TWI671726B - Display device and adjustment method thereof - Google Patents

Abstract

A display device and an adjusting method thereof. The display device includes a plurality of multiplexers, a controller, and a source driver. Each multiplexer has multiple transmission channels. The controller generates a plurality of control signals to control the conduction of the transmission channel of the multiplexer, and the controller generates a driving capability adjustment signal according to the control signals. The source driver generates a plurality of source driving signals, and adjusts the signals according to the driving capability to adjust the driving capability of each source driving signal.

Description

Display device and adjustment method thereof

The present invention relates to a display device and an adjusting method thereof, and in particular to a display device and an adjusting method thereof capable of adjusting a driving capability of a source driving signal provided by a source driver.

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

In the conventional display device, the multiplexer usually determines the conduction status of each corresponding transmission channel according to multiple control signals provided by the controller, so that the source driver can display data through the transmitted transmission channel. Provided to the corresponding display pixels. However, in a display time interval, when two or more transmission channels are turned on at the same time in each multiplexer, the source driver may have a corresponding driving pixel due to insufficient driving capability of the source driving signal. The problem of uneven charging rate occurs, which further affects the performance of the display device.

The invention provides a display device and an adjusting method thereof, which can improve the display quality by adjusting the driving capability of a source driving signal provided by a source driver.

The display device of the present invention includes a plurality of multiplexers, a controller, and a source driver. Each multiplexer has multiple transmission channels. The controller generates a plurality of control signals to control the conduction of each transmission channel of each multiplexer, and the controller generates a driving capability adjustment signal according to the control signals. The source driver is coupled to the controller, and the source driver generates multiple source driving signals, and adjusts the signals according to the driving capability to adjust the driving capability of each source driving signal.

The driving capability adjusting method of the present invention includes generating a plurality of control signals to control the conduction of multiple transmission channels of the multiplexer, respectively; generating a driving capability adjusting signal according to the control signal; and adjusting a source according to the driving capability adjusting signal Driving ability of driving signal.

Based on the above, the display device of the present invention can use the controller to provide a driving capability adjustment signal to the source driver according to the conduction number of the transmission channels, so that the source driver can adjust the source driving signal according to the driving capability adjustment signal. Drive capability. In this way, the display device of the embodiment of the present invention can effectively reduce the problem of uneven charging rate of each corresponding display pixel due to insufficient driving capability of the source driving signal, thereby improving the working efficiency of the display device.

In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

FIG. 1A is a schematic diagram illustrating a display device according to an embodiment of the invention. Referring to FIG. 1A, the display device 100A includes a plurality of multiplexers MUX2_1 to MUX2_N, a controller 110, a source driver 120, and a voltage shifter 130. The source driver 120 includes a plurality of driving circuits DC1 to DCN, and each of the multiplexers MUX2_1 to MUX2_N has a plurality of transmission channels CH1 to CHA, respectively. In this embodiment, the voltage shifter 130 is coupled between the multiplexers MUX2_1 to MUX2_N and the controller 110, and the controller 110 is coupled between the voltage shifter 130 and the source driver 120. The controller 110 may be used to provide control signals CS1 to CS2 to the voltage shifter 130, and the voltage shifter 130 may shift the voltage values of the received control signals CS1 to CS2 to generate an offset voltage. Control signals ACS1 to ACS2. Then, the voltage shifter 130 may transmit the control signals ACS1 to ACS2 to the corresponding multiplexers MUX2_1 to MUX2_N, so as to control the conduction states of the transmission channels CH1 to CHA. Wherein, the above-mentioned A may be twice of N, and A and N may be any positive integers.

