<s>
The	O
Sony	B-Device
Glasstron	I-Device
was	O
a	O
family	O
of	O
portable	O
head-mounted	B-General_Concept
displays	I-General_Concept
,	O
first	O
released	O
in	O
1996	O
with	O
the	O
model	O
PLM-50	O
.	O
</s>
<s>
The	O
products	O
included	O
two	O
LCD	B-Device
screens	I-Device
and	O
two	O
earphones	O
for	O
video	O
and	O
audio	O
respectively	O
.	O
</s>
<s>
The	O
Glasstron	B-Device
was	O
not	O
the	O
first	O
head-mounted	B-General_Concept
display	I-General_Concept
by	O
Sony	O
,	O
with	O
the	O
Visortron	O
being	O
a	O
previous	O
exhibited	O
unit	O
.	O
</s>
<s>
The	O
Sony	O
HMZ-T1	O
,	O
HMZ-T2	O
,	O
HMZ-T3	O
,	O
PlayStation	B-Device
VR	I-Device
and	O
PlayStation	B-Device
VR	I-Device
2	O
can	O
be	O
considered	O
successors	O
to	O
Glasstron	B-Device
.	O
</s>
<s>
The	O
head-mounted	B-General_Concept
display	I-General_Concept
developed	O
for	O
Sony	O
during	O
the	O
mid-1990s	O
by	O
Virtual	O
i-o	O
is	O
completely	O
unrelated	O
to	O
the	O
Glasstron	B-Device
.	O
</s>
<s>
One	O
application	O
of	O
this	O
technology	O
was	O
in	O
the	O
game	O
MechWarrior	B-Application
2	I-Application
,	O
which	O
permitted	O
users	O
to	O
adopt	O
a	O
visual	O
perspective	O
from	O
inside	O
the	O
cockpit	O
of	O
the	O
craft	O
,	O
using	O
their	O
own	O
eyes	O
as	O
visual	O
and	O
seeing	O
the	O
battlefield	O
through	O
their	O
craft	O
's	O
own	O
cockpit	O
.	O
</s>
<s>
Supported	O
video	O
inputs	O
included	O
PC	O
(	O
15	O
pin	O
,	O
VGA	B-Protocol
interface	O
)	O
,	O
Composite	O
and	O
S-Video	O
.	O
</s>
<s>
PLM-S700	O
/	O
PLM-S700E	O
1998	O
The	O
S700	O
allowed	O
for	O
see	O
through	O
mode	O
using	O
LCD	B-Device
shutters	O
and	O
had	O
support	O
for	O
SVGA	O
output	O
.	O
</s>
<s>
Its	O
LCD	B-Device
had	O
over	O
1.55	O
million	O
pixels	O
on	O
a	O
component	O
the	O
size	O
of	O
a	O
ten-cent	O
coin	O
at	O
SVGA	O
(	O
800×600	O
)	O
display	O
resolution	O
.	O
</s>
