WO2016041309A1 - Led显示控制方法及控制卡、led显示屏系统 - Google Patents

Led显示控制方法及控制卡、led显示屏系统 Download PDF

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Publication number
WO2016041309A1
WO2016041309A1 PCT/CN2015/070714 CN2015070714W WO2016041309A1 WO 2016041309 A1 WO2016041309 A1 WO 2016041309A1 CN 2015070714 W CN2015070714 W CN 2015070714W WO 2016041309 A1 WO2016041309 A1 WO 2016041309A1
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Prior art keywords
led display
scanning
scan
display control
round
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PCT/CN2015/070714
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English (en)
French (fr)
Inventor
梁伟
王伙荣
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西安诺瓦电子科技有限公司
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Application filed by 西安诺瓦电子科技有限公司 filed Critical 西安诺瓦电子科技有限公司
Priority to EP15797243.1A priority Critical patent/EP3023974A4/en
Priority to US14/948,362 priority patent/US20160078802A1/en
Publication of WO2016041309A1 publication Critical patent/WO2016041309A1/zh

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/06—Passive matrix structure, i.e. with direct application of both column and row voltages to the light emitting or modulating elements, other than LCD or OLED
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0218—Addressing of scan or signal lines with collection of electrodes in groups for n-dimensional addressing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0283—Arrangement of drivers for different directions of scanning
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0257—Reduction of after-image effects

Definitions

  • the invention relates to the technical field of LED display control, in particular to an LED display control method, an LED display system and an LED display control card.
  • FIG. 1 is a partial circuit diagram of an LED lamp board of a conventional scanning LED display screen. As shown in FIG. 1, it includes an n ⁇ m light emitting diode arranged in a matrix, a row selection signal decoder, and a driving chip. Wherein, each of the light emitting diodes is electrically connected to the position where the row lines L1, . . . , Ln and the column lines C1, . . . , Cn intersect, and the anode of the same row of LEDs is electrically connected to the power supply voltage VCC and the row selection signal through the same row line such as Ln.
  • the same output pin of the encoder, the negative pole of the same column LED is electrically connected to the same pin of the driving chip through the same column line, for example, Cn, and each row line has a parasitic capacitance to the ground potential.
  • the existing control system usually adopts a sequential round-robin scanning mode.
  • n-scan ie, n-line
  • the conventional method is to drive the first sweep first, and then drive the second sweep until the end. Sweep (nth sweep), then start again from the first sweep until the nth sweep, and so on. See Figure 2 for details.
  • the afterglow corresponding to the second sweep appears in the first sweep
  • the afterglow of the third sweep appears in the second sweep
  • the last sweep (nth sweep) is The first sweep of the first sweep
  • the afterglow corresponding to the first sweep appears in the nth sweep
  • the nth sweep is away from the first sweep
  • the afterglow generated on the nth sweep is very abrupt, which causes the play to have a black background.
  • the picture is easy to see the afterglow point away from the normal lighting area in the black background area, affecting the viewing experience. These points are called isolated point afterglow.
  • Figure 3 shows an example of an 8-scan display unit.
  • the uppercase letters AH, MP, and RW are points that need to be lit normally.
  • the lowercase letters ah, mp, and rw with slash fill indicate afterglow, where the isolated point is Point a and m, n, o, p.
  • the embodiments of the present invention provide an LED display control method suitable for applying multiple LEDs electrically connected to N scan lines, where N is a positive integer greater than 1.
  • the LED display control method includes the steps of: receiving a row selection signal and decoding the received row selection signal in a first round of scanning to sequentially sequence the N scan lines in a first scan order Scanning to drive the plurality of LEDs; and in a second round of scanning, receiving a row select signal and decoding the received row select signal to sequentially scan the N scan lines in a second scan order
  • the plurality of LEDs are controlled by driving; wherein the first round scanning process and the second round scanning process alternate, and the first scanning order and the second scanning order are reversed to each other.
  • the row select signal is a multi-bit digital signal.
  • the digital signal is a 2-bit digital signal, a 3-bit digital signal, or a 4-bit digital signal; accordingly, N has a value of 4, 8, or 16.
