TWI478138B - Driving circuit of pixel cell and method thereof - Google Patents

Description

Driving circuit of pixel unit and driving method thereof

The present invention relates to a pixel unit, and more particularly to a driving circuit of a pixel unit and a driving method thereof.

The driving method of the liquid crystal display is to control the rotation angle of the liquid crystal by changing the voltage across the liquid crystal layer, thereby changing the polarization direction of the light. The two ends of the liquid crystal layer are respectively coupled to the pixel electrode and the common electrode. The voltage on the pixel electrode changes with the pixel signal, and the common electrode is coupled to the common voltage. According to the direction of the electric field applied to the liquid crystal layer, the driving method of the liquid crystal display can be classified into a positive polarity driving and a negative polarity driving. When the voltage of the pixel electrode is higher than the common voltage, it is called positive polarity driving, and when the voltage of the pixel electrode is lower than the common voltage, it is called negative polarity driving.

Applying the same voltage difference in different electric field directions to both ends of the liquid crystal layer does not affect the transmittance of the liquid crystal. If the direction of the electric field applied to the liquid crystal layer is always positive or constant, the liquid crystal quality is deteriorated over a long period of time and cannot be smoothly rotated in response to the electric field change. This phenomenon is called liquid crystal polarization. In order to avoid the phenomenon of liquid crystal polarization, it is necessary to alternately use voltages of different polarities to drive the liquid crystal at different times, that is, to drive in a "polarity inversion" manner. The general polarity inversion methods include frame inversion, dot inversion, and line inversion.

For frame inversion, the liquid crystals of the pixel array during the same picture period are driven with voltages of the same polarity, and during two consecutive pictures, the liquid crystals of the pixel array are driven with voltages of different polarities. Due to polarity reversal The conversion time is in units of the picture period, so the driving method of the picture frame inversion is more power-saving, and is suitable for portable electronic devices, such as a mobile phone or a Personal Digital Assistant (PDA). However, when the driving voltage of the polarity inversion is asymmetrical or the switching speed is not fast enough, the human eye perceives the flickering of the screen. In order to solve the above problem, a frame buffer is generally used to pre-store a pixel signal to increase the frame rate, but the manufacturing cost of the liquid crystal display is relatively increased.

The invention provides a driving circuit of a pixel unit and a driving method of a pixel unit, wherein different pixel signals are respectively stored in the storage unit, and the pixel signal is transmitted to the pixel electrode through the switching of the switch to display Pixel information. Thereby, no additional frame buffer is needed to store the pixel signal, thereby effectively increasing the frame rate and avoiding the flickering of the picture.

The invention provides a driving circuit for a pixel unit, comprising first and second writable switches, first and second storage units, first and second displayable switches, and pixel electrodes. The control terminals of the first and second writable switches receive the scan control signals, and the first ends of the first and second writable switches are respectively coupled to the first and second data lines, and the first and second writable The second ends of the switches are respectively coupled to the first ends of the first and second storage units. The second ends of the first and second storage units are coupled to a reference voltage. The first and second storage units receive the first and second pixel signals via the first and second writable switches, respectively. The first ends of the first and second displayable switches respectively receive the first and second display control signals, and the first ends of the first and second displayable switches are respectively coupled to the first ends of the first and second storage units, and First and second display switchable second The end is coupled to the pixel electrode. The pixel electrodes receive the first and second pixel signals, respectively, via the first and second displayable switches during a picture period.

From another point of view, the present invention provides a method of driving a pixel unit. First, according to the scan control signal, the first pixel signal is transmitted from the first data line to the first storage unit, and the second pixel signal is transmitted from the second data line to the second storage unit. Then, according to the display control signal, the first storage unit and the second storage unit are respectively coupled to the pixel electrodes during the screen to display the first pixel signal and the second pixel signal.

