TWI567721B - Source driver and lcd display using the same - Google Patents

Description

Source driver and liquid crystal display device

The present invention relates to a source driver and a liquid crystal display device, and more particularly to a source driver and a liquid crystal display device that maintain a display quality by alternately using a buffer amplifier through a cycle.

Please refer to FIG. 1 , which is a schematic diagram of a prior art Thin Film Transistor (TFT) liquid crystal display 10 . The liquid crystal display 10 includes a liquid crystal display panel (LCD panel) 100, a source driver 102, and a gate driver 104. The liquid crystal display panel 100 is composed of two substrates, and a liquid crystal material (LCD layer) is filled between the two substrates. A substrate is provided with a plurality of data lines 108, a plurality of scan lines perpendicular to the data lines 108 (Scan Line, or Gate Line) 110, and a plurality of thin film transistors 112, and another A common electrode (Common Electrode) is disposed on the substrate for providing a common signal Vcom via the voltage generator 106. The thin film transistors 112 are distributed on the liquid crystal display panel 100 in a matrix, each data line 108 corresponds to one column on the liquid crystal display panel 100, and the scan line 110 corresponds to one column on the liquid crystal display panel 100 (Row) And each of the thin film transistors 112 corresponds to a pixel (Pixel). In addition, the circuit characteristics of the two substrates of the liquid crystal display panel 100 can be regarded as an equivalent capacitor 114.

The source driver 102 and the gate driver 104 respectively generate input signals for different data lines 108 and scan lines 110 according to one image data DAT to be controlled to control the conduction of the thin film transistor 112 and the cross-section of the equivalent capacitance 114. The pressure further changes the arrangement of the liquid crystal molecules and the corresponding amount of light penetration, so that the image data is correctly displayed on the liquid crystal display panel 100. In detail, the source driver 102 includes a plurality of analog-digital converters 103_1 to 103_N and a plurality of buffer amplifiers 105_1 to 105_N. The analog digital converters 103_1 to 103_N are used to convert the digital image data DAT into N analog signals A1 to AN. The buffer amplifiers 105_1 to 105_N amplify the analog signals A1 to AN as source drive signals S1 to SN.

Ideally, the input and output voltages of the buffer amplifiers 105_1 to 105_N are the same. However, in practice, the processes of the buffer amplifiers 105_1 105 105_N generate errors, resulting in slight errors in the output and input of each buffer amplifier. For example, please refer to FIG. 2 , which is a schematic diagram of the gray scales of four columns C1 to C4 pixels in the liquid crystal display panel 100 . In the second figure, the output of the buffer amplifier 105_2 is different from the other buffer amplifiers due to the process error, causing the voltage value of the source driving signal S2 to be incorrect. As a result, due to the incorrect driving voltage, a slight chromatic aberration occurs between the second line of pixels C2 and the other line pixels, resulting in a decrease in display quality of the liquid crystal display panel 100.

Therefore, solving the problem that the source driver is degraded due to process error has become one of the efforts of the industry.

Accordingly, it is a primary object of the present invention to provide a liquid crystal display device and a source driver.

The present invention discloses a liquid crystal display device comprising a liquid crystal display panel comprising: a plurality of pixel units; a gate driver electrically coupled to the plurality of pixel units for generating a plurality of scanning signals, each The scan signal is used to drive the pixel unit on one of the liquid crystal display panels; a voltage generator is electrically coupled to the substrate for providing a common signal to the substrate; and a source driver includes a plurality of Each of the rotation modules includes a plurality of digital analog converters, each digital analog converter is used to convert an image data into a type of analog signal; a plurality of buffer amplifiers, each of which is electrically coupled to the buffer amplifier a digital analog converter of the plurality of digital analog converters for amplifying the thrust of the analog signal to generate an amplifier output signal; and a plurality of first switches, each of the first switches being used for the plurality of image data And cyclically selecting to transmit one of the image data to one of the plurality of digital analog converters, or from the plurality of analog signals And cyclically selectively transmitting a type of analog signal to one of the plurality of buffer amplifiers; and a plurality of second switches, each of the second switches being electrically coupled to one of the plurality of buffer amplifiers and the buffer amplifier The liquid crystal display panel is configured to cyclically alternately select an amplifier output signal from the plurality of amplifier output signals as a source driving signal, and transmit the source driving signal to the plurality of pixel units.

