TWI645396B - Display panel and associated precharging method - Google Patents

Abstract

The display panel includes a plurality of data lines, a data driving circuit, and a precharge circuit. The plurality of data lines include a first data line and a second data line. The data driving circuit is coupled to a plurality of data lines. The pre-charging circuit is coupled to a plurality of data lines. When the data driving circuit provides a first pixel voltage to the first data line, the precharge circuit precharges the second data line with the first pixel voltage.

Description

Display panel and pre-charging method

The present invention relates to a display technology, and more particularly, to a display panel and a pre-charging method applied to the same.

Display panels are widely used in a variety of consumer electronics products, such as computer screens, mobile phones, televisions, and so on. The display panel has multiple pixels. When driving each pixel to display image data, each pixel needs sufficient charging time to achieve the correct pixel voltage. In the built-in touch panel, the display panel is integrated with the touch function, which drives the display of image data and touch sensing to operate in a time-sharing manner, which reduces the charging time available for the pixel structure. In addition, the increasing demand for the resolution of the display panel image is also equivalent to reducing the charging time of each pixel. Therefore, designing a display panel with an appropriate precharge function is one of the issues that the industry is currently working on.

The invention relates to a display panel and a pre-charging method applied to the display panel, which can effectively pre-charge pixels to ensure that the pixels reach the correct voltage.

According to an aspect of the present invention, a display panel is provided, including a plurality of data lines, a data driving circuit, and a precharge circuit. The plurality of data lines include a first data line and a second data line. The data driving circuit is coupled to a plurality of data lines. The pre-charging circuit is coupled to a plurality of data lines. When the data driving circuit provides a first pixel voltage to the first data line, the precharge circuit precharges the second data line with the first pixel voltage.

According to another aspect of the present invention, a pre-charging method is provided, which includes the following steps. A display panel is provided. The display panel includes a plurality of data lines, a data driving circuit, and a precharge circuit. The plurality of data lines includes a first data line and a second data line. The data driving circuit provides a first pixel voltage to the first data line. When the data driving circuit provides a first pixel voltage to the first data line, the precharge circuit precharges the second data line with the first pixel voltage.

In order to have a better understanding of the above and other aspects of the present invention, the following specific examples are described in detail below in conjunction with the accompanying drawings:

The following will clearly illustrate the spirit of the present disclosure with diagrams and detailed descriptions. Any person with ordinary knowledge in the technical field who understands the embodiments of the present disclosure can be changed and modified by the techniques taught in the present disclosure. It does not depart from the spirit and scope of this disclosure.

Regarding the "first", "second", ..., etc. used herein, it does not mean a specific order or order, nor is it used to limit the present invention, which is only for distinguishing elements or operations described in the same technical terms.

As used in this article, "electrical coupling" and "coupling" can mean that two or more components make direct physical or electrical contact with each other, or indirectly make physical or electrical contact with each other, and "electrical coupling" "Connecting" and "coupling" can also mean that two or more components operate or act on each other.

The terms "including", "including", "having", "containing" and the like used in this article are all open terms, which means including but not limited to.

As used herein, "and / or" includes any and all combinations of the stated matters.

Regarding the terms used in this article, unless otherwise specified, they usually have the ordinary meaning of each term used in this field, in the content disclosed here and in special content. Certain terms used to describe this disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art on the description of this disclosure.

FIG. 1 is a schematic diagram of a display panel according to a first embodiment of the present invention. The display panel 10a includes a plurality of scanning lines G1 to G3, a plurality of data lines D1 to D6, a data driving circuit 110, and a precharge circuit 120. The data driving circuit 110 is coupled to a plurality of data lines D1 to D6, and the precharge circuit 120 is coupled to a plurality of data lines D1 to D6. Each scan line G1 ~ G3 and each data line D1 ~ D6 are used to transmit signals to each pixel structure. In the embodiment shown in FIG. 1, the pixel structure includes a thin film transistor (TFT), a liquid crystal capacitor, and a storage capacitor. The pixel structure shown in FIG. 1 is only exemplary and is not intended to limit the present invention. The display panel and the pre-charging method mentioned in the present invention can also be applied to other types of pixel structures, such as organic light-emitting diodes. Polar body (organic light emitting diode (OLED)). A plurality of pixel structures constitute a display area. In one embodiment, the data driving circuit 110 and the pre-charging circuit 120 may be disposed on different sides of the display area. As shown in the example in FIG. 1, the data driving circuit 110 may be disposed On the bottom side of the display area, the pre-charging circuit 120 may be disposed on the top side of the display area. The setting positions of the data driving circuit 110 and the pre-charging circuit 120 may be changed according to actual needs, and the present invention is not limited thereto.

