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High-Resolution
4.11M-Pixel Diagonal 6.75 mm (Type 1/2.7) Color
CCD for Consumer Digital Still Cameras Supports
30 frames/s VGA Moving Picture Imaging
ICX488DQ/DQF
The desires for higher resolution
and further miniaturization are growing along
with the increasingly widespread use of consumer
digital still cameras. To respond to these desires,
Sony has now developed a new 4.11M-pixel diagonal
6.75 mm (Type 1/2.7) interlaced CCD, the ICX488DQ/
DQF. The ICX488DQ/DQF achieves both higher resolution
and miniaturization by achieving the industry's
smallest pixel size of 2.35 µm. Sony's
unique horizontal and vertical pixel addition
technology allows the ICX488DQ/DQF to provide
both 4M-pixel class still picture and VGA moving
picture imaging at 30 frames/s. |
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ICX488DQ/DQF |
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*ICX488DQ: Primary
color filters, 24-pin DIP ICX488DQF: Primary
color filters, 24- pin SOP
*Diagonal 6.75 mm (Type 1/2.7) optical size
and 4.11M effective pixels (2344H x 1752V)
* The industry's smallest pixel size (2.35 µm
unit pixel)
* 3-field readout method
* Supports 30 frames/s VGA moving picture imaging |
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The ICX488DQ/DQF is
a diagonal 6.75 mm (Type 1/2.7) 4.11M-effective
pixel CCD image sensor developed for use in
high-resolution consumer digital still cameras.
Used with a mechanical shutter, the ICX488DQ/DQF
provides high-resolution image capture. Table
1 presents the pixel structure used in the ICX488DQ/DQF,
and table 2 presents its imaging characteristics. |
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The Industry's
Smallest Pixel Size |
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Figure 1 presents
Sony's consumer digital still camera CCD lineup.
Although the ICX488DQ/DQF corresponds to an
increased pixel count version of Sony's earlier
Type 1/2.7 3.24M-pixel ICX432DQ/DQF, Sony has
developed the industry's smallest pixel (with
a unit pixel size of 2.35 µm) by adopting
the latest fine fabrication technologies, and
thus succeeds in achieving both higher resolution
and miniaturization at the same time. This allows
the implementation of a 4M-pixel digital still
camera from a design using the ICX432DQ/DQF
without changing the optical system. |
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High Saturation
Signal |
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To increase the dynamic
range, the ICX488DQ/DQF adopts the same 3-field
readout system used in the ICX432DQ/DQF. This
readout mode allows finer design rules to be
used in the vertical transfer block, which in
turn allows the photodiode block to be made
larger. The ICX488DQ/DQF achieves a saturation
signal of 385 mV despite miniaturization to
a 2.35 µm unit
pixel size. (See table 2.) |
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VGA Moving
Picture Imaging at 30 frames/s |
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Since the ICX488DQ/DQF
adopts Sony's unique horizontal and vertical
pixel addition technology, it can add together
4 pixels internally to the CCD itself and thus
achieve a four times higher imaging sensitivity.
In the 4/6-line readout mode (with horizontal
addition), the ICX488DQ/DQF achieves both 30
frames/s high-speed imaging at high resolution
(VGA: 640 x 480 pixels). Thus the ICX488DQ/DQF
achieves both high pixel count still picture
and high-quality moving picture. It also features
an extensive set of readout modes, including
2/6-line readout mode that allows high-speed
shutter operation, and partial scan modes designed
for even higher speed AF control. |
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System IC |
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Sony also
provides the CXD3629GA driver timing generator
IC that includes built-in horizontal and vertical
drivers. In addition to a VGA equivalent moving
picture mode, this IC also supports high frame
rate readout mode and AF mode as well. |
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•••• Mr.KIMURA ••••
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We developed this
4M-pixel Type 1/2.7 CCD that achieves both a
high pixel count still picture and high-quality
moving picture at the same time, and also achieves
further miniaturization. To respond to market
needs for miniaturization and higher pixel counts,
we took maximum advantage of Sony's fine fabrication
technologies and achieved the industry's smallest
pixel size. I strongly recommend that you consider
developing new products based on this device,
which combines both the latest technologies
and functions. |
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See
all articles with figures and tables.  |
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Vol.36 |
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