The present invention further discloses a source driver for driving a liquid crystal display panel. The source driver includes a plurality of rotation modules, each of which includes a plurality of digital analog converters, and each digital analog converter Converting an image data into a type of analog signal; a plurality of buffer amplifiers, each buffer amplifier being electrically coupled to a digital analog converter of the plurality of digital analog converters for amplifying the thrust of the analog signal to generate a An amplifier output signal; a plurality of first switches, each of the first switches for cyclically selectively transmitting one of the image data to the digital analog converter of the plurality of digital analog converters from the plurality of image data, or From the plurality of analog signals, cyclically selectively transmitting a type of analog signal to one of the plurality of buffer amplifiers; and

a plurality of second switches, each of which is electrically coupled to one of the plurality of buffer amplifiers and the liquid crystal display panel for cyclically selecting an amplifier output from the plurality of amplifier output signals The signal acts as a source driving signal and transmits the source driving signal to the liquid crystal display panel.

According to the above embodiment, the present invention alternately uses the buffer amplifier through the cycle, thereby reducing the chromatic aberration caused by the error in the manufacturing process of the buffer amplifier to maintain the quality of the liquid crystal display.

Please refer to FIG. 3, which is a schematic diagram of a liquid crystal display device 30 according to an embodiment of the present invention. The liquid crystal display device 30 includes a liquid crystal display panel 32, a gate driver 300, a voltage generator 302, and a source driver 304. The liquid crystal display panel 32 includes N×M pixel units arranged in a matrix on a substrate. Each pixel unit can be equivalent to an equivalent capacitor 310, and a thin film transistor 308 controls the voltage across the terminals to display the correct gray scale. The gate driver 300 is configured to generate scan signals VG_1 VG VG_M to determine the update timing of the pixel units on each row of the liquid crystal display panel 32. The voltage generator 302 is configured to provide a common signal Vcom to the substrate of the liquid crystal display panel 32. The source driver 304 is configured to generate source driving signals VS_1 to VS_N according to the column image data DAT1 to DATN to drive the pixel units on the respective rows of the liquid crystal display panel 32. In detail, please refer to FIG. 4, which is a schematic diagram of the source driver 304. The source driver 304 includes the rotation modules 301_1 to 301_K. Taking the rotation module 301_1 as an example, the rotation module 301_1 includes digital analog converters 307_1 and 307_2, buffer amplifiers 305_1 and 305_2, first switches SW1_1 and SW1_2, and second switches SW2_1 and SW2_2. The digital analog converters 307_1 and 307_2 are used to convert the line image data DAT1 and DAT2 into analog signals A1 and A2. The buffer amplifiers 305_1, 305_2 are used to amplify the thrust of the analog signals A1, A2 to generate amplifier output signals B1, B2. The first switches SW1_1, SW1_2 are used to cyclically and alternately transmit the line image data DAT1, DAT2 to the digital analog converters 307_1, 307_2. The second switches SW2_1 and SW2_2 are used to cyclically and alternately select the amplifier output signals B1 and B2 as the source driving signals VS_1 and VS_2. The functions of other rotation modules can be deduced by analogy and will not be described here.

Specifically, please refer to FIG. 5A and FIG. 5B, and FIGS. 5A and 5B are schematic diagrams showing operations of the rotation modules 301_1 and 301_2. In FIG. 5A, the first switches SW1_1 to SW1_4 respectively select the transmission line image data DAT1 to DAT4 to the digital analog converters 307_1 to 307_4, and the second switches SW2_1 to SW2_4 respectively select the transmission amplifier output numbers B1 to B4 as the source driving signals. VS_1 ~ VS_4. It is assumed that the buffer amplifier 305_2 causes an output input error different from that of other buffer amplifiers due to process variation, causing a difference in color between the pixels on the second line of the liquid crystal display panel 32 and the surroundings. In FIG. 5B (at another time point), the first switches SW1_1 to SW1_4 respectively select the transmission line image data DAT2, DAT1, DAT4, DAT3 to the digital analog converters 307_1 to 307_4, and the second switches SW2_1 to SW2_4 respectively select the transmission amplifiers. The output signals B2, B1, B4, and B3 serve as source drive signals VS_1 to VS_4. In this case, the buffer amplifier 305_2 causes a pixel of the first line on the liquid crystal display panel 32 to cause chromatic aberration with the surroundings. The switching operations shown in FIGS. 5A and 5B are cyclically alternated, so that the pixels of the first row or the second row will cyclically appear chromatic aberration, and the viewer will not perceive the liquid crystal display panel 32 due to the persistence of human vision. The first and second rows of pixels appear chromatic aberration.

