H04N3/23 - CPC Classification Index

ClassID:

229406 ⎘

H04N3/23 - CPC Classification

Classification description:

Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections; Circuits for controlling dimensions, shape or centering of picture on screen Distortion correction, e.g. for pincushion distortion correction, S-correction

Sub-classes:

H04N3/233 » using active elements 2
H04N3/237 » using passive elements, e.g. diodes 1

Recent Application in this class:

20170187927

METHOD AND ELECTRONIC DEVICE FOR SWITCHING VIDEO DISPLAY WINDOW

20160379345

Image displaying system

20160355024

2-D straight-scan on imaging surface with a raster polygon

20150352859

2-D straight-scan on imaging surface with a raster polygon

20140267866

Non-uniform correction illumination pattern

20140160443

Projector and display control method for projector with orientation correction

20140049756

Image projection apparatus and control method thereof

20130076852

2-D straight-scan on imaging surface with a raster polygon

20120249818

Image capturing system and image capturing method, involving image restoration processing

20110157563

Projection-type display apparatus with a keystone correction feature for correcting keystone distortion in a projection image

20090297060

Image processing apparatus and image processing method

20070204208

Device and method for correcting kinescope scan distortion

20060220597

Cathode-ray tube display apparatus

20060158563

Convergence compensation apparatus and convergence method for a projection television