It is worth noting that, in this embodiment, each of the data lines SL1 to SLN in the source driver 120 can be connected to the corresponding two transmission channels CH1 to CHA respectively. For example, the driving circuit DC1 can transmit the source driving signal S1 to the transmission channels CH1 and CH3 through the data line SL1, and the driving circuit DC2 can transmit the source driving signal S2 to the transmission channels CH2 and CH4 through the data line SL2. The rest can be deduced by analogy, but the present invention is not limited to this. In addition, in this embodiment, each transmission channel CH1 to CHA can determine the conduction state according to the control signals ACS1 to ACS2, respectively. For example, the transmission channels CH1 and CH2 can be controlled by the control signal ACS1, the transmission channels CH3 and CH4 can be controlled by the control signal ACS2, and the rest can be deduced by analogy, but the present invention is not limited thereto.

On the other hand, the source driver 120 may use a plurality of driving circuits DC1 to DCN to provide the source driving signals S1 to SN to the corresponding multiplexers MUX2_1 to MUX2_N, respectively. In this way, the source driver 120 can transmit the display data to the corresponding display pixels through the multiplexers MUX2_1 to MUX2_N. In particular, in the embodiments of the present invention, those skilled in the art can determine the number of multiplexers, transmission channels, driving circuits, control signals, and source driving signals according to the design requirements of the display device 100A. The invention is not limited to the number shown in FIG. 1A. In addition, each of the multiplexers MUX2_1 to MUX2_2 in this embodiment may have a transmission channel constructed by two or three switches, but the embodiment of the present invention is not limited thereto.

Specifically, in this embodiment, the controller 110 may generate the driving capability adjustment signal DCS according to the conduction number of the transmission channels CH1 to CHA in each of the multiplexers MUX2_1 to MUX2_N, and provide the driving capability adjustment signal DCS to the source.极 Driver 120. The source driver 120 may adjust the driving capabilities of the source driving signals S1 to SN according to the driving capability adjusting signal DCS. In addition, the controller 110 can also provide a timing control signal CLK to the source driver 120 so that the source driver 120 can control the switching timing of the driving capability adjustment signal DCS according to the timing control signal CLK.

Further, when the display device 100A is operated in a display time interval, the controller 110 may provide a corresponding signal according to the conduction number of the transmission channels CH1 to CHA (that is, the enabled states of the control signals CS1 to CS2). The driving capability adjustment signal DCS is sent to the source driver 120, so that the source driver 120 can obtain information about the conduction number of the transmission channels CH1 to CHA by receiving the driving capability adjustment signal DCS. Then, the source driver 120 may decide whether to adjust the driving capabilities of the source driving signals S1 to SN according to the driving capability adjusting signal DCS. For example, using the multiplexers MUX2_1 and MUX2_2 as examples, when the controller 110 sets the control signal CS1 and the control signal CS2 to be enabled (for example, logic 1), the control signals ACS1 and When the control signal ACS2 is also enabled, the transmission channels CH1 to CH4 can be turned on. At the same time, the source driver 120 can adjust the driving capabilities of the source driving signals S1 to S2 to the state of the first thrust according to the driving capability adjusting signal DCS. In contrast, when the controller 110 sets one of the control signals CS1 and CS2 to an enabled (eg, logic 1) state (that is, one of the control signals ACS1 and ACS2 after voltage offset) (The same is the enabled state), the transmission channel CH1, CH2 or the transmission channels CH3, CH4 can be turned on. At the same time, the source driver 120 can adjust the driving capabilities of the source driving signals S1 to S2 to the second thrust state according to the driving capability adjusting signal DCS. It is worth mentioning that the first thrust and the second thrust in this embodiment may be, for example, the magnitude of the driving current provided by the source driver 120 to drive the source driving signals S1 to SN. The driving capability of the first thrust may be greater than the driving capability of the second thrust, for example, the driving capability of the first thrust is twice the driving capability of the second thrust, but the embodiment of the present invention is not limited thereto.

