TWI540559B - Source driving circuit - Google Patents

Description

Source drive circuit

The invention relates to a source driving circuit, in particular to a simplified design source driving circuit for providing three source voltages for driving an electrophoretic display.

With the rapid development of electronic mobile devices, the development of products that are light and thin or energy-saving and carbon-reducing are all inextricably linked. Among them, for the purpose of electrophoretic display technology (also referred to as electronic paper or electrophoretic display), the design of related electronic driving circuits has become one of the hot topics for the purpose of pursuing light portable belts and reducing power consumption.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a source driving circuit 10 for driving an electrophoretic display in the prior art. In order to cooperate with the display technology of the electrophoretic display, the conventional source driving circuit 10 needs to provide a high level voltage, a low level voltage or a ground voltage to drive the related operation. As shown in FIG. 1, the source driving circuit 10 includes a bit. The quasi-conversion module 100, an output module 102, and a temporary storage and determination module 104. Preferably, the level conversion module 100 is coupled between the output module 102 and the temporary storage and determination module 104. The level conversion module 100 includes three level conversion units 1000, 1002, and 1004, and each The level conversion unit is driven by a full amplitude voltage source and coupled to an intermediate endpoint of the temporary storage and determination module 104. In addition, the temporary storage and determination module 104 correspondingly generates different digital signal combinations, such as 00, 01, 10, 11 and other two-digit digital signals, according to an input signal A0, A1, and correspondingly provided to multiple intermediate endpoints. The level conversion units 1000, 1002, and 1004 are received. Accordingly, the level conversion units 1000, 1002, and 1004 driven by the full-amplitude voltage source can correspond to the on-state of the three transistor switches 1020, 1022, and 1024 of the open/close output module 102, correspondingly generated by an output terminal SO. A high level voltage, a low level voltage or a ground voltage drives the display operation of the source driving circuit 10.

However, the source driving circuit 10 used in the conventional technology must use a large number of level conversion units, which will result in the final design of the source driving circuit 10 occupying a large layout area, and the corresponding power consumption cannot be used. Effectively reduced. Under such circumstances, it has become an important subject in the art to provide a circuit design to simplify the existing source driver circuit 10 to meet the product design concept of thin design and low power consumption.

Accordingly, it is a primary object of the present invention to provide a simplified source driver circuit for driving display operations of an electrophoretic display.

The present invention discloses a source driving circuit for driving an electrophoretic display. The source driving circuit includes a quasi-conversion module for receiving an input signal to generate a control signal, and an output module coupled to The level conversion module receives the control signal to provide a high level voltage, a low level voltage or a ground voltage to drive one of the display operations of the electrophoretic display.

The present invention further discloses an electrophoretic display comprising a display panel, a processing module coupled to the display panel for generating a driving signal, and a source driving circuit coupled to the display panel and the processing module. Correspondingly driving the display panel according to the driving signal, wherein the source driving circuit further comprises a quasi-conversion module for receiving an input signal to generate a control signal; and an output module coupled for The control signal is received to provide a high level voltage, a low level voltage or a ground voltage to drive one of the display operations of the electrophoretic display.

Certain terms are used throughout the description and following claims to refer to particular elements. It should be understood by those of ordinary skill in the art that manufacturers may refer to the same elements by different nouns. The scope of this specification and the subsequent patent application do not use the difference of the names as the means for distinguishing the elements, but the differences in the functions of the elements as the basis for the distinction. The term "including" as used throughout the specification and subsequent claims is an open term and should be interpreted as "including but not limited to". In addition, the term "connected" is used herein to include any direct and indirect electrical connection. Thus, if a first device is described as being connected to a second device, it is meant that the first device can be directly connected to the second device or indirectly connected to the second device through other devices or connection means.