The present invention further provides a driving circuit for a pixel unit, including first, second, and third writable switches, first, second, and third storage units, and first, second, and third writable switches, and Pixel electrode. The control ends of the first, second, and third writable switches receive the scan control signals, and the first ends of the first, second, and third writable switches are respectively coupled to the first, second, and third data lines, The second ends of the first, second, and third writable switches are respectively coupled to the first ends of the first, second, and third storage units. The second ends of the first, second, and third storage units are coupled to a reference voltage. The first, second, and third storage units receive the first, second, and third pixel signals via the first, second, and third writable switches, respectively. The control ends of the first, second, and third displayable switches respectively receive the first, second, and third display control signals, and the first ends of the first, second, and third displayable switches are respectively coupled to the first and the second The first ends of the second and third storage units, and the second ends of the first, second, and third displayable switches are coupled to the pixel electrodes. The pixel electrodes receive the first, second, and third pixel signals via the first, second, and third displayable switches, respectively, during the picture.

The invention uses multiple storage units to store different pixel signals, After switching the display switch, different pixel signals are sequentially transmitted to the pixel electrodes to display the corresponding pixel data. The present invention is applied to a driving circuit for polarity inversion, and the above different pixel signals are pixel signals of opposite polarities. Therefore, pixel signals of different polarities can be displayed during the same picture period to improve the frame rate of the display and reduce the probability of occurrence of picture flicker. The invention can also be applied to a driving circuit of a color sequential method, wherein the different pixel signals are pixel signals of different colors, so that pixel signals of different colors are sequentially transmitted to the pixel electrodes during the same picture period.

The above described features and advantages of the present invention will be more apparent from the following description.

1 is a circuit diagram of a driving circuit of a pixel unit according to an embodiment of the present invention. Referring to FIG. 1, the driving circuit 110 of the pixel unit includes a writable switch T11~T12, displayable switches S11~S12, storage units C11~C12, a reset switch RS1, and a pixel electrode Pi. The liquid crystal layer is represented by a liquid crystal capacitor CLC, and both ends of the liquid crystal capacitor CLC are respectively coupled to the pixel electrode Pi and the common electrode COM. In the present embodiment, the writeable switches T11 to T12, the displayable switches S11 to S12, and the reset switch RS1 are, for example, transistors or other semiconductor switching devices, and the storage cells C11 to C12 are, for example, capacitors.

The first end and the second end of the writeable switch T11 are respectively coupled to the data line D11 and the first end of the storage unit C11, and the control end of the writeable switch T11 receives the scan control signal Scan1 to control the writable switch T11. Whether it is conductive. The first end and the second end of the writable switch T12 are respectively coupled to the data line D12 and the first end of the storage unit C12, and the control end of the writeable switch T12 also receives the scan control signal Scan1 to control whether the writable switch T12 is turned on. The second end of the storage unit C11~C12 is coupled to the reference voltage VREF.

The first end and the second end of the display switch S11 are respectively coupled to the first end of the storage unit C11 and the pixel electrode Pi, and the control end of the display switch S11 receives the display control signal F11 to control whether the display switch S11 is turned on. . The first end and the second end of the switch S12 are respectively coupled to the first end of the storage unit C12 and the pixel electrode Pi, and the control end of the display switch S12 receives the display control signal F12 to control whether the display switch S12 is turned on. . The first end and the second end of the reset switch RS1 are respectively coupled to the pixel electrode Pi and the reset voltage VRST, and the control end of the reset switch RS1 receives the reset signal RST1 to control whether the reset switch RS1 is turned on.

For the polarity inversion driving method, each pixel unit must be alternately driven with voltages of different polarities at different times to avoid the phenomenon of liquid crystal polarization, for example, driving voltages with opposite positive and negative polarities during different periods. The pixel unit is alternately applied. The driving voltage of the opposite polarity is usually switched in units of one picture period. For example, in the current picture period, the pixel unit is driven with a positive polarity voltage, and the pixel unit is driven with a negative polarity voltage during the next picture period. The operation of this embodiment will be described below in conjunction with a timing chart to achieve a high frame rate polarity inversion drive.