In other words, in order to solve the chromatic aberration caused by the buffer amplifier process error in the prior art, the source driver 304 continuously exchanges the buffer amplifiers for processing the line image data DAT1 to DATN through the two rows of switches. As a result, the pixels having the chromatic aberration will appear in a loop, and the viewer will not feel the chromatic aberration on the liquid crystal display panel 32 due to the persistence of the human vision.

It should be noted that before the positions of the first switches SW1_1 - SW1_N are not limited to the digital analog converters 307_1 - 307_N, the field can make adjustments according to actual needs. For example, please refer to FIG. 6. FIG. 6 is a schematic diagram of a liquid crystal display device 60 according to an embodiment of the present invention. The liquid crystal display device 60 is derived from the liquid crystal display device 30, and the same elements are denoted by the same reference numerals. The difference between the liquid crystal display device 60 and the liquid crystal display device 30 is that the first switches SW1_1 to SW1_N in one source driver 604 are located between the buffer amplifiers 305_1 to 305_N and the digital analog converters 307_1 to 307_N. Taking the first switch SW1_1 as an example, the first switch SW1_1 cyclically and alternately selects the transmission analog signals A1, A2 to the buffer amplifier 305_1. The first switches SW1_1 to SW1_N and the second switches SW2_1 to SW2_N of the liquid crystal display device 60 can be operated in accordance with the switching operation shown in FIGS. 5A and 5B, so that the pixel cycles in which chromatic aberration occurs alternately appear alternately, and are not described herein.

It should be noted that the color difference exhibited by the 5A and 5B images is a result when the liquid crystal display device 30 is driven by the column inversion method. If the liquid crystal display devices 30 and 60 are Dot Inversion, the chromatic aberration of the liquid crystal display panel 32 is as shown in Figs. 7A and 7B. Similarly, the chromatic aberration effects of the 7A and 7B images are alternately presented in a cycle, and the effect of letting the viewer not perceive the chromatic aberration through the persistence of human vision can also be achieved. In other words, the liquid crystal display devices 30, 60 of the present invention can be applied to various polarity inversion driving modes without being limited to row polarity inversion.

In the source drivers 304 and 604, the relationship between the buffer amplifiers 305_1 to 305_N corresponding to the source drive signals VS_1 to VS_N in each period can be arranged into the eighth diagram. In FIG. 8A, in a period T1, the buffer amplifiers 305_1 to 305_N are directly corresponding to the source driving signals VS_1 to VS_N, and in another period T2, the buffer amplifiers 305_1 to 305_N are one-to-one crossing corresponding to the source. The drive signals VS_1 VS VS_N, for example, the buffer amplifier 305_2 corresponds to the source drive signal VS_1 and the buffer amplifier 305_1 corresponds to the source drive signal VS_2. The source drivers 304 and 604 cyclically drive the liquid crystal display panel 32 in accordance with the timing of T1□T2□T1□T2.

In addition, please refer to FIG. 8B, which is a modified embodiment of FIG. 8A. In Fig. 8B, in a period T1', the buffer amplifiers 305_1 to 305_N directly correspond to the source driving signals VS_1 to VS_N. During a period of time T2', a dummy buffer amplifier 305_0 and buffer amplifiers 305_1 ～ 305_N-1 are one-to-one forward-wrong lines corresponding to the source drive signals VS_1 VS VS_N. During a period of time T3', the buffer amplifiers 305_2 to 305_N and a dummy buffer amplifier 305_N+1 are one-to-one negative-wrong lines corresponding to the source driving signals VS_1 to VS_N. The source driver cyclically drives the liquid crystal display panel 32 in accordance with the timing of T1'□T2'□T3'□T1'□T2'□T3'. In this case, if the buffer amplifier 305_2 is a buffer amplifier having a large deviation between the input and output, the pixels in which the chromatic aberration occurs will appear in the second row, the third row, and the first line of pixels of the liquid crystal display panel 32.

In other words, to implement the driving sequence of FIG. 8B, the source drivers 304, 604 must add virtual buffer amplifiers 305_0, 305_N+1 and virtual digital analog converters 307_0, 307_N+1, such as the source of FIG. Driver 904 is shown. The source driver 904 is an embodiment in which the first switches SW3_1 to SW3_N are located before the digital analog converters 307_1 to 307_N. The first switches SW3_1 to SW3_N may be provided between the digital analog converters 307_1 to 307_N and the buffer amplifiers 305_1 to 305_N as in the sixth embodiment, and will not be described here.

