Display devices and related driving methods that can improve ghosting phenomenon

Abstract

This invention provides a display device comprising multiple rows of light-emitting elements, multiple columns of light-emitting elements, and a row driving circuit. The cathodes of the first column of light-emitting elements are coupled to a first character line, while the anodes of the second column of light-emitting elements are coupled to a second character line. In the m-th column of light-emitting elements, the anode of the first light-emitting element in the first column is coupled to the cathode of the second light-emitting element in the second column. The row driving circuit includes a selection switch and two multiplexers. The selection switch controls the signal transmission path between an input signal and the m-th column of light-emitting elements. The first multiplexer provides a first driving signal to power the parasitic capacitance of the selection switch and the first light-emitting element during a first driving cycle. The second multiplexer provides a second driving signal to power the second light-emitting element during a second driving cycle and to discharge the parasitic capacitance of the selection switch.

Description

Technical Field

[0001] The present invention provides a display device and a related driving method, particularly a display device and a related driving method that can improve the ghosting phenomenon. Background Technology

[0002] Compared to traditional incandescent light bulbs, light-emitting diodes (LEDs) offer advantages such as low power consumption, long lifespan, small size, no warm-up time, and fast response. They can also be manufactured into extremely small or arrayed components to meet specific application requirements. Besides outdoor displays, traffic lights, and backlighting for LCD screens in various consumer electronics products such as mobile phones, laptops, and televisions, LEDs are widely used in various indoor and outdoor lighting fixtures to replace fluorescent tubes or incandescent bulbs.

[0003] Figure 1 This is a schematic diagram of a prior art display device 10. The display device 10 includes a light-emitting element array 110, a column driving circuit 120, and row driving circuits 130. The light-emitting element array 110 includes a plurality of light-emitting elements PX11-PX1M, which are coupled to the column driving circuit 120 through N row character lines WL1-WLN and coupled to the row driving circuit 130 through M column character lines BL1-BLM. The light-emitting elements PX11-PX1M can be light-emitting diodes, and the light-emitting element array 110 adopts a common cathode architecture, that is, the cathodes of the light-emitting elements in the same column are coupled to the same character line.

[0004] The column driver circuit 120 includes switches SR1-SRN, which can respectively turn on or off the signal transmission path between the drive voltage VBB and the word lines WL1-WLN according to the control signals GR1-GRN. The drive voltage VBB is periodically supplied to each word line, and only one word line is supplied with drive voltage VBB at a time. The row driver circuit 130 includes switches SC1-SCM, which can respectively turn on or off the signal transmission path between the current source IS1-ISM and the bit lines BL1-BLM according to the control signals GC1-GCM, thereby driving the corresponding light-emitting elements to emit light.

[0005] Due to the layout of the metal conductors, parasitic capacitance exists in both the column drive circuit 120 and the row drive circuit 130, which can cause ghosting in multi-line scanning drive modes. For example, when character line WL1 is driven, switch SR1 is turned on, and switches SC1-SCM sequentially turn on and off to illuminate PX11-PX1M. During the on period, the parasitic capacitance of switches SC1-SCM is powered to a specific alignment. Then, when column drive character line WL2 is switched, switch SR2 is turned on, and switches SC1-SCM sequentially turn on and off to illuminate PX21-PX2M. At this time, the stored charge in the parasitic capacitance of switches SC1-SCM will discharge to the light-emitting elements, causing the light-emitting elements PX11-PX1M that should not be lit to be dimly lit. This ghosting phenomenon will affect the display quality of the display device 10. Summary of the Invention

[0006] The purpose of this invention is to provide a display device and driving method that can improve ghosting and thus enhance display quality.

[0007] To achieve the above objectives, the present invention provides a display device for improving ghosting phenomena, comprising: an array of light-emitting elements, including M columns of light-emitting elements and N rows of light-emitting elements, wherein: in the nth row of light-emitting elements in the N rows of light-emitting elements, the cathode of each light-emitting element is commonly coupled to the nth character line; in the (n+1)th row of light-emitting elements in the N rows of light-emitting elements, the anode of each light-emitting element is commonly coupled to the (n+1)th character line; in the mth column of light-emitting elements in the M columns of light-emitting elements, the anode of the first light-emitting element located in the nth row is coupled to the cathode of the second light-emitting element located in the (n+1)th row; M and N are integers greater than 1; m is an integer between 1 and M; n is an integer between 1 and N. Odd numbers between -1; and a row drive circuit comprising: M selector switches for controlling the signal transmission path between the input signal and the M columns of light-emitting elements, wherein the m-th selector switch among the M selector switches controls the signal transmission path between the input signal and the m-th column of light-emitting elements; a first multiplexer for providing a first drive signal based on a first address signal to power the parasitic capacitance of the m-th selector switch and the first light-emitting element during a first drive cycle; and a second multiplexer for providing a second drive signal based on a second address signal to power the second light-emitting element and discharge the parasitic capacitance of the m-th selector switch during a second drive cycle following the first drive cycle.