2 is a timing diagram of a driving circuit of the pixel unit of FIG. 1 according to an embodiment of the present invention. For convenience of description, the positive polarity and negative polarity pixel signals received by the pixel electrode Pi in FIG. 2 are represented by +V and -V, respectively. Please refer to Figure 1 2, during the picture period P21, the scan control signal Scan1 of one of the scan lines on the corresponding panel is enabled, and the writable switches T11 and T12 are turned on. At this time, the positive polarity pixel signal +V is stored in the storage unit C11 via the data line D11 and the switchable switch T11 that is turned on. At the same time, the negative polarity pixel signal -V is stored in the storage unit C12 via the data line D12 and the switchable switch T12. When sufficient storage time has elapsed, the scan control signal Scan1 is deactivated, so that the writable switches T11, T12 are not turned on.

Next, in the picture period P21, the display control signals F11 and F12 are sequentially enabled to respectively control the displayable switches S11 and S12 to sequentially transmit the pixel signals of different polarities to the pixel electrodes Pi. For example, when the display control signal F11 is enabled to turn on the display switch S11, the positive polarity pixel signal +V stored in the storage unit C11 is transmitted to the pixel electrode Pi via the conductive display switch S11. When the display control signal F12 is enabled to turn on the display switch S12, the negative polarity pixel signal -V stored in the storage unit C12 is transmitted to the pixel electrode Pi via the conductive display switch S12.

In order to prevent the residual capacitance of the liquid crystal capacitor CLC, the picture display is not correct, for example, the image afterimage, so before the display switch S11, S12 can be turned on, the reset signal RST1 is enabled first, and the reset switch RS1 is turned on. To reset the pixel electrode Pi. In this embodiment, the reset action is to couple the pixel electrode Pi to the reset voltage VRST.

In short, in the present embodiment, when the scan control signal Scan1 corresponding to one of the scan lines is enabled, the positive polarity and negative polarity pixel signals are respectively stored in the storage units C11 and C12. Then, according to the display control signal F11 And F12, during a picture period, the displayable switches S11 and S12 are sequentially turned on to transmit the positive polarity and negative polarity pixel signals stored in the storage cells C11 and C12 to the pixel electrodes Pi, respectively. Therefore, during the same picture period, the pixel electrode Pi can sequentially reflect the positive polarity and negative polarity pixel signals, thereby increasing the frame rate and reducing the influence of the picture flicker.

According to the teachings of the above embodiments, the driving circuit 110 of the pixel unit can also be applied to a driving circuit of a color sequential method. The driving method of the color sequential method is mainly to quickly switch image images of different colors on the time axis within a time range of persistence of the human eye to generate a color mixing effect. Referring to FIG. 1 and FIG. 2, when the scan control signal Scan1 is enabled, the first color pixel signal and the second color pixel signal are stored in the storage units C11 and C12 via the data lines D11 and D12, respectively. Then, during the same picture period, the display control signals F11 and F12 are sequentially enabled, whereby the pixel signals of different colors are transmitted to the pixel electrode Pi. By switching the display switches S11 and S12, it is possible to switch between displaying images of different colors.

Furthermore, the driving circuit 110 of the pixel unit can simultaneously perform color sequential driving and polarity inversion driving. That is, when the scan control signal Scan1 is enabled during a picture, the first color pixel signal having the positive polarity and the second color pixel signal having the negative polarity are simultaneously transmitted to the storage units C11 and C12, respectively. . Then, during the same picture period, the pixel signals stored in the storage units C11 and C12 are sequentially transmitted to the pixel electrodes Pi by the control of the display control signals F11 and F12. In addition, when the scan control signal Scan1 is enabled again during the next screen, similarly, the pixel unit is driven in accordance with the operation mode as described above.

In general, the color sequential driving method requires three colors to combine full colors, such as red, green, and blue. The present invention will be readily implemented by those skilled in the art in light of the teachings of the embodiments of the invention. 3 is a circuit diagram of a driving circuit of a pixel unit in accordance with an embodiment of the present invention. Referring to FIG. 3, the driving circuit 300 of the pixel unit includes a writable switch T31~T33, storage units C31-C33, displayable switches S31-S33, a reset switch RS3, and a pixel electrode Pi. Here, the writable switches T31 to T33, the displayable switches S31 to S33, and the reset switch RS3 are, for example, transistors or other semiconductor switching devices. The storage units C31 to C33 are, for example, capacitors.