Please refer to FIG. 2, which is a schematic diagram of an electrophoretic display 2 (ie, an electronic paper display) according to an embodiment of the present invention. As shown in FIG. 2, the electrophoretic display 2 of the present embodiment includes a source driving circuit 20, a gate driving circuit 22, and a display panel 24. The source driving circuit 20 and the gate driving circuit 22 are coupled to the display panel 24, and each generates a driving signal to the display panel 24 to drive its operation. The source driving circuit 20 can output a first voltage, a second voltage or a third voltage to drive the display panel 24, and the gate driving voltage 22 generates a driving signal such as a gate voltage to activate the electrophoretic display 2. A display operation. Preferably, the source driving circuit 20 in this embodiment includes a quasi-conversion module 200, an output module 202, and a temporary storage and determination module 204. The level conversion module 200 is coupled between the output module 202 and the temporary storage and determination module 204, and includes a first level conversion unit 2000 and a second level conversion unit 2002. Each level conversion unit The driving is performed by using a half amplitude voltage source. For example, the first level conversion unit 2000 can be driven by a positive voltage VGH and a ground voltage GND, and the second level conversion unit 2002 can transmit a stable voltage source VDD and a negative The voltage VGL is driven. In addition, in the embodiment, the first voltage outputted by the source driving circuit 20 is a high level voltage, the second voltage is a low level voltage, and the third voltage is a ground voltage, which is not intended to limit the scope of the present invention.

In addition, the temporary storage and determination module 204 in this embodiment can generate a two-bit transmission data input signal DI0, DI1 to the level conversion module 200, and the two-dimensional transmission data can represent a high level state, a low level state, a ground state or a debug state, wherein the high level state can control the source driving circuit 20 to output a first voltage (eg, a high level voltage), and the low level state can control the source driving circuit 20 to output a second The voltage (for example, a low level voltage), and the ground state can control the source driving circuit 20 to output a third voltage (for example, a ground voltage GND). For example, the input data 00, 01, 10, 11 may represent a ground state, a high level state, a low level state, and a debug state, respectively, but are not limited thereto. In addition, the temporary storage and determination module 204 in this embodiment may further include a debugging module. When the temporary storage and determination module 204 generates an input signal into a debugging state (for example, input data 11), the debugging module It is also within the scope of the present invention to respond to the state in which the debug debug state is grounded to prevent the occurrence of a preset signal in the debug state.

Accordingly, the temporary storage and determination module 204 can generate different input signals (such as input data 00, 01, 10 or 11) to the level conversion module 200, so that the level conversion module 200 can output a control signal to the output. The module 202 is configured to output a first voltage, a second voltage, or a third voltage to the display panel 24, thereby starting the display operation of the electrophoretic display 2. Accordingly, compared with the circuit design of the source-level driving circuit 10 provided by the prior art, the simplified circuit of the level conversion module 200 in this embodiment only needs to utilize a half-amplitude voltage source to perform each level. The driving operation of the conversion unit, in addition, the number of level conversion units used in the level conversion module 200 can be greatly reduced, so that the products of the electrophoretic display 2 can conform to the design of a thin design and low power consumption.

Please refer to FIG. 3, which is a detailed diagram of a source driving circuit 30 according to an embodiment of the present invention. In order to simplify the description, the source driving circuit 30 of FIG. 3 omits the illustration of the temporary storage and determination module, and only includes one quasi-conversion module 300 and one output module 302, and uses the input signals generated thereby. The DI0 and DI1 are represented, and the input signals DI0 and DI1 are transmitted to the level conversion module 300. As shown in FIG. 3, the level conversion module 300 of the present embodiment includes a first level conversion unit 3000 and a second level conversion unit 3002, which respectively receive input generated by the temporary storage and determination module. The signals DI0 and DI1 are simultaneously driven by the first level conversion unit 3000 and the second level conversion unit 3002 (ie, the first level conversion unit 3000 can transmit the positive voltage VGH and the ground voltage GND). The second level conversion unit 3002 is driven by the stable voltage source VDD and the negative voltage VGL. In addition, the output module 302 of the present embodiment includes a first output unit 3020 and a second output unit 3022, wherein the first output unit 3020 and the second output unit 3022 are an inverter, and the first output unit 3020 The second output unit 3022 is coupled to the first level conversion unit 3000 and the second level conversion unit 3002, respectively. Accordingly, the first level conversion unit 3000 and the second level conversion unit 3002 can generate the control signals D0, D0B, D1, D1B according to the input signals DI0, DI1, wherein D0B is the inverse signal of D0, and D1B is D1. The reverse signal is transmitted, and the control signal D0B is transmitted to the first output unit 3020, and the control signal D1 is transmitted to the second output unit 3022. In addition, the first output unit 3020 can output one of the high level status signal VSH or the ground voltage GND as an output signal to the second output unit 3022 according to the control signal D0B. The second output unit 3022 can determine the output signal of the first output unit 3020 or a low level signal VSL according to the control signal D1, so as to generate an output voltage corresponding to an output terminal SO, and corresponding to the input signal. The value of the binary signal changes, and the output voltage provided by the second output unit 3022 can correspond to the first voltage, the second voltage, or the third voltage to drive the display operation of the electrophoretic display 2.