According to the above, it can be known that the source driver 120 in this embodiment may decide to adjust the driving capability of the source driving signals S1 to S2 to the first thrust force or the second thrust force according to the conduction quantity of each transmission channel CH1 to CH4. That is, when the conduction number of the transmission channels CH1 to CHA is large, the source driver 120 may adjust the driving capability of the driving source driving signals S1 to SN to the first thrust force according to the driving capability adjusting signal DCS. In contrast, when the conduction number of the transmission channels CH1 to CHA is small, the source driver 120 may adjust the driving capability of the driving source driving signals S1 to SN to the second thrust according to the driving capability adjusting signal DCS. In this way, the display device 100A according to the embodiment of the present invention can reduce the problem of uneven charging rate of each corresponding display pixel due to insufficient driving capability of the source driving signals S1 to SN, thereby improving the operation of the display device 100A. efficacy.

FIG. 1B is a schematic diagram illustrating a display device according to another embodiment of the present invention. Please refer to FIG. 1A and FIG. 1B at the same time. In this embodiment, the elements in the display device 100B are substantially the same as the elements in the display device 100A, and the same elements use the same or similar reference numerals. Different from the previous embodiment, in this embodiment, each of the data lines SL1 to SL2 in the source driver 120 can be connected to the corresponding three transmission channels CH1 to CH6, respectively. For example, the driving circuit DC1 can transmit the source driving signal S1 to the transmission channels CH1, CH3, and CH5 through the data line SL1, and the driving circuit DC2 can transmit the source driving signal S2 to the transmission channel CH2 through the data line SL2. CH4 and CH6, and the rest can be deduced by analogy, but the present invention is not limited thereto. It should be noted that, in the embodiment of FIG. 1B, the number of transmission channels may be three times the number of multiplexers.

In addition, in this embodiment, each of the transmission channels CH1 to CH6 can determine the conduction state according to the control signals ACS1 to ACS3, respectively. For example, transmission channels CH1 and CH4 can be controlled by the control signal ACS1, transmission channels CH2 and CH5 can be controlled by the control signal ACS2, transmission channels CH3 and CH6 can be controlled by the control signal ACS3, and the rest can be deduced by analogy, but The invention is not limited to this.

In detail, the multiplexers MUX3_1 and MUX3_2 are taken as examples. When the controller 110 sets the control signals CS1 to CS3 to be enabled (for example, logic 1), the control signals ACS1 to ACS3 after voltage offset are the same. When they are all enabled), the transmission channels CH1 to CH6 can be turned on. At the same time, the source driver 120 can adjust the driving capabilities of the source driving signals S1 to S2 to the state of the first thrust according to the driving capability adjusting signal DCS. In contrast, when the controller 110 sets two of the control signals CS1 to CS3 to the enabled (eg, logic 1) state (that is, two of the control signals ACS1 to ACS3 after voltage offset are also the same) State), two of the transmission channels CH1 to CH3 can be turned on, and two of the transmission channels CH4 to CH6 can be turned on. At the same time, the source driver 120 can adjust the driving capabilities of the source driving signals S1 to S2 to the second thrust state according to the driving capability adjusting signal DCS. In addition, when the controller 110 sets one of the control signals CS1 to CS3 to an enabled (eg, logic 1) state (that is, one of the control signals ACS1 to ACS3 after voltage offset is also enabled) State), one of the transmission channels CH1 to CH3 can be turned on, and one of the transmission channels CH4 to CH6 can also be turned on. At the same time, the source driver 120 can adjust the driving capabilities of the source driving signals S1 to S2 to the third thrust state according to the driving capability adjusting signal DCS. Wherein, the driving capability of the first thrust may be greater than the driving capability of the second thrust, and the driving capability of the second thrust may be greater than the driving capability of the third thrust, but the embodiment of the present invention is not limited to this. this.

