TWI791242B - Led display panel and driving method thereof - Google Patents

Abstract

A method for driving a LED display panel includes: equally dividing the LED display panel along a scanning direction of the LED display panel to form a plurality of driving units, wherein each driving unit includes a plurality of columns of pulse width modulation pixel circuits; and sequentially enabling each driving unit to form a scan and emission interval of each driving unit; wherein, in the scan and emission interval of each driving unit, the columns of pulse width modulation pixel circuits in each driving unit are first sequentially selected to write with data having the same modulation, and then simultaneously execute a pulse width modulation emission. Thereby, a risk of high driving current can be reduced when the display panel is driven by pulse width modulation, and a design complexity of the driving circuit can be simplified.

Description

Light-emitting diode display panel and driving method thereof

The present invention relates to a display panel and its driving method, in particular to a light-emitting diode display panel driven by pulse width modulation and its driving method.

With the maturity of the manufacturing technology of light-emitting diode (LED) display panels, the technologies for driving the display panels are also diversified. Among them, driving the display panel by pulse width modulation can include the following advantages: high panel gray scale efficiency, panel gray Excellent color shift control, excellent color control, wide adjustable range of panel brightness, etc. However, there are still risk problems such as driving current accumulation and design complexity of the driving circuit.

The light-emitting diode display panel and its driving method provided by the present invention can reduce the risk of large driving current and simplify the design complexity of the driving circuit when driving the light-emitting diode display panel in a pulse width modulation manner.

The light-emitting diode display panel provided by the present invention includes a plurality of drive units, which are equally divided along the scanning direction of the above-mentioned light-emitting diode display panel, wherein each drive unit includes multiple columns of pulse width modulation pixel circuits; Moreover, each driving unit is sequentially enabled to form a scanning light-emitting interval of each driving unit; wherein, in the scanning light-emitting interval of each driving unit, the multiple columns of pulse-width-modulated pixel circuits of the above-mentioned driving unit are first activated Sequentially select to write the same tone data, and then perform pulse width modulation to emit light simultaneously.

The driving method of the light-emitting diode display panel provided by the present invention includes: dividing the above-mentioned light-emitting diode display panel equally along the scanning direction of the above-mentioned light-emitting diode display panel to form a plurality of driving units, wherein each driving unit includes Multi-column pulse width modulation pixel circuit; and sequentially enabling the plurality of driving units to form a scanning light-emitting interval of each driving unit; wherein, in the scanning light-emitting interval of each driving unit, the above-mentioned multi-column pulse width modulation The variable pixel circuits are first sequentially selected to write the same tone data, and then perform pulse width modulation to emit light simultaneously.

In an embodiment of the present invention, the above-mentioned light-emitting diode display panel further includes at least one slope signal selection circuit for sequentially enabling each driving unit to emit light during scanning of each enabled driving unit. In the interval, each column of pulse width modulation pixel circuits is sequentially selected to write the above-mentioned coherence data, and a multi-slope signal is input simultaneously, so that each column of pulse width modulation pixel circuits performs pulse width modulation simultaneously. become glowing.

In an embodiment of the present invention, the slope signal selection circuit includes: a first switch; a second switch; a third switch; a fourth switch; and a fifth switch; wherein each switch has a first end, a second end And the control terminal that determines whether the first terminal and the second terminal are conducting, the first terminal of the first switch is used to receive the above-mentioned multi-slope signal, the second terminal of the first switch, the second terminal of the second switch, and the third switch The first end, the first end of the fourth switch, and the first end of the fifth switch are electrically connected to a first node, the first end of the second switch is used to receive a first DC voltage, and the second end of the third switch terminal, the second terminal of the fourth switch and the second terminal of the fifth switch are used to receive a second DC voltage, wherein the first DC voltage is different from the second DC voltage.

