DLP9000 datasheet(32/58 Pages) TI2

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DLP9000

DLPS036B – SEPTEMBER 2014 – REVISED OCTOBER 2016

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9.4 Device Functional Modes

9.4.1 DLP9000

The DLP9000 DMD is controlled by two DLPC900 digital controllers. The digital controller operates in two

different modes. The first is video mode where the video source is displayed on the DMD. The second is Pattern

mode, where the patterns are downloaded over USB or pre-stored in flash memory, and then streamed to the

DMD. The resulting DMD pattern rate depends on which mode and bit-depth is selected. For more information,

refer to the DLPC900 data sheet listed under Related Documentation.

9.4.2 DLP9000X

The DLP9000X DMD is controlled by one DLPC910 digital controller. The digital controller offers high speed

streaming mode where 1-bit binary patterns are accepted at the LVDS interface input, and then streamed to the

DMD. To ensure reliable operation, the DLP9000X must always be used with the DLPC910. For more

information, refer to the DLPC910 data sheet listed under Related Documentation.

9.5 Window Characteristics and Optics

NOTE

TI assumes no responsibility for image quality artifacts or DMD failures caused by optical

system operating conditions exceeding limits described previously.

9.5.1 Optical Interface and System Image Quality

TI assumes no responsibility for end-equipment optical performance. Achieving the desired end-equipment

optical performance involves making trade-offs between numerous component and system design parameters.

Optimizing system optical performance and image quality strongly relate to optical system design parameter

trades. Although it is not possible to anticipate every conceivable application, projector image quality and optical

performance is contingent on compliance to the optical system operating conditions described in the following

sections.

9.5.2 Numerical Aperture and Stray Light Control

The angle defined by the numerical aperture of the illumination and projection optics at the DMD optical area

should be the same. This angle should not exceed the nominal device mirror tilt angle unless appropriate

apertures are added in the illumination and/or projection pupils to block out flat-state and stray light from the

projection lens. The mirror tilt angle defines DMD capability to separate the "ON" optical path from any other light

path, including undesirable flat-state specular reflections from the DMD window, DMD border structures, or other

system surfaces near the DMD such as prism or lens surfaces. If the numerical aperture exceeds the mirror tilt

angle, or if the projection numerical aperture angle is more than two degrees larger than the illumination

numerical aperture angle, objectionable artifacts in the display’s border and/or active area could occur.

9.5.3 Pupil Match

TI’s optical and image quality specifications assume that the exit pupil of the illumination optics is nominally

centered within 2° (two degrees) of the entrance pupil of the projection optics. Misalignment of pupils can create

objectionable artifacts in the display’s border and/or active area, which may require additional system apertures

to control, especially if the numerical aperture of the system exceeds the pixel tilt angle.

9.5.4 Illumination Overfill

The active area of the device is surrounded by an aperture on the inside DMD window surface that masks

structures of the DMD device assembly from normal view. The aperture is sized to anticipate several optical

operating conditions. Overfill light illuminating the window aperture can create artifacts from the edge of the

window aperture opening and other surface anomalies that may be visible on the screen. The illumination optical

system should be designed to limit light flux incident anywhere on the window aperture from exceeding

approximately 10% of the average flux level in the active area. Depending on the particular system’s optical

architecture, overfill light may have to be further reduced below the suggested 10% level in order to be

acceptable.

DLP9000 Datasheet(PDF) 32 Page - Texas Instruments

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