Increased pwm depth in digital driving of active matrix displays

A method for digital driving of an active matrix display with a predetermined frame rate is described. The display contains a plurality of pixels organized in a plurality of rows and a plurality of columns. The method includes representing each of the plurality of pixels of an image to be displayed within a frame by an n-bit digital image code. The method also includes dividing the image frame into sub-frames, which may be of substantially equal duration. Within each subframe, the method includes sequentially selecting at least one of the plurality of rows twice. Upon a first selection, a first digital code is written to the selected row and upon a second selection a second digital code is written to the selected row. There is a predetermined time delay between the second selection and the first selection, which in at least one of the sub-frames deviates from a power of 2. Digital driving circuitry is also described.

Patent Publication Number: EP3547302

Year filing: 2019

Year approval: 2020

Year publication: 2019

Status: Requested

Technology domains: Audio-visual technology

Validated for IOF-key: Yes

Attributed to: Associatie KULeuven