FIG. 2 is a schematic diagram illustrating a controller and a source driver according to the embodiment of FIG. 1B of the present invention. Please refer to FIG. 1B and FIG. 2 at the same time. In this embodiment, the controller 110 further includes a control logic circuit 210 and a logic circuit 220. The source driver 120 further includes a control logic circuit 230 and a register 240. Wherein, in the source driver 120, each of the driving circuits DC1 to DCN may include a plurality of amplifier circuits AP1 to APB, and the plurality of amplifier circuits AP1 to APB included in each of the driving circuits DC1 to DCN are coupled to each other in parallel. In particular, in this embodiment, when adjusting the driving capabilities of the driving circuits DC1 to DCN, the source driver 120 may use the control logic circuit 230 to control the number of enabled amplifier circuits AP1 to APB, thereby adjusting Driving ability of the driving circuits DC1 to DCN. In addition, the enabled number of the amplifier circuits AP1 to APB is positively related to the driving capability adjustment signal DCS. Wherein, the aforementioned B may be any positive integer.

In detail, taking the multiplexers MUX3_1 to MUX3_2 as an example, the controller 110 may use the control logic circuit 210 to generate the control signals CS1 to CS3, and the controller 110 may offset the control signals CS1 to CS1 through the voltage shifter 250. The voltage value of CS3, and the control signals ACS1 to ACS3 after the offset voltage are transmitted to the corresponding multiplexers MUX3_1 to MUX3_2, so as to determine the conduction state and conduction quantity of each transmission channel CH1 to CH6. It is worth mentioning that, in this embodiment, the logic circuit 220 may receive the control signals CS1 to CS3 and perform logical operations (such as multi-level and logical (AND)) operations on the control signals CS1 to CS3, but not (Limited to this) to generate driving capability adjustment signals DCS1 to DCS2. Then, the logic circuit 220 can transmit the driving capability adjustment signals DCS1 to DCS2 to the control logic circuit 230 so that the control logic circuit 230 can obtain information about the conduction quantity of each transmission channel CH1 to CH6. At the same time, the control logic circuit 210 can also transmit the image signal VS to the control logic circuit 230, and the control logic circuit 230 can temporarily store the image signal VS in the register 240.

In this case, the control logic circuit 230 may provide the logic control signals LCS to the respective driving circuits DC1 to DC2 according to the driving capability adjustment signals DCS1 to DCS2, so that each of the driving circuits DC1 to DC2 may determine each of the driving circuits according to the logic control signal LCS The number of enabled amplifier circuits AP1 to APB in the driving circuits DC1 to DC2, and the driving circuits DC1 to DC2 can transmit the source driving signals S1 to S2 and the image signal VS to the corresponding multiplexer MUX3_1 ~ MUX3_2.

Further, the source driver 120 in this embodiment may cause the control logic circuit 230 to determine the number of each of the amplifier circuits AP1 to APB to be enabled according to the conduction number of the transmission channels CH1 to CH6. In addition, the driving capabilities of the source driving signals S1 to SN are adjusted by activating each of the enabled amplifier circuits AP1 to APB (for example, the driving capabilities of the source driving signals S1 to SN are adjusted to a first thrust force and a second thrust force). Or third thrust). In other words, in this embodiment, the number of conduction of the transmission channels CH1 to CH6 may be positively related to the number of enabled amplifier circuits AP1 to APB. That is, the conduction number of the transmission channels CH1 to CH6 may be positively related to the driving capability of the source driving signals S1 to SN.

FIG. 3 is a timing diagram illustrating a display device according to the embodiment of FIG. 1A of the present invention. Please refer to FIG. 1A and FIG. 3 at the same time. When the display device 100A is operated in the display time interval Ts, the controller 110 may provide a capture signal XSTB, a timing control signal CLK, and an inverted timing control signal XCLK. The timing of the data acquisition by the source driver 120 is indicated, and the timing control signal CLK and the inverted timing control signal XCLK are mutually inverted signals.

