Driving system for scanning display

Abstract

A driving system for a scanning display includes a first scanning driving device. The first scanning driving device includes a configuration register, which configures a default counting parameter and a plurality of default scanning sequence values ​​according to a sequence data input signal and a frequency signal; a counter, which generates a counting value according to an enable signal, the frequency signal and the default counting parameter; a plurality of comparators, which each generates a comparison result that changes with the corresponding default scanning sequence value according to the counting value and the corresponding default scanning sequence value; and a driver, which generates a plurality of scanning driving signals that change with the comparison results according to the frequency signal and the comparison result, so as to drive the scanning display, so that the row scanning sequence of the scanning display changes in response to the scanning driving signal. In this way, the low-gray image of the display screen of the scanning display can be optimized, and the image flickering of the display screen is not easily perceived, which can improve the visual quality.

Description

Technical Field

[0001] The invention relates to a system, in particular to a driving system of a scanning display. Background Art

[0002] The existing driving system for driving a scanning display to emit light for image display comprises a control device, a scanning driving device, and a data driving device. The scanning driving device and the data driving device are respectively controlled by the control device to generate a plurality of scanning driving signals and a plurality of data driving signals. The scanning driving device outputs the scanning driving signals to a plurality of scanning lines of the scanning display, and the data driving device outputs the data driving signals to a plurality of data lines of the scanning display, so as to drive the scanning display to emit light.

[0003] In the prior art, the scanning drive device drives the scanning display to display images in a row-by-row manner (each row is defined as a scanning line and a plurality of light-emitting diodes electrically connected thereto). However, the row-by-row manner of emitting light alone easily causes the image displayed by the scanning display to visually appear as a scanning block consisting of a low-gray area and a high-gray area repeatedly presented in sequence, causing the user to easily feel the image flickering on the display screen when viewing a display screen of the scanning display, thereby reducing the visual quality.

[0004] In addition, see Figure 1 , when the scanning driving device (ie, Figure 1 When the number 100 is implemented using a decoding circuit, multiple input terminals of the decoding circuit are electrically connected to the control device (ie, Figure 1 101), for example, if the decoding circuit is a three-to-eight decoder, the three input terminals of the decoding circuit (ie, Figure 1 The control device is electrically connected to the drive system through three wires (numbered I1, I2, and I3). Therefore, when the scanning display has more scanning lines, the drive system needs more scanning drive devices that are electrically connected to the control device, so that the drive system can output multiple scanning drive signals consistent with the number of scanning lines of the scanning display. At the same time, each wire between each scanning drive device and the control device needs to be as long as possible to ensure that the delay between the scanning drive devices is as small as possible. In this way, the wiring of the drive system on a printed circuit board will become more and more compact, resulting in more complex and difficult wiring on the printed circuit board, resulting in an increase in the required manufacturing cost. Summary of the invention

[0005] An object of the present invention is to provide a driving system for a scanning display that can overcome at least one disadvantage of the background art.

[0006] The driving system of the scanning display of the present invention comprises a first scanning driving device, which comprises a configuration register, a counter, a plurality of comparators, and a driver.

[0007] The configuration register is used to receive a serial data input signal and a frequency signal, and configure a default counting parameter and a plurality of default scanning sequence values ​​respectively related to adjusting the corresponding row scanning sequence according to the serial data input signal and the frequency signal, and each default scanning sequence value is a variable value.

[0008] The counter is used for receiving the frequency signal and an enable signal, and is electrically connected to the configuration register to receive the default count parameter, and accumulates the frequency of the frequency signal according to the enable signal and the default count parameter to generate a count value.

[0009] The comparator is electrically connected to the configuration register to respectively receive the default scan sequence value, and is electrically connected to the counter to receive the count value. Each comparator compares the count value with the corresponding received default scan sequence value to generate a comparison result, and the comparison result changes with the change of the corresponding received default scan sequence value.