Please refer to FIG. 4, which is a detailed diagram of another source driving circuit 40 according to an embodiment of the present invention. Similar to the source driving circuit 30 of FIG. 3, the source driving circuit 40 of FIG. 4 includes a level conversion module 300 and an output module 402. The first level conversion unit 3000 of the level conversion module 300 The second level conversion unit 3002 can receive the input signals DI0, DI1 and is driven by a half amplitude voltage source, and the output module 402 includes a first output unit 4020 and a second output unit 4022, wherein the first output The unit 4020 and the second output unit 4022 are both inverters, and the first level conversion unit 3000 and the second level conversion unit 3002 are coupled to the first output unit 4020 and the second output unit 4022, respectively. The difference from the source driving circuit 30 is that, in the embodiment, the second output unit 4022 outputs one of the low level signal VSL or the ground voltage GND as an output signal to the first output unit 4020 according to the control signal D1. According to the control signal D0B, the first output unit 4020 determines to output the output signal of the second output unit 4022 or the high level status signal VSH to generate an output voltage at the output terminal SO, and according to the two bits corresponding to the input signal. The value of the digital signal changes, and the output voltage provided by the first output unit 4020 may correspond to the first voltage, the second voltage, or the third voltage to drive the display operation of the electrophoretic display 2.

Please refer to FIG. 5. FIG. 5 is a detailed schematic diagram of another source driving circuit 50 according to an embodiment of the present invention. Similar to the source driving circuit 30 of FIG. 3, the source driving circuit 50 of FIG. 5 includes a level conversion module 300 and an output module 502. The first level conversion unit 3000 of the level conversion module 300 The second level conversion unit 3002 can receive the input signals DI0, DI1, and is driven by a half amplitude voltage source, and the output module 502 includes a first output unit 5020 and a second output unit 5022, but different places. The first output unit 5020 and the second output unit 5022 in this embodiment are respectively a buffer. Accordingly, the first level conversion unit 3000 and the second level conversion unit 3002 are respectively coupled to the first output unit 5020 and the second output unit 5022. Further, the embodiment will be based on the control signal D0 by the first output unit 5020. Outputting one of the high level state signal VSH or the ground voltage GND as an output signal to the second output unit 5022, and then determining, by the second output unit 5022, the output signal or the low level of the first output unit 5020 according to the control signal D1B. The status signal VSL is used to generate an output voltage at the output terminal SO, and the output voltage provided by the second output unit 5022 can correspond to the first voltage and the second voltage according to the value of the binary signal corresponding to the input signal. Or a third voltage to drive the display operation of the electrophoretic display 2.

Please refer to FIG. 6. FIG. 6 is a detailed schematic diagram of another source driving circuit 60 according to an embodiment of the present invention. Similar to the source driving circuit 30 of FIG. 3, the source driving circuit 60 of FIG. 6 includes a level conversion module 300 and an output module 602. The first level conversion unit 3000 of the level conversion module 300 The second level conversion unit 3002 can receive the input signals DI0, DI1, and is driven by a half amplitude voltage source, and the output module 602 includes a first output unit 6020 and a second output unit 6022, but different places. The first output unit 6020 and the second output unit 6022 in this embodiment are respectively a buffer. Accordingly, the first level conversion unit 3000 and the second level conversion unit 3002 are respectively coupled to the first output unit 6020 and the second output unit 6022. Further, the embodiment will be based on the control signal D1B by the second output unit 6022. And outputting one of the low level state signal VSL or the ground voltage GND as an output signal to the first output unit 6020, and then determining, by the first output unit 6020, the output signal or the high level of the output second output unit 6022 according to the control signal D0. The quasi-state signal VSH is used to generate an output voltage at the output terminal SO, and the output voltage provided by the first output unit 6020 can correspond to the first voltage and the second according to the value of the binary signal corresponding to the input signal. The voltage or the third voltage is used to drive the display operation of the electrophoretic display 2.