For details of the operation of the display device 100A, please refer to FIGS. 1A to 3 at the same time, and use the multiplexers MUX2_1 and MUX2_2 as examples. In detail, when the display device 100A is operated in the time intervals T1, T3, and T5, the controller 110 can set the control signals CS1 to CS2 to be enabled (for example, logic 1), that is, the transmission channels CH1 to CH4 can be used. Be turned on. It should be noted that since this embodiment only assumes that the transmission channels CH1 to CH4 in the multiplexers MUX2_1 and MUX2_2 are turned on, the control signal CS3 can be used regardless of whether the display device 100A operates in one of the time intervals T1 to T6. It is set to a disabled (for example, logic 0) state. At the same time, the logic circuit 220 can provide the driving capability adjustment signal DCS2 that is enabled (for example, logic 1) and the driving capability adjustment signal DCS1 that is disabled (for example, logic 0) to the control logic according to the control signals CS1 to CS3. Circuit 230. Next, each of the driving circuits DC1 to DC2 may determine the number of enabled multiple amplifier circuits AP1 to APB in each of the driving circuits DC1 to DC2 according to the logic control signal LCS provided by the control logic circuit 230 so that The thrust ST of the source driving signals S1 and S2 may be adjusted to the thrust A1.

On the other hand, when the display device 100A is operated in the time intervals T2, T4, and T6, the controller 110 may set one of the control signal CS1 and the control signal CS2 to an enabled (eg, logic 1) state, that is, a transmission channel. CH1, CH2 or transmission channels CH3, CH4 can be turned on. At the same time, the logic circuit 220 can provide the disabled (for example, logic 0) drive capability adjustment signals DCS1 and DCS2 to the control logic circuit 230 according to the control signals CS1 to CS3. Next, each of the driving circuits DC1 to DC2 may determine the number of enabled multiple amplifier circuits AP1 to APB in each of the driving circuits DC1 to DC2 according to the logic control signal LCS provided by the control logic circuit 230 so that The thrust ST of the source driving signals S1 and S2 may be adjusted to the thrust A2.

It is particularly mentioned that the proportional relationship between the thrust A1 and the thrust A2 in this embodiment may be 2: 1. That is, when the source driver 120 adjusts the thrust ST of the source driving signals S1 to SN to the thrust A1, the current value of the driving current when the source driver 120 adjusts the thrust ST of the source driving signals S1 to SN may be The driving capacity is adjusted to twice the current value of the driving current at the thrust A2. It should be noted that, for the relationship between the control signals CS1, CS2 and the thrust ST, refer to Table 1 below. Table 1: Control signal CS1 Control signal CS2 thrust(%) 0 1 50 1 0 50 1 1 100

FIG. 4 is a timing diagram illustrating a display device according to another embodiment of FIG. 1B of the present invention. Please refer to FIG. 1B, FIG. 2 and FIG. 4 at the same time, and use multiplexers MUX3_1 to MUX3_2 as examples. In detail, when the display device 100B is operated in the time interval T1, the controller 110 can set the control signals CS1 to CS3 to be enabled (for example, logic 1), that is, the transmission channels CH1 to CH6 can be turned on. At the same time, the logic circuit 220 may provide the enabled (for example, logic 1) drive capability adjustment signals DCS1 and DCS2 to the control logic circuit 230 according to the control signals CS1 to CS3. Next, each of the driving circuits DC1 to DC2 may determine the number of enabled multiple amplifier circuits AP1 to APB in each of the driving circuits DC1 to DC2 according to the logic control signal LCS provided by the control logic circuit 230 so that The thrust ST of the source driving signals S1 to S2 may be adjusted to the thrust A1.