[0010] The driver is used to receive the frequency signal and the enable signal, and is electrically connected to the comparator to receive multiple comparison results. The driver is controlled by the enable signal to operate in one of a normal mode and a shutdown mode, and generates multiple scan drive signals based on at least the frequency signal and the comparison results and outputs them to the scanning display to drive the scanning display to emit light. When the driver operates in the normal mode, the scan drive signals generated change with the changes in the comparison results, so that the scanning sequence of the scanning display changes in response to the scan drive signals.

[0011] In the driving system of the present invention, when the default scanning sequence value is a discontinuous value, the scanning driving signal generated when the driver operates in the normal mode drives the scanning display to skip rows and emit light.

[0012] The drive system of the present invention further comprises:

[0013] The control device is electrically connected to the configuration register, the counter, and the driver, generates the sequence data input signal, the frequency signal, and the enable signal, and outputs the sequence data input signal and the frequency signal to the configuration register, and outputs the frequency signal and the enable signal to the counter and the driver.

[0014] In the driving system of the present invention, the first scanning driving device has a serial data output terminal, the serial data input signal has multiple bits, and the configuration register also shifts the bits of the serial data input signal according to the frequency signal to generate a serial data output signal, and outputs the serial data output signal at the serial data output terminal.

[0015] The drive system of the present invention further comprises:

[0016] A plurality of second scanning drive devices, each of which has a sequence data input terminal and a sequence data output terminal, wherein the sequence data input terminal of a first second scanning drive device among the second scanning drive devices is electrically connected to the sequence data output terminal of the first scanning drive device to receive the sequence data output signal, and among two adjacent second scanning drive devices of the second scanning drive devices, the sequence data output terminal of the previous second scanning drive device is electrically connected to the sequence data input terminal of the next second scanning drive device, so that the second scanning drive devices are connected in series and transmit the sequence data output signal in sequence, and each second scanning drive device is also electrically connected to the control device to receive the frequency signal and the enable signal.

[0017] In the driving system of the present invention, the scanning driving signal generated by the driver when operating in the shutdown mode does not change with the change of the comparison result, and the driver provides a discharge path for the scanning display.

[0018] The drive system of the present invention comprises

[0019] an image afterimage elimination control circuit, for receiving the frequency signal and the enable signal, and electrically connected to the comparator to receive the comparison result, the image afterimage elimination control circuit is controlled by the enable signal to operate in one of the normal mode and the shutdown mode, and generates a plurality of control signals according to the frequency signal and the comparison result, the control signals generated when the image afterimage elimination control circuit operates in the normal mode change with the change of the comparison result, and the control signals generated when the image afterimage elimination control circuit operates in the shutdown mode do not change with the change of the comparison result, and

[0020] A plurality of driving circuits are electrically connected to the afterimage elimination control circuit to receive the control signals respectively, and each driving circuit generates at least one corresponding one of the scanning driving signals according to the corresponding received control signal.

[0021] The drive system of the present invention,

[0022] The configuration register also configures a default adjustment signal for adjusting the size of the afterimage of the scanning display according to the sequence data input signal and the frequency signal, and

[0023] Each driving circuit also receives a default blanking voltage and is electrically connected to the configuration register to receive the default adjustment signal, and generates the corresponding one of the scanning drive signals based on the default blanking voltage, the default adjustment signal and the corresponding received control signal, so that the size of the afterimage of the scanning display changes with the change of the default adjustment signal.

[0024] The driving system of the present invention, each driving circuit comprises

[0025] A voltage generating unit is used to receive the default blanking voltage and is electrically connected to the configuration register to receive the default adjustment signal and adjust the default blanking voltage according to the default adjustment signal to generate an output voltage.

[0026] a first transistor having a first end for receiving a DC bias voltage, a second end for outputting the corresponding one of the scan drive signals, and a control end electrically connected to the afterimage elimination control circuit to receive a corresponding one of the control signals, and

[0027] The second transistor has a first end electrically connected to the second end of the first transistor, a second end grounded, and a control end electrically connected to the voltage generating unit to receive the output voltage.

