CN115731855A - Drive device - Google Patents

Abstract

A driving device comprises a scanning circuit and a display circuit. The scan circuit includes a converter. The converter is used for receiving N differential signals to output M scanning signals, wherein the N differential signals comprise a start signal, a plurality of step signals and a plurality of cyclic signals. The display circuit is coupled to the scanning circuit and used for receiving and comparing the scanning signals and the data signals of the M scanning signals to set a brightness starting stage and a brightness closing stage. Wherein a scanning signal of the M scanning signals is related to a starting signal, a plurality of step signals and a plurality of cyclic signals, wherein N is a positive integer greater than 0, and M is a positive integer greater than 0.

Description

Drive device

Technical Field

The present disclosure relates to driving devices, and particularly to a driving device for a micro light emitting diode.

Background

At present, the Light Emitting efficiency of an Organic Light-Emitting Diode (OLED) is proportional to the signal size, however, the optimum Light Emitting efficiency of a Micro Light-Emitting Diode (μ LED) falls within a certain signal size range and is matched with the corresponding lighting time, and if the optimum Light Emitting efficiency of a Micro Light-Emitting Diode panel is pursued, the driving circuit of the Micro Light-Emitting Diode cannot be directly designed by using the driving circuit of the OLED.

Disclosure of Invention

This summary is intended to provide a simplified summary of the disclosure in order to provide a basic understanding to the reader. This summary is not an extensive overview of the disclosure and is intended to neither identify key/critical elements of the embodiments nor delineate the scope of the embodiments.

One aspect of the present disclosure relates to a driving device. The driving device comprises a scanning circuit and a display circuit. The scan circuit includes a converter. The converter is used for receiving the N differential signals to output M scanning signals. The N differential signals include a start signal, a plurality of step signals and a plurality of cyclic signals. The display circuit is coupled to the scanning circuit and used for receiving and comparing the scanning signals and the data signals of the M scanning signals to set a brightness starting stage and a brightness closing stage. The scanning signals in the M scanning signals are related to a starting signal, a plurality of step signals and a plurality of cyclic signals. N is a positive integer greater than 0, and M is a positive integer greater than 0.

Therefore, according to the technical content of the present invention, the driving apparatus according to the embodiment of the present invention can set the signal magnitude range and the lighting time, so as to achieve the effect of optimizing the light emitting efficiency of the micro light emitting diode.

The basic spirit and other objects of the present invention, and the technical means and embodiments adopted by the present invention, will be readily understood by those skilled in the art after referring to the following embodiments.

Drawings

In order to make the aforementioned and other objects, features, and advantages of the invention, as well as others which will become apparent, reference is made to the following description taken in conjunction with the accompanying drawings in which:

fig. 1 is a circuit block diagram illustrating a driving apparatus according to an embodiment of the invention.

Fig. 2 is a circuit diagram illustrating a display circuit of a driving apparatus according to an embodiment of the present invention.

FIG. 3 is a timing diagram illustrating various signals of a driving apparatus according to an embodiment of the present invention.

FIGS. 4A-4D are timing diagrams illustrating various signals of a driving apparatus according to some embodiments of the present invention.

FIGS. 5A-5D are timing diagrams illustrating various signals of a driving apparatus according to some embodiments of the present invention.

Fig. 6 is a circuit block diagram illustrating a driving apparatus according to an embodiment of the invention.

FIG. 7 is a block diagram illustrating various signals of a driving apparatus according to some embodiments of the present invention.

Fig. 8 is a block diagram of a driving apparatus according to an embodiment of the invention.

Fig. 9 is a schematic diagram illustrating an operation of a driving apparatus according to an embodiment of the present invention.

In accordance with conventional practice, the various features and elements of the drawings are not drawn to scale in order to best illustrate the specific features and elements associated with the present invention. Moreover, the same or similar reference numbers are used throughout the different drawings to reference like elements/components.