[0008] Preferably, the first multiplexer includes: a first input terminal coupled to the input signal; a second input terminal coupled to a ground voltage; a control terminal coupled to the first address signal; and an output terminal for outputting the first drive signal; and the second multiplexer includes: a first input terminal coupled to the input signal; a second input terminal coupled to the ground voltage; a control terminal coupled to the second address signal; and an output terminal coupled to the nth word line and the (n+1)th word line.

[0009] Preferably, the m-th selector switch includes: a first terminal coupled to the output terminal of the first multiplexer; a second terminal coupled to the anode of the first light-emitting element and the cathode of the second light-emitting element; and a control terminal coupled to a control signal.

[0010] Preferably, the first address signal and the second address signal are each periodic signals that switch between a first potential and a second potential; the first multiplexer selectively outputs the input signal or the ground voltage according to the first address signal to provide the first drive signal; the second multiplexer selectively outputs the input signal or the ground voltage according to the second address signal to provide the second drive signal; the first potential is higher than the second potential; and the first address signal and the second address signal are out of phase.

[0011] Preferably, during the first drive cycle, when the first address signal has the second potential and when the second address signal has the first potential, the first multiplexer outputs the first drive signal with the first potential to the first terminal of the m-th selector switch, and the n-th word line is coupled to the ground voltage via the second multiplexer; and during the second drive cycle, when the first address signal has the first potential and when the second address signal has the second potential, the second multiplexer outputs the second drive signal with the first potential to the (n+1)-th word line, and the first terminal of the m-th selector switch is coupled to the ground voltage via the first multiplexer.

[0012] Preferably, during the first driving cycle, when the m-th selector switch is turned on by the control signal corresponding to the m-th column of light-emitting elements, the first driving signal with the first potential is transmitted to the anode of the first light-emitting element through the m-th selector switch, and the cathode of the first light-emitting element is coupled to the second driving signal with the second potential via the n-th character line, thereby supplying power to the parasitic capacitance of the m-th selector switch and the first light-emitting element; and

[0013] During the second driving cycle, when the m-th selector switch is turned on by the control signal corresponding to the m-th column of light-emitting elements, the second driving signal with the first potential is transmitted to the anode of the second light-emitting element via the (n+1)-th character line, and the cathode of the second light-emitting element is coupled to the first driving signal with the second potential through the m-th selector switch, thereby supplying power to the second light-emitting element and discharging the parasitic capacitance of the m-th selector switch.

[0014] Preferably, the first multiplexer further includes a first delay circuit, disposed between the first input terminal and the output terminal of the first multiplexer; and

[0015] The second multiplexer further includes a second delay circuit disposed between the first input terminal and the output terminal of the second multiplexer.

[0016] Preferably, at a first time point when the first address signal switches from the first potential to the second potential, the first delay circuit is used to delay the signal transmission from the first input terminal to the output terminal of the first multiplexer, so that the first drive signal completely switches from the second potential to the first potential at a second time point; and

[0017] At the third time point, when the second address signal switches from the first potential to the second potential, the second delay circuit is used to delay the signal transmission from the first input terminal of the second multiplexer to the output terminal of the second multiplexer, so that the second drive signal completely switches from the second potential to the first potential at the fourth time point.

[0018] Preferably, the plurality of light-emitting elements comprises sub-millimeter light-emitting diodes or micro light-emitting diodes.