[0028] The beneficial effect of the present invention is that by configuring the default scanning sequence value using the configuration register, the row scanning sequence of the scanning display can be defined by oneself, so that the scanning display can emit light in a row-skipping manner. In this way, the low-gray image of the display screen of the scanning display can be optimized, so that the user is not likely to feel the flickering of the display screen when watching the display screen, thereby improving the visual quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings:

[0030] Figure 1 is a block diagram illustrating a driving system of a conventional scanning display;

[0031] Figure 2 is a block diagram illustrating an embodiment of a driving system for a scanning display of the present invention;

[0032] Figure 3 is a circuit block diagram illustrating a driving circuit of the embodiment;

[0033] Figure 4 is a block diagram illustrating another implementation of the embodiment; and

[0034] Figure 5 is a timing diagram illustrating an enable signal, a clock signal, a count value, and a plurality of scan driving signals of another implementation of the embodiment. DETAILED DESCRIPTION

[0035] See also Figure 2 , an embodiment of the driving system of the scanning display 10 of the present invention comprises a first scanning driving device 1, a control device 2 and other necessary elements (such as a data driving device, not shown in the figure). It should be noted that, in the present embodiment, the scanning display 10 comprises a plurality of scanning lines (not shown in the figure) and a plurality of data lines (not shown in the figure), and the scanning lines and the data lines are arranged in a matrix. In the scanning display 10, each scanning line and its corresponding electrically connected plurality of light emitting diodes (not shown in the figure) are defined as a row of corresponding pixels, and each data line and its corresponding electrically connected plurality of light emitting diodes are defined as a column of corresponding pixels and arranged. The first scanning driving device 1 is used to generate a plurality of scanning driving signals Out1~Outn, and output the scanning driving signals Out1~Outn to the corresponding scanning lines in the scanning display 10 respectively, and the data driving device is used to generate a plurality of data driving signals, and output the data driving signals to the corresponding data lines in the scanning display 10 respectively, so as to cooperate and drive the scanning display to emit light.

[0036] The control device 2 is used to generate a serial data input signal SDi, a clock signal CLK, and an enable signal En.

[0037] The first scan driving device 1 is electrically connected to the control device 2 to receive the serial data input signal SDi, the clock signal CLK and the enable signal En, and includes a configuration register 11 , a counter 12 , a plurality of comparators 13 , and a driver 14 .

[0038] The configuration register 11 is electrically connected to the control device 2 to receive the serial data input signal SDi and the frequency signal CLK, and configures a default counting parameter ST according to the serial data input signal SDi and the frequency signal CLK, configures a plurality of default scanning sequence values ​​SC1-SCn respectively related to the corresponding row scanning sequence for adjusting the corresponding row scanning sequence, and configures a default adjustment signal SD for adjusting the size of the residual image of the scanning display 10. It should be noted that each default scanning sequence value SC1-SCn is a variable value. In the present embodiment, the default scanning sequence values ​​SC1-SCn are discontinuous values, so that the first scanning drive device 1 drives the scanning display 10 to skip rows and emit light, but is not limited to this. In other embodiments, the default scanning sequence values ​​SC1-SCn may be continuous values, so that the first scanning drive device 1 drives the scanning display 10 to emit light row by row. The afterimage of the scanning display 10 refers to the phenomenon that during the normal lighting process of the scanning display 10, a display screen (not shown) of the scanning display 10 may have an afterimage due to the parasitic capacitance of the anode of the light-emitting diode in the scanning display 10 instantly generating a discharge path when scanning is switched (that is, the parasitic capacitance relationship on the metal wire layout of the circuit causes the light-emitting diode that should not emit light adjacent to the normally emitting light-emitting diode to appear slightly bright).

[0039] The counter 12 is electrically connected to the control device 2 to receive the frequency signal CLK and the enable signal En, and is electrically connected to the configuration register 11 to receive the default count parameter ST. The counter 12 accumulates the frequency of the frequency signal CLK according to the enable signal En and the default count parameter ST to generate a count value CNT. For example, the enable signal En is used to enable the counter 12 to start counting. The default count parameter ST is used to indicate that the counter 12 ends counting when the count value CNT accumulates to a preset cumulative value. The preset cumulative value, for example, is less than or equal to the total number of scan lines of the scanning display 10.