On the other hand, when the display device 100B operates in the time interval T2, the controller 110 may set the control signals CS1 and CS3 to an enabled (eg, logic 1) state, and the control signal CS2 to a disabled (eg, logic 0) state. That is, the transmission channels CH1 and CH3 and the transmission channels CH4 and CH6 can be turned on, and the transmission channels CH2 and CH5 can be turned off. At the same time, the logic circuit 220 can provide the disabled (for example, logic 0) drive capability adjustment signal DCS1 and the enabled (for example, logic 1) drive capability adjustment signal DCS2 to the control logic according to the control signals CS1 to CS3. Circuit 230. Next, each of the driving circuits DC1 to DC2 may determine the number of enabled multiple amplifier circuits AP1 to APB in each of the driving circuits DC1 to DC2 according to the logic control signal LCS provided by the control logic circuit 230 so that The thrust ST of the source driving signals S1 to S2 may be adjusted to the thrust A2.

On the other hand, when the display device 100B operates in the time interval T3, the controller 110 may set the control signal CS1 to an enabled (eg, logic 1) state, and the control signals CS2 and CS3 to a disabled (eg, logic 0) state. That is, the transmission channels CH1 and CH4 can be turned on, and the transmission channels CH2, CH3, CH5, and CH6 can be turned off. At the same time, the logic circuit 220 can provide the disabled (for example, logic 0) drive capability adjustment signal DCS1 and the drive capability adjustment signal DCS2 to the control logic circuit 230 according to the control signals CS1 to CS3. Next, each of the driving circuits DC1 to DC2 may determine the number of enabled multiple amplifier circuits AP1 to APB in each of the driving circuits DC1 to DC2 according to the logic control signal LCS provided by the control logic circuit 230 so that The thrust ST of the source driving signals S1 to S2 may be adjusted to the thrust A3.

In particular, the proportional relationship between the thrust A1, the thrust A2, and the thrust A3 in this embodiment is 10: 8: 5. That is, the current value of the driving current when the source driver 120 adjusts the thrust ST of the source driving signals S1 to SN to the thrust A1 may be larger than when the source driver 120 adjusts the thrust ST of the source driving signals S1 to SN. It is the current value of the driving current at the thrust A2 and A3. In addition, the current value of the driving current when the source driver 120 adjusts the thrust ST of the source driving signals S1 to SN to the thrust A2 may be larger than when the source driver 120 adjusts the thrust ST of the source driving signals S1 to SN to The current value of the driving current at the time of the thrust A3, but the present invention is not limited to the proportional relationship exemplified above. It should be noted that, for the relationship between each of the control signals CS1 to CS3 and the thrust ST, refer to Table 2 below. Table 2: Control signal CS1 Control signal CS2 Control signal CS3 thrust(%) 0 0 1 50 0 1 0 50 0 1 1 80 1 0 0 50 1 0 1 80 1 1 0 80 1 1 1 100

According to the embodiments shown in FIG. 3 and FIG. 4, it can be known that the source driver 120 can adjust the signals DCS1 and DCS2 according to the driving capability generated by the logic circuit 220, and depending on the multiplexers MUX2_1 to MUX2_N or the multiplexers MUX3_1 to MUX3_2 The transmission channels CH1 to CHA or transmission channels CH1 to CH6 are used to determine the number of enabled multiple amplifier circuits AP1 to APB in each drive circuit DC1 to DCN, so as to adjust the source drive signals S1 to The driving capability of SN. In other words, in this embodiment, the number of enabled circuits of the amplifier circuits AP1 to APB can be the same as the conduction number of the transmission channels CH1 to CHA or transmission channels CH1 to CH6 of the multiplexers MUX2_1 to MUX2_N or multiplexers MUX3_1 to MUX3_2. Positive correlation.

