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#1 2017-03-08 14:43:27

MSG
Member
Registered: 2017-03-07
Posts: 7

7 inch LCD 800x480 calibration error

Hi, I would like more information about the orientation of my 800x480 LCD screen,
My configuration in config.txt is this:

hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (here we are forcing 800x480!)
hdmi_group=2
hdmi_mode=1
hdmi_mode=87
hdmi_cvt=800 480 60 6 0 0 0

I put a circle 50x50mm in the correct width and the height becomes smaller can anyone help me?

PS: The file image was generated in 800x480 in the nanodlp settings with 800x480 resolution.

Thanks.

Last edited by MSG (2017-03-08 14:44:02)

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#2 2017-03-08 17:21:39

Shahin
Administrator
Registered: 2016-02-17
Posts: 1,834

Re: 7 inch LCD 800x480 calibration error

It is probably overscan issue try change settings on config.txt,

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#3 2017-03-08 17:23:52

MSG
Member
Registered: 2017-03-07
Posts: 7

Re: 7 inch LCD 800x480 calibration error

What to put on the overscan?

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#4 2017-03-08 17:34:32

Shahin
Administrator
Registered: 2016-02-17
Posts: 1,834

Re: 7 inch LCD 800x480 calibration error

try disable_overscan=0 or disable_overscan=1 based on your current settings.

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#5 2017-03-08 17:45:02

MSG
Member
Registered: 2017-03-07
Posts: 7

Re: 7 inch LCD 800x480 calibration error

Still the same error the circle has 50mm, more when it is designed it is 50mm wide by 46.70 high!


#hdmi_pixel_encoding=2
start_x=1
gpu_mem=128

# 7 inch LCD Display monitor ebay 800x480 AT070TN90
#framebuffer_width=800
#framebuffer_height=480
#max_framebuffer_width = 800
#max_framebuffer_height = 480
#config_hdmi_boost=4
disable_overscan= 1
#hdmi_group=1
#hdmi_mode=87
#set specific CVT mode
#hdmi_cvt 800 480 60 6 0 0 0
hdmi_force_hotplug=1
hdmi_group=2
hdmi_mode=1
hdmi_mode=87
hdmi_cvt=800 480 60 6 0 0 0
disable_camera_led=1
dtparam=i2c1=on
dtparam=i2c_arm=on

Last edited by MSG (2017-03-08 17:46:53)

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#6 2017-03-08 18:08:30

Shahin
Administrator
Registered: 2016-02-17
Posts: 1,834

Re: 7 inch LCD 800x480 calibration error

I could not think of anything else causing black border around the display.

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#7 2017-03-08 18:11:50

MSG
Member
Registered: 2017-03-07
Posts: 7

Re: 7 inch LCD 800x480 calibration error

What to do?

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#8 2017-03-08 18:13:55

MSG
Member
Registered: 2017-03-07
Posts: 7

Re: 7 inch LCD 800x480 calibration error

I'm using Slicer.js to slice the images!

Dot pitch (mm) 0.19
Width (px)
800
Height (px)
480
Diagonal size
7
Diagonal unit in mm

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