TWI690918B - Driving circuit and driving method thereof - Google Patents

Abstract

A driving circuit and driving method thereof are provided. The driving circuit includes a detecting circuit and a transmitting circuit. The detecting circuit is configured to generate a detection signal to a transmission channel, and detect a channel length of the transmission channel according to a detection time of the detection signal, and the detecting circuit generates a data adjustment signal according to the detection time. The transmitting circuit is coupled to the detecting circuit. The transmitting circuit is configured to generate a data signal, and adjust a plurality of set values of the data signal according to the data adjustment signal.

Description

Driving circuit and driving method

The invention relates to a display device, and in particular to a driving circuit and a driving method thereof.

With the advancement of electronic technology, consumer electronic products have become an essential tool in people's lives. In order to provide a good human-machine interface, it has also become a trend to configure high-quality display devices on consumer electronic products.

In the conventional display technology, the driving circuit of a timing controller (Timing Controller) usually transmits data signals to corresponding source driving circuits through multiple transmission channels, respectively. However, in the conventional technology, since the channel length of the transmission channel between the driving circuit of the timing controller and each source driving circuit is not the same, the designer needs to adjust the channel length according to the channel length of different transmission channels. Adjust multiple settings in the data signal. In this case, the conventional technology is more time-consuming in operation and more likely to generate additional labor costs.

The invention provides a driving circuit and a driving method thereof, which can enable the driving circuit to detect the channel length of the corresponding transmission channel through the detection mechanism of the detection circuit, so that the transmission circuit can self-check the detection result of the detection circuit Adjust multiple settings of data signals to improve overall work efficiency and reduce labor costs.

The driving circuit of the present invention includes a detection circuit and a transmission circuit. The detection circuit is used to generate a detection signal to the transmission channel, and the channel length of the transmission channel is detected according to the detection time of the detection signal, and the detection circuit generates the data adjustment signal according to the detection time. The transmission circuit is coupled to the detection circuit. The transmission circuit is used to generate a data signal and adjust a plurality of settings of the data signal according to the data adjustment signal.

The driving method of the driving circuit of the present invention includes: the detection signal is generated by the detection circuit to the transmission channel, and the channel length of the transmission channel is detected according to the detection time of the detection signal, and the detection circuit detects Time to generate data adjustment signal. A data signal is generated by the transmission circuit, and a plurality of setting values of the data signal are adjusted according to the data adjustment signal.

Based on the above, the driving circuit of the present invention can obtain the channel length of the corresponding transmission channel through the detection mechanism of the detection circuit during the detection time interval, and provide it according to the channel length (or the detection time of the detection signal) Data adjustment signal to the transmission circuit. In this way, the transmission circuit can adjust multiple setting values of the data signal according to the data adjustment signal during the normal display time. In this way, regardless of the channel length of the transmission channel between the driving circuit and the source driving circuit, the driving circuit of the present invention may not require additional technical personnel to determine the data signal according to the channel length of different transmission channels To adjust multiple settings, thereby improving overall work efficiency and reducing labor costs.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

The term "coupling (or connection)" used in the entire specification of this case (including the scope of patent application) may refer to any direct or indirect connection means. For example, if it is described that the first device is coupled (or connected) to the second device, it should be interpreted that the first device can be directly connected to the second device, or the first device can be connected to another device or a certain device. Connection means indirectly connected to the second device. In addition, wherever possible, elements/components/steps using the same reference numbers in the drawings and embodiments represent the same or similar parts. Elements/components/steps that use the same reference numbers or use the same terminology in different embodiments may refer to related descriptions with each other.

FIG. 1 is a schematic diagram illustrating a driving circuit 100 according to an embodiment of the invention. Please refer to FIG. 1. In this embodiment, the driving circuit 100 includes a detection circuit 110, a transmission circuit 120 and a switch SW1. among them. The driving circuit 100 may be coupled to the transmission channel CH, and the transmission channel CH may be coupled to the source driving circuit 200.

In the driving circuit 100 shown in FIG. 1, the detection circuit 110 is coupled to the transmission circuit 120. The switch SW1 is coupled between the detection circuit 110, the transmission circuit 120, and the transmission channel CH. Wherein, the switch SW1 can be switched between the node A and the node B according to the timing state of the control signal CS1, thereby turning on the data transmission path between the transmission circuit 120 and the transmission channel CH or between the detection circuit 110 and the transmission channel CH Data transmission path.