[0019] To achieve the above objectives, the present invention also provides a driving method for improving ghosting phenomena, comprising: during a first driving cycle, a first multiplexer in a display device outputs a first driving signal with a first potential according to a first address signal, and activates a selection switch to transmit the first driving signal to the anode of a first light-emitting element in the display device; and a second multiplexer in the display device outputs a second driving signal with a second potential to the cathode of the first light-emitting element according to a second address signal; during a second driving cycle following the first driving cycle, the second multiplexer outputs the second driving signal with the first potential to the anode of a second light-emitting element in the display device according to the second address signal, and the first multiplexer outputs the first driving signal with the second potential according to the first address signal, and activates the selection switch to transmit the first driving signal to the cathode of the second light-emitting element. The cathode of the light-emitting element, wherein: the first potential is higher than the second potential; the display device further includes a plurality of light-emitting elements arranged in an array comprising M columns and N rows; in the nth row of the N rows of light-emitting elements, the cathode of each light-emitting element is commonly coupled to the nth character line; in the (n+1)th row of the N rows of light-emitting elements, the anode of each light-emitting element is commonly coupled to the (n+1)th character line; the first light-emitting element is located in the mth column of the M columns and the nth row of the N rows of the light-emitting element array; the second light-emitting element is located in the mth column of the M columns and the (n+1)th row of the N rows of the light-emitting element array; the anode of the first light-emitting element is coupled to the cathode of the second light-emitting element; M and N are integers greater than 1; m is an integer between 1 and M; and n is an odd number between 1 and N-1.

[0020] Preferably, the driving method further includes: coupling a first input terminal of the first multiplexer to an input signal; coupling a second input terminal of the first multiplexer to a ground voltage; coupling a control terminal of the first multiplexer to the first address signal; the first multiplexer providing the first drive signal at its output terminal; coupling a first input terminal of the second multiplexer to the input signal; coupling a second input terminal of the second multiplexer to the ground voltage; coupling a control terminal of the second multiplexer to the second address signal; and selectively coupling the output terminal of the second multiplexer to the nth word line and the (n+1)th word line.

[0021] Preferably, the driving method further includes: coupling a first terminal of the selection switch to the output terminal of the first multiplexer; coupling a second terminal of the selection switch to the anode of the first light-emitting element and the cathode of the second light-emitting element; and coupling a control terminal of the selection switch to a control signal.

[0022] Preferably, the driving method further includes: providing a first address signal and a second address signal that periodically switch between the first potential and the second potential; the first multiplexer selectively outputting the input signal or the ground voltage according to the first address signal to provide the first driving signal; the second multiplexer selectively outputting the input signal or the ground voltage according to the second address signal to provide the second driving signal; the first potential being higher than the second potential; and the first address signal and the second address signal being out of phase.

[0023] Preferably, the driving method further includes: during the first driving cycle, when the first address signal has the second potential and when the second address signal has the first potential, the first multiplexer outputs the first driving signal with the first potential to the first terminal of the selection switch, and the second multiplexer outputs the second driving signal with the second potential to the nth word line; and during the second driving cycle, when the first address signal has the first potential and when the second address signal has the second potential, the first multiplexer outputs the second driving signal with the second potential to the (n+1)th word line, and the second multiplexer outputs the second driving signal with the first potential to the first terminal of the selection switch.

[0024] Preferably, the driving method further includes: during the first driving cycle, when the selection switch is turned on by the control signal corresponding to the first light-emitting element, transmitting the first driving signal with the first potential to the anode of the first light-emitting element through the selection switch, and transmitting the second driving signal with the second potential to the cathode of the first light-emitting element through the nth character line, thereby supplying power to the parasitic capacitance of the selection switch and the first light-emitting element; and

[0025] During the second driving cycle, when the selection switch is turned on by the switch control signal corresponding to the second light-emitting element, the second driving signal with the first potential is transmitted to the anode of the second light-emitting element via the (n+1)th character line, and the first driving signal with the second potential is transmitted to the cathode of the second light-emitting element via the selection switch, thereby powering the second light-emitting element and discharging the parasitic capacitance of the selection switch.

[0026] Preferably, the plurality of light-emitting elements comprises sub-millimeter light-emitting diodes or micro light-emitting diodes. Compared with the prior art, the display device of the present invention, through the coupling method of the light-emitting elements in the light-emitting element array and the two multiplexers in the row driving circuit, enables the switching parasitic capacitance of the light-emitting elements in the previous row to be discharged when a specific row of light-emitting elements is lit, thereby improving the ghosting phenomenon and enhancing the display quality. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a display device in the prior art.

[0028] Figure 2 This is a schematic diagram of a display device that can improve ghosting phenomena according to an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of the relevant signal waveforms when the display device is in operation, as shown in an embodiment of the present invention.

[0030] Figures 4A to 4D This is a schematic diagram of the display device in operation according to an embodiment of the present invention. Detailed Implementation

[0031] To provide a further understanding of the purpose, structure, features, and functions of the present invention, detailed descriptions are provided below with reference to specific embodiments.

