the color-encoding data is smaller.

[0102] Exemplarily, Table 1 is a color-encoding data table. As shown in Table 1, four colors can be encoded. Taking colors A, B, C, and D as examples, the corresponding color encodings are 00, 01, 10, and 11 respectively. Table 2 is another color-encoding data table. As shown in Table 2, taking colors A, B, C, D, E, F, G, and H as examples, the corresponding color encodings are 000, 001, 010, 011, 100, 101, 110, and 111 respectively. Among them, the specific colors corresponding to colors A, B, C, D, E, F, G, and H can be determined according to the actual application situation, which is not limited in this embodiment.

[0103] Table 1 A color-encoding data table

[0104] Color Color-encoded data A 00 B 01 C 10 D 11

[0105] Table 2 Another color-encoding data table

[0106] Color Color-encoded data A 000 B 001 C 010 D 011 E 100 F 101 G 110 H 111

[0107] Optionally, referring to Figure 8 or Figure 9 , the driving chip further includes: an oscillator 451. The oscillator 451 can be a resistor-capacitor (RC) oscillator, and the oscillator 451 can serve as a clock source to provide a clock signal.

[0108] Optionally, referring to Figure 8 or Figure 9 , the driving chip further includes: a temperature detector 452 and an analog-to-digital converter 453; the temperature detector 452 is configured to detect the temperature of the driving chip, convert the detected analog signal into a digital signal through the analog-to-digital converter 453, and then transmit the temperature data to the corresponding register unit. Among them, the temperature detector 452 can include a temperature sensor, etc., which is not limited in this embodiment.

[0109] Optionally, referring to Figure 8 or Figure 9 , the driving chip further includes: a voltage detection circuit 454, and the voltage detection circuit 454 is used to detect whether the power supply voltage of the driving chip is lower than the voltage specification value. The voltage detection circuit 454 can include a voltage sensor, etc., which is not limited in this embodiment.

[0110] Optionally, referring to Figure 8 or Figure 9, the driving chip further includes: a communication unit 455. The communication unit 455 may include an IIC communication circuit. The communication unit 455 can implement internal communication of the driving chip and can also implement communication between different driving chips. It can also be connected to an external temperature detection chip to receive temperature data collected by the external temperature detection chip.

[0111] Optionally, refer to Figure 8 or Figure 9 , the driving chip further includes: a frame electrode driving circuit 456 and a source driving circuit 457. The frame electrode driving circuit 456 is connected to the frame electrode driving pad 310, and the source driving circuit 457 is connected to the source driving pad 320. The frame electrode driving circuit 456 can send a driving voltage to the frame electrode through the frame electrode driving pad 310, so that the pixels formed by the frame electrode emit light, thereby forming a boundary around the display area, which is convenient for packaging the display device. The source driving circuit 457 sends a data voltage (source driving voltage) to the data line (source driving trace) through the source driving pad 320, thereby transmitting the data voltage to the corresponding pixel driving circuit, which is convenient for the pixel driving circuit to transmit the driving voltage to the pixel electrode.

[0112] The embodiment of the present invention also provides a display device, Figure 10 is a schematic structural diagram of a display device provided by the embodiment of the present invention. Refer to Figure 10 , the display device includes the driving chip 51, pixel driving circuit 52, pixel electrode 53 and at least one segment code electrode 54 provided by any implementation scheme of the present invention; the pixel driving circuit 52 is connected to the pixel electrode 53;

[0113] The driving chip 51 includes a gate driving unit 100. The gate driving unit 100 includes a gate driving pad 110, and the gate driving pad 110 is connected to the gate of the transistor in the pixel driving circuit 52;

[0114] Or, Figure 11 is another schematic structural diagram of a display device provided by the embodiment of the present invention. Refer to Figure 11 , the gate driving unit 100 includes a shift register driving pad 120. The display device further includes a shift register 55. The shift register driving pad 120 is connected to the shift register 55, and the shift register 55 is connected to the gate of the transistor in the pixel driving circuit 52.

[0115] Among them, the display device can be an electronic paper display device or a display device such as a mobile phone or a watch, and this embodiment does not make a limitation.

[0116] In the technical solution of this embodiment, by integrating the source drive pad 320, the gate drive unit (gate drive pad 110 or shift register drive pad 120), and the segment code drive pad 210 in the same driving chip 51, the source drive pad 320 is connected to the source of the transistor in the pixel driving circuit to provide a data voltage (source drive voltage) for the pixel driving circuit. The gate drive pad 110 can control the transistors in the pixel driving circuit 52, and the shift register drive pad 120 can drive the shift register 55, so that the shift register 55 controls the transistors in the pixel driving circuit 52 to realize the control of the working timing of the pixel driving circuit 52, and then drive the pixel electrode 53. The segment code drive pad 210 can provide a drive voltage for the segment code electrode 54. Thus, the driving chip 51 can realize both dot matrix driving and segment code driving. Therefore, there is no need to set two driving chips 51 in the display device, reducing the boost circuit, communication circuit, and voltage stabilizing circuit corresponding to the driving chip 51, simplifying the circuit structure, and reducing the cost.