It should be noted that this embodiment does not limit the number of driving circuits, transmission channels, and source driving circuits. Those skilled in the art can determine the number of driving circuits, transmission channels and source driving circuits according to design requirements. For example, under some design requirements, this embodiment may further include a plurality of driving circuits 100_1˜100_N, a plurality of transmission channels CH1˜CHN, and a plurality of source driving circuits 200_1˜200_N. The coupling methods and operation relationships among the driving circuits 100_1 ˜ 100_N, the transmission channels CH1 ˜CHN and the source driving circuits 200_1 ˜ 200_N are the same as those of the driving circuit 100, the transmission channel CH and the source driving circuit 200.

In addition, under other design requirements, this embodiment can also be coupled to multiple transmission channels CH, CH1~CHN through a driving circuit 100, and these transmission channels CH, CH1~CHN are then coupled to multiple The source driving circuits 200, 200_1-200_N can achieve a circuit structure of one driving circuit 100 for a plurality of source driving circuits 200, 200_1-200_N, where the above-mentioned N is a positive integer. Moreover, in the embodiment of FIG. 1, the driving circuits 100 and 100_1 ˜ 100_N may be configured in a timing controller to perform related operations in the timing controller.

Regarding the operation of the driving circuit 100 of this embodiment, specifically, when the driving circuit 100 operates in the detection time interval, the switch SW1 can be switched to the node B according to the control signal CS1 to turn on the detection circuit 110 and the transmission Data transmission path between channels CH. At the same time, the detection circuit 110 can provide the detection signal DS to the source driving circuit 200 through the transmission channel CH, and obtain the channel length of the transmission channel CH according to the detection time of the detection signal DS. Then, the detection circuit 110 can provide the data adjustment signal DAS to the transmission circuit 120 according to the detection time of the detection signal DS (or the channel length of the transmission channel CH).

On the other hand, when the driving circuit 100 operates in the normal display interval, the switch SW1 can switch to the node A according to the control signal CS1 to turn on the data transmission path between the transmission circuit 120 and the transmission channel CH. At the same time, the transmission circuit 120 can adjust a plurality of setting values of the data signal TX according to the data adjustment signal DAS. Then, the transmission circuit 120 can provide the adjusted data signal TX to the corresponding source driving circuit 200 through the transmission channel CH.

Among them, the driving circuits 100_1 to 100_N, the transmission channels CH1 to CHN and the source driving circuits 200_1 to 200_N shown in FIG. Repeat.

According to the above description of the embodiment of FIG. 1, it can be known that the driving circuit 100 can obtain the channel length of the corresponding transmission channel CH through the detection mechanism of the detection circuit 110 during the detection time interval, and according to the channel length ( Or the detection time of the detection signal DS) to provide the data adjustment signal DAS to the transmission circuit 120. Thereby, the transmission circuit 120 can adjust a plurality of setting values of the data signal TX pre-transmitted to the source driving circuit 200 according to the data adjustment signal DAS during the normal display time. That is to say, regardless of the channel length of the transmission channel between the driving circuit and the source driving circuit, the driving circuit of this embodiment can self-adjust the multiple settings of the data signal corresponding to the row according to the detection result of the detection circuit Value, without requiring additional technicians to adjust multiple settings in the data signal according to the channel length of different transmission channels, thereby improving overall work efficiency and reducing labor costs.

FIG. 2 is a schematic diagram of the detection circuit 110 and the source driving circuit 200 according to the embodiment of FIG. 1 of the present invention. Referring to FIG. 2, the detection circuit 110 may include a counter 130 and a pulse wave generation circuit 140. The counter 130 is coupled between the transmission circuit 120 and the pulse wave generating circuit 140. The pulse wave generating circuit 140 is coupled between the counter 130 and the node B. The pulse wave generating circuit 140 may include a resistor RF, a switch SW3, and a current source ISS. The resistor RF is coupled between the node B and the reference ground GND, the switch SW3 is coupled between the node B and the current source ISS, and the current source ISS is coupled between the switch SW3 and the reference ground GND. It should be noted that, under some design requirements, the pulse wave generating circuit 140 may be a pulse wave generating circuit well known to those skilled in the art for generating pulse waves, or other pulse wave generating circuits.