  • an embodiment of the present invention provides an LED display screen system including an LED display control card and an LED light panel electrically connected to the LED display control card.
  • the LED lamp panel is provided with a decoder and a plurality of LEDs electrically connected to the N scan lines, N being a positive integer greater than one.
  • the LED display control card is provided with a forward and reverse sequential scan drive module, and the forward and reverse sequential scan drive module is configured to: during a first round of scanning, generate a row select signal to the decoder to Decoding the received row select signal and sequentially scanning the N scan lines in a first scan order to drive control of the plurality of LEDs; and generating a line during a second round of scanning Selecting a signal to the decoder to decode the received row select signal by the decoder and sequentially scanning the N scan lines in a second scan order to drive control of the plurality of LEDs; The first round scanning process and the second round scanning process alternate, and the first scanning order and the second scanning order are reversed to each other.
  • the row select signal generated in the LED display system described above is a multi-bit digital signal.
  • the LED display control card is provided with a programmable logic device, and the forward and reverse sequential alternate scan driving module and the programmable logic device are integrated in the same chip.
  • an embodiment of the present invention further provides an LED display control card adapted to receive an image signal and process the received image signal to drive and control the LED light panel.
  • the LED light panel is provided with a plurality of LEDs electrically connected to N scan lines, and N is a positive integer greater than 1.
  • the LED display control card is provided with a forward and reverse sequential scan drive module.
  • the forward and reverse sequential scan driving module is configured to: during a first round of scanning, generate a row selection signal to the LED light panel to control the LED light panel to scan the N scan lines according to a first scan order Performing a sequential scan to drive control of the plurality of LEDs; and during a second round of scanning, generating a row select signal to the LED light panel to control the LED light panel to scan the N scans in a second scan order
  • the lines are sequentially scanned to drive control of the plurality of LEDs; wherein the first round of scanning process and the second round of scanning processes alternate, and the first scanning order and the second scanning order are reversed to each other.
  • the LED display control card generates a row select signal that is a multi-bit digital signal.
  • the LED display control card is a receiving card or an asynchronous card.
  • the LED display control card is provided with a programmable logic device, such as an FPGA, and the forward and reverse sequential scan drive modules are integrated with the programmable logic device in the same chip.
  • a programmable logic device such as an FPGA
  • the present invention can design the positive and negative sequential alternate scanning mode, so that the afterglow point can be distributed in the up and down sweeps of the LED light points that need to be normally lit, but there will be no isolated point afterglow. That is to say, the effect of eliminating the afterglow of the isolated point can be achieved, thereby improving the user's viewing experience.
  • FIG. 1 is a partial circuit diagram of an LED lamp panel of a conventional scanning LED display screen.
  • FIG. 2 is a schematic diagram of a conventional line scanning method.
  • FIG. 3 is a schematic view showing the display effect of the conventional line scanning method shown in FIG. 2.
  • FIG. 4 is a schematic diagram of a line scanning mode according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram showing the display effect of the line scanning method shown in FIG. 4 according to an embodiment of the present invention.
  • FIG. 6 is a partial block diagram of an LED display screen system according to an embodiment of the present invention.
  • FIG. 7 is a partial block diagram of an LED display control card according to an embodiment of the present invention.
  • the scanning mode designed by the embodiment of the present invention is a forward-reverse sequential scanning, which receives a row selection signal during a first round of scanning and decodes the received row selection signal to n scan lines according to the first scanning order. Performing a sequential scan to drive control of a plurality of LEDs electrically coupled to the n scan lines, and receiving a row select signal during a second round scan and decoding the received row select signal to follow the second scan order.
  • the n scan lines are sequentially scanned to drive a plurality of LEDs electrically connected to the n scan lines.
  • the first scanning process and the second scanning process are alternately performed, and the first scanning sequence and the second scanning sequence are mutually reversed.
  • the [row] in the [row selection signal] in the present invention is only a conventional term in the art, and is not limited to the horizontal direction or the vertical direction.
  • the positive and negative sequential alternate scanning mode of the embodiment of the present invention is that the first round scan is the first scan sequentially to the nth scan (that is, the last scan), and the next round is from the nth scan. Sweep to the first sweep, then the next round of recovery to the first sweep scan to the nth scan, the next round from the nth sweep to the first sweep, and so on.
