5.10 Micromirror Array Physical Characteristics

PARAMETER DESCRIPTION

VALUE

UNIT

M

Number of active columns (1) (2)

1360

micromirrors

N

Number of active rows (1) (2)

1536

micromirrors

Ɛ

Micromirror pitch, diagonal(1)

4.525

µm

P

Micromirror pitch, vertical and horizontal (1)

6.4

µm

Micromirror active array width (1)

(P × M) + (P / 2)

8.7072

mm

Micromirror active array height (1)

(P × N) / 2 + (P / 2)

4.9184

mm

Micromirror active border (3)

Pond of micromirror (POM)

15

micromirrors/side

(1)

See Figure 5-16.

(2)

The fast switching speed of the DMD micromirrors combined with advanced DLP image processing algorithms enables each

micromirror to display four distinct pixels on the screen during every frame, resulting in a full 3840 x 2160 pixel image being displayed.

(3)

The structure and qualities of the border around the active array include a band of partially functional micromirrors referred to as the

Pond of Micromirrors (POM). These micromirrors are structurally and/or electrically prevented from tilting toward the bright or ON state

but still require an electrical bias to tilt toward the OFF state.

Incoming Illumination

Light Path

Row 1

Row 2

Row 3

Row N-4

Row N-3

Row N-2

Row N-1

Row N-6

Row N-5

Row N-8

Row N-7

Row 0

Row 4

Row 5

Row 6

Row 7

DMD Active Mirror Array

On-State

Tilt Direction

Off-State

Tilt Direction

Array Width

P (um)

Off State

Light Path

Figure 5-16. Micromirror Array Physical Characteristics

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DLP391TP

DLPS289A – JUNE 2025 – REVISED SEPTEMBER 2025

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