In addition, please refer to FIG. 2 and FIG. 3 at the same time. FIG. 3 is a schematic diagram illustrating a look-up table 150 according to an embodiment of the present invention. In this embodiment, the look-up table 150 can be coupled to the counter 130, wherein the look-up table 150 can be used to record the channel length of the transmission channel CH (or the detection time of the detection signal DS) and a plurality of setting values of the data signal TX (For example, the relationship between the voltage amplitude level (Swing Level), the pre-emphasis coefficient, and the equalization coefficient of the data signal TX). In this embodiment, the look-up table 150 may be built in the driving circuit 100, or under other design requirements, the look-up table 150 may also be externally coupled to the driving circuit 100 and coupled with the counter 130.

Specifically, the pulse wave generating circuit 140 can be used to generate the detection signal DS according to the timing state of the control signal CS3. For example, when the switch SW3 is turned on according to the control signal CS3, the pulse wave generating circuit 140 can generate the detection signal DS according to the current generated by the current source ISS and the resistance RF. Then, the counter 130 can count the detection time of the detection signal DS during the detection time interval according to the reference clock signal REF_CLK. Moreover, the detection circuit 110 can search for a plurality of setting values corresponding to the data signal TX from the look-up table 150 according to the counting result of the counter 130 (that is, the detection time of the detection signal DS) to correspondingly generate the data adjustment signal DAS.

On the other hand, in the source driving circuit 200 shown in FIG. 2, the source driving circuit 200 may include a receiving circuit 210 and a switch SW2. The receiving circuit 210 is coupled to the transmission channel CH through the node C. The switch SW2 is coupled between the node C and the reference ground GND. The source driving circuit 200 can determine the data transmission path between the transmission channel CH and the receiving circuit 210 or the data transmission path between the transmission channel CH and the reference ground GND according to the timing state of the control signal CS2.

FIG. 4 is a timing diagram illustrating a driving circuit 100 according to an embodiment of the invention. Please also refer to FIGS. 1 to 4 for details of the operation of the driving circuit 100. In detail, when the driving circuit 100 operates in the initial time interval T1, the control signal CS1 can be set to a high voltage level (eg, the voltage level V11 ), so that the switch SW1 can switch to the node A according to the control signal CS1 and turn on the data transmission path between the transmission circuit 120 and the transmission channel CH. In addition, the control signal CS2 can be set to a high voltage level (eg, the voltage level V21), so that the switch SW2 can be turned off according to the control signal CS2. In other words, in the initial time interval T1, the transmission circuit 120, the transmission channel CH, and the receiving circuit 210 of the source driving circuit 200 may form a first data transmission path.

Further, in the initial time interval T1, the transmitting circuit 120 can provide the data signal TX to the receiving circuit 210 through the first data transmission path, so that both the driving circuit 100 and the source driving circuit 200 can confirm the first A data transmission path has been formed. The data signal TX in this embodiment may be a differential signal, and when the first data transmission path is formed, the positive polarity signal and the negative polarity signal of the differential signal may be set to high voltage levels.

It is worth mentioning that when the driving circuit 100 is switched from the initial time interval T1 to the detection time interval T2, the control signal CS2 can be first set to a low voltage level (eg, voltage level V22) to enable the switching The switch SW2 can be turned on according to the control signal CS2. Then, when the driving circuit 100 operates in the detection time interval T2, the control signal CS1 can be set to a low voltage level (eg, the voltage level V12), so that the switch SW1 can switch to the node according to the control signal CS1 B, and turn on the data transmission path between the detection circuit 110 and the transmission channel CH. At the same time, the switch SW3 can be turned on according to the control signal CS3 set to the enabled state, so that the driving circuit 100 can start to activate the detection mechanism of the detection circuit 110. In other words, in the detection time interval T2, the detection circuit 110, the transmission channel CH, and the reference ground GND of the source driving circuit 200 may form a second data transmission path.

In detail, in the detection time interval T2, the detection circuit 110 may provide the generated detection signal DS to the reference ground GND of the source driving circuit 200 through the second data transmission path. It is worth mentioning that, in this embodiment, the detection circuit 110 may define the detection time TDS1 as the time when the detection signal DS is transmitted to the reference ground GND of the source driving circuit 200. Then, after the reference ground GND of the source driving circuit 200 receives the detection signal DS, the source driving circuit 200 can further transmit or reflect the reverse detection signal DS according to the effect of characteristic impedance To detection circuit 110. Wherein, the time for transmitting or reflecting the reverse detection signal DS to the detection circuit 110 can be defined as the detection time TDS2.

