Bidirectional display and triggering thereof

Patent metadata

Field	Value
Publication number	US-9507412-B2
Application number	US-201114122970-A
Country	US
Kind code	B2
Filing date	May 31, 2011
Priority date	May 31, 2011
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

The present invention relates to a bidirectional display having a two-dimensional display array comprising a plurality of light-generating pixels and a two-dimensional camera array comprising a plurality of light-detecting elements, wherein the two arrays can each be electrically triggered line by line and are preferably interleaved in at least in some sections, featuring electrical triggering of the display array and of the camera array wherein, during light generation in a line of the display array, light detection with that line of the camera array which is closest to said line is deactivated, i.e. line-sequential electrical triggering of the bidirectional display.

First claim

The invention claimed is:

1. A bidirectional display, comprising:
a two-dimensional display array comprising a plurality of light-generating picture elements;
a two-dimensional camera array comprising a plurality of light-detecting elements; and
a time-sequential electrical control of the display array and of the camera array;
wherein the display and camera arrays are each electrically controllable row-wise and are arranged nested in one another at least section-wise;
wherein the electrical control of the display array and of the camera array is configured such that;
during a light generation in a row of the display array, a light detection by a row of the camera array next closest thereto is deactivated, and a row-sequential electrical control of the bidirectional display is provided;
during the light generation in a plurality of adjacent rows of the display array, the light detection by rows of the camera array next closest to this plurality of adjacent rows is deactivated; and
a light detection is enabled during a light generation in a row of the display array by a row of the camera array that is not the row of the camera array next closest thereto.

2. The bidirectional display in accordance with claim 1 , wherein the electrical control of the display array and of the camera array is configured such that during exposure of at least a part of the camera array by an external light, and/or during light detection by one row, a plurality of rows, or all rows of the camera array, a light generation and/or an electrical activity is not enabled in any of the rows of the display array.

3. The bidirectional display in accordance with claim 1 , wherein the electrical control of the display array and of the camera array is configured such that during a light generation in any of the rows of the display array, any and all light detection by the camera array is deactivated by a complete time separation of electrical control of the display array and electrical control of the camera array.

4. The bidirectional display in accordance with claim 1 , wherein a specified time interval Δt having a duration of at least 1/10 the time duration Δt KE of light detection by the rows of the camera array lies for at least one row of the display array between an end of a programming and/or writing of data to this at least one row of the display array, on the one hand, and a start of the light detection by one row, a plurality of rows, or all rows of the camera array, on the other hand.

5. The bidirectional display in accordance with claim 1 , wherein light generation in a row of the display array includes one of:
(a) a writing of data to be represented in this row of the display array into this row of the display array and/or programming of this row of the display array, a representation of data in this row of the display array and a deletion of represented data from this row of the display array;
(b) only the writing and/or programming described above in (a), on the one hand, and the representation described above in (a), on the other hand;
(c) only the representation described above in (a) and the deletion described above in (a); or
(d) only the representation described above in (a).

6. The bidirectional display in accordance with claim 1 , wherein light detection in a row of the camera array includes one of:
(a) a switch-on delay up to a start of an integration of light quants emanating from an external light source and incident onto the row of the camera array and a reading out of a corresponding row signal integrated in this manner;
(b) only the switch-on delay described in (a) and the integration described in (a);
(c) only the integration described in (a) and the reading out described in (a); or
(d) only the integration described in (a).

7. The bidirectional display in accordance with claim 1 , configured to provide a plurality of mutually following light generations by individual rows of the display array corresponding to a plurality of display images or frames to be represented, with a light detection by the camera array in accordance with claim 1 configured to occur for each of these light generations.

8. The bidirectional display in accordance with claim 1 , comprising a display array configured for emitting light visible to the human eye; and/or a camera array configured for detecting infrared light.

9. The bidirectional display in accordance with claim 1 ,
wherein the display array includes organic light emitting diodes (OLEDs) as light-generating picture elements;
wherein the camera array includes at least one of photodiodes or phototransistors as light-detecting elements;
wherein the light generating picture elements and/or the light-detecting elements are configured either as separate matrices or as mutually nested matrices or as matrices formed and/or integrated in complementary metal-oxide-semiconductor (CMOS) technology; and/or
wherein the bidirectional display includes a microdisplay having a side length of the light-generating picture elements in a range between 4 μm and 40 μm and/or having a side length of the light-detecting elements in a range between 4 μm and 40 μm.

10. The bidirectional display in accordance with claim 1 , wherein the electrical control of the display array and of the camera array is configured such that a light detection is enabled during a light generation in a row of the display array by a row of the camera array that is furthest therefrom.

11. The bidirectional display in accordance with claim 1 , configured such that both light detection in the individual rows of the camera array and light generation in the individual rows of the display array occur mutually offset in time, with the light detection for all rows of the display array occurring in a respective next closest row of the camera array outside the time interval of the light generation.

12. A bidirectional display, comprising:
a two-dimensional display array comprising a plurality of light-generating picture elements;
a two-dimensional camera array comprising a plurality of light-detecting elements; and
a time-sequential electrical control of the display array and of the camera array;
wherein the display and camera arrays are each electrically controllable row-wise and are arranged nested in one another at least section-wise;
wherein the electrical control of the display array and of the camera array is configured such that;
during a light generation in a row of the display array, a light detection by a row of the camera array next closest thereto is deactivated, and a row-sequential electrical control of the bidirectional display is provided;
during the light generation in a plurality of adjacent rows of the display array, the light detection by rows of the camera array next closest to this plurality of adjacent rows is deactivated; and
during a light detection by one row, a plurality of rows, or all rows of the camera array in a first one or more rows of the display array, a programming of the first one or more rows of the display array and/or a writing of data to be presented in the first one or more rows of the display array is enabled in the first one or more rows of the display array, but not a representation of data in the first one or more rows of the display array.

13. A bidirectional display, comprising:
a two-dimensional display array comprising a plurality of light-generating picture elements;
a two-dimensional camera array comprising a plurality of light-detecting elements; and
a time-sequential electrical control of the display array and of the camera array;
wherein the display and camera arrays are each electrically controllabl

Assignees

• Herold Rigo
• Richter Bernd
• Vogel Uwe
• Fraunhofer Ges Forschung

Inventors

• Herold Rigo
• Richter Bernd
• Vogel Uwe

Classifications

• G02B2027/014

  comprising information/image processing systems · CPC title

• G02B27/017 Primary

  Head mounted · CPC title

• G02B2027/0138

  comprising image capture systems, e.g. camera · CPC title

• H04N13/044

  Electricity · mapped topic

• G02B27/0093

  with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking · CPC title