The control terminal of the writable switches T31 to T33 receives the scan control signal Scan3 to determine whether or not to turn on according to the scan control signal Scan3. As shown in the figure, the first end and the second end of the writeable switch T31~T33 are respectively coupled to the data lines D31~D33 and the first ends of the storage units C31~C33. The second ends of the storage units C31-C33 are coupled to the reference voltage VREF. The control terminals of the display switches S31 to S33 respectively receive the display control signals F31 to F33 to determine whether to conduct according to the display control signals F31 to F33. The first ends of the display switches S31-S33 are respectively coupled to the first ends of the storage units C31-C33, and the second ends of the display switches S31-S33 are coupled to the pixel electrodes Pi. The first end and the second end of the reset switch RS3 are respectively coupled to the pixel electrode Pi and the reset voltage VRST, and the control end of the reset switch RS3 receives the reset signal RST3 to control whether the reset switch RS3 is turned on.

4 is a timing diagram of a driving circuit of the pixel unit of FIG. 3 according to an embodiment of the present invention. Please refer to FIG. 3 and FIG. 4. For convenience of description, the picture element in FIG. The positive polarity and negative polarity pixel signals received by the pole Pi are represented by + and -, respectively, and the red, green, and blue pixel signals received by the pixel electrode Pi are represented by V1, V2, and V3, respectively. First, in the picture period P41, the scan control signal Scan3 corresponding to one of the scanning lines on the panel is enabled, and the writable switches T31 to T33 are turned on. At this time, the positive red pixel signal +V1 is stored in the storage unit C31 via the data line D31 and the conductive switch T31, and the negative green pixel signal -V2 is written via the data line D32 and the switchable switch T32. And stored in the storage unit C32, and the positive blue pixel signal +V3 is stored in the storage unit C33 via the data line D33 and the conductive switch T33 that is turned on. Then, in the picture period P41, the scan control signals F31~F32 are sequentially enabled, so that the displayable switches S31~S33 are sequentially turned on, thereby transmitting the pixel signals stored in the storage units C31~C33 to the pixel electrodes. Therefore, the pixel electrode Pi sequentially reacts the positive red pixel signal +V1, the negative green pixel signal -V2, and the positive blue pixel signal +V3 during the picture period P41 to realize the color sequence. Drive and polarity inversion drive.

Similarly, when the scan control signal Scan3 is enabled during the next picture period P42, when the writable switch T31~T33 is turned on, the negative red pixel signal -V1, the positive green pixel signal +V2, and the negative blue The pixel signals -V3 are stored in the storage units C31 to C33, respectively. Next, in the screen period P42, the scan control signals F31 to F32 are sequentially enabled, and the displayable switches S31 to S33 are sequentially turned on. Thereby, the pixel electrode Pi sequentially reflects the positive red pixel signal -V1, the negative green pixel signal +V2, and the positive blue pixel signal -V3 in the picture period P42. In this reality In the embodiment, the reset signal RST3 is enabled before the displayable switches S31 to S33 are turned on, and the reset switch RS3 is turned on to reset the pixel electrode Pi.

It is worth noting that the color sequence driving is to quickly switch the image images of different colors on the time axis to achieve the color mixing effect, so the order of the red, green and blue pixel signals is not limited. In addition, in the embodiment of FIG. 3, for the same data line, pixel signals of different polarities, for example, +V1 and -V1, are separately transmitted during two consecutive frames. Therefore, in another embodiment of the present invention, the front end of the driving circuit 300 of the pixel unit can be coupled to a frame rate converter to transmit pixel signals of different polarities to the data lines during different pictures. .

