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i.MX6 LCD display problem: Projector Shadow display

Question asked by Guo Chancen on Mar 17, 2015
Latest reply on Apr 7, 2015 by jamesbone

Hi all,

        Now I have made a project of Camera-Projection with i.MX6 quad, it can display now.

        However when display the real-time image from the camera, the early image will not clear until ~30 seconds,like following:

        1.I put a paper under the camera

IMG_20150317_170839.jpg

2. When I move the paper, the image is still display

IMG_20150317_170848.jpg

 

 

My projector parameters are as following:

 

QVGA

 

Description               Min          Type            Max     Unit

Horizontal total         344           400              488     Pixel

Horizontal active        -               320             -          Pixel

Horizontal blank         -               80               -         Pixel

Vertical total             251           300             2000    line

Vertical active            -              240             -          line

Vertical blank             -              60              -          line

 

My linux driver is:

/* 320x240 @ 120 Hz , pixel clk @ 14.4MHz */

const char *name;  "My_projector",

u32 refresh; 120,

u32 xres;  320,

u32 yres;  240,

u32 pixclock;  69444,

u32 left_margin; 20,

u32 right_margin;  59,

u32 upper_margin;  20,

u32 lower_margin;  39,

u32 hsync_len;  1,

u32 vsync_len;  1,

u32 sync;  0,

u32 vmode;  FB_VMODE_NONINTERLACED,

u32 flag;  0,

 

What's the problem? What should I do?

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