TW201913617A - Display Panel And Driving Method Thereof - Google Patents

Abstract

A driving method of a display panel includes comparing a gray-level data corresponding to a current display unit to a gray-level data corresponding to a previous display unit which is connected to the same data line with the current display unit, not outputting the gray-level data corresponding to the current display unit when the gray-level data corresponding to the current display unit is the same as the gray-level data corresponding to the previous display unit, and outputting the gray-level data corresponding to the current display unit when the gray-level data corresponding to the current display unit is different from the gray-level data corresponding to the previous display unit.

Description

Display panel and driving method thereof

The present invention relates to display driving technology, and more particularly to a display panel and a driving method thereof.

In recent years, environmental awareness has gradually risen, and energy conservation and carbon reduction have become important issues at present. Therefore, in addition to improving the display quality and display technology of display panels, various manufacturers pay considerable attention to the energy saving of display panels.

Conventionally, the display panel may include a plurality of display units, a plurality of scan lines, a plurality of data lines, a gate drive circuit, and a source drive circuit. The plurality of display units are arranged in a matrix pattern, and each of the display units is coupled to one of the plurality of scan lines and one of the plurality of data lines. The gate driving circuit is coupled to the plurality of scan lines, and the source driving circuit is coupled to the plurality of data lines.

In the driving method of the conventional display panel, the gate driving circuit can sequentially output the scanning signals to the scanning lines to enable each display unit column by column, and in the scanning period in which the scanning signals are applied to the corresponding scanning lines, the source The pole driving circuit can sequentially output the corresponding display voltage to each data line according to the current complex gray scale data, so that each display unit coupled to the same scanning line can be sequentially ordered according to the display voltage of the data line coupled thereto Display is performed to complete the screen display of the display panel.

Therefore, in the driving method of the conventional display panel, the source driving circuit needs to re-update the output display voltage according to the complex gray scale data corresponding to each scanning period during the scanning period in which each scanning signal is applied to the corresponding scanning line. To each display unit.

In one embodiment, a display panel for displaying a frame of a frame according to a plurality of grayscale data includes a plurality of data lines, a plurality of display units, a driving circuit, and a control unit. Each display unit is coupled to one of the plurality of data lines, and the plurality of display units respectively correspond to the plurality of gray scale data. The driving circuit is coupled to the plurality of data lines. The control unit is configured to compare whether the grayscale data corresponding to the current display unit and the grayscale data corresponding to the previous display unit coupled to the same data line are the same. When the grayscale data corresponding to the current display unit is the same as the grayscale data corresponding to the previous display unit of the same data line, the control unit causes the driving circuit not to output the display voltage corresponding to the grayscale data to the data line. When the gray scale data corresponding to the current display unit is different from the gray scale data corresponding to the previous display unit coupled to the same data line, the control unit causes the driving circuit to output the display voltage corresponding to the gray scale data to the data line.

In an embodiment, a driving method for driving a display panel for displaying a frame of a plurality of display units according to a plurality of gray scale data includes comparing gray scale data corresponding to the current display unit and the previous one coupled to the same data line The gray level data corresponding to the display unit is the same. When the gray level data corresponding to the current display unit is the same as the gray level data corresponding to the previous display unit of the same data line, the gray corresponding to the current display unit is not output. The gray level data corresponding to the current display unit is output when the gray level data corresponding to the current display unit is different from the gray level data corresponding to the previous display unit coupled to the same data line. The display unit is coupled to one of the plurality of data lines, and the plurality of gray scale data respectively correspond to the plurality of display units.

In summary, the display panel and the driving method thereof according to the embodiment of the present invention compare whether the grayscale data corresponding to the current display unit coupled to the same data line is the same as the grayscale data corresponding to the previous display unit. To determine whether to output the display voltage corresponding to the gray scale data corresponding to the current display unit to the data line for updating, to reduce the overall power consumption.