In other words, the longer the channel length of the transmission channel CH between the driving circuit 100 and the source driving circuit 200, the longer the detection time TDS (ie, the sum of the detection times TDS1 and TDS2) of the detection circuit 110 as a whole In contrast, when the channel length of the transmission channel CH between the driving circuit 100 and the source driving circuit 200 is shorter, the overall detection time TDS of the detection circuit 110 is also shorter. That is, the channel length of the transmission channel CH is positively correlated with the detection time TDS.

Here, please refer to FIG. 5A, which is a schematic diagram of the relationship between the detection time TDS and the set value of the data signal TX in the look-up table 150 shown in FIG. 3 according to the present invention. In this embodiment, the plurality of set values of the data signal TX may be the voltage amplitude level SW of the data signal TX, the pre-emphasis coefficient PEMP, and the equalization coefficient EQ, respectively. Among them, the voltage amplitude level SW can be used to adjust the DC voltage level of the data signal TX; the pre-emphasis coefficient PEMP can be used to adjust the switching speed of the data signal TX (or the amplitude of the rising and falling edges); the equalization coefficient EQ can be used to Equalize the data signal TX to optimize the data signal TX.

Referring to FIGS. 1 to 5A again, when the driving circuit 100 operates in the detection time interval T2, the counter 130 may start to count the detection time TDS of the detection signal DS. Moreover, after the counting operation of the counter 130 is completed, the detection circuit 110 can search for a plurality of setting values (that is, data signals) corresponding to the data signal TX from the look-up table 150 shown in FIG. The voltage amplitude level SW of TX, the pre-emphasis coefficient PEMP and the equalization coefficient EQ) are used to generate the data adjustment signal DAS corresponding to these set values.

For example, assuming that the counting result of the counter 130 indicates that the detection time TDS of the detection signal DS is between 5 nanoseconds (ns) to 6 ns, the detection circuit 110 may correspond to the detection time TDS Generate data adjustment signal DAS that conforms to multiple settings of data signal TX (eg, voltage amplitude level SW is 200 millivolts (mV), pre-emphasis coefficient PEMP is 1.5 decibels (dB), and equalization coefficient EQ is 3 dB) To transfer circuit 120. It should be noted that those with ordinary knowledge in the art can also set other setting values of the data signal TX in the look-up table 150 according to design requirements, and this embodiment is not limited thereto.

In addition, please refer to FIG. 5B, which is a schematic diagram of the relationship between the detection time TDS and the channel length in the look-up table shown in FIG. 3 according to the present invention. In this embodiment, the detection circuit 110 can further obtain the corresponding transmission channel CH from the look-up table 150 shown in FIG. 5B according to the counting result of the counter 130 (that is, the detection time TDS of the detection signal DS). Channel length. For example, assuming that the counting result of the counter 130 indicates that the detection time TDS of the detection signal DS is 12 ns, the detection circuit 110 can obtain the channel length of the corresponding transmission channel CH by the look-up table 150 as 11.8 unit lengths.

Referring back to FIGS. 1 to 4, when the driving circuit 100 is switched from the detection time interval T2 to the normal display time interval T3, the positive polarity signal and the negative polarity signal of the data signal TX (or differential signal) may be first Set to low voltage level. Then, when the driving circuit 100 operates in the normal display time interval T3, the control signal CS1 can be set to the high voltage level (eg, the voltage level V11) again, so that the switch SW1 can switch to the node again according to the control signal CS1 A, and turn on the data transmission path between the transmission circuit 120 and the transmission channel CH. In addition, the control signal CS2 can be set to the high voltage level (eg, the voltage level V21) again, so that the switch SW2 can be turned off according to the control signal CS2. In other words, in the normal display time interval T3, the transmission circuit 120, the transmission channel CH, and the receiving circuit 210 of the source driving circuit 200 can again form the first data transmission path.

Specifically, in the normal display time interval T3, the transmission circuit 120 can adjust and set multiple settings of the data signal TX according to the data adjustment signal DAS provided by the detection circuit 110. For example, it is also assumed that during the detection time interval T2, the counting result of the counter 130 indicates that the detection time TDS of the detection signal DS is between 5 ns and 6 ns. In this case, in the normal display time interval T3, the transmission circuit 120 can adjust the voltage amplitude level SW of the data signal TX to 200 mV according to the data adjustment signal DAS, the pre-emphasis coefficient PEMP to 1.5 dB, and etc. The EQ is adjusted to 3 dB. In this way, the transmission circuit 120 can transmit the adjusted data signal TX to the corresponding source driving circuit 200 through the first data transmission path.