In an embodiment of the present invention, when the plurality of columns of PWM pixel circuits are sequentially selected to write the coherence data, the first switch, the second switch, and the third switch of the slope signal selection circuit and the fifth switch is turned off, and the control end of the fourth switch receives an enabling signal of each column of pulse width modulation pixel circuits to enable the fourth switch to be turned on, so that the second end of the fourth switch receives the second DC voltage And through the first node, the second DC voltage is input to each row of PWM pixel circuits.

In an embodiment of the present invention, when the multi-column PWM pixel circuits are simultaneously input with the multi-slope signals, the second switch, the third switch, the fourth switch and the fifth switch of the slope signal selection circuit is closed, and the control end of the first switch receives a light-emitting signal from each drive unit to enable the first switch to be turned on, so that the first end of the first switch receives the above-mentioned multi-slope signal and inputs the above-mentioned multi-slope signal through the first node Signals to multi-column PWM pixel circuits.

In an embodiment of the present invention, each pulse-width-modulated pixel circuit in the plurality of columns of pulse-width-modulated pixel circuits includes a light-emitting diode and a driving circuit connected to drive the light-emitting diode.

The present invention divides the light-emitting diode display panel into multiple driving units due to the use of the slope signal selection circuit, which can reduce the risk of large driving current and reduce the number of scanning groups when driving the light-emitting diode display panel in a pulse width modulation manner , Simplify the design complexity of the driving circuit to increase the pixel density (PPI).

In order to make the above and other objects, features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

1: LED display panel

2: Timing control circuit

3: Scanning drive circuit

4: Data drive circuit

5: PWM pixel circuit

6: Slope signal selection circuit

51: light emitting diode

52: Drive circuit

61: First switch

62: Second switch

63: The third switch

64: The fourth switch

65: fifth switch

A1[PZi]: the first node

Unit 1~Unit 16: drive unit

PZ 1~PZ 16: scan luminescence interval

SC 1~SC 16: scanning area

EM 1~EM 16: Luminous area

DATA_PWM: coherent data

G1(PZi_n): enable signal

G1(PZi_n-1): enable signal

G2(PZi): enable signal

DC_L: the first DC voltage

DC_H: Second DC voltage

EM[PZ1]: Luminous signal

EM[PZi]: Luminous signal

EM[PZ(i+1)]: Luminous signal

EM[PZ(i-1)]: luminescent signal

MSS: Multiple Slope Signal

PWM current: pulse width modulation current

S1, S3: steps

Fig. 1 is a schematic diagram of a light-emitting diode display panel provided by an embodiment of the present invention; Fig. 2 is a driving unit and its scanning drive provided by an embodiment of the present invention, which are equally divided along the scanning direction of the light-emitting diode display panel A schematic diagram of the light-emitting interval; FIG. 3 is a flowchart of a driving method for a light-emitting diode display panel provided by an embodiment of the present invention; FIG. 4 is a circuit diagram of a slope signal selection circuit provided by an embodiment of the present invention; FIG. 5 is The timing diagram of scanning and lighting of the slope signal selection circuit provided in FIG. 4; FIG. 6 is a schematic diagram of the slope signal selection circuit and the pulse width modulation pixel circuit provided by an embodiment of the present invention; FIG. A schematic diagram of the light-emitting interval; FIG. 8 is a schematic diagram of a slope signal selection circuit and a pulse width modulation pixel circuit provided by another embodiment of the present invention; FIG. 9 is a schematic diagram of the secondary light-emitting interval of FIG. 8; and FIG. 10 is a schematic diagram of FIG. 6 Timing simulation verification diagram.

Hereinafter, the present invention will be described in detail by illustrating various embodiments of the invention by way of drawings. However, inventive concepts may be embodied in many different forms and should not be construed as limited to the illustrative embodiments set forth herein. Furthermore, the same reference numbers may be used to denote similar elements in the drawings.