[0040] The comparator 13 is electrically connected to the configuration register 11 to receive the default scan sequence values ​​SC1-SCn respectively, and is electrically connected to the counter 12 to receive the count value CNT. Each comparator 13 compares the count value CNT with a corresponding one of the default scan sequence values ​​SC1-SCn to generate a corresponding one of a plurality of comparison results C1-Cn. The corresponding one of the comparison results C1-Cn changes with the change of the corresponding one of the default scan sequence values ​​SC1-SCn. For example, the first comparator 13 compares the count value CNT with the default scan sequence value SC1 to generate the comparison result C1. When the count value CNT is the same as the default scan sequence value SC1, the comparison result C1 has a high logic level "1". When the count value CNT is different from the default scan sequence value SC1, the comparison result C1 has a low logic level "0". Similarly, the operation of the remaining comparators 13 is as described above, and so on.

[0041] The driver 14 is used to receive a default blanking voltage Vr, and is electrically connected to the scanning display 10, electrically connected to the control device 2 to receive the clock signal CLK and the enable signal En, electrically connected to the comparator 13 to receive the comparison results C1-Cn, and electrically connected to the configuration register 11 to receive the default adjustment signal SD. The driver 14 is controlled by the enable signal En to operate in one of a normal mode and a shutdown mode, and generates the scanning drive signals Out1-Outn according to the clock signal CLK, the comparison results C1-Cn, the default blanking voltage Vr, and the default adjustment signal SD in the normal mode or the shutdown mode, and outputs the scanning drive signals Out1-Outn to the scanning display 10. The scan drive signals Out1 to Outn generated by the driver 14 when operating in the normal mode change with the changes of the comparison results C1 to Cn and the default adjustment signal SD, so that the row scanning sequence of the scanning display 10 changes in response to the scan drive signals Out1 to Outn to drive the scanning display 10 to skip rows and emit light. The scan drive signals Out1 to Outn generated by the driver 14 when operating in the shutdown mode only change with the changes of the default adjustment signal SD, and do not change with the changes of the comparison results C1 to Cn, and the driver 14 provides a discharge path for the scanning display 10 to eliminate the afterimage problem of the scanning display 10. In another embodiment, the driver 14 can generate the scan drive signals Out1 to Outn only according to the clock signal CLK and the comparison results C1 to Cn, which is well known to those skilled in the art and will not be described in detail for the sake of brevity.

[0042] In this embodiment, the driver 14 includes an afterimage elimination control circuit 141 and a plurality of driving circuits 142 .

[0043] The afterimage elimination control circuit 141 is electrically connected to the control device 2 to receive the clock signal CLK and the enable signal En, and is electrically connected to the comparator 13 to receive the comparison results C1-Cn. The afterimage elimination control circuit 141 is controlled by the enable signal En to operate in one of the normal mode and the shutdown mode, and generates a plurality of control signals V1-Vn according to the clock signal CLK and the comparison results C1-Cn. In the present embodiment, when the potential of the enable signal En is the low logic level, the afterimage elimination control circuit 141 can be correspondingly switched to the normal mode, and the control signals V1-Vn generated by it change with the change of the comparison results C1-Cn respectively; and when the potential of the enable signal En is the high logic level, the afterimage elimination control circuit 141 can be correspondingly switched to the shutdown mode, and the control signals V1-Vn generated by it do not change with the change of the comparison results C1-Cn respectively.

[0044] Each driving circuit 142 receives the default image erasing voltage Vr, is electrically connected to the afterimage elimination control circuit 141 to receive a corresponding one of the control signals V1-Vn, and is electrically connected to the configuration register 11 to receive the default adjustment signal SD. Each driving circuit 142 generates a corresponding one of the scanning driving signals Out1-Outn according to the default image erasing voltage Vr, the default adjustment signal SD and the corresponding one of the control signals V1-Vn, and outputs the generated one to the scanning display 10.