[0032] Figure 2 This is a schematic diagram of a display device 20 that can improve ghosting in an embodiment of the present invention. The display device 20 includes a light-emitting element array 210, a column driving circuit 220, and a row driving circuit 230. The light-emitting element array 210 includes M columns of light-emitting elements and N rows of light-emitting elements PX11-PXNM, which are coupled to the column driving circuit 220 through N row character lines WL1-WLN and coupled to the row driving circuit 230 through M column character lines BL1-BLM, where M and N are integers greater than 1. In one embodiment, M is a multiple of 3, and the light-emitting elements PX11-PXN1 in the first row are red light-emitting elements, the light-emitting elements PX12-PXN2 in the second row are green light-emitting elements, and the light-emitting elements PX13-PXN3 in the third row are blue light-emitting elements, and so on. In one embodiment, the light-emitting elements PX11-PXNM include light-emitting diodes (LEDs), such as mini LEDs, micro LEDs, or any combination of the above elements. However, the number, type, and arrangement of the light-emitting elements in the light-emitting element array 10 do not limit the scope of the present invention.

[0033] In the first to Nth rows of light-emitting elements in the light-emitting element array 210 of the present invention, the anodes of the odd-numbered columns of light-emitting elements are respectively coupled to the corresponding bit lines in the bit lines BL1-BLM, and the cathodes of the odd-numbered columns of light-emitting elements are coupled to each other. The cathodes of the even-numbered columns of light-emitting elements are respectively coupled to the corresponding bit lines in the bit lines BL1-BLM, and the anodes of the even-numbered columns of light-emitting elements are coupled to each other. For example, the anodes of the first column of light-emitting elements PX11-PX1M are respectively coupled to the bit lines BL1-BLM, and the cathodes of the first column of light-emitting elements PX11-PX1M are coupled to each other; the cathodes of the second column of light-emitting elements PX21-PX2M are respectively coupled to the bit lines BL1-BLM, and the anodes of the second column of light-emitting elements PX21-PX2M are coupled to each other.

[0034] In the first to M columns of light-emitting elements in the light-emitting element array 210 of the present invention, the anode of the light-emitting element located in the odd-numbered column is coupled to the cathode of the light-emitting element located in the adjacent even-numbered column. For example, in the first row of light-emitting elements PX11-PXN1, the anode of the light-emitting element PX11 located in the first column is coupled to the cathode of the light-emitting element PX12 located in the second column.

[0035] In the display device 20 of the present invention, the column driving circuit 220 includes multiple selection switches SR1-SRN, and the row driving circuit 230 includes a current source IS, two multiplexers MUX1 and MUX2, and multiple selection switches SC1-SCM. The first input terminal IN1 of multiplexer MUX1 is coupled to the current source IS, the second input terminal IN2 is coupled to the ground voltage GND, the control terminal is coupled to the first address signal ADD1, and the output terminal OUT is used to output the first drive signal S1. The first input terminal IN1 of multiplexer MUX2 is coupled to the current source IS, the second input terminal IN2 is coupled to the ground voltage GND, and the control terminal is coupled to the second address signal ADD2. Multiplexer MUX1 selectively couples its first input terminal IN1 to the output terminal OUT or its second input terminal IN2 to the output terminal OUT according to the first address signal ADD1, thereby using the input signal provided by the current source IS or the ground voltage GND as the first drive signal S1. The multiplexer MUX2 will selectively couple its first input terminal IN1 to the output terminal OUT or its second input terminal IN2 to the output terminal OUT according to the second address signal ADD2, and then use the input signal provided by the current source IS or the ground voltage GND as the second drive signal S2.

[0036] The first terminal of the selector switch SC1-SCM is coupled to the output terminal OUT of the multiplexer MUX1, and the second terminal is coupled to the first to the Mth columns of light-emitting elements, respectively. The control terminals are coupled to control signals GC1-GCM. The first terminal of the selector switch SR1-SRM is coupled to the output terminal OUT of the multiplexer MUX2, and the second terminal is coupled to character lines WL1-WLN, respectively. The control terminals are coupled to control signals GR1-GRN, respectively. In this invention, the selector switch SC1-SCM controls the signal transmission path between the first driving signal S1 and the M columns of light-emitting elements according to the control signals GC1-GCM, while the selector switch SR1-SRN controls the signal transmission path between the second driving signal S2 and the N rows of light-emitting elements according to the control signals GR1-GRN.