In order to effectively increase the frame rate and save the manufacturing cost of the frame rate converter, an embodiment will be described below. Figure 5 is a circuit diagram of a driving circuit of a pixel unit in accordance with an embodiment of the present invention. Referring to FIG. 5, the driving circuit 500 of the pixel unit includes sub driving units 510, 520, and 530, a reset switch RS5, and a pixel electrode Pi. Each of the sub-drive units 510, 520, and 530 includes a writable switch T51~T52, a display switch S51-S52, and a storage unit C51-C52, and each sub-drive unit 510, 520, and 530 transmits through the corresponding two data lines. Transmit pixel signals, namely D51~D52, D53~D54 and D55~D56. The components of each of the sub-drive units 510, 520, and 530 are coupled to each other in the same manner as the drive circuit 110 of the pixel unit of FIG. 1 (except the reset switch RS1), and thus are not described herein. In addition, the displayable switches S51 and S52 in the sub-drive unit 510 are controlled by the display control signals F51 and F52, respectively, and the displayable switches S51 and S52 in the sub-drive unit 520 are respectively controlled by the display control signals. F53 and F54, and displayable switches S51 and S52 in sub-drive unit 530 are controlled by display control signals F55 and F56, respectively.

For the sub-driving unit 510, when the scan control signal Scan5 enables the writable switches T51~T52 to be turned on, the positive red pixel signal and the negative red pixel signal are stored in the sub-data lines D51 and D52, respectively. The storage units C51 and C52 in the drive unit 510. Simultaneously, for the sub-driving units 520 and 530, the positive green pixel signal and the negative green pixel signal are stored in the storage units C51 and C52 in the sub-driving unit 520 via the data lines D53 and D54, respectively, and the positive electrode. The blue pixel signal and the negative blue pixel signal are also stored in the storage units C51 and C52 in the sub-drive unit 530 via the data lines D55 and D56, respectively. Therefore, when the scan control signal Scan5 is enabled, the positive and negative polarity color pixel signals can be stored in the storage units C51 and C52 in the respective sub-drive units, respectively.

Then, during a picture period, the scan control signals F51-F56 can be sequentially enabled to turn on the corresponding displayable switches, thereby transmitting the positive and negative polarity color pixel signals to the pixel electrodes Pi. That is to say, during the same picture period, the pixel electrode Pi can sequentially reflect the positive red pixel signal, the negative red pixel signal, the positive green pixel signal, the negative green pixel signal, and the positive blue. The pixel signal and the negative blue pixel signal. Here, it is not limited to the order in which the above pixel signals are displayed. In the present embodiment, the reset signal RST5 is enabled before the displayable switches S51 and S52 in each sub-drive unit are turned on to reset the pixel electrode Pi.

The driving circuit 300 of the pixel unit of the embodiment adopts a color sequential driving and a polarity inversion driving mode, and transmits the storage unit in each sub driving unit. C51 and C52 store various color pixels of positive and negative polarity. Therefore, it is only necessary to switch the displayable switches S51 and S52 in each sub-drive unit to effectively increase the frame rate without additional frame rate converter. Controls the pixel signal to be transmitted to the data line during different pictures.

In addition, since the various color pixel signals of the positive and negative polarities are stored in the storage units C51 and C52 in the sub-drive units, another embodiment of the present invention can enable the partial scan control signals F51~F56 during a picture period. The sequence is enabled, for example: F51, F54 and F55. Therefore, during the same picture period, the pixel electrode Pi can sequentially reflect the positive red pixel signal, the negative green pixel signal, and the positive blue pixel signal. During the next picture period, another portion of the scan control signals F51~F56 can be sequentially enabled, for example, F52, F53, and F56. Therefore, during the same picture period, the pixel electrode Pi sequentially responds to the negative red pixel signal, the positive green pixel signal, and the negative blue pixel number.

In summary, in the above-mentioned embodiment, the pixel signals of different polarities are respectively stored in the storage units C11 and C12 through the switching of the writable switches T11 and T12 during one screen. Then, during the same picture period, the pixel switches of different polarities are sequentially transmitted to the pixel electrode Pi through the switchable display switches S11 and S22 to realize the polarity inversion driving of the high frame rate. In addition, in the embodiment of FIG. 1, the pixel units of different colors can be stored by the storage units C11 and C12, and then the color sequence driving can be performed by switching the display switches S11 and S22.