The detailed features and advantages of the present invention are described in detail in the embodiments of the present invention. The objects and advantages associated with the present invention can be readily understood by those skilled in the art.

1 is a schematic diagram of an embodiment of a display panel. Referring to FIG. 1 , the display panel 100 includes a plurality of data lines L11-L1x, a plurality of display units U11-Uxy, a driving circuit 110, and a control unit 120. Where x and y are positive integers greater than one. In addition, the display panel 100 further includes a plurality of scanning lines L21-L2y and a driving circuit 130.

The plurality of display units U11-Uxy are arranged in an array pattern into a pixel array, and each display unit U11-Uxy is coupled to one of the plurality of data lines L11-L1x and one of the plurality of scan lines L21-L2y. The driving circuit 110 can be referred to as a source driving circuit 110, and the source driving circuit 110 is coupled to the plurality of data lines L11-L1x. The driving circuit 130 can be referred to as a gate driving circuit 130, and the gate driving circuit 130 is coupled to the plurality of scanning lines L21-L2y. The control unit 120 is coupled to the source driving circuit 110 and the gate driving circuit 130.

In an embodiment, the control unit 120, the source driving circuit 110 and the gate driving circuit 130 may be combined into one driving device 140. In some embodiments, the driving device 140 can be a driving chip, and the control unit 120, the source driving circuit 110, and the gate driving circuit 130 can be integrated into the driving wafer through the integrated process technology. However, the invention is not limited thereto. In another embodiment, the driving device 140 can also be composed of the control unit 120 and the source driving circuit 110, and the gate driving circuit 130 can be directly formed on the display through GOA (Gate On Array) technology. On the array substrate of the panel 100.

In some embodiments, the pixel array formed by the plurality of display units U11-Uxy may have a dot inversion, a row inversion, a column inversion, and a frame inversion. The mode is rotated to drive, but the invention is not limited thereto.

The gate driving circuit 130 is configured to generate a plurality of gate driving signals G1-Gy. The source driving circuit 110 is configured to receive and generate a complex display voltage according to the complex gray scale data D11-Dxy. Here, each gray scale data D11-Dxy corresponds to one of the plurality of display units U11-Uxy in a one-to-one manner.

The control unit 120 can be used to generate the clock signal required by the gate driving circuit 130 to start the gate driving circuit 130 to sequentially generate the gate driving signals G1-Gy to the scanning lines L21-L2y. The control unit 120 is further configured to generate the complex grayscale data D11-Dxy to the source driving circuit 110 in each frame operation of the display panel 100, and touch the source driving circuit 110 to convert the complex grayscale data D11-Dxy into corresponding The complex number shows the voltage.

In addition, the control unit 120 can cause the source driving circuit 110 to output all or part of the complex display voltage corresponding to the scanning period to the scanning period of each gate driving signal G1-Gy according to the driving method of any embodiment of the present invention. Corresponding data lines L11-L1x are used to update the voltages on all or part of the data lines L11-L1x, or cause the source driving circuit 110 not to output corresponding to the scanning period during the scanning period of each of the gate driving signals G1-Gy. All or part of the complex number display voltage to the corresponding data line L11-L1y so as not to update the voltage on all or part of the data line L11-L1y.

2 is a schematic flow chart of an embodiment of a driving method. Referring to FIG. 1 and FIG. 2, the display panel 100 can display a frame of a frame according to a driving method according to any embodiment of the present invention, and the display panel 100 can achieve a plurality of frames by repeatedly performing the driving method of any embodiment. display. Hereinafter, an embodiment in which the display voltage corresponding to the nth display unit (that is, the display unit Unm) is output through the nth data line L1n during the scanning period of the gate driving signal Gm will be described. Where m is a positive integer greater than 1 and less than or equal to y, and n is a positive integer greater than or equal to 1 and less than or equal to x.