Please refer to FIG. 7. FIG. 7 is a detailed schematic diagram of another source driving circuit 70 according to an embodiment of the present invention. Similar to the source driving circuit 30 of FIG. 3, the source driving circuit 70 of FIG. 7 includes a level conversion module 300 and an output module 702. The first level conversion unit 3000 of the level conversion module 300 And the second level conversion unit 3002 can receive the input signals DI0, DI1, and is driven by the half amplitude voltage source, and the output module 702 includes a first output unit 7020 and a second output unit 7022, but different places The first output unit 7020 is a buffer, and the second output unit 7022 is an inverter. Accordingly, the first level conversion unit 3000 and the second level conversion unit 3002 are respectively coupled to the first output unit 7020 and the second output unit 7022. Further, the embodiment will be based on the control signal D1 by the second output unit 7022. Outputting one of the low level state signal VSL or the ground voltage GND as an output signal to the first output unit 7020, and then determining, by the first output unit 7020, the output signal or the high level of the second output unit 7022 according to the control signal D0. The state signal VSH is used to generate an output voltage at the output terminal SO, and the output voltage provided by the first output unit 7020 can correspond to the first voltage and the second voltage according to the value of the binary signal corresponding to the input signal. Or a third voltage to drive the display operation of the electrophoretic display 2.

Please refer to FIG. 8. FIG. 8 is a detailed schematic diagram of another source driving circuit 80 according to an embodiment of the present invention. Similar to the source driving circuit 30 of FIG. 3, the source driving circuit 80 of FIG. 8 includes a level conversion module 300 and an output module 802. The first level conversion unit 3000 of the level conversion module 300 The second level conversion unit 3002 can receive the input signals DI0, DI1 and is driven by a half amplitude voltage source, and the output module 802 includes a first output unit 8020 and a second output unit 8022, but different places. The first output unit 8020 is an inverter, and the second output unit 8022 is a buffer. Accordingly, the first level conversion unit 3000 and the second level conversion unit 3002 are respectively coupled to the first output unit 8020 and the second output unit 8022. Further, the embodiment will be based on the control signal D1B by the second output unit 8022. Outputting one of the low level state signal VSL or the ground voltage GND as an output signal to the first output unit 8020, and then determining, by the first output unit 8020, the output signal or the high level of the second output unit 8022 according to the control signal D0B. The state signal VSH is such that the output terminal SO generates an output voltage, and the output voltage provided by the first output unit 8020 can correspond to the first voltage and the second voltage according to the value of the binary signal corresponding to the input signal. Or a third voltage to drive the display operation of the electrophoretic display 2.

Please refer to FIG. 9. FIG. 8 is a detailed schematic diagram of another source driving circuit 90 according to an embodiment of the present invention. Similar to the source driving circuit 30 of FIG. 3, the source driving circuit 90 of FIG. 9 includes a level conversion module 900 and an output module 902. The first level conversion unit 3000 of the level conversion module 300 The second level conversion unit 3002 can receive the input signals DI0, DI1, and is driven by a half amplitude voltage source, and the output module 902 includes a first output unit 9020 and a second output unit 9022, wherein the first output Unit 9020 is an inverter and includes two transistors 9020_M1, 9020_M2, while second output unit 9022 includes two transistors 9022_M1, 9022_M2. Accordingly, one of the gates of the transistor 9020_M1 and the gate of the transistor 9020_M2 of the first output unit 9020 are mutually coupled to the first level conversion unit 3000 to receive the control signal D0B, and one of the transistors 9020_M1 is poled and electrically connected. One of the crystals 9020_M2 is mutually coupled to an output terminal SO, and one of the transistors 9020_M1 is coupled to the high level signal VSH. In addition, one of the transistors 9022_M1 of the second output unit 9022 is coupled to the second level conversion unit 3002 to receive the control signal D1, and one of the gates of the transistor 9022_M1 is coupled to the second level conversion unit 3002 for receiving. The control signal D1, one of the transistors 9022_M2 is coupled to the second level conversion unit 3002 to receive the control signal D1B, and one of the diodes 9022_M1 and one of the transistors 9022_M2 are coupled to the transistor 9020_M2. a source, and one of the transistors 9022_M2 is coupled to the low level signal VSL, according to which the output terminal SO can provide the first voltage and the second according to the value of the binary signal corresponding to the input signal. The voltage or the third voltage drives the display operation of the electrophoretic display 2.