[0045] Further reading Figure 3 In this embodiment, each driving circuit 142 includes a voltage generating unit 1421 , and first and second transistors 1422 , 1423 .

[0046] The voltage generating unit 1421 is used to receive the default image elimination voltage Vr, and is electrically connected to the configuration register 11 to receive the default adjustment signal SD, and adjusts the default image elimination voltage Vr according to the default adjustment signal SD to generate an output voltage Vo. The first transistor 1422 has a first end for receiving a DC bias voltage VDD, a second end for outputting a corresponding one of the scan drive signals Out1~Outn, and a control end electrically connected to the afterimage elimination control circuit 141 to receive a corresponding one of the control signals V1~Vn. The second transistor 1423 has a first end electrically connected to the second end of the first transistor 1422, a second end grounded, and a control end electrically connected to the voltage generating unit 1421 to receive the output voltage Vo. It should be noted that in this embodiment, the light-emitting diodes in the scanning display 10 are configured in a common anode structure. Therefore, the first and second transistors 1422 and 1423 are each a P-type metal oxide semi-conductor field effect transistor, wherein the source, drain and gate are respectively the first end, the second end and the control end of each of the first and second transistors 1422 and 1423, but are not limited to this.

[0047] In detail, the operation of the first comparator 13 and the first driving circuit 142 is described below. During operation, when the residual image elimination control circuit 141 operates in the normal mode, and the comparison result C1 output by the first comparator 13 has the high logic level "1", in the first driving circuit 142, the first transistor 1422 is controlled by the control signal V1 to be turned on, and the second transistor 1423 is controlled by the output voltage Vo to be turned off, so that the scanning driving signal Out1 generated by the first driving circuit 142 has the high logic level "1", so that the light-emitting diode electrically connected to the corresponding scanning line in the scanning display 10 emits light. When the afterimage elimination control circuit 141 operates in the normal mode, and the comparison result C1 output by the first comparator 13 has the low logic level "0", in the first driving circuit 142, the first transistor 1422 is controlled by the control signal V1 to be turned off, and the second transistor 1423 is controlled by the output voltage Vo to be turned on, so that the scanning driving signal Out1 generated by the first driving circuit 142 has the low logic level "0", so that the light-emitting diode electrically connected to the corresponding scanning line in the scanning display 10 does not emit light. Similarly, the operation of the remaining comparators 13 and the driving circuit 142 is as described above, and so on.

[0048] In this embodiment, when the afterimage elimination control circuit 141 operates in the normal mode, since the control signals V1~Vn change respectively with the changes of the comparison results C1~Cn, and each of the scan drive signals Out1~Outn generated by the drive circuit 142 changes with the changes of a corresponding one of the control signals V1~Vn and the default adjustment signal SD, and since the default scan sequence values ​​SC1~SCn are discontinuous values, the comparison results C1~Cn do not have the high logic level in sequence, and the scan drive signals Out1~Outn also do not have the high logic level in sequence, so that a light-emitting diode array in the scanning display 10 does not emit light sequentially row by row, but emits light in a row-skipping manner.

[0049] In addition, during operation, when the afterimage elimination control circuit 141 operates in the shutdown mode, the control signals V1-Vn generated by the afterimage elimination control circuit 141 will not change with the changes of the comparison results C1-Cn, and each of the scanning driving signals Out1-Outn has the low logic level, so that the light emitting diodes in the scanning display 10 can be discharged through the corresponding driving circuit 142 to eliminate the afterimage problem occurring on the display screen of the scanning display 10. The operation of the first comparator 13 and the first driving circuit 142 is described below. When the afterimage elimination control circuit 141 operates in the shutdown mode, in the first driving circuit 142, the first transistor 1422 is controlled by the control signal V1 to be turned off, and the second transistor 1423 is controlled by the output voltage Vo to be turned on, so that the scanning driving signal Out1 generated by the first driving circuit 142 has the low logic level "0". At this time, the residual charge of the scanning line electrically connected to the first driving circuit 142 in the scanning display 10 due to the parasitic capacitance can be discharged through a discharge path provided by the second transistor 1423 to eliminate the afterimage problem of the scanning display 10. It should be noted that the output voltage Vo can be changed by adjusting the default adjustment signal SD, thereby adjusting the conduction condition of the second transistor 1423 when it is turned on, so that the discharge path provided by the second transistor 1423 has the effect of adjusting the afterimage elimination effect. In short, the size of the afterimage of the scanning display 10 can change with the change of the default adjustment signal SD, thereby achieving the effect that the afterimage of the scanning display 10 is adjustable. Similarly, the operation of the remaining comparators 13 and the driving circuit 142 is the same as described above, and so on.