The reference numbers are as follows:

100. 100A: drive device

110: scanning circuit

111: converter with a voltage detection circuit

1111: micro-controller

113: digital-to-analog converter

115: buffer device

ISP _0 to ISP _ N: differential signal

SW _1 to SW _ M, SW: scanning signal

120: display circuit

121: pulse width modulation circuit

123: pulse amplitude modulation circuit

Vdata: data signal

VDD: power supply signal

EM: luminous signal

D1, D2, D3: light emitting diode

V1: initial signal

Δ V: order signal

loop1 to loop10: cyclical signal

Vdata _1 to Vdata _4: data signal

T1: brightness starting stage

T2: brightness off phase

V2: voltage of

T11, T21, T31, T41: brightness starting stage

T12, T22, T32: brightness off phase

Vth _1 to Vth _4: threshold value

T13, T23, T33, T43: brightness starting stage

T14, T24, T34: brightness off phase

110A: at least one scan circuit

900: panel board

110A: at least one scan circuit

120A, 120B, 120C: at least one display circuit

Sr: signal source integrated circuit

S1: a first data signal

S2: second data signal

S3: third data signal

GOA: grid circuit

Sb1: first source circuit board

Sb2: second source circuit board

FFC: soft board

Tc: panel control panel

100C: drive device

110C: scanning circuit

111C: converter

1111C: micro-controller

113C: digital-to-analog converter

115C: time sequence regenerator

119C: data latch

STB: signal string

LOCK: locking signal

100D: driving circuit

110D: first scanning circuit

110E: second scanning circuit

120E: display circuit

L1～L960：line

S1 to S960: scanning signal

Detailed Description

In order to make the description of the present disclosure more complete and complete, the following illustrative description is given with respect to embodiments and specific examples of the present invention; it is not intended to be the only form in which the embodiments of the invention may be practiced or utilized. The embodiments are intended to cover the features of the various embodiments as well as the method steps and sequences for constructing and operating the embodiments. However, other embodiments may be utilized to achieve the same or equivalent functions and step sequences.

Unless defined otherwise herein, the scientific and technical terms used herein have the same meaning as commonly understood and used by one of ordinary skill in the art to which this invention belongs. Furthermore, as used herein, a singular noun covers a plural of that noun without conflicting context; the use of plural nouns also covers the singular form of such nouns.

Fig. 1 is a circuit block diagram illustrating a driving apparatus according to an embodiment of the invention. Fig. 2 is a circuit diagram illustrating a display circuit of a driving apparatus according to an embodiment of the present invention. Referring to fig. 1 and fig. 2, as shown in the figure, the driving apparatus 100 includes a scan circuit 110 and a display circuit 120, and the scan circuit 110 includes a converter 111. In connection, the display circuit 120 is coupled to the scan circuit 110. For example, the scan circuit 110 can output the scan signal SW _1, and the scan signal SW _1 can be the same as the scan signal SW, so the display circuit 120 can receive the scan signal SW _1, but the invention is not limited thereto.

In order to optimize the light emitting efficiency of the micro-led, the present invention provides a detailed description of the operation of the driving apparatus 100 shown in fig. 1 and 2.

FIG. 3 is a timing diagram illustrating various signals of a driving apparatus according to an embodiment of the present invention. In order to make the above operation of the driving apparatus 100 easy to understand, referring to fig. 1 to 3 together, in an embodiment, the converter 111 is configured to receive N differential signals (e.g., ISP _0 to ISP _ N) to output M scan signals (e.g., SW _1 to SW _ M), and the N differential signals include a start signal (e.g., V1 of fig. 3), a plurality of step signals (e.g., Δ V of fig. 3), and a plurality of cycle signals (e.g., loop1 to loop10 of fig. 3).

Then, the display circuit 120 is used for receiving and comparing the scan signal (e.g., SW _ 1) and the data signal Vdata of M scan signals (e.g., SW _1 to SW _ M) to set a brightness ON phase (e.g., T1 of FIG. 3) and a brightness OFF phase (e.g., T2 of FIG. 3). The scan signal of the M scan signals is related to a start signal (e.g., V1 of FIG. 3), a plurality of step signals (e.g., Δ V of FIG. 3) and a plurality of cyclic signals (e.g., loop 1-loop 10 of FIG. 3), and N is a positive integer greater than 0, and M is a positive integer greater than 0.