Please refer to Fig. 1, the light-emitting diode (LED) display panel 1 provided by the present invention includes a timing control circuit 2, a scan drive circuit 3, a data drive circuit 4, and M-column pulse width modulation pixel circuits 5 , wherein the timing controller is connected to the scanning driving circuit 3 and the data driving circuit 4, and the pulse width modulation pixel circuit 5 of M columns is connected to the scanning driving circuit 3 And data drive circuit 4. The timing control circuit 2 is used to control the scanning driving circuit 3 and the data driving circuit 4, and the scanning driving circuit 3 is used to output scanning pulses to drive the scanning lines in the light-emitting diode display panel 1 to load the display data into the corresponding PWM The variable pixel circuit 5, the data driving circuit 4 is used to charge the storage capacitor in the corresponding pulse width modulation pixel circuit 5 according to the data voltage of the display data, and each pulse in the M columns in the light emitting diode display panel 1 The wide modulation pixel circuit 5 is used for emitting light according to the corresponding data voltage. In addition, the LED display panel 1 includes M columns of PWM pixel circuits 5 , for example, for the LED display panel 1 with a resolution of 1920*960, M=960. For the convenience of the following description, the light-emitting diode display panel 1 in FIG. 1 includes an example of 960 columns of PWM pixel circuits for illustration, but the number is not intended to limit the present invention.

Please refer to FIG. 2 and FIG. 3, the light emitting diode display panel 1 includes a plurality of driving units Unit 1 to Unit x equally divided along the scanning direction of the light emitting diode display panel 1, wherein each driving unit Unit 1 to Unit x include multiple columns of PWM pixel circuits 5 (step S1 ), so that the upper limit of the current of each driving unit Unit 1 to Unit x must be less than 10A. In this embodiment, the LED display panel 1 is equally divided into 16 driving units Unit 1 -Unit 16 , but the number is not intended to limit the present invention. Those with ordinary knowledge in this technical field should be able to carry out related designs according to actual needs or applications. For example, the external quantum efficiency (EQE) of the light-emitting diode is 35μA, and the total current of the display panel is 1920*960*35μA=64A. The light emitting diode display panel 1 is equally divided into 16 driving units Unit 1 to Unit 16, so that the current of each driving unit Unit 1 to Unit 16 is 64A/16=4A less than the upper limit of the current. Thereby, the accumulation of large driving current of the LED display panel 1 can be avoided. Moreover, each driving unit Unit 1 to Unit 16 includes 60 (=960/16) columns of PWM pixel circuits 5, and each driving unit Unit 1 to Unit 16 is sequentially enabled to form each driving unit The scanning luminescence interval of PZ1~PZ16, and each scanning light-emitting interval PZ1~PZ16 includes scanning areas SC 1-SC 16 and light-emitting areas EM 1-EM 16 respectively, and firstly, each column of pulse width modulation pixel circuits 5 in each scanning area SC 1- The SC 16 is sequentially selected to write the same tone data, and then each column of pulse-width-modulated pixel circuits 5 simultaneously performs pulse-width-modulated light emission in each light-emitting area EM1-EM16 (step S3), Wherein, the coherence data are display data having the same modulation. In addition, it can be noted that the drive unit Unit 1 has the operation of unwritten data and pulse width modulation light emission in the scanning light-emitting interval PZ9, and other drive units Unit 2~Unit 16 also have the same operation, and the operation of this part will be It will be explained later.