In addition, the number of scan lines and data lines shown in FIG. 1 are also exemplary, and the display panel 10 may include more scan lines and data lines. When displaying the image data, the scanning lines G1 to G3 are turned on in order to write the image data from the data driving circuit 110 into the corresponding pixel structure. Data lines D1 to D6 are sequentially adjacent to each other, that is, data line D1 is adjacent to data line D2, data line D2 is adjacent to data line D3, and so on.

FIG. 2 is a schematic diagram of a data driving circuit including a multiplexing circuit according to an embodiment of the present invention. In this embodiment, the data driving circuit 110 includes a source driver 114 and a multiplexing circuit 112. The multiplexing circuit 112 has an input terminal coupled to the data driving signal line ds, a plurality of output terminals coupled to the data lines D1 to D6, and at least A multiplexing control terminal is coupled to at least one multiplexing control signal ms. The source driver 114 is, for example, an integrated circuit disposed near the bottom side of the display panel 10a, and is used to provide image data to the display panel 10a. By providing the multiplexing circuit 112, the number of traces between the panel display area and the source driver 114 can be reduced, thereby achieving the purpose of a narrow frame panel. The data lines D1 to D6 respectively correspond to a sub-pixel area, for example. The multiplexer circuit 112 is controlled by the multiplexing control signal ms, and sequentially transmits the voltage of the data driving signal line ds to the data lines D1 to D6. For example, data line D1 corresponds to the red sub-pixel area of the first pixel, data line D2 corresponds to the green sub-pixel area of the first pixel, and data line D3 corresponds to the blue sub-picture of the first pixel. Pixel area, data line D4 corresponds to the red sub-pixel area of the second pixel, data line D5 corresponds to the green sub-pixel area of the second pixel, and data line D6 corresponds to the blue sub-pixel of the second pixel Area.

FIG. 3 is a schematic diagram of a multiplexing circuit according to an embodiment of the present invention. The multiplexing circuit 112 includes switching elements T11 to T16, corresponding to the data lines D1 to D6, respectively, and the switching elements T11 to T16 are controlled by the multiplexing control signals ms1 to ms6, respectively. When driving the display data, one of the multiplexing control signals ms1 to ms6 is enabled and the rest are disabled, so that the voltage of the data driving signal line ds is transmitted to the corresponding data line. In the following description, in order to clearly explain the operation principle, FIG. 3 will be used as an example description of the multiplexing circuit 112. However, it should be understood that the illustration in FIG. 3 is only an embodiment of the multiplexing circuit 112. Not limited to this, the multiplexing circuit 112 can also use other circuit implementation methods, and the type of the multiplexing circuit 112 is not limited to 1 to 6, but can also use, for example, 1 to 2, 1 to 3, or other types of multi-circuit.工 电路。 Circuits.

In a display panel provided with a multiplexer circuit, since multiple data lines corresponding to the same multiplexer circuit sequentially write image data, the charging time allocated to the pixel structure corresponding to each data line is reduced, Therefore, by pre-charging before writing pixel data, the voltage of the pixel structure can be increased first to ensure that the pixel structure can reach the correct voltage when writing image data.

Referring to FIG. 1, in an embodiment, when the data driving circuit 110 provides the first pixel voltage V1 to the data line D2, the precharge circuit 120 precharges the data line D3 with the first pixel voltage V1. Reference may be made to FIGS. 1 to 3 at the same time. In an embodiment having a multiplexing circuit 112, the above operation may be when the multiplexing circuit 112 drives the voltage of the signal line ds (the first pixel in this example) When the voltage V1 is transmitted to the data line D2 (for example, the switching element T12 in FIG. 3 is turned on, and the remaining switching elements T11 and T13 to T16 are turned off), the precharging circuit 120 pre-charges the data line D3 with the first pixel voltage V1. Charging.