FIG. 5 is a schematic diagram illustrating a controller and a source driver according to another embodiment of FIG. 2 of the present invention. Please refer to FIG. 2 and FIG. 5 at the same time. In this embodiment, the controller 510, the source driver 520, the control logic circuit 530, and the register 540 are substantially the same as the controller 110, the source driver 120, the control logic circuit 230, and Register 240, in which the same elements use the same or similar reference numerals. Different from the previous embodiment, in this embodiment, the controller 510 can simultaneously transmit the driving capacity adjustment signals DCS1 to DCS2 and the image signal VS to the control logic circuit through a transmission signal of a preset data transmission protocol. 530. The control logic circuit 530 may temporarily store the driving capability adjustment signals DCS1 to DCS2 and the image signal VS to the temporary register 540. Therefore, in this embodiment, the above-mentioned transmission method can be used to control or set the thrust (such as thrusts A1 to A3) required by each transmission channel CH1 to CH6 and the timing of switching the thrust (such as thrusts A1 to A3). It should be noted that the details of the actions between the controller 510 and the source driver 520 are the same as those in the embodiment of FIG. 2 and have been described in detail in the foregoing embodiment, and will not be repeated here.

FIG. 6 is a schematic diagram illustrating a lookup table according to an embodiment of the present invention. Please refer to FIG. 1A and FIG. 6 at the same time. In this embodiment, the lookup table 111 may be coupled to the controller 110. The lookup table 111 may be used to record the relationship between the control signals CS1 to CS2 and the driving capability adjustment signal DCS. Moreover, the controller 110 may provide the driving capability adjustment signal DCS to the source driver 120 through the lookup table 111 according to the control signals CS1 to CS2. In this embodiment, the lookup table 111 may be built in the controller 110, or in other embodiments, the lookup table 111 may be externally connected to the controller 110 and coupled to the controller 110.

FIG. 7 is a method for adjusting a driving capability of a display device according to an embodiment of the present invention. In step S710, the controller may generate a plurality of control signals to control the transmission conduction of the multiple channels of the multiplexer. In step S720, the controller may generate a driving capability adjustment signal according to the control signal. In step S730, the source driver may adjust the signal according to the driving capability to adjust the driving capability of the source driving signal.

Regarding the implementation details of the above steps, they have been described in detail in the foregoing embodiments, and will not be repeated here.

In summary, the display device of the present invention can use the controller to provide a driving capability adjustment signal to the source driver according to the conduction number of the transmission channel, so that the source driver can determine each amplifier circuit according to the driving capability adjustment signal. The number of enable signals needed to adjust the drive capability of the source drive signal. In this way, the display device of the embodiment of the present invention can effectively reduce the problem of uneven charging rate of each corresponding display pixel due to insufficient driving capability of the source driving signal, thereby improving the working efficiency of the display device.

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

100A, 100B‧‧‧ display device

110‧‧‧controller

111‧‧‧ Lookup Table

120‧‧‧Source Driver

130, 250‧‧‧ Voltage Shifter

210‧‧‧Control logic circuit

220‧‧‧Logic Circuit

230‧‧‧Control logic circuit

240‧‧‧Register

A1 ～ A3, ST‧‧‧thrust

AP1 ～ APB‧‧‧amplifier circuit

CH1 ～ CHA‧‧‧Transmission Channel

CS1 ～ CS3‧‧‧Control signals

CLK‧‧‧ timing control signal

DC1 ～ DCN‧‧‧Drive circuit

DCS, DCS1, DCS2‧‧‧ drive capacity adjustment signal

MUX2_1 ～ MUX2_N, MUX3_1 ～ MUX3_2‧‧‧Multiplexer

S1 ～ SN‧‧‧Source drive signal

SL1 ～ SLN‧‧‧Data Line

VS‧‧‧Image signal

Ts‧‧‧ Display time interval

T1 ～ T6‧‧‧‧Time interval

XSTB‧‧‧ Acquisition signal

XCLK‧‧‧ Inverted timing control signal

S710 ～ S730‧‧‧ Adjustment steps

FIG. 1A is a schematic diagram illustrating a display device according to an embodiment of the invention. FIG. 1B is a schematic diagram illustrating a display device according to another embodiment of the present invention. FIG. 2 is a schematic diagram illustrating a controller and a source driver according to the embodiment of FIG. 1B of the present invention. FIG. 3 is a timing diagram illustrating a display device according to the embodiment of FIG. 1A of the present invention. FIG. 4 is a timing diagram illustrating a display device according to the embodiment of FIG. 1B of the present invention. FIG. 5 is a schematic diagram illustrating a controller and a source driver according to another embodiment of FIG. 2 of the present invention. FIG. 6 is a schematic diagram illustrating a lookup table according to an embodiment of the present invention. FIG. 7 is a method for adjusting a driving capability of a display device according to an embodiment of the present invention.

