Abstract: This present invention describes a new digital drive concept for flat panel displays where an all-digital drive is used to write data to pixels, which establish the gray scale for each pixel. In addition the invention integrates the all-digital drive with an optical sensor feedback circuit in the pixel without having to add an extra data line for the pixel sensor. Also discussed is a novel unique pulse timing system, where the positioning of the pulse in time has 12 bit accuracy using 8 bit gray scale data and a phase delay system (delay locked loop, DLL).

Abstract: The present invention uses an interrupted loop feedback technique to control emissive pixels of a printhead of a printer. The interrupted loop technique involves varying the input voltage to the organic light emitting diode (OLED) of the pixel until the pixel emits the desired intensity of light. The input voltage value is locked when the pixel emits the desired intensity of light. The present invention also uses a page wide array of OLED to simultaneously emit image data for printing an image on a paper.

Abstract: The present invention provides techniques to calibrate the emissive pixels used in printers and displays. The emissive pixels are arranged in a linear array or in a two dimensional array. For the transparent substrate on which the emissive pixels are formed, the light emitted by a pixel is measured by attaching one or more optical sensors, either directly or via optical fibers, to the transparent surfaces of the transparent substrate. That measurement is compared to a reference value and corrections are accordingly made to the emissive pixels. In case of a printer, the emissive pixels can be tested for their luminescent strengths in the period following the printing of a page while the next page to be printed is being positioned.

Abstract: The present invention discloses novel top emitter pixel circuitry for flat panel displays. Sensor material is deposited above a substrate. A pixilated opaque cathode is deposited above the sensor material. Organic light emitting diode material is deposited above the cathode. A transparent anode is deposited above the OLED material. Some of the layers have dielectric layers between them. The light emitted by the OLED material passes upwards through the transparent anode but cannot pass downwards through the opaque cathode. A deep via optically connects the OLED material layer with the sensor material layer. A transparent cathode can be used instead of the opaque cathode, thereby allowing the light generated by the OLED material layer to pass both upward through the transparent anode and downward through the transparent cathode. That would eliminate the need for a deep via to form an optical path between the OLED material layer and the sensor layer.

Abstract: The present invention provides techniques for emissive pixels of flat panel displays. Specifically, pixel feedback and a combination of voltage modulation and pulse width modulation are used to improve the quality and consistency of aging pixels. Based on feedback, an image frame is divided into sub-frames of various time periods. Also based on feedback, a voltage, or voltages of different voltage levels, is (are) applied to the selected sub-frames to generate an image frame of a particular gray level. The human eye integrates the effects of the voltage and pulse width modulation techniques that are applied to the various sub-frames of the image frame, over the duration of the image frame.

Abstract: The present invention discloses an OLED display having a first row of light emitting diodes and a second row of light emitting diodes. A first sensor circuit is coupled to a light emitting diode of the first linear array for detecting an output of the light emitting diode of the first linear array. A second sensor circuit is coupled to a light emitting diode of the second linear array for detecting an output of the light emitting diode of the second linear array. A control circuit simultaneously causes the light emitting diode of the first linear array to emit light and the sensor circuit coupled to the light emitting diode of the second linear array to provide information corresponding to the detected output of the light emitting diode of the second linear array to a sensor reader circuit.

Abstract: The embodiments of the present invention provide a flat panel display having a plurality of pixels, each comprising a light-emitting device configured to emit light in accordance with a current flowing through the light-emitting device, a transistor coupled to the light-emitting device and configured to provide the current through the light-emitting device, the current increasing with a ramp voltage applied to a control terminal of the transistor, and a switching device configured to switch off in response to the luminance of the light-emitting device having reached a specified level, thereby disconnecting the ramp voltage from the transistor and locking the brightness at the specified level. The ramp voltage is generated in each pixel instead of in peripheral circuits, thereby reducing the number of conducting lines in the display.

Abstract: The embodiments of the present invention provide a color filter integrated with a sensor array and methods of fabricating the same. By integrating the sensor array with the color filter, the overall cost of the display is reduced. Moreover, the integration allows the sensor array to be used like a touch screen for data input. As a further benefit, the integration allows the color filter to serve as a light shield thus eliminating the need for a separate light shield for the sensor array.

Abstract: The embodiments of the present invention provide a flat panel display having a plurality of pixels, each comprising a light-emitting device configured to emit light in accordance with a current flowing through the light-emitting device, a transistor coupled to the light-emitting device and configured to provide the current through the light-emitting device, the current increasing with a ramp voltage applied to a control terminal of the transistor, and a switching device configured to switch off in response to the luminance of the light-emitting device having reached a specified level, thereby disconnecting the ramp voltage from the transistor and locking the brightness at the specified level. The switching device is further configured to stay off thereby allowing the luminance of the light-emitting device to be kept at the specified level until the pixel is rewritten in a different frame.

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.

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.

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.

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.

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.