[0117] Based on the above technical solution, optionally, referring to Figure 10 or Figure 11 , the display device is divided into a display area AA and a non-display area NAA; the driving chip 51 and the shift register 55 are located in the non-display area NAA;

[0118] The display area AA is divided into a first sub-area AA1 and a second sub-area AA2; the pixel driving circuit 52 and the pixel electrode 53 are located in the first sub-area AA1, and the segment code electrode 54 is located in the second sub-area AA2.

[0119] Among them, the first sub-area AA1 and the second sub-area AA2 can be different display areas on the same display screen or can be located on different display screens, which is not limited in this embodiment.

[0120] Specifically, by setting the pixel driving circuit 52 and the pixel electrode 53 in the first sub-area AA1 and setting the segment code electrode 54 in the second sub-area AA2, the driving chip 51 can realize both dot matrix driving and segment code driving.

[0121] The above specific implementation manners do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A driving chip, characterized in that, Comprising: A source drive pad, connected to the source of the transistor in the pixel drive circuit; A gate drive unit, including a gate drive pad or a shift register drive pad; the gate drive pad is connected to the gate of the transistor in the pixel drive circuit, the shift register drive pad is connected to the shift register, and the shift register is connected to the gate of the transistor in the pixel drive circuit; the pixel drive circuit is connected to the pixel electrode; At least two segment code drive pads; the segment code drive pads are connected to the segment code electrodes; the segment code drive pads are located on the input side and / or the output side of the drive chip; or, the segment code drive pads are located on the first side and / or the second side of the drive chip; wherein, the first side is opposite to the second side, the input side is opposite to the output side, and the first side is adjacent to the input side and the output side.

2. The driving chip according to claim 1, wherein The segment code drive pads are located on the input side and / or the output side of the drive chip and are arranged in a first direction; Or, the segment code drive pads are located on the first side and / or the second side of the drive chip and are arranged in a second direction; wherein, the first direction is the direction from the first side to the second side, and the second direction is the direction from the input side to the output side.

3. The driving chip according to claim 1, characterized in that, A part of the gate drive units form a first pad group, and another part of the gate drive units form a second pad group; a part of the segment code drive pads form a third pad group, and another part of the segment code drive pads form a fourth pad group; The gate drive units are located on the output side, and the third pad group and the fourth pad group are located between the first pad group and the second pad group; Or, the gate drive units are located on the input side, the third pad group is located on the output side, and at least a part of the segment code drive pads in the third pad group are located in a first corner area formed by the output side and the first side, the fourth pad group is located on the output side, and at least a part of the segment code drive pads in the fourth pad group are located in a second corner area formed by the output side and the second side.

4. The driving chip according to claim 3, wherein, It further includes a border electrode drive pad; the border electrode drive pad is connected to the border electrode, the source drive pad is connected to the data line, and the data line is connected to the pixel drive circuit; The border electrode drive pad and the source drive pad are located between the third pad group and the fourth pad group.

5. The driving chip according to claim 1, wherein A part of the gate drive units form a first pad group, and another part of the gate drive units form a second pad group; a part of the segment code drive pads form a third pad group, and another part of the segment code drive pads form a fourth pad group; The gate driving unit is located on the output side, the third pad group is located on the input side, and at least some of the segment driving pads in the third pad group are located in a third corner area formed by the input side and the first side. The fourth pad group is located on the input side, and at least some of the segment driving pads in the fourth pad group are located in a fourth corner area formed by the input side and the second side; Alternatively, the gate driving unit is located on the input side, and the segment driving pads are located between the first pad group and the second pad group.

6. The driving chip according to claim 5, wherein It further includes input pads, and the input pads are connected to a flexible circuit board; The input pads are located between the third pad group and the fourth pad group.

7. The driving chip according to claim 1, wherein It further includes: A gate driving circuit or a shift register driving circuit; the gate driving circuit is connected to the gate driving pads, and the shift register driving circuit is connected to the shift register driving pads; A segment driving circuit, and the segment driving circuit is connected to the segment driving pads.

8. The driving chip according to claim 7, wherein It further includes: A segment driving data storage unit, the segment driving data storage unit is connected to the segment driving circuit, and the segment driving data storage unit is configured to store segment driving data.

9. A display device, characterized in that, It includes: The driving chip, pixel driving circuit, pixel electrode and at least one segment electrode according to any one of claims 1-8; The pixel driving circuit is connected to the pixel electrode; The driving chip includes a gate driving unit, the gate driving unit includes gate driving pads, and the gate driving pads are connected to the gates of the transistors in the pixel driving circuit; alternatively, the gate driving unit includes shift register driving pads, the display device further includes a shift register, the shift register driving pads are connected to the shift register, and the shift register is connected to the gates of the transistors in the pixel driving circuit.

10. The display device according to claim 9, wherein The display device is divided into a display area and a non-display area; the driving chip and the shift register are located in the non-display area; The display area is divided into a first sub-area and a second sub-area; the pixel driving circuit and the pixel electrode are located in the first sub-area, and the segment electrode is located in the second sub-area.

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