Can I change the viewing angle of an LCD display?
mike
They all look good from above, but when viewed from
below, the display looks blank.
I want to be able to view it from bed when it's on the night
stand.
If memory serves, the contrast input on an LCD display
changes the viewing angle.
I've not taken 'em apart, but I fully expect to find
a glob of epoxy covering an unpackaged clock chip and not
much else.
Yes, I could build a weighted wedge to make the display
face down slightly, but I'd rather just fix the display.
Ideas?
Thanks, mike
Jan Panteltje
<spa...@go.com> wrote in <i627ag$qm4$1...@news.eternal-september.org>:
>I have a bunch of battery-operated digital clocks with LCD displays.
>They all look good from above, but when viewed from
>below, the display looks blank.
>
>I want to be able to view it from bed when it's on the night
>stand.
Camera on LCD + monitor above bed.
Mirrors also help.
WHy not just tilt it?
Dennis
"Jan Panteltje" <pNaonSt...@yahoo.com> wrote in message
news:i62j6c$o33$1...@news.albasani.net...
and read it in the existing mirror mounted on the ceiling.
whit3rd
> I have a bunch of battery-operated digital clocks with LCD displays.
> They all look good from above, but when viewed from
> below, the display looks blank.
You can apply a Fresnel prism; those full-page magnifier sheets
are, at the edges, suitable for bending the light so your preferred
location can enjoy better contrast.
Robert Roland
>I have a bunch of battery-operated digital clocks with LCD displays.
>They all look good from above, but when viewed from
>below, the display looks blank.
Some graphical LCDs can be configured for either viewing angle. You
set a configuration parameter in the controller, and it turns the
image upside-down.
If your LCDs are simple 7-segment ones, it is only a matter of
swapping the segment connections around so it displays an upside-down
image.
--
RoRo
k...@att.bizzzzzzzzzzzz
He's not talking about inverting the characters, rather changing the viewing
angle. LCDs have a limited viewing angle for maximum contrast which is often
quite limited (for any contrast). Often this angle can be set with a bias
voltage, though sometimes this note isn't accessible or is software
controllable.
Grant
Yes, LCD module samples I'm buying recently are 6 O'clock viewing, and,
they have preset LCD voltage string drive, so no adjustment (4 line by 20
char models).
Other simple ones (say 2 line by 16 chars) do have the adjustment and may
change viewing angle enough, long time since I power ed on up.
I'm not sure one can turn them the other way because there's not enough
custom char gen memory for the full set of characters. OTOH a dot matrix
display can go either way because you control char gen in driver, only
tell which dots to turn on/off.
7-segment LCDs could be turned around, and rewire the segment drive,
providing they're not CoG (Chip on Glass) models. They don't have
contrast adjustment as they're (usually) not multiplexed backplane.
Grant.
m II
> and read it in the existing mirror mounted on the ceiling.
>
>
.krow ton did tI .ecno taht deirt I
mike
Glenn Gundlach
Gerhard
"Grant" <o...@grrr.id.au> wrote in message
news:qj2b86tle23j7rkk4...@4ax.com...
I have an Panasonic digital camara (think model is MZ-7) ?
The LCD display (on the back) has an overhead shooting mode.
In this mode the LCD is still visible when one holds the camera
above your head (and slightly to the front) to shoot over the crowd.
(about 60 degrees up is probably the optimal angle).
If in this mode the display isn't realy useable when viewed straight on.
I don't know how they do it but it works.
Gerhard van den Berg
Jan Panteltje
<o...@grrr.id.au> wrote in <qj2b86tle23j7rkk4...@4ax.com>:
>Yes, LCD module samples I'm buying recently are 6 O'clock viewing, and,
>they have preset LCD voltage string drive, so no adjustment (4 line by 20
>char models).
>
>Other simple ones (say 2 line by 16 chars) do have the adjustment and may
>change viewing angle enough, long time since I power ed on up.
>
>I'm not sure one can turn them the other way because there's not enough
>custom char gen memory for the full set of characters. OTOH a dot matrix
>display can go either way because you control char gen in driver, only
>tell which dots to turn on/off.
>
>7-segment LCDs could be turned around, and rewire the segment drive,
>providing they're not CoG (Chip on Glass) models. They don't have
>contrast adjustment as they're (usually) not multiplexed backplane.
>
>Grant.
Future *may* be OLEDs.
But I have a 30 year old radio-alarm clock with a clock display
that uses some heater in vacuum and fluorescent segments, like an analog scope screen.
30 years is not bad lifetime for that thing, it is still very bright,
so much I added photo transistor to automatically reduce brightness in the dark.
Cannot remember what those displays are called, those used to be in video recorders too.
Ah, I remember: Vacuum fluorescent display
http://en.wikipedia.org/wiki/Vacuum_fluorescent_display
A realy nice technology.
Rich Grise
Thanks,
Rich
k...@att.bizzzzzzzzzzzz
If you can't read it, it doesn't matter. ;-)
Charlie E.
wrote:
>On Mon, 06 Sep 2010 19:13:52 -0600, m II wrote:
That drove me crazy until I realized you misspelled "ECNALUBMA"
Charlie
hamilton
Rich Grise
> On Wed, 08 Sep 2010 10:48:30 -0700, Rich Grise <rich...@example.net>
>>> Dennis wrote:
>>>
>>>> and read it in the existing mirror mounted on the ceiling.
>>>
>>> .krow ton did tI .ecno taht deirt I
>>>
>>And what the heck is an "ECNALUMBA?" ;-)
>
>
Thanks,
Rich