Since the color sequential driving is usually to switch the display of three colors of red, green and blue, the embodiment of FIG. 3 proposes to have three storage units. C31 ~ C33 drive circuit. When the scan control signal Scan3 is enabled during one frame, the red, green and blue pixel signals alternating between positive and negative polarity are stored in the storage units C31 to C33, respectively. During the same picture period, the pixel signals stored in the storage units C31 to C33 can be transmitted to the pixel electrode Pi through the switching of the displayable switches S31 to S33. When the scan control signal Scan3 is enabled during the next screen, the red, green, and blue pixel signals of opposite polarities to the previous screen are stored in the storage units C31-C33, respectively. During the same picture period, the pixel signals stored in the storage units C31 to C33 can be transmitted to the pixel electrode Pi through the switching of the displayable switches S31 to S33.

In the embodiment of Fig. 5, when the scan control signal Scan5 is enabled during a picture, various color pixel signals of different polarities are simultaneously transmitted to the storage units C51 and C52 in the respective sub-drive units for storage. Therefore, the color sequence driving and the polarity inversion driving can be performed only by switching the displayable switches S51 and S52 in the respective sub-driving units, and the frame rate of the display can be determined. In the above embodiment, the frame buffer is not required to store the pixel signal, and the frame rate can be improved by switching the display switch to prevent the frame from flickering.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

110, 300, 500‧‧‧ pixel unit drive circuit

510, 520, 530‧ ‧ sub-driver unit

T11~T12, T31~T33, T51~T52‧‧‧ writable switch

S11~S12, S31~33, S51~S52‧‧‧ display switch

RS1, RS3, RS5‧‧‧ reset switch

C11~C12, C31~C33, C51~C52‧‧‧ storage unit

CLC‧‧‧Liquid Crystal Capacitor

Pi‧‧‧ pixel electrode

COM‧‧‧Common electrode

VREF‧‧‧reference voltage

VRST‧‧‧Reset voltage

D11~D12, D31~D33, D51~D56‧‧‧ data line

Scan1, Scan3, Scan5‧‧‧ scan control signals

F11~F12, F31~F32, F51~F56‧‧‧ display control signals

RST1, RST3, RST5‧‧‧ reset signal

1 is a circuit diagram of a driving circuit of a pixel unit according to an embodiment of the present invention; Figure.

2 is a timing diagram of a driving circuit of the pixel unit of FIG. 1 according to an embodiment of the present invention.

3 is a circuit diagram of a driving circuit of a pixel unit according to an embodiment of the present invention.

4 is a timing diagram of a driving circuit of the pixel unit of FIG. 3 according to an embodiment of the present invention.

Figure 5 is a circuit diagram of a driving circuit of a pixel unit in accordance with an embodiment of the present invention.

Driving circuit of 110‧‧‧ pixel unit

T11~T12‧‧‧ writable switch

S11~S12‧‧‧display switch

RS1‧‧‧Reset switch

C11~C12‧‧‧ storage unit

F11~F12‧‧‧ display control signal

CLC‧‧‧Liquid Crystal Capacitor

Scan1‧‧‧ scan control signal

RST1‧‧‧Reset signal

D11~D12‧‧‧ data line

Pi‧‧‧ pixel electrode

COM‧‧‧Common electrode

VRST‧‧‧Reset voltage

Claims (15)

