Dialog Semiconductor Gmbh

Dialog Semiconductor (UK) Limited

Frank Kronmuller

Ambreesh Bhattad

Yimin Chen

Achim Stellberger

Hande Kurnaz

Jiandong Zhang

Xiaoyong Zhang

Honglai Wang

Lijie Chen

Paul Zehnich

Helmut Burkhardt

Alper Ucar

A power system and related methods provide sense resistor fault detection and safe operation of switching power converters and connected devices such as portable electronic devices powered by the switching power converter. The power system detects an open circuit or short circuit condition of the sense resistor and controls output current of the switching power converter to ensure safe operating conditions of the power system and connected equipment. The power system can also detect initial inrush current of the connected equipment and detect a duty cycle of the switching power converter to positively detect a short circuit condition of the sense resistor.

Sense resistor fault detection

Secondary controller for a flyback converter including a sense resistor fault detection

A circuit and methods eliminating production related luminance variations of electronic display applies to all display technologies that require gamma adjustment or also adjustment of other display parameters e.g. brightness or contrast as e.g. LCD or OLED display modules are disclosed. This is performed by individual trimming of the display driver's gamma curve One alternative is that an end-user has access to a non-volatile memory and replaces the factory default settings of the gamma curve with individual settings. Another alternative is to load gamma curve parameters from the non-volatile memory to gamma control registers and perform tweaking of the gamma curve from these control registers on top of the factory default settings in the non-volatile memory.

Gamma curve correction for TN and TFT display modules

Growing community of inventors

Nabern, Germany

Frank Kronmuller