  • the afterglow points are distributed in the up and down sweeps requiring normal lighting points, but there will be no isolated point afterglow. Comparing FIG. 3 and FIG. 5, it can be found that the conventional manner shown in FIG. 2 and FIG. 3 may have isolated afterglow point a and m, n, o, p points, and the embodiment of the present invention shown in FIG. 5 and FIG. The positive and negative sequential scanning method no longer has isolated afterglow points, so the user's viewing experience can be effectively improved.
  • an LED display system 10 includes an LED display control card 11 and an LED light panel 13.
  • the LED display control card 11 may be a combination of a receiving card or a receiving card and a front end transmitting card; for an asynchronous control LED display system, the LED display control card 11 may be an asynchronous card.
  • the LED light board 13 may be a single color LED light board, a two-color LED light board or a full-color LED light board, and the number may be one or more.
  • a partial structure of a single LED panel 13 may be referred to FIG.
  • the LED display control card 11 is usually provided with a programmable logic device, such as an FPGA chip, for receiving an image signal input from the front end and performing image data processing to drive and control the LED light panel 13.
  • a programmable logic device such as an FPGA chip
  • the LED display control card 11 of the present embodiment is further provided with a forward and reverse sequential scan drive module 111, which is integrated with the programmable logic device, for example, integrated into the same chip.
  • the forward and reverse sequential scan drive module 111 of the present embodiment is a software module stored in a nonvolatile memory and executed by the FPGA chip to generate a desired row select signal to the LED light panel 13 to control the LED light panel 13
  • the n scan lines are sequentially scanned in a first scan sequence and the n scan lines are sequentially scanned in the second scan sequence during the next scan.
  • the first scan order and the second scan order are reversed to each other, for example, the first scan order is from the first scan to the nth scan and the second scan sequence is from the nth scan to the first scan, and vice versa.
  • the first sweep is performed; when the row selection signal is "001", the second sweep is performed; when the row selection signal is "010", the third sweep is performed; when the row selection signal is "011", Then, the fourth scan is performed; when the row selection signal is "100”, the fifth scan is performed; when the row selection signal is "101”, the sixth scan is performed; when the row selection signal is "110", the seventh scan is performed; When the selection signal is "111", the eighth sweep (i.e., the nth sweep) is performed.
  • the row selection signal of the present invention is not limited to a 3-bit digital signal, and may be a 2-bit (2-bit) digital signal, a 4-bit (4-bit) digital signal, or another digit digital signal, and accordingly a single round scan.
  • the process can be 4 sweeps, 16 sweeps or other sweeps.
  • the forward and reverse sequential scan driving module 111 of the above embodiment of the present invention is not limited to a software module, and may also be implemented by using a hardware structure, for example, the row selection signal is 3 digits regardless of which round of scanning process.
  • a digital signal sequence such as "000”, "001”, “010”, “011”, “100”, “101”, “110”, and "111" is sequentially generated by a programmable logic device such as an FPGA.
  • the digital signals generated by the FPGA can be reversed by using a set of inverters in the forward/reverse sequence alternate scan driving module 111, thereby obtaining "111", "110", and " Digital signal sequences such as 101”, “100”, “011”, “010”, “001”, and "000” can also implement the forward-reverse sequential scanning mode of the present invention.
  • the above embodiment of the present invention can design the positive and negative sequential alternate scanning mode, so that the afterglow points can be distributed in the up and down sweeps of the LED lights that need to be normally lit, but there will be no isolated point afterglow. That is to say, the effect of eliminating the afterglow of the isolated point can be achieved, thereby improving the user's viewing experience.
