Ignis Innovation Inc.

Shuenn-Jiun Tang

Junhu He

Jafar Talebzadeh

Arash Moradi

Hongxin Liu

Nino Zahirovic

Tong Liu

Gabriel Franklin Yano De Sousa

Qing Jiang

Active Matrix Organic Light Emitting Diode (AMOLED) displays, novel pixel circuits therefor, and methods of programming the pixel circuit and measuring the current of the pixel circuit and OLED thereof are disclosed. One pixel circuit includes four TFT transistors, a storage capacitor and an OLED device and is programmed with use of voltage supplied through a data line. One method measures currents of the OLED and the pixel circuit through the data line by a readout circuit.

Display, pixel circuit, and method

Pixel circuit, display, and method

What is disclosed are systems and methods for compensating for display OLED degradation. Correction factors k for OLED degradation of each sub-pixel is modelled and tracked based on grey level, temperature, and time, and used to correct image data provided to an OLED display.

Compensation systems and methods for OLED display degradation

A pixel circuit for an active matrix organic light emitting diode (AMOLED) and other active matrix displays is disclosed. The pixel circuit is programmed by the voltage supplied through a data line. An electrical current through a light emitting device for a known LED voltage and a pixel current for a pixel programed with a known data signal can be measured by a readout circuit through the data line. A 7T1C implementation enables to pre-charge the drive transistor to a reference voltage in each drive cycle, and to pre-set the light emitting device to a reference voltage prior to emission in each cycle.

Active-Matrix Organic Light-Emitting Diode (AMOLED) displays exhibit differences in luminance on a pixel to pixel basis, primarily as a result of process or construction inequalities, or from aging caused by operational use over time. To facilitate image correction, the initial non-uniformity correction data is obtained using methods, such as electrical measurement or a combination of electrical and optical measurement. Typically, the correction data is then stored on a non-volatile-memory chip on the display module itself. The proposed invention offers an alternate method for storing and loading the image correction data, thereby eliminating the need for memory chip in the display module.

System and method for loading image correction data for displays

Compensation systems and methods for display OLED degradation

Display systems including novel Active Matrix Organic Light Emitting Diode (AMOLED) displays with controllable pixel-driver connections and the measuring of pixel voltage or current while controlling the controllable pixel-driver connections are disclosed. A single driver node is connected to a first node of a pixel, while a second connection from the single driver node to a second node of the pixel is disconnected using at least one peripheral controllable switch.

Display system with controllable connection

A pixel circuit for an active matrix organic light emitting diode (AMOLED) and other active matrix displays is disclosed. The pixel circuit is programmed by the voltage supplied through a data line. An electrical current through a light emitting device for a known LED voltage and a pixel current for a pixel programmed with a known data signal can be measured by a readout circuit through the data line. A 7T1C implementation enables to pre-charge the drive transistor to a reference voltage in each drive cycle, and to pre-set the light emitting device to a reference voltage prior to emission in each cycle.

Growing community of inventors

Guelph, Canada

Shuenn-Jiun Tang