LCD screen burn-in on 7960 IP Phone? 1

[lavamantis]

We're installing a CallManager with 7940 and 7960 phones. I put our company's logo on the idle page on our test phones, and I've noticed a distinct burn-in pattern on my 7960. My understanding of LCD is that this isn't supposed to happen.

Is this my imagination or do these phones really burn in? Our phone vendor can't explain it.

Next question: if there is burn in, I'll create a few different versions of the company logo and load a different one each day. But, that will only work if the phone is reset or used. What about the phones that sit for days at a time, like the lobby phone? I can't see how to configure an auto-refresh setting for the image.

John

 

[filakio]

How long have you had your phones? We have our company logo on as well but haven't noticed a burn yet.

You can actually see the logo even with the phone unplugged?


- Fil

 

[AdmanOK]

I haven't seen a problem with burn in on my screens... but if you are concerned you could create an ASP page with refresh tags that would cycle to a new image every five minutes.

 

[AdmanOK]

Below is an example of how you could do something like this... the refresh tags are assuming that your idle page is located at

http://servername/cisco/idle/default.asp

Just replace the CiscoIPPhoneImage tag inside each section with unique logo information and you will cycle between them!

<%@ Language=VBScript%>
<%
pageid = Request.QueryString(&quot;pageid&quot;)
totalpages = 3
if pageid = &quot;&quot; then pageid = 1 end if
newpageid = pageid + 1
if newpageid > totalpages then newpageid = 1 end if
serverIP = Request.ServerVariables(&quot;LOCAL_ADDR&quot;)
Response.ContentType = &quot;text/xml&quot;

' Page 1
if pageid = 1 then
refreshtime = 300
Response.AddHeader &quot;Refresh&quot;, refreshtime & &quot;; url=http://&quot; & serverIP & &quot;/cisco/idle/default.asp?pageid=&quot; & newpageid
%>
<CiscoIPPhoneImage>
  <LocationX>-1</LocationX>
  <LocationY>-1</LocationY>
  <Width>130</Width>
  <Height>65</Height>
  <Depth>2</Depth>
  <Data>Logo Data Goes Here</Data>
  <Prompt>Company Name</Prompt>
</CiscoIPPhoneImage>
<%
' Page 2
elseif pageid = 2 then
refreshtime = 300
Response.AddHeader &quot;Refresh&quot;, refreshtime & &quot;; url=http://&quot; & serverIP & &quot;/cisco/idle/default.asp?pageid=&quot; & newpageid
%>
<CiscoIPPhoneImage>
  <LocationX>-1</LocationX>
  <LocationY>-1</LocationY>
  <Width>130</Width>
  <Height>65</Height>
  <Depth>2</Depth>
  <Data>Logo Data Goes Here</Data>
  <Prompt>Company Name</Prompt>
</CiscoIPPhoneImage>
<%
' Page 3
elseif pageid = 3 then
refreshtime = 300
Response.AddHeader &quot;Refresh&quot;, refreshtime & &quot;; url=http://&quot; & serverIP & &quot;/cisco/idle/default.asp?pageid=&quot; & newpageid

%>
<CiscoIPPhoneImage>
  <LocationX>-1</LocationX>
  <LocationY>-1</LocationY>
  <Width>130</Width>
  <Height>65</Height>
  <Depth>2</Depth>
  <Data>Logo Data Goes Here</Data>
  <Prompt>Company Name</Prompt>
</CiscoIPPhoneImage>
<%
end if
Response.End
Session.Abandon
%>

 

[lavamantis]

Thanks for the tips. I've decided that it's just my imagination. The "burned in image" isn't visible when the phone is off, you can only see it when you go off-hook and the light-grey bars appear in the first two lines of the phone.

When you look at the light-grey bars, they aren't solid but have some variations in the color. The variations appear to be in the shape of our logo, but it's just because they have similar lines.

Anyway, I had developed cycling logos like in AdmanOK's post. I'll keep them now more because it's pretty cool than because it's necessary!