3 is a schematic diagram of an embodiment of a signal output of a source driving circuit during a previous scanning period, and FIG. 4 is a schematic diagram of an embodiment of a signal output of a source driving circuit during a current scanning period, and FIG. A schematic diagram of another embodiment of the signal output of the pole drive circuit during the current scan period. Please refer to Figure 2 to Figure 5.

The driving method includes comparing the grayscale data Dnm corresponding to the current display unit Unm with the grayscale data Dn corresponding to the previous display unit Un(m-1) coupled to the same data line L1n by using the control unit 120 of the display panel 100 ( M-1) Whether they are the same (step S10). After the control unit 120 determines that the gray scale data Dnm corresponding to the current display unit Unm is the same as the gray scale data Dn(m-1) corresponding to the previous display unit Un(m-1), the control unit 120 may cause the source. The pole driving circuit 110 does not output the display voltage Vnm corresponding to the gray scale data Dnm to the data line L1n coupled to the current display unit Unm (step S20) (as shown in FIG. 4), so as not to update the voltage on the data line L1n. . Moreover, when the control unit 120 determines that the grayscale data Dnm corresponding to the current display unit Unm is different from the grayscale data Dn(m-1) corresponding to the previous display unit Un(m-1), the control unit 120 may cause the source The pole driving circuit 110 outputs the display voltage Vnm corresponding to the gray scale data Dnm to the data line L1n coupled to the current display unit Unm (step S30) (as shown in FIG. 5) to update the voltage on the data line L1n.

Here, it should be noted that in FIG. 3 to FIG. 5, only the signal output of the source driving circuit 110 on the data line L1n is depicted, and the signal output of the source driving circuit 110 on the remaining data lines is not depicted. However, it does not mean that the source driving circuit 110 has no output signal on the remaining data lines, and the source driving circuit 110 outputs the display voltage on the remaining data lines, corresponding to the current display unit to which the data lines are coupled. Whether the gray scale data is the same as the gray scale data corresponding to the previous display unit.

In one embodiment, when the gate driving circuit 130 sequentially outputs the gate driving signals G1-Gy in a positive scanning manner (ie, from the scanning line L21 to the scanning line L2y), the previous display unit is The display unit Un(m-1) is coupled to the data line L2(m-1) and controlled by the gate drive signal G(m-1). When the gate driving circuit 130 sequentially outputs the gate driving signal Gy-G1 in the reverse scanning mode (ie, from the scanning line L2y to the scanning line L21), the previous display unit is coupled to the data. The line L2(m+1) is controlled by the display unit Un(m+1) of the gate driving signal G(m+1).

In an embodiment, the current display unit Unm is coupled to the scan line L2m and can be enabled or disabled according to the gate drive signal Gm. The former display unit Un(m-1) is coupled to the scan line L2(m-1) and can be enabled or disabled according to the gate drive signal G(m-1). The time point at which the signal of the gate driving signal G(m-1) rises is earlier than the time when the rising edge of the signal of the gate driving signal Gm. Therefore, the display actuation of the previous display unit Un(m-1) is earlier than the display operation of the current display unit Unm.

In some embodiments, the grayscale data D11-Dxy may be an 8-bit digital code expressed in binary, and the 8-bit digital code may be used to represent a certain order of the image grayscale divided into 256 steps, but The invention is not limited thereto.

In an embodiment of step S10, the control unit 120 compares the bit codes of the gray-scale data Dnm with the bit codes of the gray-scale data Dn(m-1) one by one, and when each element of the gray-scale data Dnm When the code is identical to each bit code of the gray scale data Dn(m-1), the control unit 120 determines that the gray scale data Dnm is the same as the gray scale data Dn(m-1). For example, if the gray scale data Dnm is [00010100] and the gray scale data Dn(m-1) is [00010100], the control unit 120 may determine that the gray scale data Dnm is the same as the gray scale data Dn(m-1). And proceeding to step S20, and if the grayscale data Dnm is [00010100] and the grayscale data Dn(m-1) is [00010101], the control unit 120 determines that the grayscale data Dnm is different from the grayscale data Dn ( M-1), and then step S30 is performed. However, the invention is not limited thereto.