  • the afterglow point can be distributed in the up and down scans of the LED spot that needs to be normally lit, but there will be no afterglow of the isolated point. That is to say, the effect of eliminating the afterglow of the isolated point can be achieved, thereby improving the user's viewing experience.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)

Abstract

一种LED显示控制方法及控制卡（11）、LED显示屏系统（10），适于应用在电连接N个扫描线的多个LED。显示控制方法包括步骤：在第一轮扫描过程中，接收行选择信号并对接收的行选择信号进行译码以按照第一扫描顺序对N个扫描线进行顺序扫描从而驱动控制多个LED；以及在第二轮扫描过程中，接收行选择信号并对接收的行选择信号进行译码以按照第二扫描顺序对N个扫描线进行顺序扫描从而驱动控制多个LED；其中，第一轮扫描过程和第二轮扫描过程交替进行，且第一扫描顺序和第二扫描顺序互为反序。LED显示控制方法通过采用正反序交替扫描方式，可以消除孤立点余辉，进而提升用户的观看感受。

Description

LED显示控制方法及控制卡、LED显示屏系统
技术领域
本发明涉及LED显示控制技术领域，尤其涉及一种LED显示控制方法、一种LED显示屏系统以及一种LED显示控制卡。
背景技术
请参阅图1，其为现有的一种扫描式LED显示屏的LED灯板局部电路示意图。如图1所示，其包括以行列方式排布的n×m发光二极管、行选择信号译码器以及驱动芯片。其中，各个发光二极管电连接至行线L1,…,Ln和列线C1,…,Cn交叉的位置，同一行LED的正极通过同一条行线例如Ln电连接至电源电压VCC和行选择信号译码器的同一个输出引脚，同一列LED的负极通过同一条列线例如Cn电连接至驱动芯片的同一个引脚，各条行线对接地电位分别具有一个寄生电容。
现有的控制系统通常采用顺序轮循扫描方式，对于一个n扫(也即n条行线)的LED显示屏来说，传统的方法为先驱动第一扫，再驱动第二扫，直到最后一扫（第n扫），然后再次从第一扫开始直到第n扫，如此反复，具体可参阅图2。
若轮到某扫时有LED灯点亮，由于扫描式LED屏行线对地存在寄生电容，则该扫的前一扫的行线寄生电容中存储的电荷也能驱动该前一扫中与当前扫正常需要点亮的LED灯共享列线的LED灯微微点亮，该现象称为余辉。按照上面提到的现有控制系统的扫描方式，第2扫对应的余辉在第1扫出现，第3扫的余辉在第2扫出现，以此类推，由于最后一扫（第n扫）是第一扫的前一扫，第1扫对应的余辉在第n扫出现，而第n扫是远离第1扫的，第n扫上产生的余辉很是突兀，这样就会导致播放有黑色背景的画面容易在黑色背景区看到与正常点亮区域远离的余辉点，影响观看感受，这些点称为孤立点余辉。图3以一个8扫的显示单元为例示意这种现象，大写字母A-H,M-P,R-W为需要正常点亮的点，带斜线填充的小写字母a-h,m-p,r-w表示余辉，其中孤立点为a点和m,n,o,p点。
因此，有必要解决上面提到的孤立点余辉，以提升用户的观看感受。
发明内容
因此，为克服现有技术存在的技术缺陷，本发明实施例提供一种LED显示控制方法，适于应用在电连接N个扫描线的多个LED，N为大于1的正整数。具体地，所述LED显示控制方法包括步骤：在一第一轮扫描过程中，接收行选择信号并对接收的行选择信号进行译码以按照第一扫描顺序对所述N个扫描线进行顺序扫描以驱动控制所述多个LED；以及在一第二轮扫描过程中，接收行选择信号并对接收的行选择信号进行译码以按照第二扫描顺序对所述N个扫描线进行顺序扫描以驱动控制所述多个LED；其中，第一轮扫描过程和第二轮扫描过程交替进行，且第一扫描顺序和第二扫描顺序互为反序。
在本发明的一个实施例中，上述行选择信号为多位(bit)数字信号。