In the example shown in FIG. 1, during the pre-charging process, only scan line G2 is on, and scan line G1 and scan line G3 are both off. That is, using the pre-charging method according to the present invention, only one Scan lines (or gate lines) can be used to perform pre-charging. In addition, the data line D2 and the data line D3 are adjacent to each other, so the precharge voltage used for the pixels is the voltage of the adjacent pixels, so that the pixels can reach the correct voltage value.

FIG. 1 is only an example. The example of using the voltage of adjacent pixels as the precharge voltage may further include that when the data driving circuit 110 provides the second pixel voltage V2 to the data line D4, the precharge circuit 120 uses The second pixel voltage V2 precharges the data line D5. Other similar examples will be mentioned below in this specification.

In addition, the present invention is not limited to using the voltage of adjacent pixels as the precharge voltage. In one embodiment, when the data driving circuit 110 provides the first pixel voltage V1 to the data line D2, the precharge circuit 120 uses the first The pixel voltage V1 precharges the data line D5, and the data line D2 is not adjacent to the data line D5. Other similar examples will be mentioned below in this specification. In these embodiments, no matter whether the voltage of adjacent pixels is used as the precharge voltage, only one scan line needs to be turned on when performing the precharge.

FIG. 4 is a schematic circuit diagram of a display panel 10b according to a second embodiment of the present invention. In this embodiment, the pre-charging circuit 120 includes switching elements T21 to T26, and each switching element has a first terminal (the lower end in FIG. 4), a second terminal (the upper end in FIG. 4), and a control terminal. The switching elements T21 to T26 may be, for example, metal oxide semiconductor field effect transistors (MOSFETs), and the control terminals of the switching elements T21 to T26 are, for example, corresponding to the gate terminals of the MOSFET. The first ends of the switching elements T21 to T26 are respectively coupled to the data lines D1 to D6, and the control ends of the switching elements T21 to T26 are respectively used to receive the control signals ps1 to ps6. Please refer to the example shown in FIG. 1. When the data driving circuit 110 provides the first pixel voltage V1 to the data line D2, the switching element T22 is turned off and the switching element T23 is turned on. Therefore, the voltage at the second terminal of the switching element T23 (in this example) The first pixel voltage V1) is transmitted to the data line D3 as a precharge voltage.

There are multiple circuit implementations to make the precharge voltage provided by the precharge circuit 120 the same as the pixel voltage provided by the data driving circuit 110. Several embodiments are listed below. FIG. 5 is a schematic circuit diagram of a display panel 10c according to a third embodiment of the present invention. In this embodiment, the second ends of the plurality of switching elements T21 to T26 are coupled to each other, and the source driver 114 has a pre-charged connection. Pin, the second ends of the plurality of switching elements T21 ~ T26 can be coupled to this pre-charging pin. Since the pixel voltage is provided by the source driver 114, the voltage received by the second terminals of the switching elements T21 to T26 can be the same as the pixel voltage. And because the pre-charging pin is a signal pin independent of the data driving signal line ds, the pre-charging operation will not cause disturbance to the voltage of the data driving signal line ds.

FIG. 6 is a schematic circuit diagram of a display panel 10d according to a fourth embodiment of the present invention. In this embodiment, the second ends of the plurality of switching elements T21 to T26 are coupled to each other, and the second ends of the plurality of switching elements T21 to T26 are coupled to the data driving signal line ds. The pixel voltage comes from the data driving signal line ds, so that the voltage received by the second ends of the switching elements T21 to T26 is the same as the pixel voltage. Compared with the display panel 10c shown in FIG. 5, the source driver 114 of the display panel 10d does not need to be provided with a pre-charge pin, so the number of pins of the integrated circuit can be reduced. For example, taking the data driving circuit 110 using a 1-to-6 multiplexing circuit as an example, in the display panel 10c shown in FIG. 5, every 6 data lines need to be provided with a precharge pin corresponding to the source driver 114. As the number of data lines on the display panel increases, the number of pre-charge pins required will also increase.

