Datasheet

DLP5500

DLPS013E –APRIL 2010–REVISED SEPTEMBER 2013

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Optically, the DLP5500 consists of 786,432 highly reflective, digitally switchable, micrometer-sized mirrors

(“micromirrors”), organized in a two-dimensional array of 1024 micromirror columns by 768 micromirror rows

(Figure 3). Each aluminum micromirror is approximately 10.8 microns in size (refer to “Micromirror Pitch” in

Figure 3), and is switchable between two discrete angular positions: –12° and +12°. The angular positions are

measured relative to a 0° “flat state”, which is parallel to the array plane (see Figure 4). The tilt direction is

perpendicular to the hinge-axis which is positioned diagonally relative to the overall array. The “On State” landed

position is directed towards “Row 0, Column 0” corner of the device package (refer to “Micromirror Hinge-Axis

Orientation” in Figure 3). In the field of visual displays, the 1024 by 768 “pixel” resolution is referred to as "XGA".

Each individual micromirror is positioned over a corresponding CMOS memory cell. The angular position of a

specific micromirror is determined by the binary state (logic 0 or 1) of the corresponding CMOS memory cell

contents, after the mirror "clocking pulse" is applied. The angular position (–12° or +12°) of the individual

micromirrors changes synchronously with a micromirror “clocking pulse”, rather than being synchronous with the

CMOS memory cell data update. Therefore, writing a logic 1 into a memory cell followed by a mirror reset will

result in the corresponding micromirror switching to a +12° position. Writing a logic 0 into a memory cell followed

by a mirror reset will result in the corresponding micromirror switching to a –12° position.

Operationally, updating the angular position of the micromirror array consists of first updating the contents of the

CMOS memory, followed by application of a Mirror Reset to all or a portion of the micromirror array (depending

upon the configuration of the system). Mirror Reset pulses are generated by the DLPA200, with application of the

pulses being coordinated by the DLPC200 controller.

Around the perimeter of the 1024 by 768 array of micromirrors is a uniform band of “border” micromirrors. The

border micromirrors are not user-addressable. The border micromirrors land in the –12° position once power has

been applied to the device. There are 10 border micromirrors on each side of the 1024 by 768 active array.

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