[Elecraft] K3 wish list - option to turn off display

[David Woolley]

AJSOENKE at aol.com wrote:
>  
> I don't think your concerns are warranted. The LCD is an array of  transistor 
> switches which affect the transmission of light by polarizing effects  of 

The sort of LCD display used on the K2, and I believe the K3, doesn't 
have any active components (such as transistors) on the display.

> their electrostatic field. The actual light is provided by backlighting from  
> light emitting diodes which are well known for their longevity.

When I first saw this thread, I assumed it was about wearing out the 
liquid crystals, not about the back light.  Actually driving the liquid 
crystals will eventually wear them out, as it is not possible to 
completely avoid DC components in the drive (LCDs are driven by AC 
(acutally complex waveforms that average to zero DC for both selected 
and non-selected elements) to avoid elecrolysing the liquid crystals.

I'd therefore say, don't worry about the backlight, except on power 
consumption grounds; it is the display itself you may want to power down.

>  
> The Day mode will shut off the LED backlights on the LCD, but unfortunately  
> it also ups the level of brightness for the LEDs on the controls. That would  
> seem to be a simple fix in the firmware.
>  
> Al WA6VNN
>  
>  
> In a message dated 4/27/2008 7:06:34 A.M. Pacific Daylight Time,  
> g3yiq at yahoo.co.uk writes:
> I increasingly like to operate remote, especially  when traveling.
> This can sometimes mean that the rig is turned on for several  days.
> I have some concern about burn-out of the LCD display in areas  where  
> it remains unchanged for long periods.
> Maybe this is an  unjustified worry, but it would be good to have the  
> option to simply  turn off the display when using remote operation, or  
> even when  operating the rig from a PC in the shack.
> 
> Bob,  G3YIQ
> 
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> 
> 
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David Woolley
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