Ambient light detection using an OLED device
AssigneeEastman Kodak Company
InventorsRonald Cok, Felipe Leon
Life of this patent
Estimating the term…
Abstract
An OLED device for the detection of ambient light level, comprising: a) a substrate; b) one or more OLED element(s) formed on the substrate and having a common electrical connection for passing current through the OLED element(s); c) one or more transistor circuit(s) for controlling current passing through the OLED element(s); and d) a controller for measuring a current passing through the common electrical connection when the OLED element(s) and/or transistor circuit(s) are exposed to ambient light, for controlling the transistor circuit(s), and for comparing the current measured to an established current response under pre-determined ambient and OLED conditions to determine ambient light level.
Claims20
An OLED device for the detection of ambient light level, comprising:
- a) a substrate;
- b) one or more OLED element(s) formed on the substrate and having a common electrical connection for passing current through the OLED element(s);
- c) one or more transistor circuit(s) for controlling current passing through the OLED element(s);
- and
- d) a controller for measuring a current passing through the common electrical connection when the OLED element(s) and/or transistor circuit(s) are exposed to ambient light, for controlling the transistor circuit(s), and for comparing the current measured to an established current response under pre-determined ambient and OLED conditions to determine ambient light level.
A method for the detection of ambient light, comprising:
- a) providing an OLED device by forming one or more OLED element(s) on a substrate and one or more transistor circuit(s) for controlling current passing through the OLED element(s), the OLED element(s) having a common electrical connection for passing current through the OLED element(s);
- b) providing a controller for measuring the current passing through the common electrical connection and for controlling the transistor circuit(s);
- c) exposing the OLED element(s) and/or transistor circuit(s) of the OLED device to ambient light, driving the OLED element(s) with a known drive signal, and measuring a current passing through the common electrical connection;
- and
- d) comparing the measured current to an established OLED device current response determined under known ambient and OLED conditions to determine the amount of ambient light incident on the OLED element(s).
Dependencies are inferred from the claim text.