DLPU048E August 2016 – July 2024
Some DMDs, such as the DLP5530S-Q1 and the DLP4620S-Q1, have a diamond mirror configuration. These type of DMDs allow the light to enter directly from the bottom of the DMD optically, which can result in smaller and more efficient optical design. Refer to Figure 5-1 as an example.
The diamond mirror configuration enables Quincunx processing which can represent a higher effective resolution than the total number of mirrors. Specifically, the horizontal and vertical representation of data can represent twice as much resolution as the number mirrors. In this fully maximized mode, the diagonal information is sacrificed, however due to the limitations of the human visual system, the reduced resolution in the diagonal is less observable by the typical viewer. Quincunx processing is widely used in consumer electronics to maximize resolution for the fewest number of physical pixels, including smart phones for example.
Different processing modes supported by the DLPC23x-Q1 when combined with the DMD with diamond configuration can be seen in Table 5-1.
Mode | Input source description | Operations performed by DLPC23x-Q1 and DMD |
---|---|---|
Quincunx pre-processed data Refer to Figure 5-2 for an example on converting source data from a manhattan configuration to a diamond configuration |
Host MCU performs Quincunx processing Example: source data is converted from 1920 x 960 manhattan into 960 x 960 diamond |
Data is passed through to display on the DMD without further processing |
DLPC23x-Q1 performs Quincunx processing (possible when the internally scaled image is less than 1.5Mbits) Refer to Figure 5-3 for an example on having a higher resolution Manhattan configuration |
Example: 1358 x 566 manhattan input source data |
DLPC23x-Q1 scales data up to 1920 x 800 and applies a diamond bandpass filter to remove high frequency diagonal content, then the DLP4620S-Q1 deciminates every other pixel where the number of physical mirrors used for display is 960 x 800 |
Lower resolution Manhattan input that must be scaled up to be displayed on the DMD Refer to Figure 5-4 for an example pertaining to a Manhattan source configuration with resolution lower than the DMD |
Example: 960 x 480 input to be display on 960 x 960 diamond DMD |
DLPC23x-Q1 scales data up to 960 x 960 where the DMD displays the scaled information |
Contact TI (E2E) for further explanation of the benefits of Quincunx processing to increase resolution.