In other words, regardless of the channel length of the transmission channel CH between the driving circuit 100 and the source driving circuit 200, the driving circuit 100 of this embodiment can self-adjust the corresponding data signal TX according to the result detected by the detecting circuit 110 Multiple setting values without requiring additional technicians to adjust the multiple setting values in the data signal TX according to the channel length of different transmission channels CH, thereby improving the overall work efficiency and reducing labor costs .

6 is a flowchart of a driving method of the driving circuit 100 according to an embodiment of the invention. Please refer to FIGS. 1 and 6 at the same time. In step S610, the driving circuit can generate a detection signal from the detection circuit to the transmission channel, and detect the channel length of the transmission channel according to the detection time of the detection signal. The test circuit generates the data adjustment signal according to the detection time. In step S620, the driving circuit may generate a data signal from the transmission circuit, and adjust a plurality of setting values of the data signal according to the data adjustment signal.

The implementation details of each step are described in detail in the foregoing embodiments and implementations, and will not be repeated here.

In summary, the drive circuit of the present invention can obtain the channel length of the corresponding transmission channel through the detection mechanism of the detection circuit during the detection time interval, and according to the channel length (or the detection time of the detection signal) To provide data adjustment signals to the transmission circuit. In this way, the transmission circuit can adjust multiple setting values of the data signal according to the data adjustment signal during the normal display time. In this way, regardless of the channel length of the transmission channel between the driving circuit and the source driving circuit, the driving circuit of the present invention may not require additional technical personnel to determine the data signal according to the channel length of different transmission channels To adjust multiple settings, thereby improving overall work efficiency and reducing labor costs.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

100, 100_1～100_N: drive circuit

110: detection circuit

120: Transmission circuit

130: counter

140: pulse wave generating circuit

150: Lookup table

200, 200_1～200_N: source drive circuit

210: receiving circuit

A, B, C: Node

CH, CH1～CHN: transmission channel

CS1, CS2, CS3: control signal

DS: Detect signal

DAS: data adjustment signal

EQ: Equalization coefficient

GND: Reference ground

ISS: current source

PEMP: pre-emphasis factor

REF_CLK: reference clock signal

RF: resistance

SW1, SW2, SW3: switch

SW: voltage amplitude level

S610, S620: steps

T1: initial time interval

T2: detection time interval

T3: Normal display time interval

TX: data signal

TDS, TDS1, TDS2: detection time

V11, V12, V21, V22: voltage level

FIG. 1 is a schematic diagram illustrating a driving circuit according to an embodiment of the invention. FIG. 2 is a schematic diagram of the detection circuit and the source driving circuit according to the embodiment of FIG. 1 of the present invention. FIG. 3 is a schematic diagram illustrating a lookup table according to an embodiment of the invention. 4 is a timing diagram illustrating a driving circuit according to an embodiment of the invention. 5A is a schematic diagram of the relationship between the detection time and the set value of the data signal in the look-up table shown in FIG. 3 according to the present invention. 5B is a schematic diagram of the relationship between detection time and channel length in the look-up table shown in FIG. 3 according to the present invention. 6 is a flowchart of a driving method of a driving circuit according to an embodiment of the invention.

100, 100_1~100_N: drive circuit

110: detection circuit

120: Transmission circuit

200, 200_1~200_N: source drive circuit

A, B: Node

CH, CH1~CHN: transmission channel

CS1: control signal

DS: Detect signal

DAS: data adjustment signal

SW1: switch

TX: data signal

Claims (12)