Claims (15)

A display device includes: a plurality of multiplexers, each of which has a plurality of transmission channels; a controller, which generates a plurality of control signals to control the transmission conduction of the channels of each of the multiplexers, The controller generates a driving capability adjustment signal according to the control signals; and a source driver is coupled to the controller. The source driver generates multiple source driving signals and adjusts the signals to adjust according to the driving capability. The driving capability of the source driving signals, wherein adjusting the driving capability of the source driving signals includes adjusting a driving current of the source driver according to a charging state of a plurality of pixels in the display device. The display device according to item 1 of the scope of patent application, wherein the controller generates the driving capability adjustment signal according to the conduction number of the transmission channels of each multiplexer. The display device according to item 2 of the patent application scope, wherein the controller sends a timing control signal to the source driver, and the source driver controls the switching timing of the driving capability adjustment signal according to the timing control signal. The display device according to item 1 of the scope of patent application, wherein the number of the transmission channels of each multiplexer is 2 or 3. The display device according to item 1 of the scope of patent application, wherein the controller includes: a logic circuit that receives the control signals and performs logical operations on the control signals to generate the driving capability adjustment signal. The display device according to item 1 of the scope of patent application, further comprising: a lookup table, which records the relationship between the control signals and the driving capability adjustment signal, and the controller passes the lookup table according to the control signals. To generate the driving capability adjustment signal. The display device according to item 1 of the patent application scope, wherein the source driver includes a plurality of driving circuits, and the driving circuits generate the source driving signals respectively. The display device according to item 7 of the scope of the patent application, wherein each of the driving circuits includes: a plurality of amplifier circuits, which are coupled in parallel to each other and collectively generate each of the source driving signals, and the number of enabled amplifier circuits is positively related The signal is adjusted based on the driving capability. The display device according to item 8 of the scope of patent application, wherein the enabled number of the amplifier circuits is positively related to the transmission conduction number of the channels of each of the multiplexers. A driving capacity adjustment method is applied to a display device. The display device includes a source driver and generates multiple source driving signals. The adjustment method includes: generating a plurality of control signals to control a plurality of multiplexers respectively. Whether the transmission channel is conductive or not; generating a driving capability adjustment signal according to the control signals; and adjusting the driving capability of the source driving signals according to the driving capability adjustment signal, wherein the driving of the source driving signals is adjusted The capability includes adjusting a driving current of the source driver according to a charging state of a plurality of pixels in the display device. The adjusting method according to item 10 of the scope of patent application, wherein the step of generating the driving capability adjustment signal according to the control signals includes: generating the driving capability adjustment signal according to the conduction number of the transmission channels of the multiplexer. . The adjustment method as described in item 10 of the scope of patent application, wherein the number of transmission conductions of the channels of the multiplexer is positively related to the driving capability of the source driving signals. The adjusting method according to item 10 of the scope of patent application, further comprising: controlling a switching timing of the driving capability adjustment signal according to a timing control signal. The adjustment method according to item 10 of the scope of patent application, wherein the step of generating the driving capability adjustment signal according to the control signals includes: performing an AND operation on the control signals to generate the driving capability adjustment signal. The adjustment method according to item 10 of the scope of patent application, wherein the step of generating the driving capability adjustment signal according to the control signals includes: providing a lookup table to record a relationship between the control signals and the driving capability adjustment signal; and Generate the driving capability adjustment signal according to the lookup table and the control signals.