Please refer to FIG. 4 and FIG. 5 at the same time, the light emitting diode display panel 1 also includes at least one slope signal selection circuit 6, which is connected to the pulse width modulation pixel circuits 5 of M columns, and is used to sequentially enable each drive Units Unit 1~Unit 16, so that in each scanning light-emitting interval PZ1~PZ16 of each enabled driving unit Unit 1~Unit 16, the pulse width modulation pixel circuits 5 of each column are sequentially selected to write The coherence data is input, and a multi-slope signal MSS (multi slope signal) is simultaneously input, so that these pulse width modulation pixel circuits 5 simultaneously perform pulse width modulation to emit light. It is worth noting that the slope signal selection circuit 6 of the present invention can divide the LED display panel 1 into a plurality of driving units Unit 1~Unit 16, and divide the scanning light-emitting interval PZ1~PZ16 of each driving unit into Scanning areas SC 1~SC 16 and light emitting areas EM 1~EM 16 can reduce the risk of large driving current, reduce the number of scanning groups, and simplify the design complexity of the driving circuit when driving the light-emitting diode display panel in a pulse width modulation manner to increase pixel density. As shown in FIG. 5 , the slope signal selection circuit 6 enables the driving unit Unit 1, so that the 60 columns of pulse width modulation pixel circuits 5 of the driving unit Unit 1 are selected, and the scanning light emitting interval PZ1 of the driving unit Unit 1 In the scanning area SC 1, the pulse width modulation pixel circuits 5 of each column are sequentially selected to write the coherence data DATA_PWM, and in the drive unit Unit 1 In the light emitting zone EM1 of the scanning light emitting interval PZ1, the pulse width modulation pixel circuits 5 of each column simultaneously input multi-slope signals and perform pulse width modulation to emit light. In addition, the process of enabling the other drive units Unit 2 to Unit 16 by the slope signal selection circuit 6 is the same as that of the slope signal selection circuit 6 for enabling the drive unit Unit 1 , so no more details are given here. It can be noted that the driving unit Unit 9 has unwritten data and pulse-width modulated light-emitting operations in the scanning light-emitting interval PZ1, and the operation of this part will be described later.

The slope signal selection circuit 6 includes a first switch 61 , a second switch 62 , a third switch 63 , a fourth switch 64 , and a fifth switch 65 . Wherein, each switch 61-65 has a first terminal, a second terminal and a control terminal for determining whether the first terminal and the second terminal are turned on. The first terminal of the first switch 61 is used to receive the multi-slope signal MSS. The second terminal of 61, the second terminal of the second switch 62, the first terminal of the third switch 63, the first terminal of the fourth switch 64 and the first terminal of the fifth switch 65 are electrically connected to the first node A1, The first end of the second switch 62 is used to receive a first DC voltage (DC_L), the second end of the third switch 63, the second end of the fourth switch 64 and the second end of the fifth switch 65 are used to receive a first DC voltage (DC_L). The second DC voltage (DC_H), wherein the first DC voltage (DC_L) is different from the second DC voltage (DC_H).

In detail, when the pulse width modulation pixel circuits 5 of each column are sequentially selected to write coherent data, the first switch 61, the second switch 62, the third switch 63 and the first switch 63 of the slope signal selection circuit 6 The fifth switch 65 is turned off, and the control terminal of the fourth switch 64 receives an enabling signal G1 (PZi_n) of each column of PWM pixel circuits to turn on the fourth switch 64, wherein i=1~16, n=1 ~60, so that the second terminal of the fourth switch 64 receives the second DC voltage (DC_H) and inputs the second DC voltage (DC_H) to each column of PWM pixel circuits 5 through the first node A1. When the pulse width modulation pixel circuits 5 of 60 rows are simultaneously input with the multi-slope signal MSS, the second switch 62, the third switch 63, the fourth switch 64 and the fifth switch 65 of the slope signal selection circuit 6 are turned off, and the first switch 61 of the The control end receives a light emitting signal EM[PZ1] from the drive unit Unit 1 to turn on the first switch 61, so that the first end of the first switch 61 receives the multi-slope signal MSS and inputs the multi-slope signal MSS through the first node A1 To each column pulse width modulated pixel circuit 5 .