[0050] See also Figure 4, which is another embodiment of the driving system of the scanning display 10 of the present invention. When the first scanning driving device 1 can output eight scanning driving signals Out1 to Out8 at most (i.e., n=8), and the scanning display 10 has 24 scanning lines, the driving system further needs to include two second scanning driving devices 3 to drive the scanning display 10 with 24 scanning lines, but is not limited thereto.

[0051] Each of the first scan driving device 1 and the second scan driving device 3 has a sequence data input terminal SDI, a sequence data output terminal SDO, eight signal output terminals OUT1 to OUT8, and other necessary input terminals. The sequence data input terminal SDI of the first scan driving device 1 is electrically connected to the control device 2 to receive the sequence data input signal SDi. The sequence data input terminal SDI of the first second scan driving device 3 (i.e., the second scan driving device 3 adjacent to the first scan driving device 1) of the second scan driving device 3 is electrically connected to the sequence data output terminal SDO of the first scan driving device 1. Among the two adjacent second scan driving devices 3 of the second scan driving device 3, the sequence data output terminal SDO of the previous second scan driving device 3 (e.g., the first second scan driving device 3) is electrically connected to the sequence data input terminal SDI of the next second scan driving device 3, and the sequence data output terminal SDO of the last second scan driving device 3 is an empty pin. Each second scan driving device 3 is also electrically connected to the control device 2 to receive the clock signal CLK and the enable signal En. It should be noted that the detailed circuit structure and operation of each second scan driving device 3 are similar to those of the first scan driving device 1 , and are not described in detail herein.

[0052] In this embodiment, the sequence data input signal SDi has a plurality of bits. Figure 2) shifts the bit of the sequence data input signal SDi according to the frequency signal CLK to generate a sequence data output signal SDo, and outputs the sequence data output signal SDo to the sequence data input terminal SDI of the first second scan driving device 3 through its own sequence data output terminal SDO. Similarly, the configuration register (not shown) of the first second scan driving device 3 shifts the sequence data output signal SDo received by its sequence data input terminal SDI according to the frequency signal CLK, and outputs it to the sequence data input terminal SDI of the second second scan driving device 3 through its own sequence data output terminal SDO. In this way, the configuration register 11 is used to replace the existing technology of using a decoding circuit to implement the scan driving device, so that the first and second scan driving devices 1 and 3 can be connected in series and transmit the sequence data output signal SDo in sequence, thereby simplifying the wiring layout design between the first and second scan driving devices 1 and 3 and the control device 2. In this way, the wiring of the driving system on a printed circuit board is simpler and easier to configure, thereby reducing the required manufacturing cost.

