Filter
Top Products
Page 18
High Pixel Density
All other things being equal, smaller microdisplay panels are better than
larger. Smaller panels not only mean lower manufacturing costs for the
microdisplays themselves. They also mean smaller size and lower cost for the
optical engine and for the projection lens that focuses the picture onto the screen.
For this reason, the "pixel density" of a microdisplay is of enormous
practical importance. Higher pixel density is the key to delivering high
performance at reasonable prices. While it is possible to measure the density as
pixels per square inch or square millimeter, the more common measure is "pixel
pitch." This measures the center-to-center distance of adjacent pixels, taking into
account not only the size of the pixel itself but also the gap between the pixels.
Sony's 4K SXRD panel has a pixel pitch of just 8.5 micrometers. In comparison,
a human hair is roughly 70 micrometers thick. It is this 8.5-micrometer pitch that
enables Sony to deliver 8.8 Megapixels on a device not much bigger than a
competing panel that delivers just 2.2 Megapixels.
To achieve maximum resolution at minimum cost, microdisplay panel
suppliers are pushing toward higher pixel density. Sony SXRD panels
have the highest pixel density currently available.
High aperture ratio
On all fixed-pixel panels, the pixels are separated by gaps that contain no
picture information. To generate the effect of a seamless, continuous picture,
these gaps should be minimized. In the SXRD panel design, all the transistors
4M
500K
1M
2M
3M
PIXELS
0.5
1.0 2.0 3.00.9 1.3
0.7
PANEL SIZE
(
inches dia
g
onal
)
8M
7 μm
pitch
13 μm
pitch
15 μm
pitch
0.6
0.8
1.6
0.78" SXRD
HD Panel
1.26" 2K
Competing
Panel
◆
╋
11 μm
pitch
1.55" SXRD
4K Panel
0.61" SXRD
HD Panel
9 μm
pitch
╋
Pixel Density
╋