In another embodiment, the control unit 120 compares the magnitude of the numerical value represented by the grayscale data Dnm with the numerical value represented by the grayscale data Dn(m-1), and when the grayscale data Dnm is numerically and grayscaled. When the difference between the values of the data Dn(m-1) does not exceed a certain value, the control unit 120 may determine that the gray scale data Dnm is the same as the gray scale data Dn(m-1). For example, suppose a certain value is 2, the gray-scale data Dnm is [00010100], and the gray-scale data Dn(m-1) is [00010101], and the gray-scale data Dnm represents a value of 20, and the gray scale The value represented by the data Dn(m-1) is 21, and since the difference between the value of the gray scale data Dnm and the value of the gray scale data Dn(m-1) is 1, the control unit 120 can determine the gray scale data Dnm. Same as the gray scale data Dn(m-1), and then step S20 is performed. On the other hand, if the gray-scale data Dnm is [00010100] and the gray-scale data Dn(m-1) is [00010111], the gray-scale data Dnm represents a value of 20 and the gray-scale data Dn(m-1) represents The value is 23, and since the difference between the value of the gray scale data Dnm and the value of the gray scale data Dn(m-1) is 3, the control unit 120 can determine that the gray scale data Dnm is different from the gray scale data Dn ( M-1), and then step S30 is performed.

In an embodiment of step S20, when the comparison result of the control unit 120 is that the gray scale data Dnm is the same as the gray scale data Dn(m-1), the source indicating the moment (ie, during the scanning period of the gate driving signal Gm) is indicated. The display voltage Vnm required to be output by the pole drive circuit 110 is substantially the same as the display voltage Vn(m-1) outputted from the previous moment (ie, during the scan period of the gate drive signal G(m-1)), thus, for example, As shown in FIG. 4, the control unit 120 can output the disable signal SD to the source driving circuit 110 such that the source driving circuit 110 does not output the display voltage Vnm corresponding to the gray scale data Dnm to the data line L1n.

Since the source driving circuit 110 has outputted the display voltage Vn(m-1) to the data line L1n during the scanning period of the gate driving signal G(m-1) at the previous moment, and the display voltage Vn(m-1) In addition to charging the display unit Un(m-1) coupled to the data line L1n, the parasitic capacitance on the data line L1n is also simultaneously applied (for example, between the data line L1n and the scan line, the data line L1n, and the adjacent data). The parasitic capacitance between the lines is charged, so that the amount of electric power corresponding to the display voltage Vn(m-1) can be stored on the data line L1n due to the storage of the parasitic capacitance. Therefore, after the step S20 is performed, although the source driving circuit 110 does not output the display voltage Vnm to the data line L1n, the display unit Unm can be driven by the gate driving signal Gm according to the parasitic capacitance on the data line L1n. The stored power is charged and displayed.

Therefore, when the gray scale data Dnm corresponding to the current display unit Unm is the same as the gray scale data Dn(m-1) corresponding to the previous display unit Un(m-1), the display panel 100 can be driven by the source. The circuit 110 does not output the display voltage Vnm to the data line L1n to reduce its power consumption for power saving purposes.

In an embodiment of step S30, when the comparison result of the control unit 120 is that the grayscale data Dnm is different from the grayscale data Dn(m-1), it indicates the moment (ie, during the scanning period of the gate driving signal Gm) The display voltage Vnm required for the output of the source driving circuit 110 is not the same as the display voltage Vn(m-1) outputted at the previous moment (that is, during the scanning period of the gate driving signal G(m-1)), As shown in FIG. 5, the control unit 120 needs to output the enable signal SE to the source driving circuit 110, so that the source driving circuit 110 outputs the display voltage Vnm corresponding to the grayscale data Dnm to the data line L1n to The voltage on line L1n is updated to display voltage Vnm.