In short, the above embodiment has shown that the output module can be realized by different coupling relationships corresponding to the inverter, the buffer or the plurality of transistor components, and is driven by the half amplitude voltage source of the two conversion module units. In this embodiment, the display operation of the electrophoretic display 2 can be driven by correspondingly providing the first voltage, the second voltage or the third voltage, and the electrophoretic display 2 can conform to the product design of thin design and low power consumption. Of course, those skilled in the art can refer to the connection relationship and component composition of the above embodiments, and replace or modify the embodiments, or change the operation mode of the transistor type, input signal, control signal, etc., Driving the electrophoretic display 2 by outputting the same first voltage, second voltage, or third voltage is not intended to limit the scope of the present invention.

Please refer to FIG. 10, which is a detailed diagram of another source driving circuit 11 according to an embodiment of the present invention. As shown in FIG. 10, the source driving circuit 11 includes a quasi-conversion module 110, an output module 130, and a temporary storage and determination module 150. Preferably, the level conversion module 110 of the embodiment includes a first level conversion unit 1100, a second level conversion unit 1102, and a third level conversion unit 1104. Meanwhile, the first level conversion The unit 1100, the second level conversion unit 1102, and the third level conversion unit 1104 can be driven by using a half amplitude voltage source (ie, the first level conversion unit 1100 can be driven by the positive voltage VGH and the ground voltage GND, and the The two-bit quasi-conversion unit 1102 and the third-level conversion unit 1104 can be driven by the stable voltage source VDD and the negative voltage VGL, and the output module 130 includes three transistors 1300, 1302, and 1304, as for the temporary storage and the judgment mode. The group is coupled to the first level conversion unit 1100, the second level conversion unit 1102, and the third level conversion unit 1104, and generates an input signal to the first level conversion unit 1100, the second level conversion unit 1102, and the third Level conversion unit 1104. In addition, in the output module 1300, one gate of the transistor 1300 is coupled to the first level conversion unit 1100 to receive the control signal, and one source of the transistor 1300 receives the high level state signal VSH, the transistor. One of the gates 1302 is coupled to the second level conversion unit 1102 to receive the control signal, one source of the transistor 1302 receives the low level status signal VSL, and one of the gates of the transistor 1304 is coupled to the third level conversion unit. 1104 is used to receive the control signal. One source of the transistor 1304 receives the ground voltage GND, and one of the drains of the transistor 1300, one of the drains of the transistor 1302 and one of the gates of the transistor 1304 are coupled to each other to form an output. Point SO, and according to the value change of the binary signal corresponding to the input signal, the output terminal SO can provide the first voltage, the second voltage or the third voltage to drive the display operation of the electrophoretic display 2.

In other words, the embodiment of FIG. 10 can also use three level conversion units to receive input signals, and turn on a plurality of transistors in the output module according to different control commands generated to activate the display operation of the electrophoretic display 2. Of course, those skilled in the art can also refer to the connection relationship and component composition of the above embodiments, and replace or modify the embodiments, or change the operation mode of the transistor type, input signal, control signal, and the like. The electrophoretic display 2 is driven to output the same first voltage, second voltage or third voltage, which is not intended to limit the scope of the present invention.