Please refer to FIG. 6 , the pulse width modulation pixel circuit 5 connected to the slope signal selection circuit 6 is only an example, wherein each of the pulse width modulation pixel circuits 5 in each column includes a light emitting diode 51 and is connected to The drive circuit 52 for driving the light-emitting diode 51, however, its circuit structure and the number and types of components are not intended to limit the present invention, and those skilled in the art can select or design different pulse widths according to actual needs or applications Modulate the pixel circuit. In this embodiment, the control terminal of the first switch 61 in the slope signal selection circuit 6 receives the light emitting signal EM[PZi] of the drive units Unit 1 to Unit 16, and the control terminal of the second switch 62 receives the light signals from the drive units Unit 1 to Unit 16. 16 light emitting signal EM[PZ(i+1)], the control terminal of the third switch 63 receives the light emitting signal EM[PZ(i-1)] of the drive unit Unit 1~Unit 16, and the control terminal of the fourth switch 64 receives It is connected to the enabling signal G1 (PZi_n) of the current column pulse width modulation pixel circuit 5, and the control terminal of the fifth switch 65 receives the enabling signal G1 (PZi_n-1) of the previous column pulse width modulation pixel circuit 5, wherein i=1~16, n=1~60.

Please refer to FIG. 7 , when the light emitting brightness of the light emitting diode display panel 1 is insufficient, the light emitting diode display panel 1 must emit light again. However, the light-emitting diode display panel 1 of this case does not need to reload the coherence data, but the slope signal selection circuit 6 uses the control terminal of the third switch 63 to receive the light-emitting signal EM[PZ(i− 1)], so that the third switch 63 is turned on to input the second direct current voltage (DC_H) to each column of pulse width modulation pixel circuit 5, and each column of pulse width modulation pixel circuit 5 is allowed to input the second direct current voltage (DC_H) again ) to perform pulse width modulation to emit light again, as shown in Figure 2, the drive unit Unit 1 does not write coherence data in the scanning area SC 9 of the scanning light emitting interval PZ9 DATA_PWM and perform pulse width modulation to emit light again in the light-emitting area EM9, and the drive unit Unit 9 in the scanning light-emitting interval PZ1 does not write the coherence data DATA_PWM in the light-emitting area EM 1 is pulse width modulated to emit light.

Please refer to FIG. 8 . Parts of the pins in FIG. 8 that are the same as those in FIG. 6 are marked with the same figure numbers, so the details will not be described in detail here. Wherein, as shown in FIG. 8 , the first terminal of the second switch 62 of the slope signal selection circuit 6 receives the second DC voltage (DC_H) and the control terminal receives the enable signal G2 (PZi) of the driving units Unit 1 to Unit 16, The second terminal of the third switch 63, the second terminal of the fourth switch 64 and the second terminal of the fifth switch 65 are used to receive the first DC voltage (DC_L), and the control terminal of the third switch 63 receives the drive unit Unit 1 ~Emission signal EM[PZ(i+1)] of Unit 16, where i=1~16.

Please refer to FIG. 9 , when the light emitting brightness of the light emitting diode display panel 1 is insufficient, the light emitting diode display panel 1 must emit light again. However, the light-emitting diode display panel 1 of this case does not need to reload the display data, but allows the PWM (pulse width modulation), PAM (pulse amplitude modulation), and EM (luminous signal) in FIG. Bit register signal mode, and a PWM_G boost function is added to lower the loaded data voltage, so that the slope signal selection circuit 6 uses the control terminal of the second switch 62 to receive the enabling of the drive units Unit 1~Unit 16 The signal G2 enables the second switch 62 to be turned on to input the second DC voltage (DC_H) to each column of PWM pixel circuits 5, so that each column of PWM pixel circuits 5 can input the second DC voltage (DC_H) again To perform pulse width modulation to emit light again, as shown in the figure, the drive unit Unit 1 performs pulse width modulation in the light emitting area EM9 again, and as shown in the figure, the drive unit Unit 9 performs pulse width modulation in the light emitting area EM1 become glowing.