For example, referring to fig. 2 and 3, the scan signal SW _1 may be SW, the output of the scan signal may be adjusted by a start signal V1, a plurality of step signals Δ V and a plurality of cyclic signals loop1 to loop10, the start signal V1 may be 2V, the step signal Δ V may be 0.2V, the voltage V2 may be V1+10 × Δ V =2+10 × 0.2=3, and the data signal Vdata may be 2.6V. In an embodiment, the display circuit 120 can be used as the brightness on period T1 by the start signal V1 and the data signal Vdata, that is, the range of the voltage 1-2.6V is the output range of the scan signal SW during the brightness on period T1, and conversely, the display circuit 120 can be used as the brightness off period T2 by the data signal Vdata and the voltage V2, but the invention is not limited thereto.

Referring to fig. 2, in an embodiment, the display circuit 120 is further configured to receive the light emitting signal EM, and the light emitting diode D1 of the display circuit 120 emits light according to the data signal Vdata, the light emitting signal EM and the scan signal SW. For example, the display circuit 120 includes any type of diode, and the light-emitting signal EM is used to control the diode coupled to the light-emitting diode D1 to control whether the data signal Vdata and the scan signal SW flow into the light-emitting diode D1 for emitting light in accordance with the timing sequence, but the invention is not limited thereto.

FIGS. 4A-4D are timing diagrams illustrating various signals of a driving apparatus according to some embodiments of the present invention. Referring to FIG. 2 and FIGS. 4A-4D, in some embodiments, the display circuit 120 receives and writes the data signal (e.g., vdata _ 1-Vdata _ 4) and the scan signal SW simultaneously. For example, the display circuit 120 can simultaneously receive and write the data signal (e.g., vdata _ 1-Vdata _ 4) and the scan signal SW, and the display circuit 120 can compare the relationship between the data signal (e.g., vdata _ 1-Vdata _ 4) and the scan signal SW to set the brightness-on period (e.g., T11, T21, T31, T41) and the brightness-off period (e.g., T12, T22, T32).

In some embodiments, when the scan signal SW is less than or equal to the data signals (e.g., vdata _ 1-Vdata _ 4), there is a brightness-on period (e.g., T11, T21, T31, T41) and the display circuit 120 is turned on to emit light. For example, the light emitting diode D1 of the display circuit 120 may output 96, 128, 192, or 255 brightness gray scales, please refer to fig. 2 and fig. 4A, when the light emitting diode D1 of the display circuit 120 is to output 96 brightness gray scales, the data signal may be the data signal Vdata _1 corresponding to the 96 brightness gray scales, the scan signal may be SW, and when the scan signal SW is the same as the data signal Vdata _1, a stage in which the display circuit 120 receives and writes the scan signal SW into the data signal is the brightness starting stage T11, but the invention is not limited thereto.

In an embodiment, referring to fig. 2 and fig. 4B, when the light emitting diode D1 of the display circuit 120 is to output a 128-luminance gray scale, the data signal may be a data signal Vdata _2 corresponding to the 128-luminance gray scale, the scan signal may be SW, and when the scan signal SW is the same as the data signal Vdata _2, a stage in which the display circuit 120 receives and writes the scan signal SW into the data signal is a luminance starting stage T21, but the invention is not limited thereto.

In an embodiment, referring to fig. 2 and fig. 4C, when the light emitting diode D1 of the display circuit 120 is to output 192 brightness gray scales, the data signal may be a data signal Vdata _3 corresponding to the 192 brightness gray scales, the scan signal may be SW, and when the scan signal SW is the same as the data signal Vdata _3, a stage in which the display circuit 120 receives and writes the scan signal SW into the data signal is a brightness starting stage T31, but the invention is not limited thereto.

In an embodiment, referring to fig. 2 and fig. 4D, when the light emitting diode D1 of the display circuit 120 is to output a 255-luminance gray scale, the data signal may be a data signal Vdata _4 corresponding to the 255-luminance gray scale, and the scan signal may be SW, and when the scan signal SW is the same as the data signal Vdata _4, a stage in which the display circuit 120 receives and writes the scan signal SW into the data signal is a luminance starting stage T41, but the invention is not limited thereto.