在本发明的一个实施例中，上述数字信号为2位数字信号、3位数字信号或4位数字信号；相应地，N的取值为4、8或16。
此外，本发明实施例提供一种LED显示屏系统，包括LED显示控制卡和与所述LED显示控制卡电连接的LED灯板。所述LED灯板上设置有译码器以及电连接至N个扫描线的多个LED，N为大于1的正整数。所述LED显示控制卡设置有正反序交替扫描驱动模块，所述正反序交替扫描驱动模块用于：在一第一轮扫描过程中，产生行选择信号至所述译码器以由所述译码器对接收的行选择信号进行译码并按照第一扫描顺序对所述N个扫描线进行顺序扫描以驱动控制所述多个LED；以及在一第二轮扫描过程中，产生行选择信号至所述译码器以由所述译码器对接收的行选择信号进行译码并按照第二扫描顺序对所述N个扫描线进行顺序扫描以驱动控制所述多个LED；其中，第一轮扫描过程和第二轮扫描过程交替进行，且第一扫描顺序和第二扫描顺序互为反序。
在本发明的一个实施例中，上述LED显示屏系统中产生的行选择信号为多位数字信号。
在本发明的一个实施例中，上述LED显示控制卡设置有可编程逻辑器件，所述正反序交替扫描驱动模块和所述可编程逻辑器件整合在同一芯片中。
另外，本发明实施例还提供一种LED显示控制卡，适于接收图像信号并对接收的图像信号进行处理以驱动控制LED灯板。所述LED灯板上设置有电连接至N个扫描线的多个LED，N为大于1的正整数。再者，所述LED显示控制卡设置有正反序交替扫描驱动模块。所述正反序交替扫描驱动模块用于：在一第一轮扫描过程中，产生行选择信号至所述LED灯板以控制所述LED灯板按照第一扫描顺序对所述N个扫描线进行顺序扫描以驱动控制所述多个LED；以及在一第二轮扫描过程中，产生行选择信号至所述LED灯板以控制所述LED灯板按照第二扫描顺序对所述N个扫描线进行顺序扫描以驱动控制所述多个LED；其中，第一轮扫描过程和第二轮扫描过程交替进行，且第一扫描顺序和第二扫描顺序互为反序。
在本发明的一个实施例中，上述LED显示控制卡产生的行选择信号为多位数字信号。
在本发明的一个实施例中，上述LED显示控制卡为接收卡或异步卡。
在本发明的一个实施例中，上述LED显示控制卡设置有可编程逻辑器件，例如FPGA，所述正反序交替扫描驱动模块与所述可编程逻辑器件整合在同一芯片中。
由上可知，本发明通过设计出正反序交替扫描方式，可以使得余辉点在需要正常点亮LED灯点的上下扫都有分布，但是将不存在孤立点余辉。也即，可以达成消除孤立点余辉的效果，进而提升用户的观看感受。
通过以下参考附图的详细说明，本发明的其它方面和特征变得明显。但是应当知道，该附图仅仅为解释的目的设计，而不是作为本发明的范围的限定，这是因为其应当参考附加的权利要求。还应当知道，除非另外指出，不必要依比例绘制附图，它们仅仅力图概念地说明此处描述的结构和流程。
附图概述
图1为现有的一种扫描式LED显示屏的LED灯板的局部电路示意图。
图2为现有的行扫描方式示意图。
图3为现有的采用图2所示行扫描方式的显示效果示意图。
图4为本发明实施例的一种行扫描方式示意图。
图5为本发明实施例的采用图4所示行扫描方式的显示效果示意图。
图6为本发明实施例的一种LED显示屏系统的局部模块示意图。
图7为本发明实施例的一种LED显示控制卡的局部模块示意图。
本发明的较佳实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。
本发明实施例设计出的扫描方式为正反序交替扫描，其在一第一轮扫描过程中接收行选择信号并对接收的行选择信号进行译码以按照第一扫描顺序对n个扫描线进行顺序扫描以驱动控制与所述n个扫描线电连接的多个LED，以及在一第二轮扫描过程中接收行选择信号并对接收的行选择信号进行译码以按照第二扫描顺序对n个扫描线进行顺序扫描以驱动控制与所述n个扫描线电连接的多个LED。其中，第一轮扫描过程和第二轮扫描过程交替进行，且第一扫描顺序和第二扫描顺序互为反序。在此需要说明的是，本发明中的【行选择信号】中的【行】仅是本领域的惯用叫法，其并不限制于水平方向或垂直方向。