A driving circuit includes: a detection circuit for generating a detection signal to a transmission channel, and detecting the channel length of the transmission channel according to a detection time of the detection signal, and the detection circuit is based on The detection time is used to generate a data adjustment signal; a transmission circuit is coupled to the detection circuit. The transmission circuit is used to generate a data signal and adjust a plurality of settings of the data signal according to the data adjustment signal; And a first changeover switch, coupled between the transmission circuit, the detection circuit and the transmission channel, the first changeover switch conducts data transmission between the transmission circuit and the transmission channel according to a first control signal The path or the data transmission path between the detection circuit and the transmission channel. The driving circuit as described in item 1 of the patent application scope, wherein the driving circuit further comprises: a look-up table which records the relationship between the detection time and the set values of the data signal, and the detection circuit is based on the The signal is detected to generate the data adjustment signal through the lookup table. The driving circuit as claimed in item 1 of the patent application scope, wherein when the first changeover switch turns on the data transmission path between the transmission circuit and the transmission channel according to the first control signal, the transmission circuit passes through the transmission channel To provide the data signal to a source driving circuit, and, When the first changeover switch turns on the data transmission path between the detection circuit and the transmission channel according to the first control signal, the detection circuit provides the detection signal to the source driving circuit through the transmission channel . The driving circuit as described in item 3 of the patent application scope, wherein the source driving circuit includes: a receiving circuit for receiving the data signal; and a second switch, coupled to the transmission channel, the receiving circuit and Between a reference ground terminal, the second switch switches the data transmission path between the transmission channel and the receiving circuit or the data transmission path between the transmission channel and the reference ground terminal according to a second control signal. The driving circuit as described in item 4 of the patent application scope, wherein when the driving circuit operates in a detection time interval, the first switch is turned on between the detection circuit and the transmission channel according to the first control signal Data transmission path, and the second switch turns on the data transmission path between the transmission channel and the reference ground according to the second control signal, the detection circuit provides the detection signal to the Refer to the ground terminal to detect the channel length of the transmission channel, and when the driving circuit operates in a normal display time interval, the first switch switches the transmission circuit and the transmission channel according to the first control signal Data transmission path, and the second switch switches the data transmission path between the transmission channel and the receiving circuit according to the second control signal, the transmission circuit provides the data signal to the receiving circuit through the transmission channel . The driving circuit as described in item 1 of the patent application scope, wherein the detection circuit includes: a pulse wave generation circuit to generate the detection signal according to a first control signal; and a counter coupled to the pulse wave generation Between the circuit and the transmission circuit, the counter is used to count the detection time of the detection signal, wherein the detection circuit generates the data adjustment signal according to a counting result of the counter. A driving method of a driving circuit includes: generating a detection signal from a detection circuit to a transmission channel, and detecting the channel length of the transmission channel according to a detection time of the detection signal, and detecting The circuit generates a data adjustment signal according to the detection time; generates a data signal from a transmission circuit, and adjusts a plurality of setting values of the data signal according to the data adjustment signal; and a first switching switch based on a first The control signal turns on the data transmission path between the transmission circuit and the transmission channel or the data transmission path between the detection circuit and the transmission channel. The driving method as described in item 7 of the patent application scope further includes: recording the relationship between the detection time and the set values of the data signal by a look-up table; and the detection circuit according to the detection signal The lookup table is used to generate the data adjustment signal. The driving method as described in item 7 of the patent application range, wherein the first switch switches the data transmission path between the transmission circuit and the transmission channel or the detection circuit and the transmission channel according to the first control signal The steps of the data transmission path between include: when the first switching switch turns on the data transmission path between the transmission circuit and the transmission channel according to the first control signal, the transmission circuit provides the The data signal to a source driving circuit; and when the first switching switch turns on the data transmission path between the detection circuit and the transmission channel according to the first control signal, the detection circuit passes through the transmission channel The detection signal is provided to the source driving circuit. The driving method according to item 9 of the patent application scope, wherein the step of providing the data signal to the source driving circuit by the transmission circuit through the transmission channel includes: receiving the data signal by a receiving circuit; and by a first The two changeover switches conduct the data transmission path between the transmission channel and the receiving circuit or the data transmission path between the transmission channel and the reference ground according to a second control signal. The driving method as described in item 10 of the patent application range, wherein the second change-over switch turns on the data transmission path between the transmission channel and the receiving circuit or the transmission channel and the reference ground according to the second control signal The steps of the data transmission path between: When the driving circuit operates in a detection time interval, the first switching switch turns on the data transmission path between the detecting circuit and the transmission channel according to the first control signal, and the second switching switch The second control signal turns on the data transmission path between the transmission channel and the reference ground; the detection circuit provides the detection signal to the reference ground through the transmission channel to detect the transmission channel Channel length; when the driving circuit operates in a normal display time interval, the data switch path between the transmission circuit and the transmission channel is turned on by the first switch according to the first control signal, and switched by the second The switch conducts the data transmission path between the transmission channel and the receiving circuit according to the second control signal; and the transmission circuit provides the data signal to the receiving circuit through the transmission channel. The driving method as described in item 7 of the patent application scope, wherein the detection circuit generates the detection signal to the transmission channel, and detects the channel length of the transmission channel according to the detection time of the detection signal, And the step of generating the data adjustment signal by the detection circuit according to the detection time includes: generating a detection signal by a pulse wave generation circuit according to a first control signal; and generating the detection signal by a counter The detection time is counted; and the detection circuit generates the data adjustment signal according to a counting result of the counter.

Images