FIG. 6 is a schematic flow chart of an embodiment of step S20 of FIG. Referring to FIG. 2 to FIG. 4 and FIG. 6, in an embodiment of step S20, the control unit 120 may generate the disable signal SD according to the comparison result in step S10 (step S21), and perform iSP on the grayscale data Dnm. Encoding (step S22). Thereafter, the control unit 120 may combine the grayscale data Dnm and the disable signal SD encoded by the iSP into one data packet Pnm (step S23), and then output the data packet Pnm to the source driving circuit 110 (step S24).

In an embodiment of step S21, the disable signal SD can be represented by a one-digit number. Here, the disable signal SD is represented by the numeral [0], but the present invention is not limited thereto. In another embodiment, the disable signal SD may also be represented by the numeral [1].

In an embodiment of step S22, the iSP encoding process may include: (1) when the lowest bit of the grayscale data Dnm is 0, the first bit (LSB) of the grayscale data Dnm is padded with 1, and ( 2) When the lowest bit of the gray scale data Dnm is 1, the first bit is added to the lowermost bit of the gray scale data Dnm. Therefore, the number of bits of the gray scale data Dnm encoded by the iSP will be increased by 1 bit, and the added bit is 1 or 0 depending on the lowest bit of the original gray scale data Dnm.

For example, the original gray-scale data Dnm can be [00001010] a total of 8 bits. Since the lowest bit of the original gray-scale data Dnm is 0, it can be added to the lowest bit of the original gray-scale data Dnm in the iSP encoding. 1. The gray scale data Dnm encoded by the iSP is changed to [000010101] a total of 9 bits. Or, the original gray-scale data Dnm can be [00000101] a total of 8 bits, because the lowest bit of the original gray-scale data Dnm is 1, so in the iSP encoding can be added to the lowest bit of the original gray-scale data Dnm 0 Therefore, the gray scale data Dnm encoded by the iSP is changed to [000001010] a total of 9 bits. However, the invention is not limited thereto.

In an embodiment of step S23, if the grayscale data Dnm encoded by the iSP is [000101001] and the disable signal SD is [0], the control unit 120 may combine the disable signal SD with the iSP encoded code. The data packet Pnm is formed after the gray scale data Dnm, so that the data packet Pnm output to the source driving circuit 110 can be [0001010010]. However, the present invention is not limited thereto. In another embodiment of step S23, the control unit 120 may also combine the disable signal SD with the iSP encoded gray scale data Dnm to form a data packet Pnm, so that the output is output to the source. The data packet Pnm of the pole drive circuit 110 can be [0000101001].

FIG. 7 is a schematic flow chart of an embodiment of step S30 in FIG. Referring to FIG. 2, FIG. 3, FIG. 5 and FIG. 7, in an embodiment of step S30, the control unit 120 may generate the enable signal SE according to the comparison result in step S10 (step S31), and the grayscale data. Dnm performs iSP encoding (step S32). Thereafter, the control unit 120 may combine the grayscale data Dnm and the disable signal SD encoded by the iSP into one data packet Pnm (step S33), and then output the data packet Pnm to the source driving circuit 110 (step S34).

In an embodiment of step S31, the enable signal SE can be represented by a one-digit number. Here, the enabling signal SE is represented by the numeral [1], but the present invention is not limited thereto. In another embodiment, the enabling signal SE may also be represented by the numeral [0].

Step S32 is substantially the same as step S22, and thus will not be described again.

In an embodiment of step S33, if the iSP encoded grayscale data Dnm is [000101001] and the enable signal SE is [1], the control unit 120 may combine the enable signal SE with the iSP encoded code. The data packet Pnm is formed after the gray scale data Dnm, so that the data packet Pnm output to the source driving circuit 110 can be [0001010011]. However, the present invention is not limited thereto. In another embodiment of step S33, the control unit 120 may also combine the enable signal SE with the iSP encoded gray scale data Dnm to form a data packet Pnm, so that the output is output to the source. The data packet Pnm of the pole drive circuit 110 can be [1000101001].