[0053] Figure 5 is a timing diagram illustrating the enable signal En, the clock signal CLK, the count value CNT, the eight scan driving signals Out1 - Out8 of the first scan driving device 1 , and the eight scan driving signals Out1 ′ - Out8 ′ of the first second scan driving device 3 of the other implementation. Figure 5Take the example that the first scan driving device 1 drives the 1st to 8th scanning lines of the scanning display 10, and the first second scan driving device 3 drives the 9th to 16th scanning lines of the scanning display 10, but the present invention is not limited thereto. In this example, in the first scan driving device 1, the default scan order values ​​SC1 to SC8 are respectively "SC1=3, SC2=2, SC3=1, SC4=4, SC5=5, SC6=7, SC7=6, SC8=9", and in the first second scan driving device 3, the default scan order values ​​SC1' to SC8' are respectively "SC1'=8, SC2'=11, SC3'=12, SC4'=10, SC5'=13, SC6'=14, SC7'=15, SC8'=16". The default counting parameter ST indicates that the counter 12 stops counting when the count value CNT reaches twelve, but the present invention is not limited thereto. In this embodiment, the afterimage elimination control circuit 141 is controlled by the enable signal En to operate in the normal mode and the counter 12 is enabled by the enable signal En to start counting. When the count value CNT is equal to one, the comparison result C3 of the third comparator 13 corresponding to the default scan sequence value SC3 has the high logic level, so that the scan drive signal Out3 has the high logic level. When the count value CNT is equal to two, the comparison result C2 of the second comparator 13 corresponding to the default scan sequence value SC2 has the high logic level, so that the scan drive signal Out2 has the high logic level. When the count value CNT is equal to twelve, the comparison result C3 of the third comparator 13 corresponding to the default scan sequence value SC3' has the high logic level, so that the scan drive signal Out3' has the high logic level, and the rest are similar. In this way, the order in which the LED array in the scanning display 10 emits light is "the LED corresponding to the 3rd row of scan lines emits light, the LED corresponding to the 2nd row of scan lines emits light, the LED corresponding to the 1st row of scan lines emits light, the LED corresponding to the 4th row of scan lines emits light, the LED corresponding to the 5th row of scan lines emits light, the LED corresponding to the 7th row of scan lines emits light, the LED corresponding to the 6th row of scan lines emits light, the LED corresponding to the 9th row of scan lines emits light, the LED corresponding to the 8th row of scan lines emits light, the LED corresponding to the 12th row of scan lines emits light, the LED corresponding to the 10th row of scan lines emits light, and the LED corresponding to the 11th row of scan lines emits light", but is not limited to this.In addition, since the default counting parameter ST indicates that the counter 12 accumulates to twelve, the comparison result of the comparator 13 corresponding to the default scanning sequence value SC5'~SC8' only has the low logic level, so that the scanning drive signal Out5'~Out8' also only has the low logic level, so that the light-emitting diodes corresponding to the 13th to 16th scanning lines in the light-emitting diode array of the scanning display 10 do not emit light.

[0054] In summary, the drive system of this embodiment uses the configuration register 11 to configure the discontinuous default scan sequence values ​​SC1-SCn to define the row scan sequence of the scanning display 10, so that the scanning display 10 emits light in a skipping manner. In this way, the low-gray image of the display screen can be optimized, so that the user is not likely to feel the flickering of the display screen when watching the display screen, thereby improving the visual quality. In addition, the configuration register 11 is used to replace the existing technology of using a decoding circuit to implement the scan drive device, so that the first and second scan drive devices 1 and 3 can be connected in series, thereby simplifying the wiring layout design of the first and second scan drive devices 1 and 3 and the control device 2 on the printed circuit board, so that the manufacturing cost required for the drive system of this embodiment is lower.

[0055] The above are merely embodiments of the present invention and should not be used to limit the scope of the present invention. That is, any simple equivalent changes and modifications made according to the claims and description of the present invention still fall within the scope of the present invention.

Claims

1. A driving system for a scanning display, characterized in that: The drive system includes: The first scanning driving device comprises A configuration register is used to receive a sequence data input signal and a frequency signal, and configure a default counting parameter and a plurality of default scanning sequence values ​​respectively related to adjusting a corresponding row scanning sequence according to the sequence data input signal and the frequency signal, each default scanning sequence value being a variable value, a counter for receiving the frequency signal and an enable signal, and electrically connected to the configuration register to receive the default count parameter, and accumulating the frequency of the frequency signal according to the enable signal and the default count parameter to generate a count value, a plurality of comparators electrically connected to the configuration register to receive the default scan sequence values ​​respectively, and electrically connected to the counter to receive the count value, each comparator comparing the count value with the corresponding received default scan sequence value to generate a comparison result, the comparison result changes with the change of the corresponding received default scan sequence value, and A driver is used to receive the frequency signal and the enable signal, and is electrically connected to the comparator to receive multiple comparison results. The driver is controlled by the enable signal to operate in one of a normal mode and a shutdown mode, and generates multiple scan drive signals based on at least the frequency signal and the comparison results and outputs them to the scanning display to drive the scanning display to emit light. When the driver operates in the normal mode, the scan drive signals generated change with the changes of the comparison results, so that the scanning order of the scanning display changes in response to the scan drive signals.

