US 11,756,479 B2
Display device with pixels and control unit
Thorsten Frank Baumheinrich, Altdorf (DE); and Hubert Halbritter, Dietfurt (DE)
Assigned to OSRAM OPTO SEMICONDUCTORS GMBH, Regensburg (DE)
Appl. No. 17/434,320
Filed by OSRAM OPTO SEMICONDUCTORS GMBH, Regensburg (DE)
PCT Filed Feb. 20, 2020, PCT No. PCT/EP2020/054534
§ 371(c)(1), (2) Date Apr. 5, 2022,
PCT Pub. No. WO2020/173810, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 10 2019 105 001.4 (DE), filed on Feb. 27, 2019.
Prior Publication US 2022/0238064 A1, Jul. 28, 2022
Int. Cl. G09G 3/32 (2016.01); G09G 3/20 (2006.01)
CPC G09G 3/32 (2013.01) [G09G 3/2011 (2013.01); G09G 3/2014 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/0221 (2013.01); G09G 2310/0251 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A display device, comprising:
a plurality of pixels arranged in an array with rows and columns,
a plurality of column lines, each connected to the pixels of one of the columns,
a plurality of row lines, each connected to the pixels of one of the rows, and
a control unit coupled to the plurality of column lines and configured to generate a column pulse for a selected column line of the plurality of column lines, and connected to the plurality of row lines and configured to generate a data signal for a selected row line from the plurality of row lines,
wherein the data signal comprises a set pulse which, when the pixel is set to a radiating state, is applied to the pixel connected to the selected column and row line at least in a portion when the column pulse is applied to the pixel, and drives the pixel such that a light emission of the pixel depends on the time offset between the column pulse and the set pulse,
wherein the plurality of pixels each comprise a light emitting semiconductor device and a pixel controller, and
wherein the pixel controller comprises a charge storage for the energy of the set pulse, the charge amount of the charge storage being limited by a protection diode or circuitry in parallel with the charge storage.