EP 0457497 A3 19930526 - WAVEFORM DISPLAYING DEVICE
Title (en)
WAVEFORM DISPLAYING DEVICE
Publication
Application
Priority
JP 12733590 A 19900516
Abstract (en)
[origin: EP0457497A2] A waveform displaying device, in which a measured analogue signal is converted into a digital signal by means of an analogue to digital converter and thereafter the digital signal is directly inputted in a display device (19) such as a raster scanning display, a liquid crystal display device, effecting the display while controlling the brightness of pixels so as to reproduce to display waveform of the measured analogue signal. In the present device the brightness of pixels is varied, depending on slew rate of the waveform, so that the brightness of interpolation lines is increased, when differences between inputted waveform data are small, and the brightness is decreased, when the differences are small. Further places, where the density of waveforms is high, are displayed brightly by accumulating the brightness thereof. In this way, since peculiar points in the waveforms such as points, at which the phase, the frequency or the amplitude is varied, are displayed as points, at which the brightness is varied, it is possible to find easily these points and further observation is easy, also in the case where a number of waveforms are displayed, superposed on each other. <IMAGE>
IPC 1-7
IPC 8 full level
G01R 13/20 (2006.01); G06F 3/05 (2006.01); G09G 1/16 (2006.01); G09G 5/36 (2006.01)
CPC (source: EP)
G09G 1/162 (2013.01)
Citation (search report)
- [A] EP 0347901 A2 19891227 - ANRITSU CORP [JP]
- [A] US 4464656 A 19840807 - NAKAMURA MASAKAZU [JP]
- [A] US 2812472 A 19571105 - WELLIVER CLARENCE L
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0457497 A2 19911121; EP 0457497 A3 19930526; CA 2041949 A1 19911117; JP H0422874 A 19920127
DOCDB simple family (application)
EP 91304179 A 19910509; CA 2041949 A 19910507; JP 12733590 A 19900516