Please refer to FIG. 11. FIG. 11 is a detailed schematic diagram of another source driving circuit 21 according to an embodiment of the present invention. As shown in FIG. 11 , the source driving circuit 21 includes a quasi-conversion module 210 , an output module 230 , and a transmission module 250 . Preferably, the level conversion module 210 in this embodiment includes a first level conversion unit 2100 and a second level conversion unit 2102, and the first level conversion unit 2100 and the second level conversion unit 2102. A full amplitude voltage source can be used for driving. The output module 230 includes three transistors 2300, 2302, and 2304, and the transmission module includes a first transmission unit 2500 and a second transmission unit 2502. The output module 230 is coupled to the first transmission unit 2500 and the second. Between the transmission units 2502, and the first transmission unit 2500 includes four transistors 2500_M1, 2500_M2, 2500_M3, 2500_M4, and the second transmission unit 2502 includes two transistors 2502_M1, 2502_M2. Further, the first level conversion unit 2100 and the second level conversion unit 2102 generate the control signals D0, D0B, D1, D1B to the first transmission unit 2500 and the second transmission unit 2502 according to the input signal, wherein the transistor 2500_M1 A gate is coupled to the second level shifting unit 2102 to receive the control signal D1B. One source of the transistor 2500_M1 receives the positive voltage VGH, and one of the diodes of the transistor 2500_M1 and the source of the transistor 2500_M2 are coupled to each other. One of the gates of the transistor 2300, one of the transistors 2500_M2 is coupled to the first bit conversion unit 2100 to receive the control signal D0B, and one of the gates of the transistor 2500_M2 is coupled to one of the gates of the transistor 2500_M3. Receiving the control signal D1, one source of the transistor 2500_M3 is coupled to the first level conversion unit 2100 to receive the control signal D0B, and one of the gates of the transistor 2500_M3 and one of the transistors 2500_M4 are mutually coupled to the transistor 2302 One of the gates, one of the gates of the transistor 2500_M4 is coupled to the second level conversion unit 2102 to receive the control signal D1B, one source of the transistor 2500_M4 receives the negative voltage VGL, and one of the gates of the transistor 2502_M1 is electrically connected One of the gates 2502_M2 is coupled to the second level conversion unit 2101 to receive the control signal D1. One source of the transistor 2502_M1 is coupled to the first level conversion unit 2100 to receive the control signal D0B, and the transistor 2502_M1 One of the drains and one of the transistors 2502_M2 are mutually coupled to one of the gates of the transistor 2304, one source of the transistor 2502_M2 receives the negative voltage VGL, one of the gates of the transistor 2300, and one of the transistors 2302 One end of the transistor 2304 is coupled to form an output terminal SO. One source of the transistor 2300 receives the high level signal VSH, and one of the transistors 2302 receives the low level signal VSL, and the transistor One of the sources of 2304 receives the ground voltage GND. Accordingly, the output terminal SO can drive the display operation of the electrophoretic display 2 corresponding to the first voltage, the second voltage, or the third voltage by changing the value of the binary signal corresponding to the input signal.

Therefore, the embodiment of FIG. 11 uses two level conversion units to receive input signals, and turns on a plurality of transistors in the transmission module and the output module according to different control commands generated to activate the electrophoretic display 2 Display operation. Of course, those skilled in the art can also refer to the connection relationship and component composition of the above embodiments, and replace or modify the embodiments, or change the operation mode of the transistor type, input signal, control signal, and the like. The electrophoretic display 2 is driven to output the same first voltage, second voltage or third voltage, which is not intended to limit the scope of the present invention.

In summary, the level conversion module provided in this embodiment may include a plurality of level conversion units, and the bit conversion unit will generate correspondingly according to the set temporary storage and judgment module and the input signal generated thereby. Different control signals to the transmission module and the output module to correspond to the different transmission transistors in the transmission module and the output module, thereby outputting a first voltage (such as a high level voltage), a second voltage (such as a low level voltage), or A third voltage, such as a ground voltage, drives the display operation of the electrophoretic display 2. Compared with the prior art, the present embodiment greatly reduces the number of transistors included in the source driving circuit through appropriate component components and related circuit design, so that the electrophoretic display can conform to the slim design, and the embodiment also adopts a half amplitude. The driving method of the voltage source can also meet the functions of low power and circuit simplification, thereby improving the application range and product expandability of the electrophoretic display. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

1, 2‧‧‧electrophoretic display
10, 20, 30, 40, 50, 60, 70, 80, 90, 11, 21‧‧‧ source drive circuit
100, 200, 300, 110‧‧ ‧ level conversion module
102, 202, 302, 402, 502, 602, 702, 802, 902, 130, 230‧‧‧ output modules
104, 204, 150‧‧‧ temporary storage and judgment module
1000, 1002, 1004, 2000, 2002, 3000, 3002, 1100, 1102, 1104, 2100, 2102‧‧ ‧ level conversion unit
1020, 1022, 1024, 9020_M1, 9020_M2, 9022_M1, 9022_M2, 1300, 1302, 1304, 2300, 2302, 2304, 2500_M1, 2500_M2, 2500_M3, 2500_M4, 2502_M1, 2502_M2‧‧
22‧‧‧ gate drive circuit
24‧‧‧ display panel
250‧‧‧Transmission module
2500, 2502‧‧‧Transmission module unit
3020, 3022, 4020, 4022, 5020, 5022, 6020, 6022, 7020, 7022, 8020, 8022, 9020, 9022‧‧‧ output unit
A0, A1, DI0, DI1‧‧‧ input signals
D0, D0B, D1, D1B‧‧‧ control signals
VGH‧‧‧ positive voltage
VDD‧‧‧Stable voltage source
GND‧‧‧ Grounding voltage
VGL‧‧‧negative voltage
VSH‧‧‧ high level status signal
VSL‧‧‧ low level status signal