In an embodiment, referring to fig. 4A to 4D, the brightness start-up period T41 is greater than the brightness start-up period T31, the brightness start-up period T31 is greater than the brightness start-up period T21, and the brightness start-up period T21 is greater than the brightness start-up period T11, and the display circuit 120 may display the corresponding gray-scale brightness through the brightness start-up periods (e.g., T11 to T41), the data signals (e.g., vdata _1 to Vdata _ 4), and the scan signal SW, but the invention is not limited thereto.

Referring to FIG. 2 and FIGS. 4A-4D, in some embodiments, when the scan signal SW is greater than the data signals (e.g., vdata _ 1-Vdata _ 4), the brightness is turned off (e.g., T12, T22, T32) and the display circuit 120 is turned off. For example, the light emitting diode D1 of the display circuit 120 may output 96, 128, 192 or 255 brightness gray scales, please refer to fig. 2 and fig. 4A, when the light emitting diode D1 of the display circuit 120 is to output 96 brightness gray scales, the data signal may be the data signal Vdata _1 corresponding to the 96 brightness gray scales, the scan signal may be SW, when the display circuit 120 receives and writes the scan signal SW greater than the data signal Vdata _1, which is the brightness off stage T12, at this time, the display circuit 120 is turned off, in other words, the light emitting diode D1 of the display circuit 120 may continuously display 96 brightness gray scales at the brightness on stage T11, but when the brightness off stage T12 is reached, the light emitting diode D1 of the display circuit 120 is turned off, but the invention is not limited thereto.

In an embodiment, referring to fig. 2 and fig. 4B, when the light emitting diode D1 of the display circuit 120 is to output a 128-luminance gray scale, the data signal may be a data signal Vdata _2 corresponding to the 128-luminance gray scale, the scan signal may be SW, and when the display circuit 120 receives and writes the scan signal SW greater than the data signal Vdata _2, the display circuit 120 is turned off, in other words, the light emitting diode D1 of the display circuit 120 may continuously display the 128-luminance gray scale in the luminance on-phase T21, but when the luminance off-phase T22 is reached, the light emitting diode D1 of the display circuit 120 is turned off, but the invention is not limited thereto.

In an embodiment, referring to fig. 2 and fig. 4C, when the light emitting diode D1 of the display circuit 120 is to output 192 brightness gray scales, the data signal may be a data signal Vdata _3 corresponding to the 192 brightness gray scales, the scan signal may be SW, when the display circuit 120 receives and writes the scan signal SW greater than the data signal Vdata _3, the display circuit 120 is turned off, in other words, the light emitting diode D1 of the display circuit 120 may continuously display the 192 brightness gray scales in the brightness on period T31, but when the brightness off period T32 is reached, the light emitting diode D1 of the display circuit 120 is turned off, but the invention is not limited thereto.

In an embodiment, referring to fig. 2 and 4D, when the light emitting diode D1 of the display circuit 120 is to output the 255-luminance gray scale, the data signal may be the data signal Vdata _4 corresponding to the 255-luminance gray scale, and the scan signal may be SW, because the 255-luminance gray scale is full-bright (or called full-white gray scale), when the light emitting diode D1 is to output the 255-luminance gray scale, there is no luminance turn-off stage in the display circuit 120, in other words, the light emitting diode D1 of the display circuit 120 may continuously display the 255-luminance gray scale at the luminance turn-on stage T41, but the invention is not limited thereto.

In an embodiment, referring to fig. 4A to 4D, the brightness turning-off period T12 is greater than the brightness turning-off period T22, and the brightness turning-off period T22 is greater than the brightness turning-off period T32, but the invention is not limited thereto.

FIGS. 5A-5D are timing diagrams illustrating various signals of a driving apparatus according to some embodiments of the present invention. Referring to FIG. 2 and FIGS. 5A-5D, in some embodiments, after the display circuit 120 is used to receive and write the data signal (e.g., vdata _ 1-Vdata _ 4), the display circuit 120 is used to receive and write the scan signal SW. For example, the display circuit 120 may be used to receive and write the data signal (e.g., vdata _ 1-Vdata _ 4) first, then the display circuit 120 may be used to receive and write the scan signal SW, and then the display circuit 120 may compare the relationship between the data signal (e.g., vdata _ 1-Vdata _ 4) and the scan signal SW to set the brightness on period (e.g., T13, T23, T33, T43) and the brightness off period (e.g., T14, T24, T34).