[0037] Figure 3 This is a schematic diagram of the relevant signal waveforms when the display device 20 is in operation, according to an embodiment of the present invention. Figure 3 The waveforms of the first address signal ADD1, the second address signal ADD2, the first drive signal S1, and the second drive signal S2 are displayed, where T1-TP represents the drive period (P is an integer greater than 1). In this invention, the first address signal ADD1 and the second address signal ADD2 periodically switch between a first potential (e.g., high potential) and a second potential (e.g., low potential), wherein the first address signal ADD1 and the second address signal ADD2 have different potentials within the same period. More specifically, when the first address signal ADD1 or the second address signal ADD2 has a second potential (e.g., low potential), the multiplexer MUX1 or MUX2 will couple its first input terminal IN1 to the output terminal OUT, so that the first drive signal S1 or the second drive signal S2 is supplied by the current source IS (with a high potential); when the first address signal ADD1 or the second address signal ADD2 has a first potential (e.g., high potential), the multiplexer MUX1 or MUX2 will couple its second input terminal IN2 to the output terminal OUT, so that the first drive signal S1 or the second drive signal S2 is supplied by the ground voltage GND (with a low potential).

[0038] like Figure 3 As shown, during odd-numbered cycles, when the first address signal ADD1 is low and the second address signal ADD2 is high, the first drive signal S1 output by multiplexer MUX1 is a high-potential signal supplied by current source IS, while the second drive signal S2 output by multiplexer MUX2 is a low-potential signal supplied by ground voltage GND. During even-numbered cycles, when the first address signal ADD1 is high and the second address signal ADD2 is low, the first drive signal S1 output by multiplexer MUX1 is a low-potential signal supplied by ground voltage GND, while the second drive signal S2 output by multiplexer MUX2 is a high-potential signal supplied by current source IS.

[0039] Figures 4A-4D The figure is a schematic diagram of the display device 20 in operation according to an embodiment of the present invention. For the sake of simplicity, Figures 4A-4D The diagram only shows the structure of the first and second rows of light-emitting elements, where Figure 4A This shows the operation of the display device 20 within period T1. Figure 4B This shows the operation of the display device 20 during period T2. Figure 4C The operation of display device 20 during period T3 is shown, and Figure 4D The operation of display device 20 during cycle T4 is shown.

[0040] like Figure 3 and Figure 4A As shown, during period T1, the output terminal OUT of multiplexer MUX1 is coupled to the current source IS through its first input terminal IN1, while the output terminal OUT of multiplexer MUX2 is coupled to the ground voltage GND through its second input terminal IN2. At this time, the control signal GC1 with an enable potential turns on the selector switch SC1, the control signal GC2 with a deactivation potential turns off the selector switch SC2, the control signal GR1 with an enable potential turns on the selector switch SR1, and the control signal GR2-GRN with a deactivation potential turns off the selector switch SR2-SRN. Therefore, the first drive signal S1 with a high potential flows from the output terminal OUT of multiplexer MUX1 through the conducting selector switches SC1 and SR1, the output terminal OUT of multiplexer MUX2, and the second input terminal IN2 of multiplexer MUX2 to the ground voltage GND, thereby lighting up the light-emitting element PX11 and supplying power to the parasitic capacitance C1 of selector switch SC1. Figure 4A The arrow symbol in the image is shown.

[0041] like Figure 3 and Figure 4B As shown, during period T2, the output terminal OUT of multiplexer MUX1 is coupled to ground voltage GND through the second input terminal IN2, while the output terminal OUT of multiplexer MUX2 is coupled to current source IS through its first input terminal IN1. At this time, the control signal GC1 with an enable potential turns on selector switch SC1, the control signal GC2 with a deactivation potential turns off selector switch SC2, the control signal GR2 with an enable potential turns on selector switch SR2, and the control signals GR1 and GR3-GRN with deactivation potentials turn off selector switches SR1 and SR3-SRN. Therefore, the second drive signal S2 with a high potential flows from the output terminal OUT of multiplexer MUX2 through the conducting selector switches SR2 and SC1, the output terminal OUT of multiplexer MUX1, and the second input terminal IN2 of multiplexer MUX1 to ground voltage GND, thereby lighting up the light-emitting element PX21 and discharging the parasitic capacitance C1 of selector switch SC1. Figure 4BThe arrow symbol in the image is shown.

