Thread Subject: Re: Hardware Labels/LCDWindows

From: Tom Brett
Date: Mon, Jun 18 2007 1:50 PM

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Gregg wrote: I wonder if this should be in the GENERAL TECHNICAL
REQUIREMENT section ??



It would probably be a good idea to include this in the General Technical
Requirement section.the CAPTEL telephones and other telecommunication
devices use LCD windows to display text.



Tom Brett



_____

From: = EMAIL ADDRESS REMOVED =
[mailto: = EMAIL ADDRESS REMOVED = ] On Behalf Of Gregg
Vanderheiden
Sent: Friday, June 15, 2007 10:46 PM
To: 'TEITAC Web/Software Subcommittee'; = EMAIL ADDRESS REMOVED =
Subject: Re: [teitac-hardware] [teitac-websoftware] Hardware
Labels/LCDWindows



Looks good.



The Contrast in SoftwareWeb group (Web) is similar and harmonized with
WCAG. The new text there is:


Text <http://www.w3.org/TR/2007/WD-WCAG20-20070517/#textdef> (and images of
text) have a contrast
<http://www.w3.org/TR/2007/WD-WCAG20-20070517/#contrast-ratiodef> ratio of
at least 5:1, except if the text is pure decoration
<http://www.w3.org/TR/2007/WD-WCAG20-20070517/#puredecdef> . Larger-scale
<http://www.w3.org/TR/2007/WD-WCAG20-20070517/#larger-scaledef> text or
images of text can have a contrast ratio of 3:1.










Do we want to use the same wording? (that one is limited to text since
contrast will vary all over the place for pictures. )



Another thing occurs to me. The contrast of the text on the screen would
be a function of hardware and software. This would need to cover both the
simple B/W displays and the increasingly more common graphic and color
displays. Even the B/W displays are using grayscale. I wonder if this
should be in the GENERAL TECHNICAL REQUIREMENT section ??



And another - don't we need a contrast for labels too (not just displayed
info)?

Again use same?




Gregg
-- ------------------------------
Gregg C Vanderheiden Ph.D.






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From: = EMAIL ADDRESS REMOVED =
[mailto: = EMAIL ADDRESS REMOVED = ] On Behalf Of Jim Tobias
Sent: Friday, June 15, 2007 1:33 PM
To: 'TEITAC Web/Software Subcommittee'; = EMAIL ADDRESS REMOVED =
Subject: Re: [teitac-websoftware] Hardware Labels/LCD Windows

For those not on the call, this issue came up regarding small LCDs on
copiers, printers, etc., used to inform the user about machine status,
collating options, etc. They are typically monochrome backlit LCDs.



First, any provision for this would require a new subsection in the Hardware
section; I propose "2.4 If the product has visual output". Second, here is
some language for a provision:

"All electronic visual displays must have a contrast ratio of at least N:1,
as a default or as adjusted by the user."



Note that "N:1" is the placeholder in the software/web/content provisions.







***
Jim Tobias
Inclusive Technologies
+1.732.441.0831 v/tty
+1.908.907.2387 mobile
skype jimtobias






_____


From: Tom Brett [mailto: = EMAIL ADDRESS REMOVED = ]
Sent: Friday, June 15, 2007 1:53 PM
To: = EMAIL ADDRESS REMOVED = ; TEITAC Web/Software Subcommittee
Subject: [teitac-websoftware] Hardware Labels/LCD Windows

During today's Hardware teleconference I brought up that for many low vision
users the ability to read the prompts, operation touch controls for features
like number of copies, simplex/duplex, and collating, and warning messages
is very difficult because the characters are small and they lack contrast
and brightness.



As part of the discussion it was asked if there should be a provision in
Section 508 to address the LCD window that used to display information or
feature controls. Another question was raised regarding which subcommittee
had jurisdiction of this provision-Hardware or Web/Software.



I would propose that language be crafted that provides a minimum level of
contrast and brightness so that people with low vision would be able to
utilize products with this type of display effectively.







Tom Brett

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