In some embodiments, when the scan signal SW is less than or equal to the threshold (Vth _1 Vth _ 4) of the data signal (e.g., vdata _1 Vdata _ 4), there is a brightness-on period (e.g., T13, T23, T33, T43) and the display circuit 120 is turned on to emit light. For example, the led D1 of the display circuit 120 may output 96, 128, 192 or 255 gray scales, please refer to fig. 2 and fig. 5A, when the led D1 of the display circuit 120 is to output 96 gray scales, the data signal may be the threshold Vth _1 of the data signal Vdata _1 corresponding to the 96 gray scales, the scan signal may be SW, and when the scan signal SW is the same as the threshold Vth _1 of the data signal Vdata _1, the period when the scan signal SW is smaller than or equal to the data signal SW received and written by the display circuit 120 is the brightness starting period T13, but the invention is not limited thereto. In addition, the display circuit 120 includes a capacitor C, and the capacitor C stores a threshold Vth _1 of the data signal Vdata _1, so that the data signal actually written into the light emitting diode D1 of the display circuit 120 may be the threshold Vth _1 of the data signal Vdata _1 corresponding to the 96-luminance gray scale.

In an embodiment, referring to fig. 2 and fig. 5B, when the light emitting diode D1 of the display circuit 120 is to output a 128-luminance gray scale, the data signal may be a threshold Vth _2 of the data signal Vdata _2 corresponding to the 128-luminance gray scale, the scan signal may be SW, and when the scan signal SW is the same as the threshold Vth _2 of the data signal Vdata _2, a stage in which the display circuit 120 receives and writes the scan signal SW into the data signal is the luminance starting stage T23, but the invention is not limited thereto. In addition, the capacitor C of the display circuit 120 stores the threshold Vth _2 of the data signal Vdata _2, so that the data signal actually written into the light emitting diode D1 of the display circuit 120 may be the threshold Vth _2 of the data signal Vdata _2 corresponding to the 128-luminance gray scale.

In an embodiment, referring to fig. 2 and fig. 5C, when the light emitting diode D1 of the display circuit 120 is to output 192 brightness gray scales, the data signal may be a threshold Vth _3 of the data signal Vdata _3 corresponding to the 192 brightness gray scales, the scan signal may be SW, and when the scan signal SW is the same as the threshold Vth _3 of the data signal Vdata _3, a stage in which the display circuit 120 receives and writes the scan signal SW to be less than or equal to the data signal is the brightness starting stage T33, but the invention is not limited thereto. In addition, the capacitor C of the display circuit 120 stores the threshold Vth _3 of the data signal Vdata _3, so that the data signal actually written into the light emitting diode D1 of the display circuit 120 may be the threshold Vth _3 of the data signal Vdata _3 corresponding to the 192-luminance gray scale.

In an embodiment, referring to fig. 2 and fig. 5D, when the light emitting diode D1 of the display circuit 120 is to output a 255-luminance gray scale, the data signal may be a threshold Vth _4 of the data signal Vdata _4 corresponding to the 255-luminance gray scale, the scan signal may be SW, and when the scan signal SW is the same as the threshold Vth _4 of the data signal Vdata _4, a stage in which the display circuit 120 receives and writes the scan signal SW to be less than or equal to the data signal is the luminance starting stage T43, but the invention is not limited thereto. In addition, the capacitor C of the display circuit 120 stores the threshold Vth _4 of the data signal Vdata _4, so that the data signal actually written into the light emitting diode D1 of the display circuit 120 may be the threshold Vth _3 of the data signal Vdata _3 corresponding to the 255-luminance gray scale.

In an embodiment, referring to fig. 5A to 5D, the brightness turn-on period T43 is greater than the brightness turn-on period T33, the brightness turn-on period T33 is greater than the brightness turn-on period T23, and the brightness turn-on period T23 is greater than the brightness turn-on period T13, and the display circuit 120 may display the corresponding gray-scale brightness through the brightness turn-on periods (e.g., T13 to T43), the threshold values (Vth _1 to Vth _ 4) of the data signals (e.g., vdata _1 to Vdata _ 4), and the scan signal SW, but the invention is not limited thereto.