Please refer to FIG. 10 , which is a timing simulation verification diagram of FIG. 6 . When the control terminals of the first switch 61 in the slope signal selection circuit 6 respectively receive the drive units Unit 1~Unit When the light-emitting signal EM[PZi] of 16, the first switch 61 is enabled to input the multi-slope signal MSS to each column of pulse width modulation pixel circuits 5 of each drive unit Unit 1~Unit 16, so that the pulse width modulation current (PWM current) output milliampere level, where i=1~16. Through this simulation, the feasibility of dividing the light emitting diode display panel into multiple driving units in the present invention is verified to provide a resolution/high pixel density light emitting diode display panel.

To sum up, because the present invention divides the light-emitting diode display panel into multiple driving units and adopts the slope signal selection circuit, it can reduce the large driving current when driving the light-emitting diode display panel in the way of pulse width modulation. risk, simplify the design complexity of the driving circuit, reduce the number of scanning groups, simplify the design complexity of the driving circuit to increase the pixel density (PPI), and multiple pulse width modulation to increase the light-emitting diode display panel Luminous brightness.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field of the present invention can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

S1, S3: steps

Claims (12)

A light-emitting diode display panel, comprising: a plurality of driving units, which are equally divided along the scanning direction of the light-emitting diode display panel, and each driving unit includes multiple columns of pulse width modulation pixel circuits; at least one oblique The signal selection circuit is used to sequentially enable each of the driving units, so that in the scanning light-emitting interval of each of the enabled driving units, each column of pulse width modulation pixel circuits is sequentially selected to The coherence data is written, and a multi-slant signal is simultaneously input, so that each column of pulse width modulation pixel circuits simultaneously performs pulse width modulation to emit light; wherein, each of the driving units is sequentially driven The scanning light emitting interval of each of the driving units can be formed; wherein, in the scanning light emitting interval of each of the driving units, the plurality of columns of pulse width modulation pixel circuits are first sequentially selected to write the same modulation data, and then simultaneously perform pulse width modulation to emit light; wherein the oblique signal selection circuit includes: a first switch, a second switch, a third switch, a fourth switch and a fifth switch, the first switch, the second Each switch in the second switch, the third switch, the fourth switch, and the fifth switch has a first end, a second end, and a control end for determining whether the first end and the second end are conducting, and the first end of the first switch One end is used to receive the multi-slope signal, the second end of the first switch, the second end of the second switch, the first end of the third switch, the first end of the fourth switch and the fifth The first terminal of the switch is electrically connected to a first node, the first terminal of the second switch is used to receive a first DC voltage, the second terminal of the third switch, the second terminal of the fourth switch and the The second terminal of the fifth switch is used for receiving a second DC voltage, wherein the first DC voltage is different from the second DC voltage. The light-emitting diode display panel as described in Claim 1, wherein when the plurality of columns of PWM pixel circuits are sequentially selected to write the coherence data, the first switch of the slope signal selection circuit , the second switch, the third switch and the fifth switch are turned off, and the control terminal of the fourth switch receives an enable signal of each column of pulse width modulation pixel circuits so that the fourth switch is turned on, so that by The second terminal of the fourth switch receives the second DC voltage and inputs the second DC voltage to each column of PWM pixel circuits through the first node. The light-emitting diode display panel as described in Claim 1, wherein when the multi-column pulse width modulation pixel circuits are simultaneously input with the multi-slope signal, the second switch and the third switch of the slope signal selection circuit The switch, the fourth switch and the fifth switch are turned off, and the control end of the first switch receives a light emitting signal from each of the driving units so that the first switch is turned on, so that the first switch of the first switch One end receives the multi-slope signal and inputs the multi-slope signal to the multi-column PWM pixel circuits through the first node. A driving method of a light-emitting diode display panel, the driving method comprising: dividing the light-emitting diode display panel equally along the scanning direction of the light-emitting diode display panel to form a plurality of driving units, wherein each driving unit includes Multiple columns of pulse width modulation pixel circuits; and sequentially enabling each of the driving units to form a