FIG. 7 is a schematic circuit diagram of a display panel 10e according to a fifth embodiment of the present invention. In this embodiment, the first terminal of the switching element T21 is coupled to the second terminal of the switching element T22, the first terminal of the switching element T22 is coupled to the second terminal of the switching element T23, and the first terminal of the switching element T23 is coupled to the switch. The second end of the element T24, and so on. Therefore, when the switching element T22 is turned on, the voltage of the data line D1 can be used as the precharge voltage of the data line D2; when the switching element T23 is turned on, the voltage of the data line D2 can be used as the precharge voltage of the data line D3; when the switching element T24 When conducting, the voltage of the data line D3 can be used as the precharge voltage of the data line D4, and so on. Compared with the display panel 10c shown in FIG. 5 and the display panel 10d shown in FIG. 6, the display panel 10e does not need to be wound from the top side of the display area to the bottom side of the display area, which can effectively save hardware routing. Space, and avoiding the non-ideal effects of long-distance winding.

As described above, FIGS. 4 to 7 disclose the circuit structure of the display panel in various embodiments. Regarding the timing control of pre-charging and the corresponding circuit switch control, two timing control methods are disclosed below: “Pre-charging Method 1” And "Pre-charging Method Two". The pre-charging method 1 will be described below with reference to FIGS. 8A to 8D, and the pre-charging method 2 will be described with reference to FIGS. 9A to 9D. In FIGS. 8A to 8D and FIGS. 9A to 9D of the following drawings, only the switching elements T11 to T16 are shown for the data driving circuit 110, and only the switching elements T21 to T26 are shown for the precharge circuit 120. The conduction conditions of the switching elements at different time points are clearly explained, and it is indicated that both the precharge method 1 and the precharge method 2 can be applied to different circuit structures as shown in FIGS. 4 to 7.

8A to 8D are schematic diagrams of a pre-charging method according to an embodiment of the present invention. Taking the currently opened scanning line as G1 as an example, as shown in FIG. 8A, before writing the pixel voltage, the data line D1 is precharged with a preset precharge voltage V0. At this time, the multiplexing control signals ms1 ~ ms6 The control switching elements T11 to T16 are turned off, the control signal ps1 controls the switching element T21 to be turned on, and the control signals ps2 to ps6 control the switching elements T21 to T26 to be turned off. In Figs. 8A to 8D and Figs. 9A to 9D, a cross symbol ('X') is drawn on the switching element to indicate that the switching element is in an off state, which will not be described repeatedly below.

Next, as shown in FIG. 8B, the multiplexing control signal ms1 controls the switching element T11 to be turned on, so that the data driving circuit 110 provides a first pixel voltage V1 to the data line D1, and at the same time, the control signal ps2 controls the switching element T22 to be turned on, so that precharging is performed. The circuit 120 provides the first pixel voltage V1 to the data line D2. For detailed circuit implementation, refer to the embodiments shown in FIGS. 5 to 7. Since the data line D1 is precharged with the preset precharge voltage V0 at the previous time point (FIG. 8A), when the first pixel voltage V1 is written to the data line D1, the correct voltage value can be reached relatively quickly.

Then, as shown in FIG. 8C, the multiplexing control signal ms2 controls the switching element T12 to be turned on, so that the data driving circuit 110 provides a second pixel voltage V2 to the data line D2, and at the same time, the control signal ps3 controls the switching element T23 to be turned on, so that precharging is performed. The circuit 120 provides a second pixel voltage V2 to the data line D3. Since the data line D2 is precharged with the first pixel voltage V1 of the adjacent data line D1 at the previous time point (FIG. 8B), when the second pixel voltage V2 is written to the data line D2, it can be faster. Reach the correct voltage value.