SO‧‧‧ output endpoint

1 is a schematic diagram of a source driving circuit 10 for driving an electrophoretic display in the prior art. 2 is a schematic view of an electrophoretic display according to an embodiment of the present invention. 3 to 11 are detailed schematic views of different source driving circuits in the embodiment of the present invention.

2‧‧‧electrophoretic display

20‧‧‧Source drive circuit

200‧‧‧bit conversion module

2000, 2002‧‧ ‧ quasi-conversion unit

202‧‧‧Output module

204‧‧‧Scratch and judgment module

22‧‧‧ gate drive circuit

24‧‧‧ display panel

DI0, DI1‧‧‧ input signal

VGH‧‧‧ positive voltage

GND‧‧‧ Grounding voltage

VGL‧‧‧negative voltage

Claims (13)

A source driving circuit includes: a quasi-conversion module for receiving an input signal to generate a control signal; and an output module coupled to the level conversion module to receive the control signal to Correspondingly, a first voltage, a second voltage, or a third voltage is provided. The level conversion module includes a first level conversion unit and a second level conversion unit, and the first level conversion unit And the second level conversion unit is driven by a half amplitude voltage source. The source driving circuit of claim 1, wherein the output module comprises a first output unit and a second output unit, and the first output unit and the second output unit are respectively an inverter, The first output unit is coupled to the first level conversion unit to receive the control signal, the second output unit is coupled to the second level conversion unit to receive the control signal, and the first output unit outputs An output signal is sent to the second output unit, so that the second output unit correspondingly provides the first voltage, the second voltage, or the third voltage according to the control signal and the output signal. The source driving circuit of claim 1, wherein the output module comprises a first output unit and a second output unit, and the first output unit and the second output unit are each an inverter. The first output unit is coupled to the first level conversion unit to receive the control signal, the second output unit is coupled to the second level conversion unit to receive the control signal, and the second output unit outputs An output signal is sent to the first output unit, so that the first output unit correspondingly provides the first voltage, the second voltage or the third voltage according to the control signal and the output signal. The source driving circuit of claim 1, wherein the output module comprises a first output unit and a second output unit, and the first output unit and the second output unit are each a buffer, so that The first output unit is coupled to the first level conversion unit to receive the control signal, the second output unit is coupled to the second level conversion unit to receive the control signal, and the first output unit outputs a And outputting the signal to the second output unit, so that the second output unit correspondingly provides the first voltage, the second voltage, or the third voltage according to the control signal and the output signal. The source driving circuit of claim 1, wherein the output module comprises a first output unit and a second output unit, and the first output unit and the second output unit are each a buffer, so that The first output unit is coupled to the first level conversion unit to receive the control signal, the second output unit is coupled to the second level conversion unit to receive the control signal, and the second output unit outputs a control signal And outputting the signal to the first output unit, so that the first output unit correspondingly provides the first voltage, the second voltage, or the third voltage according to the control signal and the output signal. The source driving circuit of claim 1, wherein the output module comprises a first output unit and a second output unit, the first output unit is a buffer and the second output unit is an inverter The first output unit is coupled to the first level conversion unit to receive the control signal, the second output unit is coupled to the second level conversion unit to receive the control signal, and the second output The unit outputs an output signal to the first output unit, so that the first output unit correspondingly provides the first voltage, the second voltage or the third voltage according to the control signal and the output signal. The source driving circuit of claim 1, wherein the output module comprises a first output unit and a second output unit, the first output unit is an inverter and the second output unit is a buffer The first output unit is coupled to the first level conversion unit to receive the control signal, the second output unit is coupled to the second level conversion unit to receive the control signal, and the second output The unit outputs an output signal to the first output unit, so that the first output unit correspondingly provides the first voltage, the second voltage or the third voltage according to the control signal and the output signal. The source driving circuit of claim 1, wherein the output module comprises a first output unit and a second output unit, the first output unit is an inverter and includes a first transistor and a first a second transistor, the second output unit includes a third transistor and a fourth transistor, and one of the gates of the first transistor and one of the gates of the second transistor are coupled to the first level The switching unit receives the control signal, and one of the first transistor and the second transistor are mutually coupled to an output terminal, and one