scanning light-emitting interval of each of the driving units; wherein, in the scanning light-emitting interval of each of the driving units, the The plurality of columns of PWM pixel circuits are first sequentially selected to write the same tone data, and then perform pulse width modulation to emit light simultaneously; Wherein the light emitting diode display panel further includes at least one oblique signal selection circuit for sequentially enabling each of the driving units, so that in the scanning light-emitting interval of each of the enabled driving units, Each column of pulse width modulation pixel circuits is sequentially selected to write the coherence data, and simultaneously input a multi-slope signal, so that each column of pulse width modulation pixel circuits simultaneously performs pulse width modulation to emit light ; Wherein the inclined signal selection circuit includes: a first switch, a second switch, a third switch, a fourth switch and a fifth switch, the first switch, the second switch, the third switch, the fourth switch and Each switch in the fifth switch has a first end, a second end, and a control end for determining whether the first end and the second end are turned on. The first end of the first switch is used to receive the multi-slant signal, and the first end is used to receive the multi-slope signal. The second end of a switch, the second end of the second switch, the first end of the third switch, the first end of the fourth switch, and the first end of the fifth switch are electrically connected to a first node , the first end of the second switch is used to receive a first DC voltage, the second end of the third switch, the second end of the fourth switch and the second end of the fifth switch are used to receive a second a DC voltage, wherein the first DC voltage is different from the second DC voltage. The driving method as described in claim 4, wherein when the plurality of rows of pulse-width-modulated pixel circuits are sequentially selected to write the coherence data, the first switch and the second switch of the slope signal selection circuit The switch, the third switch and the fifth switch are turned off, and the control terminal of the fourth switch receives an enable signal of each column of pulse width modulation pixel circuits so that the fourth switch is turned on, so that the fourth switch The second terminal of the second terminal receives the second direct current voltage and inputs the second direct current voltage to each column of pulse width modulation pixel circuits through the first node. The driving method as described in Claim 4, wherein when the multi-column pulse width modulation pixel circuits are simultaneously input with the multi-slope signal, the second switch and the third switch of the slope signal selection circuit off, the fourth switch and the fifth switch are turned off, and the control end of the first switch receives a light-emitting signal from each of the driving units to turn on the first switch, so that the first switch of the first switch One end receives the multi-slope signal and inputs the multi-slope signal to the multi-column PWM pixel circuits through the first node. A light-emitting diode display panel, comprising: a plurality of driving units, equally divided along the scanning direction of the light-emitting diode display panel, each driving unit includes multiple columns of pulse width modulation pixel circuits; and at least one slope The signal selection circuit is used to sequentially enable each of the driving units, so that in the scanning light-emitting interval of each of the enabled driving units, each column of pulse width modulation pixel circuits is sequentially selected to The coherence data is written, and a multi-slope signal is simultaneously input, so that each column of pulse width modulation pixel circuits simultaneously performs pulse width modulation to emit light; wherein, each of the driving units is sequentially enabled to form a scanning light-emitting interval of each of the driving units; wherein, in the scanning light-emitting interval of each of the driving units, the plurality of columns of pulse-width-modulated pixel circuits are first sequentially selected to write in the same tone data, and then perform pulse width modulation to emit light simultaneously; wherein each pulse width modulation pixel circuit in the plurality of columns of pulse width modulation pixel circuits includes a light emitting diode and is connected to drive the light emitting diode A driving circuit; wherein the inclined signal selection circuit includes: a first switch, a second switch, a third switch, a fourth switch and a fifth switch, the first switch, the second switch, the third switch, the first Each of the four switches and the fifth switch has a first end, a second end, and a control end for determining whether the first end and the second end are turned on, and the first end of the first switch is used to receive the multi-slope signal , the first The second end of the switch, the second end of the second switch, the first end of the third switch, the first end of the fourth switch, and the first end of the fifth switch are electrically connected to a first node, The first terminal of the second switch is used to receive a first DC voltage, the second terminal of the third switch, the second terminal of the fourth switch and the