Similarly, as shown in FIG. 8D, the multiplexing control signal ms3 controls the switching element T13 to be turned on, so that the data driving circuit 110 provides a third pixel voltage V3 to the data line D3, and the control signal ps4 controls the switching element T24 to be turned on, so that The charging circuit 120 provides a third pixel voltage V3 to the data line D4. Since the data line D3 was precharged with the second pixel voltage V2 of the adjacent data line D2 at the previous time point (Figure 8C), when the third pixel voltage V3 is written to the data line D3, it can be faster. Reach the correct voltage value.

As shown in Figures 8A to 8D, and so on, after the steps in Figure 8D, the data line D5 can be precharged (using the pixel voltage of the data line D4), and the data line D6 can be precharged. Pre-charging (using the pixel voltage of the data line D5), because the voltages of adjacent pixels are used as the pre-charging voltage, can quickly reach the correct voltage value. After writing the pixel voltage to the data line D6, the next scanning line G2 can be turned on, and then return to the line 8A shown in FIG. 8A to precharge the data line D1 with the preset precharge voltage V0. carried out. In the pre-charging operation process described above, only one scan line is turned on, and the remaining scan lines are turned off.

9A to 9D are schematic diagrams of a second pre-charging method according to an embodiment of the present invention. Taking the currently opened scanning line as G1 as an example, as shown in FIG. 9A, before writing the pixel voltage, the data line D1 to the data line D6 are precharged with the preset precharge voltage V0. At this time, the multiplexing control The signals ms1 ~ ms6 control the switching elements T11 ~ T16 to turn off, and the control signals ps1 ~ ps6 control the switching elements T21 ~ T26 to turn on.

Next, as shown in FIG. 9B, the multiplexing control signal ms1 controls the switching element T11 to be turned on, so that the data driving circuit 110 provides the first pixel voltage V1 to the data line D1, and the control signals ps2 to ps6 control the switching elements T22 to T26 to be turned on. As a result, the pre-charging circuit 120 provides the first pixel voltage V1 to the data lines D2 to D6. For detailed circuit implementation, please refer to the embodiments shown in FIGS. 5 to 7. Since the data line D1 is precharged with the preset precharge voltage V0 at the previous time point (FIG. 8A), when the first pixel voltage V1 is written to the data line D1, the correct voltage value can be reached relatively quickly.

Next, as shown in FIG. 9C, the multiplexing control signal ms2 controls the switching element T12 to be turned on, so that the data driving circuit 110 provides a second pixel voltage V2 to the data line D2, and the control signals ps3 to ps6 control the switching elements T23 to T26 to be turned on. , So that the pre-charging circuit 120 provides the second pixel voltage V2 to the data lines D3 to D6. Because at the previous time point (Figure 9B), the data line D2 is precharged with the first pixel voltage V1 of the adjacent data line D1, and at an earlier time point (Figure 9A), the data line D2 is precharged with the It is assumed that the precharge voltage V0 is precharged, so when the second pixel voltage V2 is written to the data line D2, the correct voltage value can be reached relatively quickly.

Similarly, as shown in FIG. 9D, the multiplexing control signal ms3 controls the switching element T13 to be turned on, so that the data driving circuit 110 provides a third pixel voltage V3 to the data line D3, and the control signals ps4 to ps6 control the switching elements T24 to T26. It is turned on, so that the pre-charging circuit 120 provides the third pixel voltage V3 to the data lines D4 to D6. Because at the previous time point (Figure 9C), the data line D3 is precharged with the second pixel voltage V2 of the adjacent data line D2, and at an earlier time point (Figure 9B), the data line D3 also uses data The first pixel voltage V1 of line D1 is precharged, and at an earlier point in time (Figure 9A), the data line D3 is precharged with a preset precharge voltage V0 first, so when the third pixel voltage V3 is written When the data line D3 is reached, the correct voltage value can be reached relatively quickly.

As shown in Figures 9A to 9D, and so on, the data line D4 and the data line D4 can be continuously precharged when the pixel voltage of the data line D4 is written (using the data line D4 Pixel voltage), and when the pixel voltage of the data line D5 is written, the data line D6 is continuously precharged (the pixel voltage of the data line D5 is used). After writing the pixel voltage to the data line D6, the next scan line G2 can be turned on, and then return to the data line D1 to D6 with the preset precharge voltage V0 as shown in FIG. 9A. Repeat it like this. In the pre-charging operation flow as described above, only one scan line is turned on, and the remaining scan lines are turned off.

