OLED display with composite photosensor
AssigneeEastman Kodak Company
InventorRonald S. Cok
Life of this patent
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Abstract
An OLED display and photo-sensor is described, comprising: a substrate; a composite light sensor made up of a plurality of individual thin-film light sensitive elements located over the substrate and connected in parallel to provide a common signal; a first transparent electrode located over the composite light sensor; one or more organic layers comprising an OLED located on the transparent electrode and emitting light through the transparent electrode and to the composite light sensor; and a second electrode located on the one or more organic layers comprising an OLED. The OLED display device provides a means to measure the light output of the OLED display device while maximizing the light output and is useful in measuring incident ambient illumination.
Claims25
An OLED display and photo-sensor, comprising:
- a) a substrate;
- b) a composite light sensor made up of a plurality of individual thin-film light sensitive elements located over the substrate and connected in parallel with electrical connections to provide a common signal:
- C) a first transparent electrode located over the composite light sensor;
- d) one or more organic layers comprising an OLED located on the transparent electrode and emitting light through the transparent electrode and to the composite light sensor;
- and
- e) a second transparent electrode located on the one or more organic layers comprising an OLED, wherein the OLED display is a top-emitter OLED display.
An OLED display and photo-sensor, comprising:
- a) a substrate;
- b) a composite light sensor made up of a plurality of individual thin-film light sensitive elements located over the substrate and connected in parallel with electrical connections to provide a common signal;
- C) a first transparent electrode located over the composite light sensor;
- d) one or more organic layers comprising an OLED located on the transparent electrode and emitting light through the transparent electrode and to the composite light sensor;
- and
- e) a second electrode located on the one or more organic layers comprising an OLED;
- f) a reflective layer located over the second electrode, wherein the OLED display is a bottom-emitter OLED display.
A method of calibrating the composite light sensor of an OLED display and photo-sensor, comprising the steps of:
- a) providing the OLED display and photo-sensor, including:
- i) a substrate;
- ii) a composite light sensor made up of a plurality of individual thin-film light sensitive elements located over the substrate and connected in parallel with electrical connections to provide a common signal:
- iii) a first transparent electrode located over the composite light sensor;
- iv) one or more organic layers comprising an OLED located on the transparent electrode and emitting light through the transparent electrode and to the composite light sensor;
- v) a second electrode located on the one or more organic layers;
- b) turning off the OLED;
- c) exposing the composite light sensor to a known incident illumination;
- d) sensing and measuring the ambient light incident on the composite light sensor;
- and
- e) storing the measured response of the composite light sensor comprising an OLED.
Dependencies are inferred from the claim text.