Figure 8 is a block diagram of one embodiment of a source driver circuit. Referring to FIG. 1 and FIG. 8, the source driving circuit 110 is configured to receive the plurality of data packets P11-Pxy, and convert the corresponding display voltage according to each data packet P11-Pxy. In an embodiment, the source driver circuit 110 can include a complex conversion unit 1111-111x and a plurality of switch modules 1121-112x. The complex conversion units 1111-111x are coupled to the control unit 120. The plurality of switch modules 1121-112x are respectively coupled between one of the complex conversion units 1111-111x and one of the plurality of data lines L11-L1x. Here, each of the switch modules 1121-112x can be used to control the electrical connection between the coupled conversion units 1111-111x and the data lines L11-L1x.

The source driving circuit 110 receives a plurality of packets corresponding to the scanning period from the control unit 120 during the scanning period of each of the gate driving signals G1-Gy. The conversion units 1111-111x of the source driving circuit 110 are configured to generate corresponding display voltages according to the grayscale data portions in the corresponding data packets, and the switch modules 1121-112y of the source driving circuit 110 are used according to The disable signal SD in the corresponding data packet disconnects the connection path between the conversion unit and the data line, or turns on the connection path between the conversion unit and the data line according to the enable signal SE in the corresponding data package.

Referring to FIG. 2 to FIG. 4, FIG. 6 and FIG. 8, in an embodiment of step S20, after receiving the data packet Pnm, the source driving circuit 110 may first decode the data packet Pnm to obtain the grayscale data Dnm. With the disable signal SD. After that, the source driving circuit 110 can convert the gray scale data Dnm to the corresponding display voltage Vnm by using the converting unit 111n (step S25), and disconnect the switching unit 111n and the data line L1n according to the disable signal SD by the switch module 112n. The connection path is such that the display voltage Vnm generated by the conversion unit 111n cannot be output to the data line L1n via the switch module 112n to update the voltage (step S26).

Similarly, in an embodiment of step S30, after receiving the data packet Pnm, the source driving circuit 110 may first decode the data packet Pnm to obtain the grayscale data Dnm and the enable signal SE. After that, the source driving circuit 110 can convert the gray scale data Dnm to the corresponding display voltage Vnm by using the converting unit 111n (step S35), and turn on between the converting unit 111n and the data line L1n according to the enabling signal SE by the switching module 112n. The path is connected such that the display voltage Vnm generated by the conversion unit 111n can be output to the data line L1n via the switch module 112n to update the voltage (step S36).

In some embodiments, each of the conversion units 1111-111x can be implemented with a digital analog converter, such as a resistor string digital analog converter (R-DAC). Each of the switch modules 1121-112x can be implemented by one or more transistors.

Therefore, after the step S20, the control unit 120 can drive the gate driving circuit 130 to output the gate driving signal Gm to the scanning line L2m, so that the display unit Unm coupled to the scanning line L2m starts to be based on the parasitic capacitance on the data line L1n. The amount of electricity stored at one moment is charged and displayed (step S41). After the step S30, the control unit 120 can drive the gate driving circuit 130 to output the gate driving signal Gm to the scanning line L2m, so that the display unit Unm coupled to the scanning line L2m starts to be transmitted through the display voltage Vnm on the data line L1n. Charging and display (step S42).

FIG. 9 is a schematic flow chart of another embodiment of step S20 of FIG. 2. Referring to FIG. 2 to FIG. 9 , in an embodiment of step S20 , the control unit 120 can accumulate the amount of power stored by the source driving circuit 110 using the parasitic capacitance on the data line L1n at the previous moment to be coupled to the data line L1n. The other consecutive display units, such as the display unit Unm, the display unit Un(m+1), and the like, perform the number of times of recharging (step S27). The number of times of repeated use is the number of times the source driving circuit 110 does not output the display voltage Vnm to the data line L1n.