As described above, in the pre-charging method 2 shown in FIGS. 9A to 9D, the data cable has a longer pre-charging time than the pre-charging method 1 shown in FIGS. 8A to 8D. It is able to quickly reach the correct pixel voltage value. Taking the data line D3 as an example, if the pre-charging method 1 is used, the pre-charging is performed only on the data line D3 at the time point shown in FIG. 8C; and if the pre-charging method 2 is used, it is shown in FIGS. 9A to 9C. At the time point, the data line D3 continues to perform pre-charging, so it has a long pre-charging time.

And because the pre-charging method 2 is used, it has a longer pre-charging time. In one embodiment, the pre-charging voltage used can be adjusted according to the on-time of the switching element in the pre-charging circuit 120. Components, due to sufficient pre-charging time, can be given a smaller pre-charging voltage to achieve power saving effects. For example, it can be seen from FIGS. 9A to 9D that the switching element T26 has a longer turn-on time and the switching element T22 has a shorter turn-on time. Therefore, the precharge circuit 120 can give the data line D6 a smaller precharge voltage. , Give the data line D2 a larger precharge voltage.

On the other hand, in an embodiment, the turn-on time length of the switching element may be determined according to the pixel voltage and the precharge voltage. For example, the grayscale values corresponding to the first pixel voltage V1, the second pixel voltage V2, and the third pixel voltage V3 provided to the data lines D1 to D3 are, for example, 128, 128, and 64 (pixel gray). The step value is known information for the data driving circuit 120). According to these pixel voltage values, it can be known that the pre-charging time of the data line D3 can be shortened, and the pre-charging effect can also be completed. Therefore, as shown in FIG. 9B, the data line D3 has been precharged using the first pixel voltage V1. In the step shown in FIG. 9C, the control signal ps3 can control the switching element T23 to turn off, and stop the data line D3. Continue to perform pre-charging, because in the step in Figure 9B, the data line D3 has been pre-charged to the required voltage. This can reduce the number of conductive switching elements, and further achieve power saving effects, which is equivalent to distributing energy to other needs. Pixel structure for precharge time.

In the second pre-charging method, since each data line can have different pre-charging time, the pre-charging voltage and pre-charging time of each data line can be flexibly adjusted. For example, for a data line with a long pre-charging time, a lower Precharge voltage, or use a shorter precharge time for data cables with higher precharge voltages. In an embodiment, the display panels 10b to 10e shown in FIGS. 4 to 7 may further include a precharge timing control circuit, and the precharge timing control circuit is configured to generate control signals ps1 to ps6. Taking data line D3 as an example, the pre-charging timing control circuit can adjust the control based on the second pixel voltage V2 (corresponding to the pixel voltage of data line D2) and the third pixel voltage V3 (corresponding to the pixel voltage of data line D3) The enabling time length of the signal ps3 (corresponding to the switching element T23 of the data line D3). For example, a look-up table can be preset to be stored in the pre-charging timing control circuit. After the pre-charging timing control circuit obtains the pixel voltages of different data lines, the corresponding control signal enabling time length can be obtained from the look-up table. Of course, the circuit implementation method is not limited to this, and a pre-designed logic control circuit can also use a pre-designed logic circuit to perform a calculation from the pixel voltage to the control signal enable time.

