Penlight and touch screen data input system and method for flat panel displays
First Claim
1. An emissive pixel device having an integrated luminance and input sensor, the pixel device comprising:
- a light emitting device;
a pixel emitter drive circuit generating a current to drive the light emitting device to a predetermined luminance corresponding to an image voltage and applying the drive current to the light emitting device during a frame time;
at least one photo sensor that exhibits a change in electrical characteristic in response to a change in incident photon flux disposed near the light emitting device to;
(i) intercept a measurable photon flux when the light emitting device is in an emitting state, and (ii) to detect a measurable photon flux from a source outside the pixel when the light emitting device is not in an emitting state;
at lease one of a voltage, current, and charge reading circuit for measuring;
(i) a first voltage across, a first current from, or a first charge generated by the photo sensor device at the end of a first portion of a non-emitting time period during a non-light emitting state, and wherein the measured first voltage, first current, or first charge being in indication of a measured luminance emitted from a source outside the pixel during the first portion of the time period; and
(ii) a second voltage across, a second current from, or a second charge generated by the photo sensor device at the end of a second portion of an emitting time period during the light emitting state, and wherein the measured second voltage, second current, or second charge being an indication of a measured luminance emitted from the pixel during a second portion of the time period.
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Accused Products
Abstract
System, device, and method for receiving or sensing touch or light input to an emissive display such as to a OLED display using the same or different sensors as are used to sense and maintain a pixel luminance. Penlight and touch screen data input system and method for display. A sidelight illuminated display and touch panel input device. Method and device for reading display pixel emission and ambient luminance levels. Emissive display having sensing for luminance stabilization and user light or touch screen input. Method and device for emissive display using shielded or partially shielded sensors. Emissive pixel display device characterized in that photon sensors are disposed within pixels and operated to sense photons emitted by emitter within pixel and ambient photons emitted by sources outside pixel, sensed internally emitted photons being for luminance feedback control and sensed ambient photons being used to detect external light source or sources.
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Citations
18 Claims
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1. An emissive pixel device having an integrated luminance and input sensor, the pixel device comprising:
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a light emitting device; a pixel emitter drive circuit generating a current to drive the light emitting device to a predetermined luminance corresponding to an image voltage and applying the drive current to the light emitting device during a frame time; at least one photo sensor that exhibits a change in electrical characteristic in response to a change in incident photon flux disposed near the light emitting device to;
(i) intercept a measurable photon flux when the light emitting device is in an emitting state, and (ii) to detect a measurable photon flux from a source outside the pixel when the light emitting device is not in an emitting state;at lease one of a voltage, current, and charge reading circuit for measuring; (i) a first voltage across, a first current from, or a first charge generated by the photo sensor device at the end of a first portion of a non-emitting time period during a non-light emitting state, and wherein the measured first voltage, first current, or first charge being in indication of a measured luminance emitted from a source outside the pixel during the first portion of the time period; and (ii) a second voltage across, a second current from, or a second charge generated by the photo sensor device at the end of a second portion of an emitting time period during the light emitting state, and wherein the measured second voltage, second current, or second charge being an indication of a measured luminance emitted from the pixel during a second portion of the time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of operating an emissive pixel device having an integrated luminance and input sensor, the method comprising:
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generating a current to drive a light emitting device in each pixel to a predetermined luminance corresponding to an image voltage and applying the drive current to the light emitting device during the frame time; providing a least one photo sensor that exhibits a change in electrical characteristic in response to a change in incident photon flux near the light emitting device in each pixel to;
(i) intercept a measurable photon flux when the light emitting device is in an emitting state, and (ii) to detect a measurable photon flux from a source outside the pixel when the light emitting device is not in an emitting state;reading at least one of a voltage, current, and charge measurement representing; (i) a first voltage across, a first current from, or a first charge generated by the photo sensor device at the end of a first portion of a non-emitting time period during the non-light emitting state, and wherein the measured first voltage, first current, or first charge being an indication of a measured luminance emitted from a source outside the pixel during the first portion of the time period; and (ii) a second voltage across, a second current from, or a second charge generated by the photo sensor device at the end of a second portion of an emitting time period during the light emitting state, and wherein the measured second voltage, second current, or second charge being an indication of a measured luminance emitted from the pixel during a second portion of the time period.
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Specification