Eye imaging in head worn computing
Aspects of the present invention relate to methods and systems for imaging, recognizing, and tracking of a user's eye that is wearing a HWC. Aspects further relate to the processing of images reflected from the user's eye and controlling displayed content in accordance therewith.
1. An image source for a head-worn display, comprising:
a digital light processing (DLP) display positioned to reflect on-pixel light in-line with transfer optics adapted to present the on-pixel light to an eye of a user as image light, the DLP display further positioned to reflect off-pixel light in-line with a dark light trap; and
a camera positioned to capture eye-image light originating as a reflection from the eye of the user, wherein, prior to being captured by the camera, the eye-image light reflects off of a plurality of mirrors of the DLP display and then off of a reflective surface positioned to reflect the eye-image light towards the camera.
2. The image source of claim 1 , wherein the eye-image light is reflected off of off-pixel mirrors of the DLP display.
3. The image source of claim 1 , wherein the eye-image light is reflected off of no-power-pixel mirrors of the DLP display.
4. The image source of claim 1 , wherein the reflective surface is a partially reflective and partially transmissive surface.
5. The image source of claim 4 , wherein the reflection and transmission properties are polarization dependent.
6. The image source of claim 1 , wherein the eye-image light is captured by the camera simultaneously with image light being transferred to the eye of the user.
7. The image source of claim 1 , wherein a subset of mirrors of the DLP display are dedicated to reflect eye-image light.