The multiple embodiments shown in FIGS. 1 to 9D are embodiments corresponding to the six data lines D1 to D6. In a general display panel, the number of data lines can be hundreds or thousands, and the case where the embodiment shown in FIG. 1 to FIG. 9D is applied to more data lines is illustrated in FIG. 10. FIG. 10 shows a schematic circuit diagram of a display panel 10f according to a sixth embodiment of the present invention. In this embodiment, the circuit architecture shown in FIG. 6 is used as an example. Of course, the display panel 10f can also use other diagrams shown in FIG. Examples. The display panel 10f includes data lines D1 to D12. The data driving circuit 110 includes switching elements T11 to T16 corresponding to the data lines D1 to D6, and switching elements T11 ′ to T16 ′ corresponding to the data lines D7 to D12. The switching elements T11 to T16 are controlled by the multiplexing control signals ms1 to ms6, respectively. The components T11 ′ ~ T16 ′ are also controlled by the multiplexing control signals ms1 ~ ms6 respectively. The source driver 114 outputs the data driving signal line ds corresponding to the data lines D1 to D6, and the data driving signal line ds ′ corresponds to the data lines D7 to D12. . The pre-charging circuit 120 includes switching elements T21 to T26 corresponding to data lines D1 to D6, and switching elements T21 ′ to T26 ′ corresponding to data lines D7 to D12. The switching elements T21 to T26 are controlled by control signals ps1 to ps6, respectively, and the switching element T21 ′ ~ T26 ′ are also controlled by the control signals ps1 ~ ps6, respectively. Since the control signals ps1 to ps6 used are the same as the multiplex control signals ms1 to ms6, when the precharge method 1 shown in 8A to 8D (or the precharge method 2 shown in 9A to 9D) is included in the data When the lines D1 ~ D6 are executed, they can also be executed on the data lines D7 ~ D12 at the same time. For example, when the pixel voltage is provided to the data line D2, the data line D3 is precharged, and the pixel voltage is also provided to the data line D8, and the data line D9 is precharged. If the number of data lines of the display panel 10f is more, it can be extended according to the architecture shown in FIG. 10, and the number of control signals remains unchanged, and will not increase with the number of data lines.

According to the display panel and the pre-charging method described in the above embodiments of the present invention, only one scan line needs to be turned on during the pre-charging process, and the voltage of the neighboring pixels can be used to pre-charge the pixels, so the correct pixel voltage can be effectively reached. value. In addition, the pre-charging method can adopt several different timing controls, which can flexibly adjust the pre-charging voltage and pre-charging time of each data line to achieve a good pre-charging effect.

In summary, although the present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

10a ~ 10f‧‧‧Display Panel

110‧‧‧Data Drive Circuit

112‧‧‧Multiplex Circuit

114‧‧‧Source Driver

120‧‧‧ pre-charge circuit

D1 ~ D12‧‧‧Data line

ds, ds′‧‧‧ data drive signal line

G1 ~ G3‧‧‧scan line

ms 、 ms1 ~ ms6‧‧‧Multiplex control signal

ps1 ~ ps6‧‧‧Control signal

T11 ~ T16, T21 ~ T26, T11 ′ ~ T16 ′, T21 ′ ~ T26′‧‧‧ Switching element

V0‧‧‧ preset pre-charge voltage

V1‧‧‧ the first pixel voltage

V2‧‧‧Second Pixel Voltage

V3‧‧‧ third pixel voltage

FIG. 1 is a schematic diagram of a display panel according to a first embodiment of the present invention. FIG. 2 is a schematic diagram of a data driving circuit including a multiplexing circuit according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a multiplexing circuit according to an embodiment of the present invention. FIG. 4 is a schematic diagram of a display panel circuit according to a second embodiment of the present invention. FIG. 5 is a schematic diagram of a display panel circuit according to a third embodiment of the present invention. FIG. 6 is a schematic diagram of a display panel circuit according to a fourth embodiment of the present invention. FIG. 7 is a schematic circuit diagram of a display panel according to a fifth embodiment of the present invention. 8A to 8D are schematic diagrams of a pre-charging method according to an embodiment of the present invention. 9A to 9D are schematic diagrams of a second pre-charging method according to an embodiment of the present invention. FIG. 10 is a schematic circuit diagram of a display panel according to a sixth embodiment of the present invention.