为便于理解，请参阅图4，本发明实施例的正反序交替扫描方式为首轮扫描为第1扫依次扫描到第n扫(也即最后一扫)，下一轮为从第n扫倒扫至第1扫，然后下一轮恢复为第1扫依次扫描到第n扫，下一轮又为从第n扫倒扫至第1扫，依次类推。
请参阅图5，按照本发明实施例的正反序交替扫描方式，余辉点在需要正常点亮点的上下扫都有分布，但是将不存在孤立点余辉。比较图3和图5可以发现，图2及图3所示的传统方式会存在孤立余辉点a点和m,n,o,p点，而图5及图5所示的本发明实施例的正反序交替扫描方式不再有孤立余辉点出现，因此用户的观看感受能够得到有效改善。
请参阅图6，本发明实施例提出的一种LED显示屏系统10，其包括LED显示控制卡11和LED灯板13。其中，对于同步控制LED显示屏系统，LED显示控制卡11可以是接收卡或者接收卡和前端发送卡的组合；对于异步控制LED显示屏系统，LED显示控制卡11可以是异步卡。此外，LED灯板13可以是单色LED灯板、双色LED灯板或全彩LED灯板，其数量可以为一个也可以是多个。单个LED灯板13的局部结构可参考图1，其例如包括：译码器以用于接收行选择信号并对接收的行选择信号进行译码，以及驱动芯片以用于接收图像数据信号以对需点亮的LED进行灰度级实现。另外，LED显示控制卡11上通常设置有可编程逻辑器件，例如FPGA芯片，其用于接收前端输入的图像信号并进行图像数据处理以驱动控制LED灯板13。当然，可以理解的是，为配合正反序交替扫描方式，可编程逻辑器件提供给LED灯板13的图像数据的提供方式也需要做适应性的调整，也即需要确保当前提供的图像数据为当前扫所需的图像数据，如此才可以实现正确的显示。
请参阅图7，本实施例的LED显示控制卡11还设置有正反序交替扫描驱动模块111，其与可编程逻辑器件整合在一起，例如整合至同一芯片内。例如，本实施例的正反序交替扫描驱动模块111为软件模块，其存储于非易失性存储器并由FPGA芯片执行以产生所需的行选择信号至LED灯板13来控制LED灯板13在一某一轮扫描过程中按照第一扫描顺序对n个扫描线进行顺序扫描并在下一轮扫描过程中按照第二扫描顺序对n个扫描线进行顺序扫描。其中，第一扫描顺序和第二扫描顺序互为反序，例如第一扫描顺序为从第1扫到第n扫且第二扫描顺序为从第n扫到第1扫，反之亦然。
在本发明的上述实施例中，行选择信号为多位数字信号，以3位(3-bit)数字信号为例，其对应的单轮扫描过程例如为8扫(也即对应n=8)。当行选择信号为“000”，则进行第1扫；当行选择信号为“001”，则进行第2扫；当行选择信号为“010”，则进行第3扫；当行选择信号为“011”，则进行第4扫；当行选择信号为“100”，则进行第5扫；当行选择信号为“101”，则进行第6扫；当行选择信号为“110”，则进行第7扫；以及当行选择信号为“111”，则进行第8扫(也即第n扫)。当然，本发明的行选择信号并不限于3位数字信号，也可以是2位(2-bit)数字信号、4位(4-bit)数字信号或其他位数数字信号，相应地单轮扫描过程可以为4扫、16扫或其他扫。
可以理解的是，本发明上述实施例的正反序交替扫描驱动模块111并不限于软件模块，也可以利用硬件结构来实现，例如不论哪一轮扫描过程，仍以行选择信号为3位数字信号为例，由可编程逻辑器件例如FPGA始终依序产生“000”、“001”、“010”、“011”、“100”、“101”、“110”及“111”等数字信号序列，当需要进行反序扫描时，则可利用正反序交替扫描驱动模块111中的一组反相器将FPGA产生的数字信号进行取反操作，从而可以得到“111”、“110”、“101”、“100”、“011”、“010”、“001”及“000”等数字信号序列，如此同样可以实现本发明的正反序交替扫描方式。
由上可知，本发明上述实施例通过设计出正反序交替扫描方式，可以使得余辉点在需要正常点亮LED灯点的上下扫都有分布，但是将不存在孤立点余辉。也即，可以达成消除孤立点余辉的效果，进而提升用户的观看感受。
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明,任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内,当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰,均仍属于本发明技术方案的范围内。