[0042] like Figure 3 and Figure 4C As shown, during period T3, the output terminal OUT of multiplexer MUX1 is coupled to the current source IS through its first input terminal IN1, while the output terminal OUT of multiplexer MUX2 is coupled to the ground voltage GND through its second input terminal IN2. At this time, the control signal GC1 with a deactivation potential will turn off the selector switch SC1, the control signal GC2 with an enable potential will turn on the selector switch SC2, the control signal GR1 with an enable potential will turn on the selector switch SR1, and the control signal GR2-GRN with a deactivation potential will turn off the selector switch SR2-SRN. Therefore, the first drive signal S1 with a high potential flows from the output terminal OUT of multiplexer MUX1 through the conducting selector switches SC2 and SR1, the output terminal OUT of multiplexer MUX2, and the second input terminal IN2 of multiplexer MUX2 to the ground voltage GND, thereby lighting up the light-emitting element PX12 and supplying power to the parasitic capacitance C2 of selector switch SC2. Figure 4C As indicated by the arrow symbol in the diagram. Since the parasitic capacitance C1 of the selector switch SC1 was discharged by the second drive signal S2 in the previous cycle T2, there is no residual charge in the off state, and no ghosting will occur.

[0043] like Figure 3 and Figure 4D As shown, during period T4, the output terminal OUT of multiplexer MUX1 is coupled to ground voltage GND through the second input terminal IN2, while the output terminal OUT of multiplexer MUX2 is coupled to current source IS through its first input terminal IN1. At this time, the control signal GC1 with a deactivation potential will turn off selector switch SC1, the control signal GC2 with an enable potential will turn on selector switch SC2, the control signal GR2 with an enable potential will turn on selector switch SR2, and the control signals GR1 and GR3-GRN with deactivation potentials will turn off selector switches SR1 and SR3-SRN. Therefore, the second drive signal S2 with a high potential flows from the output terminal OUT of multiplexer MUX2 through the conducting selector switches SR2 and SC2, the output terminal OUT of multiplexer MUX1, and the second input terminal IN2 of multiplexer MUX1 to ground voltage GND, thereby lighting up the light-emitting element PX22 and discharging the parasitic capacitance C2 of selector switch SC2. Figure 4D As indicated by the arrow symbol in the diagram. In this way, the parasitic capacitance C2 of selector switch SC2 will have no residual charge in the next drive cycle, and no ghosting will occur.

[0044] In this invention, the first multiplexer MUX1 may further include a first delay circuit (not shown), disposed between the first input terminal IN1 and the output terminal OUT of the first multiplexer MUX1, for delaying the signal transmission from the first input terminal IN1 to the output terminal OUT of the first multiplexer MUX1; the second multiplexer MUX2 may further include a second delay circuit (not shown), disposed between the first input terminal IN1 and the output terminal OUT of the second multiplexer MUX2, for delaying the signal transmission from the first input terminal IN1 to the output terminal OUT of the second multiplexer MUX2. Figure 3 As shown, at time t1 when the first address signal ADD1 switches from a high level to a low level, the first delay circuit can delay the signal transmission from the first input terminal IN1 to the output terminal OUT of the first multiplexer MUX1, so that the first drive signal S1 will not fully switch from a low level to a high level until time t2, where time t1 is earlier than time t2. Similarly, at time t3 when the second address signal ADD2 switches from a high level to a low level, the second delay circuit can delay the signal transmission from the first input terminal IN1 to the output terminal OUT of the second multiplexer MUX2, so that the second drive signal S2 will not fully switch from a low level to a high level until time t4, where time t3 is earlier than time t4.

[0045] In summary, the display device of the present invention, through the coupling method of the light-emitting elements in the light-emitting element array and the two multiplexers in the row driving circuit, enables the switching parasitic capacitance of the light-emitting elements in the previous row to be discharged when a specific row of light-emitting elements is lit, thereby improving the ghosting phenomenon and enhancing the display quality.