2. The driving system of a scanning display according to claim 1, characterized in that: When the default scan sequence value is a discontinuous value, the scan driving signal generated when the driver operates in the normal mode drives the scanning display to skip rows and emit light.

3. The driving system of a scanning display according to claim 1, characterized in that: Also includes: The control device is electrically connected to the configuration register, the counter, and the driver, generates the sequence data input signal, the frequency signal, and the enable signal, and outputs the sequence data input signal and the frequency signal to the configuration register, and outputs the frequency signal and the enable signal to the counter and the driver.

4. The driving system of a scanning display according to claim 1, characterized in that: The first scan driving device has a sequence data output terminal, the sequence data input signal has a plurality of bits, the configuration register also shifts the bits of the sequence data input signal according to the frequency signal to generate a sequence data output signal, and outputs the sequence data output signal at the sequence data output terminal.

5. The driving system of a scanning display according to claim 4, characterized in that: Also includes: A plurality of second scanning drive devices, each of which has a sequence data input terminal and a sequence data output terminal, the sequence data input terminal of the first second scanning drive device among the second scanning drive devices is electrically connected to the sequence data output terminal of the first scanning drive device to receive the sequence data output signal, and the sequence data output terminal of the first second scanning drive device among two adjacent second scanning drive devices of the second scanning drive devices is electrically connected to the sequence data input terminal of the second second scanning drive device, so that the second scanning drive devices are connected in series and transmit the sequence data output signal in sequence, and each second scanning drive device is also used to receive the frequency signal and the enable signal.

6. The driving system of a scanning display according to claim 1, characterized in that: The scanning driving signals generated by the driver when operating in the shutdown mode do not change with the change of the comparison result, and the driver provides a discharge path for the scanning display.

7. The driving system of a scanning display according to claim 1, characterized in that: The drive includes an image afterimage elimination control circuit, for receiving the frequency signal and the enable signal, and electrically connected to the comparator to receive the comparison result, the image afterimage elimination control circuit is controlled by the enable signal to operate in one of the normal mode and the shutdown mode, and generates a plurality of control signals according to the frequency signal and the comparison result, the control signals generated when the image afterimage elimination control circuit operates in the normal mode change with the change of the comparison result, and the control signals generated when the image afterimage elimination control circuit operates in the shutdown mode do not change with the change of the comparison result, and A plurality of driving circuits are electrically connected to the afterimage elimination control circuit to receive the control signals respectively, and each driving circuit generates at least one corresponding one of the scanning driving signals according to the corresponding received control signal.

8. The driving system of a scanning display according to claim 7, characterized in that: The configuration register also configures a default adjustment signal for adjusting the size of the afterimage of the scanning display according to the sequence data input signal and the frequency signal, and Each driving circuit also receives a default blanking voltage and is electrically connected to the configuration register to receive the default adjustment signal, and generates the corresponding one of the scanning drive signals based on the default blanking voltage, the default adjustment signal and the corresponding received control signal, so that the size of the afterimage of the scanning display changes with the change of the default adjustment signal.

9. The driving system of a scanning display according to claim 8, characterized in that: Each drive circuit includes A voltage generating unit is used to receive the default blanking voltage and is electrically connected to the configuration register to receive the default adjustment signal and adjust the default blanking voltage according to the default adjustment signal to generate an output voltage. a first transistor having a first end for receiving a DC bias voltage, a second end for outputting the corresponding one of the scan drive signals, and a control end electrically connected to the afterimage elimination control circuit to receive a corresponding one of the control signals, and The second transistor has a first end electrically connected to the second end of the first transistor, a second end grounded, and a control end electrically connected to the voltage generating unit to receive the output voltage.

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