工业实用性
本发明实施例通过设计出正反序交替扫描方式，可以使得余辉点在需要正常点亮LED灯点的上下扫都有分布，但是将不存在孤立点余辉。也即，可以达成消除孤立点余辉的效果，进而提升用户的观看感受。

Claims (1)

  1. 一种LED显示控制方法，适于应用在电连接N个扫描线的多个LED，N为大于1的正整数，其特征在于，包括步骤：
    在一第一轮扫描过程中，接收行选择信号并对接收的行选择信号进行译码以按照第一扫描顺序对所述N个扫描线进行顺序扫描以驱动控制所述多个LED；以及
    在一第二轮扫描过程中，接收行选择信号并对接收的行选择信号进行译码以按照第二扫描顺序对所述N个扫描线进行顺序扫描以驱动控制所述多个LED；
    其中，所述第一轮扫描过程和所述第二轮扫描过程交替进行，且所述第一扫描顺序和所述第二扫描顺序互为反序。
    2. 如权利要求1所述的LED显示控制方法，其特征在于，所述行选择信号为多位数字信号。
    3. 如权利要求1所述的LED显示控制方法，其特征在于，所述数字信号为2位数字信号、3位数字信号或4位数字信号。
    4. 一种LED显示屏系统，包括LED显示控制卡和与所述LED显示控制卡电连接的LED灯板，所述LED灯板上设置有译码器以及电连接至N个扫描线的多个LED，N为大于1的正整数；其特征在于，
    所述LED显示控制卡设置有正反序交替扫描驱动模块，所述正反序交替扫描驱动模块用于：
    在一第一轮扫描过程中，产生行选择信号至所述译码器以由所述译码器对接收的行选择信号进行译码并按照第一扫描顺序对所述N个扫描线进行顺序扫描以驱动控制所述多个LED；以及
    在一第二轮扫描过程中，产生行选择信号至所述译码器以由所述译码器对接收的行选择信号进行译码并按照第二扫描顺序对所述N个扫描线进行顺序扫描以驱动控制所述多个LED；
    其中，所述第一轮扫描过程和所述第二轮扫描过程交替进行，且所述第一扫描顺序和所述第二扫描顺序互为反序。　
    5. 如权利要求4所述的LED显示屏系统，其特征在于，所述行选择信号为多位数字信号。
    6. 如权利要求4所述的LED显示屏系统，其特征在于，所述LED显示控制卡设置有可编程逻辑器件，所述正反序交替扫描驱动模块和所述可编程逻辑器件整合在同一芯片中。
    7. 一种LED显示控制卡，适于接收图像信号并对接收的图像信号进行处理以驱动控制LED灯板，所述LED灯板上设置有电连接至N个扫描线的多个LED，N为大于1的正整数；其特征在于，所述LED显示控制卡设置有正反序交替扫描驱动模块，所述正反序交替扫描驱动模块用于：
    在一第一轮扫描过程中，产生行选择信号至所述LED灯板以控制所述LED灯板按照第一扫描顺序对所述N个扫描线进行顺序扫描以驱动控制所述多个LED；以及
    在一第二轮扫描过程中，产生行选择信号至所述LED灯板以控制所述LED灯板按照第二扫描顺序对所述N个扫描线进行顺序扫描以驱动控制所述多个LED；
    其中，所述第一轮扫描过程和所述第二轮扫描过程交替进行，且所述第一扫描顺序和所述第二扫描顺序互为反序。
    8. 如权利要求7所述的LED显示控制卡，其特征在于，所述行选择信号为多位数字信号。
    9. 如权利要求7所述的LED显示控制卡，其特征在于，所述LED显示控制卡为接收卡或异步卡。
    10. 如权利要求7所述的LED显示控制卡，其特征在于，所述LED显示控制卡设置有可编程逻辑器件，所述正反序交替扫描驱动模块与所述可编程逻辑器件整合在同一芯片中。
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CN113270060A (zh) * 2021-04-30 2021-08-17 西安诺瓦星云科技股份有限公司 图像数据传输方法及装置、显示控制器、显示屏控制系统

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