[0046] The present invention has been described in the above-described embodiments; however, these embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. Conversely, any modifications and refinements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A display device for improving ghosting phenomena, characterized in that, Include: An array of light-emitting elements, comprising M columns of light-emitting elements and N rows of light-emitting elements, wherein: In the nth row of light-emitting elements in the N rows of light-emitting elements, the cathode of each light-emitting element is commonly coupled to the nth character line; In the (n+1)th row of light-emitting elements in the N rows of light-emitting elements, the anode of each light-emitting element is commonly coupled to the (n+1)th character line; In the m-th column of the M-th column of light-emitting elements, the anode of the first light-emitting element located in the n-th row is coupled to the cathode of the second light-emitting element located in the (n+1)-th row; M and N are integers greater than 1; m is an integer between 1 and M; n is an odd number between 1 and N-1; and The line drive circuit includes: M selector switches are used to control the signal transmission path between the input signal and the M columns of light-emitting elements, wherein the m-th selector switch among the M selector switches controls the signal transmission path between the input signal and the m-th column of light-emitting elements; A first multiplexer is configured to provide a first drive signal based on the first address signal, so as to supply power to the parasitic capacitance of the m-th selector switch and the first light-emitting element during the first drive cycle; and The second multiplexer is used to provide a second drive signal based on the second address signal, so as to power the second light-emitting element in the second drive cycle following the first drive cycle, and to discharge the parasitic capacitance of the m-th selector switch.

2. The display device as claimed in claim 1, characterized in that: The first multiplexer includes: The first input terminal is coupled to the input signal; The second input terminal is coupled to a ground voltage; The control terminal is coupled to the first address signal; as well as The output terminal is used to output the first drive signal; as well as The second multiplexer includes: The first input terminal is coupled to the input signal; The second input terminal is coupled to the ground voltage; The control terminal is coupled to the second address signal; as well as The output is coupled to the nth character line and the (n+1)th character line.

3. The display device as described in claim 2, characterized in that: The m-th selection switch includes: The first end is coupled to the output end of the first multiplexer; The second end is coupled to the anode of the first light-emitting element and the cathode of the second light-emitting element; as well as The control terminal is coupled to a control signal.

4. The display device as claimed in claim 3, characterized in that: The first address signal and the second address signal are each periodic signals that switch between a first potential and a second potential; The first multiplexer selectively outputs the input signal or the ground voltage based on the first address signal to provide the first drive signal; The second multiplexer selectively outputs the input signal or the ground voltage based on the second address signal to provide the second drive signal; The first potential is higher than the second potential; and The first address signal and the second address signal are out of phase.

5. The display device as claimed in claim 4, characterized in that: During the first drive cycle, when the first address signal has the second potential and when the second address signal has the first potential, the first multiplexer outputs the first drive signal with the first potential to the first terminal of the m-th selector switch, and the n-th word line is coupled to the ground voltage via the second multiplexer; and During the second drive cycle, when the first address signal has the first potential and when the second address signal has the second potential, the second multiplexer outputs the second drive signal with the first potential to the (n+1)th character line, and the first terminal of the mth selector switch is coupled to the ground voltage via the first multiplexer.

6. The display device as claimed in claim 5, characterized in that: During the first driving cycle, when the m-th selector switch is turned on by the control signal corresponding to the m-th column of light-emitting elements, the first driving signal with the first potential is transmitted to the anode of the first light-emitting element through the m-th selector switch, and the cathode of the first light-emitting element is coupled to the second driving signal with the second potential via the n-th character line, thereby supplying power to the parasitic capacitance of the m-th selector switch and the first light-emitting element; and During the second driving cycle, when the m-th selector switch is turned on by the control signal corresponding to the m-th column of light-emitting elements, the second driving signal with the first potential is transmitted to the anode of the second light-emitting element via the (n+1)-th character line, and the cathode of the second light-emitting element is coupled to the first driving signal with the second potential through the m-th selector switch, thereby supplying power to the second light-emitting element and discharging the parasitic capacitance of the m-th selector switch.

7. The display device as claimed in claim 2, characterized in that: The first multiplexer further includes a first delay circuit, disposed between the first input terminal and the output terminal of the first multiplexer; and The second multiplexer further includes a second delay circuit disposed between the first input terminal and the output terminal of the second multiplexer.

8. The display device as claimed in claim 7, characterized in that: When the first address signal switches from the first potential to the second potential at the first time point, the first delay circuit is used to delay the signal transmission from the first input terminal of the first multiplexer to the output terminal of the first multiplexer, so that the first drive signal completely switches from the second potential to the first potential at the second time point. and At the third time point, when the second address signal switches from the first potential to the second potential, the second delay circuit is used to delay the signal transmission from the first input terminal of the second multiplexer to the output terminal of the second multiplexer, so that the second drive signal completely switches from the second potential to the first potential at the fourth time point.