second terminal of the fifth switch are used to receive a second DC voltage voltage, wherein the first DC voltage is different from the second DC voltage. The light-emitting diode display panel as described in claim 7, wherein when the plurality of columns of pulse-width-modulated pixel circuits are sequentially selected to write the coherence data, the first switch of the slope signal selection circuit , the second switch, the third switch and the fifth switch are turned off, and the control terminal of the fourth switch receives an enable signal of each column of pulse width modulation pixel circuits so that the fourth switch is turned on, so that by The second terminal of the fourth switch receives the second DC voltage and inputs the second DC voltage to each column of PWM pixel circuits through the first node. The light emitting diode display panel as described in claim 7, wherein when the multi-column pulse width modulation pixel circuits are simultaneously input with the multi-slope signal, the second switch and the third switch of the slope signal selection circuit The switch, the fourth switch and the fifth switch are turned off, and the control end of the first switch receives a light emitting signal from each of the driving units so that the first switch is turned on, so that the first switch of the first switch One end receives the multi-slope signal and inputs the multi-slope signal to the multi-column PWM pixel circuits through the first node. A driving method of a light-emitting diode display panel, the driving method comprising: dividing the light-emitting diode display panel equally along the scanning direction of the light-emitting diode display panel to form a plurality of driving units, wherein each driving unit includes multiple columns of pulse width modulated pixel circuitry; and Enabling each of the driving units sequentially to form a scanning light-emitting interval of each of the driving units; wherein, in the scanning light-emitting interval of each of the driving units, the plurality of columns of pulse-width-modulated pixel circuits first are sequentially selected to write the same tone data, and then perform pulse width modulation to emit light simultaneously; wherein each pulse width modulation pixel circuit in the plurality of columns of pulse width modulation pixel circuits includes a light emitting diode body and a driving circuit connected to drive the light emitting diode, wherein the light emitting diode display panel further includes at least one slope signal selection circuit for sequentially enabling each of the driving units to be enabled In the scanning light-emitting interval of each of these driving units, each column of pulse width modulated pixel circuits is sequentially selected to write the coherence data, and a multi-slope signal is simultaneously input to make the pulse width of each column The modulation pixel circuit simultaneously performs pulse width modulation to emit light; wherein the oblique signal selection circuit includes: a first switch, a second switch, a third switch, a fourth switch and a fifth switch, the first switch, the second Each switch in the switch, the third switch, the fourth switch and the fifth switch has a first terminal, a second terminal and a control terminal for determining whether the first terminal and the second terminal are conducting. The first switch of the first switch terminal for receiving the multi-slope signal, the second terminal of the first switch, the second terminal of the second switch, the first terminal of the third switch, the first terminal of the fourth switch and the fifth switch The first end of the second switch is electrically connected to a first node, the first end of the second switch is used to receive a first DC voltage, the second end of the third switch, the second end of the fourth switch and the first The second terminal of the five switches is used for receiving a second DC voltage, wherein the first DC voltage is different from the second DC voltage. The driving method as described in claim 10, wherein when the plurality of columns of pulse-width-modulated pixel circuits are sequentially selected to write the coherence data, the first switch and the second switch of the slope signal selection circuit The switch, the third switch and the fifth switch are turned off, and the control terminal of the fourth switch receives an enable signal of each column of pulse width modulation pixel circuits so that the fourth switch is turned on, so that the fourth switch The second terminal of the second terminal receives the second direct current voltage and inputs the second direct current voltage to each column of pulse width modulation pixel circuits through the first node. The driving method according to claim 10, wherein when the multi-column pulse width modulation pixel circuits are simultaneously input with the multi-slope signal, the second switch, the third switch, and the second switch of the slope signal selection circuit The four switches and the fifth switch are turned off, and the control terminal of the first switch receives a light emitting signal from each of the driving units, so that the first switch is turned on, so that the first terminal of the first switch receives the The multi-slope signal is input to the multi-column PWM pixel circuits through the first node.

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