Claims (20)

A display panel includes: a plurality of data lines, including a first data line and a second data line; a data driving circuit coupled to the plurality of data lines; and a precharge circuit coupled to the plurality of data lines Wherein, when the data driving circuit provides a first pixel voltage to the first data line, the precharge circuit precharges the second data line with the first pixel voltage. The display panel according to item 1 of the scope of patent application, wherein the first data line is adjacent to the second data line. The display panel according to item 1 of the scope of patent application, wherein the data driving circuit includes: a multiplexing circuit having an input terminal coupled to a data driving signal line, a plurality of output terminals coupled to the plurality of data lines, and At least one multiplexing control terminal is coupled to at least one multiplexing control signal. The display panel according to item 3 of the scope of patent application, wherein the pre-charging circuit includes: a first switching element having a first terminal, a second terminal, and a control terminal; the first switching element One end is coupled to the first data line, the control end of the first switching element is used to receive a first control signal; and a second switching element has a first end, a second end, and a control end. The first terminal of the second switching element is coupled to the second data line, and the control terminal of the second switching element is used to receive a second control signal; wherein when the data driving circuit provides the first pixel voltage When the first data line is reached, the first switching element is turned off and the second switching element is turned on. The display panel according to item 4 of the scope of patent application, wherein the second terminal of the first switching element is coupled to the second terminal of the second switching element. The display panel according to item 4 of the scope of patent application, wherein the second terminal of the first switching element is coupled to the data driving signal line. The display panel according to item 4 of the patent application, wherein the second terminal of the second switching element is coupled to the first terminal of the first switching element. The display panel according to item 4 of the scope of patent application, wherein the plurality of data lines further includes a third data line; wherein when the data driving circuit provides the first pixel voltage to the first data line, the pre- The charging circuit precharges the third data line with the first pixel voltage. The display panel according to item 8 of the scope of patent application, wherein when the data driving circuit provides a second pixel voltage to the second data line, the precharge circuit uses the second pixel voltage to the third data. Cable for pre-charging. The display panel according to item 9 of the scope of patent application, further comprising a pre-charging timing control circuit for adjusting the second control according to the first pixel voltage and the second pixel voltage. The consistent energy duration of the signal. A precharging method includes: providing a display panel including a plurality of data lines, a data driving circuit, and a precharging circuit, the plurality of data lines including a first data line and a second data line; The data driving circuit provides a first pixel voltage to the first data line; and when the data driving circuit provides the first pixel voltage to the first data line, the precharge circuit uses the first pixel voltage Pre-charge the second data line. The pre-charging method according to item 11 of the scope of patent application, wherein the first data line is adjacent to the second data line. The pre-charging method as described in item 11 of the scope of patent application, wherein the data driving circuit includes: a multiplexing circuit having an input terminal coupled to a data driving signal line, and a plurality of output terminals coupled to the plurality of data lines, And at least one multiplexing control terminal is coupled to at least one multiplexing control signal. The pre-charging method according to item 13 of the patent application scope, wherein the pre-charging circuit includes: a first switching element having a first terminal, a second terminal, and a control terminal; The first end is coupled to the first data line, the control end of the first switching element is used to receive a first control signal; and a second switching element has a first end, a second end, and a control Terminal, the first terminal of the second switching element is coupled to the second data line, and the control terminal of the second switching element is used to receive a second control signal; wherein when the data driving circuit provides the first pixel When the voltage reaches the first data line, the first switching element is turned off and the second switching element is turned on. The pre-charging method according to item 14 of the scope of patent application, wherein the second terminal of the first switching element is coupled to the second terminal of the second switching element. The pre-charging method according to item 14 of the scope of patent application, wherein the second terminal of the first switching element is coupled to the data driving signal line. The pre-charging method according to item 14 of the scope of patent application, wherein the second terminal of the second switching element is coupled to the first terminal of the first switching element. The pre-charging method according to item 14 of the scope of patent application, wherein the plurality of data lines further include a third data line; wherein when the data driving circuit provides the first pixel voltage to the first data line, the The pre-charging circuit pre-charges the third data line with the first pixel voltage. The pre-charging method according to item 18 of the scope of patent application, wherein when the data driving circuit provides a second pixel voltage to the second data line, the pre-charging circuit uses the second pixel voltage to supply the third pixel voltage to the third data line. The data cable is pre-charged. The pre-charging method described in item 19 of the scope of patent application, further comprising: providing a pre-charging timing control circuit for adjusting the first pixel voltage and the second pixel voltage according to the first pixel voltage and the second pixel voltage. The uniform energy duration of the second control signal.