When the number of reuses does not reach a threshold, step S21 to step S26 are successively performed so as not to output the display voltage Vnm corresponding to the gray scale data Dnm corresponding to the current display unit Unm to the data line L1n. In some embodiments, the threshold can be three times, that is, the parasitic capacitance on the data line L1n can be stored up to the last two display units coupled to the data line L1n, for example, The display units Unm and Un(m+1) are charged (if the gray scale data corresponding to the two display units Unm and Un(m+1) are the same as the previous display unit Un(m-1) Gray scale data), but the invention is not limited thereto, and the threshold value can be set according to the display quality required by the display panel 110.

When the number of reuses reaches the threshold, the control unit 120 resets the number of reuses (step S28), and jumps to step S30 to output a display voltage Vnm corresponding to the gray scale data Dnm corresponding to the current display unit Unm. On the data line L1n. For example, suppose the threshold is 3 times, and the gray scale data Dnm, Dn(m+1), Dn(m+2) corresponding to the display units Unm, Un(m+1), Un(m+2) The gray level data Dn(m-1) corresponding to the display unit Un(m-1) is the same, and the control unit 120 can perform step S20 in the scanning period of the gate driving signals Gm, G(m+1). Step S41 is such that the source driving circuit 110 does not output the display voltage corresponding to the gray scale data Dnm, Dn(m+1) onto the data line L1n, but during the scanning period of the gate driving signal G(m+2), Since the number of times of reuse has reached the threshold, the control unit 120 performs step S30 to cause the source driving circuit 110 to output a display voltage corresponding to the gray scale data Dn(m+2) onto the data line L1n to update the voltage.

In summary, the display panel and the driving method thereof according to the embodiment of the present invention compare whether the grayscale data corresponding to the current display unit coupled to the same data line is the same as the grayscale data corresponding to the previous display unit. To determine whether to output the display voltage corresponding to the gray scale data corresponding to the current display unit to the data line for updating, to reduce the overall power consumption.

Although the technical content of the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any modifications and refinements made by those skilled in the art without departing from the spirit of the present invention are encompassed by the present invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.

100‧‧‧ display panel

110‧‧‧Source drive circuit

1111-111x‧‧‧ conversion unit

1121-112x‧‧‧Switch Module

120‧‧‧Control unit

130‧‧ ‧ gate drive circuit

D11-Dxy‧‧‧ grayscale data

G1-Gy‧‧‧ gate drive signal

L11-L1x‧‧‧ data line

L21-L2y‧‧‧ scan line

P11-Pxy‧‧‧Package

SD‧‧‧ disable signal

SE‧‧‧Enable signal

U11-Uxy‧‧‧ display unit

S10-S42‧‧‧Steps

140‧‧‧ drive

Vn(m-1)‧‧‧ display voltage

Vnm‧‧‧ display voltage

1 is a schematic diagram of an embodiment of a display panel. 2 is a schematic flow chart of an embodiment of a driving method. 3 is a schematic diagram of an embodiment of a signal output of a source drive circuit during a previous scan period. 4 is a schematic diagram of an embodiment of a signal output of a source drive circuit during a current scan period. 5 is a schematic diagram of another embodiment of signal output by a source driver circuit during a current scan period. FIG. 6 is a schematic flow chart of an embodiment of step S20 of FIG. FIG. 7 is a schematic flow chart of an embodiment of step S30 in FIG. Figure 8 is a block diagram of one embodiment of a source driver circuit. FIG. 9 is a schematic flow chart of another embodiment of step S20 of FIG. 2.

