The burn-in protection on Venu2(s) devices with CIQ4 falsely triggers and turns off the display

I have ported several watch faces with Venu1 AOD support to the Venu2 and Venu2s devices.

My AOD modes are straight forward. I'm using a dense pattern clearing every 2nd pixel row or column on the screen alternating each minute starting with the first row/column or the second row/column.

This ensures that less than 10% of the pixels are on and no particular pixel is on for more than 1 minute.

On the Venu2 the simulator detects a screen burn-in. On the Screen Burn-In Simulation window it looks like the overlay pattern is ignored.

Also some drawing artifacts are missing on the burn-in screen for example the minute and hour hands.

I'm in contact with 2 other developers who have similar problems with at least some of their watch faces.

I already uploaded my watch faces with Venu2 support to the Connect IQ store and received feedback from a user who also owns a Venu1 that

the AOD is not working on his new Venu2. - It turns off the screen.

So this is potentially not only a problem of the simulator but also of the actual device.

Here is a screen recording of the problem in action highlighting the differences between Venu1 and Venu2:

https://drive.google.com/file/d/123bDerdGzCovWEcJlxonKbRBSo96lqrq/view?usp=drivesdk

Manuel B.

Parents

Manuel B. over 4 years ago in reply to Johnny.ConnectIQ

FYI:

I had to do one last small correction to my code.

Initially I had

temp_dc.drawLine(0, y, mDcWidth, y);
and
temp_dc.drawLine(x, 0, x, mDcHeight);

just like in your code. I did draw this extra pixel to make the Venu1 AOD work and I thought I can remove it since I'm now drawing without antialiasing.

I was wrong.

For the Venu1 and D2 Air devices I have to draw the extra pixel on the right and the bottom edge of the display. - Even with antialiasing turned off!

Here is a modified version of your example that works on the Venu2 but triggers the Venu1 and D2 Air burn-in protection.

No big deal but something that needs to be considered in our watch faces.

var _cnt = 0;
function onUpdate(dc as Dc) as Void {
    dc.setColor(Graphics.COLOR_BLACK, Graphics.COLOR_BLACK);
    dc.clear();
    dc.setColor(Graphics.COLOR_WHITE, Graphics.COLOR_BLACK);
    dc.fillRectangle(206, 0, 20, 40);
    dc.fillRectangle(206, dc.getHeight() - 40, 20, 40);
    dc.setPenWidth(1);
    dc.setColor(Graphics.COLOR_BLACK, Graphics.COLOR_BLACK);
    var delta = _cnt%2;
    for(var x = delta; x < dc.getWidth(); x+=2) {
        dc.drawLine(x, 0, x, dc.getHeight() - 1);
    }
    ++_cnt;
}

And here is my fixed hopefully final version of the overlay pattern.

if(ProtectAgainstBurnInWithLinePattern())
{
    temp_dc.setAntiAlias(false);
    temp_dc.setPenWidth(1);
    temp_dc.setColor(Graphics.COLOR_BLACK, Graphics.COLOR_BLACK);

    if(VENU_AOD_HORIZONTAL_LINES == mVenuAOD)
    {            
        for(var y = mToggle ? 0 : 1; y < mDcHeight; y+=2)
        {
            temp_dc.drawLine(0, y, mDcWidth/* - 1*/, y); //One extra pixel on the right edge for the Venu1
        }
    }
    else
    {
        for(var x = mToggle ? 0 : 1; x < mDcWidth; x+=2)
        {
            temp_dc.drawLine(x, 0, x, mDcHeight/* - 1*/); //One extra pixel on the bottom edge for the Venu1
        }
    }
}

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