9. The display device as claimed in claim 1, characterized in that, Multiple of these light-emitting elements contain sub-millimeter light-emitting diodes or micro light-emitting diodes.

10. A driving method for improving ghosting phenomena, characterized in that, Include: During the first driving cycle, the first multiplexer in the display device outputs a first driving signal with a first potential according to the first address signal, and turns on the selection switch to transmit the first driving signal to the anode of the first light-emitting element in the display device, and the second multiplexer in the display device outputs a second driving signal with a second potential to the cathode of the first light-emitting element according to the second address signal. During the second driving cycle following the first driving cycle, the second multiplexer outputs the second driving signal with the first potential to the anode of the second light-emitting element in the display device according to the second address signal, and the first multiplexer outputs the first driving signal with the second potential according to the first address signal, and turns on the selection switch to transmit the first driving signal to the cathode of the second light-emitting element, wherein: The first potential is higher than the second potential; The display device also includes multiple light-emitting elements arranged in an array of M columns and N rows; In the nth row of light-emitting elements in the N rows of light-emitting elements, the cathode of each light-emitting element is commonly coupled to the nth character line; In the (n+1)th row of light-emitting elements in the N rows of light-emitting elements, the anode of each light-emitting element is commonly coupled to the (n+1)th character line; The first light-emitting element is located in the m-th column of the M columns and the n-th row of the N rows of the light-emitting element array; The second light-emitting element is located in the m-th column of the M-th column and the (n+1)-th row of the N-th row of the light-emitting element array; The anode of the first light-emitting element is coupled to the cathode of the second light-emitting element; M and N are integers greater than 1; m is an integer between 1 and M; and n is an odd number between 1 and N-1.

11. The driving method as described in claim 10, characterized in that, Also includes: The first input terminal of the first multiplexer is coupled to the input signal; The second input terminal of the first multiplexer is coupled to the ground voltage; The control terminal of the first multiplexer is coupled to the first address signal; The first multiplexer provides the first drive signal at its output. The first input terminal of the second multiplexer is coupled to the input signal; The second input terminal of the second multiplexer is coupled to the ground voltage; The control terminal of the second multiplexer is coupled to the second address signal; as well as The output of the second multiplexer is selectively coupled to the nth character line and the (n+1)th character line.

12. The driving method as described in claim 11, characterized in that, Also includes: The first terminal of the selection switch is coupled to the output terminal of the first multiplexer; The second terminal of the selector switch is coupled to the anode of the first light-emitting element and the cathode of the second light-emitting element; as well as The control terminal of the selector switch is coupled to the control signal.

13. The driving method of claim 12, further comprising: Provides the first address signal and the second address signal that periodically switch between the first potential and the second potential; The first multiplexer selectively outputs the input signal or the ground voltage based on the first address signal to provide the first drive signal; The second multiplexer selectively outputs the input signal or the ground voltage based on the second address signal to provide the second drive signal; The first potential is higher than the second potential; and The first address signal and the second address signal are out of phase.

14. The driving method of claim 13, further comprising: During the first drive cycle, when the first address signal has the second potential and when the second address signal has the first potential, the first multiplexer outputs the first drive signal with the first potential to the first terminal of the selector switch, and the second multiplexer outputs the second drive signal with the second potential to the nth word line; and During the second drive cycle, when the first address signal has the first potential and when the second address signal has the second potential, the first multiplexer outputs the second drive signal with the second potential to the (n+1)th word line, and the second multiplexer outputs the second drive signal with the first potential to the first terminal of the selection switch.

15. The driving method of claim 14, further comprising: During the first driving cycle, when the selector switch is turned on by the control signal corresponding to the first light-emitting element, the first driving signal with the first potential is transmitted to the anode of the first light-emitting element through the selector switch, and the second driving signal with the second potential is transmitted to the cathode of the first light-emitting element via the nth character line, thereby supplying power to the parasitic capacitance of the selector switch and the first light-emitting element; and During the second driving cycle, when the selection switch is turned on by the switch control signal corresponding to the second light-emitting element, the second driving signal with the first potential is transmitted to the anode of the second light-emitting element via the (n+1)th character line, and the first driving signal with the second potential is transmitted to the cathode of the second light-emitting element via the selection switch, thereby powering the second light-emitting element and discharging the parasitic capacitance of the selection switch.

16. The driving method of claim 10, wherein the plurality of light-emitting elements comprises sub-millimeter light-emitting diodes or micro light-emitting diodes.

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