It should be noted that, in FIG. 9 , if the rotation of the modules 301_1 ～ 301_K is performed according to the fourth embodiment, the buffer amplifiers 305_0 ～ 305_N +1 and the corresponding digital analog converters, the first switch and the second switch may be used. The rotation modules 801_1 to 801_L are classified into three rows. For example, the rotation module 801_1 indicates that the buffer amplifiers 305_0 to 305_2 cyclically generate the source drive signal VS_1. The rotation modules 801_1 to 801_L share a common component. For example, the rotation modules 801_1 and 801_2 share the first switches SW3_1 and SW3_2, the digital analog converters 307_1 and 307_2, the buffer amplifiers 305_1 and 305_2, and the second switches SW4_1 and SW4_2.

In addition, the cross-correspondence relationship of FIG. 8A and the mismatched relationship of FIG. 8B can be further combined into a one-to-one cross misalignment relationship, as shown in FIG. In FIG. 10, in a period T1", the buffer amplifiers 305_1 ～ 305_N directly correspond to the source driving signals VS_1 VS VS_N. In a period T2", the buffer amplifiers 305_1 ～ 305_N are one-to-one cross corresponding to the source driving. Signal VS_1 ~ VS_N. During a period of time T3", the buffer amplifiers 305_0 to 305_N-1 are one-to-one, staggered, and cross-corresponding to the source driving signals VS_1 to VS_N. The source drivers are in accordance with T1"□T2"□T3"□T1"□T2 The timing cycle of "□T3"... drives the liquid crystal display panel 32.

As can be seen from the figures 8A, 8B, and 10, the present invention can extend the various rotation sequences by changing the relationship between the buffer amplifier and the source drive signals VS_1 VS VS_N through the first switch and the second switch. Regardless of the rotation order, as long as the source drive signals VS_1~VS_N are alternately generated by different buffer amplifier cycles, they can be persisted through human vision, so that the viewer does not perceive the chromatic aberration caused by the difference in the buffer amplifier process.

In summary, the present invention uses a buffer amplifier of a source driver alternately in a loop, even if the input and output errors of the buffer amplifier are different, the viewer will not perceive the chromatic aberration on the liquid crystal display panel due to the human visual persistence characteristic, and can maintain The viewing quality of the LCD display. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

10‧‧‧Thin-film transistor liquid crystal display
108‧‧‧Information line
110‧‧‧ scan line
30, 60‧‧‧ liquid crystal display device
32, 100‧‧‧ LCD panel
104, 300‧‧ ‧ gate driver
301_1, 301_2, 301_K, 801_1, 801_2, 801_L‧‧‧ rotation modules
106, 302‧‧‧ voltage generator
102, 304, 604, 904‧‧‧ source drivers
105_1, 105_2, 105_N-1, 105_N, 305_0, 305_1, 305_2, 305_3, 305_4, 305_5, 305_N-1, 305_N, 305_N+1‧‧‧ buffer amplifier
103_1, 103_2, 103_N-1, 103_N, 307_0, 307_1, 307_2, 307_3, 307_4, 307_N-1, 307_N, 307_N+1‧‧‧ digital analog converter
112, 308‧‧‧ film transistor
114, 310‧‧‧ equivalent capacitance
DAT1, DAT2, DAT3, DAT4, DATN-1, DATN‧‧‧ lines of image data
SW1_1, SW1_2, SW1_3, SW1_4, SW1_N-1, SW1_N, SW3_1, SW3_2, SW3_3, SW3_N, ‧‧‧ first switch
SW2_1, SW2_2, SW2_3, SW2_4, SW2_N-1, SW2_N, SW4_1, SW4_2, SW4_3, SW4_N‧‧‧ second switch
A0, A1, A2, A3, A4, AN-1, AN, AN+1‧‧‧ analog signal
B0, B1, B2, B3, B4, BN-1, BN, BN+1‧‧‧ amplifier output signals

Vcom‧‧‧shared signal

VS_1, VS_2, VS_3, VS_4, VS_N-1, VS_N, S1, S2, S3, S4‧‧‧ source drive signals

VG_1, VG_2, VG_M-1, VG_M‧‧‧ scan signals

DAT‧‧‧ image data

C1, C2, C3, C4‧‧‧ pixels

T1, T2, T1', T2', T3', T1", T2", T3"

