Osram Opto Semiconductors Gmbh

Marcel Severin

Daniel Richter

Alireza Safaee

Sven Weber-Rabsilber

A control method includes A) determining intrinsic activation times of individual semiconductor emitters of a display device. The display device includes a plurality of light-emitting semiconductor emitters with different intrinsic activation times. The method also includes B) determining and storing in each case an activation delay and/or a turn-on current change for each individual one of the semiconductor emitters. The method further includes C) energizing the individual semiconductor emitters according to the previously determined activation delay and/or turn-on current change, so that in a display mode of the display device the semiconductor emitters have equally long starting times for a light emission.

Control method for a display apparatus and display apparatus

A method for operating a visual display apparatus is specified. The apparatus comprises a first optoelectronic semiconductor component configured to emit electromagnetic radiation of a first wavelength and comprising a first intrinsic switch-on delay. The apparatus comprises a second optoelectronic semiconductor component configured to emit electromagnetic radiation of a second wavelength and comprising a second intrinsic switch-on delay. The second wavelength is different from the first wavelength. The first semiconductor component is operated with a first operating current according to a first actuation signal. The second semiconductor component is operated with a second operating current according to a second actuation signal. The first and/or the second actuation signal comprise a delay clock signal selected such that emissions of electromagnetic radiation from the first and second semiconductor components comprise a switch-on delay with respect to each other that is smaller than a difference of the first and second intrinsic switch-on delays.

Method and display device for reducing switch-on delay between different light emission components

A display, a circuit arrangement for a display and a method of operating a circuit arrangement of a display are disclosed. In an embodiment a display includes a plurality of light emitters arranged in a plurality of rows and columns, each row including an electric line and each column including an electric line, a voltage supply for providing a first voltage level to the electric lines of the rows and a second voltage level to the electric lines of the columns and a light emitter arranged in a first row and a first column and interconnecting the electric line of the first row and the electric line of the first column, wherein the electric line of the first column includes a current source, the current source being adapted to be switched on and off and to provide an electric current to drive the light emitter.

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Wuppertal, Germany

Marcel Severin