Referring to FIG. 2 and FIGS. 5A-5D, in some embodiments, when the scan signal SW is greater than the threshold (Vth _1 Vth _ 4) of the data signal (e.g., vdata _1 Vdata _ 4), the display circuit 120 is turned off during the brightness off period (e.g., T14, T24, T34). For example, the light emitting diode D1 of the display circuit 120 may output 96, 128, 192 or 255 gray scales, please refer to fig. 2 and fig. 5A, when the light emitting diode D1 of the display circuit 120 is to output 96 gray scales, the data signal may be the threshold Vth _1 of the data signal Vdata _1 corresponding to the 96 gray scales, the scan signal may be SW, when the display circuit 120 receives and writes the scan signal SW greater than the threshold Vth _1 of the data signal Vdata _1, which is the brightness off phase T14, at this time, the display circuit 120 is turned off, in other words, the light emitting diode D1 of the display circuit 120 may continuously display 96 gray scales in the brightness on phase T13, but when the brightness off phase T14 is reached, the light emitting diode D1 of the display circuit 120 is turned off, but the invention is not limited thereto.

In an embodiment, referring to fig. 2 and fig. 5B, when the light emitting diode D1 of the display circuit 120 is to output a 128-luminance gray scale, the data signal may be a threshold Vth _2 of the data signal Vdata _2 corresponding to the 128-luminance gray scale, the scan signal may be SW, when the display circuit 120 receives and writes the scan signal SW greater than the threshold Vth _2 of the data signal Vdata _2, the display circuit 120 is turned off, in other words, the light emitting diode D1 of the display circuit 120 can continuously display the 128-luminance gray scale in the luminance on-phase T23, and the light emitting diode D1 of the display circuit 120 is turned off in the luminance off-phase T24, but the invention is not limited thereto.

In an embodiment, referring to fig. 2 and fig. 5C, when the light emitting diode D1 of the display circuit 120 is to output 192 brightness gray scales, the data signal may be the threshold Vth _3 of the data signal Vdata _3 corresponding to the 192 brightness gray scales, the scan signal may be SW, when the display circuit 120 receives and writes the scan signal SW greater than the threshold Vth _3 of the data signal Vdata _3, which is the brightness off phase T34, the display circuit 120 is turned off at this time, in other words, the light emitting diode D1 of the display circuit 120 can continuously display the 192 brightness gray scales in the brightness on phase T33, but the light emitting diode D1 of the display circuit 120 is turned off when the brightness off phase T34 is reached, but the invention is not limited thereto.

In an embodiment, referring to fig. 2 and fig. 5D, when the light emitting diode D1 of the display circuit 120 is to output the 255-luminance gray scale, the data signal may be the threshold Vth _4 of the data signal Vdata _4 corresponding to the 255-luminance gray scale, and the scan signal may be SW, because the 255-luminance gray scale is full-bright (or called full-white gray scale), when the light emitting diode D1 is to output the 255-luminance gray scale, the display circuit 120 does not have a luminance turn-off stage, in other words, the light emitting diode D1 of the display circuit 120 may continuously display the 255-luminance gray scale at the luminance turn-on stage T43, but the invention is not limited thereto.

In an embodiment, referring to fig. 5A to 5D, the brightness turning-off period T14 is greater than the brightness turning-off period T24, and the brightness turning-off period T24 is greater than the brightness turning-off period T34, but the invention is not limited thereto.

In addition, in contrast, the Light Emitting characteristics of an Organic Light-Emitting Diode (OLED) element are such that the larger the current is supplied, the larger the luminance is obtained, and the Light Emitting efficiency is proportional to the change in the current, so that the change in luminance can be controlled by controlling the writing voltage using a simple circuit. However, the Micro Light Emitting Diode (μ LED) device is characterized by obtaining a relatively better efficiency when operating at a certain voltage value, but when the brightness needs to be modulated, the voltage cannot be controlled to change to provide different current modes, so that the Light Emitting efficiency of the μ LED becomes particularly poor, and thus the driving device 100 of the present invention controls the Display circuit 120 to write a signal (e.g., the data signal Vdata) and then compares the signal with the scanning signal SW written by the scanning circuit 110 to turn on the panel (e.g., the scanning circuit 110) for a period of time (e.g., the brightness turning-on period T1).