Claims (9)

A display panel driving method is configured to drive a plurality of display units to display a frame of a frame according to the plurality of gray scale data, wherein each of the display units is coupled to one of the plurality of data lines, wherein the plurality of gray scale data respectively correspond to the plurality of data lines a display unit, the driving method includes: comparing whether the grayscale data corresponding to the current display unit is the same as the grayscale data corresponding to the previous display unit coupled to the same data line; When the gray scale data is the same as the gray scale data corresponding to the previous display unit of the same data line, the display voltage corresponding to the gray scale data corresponding to the current display unit is not output; When the gray scale data corresponding to the display unit is different from the gray scale data corresponding to the previous display unit of the same data line, the output corresponding to the gray scale data corresponding to the current display unit is output. Display voltage. The driving method of the display panel of claim 1, wherein the step of not outputting the display voltage corresponding to the grayscale data corresponding to the current display unit comprises: converting the grayscale data to the display voltage; and generating one The switch signal is disabled to a switch module, so that the display voltage cannot be output to the data line to which the display unit is currently coupled via the switch module. The driving method of the display panel of claim 2, wherein the step of outputting the display voltage corresponding to the grayscale data corresponding to the current display unit comprises: converting the grayscale data to the display voltage; and generating uniform energy The signal is sent to the switch module, so that the display voltage is output to the data line to which the display unit is currently coupled via the switch module. The driving method of the display panel of claim 1, wherein the step of not outputting the display voltage corresponding to the grayscale material corresponding to the current display unit comprises: accumulating a number of reuses of the data line; When the number of uses does not reach a threshold, the display voltage corresponding to the gray scale data corresponding to the current display unit is not output; when the repeated use times reaches the threshold, the execution output corresponds to the current display unit The step of displaying the voltage of the grayscale data; and resetting the number of reuses. A display panel is configured to display a frame of a frame according to the plurality of grayscale data, the display panel includes: a plurality of data lines; a plurality of display units, each of the display units being coupled to one of the plurality of data lines, the plurality of display The unit respectively corresponds to the plurality of gray scale data; a driving circuit coupled to the plurality of data lines; and a control unit that compares the current gray level data corresponding to the display unit with the front of the same data line Whether the grayscale data corresponding to the display unit is the same, wherein the grayscale data corresponding to the current display unit is the same as the grayscale data corresponding to the previous display unit of the same data line. The control unit causes the driving circuit not to output a display voltage corresponding to the gray scale data to the data line, and the gray scale data corresponding to the current display unit is different from the previous display coupled to the same data line When the unit corresponds to the gray scale data, the control unit causes the driving circuit to output the display voltage corresponding to the gray scale data to the data line. The display panel of claim 5, wherein the driving circuit comprises: a plurality of converting units respectively generating corresponding display voltages according to the gray scale data; and a plurality of switching modules respectively coupled to the plurality of converting units And one of the plurality of data lines, each of the switch modules disconnects a connection path between the conversion unit and the data line according to a disable signal output by the control unit, so that the gray scale data is The corresponding display voltage cannot be output to the data line to which the display unit is currently coupled via the switch module, or the connection path between the conversion unit and the data line is turned on according to the consistent energy signal output by the control unit. So that the gray scale data is output to the data line to which the display unit is currently coupled via the switch module. The display panel of claim 5, wherein the grayscale data corresponding to the current display unit is the same as the grayscale data corresponding to the previous display unit of the same data line, Accumulating a number of reuses of the data line, wherein the control unit is that the number of reuses does not reach a threshold value, so that the driving circuit does not output the display voltage corresponding to the gray scale data to the data line, and the repeating When the number of uses reaches the threshold, the driving circuit outputs the display voltage corresponding to the gray scale data to the data line and resets the number of reuses. The display panel of claim 6, wherein each of the grayscale data is formed using iSP encoding. The display panel of claim 8, wherein the control unit combines the grayscale data with the disable signal or the enable signal corresponding to the comparison result into a data packet, and then outputs the data packet to the driving circuit. .