1 is a schematic view of a prior art thin film transistor liquid crystal display. Fig. 2 is a schematic view showing the gray scale of four rows of pixels on a liquid crystal display panel in the thin film transistor liquid crystal display of Fig. 1. 3 is a schematic view of a liquid crystal display device according to an embodiment of the present invention. Fig. 4 is a schematic view showing a source driver in the liquid crystal display device of Fig. 3. Figure 5A is a schematic diagram of the operation of the wheel module of the source driver of Figure 4. Figure 5B is a schematic diagram of the operation of the wheel module of the source driver of Figure 4. Figure 6 is a schematic view of a liquid crystal display device according to an embodiment of the present invention. Fig. 7A is a chromatic aberration diagram of the liquid crystal display panel of the liquid crystal display device of Fig. 3 or Fig. 6. Fig. 7B is a chromatic aberration diagram of the liquid crystal display panel of the liquid crystal display device of Fig. 3 or Fig. 6. Figure 8A is a diagram showing the relationship of the buffer amplifiers in the source drivers of the fourth or sixth source corresponding to the source driving signals in each period. FIG. 8B is a schematic diagram showing the relationship between the buffer driver of the source driver and the source driving signal in each period. Figure 9 is a schematic diagram of a source driver according to an embodiment of the present invention. Fig. 10 is a diagram showing the relationship between the buffer driving amplifiers in the source driver of Fig. 9 corresponding to the source driving signals in each period.

30‧‧‧Liquid crystal display device

32‧‧‧LCD panel

300‧‧‧gate driver

301_1, 301_K‧‧" rotation module

302‧‧‧Voltage generator

304‧‧‧Source Driver

305_1, 305_2, 305_N-1, 305_N‧‧‧ buffer amplifier

307_1, 307_2, 307_N-1, 307_N‧‧‧ digital analog converter

308‧‧‧film transistor

310‧‧‧ equivalent capacitance

DAT1, DAT2, DATN-1, DATN‧‧‧ images

SW1_1, SW1_2, SW1_N-1, SW1_N‧‧‧ first switch

SW2_1, SW2_2, SW2_N-1, SW2_N‧‧‧ second switch

A1, A2, AN-1, AN‧‧‧ analog signal

B1, B2, BN-1, BN‧‧‧ amplifier output signals

Vcom‧‧‧shared signal

VS_1, VS_2, VS_N-1, VS_N‧‧‧ source drive signals

VG_1, VG_2, VG_M-1, VG_M‧‧‧ scan signals

Claims (16)