In one embodiment, referring to fig. 2, the display circuit 120 includes a pulse width modulation circuit 121 (e.g., PWM circuit 121) and a pulse amplitude modulation circuit 123 (e.g., PAM circuit 123), the pulse width modulation circuit 121 (e.g., PWM circuit) is configured to output a pulse width modulation signal, and the pulse amplitude modulation circuit 123 (e.g., PAM circuit 123) is configured to output a pulse height modulation signal. For example, after writing data (e.g., data signal Vdata) into the display circuit 120 through the pulse width modulation circuit 121 (e.g., PWM circuit 121), the pulse width modulation signal is written into the display circuit 120 and the display circuit 120 emits light, and data (e.g., data signal Vdata) needs to be written into the next line during the light emitting time, the display circuit 120 emits light again, and the time for the scan signal SW in each line light emitting length adjustable pulse width modulation circuit 121 (e.g., PWM circuit 121) can increase or decrease the overall brightness, but the invention is not limited thereto.

Fig. 6 is a block diagram of a driving apparatus according to an embodiment of the invention. As shown, the panel 900 includes a driving device 100A (not shown), i.e., at least one scan circuit 110A and at least one display circuit (e.g., 120A, 120B, 120C), a signal source integrated circuit Sr, a gate circuit GOA, a first source circuit board Sb1, a second source circuit board Sb2, a flexible board FFC, and a panel control board Tc.

In one embodiment, at least one scan circuit 110A is used for outputting a first scan signal SW _1, a second scan signal SW _2 and a third scan signal SW _3. The signal source integrated circuit Sr is used to output a first data signal S1, a second data signal S2, and a third data signal S3. The at least one display circuit 120A is configured to receive a first scan signal SW _1 and a first data signal S1. The at least one display circuit 120B is configured to receive the second scan signal SW _2 and the second data signal S2. The at least one display circuit 120C is configured to receive the first scan signal SW _3 and the third data signal S3. In addition, the operation of the driving apparatus 100A (i.e., the at least one scan circuit 110A and the at least one display circuit (e.g., 120A, 120B, 120C)) is similar to that of the driving apparatus 100, and therefore, for the sake of reducing the content of the description, further description is omitted here.

FIG. 7 is a block diagram illustrating various signals of a driving apparatus according to some embodiments of the present invention. Referring to fig. 7, in an embodiment, the N differential signals (not shown, for example, ISP _0 to ISP _ N) include a first differential signal ISP _0, a second differential signal ISP _1 and a third differential signal ISP _2. The first differential signal ISP _0 includes n start signals, the second differential signal ISP _1 includes n step signals, and the third differential signal ISP _2 includes n cyclic signals, where n is an integer greater than or equal to 0. For example, the n start signals may be Data init1[0] to Data init1[ n ], the n step signals may be Data step1[0] to Data step1[ n ], and the n cycle signals may be Data loop1[0] to Data loop1[ n ], but the invention is not limited thereto.

Referring to fig. 1, in one embodiment, the converter 111 includes a microcontroller 1111. The scan circuit 110 further includes M digital-to-analog converters 113 and M buffers 115, and the microcontroller 1111, the M digital-to-analog converters 113 and the M buffers 115 are configured to receive content data of the N differential signals (e.g., ISP _0 to ISP _ N) to output M scan signals (e.g., SW _1 to SW _ M).

Fig. 8 is a block diagram of a driving apparatus according to an embodiment of the invention. Referring to fig. 8, in an embodiment, the converter 111 further includes a differential signal decoder 113C, a timing regenerator 115C, and a data latch 119C. The differential signal decoder 113C is used for receiving N differential signals (e.g., ISP _0 to ISP _ N), the signal string STB and the LOCK signal LOCK. The differential signal includes a complex signal (e.g., signal BK, BAC, POL +, RGB data, EOL, setting, or Setting data).