of the third transistors is coupled to the first The two-bit quasi-conversion unit receives the control signal, and one of the fourth transistor is coupled to the second level conversion unit to receive the control signal, and one of the third transistor has a drain and a fourth One source of the crystal is coupled to one of the sources of the second transistor such that the output terminal correspondingly provides the first voltage, the second voltage, or the third voltage. The source driver circuit of claim 1, wherein the level conversion module is further coupled to a temporary storage and determination module for receiving the input signal, wherein the input signal is a two-bit transmission data to indicate a high level State, a low level state, a ground voltage, or a debug status, And when the input signal is in the debugging state, the temporary storage and determination module further converts the debugging state to the ground voltage through an error detecting module. The source driving circuit of claim 1, which drives one of the display operations of an electrophoretic display according to the first voltage, the second voltage or the third voltage. An electrophoretic display, comprising: a display panel; a gate driving circuit coupled to the display panel for generating a driving signal to the display panel; and a source driving circuit coupled to the display panel, comprising: a quasi-conversion module for receiving an input signal to generate a control signal; and an output module coupled to receive the control signal to provide a first voltage, a second voltage or a first The three voltages drive a display operation of the electrophoretic display; wherein the level conversion module includes a first level conversion unit and a second level conversion unit, and the first level conversion unit and the second position The quasi-conversion unit is driven with a half amplitude voltage source. A source driving circuit includes: a quasi-conversion module for receiving an input signal to generate a control signal; and an output module coupled to the level conversion module to receive the control signal to Correspondingly providing a first voltage, a second voltage or a third voltage; The level conversion module includes a first level conversion unit, a second level conversion unit, and a third level conversion unit, and the first level conversion unit and the second level conversion unit are The third level conversion unit is driven by a half amplitude voltage source, and the output module includes a first transistor, a second transistor, and a third transistor. One of the first transistors is coupled to the gate. Receiving the control signal to the first level conversion unit, a gate of the second transistor is coupled to the second level conversion unit to receive the control signal, and one of the third transistors is coupled to the gate Receiving the control signal to the third level conversion unit, and one of the first transistor, one of the second transistor and one of the third transistor are coupled to each other to form a The output terminal is such that the output terminal correspondingly provides the first voltage, the second voltage, or the third voltage. A source driving circuit includes: a quasi-conversion module for receiving an input signal to generate a control signal; and an output module coupled to the level conversion module to receive the control signal to correspond Providing a first voltage, a second voltage, or a third voltage; and a transmission module including a first transmission unit and a second transmission unit coupled to the level conversion module and the output module Between the groups; wherein the level conversion module includes a first level conversion unit and a second level conversion unit, the first level conversion unit and the second level conversion unit utilize a full amplitude voltage source The output module includes a first transistor, a second transistor, and a third transistor. The first transmission unit includes a fourth transistor, a fifth transistor, and a sixth transistor. a seventh transistor, the second transmission unit includes an eighth transistor and a ninth transistor, and one of the fourth transistors is coupled to the gate Receiving the control signal to the second level conversion unit, one of the drains of the fourth transistor and one source of the fifth transistor are coupled to one of the gates of the first transistor, the fifth One of the gates of the transistor is coupled to the first bit conversion unit to receive the control signal, and one of the gates of the fifth transistor is coupled to one of the gates of the sixth transistor, the sixth transistor a source is coupled to the first level conversion unit to receive the control signal, and one of the sixth transistor and the seventh transistor are mutually coupled to the second transistor a gate of the seventh transistor is coupled to the second level conversion unit to receive the control signal, and one of the gates of the eighth transistor and one of the gates of the ninth transistor are coupled to each other The second level conversion unit receives the control signal, and one source of the eighth transistor is coupled to the first level conversion unit to receive the control signal, and one of the eighth transistor has a drain One of the nine transistors is mutually coupled to one of the gates of the third transistor, and one of the first transistors has a drain One of the second transistor has a drain and one of the third transistor are coupled to each other to form an output terminal, such that the output terminal correspondingly provides the first voltage, the second voltage or the third voltage .