A driving circuit of a pixel unit includes: a first writable switch, the control end receiving a scan control signal, the first end of which is coupled to a first data line; and the second writeable switch, the control end thereof Receiving the scan control signal, the first end is coupled to a second data line; a first storage unit having a first end coupled to the second end of the first writable switch and a second end coupled to the reference a voltage, wherein the first storage unit receives a first pixel signal via the first writable switch; a second storage unit having a first end coupled to the second end of the second writable switch, The second end is coupled to the reference voltage, wherein the second storage unit receives a second pixel signal via the second writable switch; a first display switch, the control end receives a first display control signal, The first end is coupled to the first end of the first storage unit; the second display switch is configured to receive a second display control signal, the first end of which is coupled to the first end of the second storage unit; And a pixel electrode coupled to the second end of the first display switch The second display may be a second terminal of the switch, the switch to be displayed can be displayed and the second switch receives the first pixel signal and the second signal via the first pixel during one picture. The driving circuit of claim 1, further comprising: a reset switch, wherein the control end receives a reset signal, the first end of which is coupled to the second end of the first display switch and the second The second end of the switch can be displayed, and the second end of the switch is coupled to a reset voltage for use in the first display switch and The pixel electrode is reset before the second display switch is turned on. The driving circuit of claim 1, wherein the first pixel signal and the second pixel signal are respectively a positive polarity and a negative polarity pixel signal. The driving circuit of claim 1, wherein the first pixel signal and the second pixel signal are pixel signals of a first color and a second color, respectively. The driving circuit of claim 4, wherein the first pixel signal and the second pixel signal are respectively a positive polarity and a negative polarity pixel signal. A method for driving a pixel unit includes: transmitting a first pixel signal from a first data line to a first storage unit according to a scan control signal, and transmitting a second pixel signal from a second data line Corresponding to a second storage unit; and electrically connecting the first storage unit and the second storage unit to a pixel electrode during a screen according to a display control signal to display the first pixel signal and the The second pixel signal. The driving method of claim 6, further comprising: electrically connecting the pixel electrode to a reset voltage to reset the pixel according to a reset signal before the display control signal is enabled. electrode. The driving method of claim 6, wherein the first pixel signal and the second pixel signal are respectively a positive polarity and a negative polarity pixel signal. The driving method according to claim 6, wherein the first The pixel signal and the second pixel signal are pixel signals of a first color and a second color, respectively. The driving method of claim 9, wherein the first pixel signal and the second pixel signal are respectively a positive polarity and a negative polarity pixel signal. A driving circuit of a pixel unit includes: a first writable switch, the control end receiving a scan control signal, the first end of which is coupled to a first data line; and the second writeable switch, the control end thereof Receiving the scan control signal, the first end is coupled to a second data line; a third writable switch, the control end receiving the scan control signal, the first end of which is coupled to a third data line; The storage unit has a first end coupled to the second end of the first writable switch, a second end coupled to a reference voltage, wherein the first storage unit receives a first via the first writable switch a second storage unit, the first end of which is coupled to the second end of the second writable switch, the second end of which is coupled to the reference voltage, wherein the second storage unit is Receiving a switch and receiving a second pixel signal; a third storage unit having a first end coupled to the second end of the third writable switch, a second end coupled to the reference voltage, wherein the third storage The unit receives a third pixel signal via the third writable switch; a first Display switch, a control terminal receiving a first display control signal, a first terminal coupled to a first terminal of the first storage unit; a second display switch control terminal for receiving a second display control signal The first end is coupled to the first end of the second storage unit; the third display switch is configured to receive a third display control signal, the first end of which is coupled to the first end of the third storage unit And a pixel electrode coupled to the second end of the first display switch, the second end of the second display switch, and the second end of the third display switch for being used during a picture The first displayable switch, the second displayable switch, and the third displayable switch respectively receive the first pixel signal, the second pixel signal, and the third pixel signal. The driving circuit of claim 11, further comprising: a reset switch, wherein the control end receives a reset signal, the first end of which is coupled to the second end of the first display switch, the second The second end of the switch and the second end of the third display switch can be displayed, and the second end is coupled to a reset voltage for the first display switch, the second display switch and the third display switch Reset the pixel electrode before turning it on. The driving circuit of claim 11, wherein the first pixel signal, the second pixel signal, and the third pixel signal are a first color, a second color, and a third color, respectively. The pixel signal. The driving circuit of claim 13, wherein the first pixel signal, the second pixel signal, and the third pixel signal are respectively a positive polarity, a negative polarity, and a positive polarity pixel. signal. The driving circuit of claim 13, wherein the first pixel signal, the second pixel signal, and the third pixel signal are respectively a negative polarity, a positive polarity, and a negative polarity pixel. signal.