Fig. 9 is a schematic diagram illustrating an operation of a driving apparatus according to an embodiment of the present invention. Referring to fig. 1, fig. 2 and fig. 9, in an embodiment, the driving circuit 100D includes a first scanning circuit 110D, a second scanning circuit 110E and a display circuit 120E. The first scanning circuit 110D can output 960 scanning signals (for example, scanning signal strings S1 to S360, S361 to S720, and S721 to S960) in divided manner, and the display circuit 120E can output scanning signals in three divided manners (for example, display regions L1 to L360, L361 to L720, and L721 to L960). In addition, 960 scan signals (e.g., the scan signal strings S1 to S360, S361 to S720 and S721 to S960) outputted by the first scan circuit 110D can sequentially illuminate the display regions L1 to L360, L361 to L720 and L721 to L960, and similarly, the operation of the second scan circuit 110E is similar to that of the first scan circuit 110D, and the first scan circuit 110D and the second scan circuit 110E are driven simultaneously, which is not repeated herein for reducing the content of the description.

The operation method is to output a plurality of scan signals to a panel (e.g., the display circuit 120E) through a plurality of scan circuits (e.g., the first scan circuit 110D and the second scan circuit 110E), and the resolution of the panel 120E can be 1440 × 960. The coupling is such that each line (e.g., the line of the output signal S1) is connected to about 3 lines (e.g., the output signals L1, L361, L721), and the lighting of the 3 lines is controlled simultaneously, wherein 360 pixel structures are operated, and each 360CH portion has one signal connected together for outputting, so as to perform the effect of increasing the signal stability in the serial connection.

As can be seen from the above-described embodiments of the present invention, the following advantages can be obtained by applying the present invention. The driving device of the embodiment of the invention can set the signal size range and the lighting time so as to achieve the effect of optimizing the light emitting efficiency of the micro light emitting diode.

Although the foregoing embodiments have been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims (10)

1. A drive device, comprising:

a scanning circuit, comprising:

a converter for receiving N differential signals to output M scanning signals, wherein the N differential signals comprise a start signal, a plurality of step signals and a plurality of cycle signals; and

a display circuit, coupled to the scan circuit, for receiving and comparing a scan signal and a data signal of the M scan signals to set a brightness on stage and a brightness off stage;

wherein one of the M scanning signals is related to the start signal, the plurality of step signals and the plurality of cyclic signals, wherein N is a positive integer greater than 0, and M is a positive integer greater than 0.

2. The driving apparatus as claimed in claim 1, wherein the display circuit is further configured to receive a light emitting signal, and a light emitting diode of the display circuit emits light according to the data signal, the light emitting signal and the scan signal.

3. The driving device as claimed in claim 1, wherein the display circuit receives and writes the data signal and the scan signal simultaneously.

4. The driving apparatus according to claim 3, wherein when the scan signal is less than or equal to the data signal, the brightness start stage is performed and the display circuit is turned on to emit light.

5. The driving apparatus according to claim 4, wherein when the scan signal is greater than the data signal, the brightness off period is active and the display circuit is turned off.

6. The driving device as claimed in claim 2, wherein the display circuit is used to receive and write the data signal first, and then the display circuit is used to receive and write the scan signal.

7. The driving device according to claim 6, wherein when the scan signal is less than or equal to a threshold of the data signal, the brightness start stage is performed and the display circuit is turned on to emit light.

8. The driving apparatus according to claim 7, wherein when the scan signal is greater than the threshold of the data signal, the brightness off period is active and the display circuit is turned off.

9. The driving apparatus as claimed in claim 2, wherein the converter comprises a microcontroller, wherein the scan circuit further comprises M digital-to-analog converters and M buffers, wherein the microcontroller, the M digital-to-analog converters and the M buffers are configured to receive N differential signals to output M scan signals.

10. The driving apparatus according to claim 2, wherein the N differential signals comprise a first differential signal, a second differential signal and a third differential signal, wherein the first differential signal comprises N start signals, the second differential signal comprises N step signals, and the third differential signal comprises N cyclic signals, wherein N is an integer greater than or equal to 0.

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