A liquid crystal display device comprising: a liquid crystal display panel comprising: a plurality of pixel units; a gate driver electrically coupled to the plurality of pixel units for generating a plurality of scan signals, each scan The signal is used to drive the pixel unit on one of the liquid crystal display panels; a voltage generator is electrically coupled to the substrate for providing a common signal to the substrate; and a source driver includes a plurality of The rotation module, each rotation module includes: a plurality of digital analog converters, each digital analog converter is used to convert an image data into an analog signal; a plurality of buffer amplifiers, each buffer amplifier is electrically coupled to a digital analog converter of the plurality of digital analog converters for amplifying the thrust of the analog signal to generate an amplifier output signal; a plurality of first switches electrically coupled to the plurality of digital analog converters Between a plurality of buffer amplifiers, each of the first switches is configured to cyclically selectively transmit an analog signal to the plurality of buffers from the plurality of analog signals One of the buffer amplifiers; and a plurality of second switches, each of the second switches is electrically coupled to one of the plurality of buffer amplifiers and the liquid crystal display panel for outputting signals from the plurality of amplifiers The loop alternately selects an amplifier output signal as a source driving signal and transmits the source driving signal to the plurality of pixel units. The liquid crystal display device of claim 1, wherein the gate driver, the voltage generator, and the source driver respectively provide the plurality of scan signals according to the row polarity inversion, and the sharing The signal and the plurality of source driving signals are sent to the liquid crystal display panel. The liquid crystal display device of claim 1, wherein the gate driver, the voltage generator, and the source driver respectively provide the plurality of scan signals, the common signal, and the plurality of sources according to dot polarity inversion Drive the signal to the LCD panel. The liquid crystal display device of claim 1, wherein in a first period, the switching operation of the plurality of first switches and the plurality of second switches causes the plurality of buffer amplifiers and the plurality of source driving signals to generate a first a corresponding relationship, and in a second period, the switching operation of the plurality of first switches and the plurality of second switches causes the plurality of buffer amplifiers to generate a second correspondence with the plurality of source driving signals, and the plurality The operations of the first switch and the plurality of second switches are cycled during the first period and the second period. The liquid crystal display device of claim 4, wherein the first relationship is a one-to-one direct relationship, and the second relationship is a one-to-one cross relationship. The liquid crystal display device of claim 1, wherein the switching between the plurality of first switches and the plurality of second switches is performed in a first period, so that the plurality of buffer amplifiers and the plurality of source driving signals generate a first a corresponding relationship, in a second period, the switching operation of the plurality of first switches and the plurality of second switches causes the plurality of buffer amplifiers to generate a second correspondence with the plurality of source driving signals, In the third period, the switching operation of the plurality of first switches and the plurality of second switches causes the plurality of buffer amplifiers to generate a third correspondence with the plurality of source driving signals, and the plurality of first switches and the plurality of The operation of the second switches is cycled during the first period, the second period, and the third period. The liquid crystal display device of claim 6, wherein the first relationship is a one-to-one direct relationship, the second relationship is a one-to-one forward misalignment relationship, and the third relationship is a one-to-one negative misalignment relationship. The liquid crystal display device of claim 7, wherein the plurality of rotation modules partially share the plurality of digital analog converters, the plurality of buffer amplifiers, the plurality of first switches, and the plurality of second switches To satisfy the one-to-one forward misalignment relationship and the one-to-one negative misalignment relationship. The liquid crystal display device of claim 6, wherein the first relationship is a one-to-one direct relationship, the second relationship is a one-to-one cross relationship, and the third relationship is a one-to-one staggered cross relationship. A source driver for driving a liquid crystal display panel, the source driver includes: a plurality of rotation modules, each of which includes: a plurality of digital analog converters, each digital analog converter is used for conversion An image data is a type of analog signal; a plurality of buffer amplifiers, each of which is electrically coupled to a digital analog converter of the plurality of digital analog converters for amplifying the thrust of the analog signal to generate an amplifier output a plurality of first switches electrically coupled between the plurality of digital analog converters and the plurality of buffer amplifiers, each of the first switches for cyclically selecting and transmitting an analogy from the plurality of analog signals Signaling to one of the plurality of buffer amplifiers; and a plurality of second switches, each of which is electrically coupled to one of the plurality of buffer amplifiers and the liquid crystal display panel for cyclically selecting an amplifier output from the plurality of amplifier output signals The signal acts as a source driving signal and transmits the source driving signal to the liquid crystal display panel. The source driver of claim 10, wherein in a first period, the switching operation of the plurality of first switches and the plurality of second switches causes the plurality of buffer amplifiers and the plurality of source driving signals to generate a first a corresponding relationship, and in a second period, the switching operation of the plurality of first switches and the plurality of second switches causes the plurality of buffer amplifiers to generate a second correspondence with the plurality of source driving signals, and the plurality The operations of the first switch and the plurality of second switches are cycled during the first period and the second period. The source driver of claim 11, wherein the first relationship is a one-to-one direct relationship, and the second relationship is a one-to-one cross relationship. The source driver of claim 10, wherein in a first period, the switching operation of the plurality of first switches and the plurality of second switches causes the plurality of buffer amplifiers and the plurality of source driving signals to generate a first a corresponding relationship, in a second period, the switching operation of the plurality of first switches and the plurality of second switches causes the plurality of buffer amplifiers to generate a second correspondence with the plurality of source driving signals, In the third period, the switching operation of the plurality of first switches and the plurality of second switches causes the plurality of buffer amplifiers to generate a third correspondence with the plurality of source driving signals, and the plurality of first switches and the plurality of The operation of the second switches is cycled during the first period, the second period, and the third period. The source driver of claim 13, wherein the first relationship is a one-to-one direct relationship, the second relationship is a one-to-one forward misalignment relationship, and the third relationship is a one-to-one negative misalignment relationship. The source driver of claim 14, wherein the plurality of rotation modules partially share the plurality of digital analog converters, the plurality of buffer amplifiers, the plurality of first switches, and the plurality of second switches To satisfy the one-to-one forward misalignment relationship and the one-to-one negative misalignment relationship. The source driver of claim 13, wherein the first relationship is a one-to-one direct relationship, the second relationship is a one-to-one cross relationship, and the third relationship is a one-to-one staggered cross relationship.