51单片机8*8点阵一直闪烁

Question

51单片机中使用8*8点阵做了个笑脸，为什么一直在闪烁？有没有什么办法能让它稳定下来？

#include "regx52.h"
#include "Delay.h"
#include "T0.h"
sbit SER = P3 ^ 4;
sbit RCK = P3 ^ 5;
sbit SCK = P3 ^ 6;

unsigned char arr[]={
0x7E,0x91,0xA3,0xA5,
0xA3,0x91,0x7E,0x00,
0x00,0x7E,0xA1,0x93,
0x95,0x93,0xA1,0x7E,};


void _74hc595_init()
{
    SER = 0; RCK = 0; SCK = 0;
}
void _74hc595_data(unsigned char Data)
{
    unsigned char i;
    for (i = 0; i < 8; i++)
    {
        SER = Data & (0x80 >> i);
        SCK = 1; SCK = 0;
    }
    RCK = 1; RCK = 0; 
}
void _74hc595(unsigned char n, unsigned char Data)
{
    
    _74hc595_data(Data);
    P0 = ~(0x80 >> n);Delay(1);
    P0 = 0xff;

}
void main()
{
    unsigned  char k;

    _74hc595_init();
    while (1)
    {
        _74hc595(0,arr[0]);
        _74hc595(1,arr[1]);
        _74hc595(2,arr[2]);
        _74hc595(3,arr[3]);
        _74hc595(4,arr[4]);
        _74hc595(5,arr[5]);
        _74hc595(6,arr[6]);
        _74hc595(7,arr[7]);

Answer 1

最后我判断了一下，应该是扫描太慢了，我试着把Delay和消影删掉了，可以得到一个稳定有残影的图像，于是我把消影加上，发现LED变暗了，这个我暂时解决不了，不过这个问题算是解决了