Scanning details of television systems; Combination thereof with generation of supply voltages [4]
3
/
02
•
by optical-mechanical means only (H 04 N 3/36 takes precedence; optical scanning systems in general G 02 B 26/10) [2]
3
/
04
•
•
having a moving aperture
3
/
06
•
•
having a moving lens or other refractor
3
/
08
•
•
having a moving reflector
3
/
09
•
•
•
for electromagnetic radiation in the invisible region, e.g. infra-red [4]
3
/
10
•
by means not exclusively optical-mechanical (H 04 N 3/36 takes precedence; devices or arrangements for the electro-, magneto- or acousto-optical modulation or deflection of light beams G 02 F) [2]
3
/
12
•
•
by switched stationary formation of lamps, photocells, or light relays
3
/
14
•
•
by means of electrically scanned solid-state devices
3
/
15
•
•
•
for picture signal generation [3]
3
/
16
•
•
by deflecting electron beam in cathode-ray tube (producing sawtooth waveforms H 03 K 4/00)
3
/
18
•
•
•
Generation of supply voltages, in combination with electron beam deflecting [4]
3
/
185
•
•
•
•
Maintaining dc voltage constant (regulation of dc voltage in general G 05 F) [4]
3
/
19
•
•
•
•
Arrangements or assemblies in supply circuits for the purpose of withstanding high voltages [3]
Prevention of damage to cathode-ray tubes in event of failure of scanning
3
/
22
•
•
•
Circuits for controlling dimensions, shape or centering of picture on screen
3
/
223
•
•
•
•
Controlling dimensions (by maintaining the cathode-ray tube high voltage constant H 04 N 3/185) [4]
3
/
227
•
•
•
•
Centering [4]
3
/
23
•
•
•
•
Distortion correction, e.g. for pincushion distortion correction, S-correction [4]
3
/
233
•
•
•
•
•
using active elements [4]
3
/
237
•
•
•
•
•
using passive elements [4]
3
/
24
•
•
•
Blanking circuits
3
/
26
•
•
•
Modifications of scanning arrangements to improve focusing (focusing circuits in general H 01 J)
3
/
27
•
•
•
Circuits special to multi-standard receivers (circuitry of multi-standard receivers in general H 04 N 5/46) [3,4]
3
/
28
•
•
producing multiple scanning, i.e. using more than one spot at the same time
3
/
30
•
•
otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines
3
/
32
•
•
•
Velocity varied in dependence upon picture information
3
/
34
•
•
•
Elemental scanning area oscillated rapidly in direction transverse to main scanning direction
3
/
36
•
Scanning of motion picture films, e.g. for telecine [2]
3
/
38
•
•
with continuously moving film [4]
3
/
40
•
•
with intermittently moving film [4]
5
/
00
Details of television systems (scanning details or combination thereof with generation of supply voltages H 04 N 3/00; specially adapted for colour television H 04 N 9/00) [4]
5
/
04
•
Synchronising (for television systems using pulse code modulation H 04 N 7/24; in general H 03 L 7/00) [4]
5
/
05
•
•
Synchronising circuits with arrangements for extending range of synchronisation, e.g. by using switching between several time constants [2]
5
/
06
•
•
Generation of synchronising signals
5
/
067
•
•
•
Arrangements or circuits at the transmitter end [4]
5
/
073
•
•
•
•
for mutually locking plural sources of synchronising signals, e.g. studios or relay stations [4]
5
/
08
•
•
Separation of synchronising signals from picture signals
5
/
10
•
•
•
Separation of line synchronising signal from frame synchronising signal
5
/
12
•
•
Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising [2]
5
/
14
•
Picture signal circuitry for video frequency region (H 04 N 5/222 takes precedence) [2]
5
/
16
•
•
Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
5
/
18
•
•
•
by means of "clamp" circuit operated by switching circuit
5
/
20
•
•
Circuitry for controlling amplitude response
5
/
202
•
•
•
Gamma control [4]
5
/
205
•
•
•
for correcting amplitude versus frequency characteristic [4]
5
/
208
•
•
•
•
for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction [4]
5
/
21
•
•
Circuitry for suppressing or minimising disturbance, e.g. moire, halo (suppression of noise in television recording H 04 N 5/911)
5
/
213
•
•
•
Circuitry for suppressing or minimising impulsive noise (H 04 N 5/217 takes precedence) [4]
5
/
217
•
•
•
in picture signal generation [4]
5
/
222
•
Studio circuitry; Studio devices; Studio equipment [4]
5
/
225
•
•
Television cameras [4]
5
/
228
•
•
•
Circuit details for pick-up tubes [4]
5
/
232
•
•
•
Devices for controlling television cameras, e.g. remote control (H 04 N 5/235 takes precedence; control of exposure for cameras G 03 B 7/00); focusing for cameras
G 03 B 13/00; varying magnification for cameras G 03 B 17/00 [4]
5
/
235
•
•
•
Circuitry for compensating for variation in the brightness of the object [4]
5
/
238
•
•
•
•
by influencing optical part of the camera [4]
5
/
243
•
•
•
•
by influencing the picture signal [4]
5
/
247
•
•
•
Arrangement of television cameras [4]
5
/
253
•
•
Picture signal generating by scanning motion picture films or slide opaques, e.g. for telecine (scanning details therefor H 04 N 3/36) [4]
5
/
257
•
•
Picture signal generators using flying-spot scanners (H 04 N 5/253 takes precedence) [4]
5
/
262
•
•
Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects [4]
5
/
265
•
•
•
Mixing [4]
5
/
268
•
•
•
Signal distribution or switching (for broadcasting H 04 H 1/00) [4]
5
/
272
•
•
•
Means for inserting a foreground image in a background image, i.e. inlay, outlay [4]
5
/
275
•
•
•
•
Generation of keying signals [4]
5
/
278
•
•
•
Subtitling [4]
5
/
28
•
•
Mobile studios
5
/
30
•
Transforming light or analogous information into electric information (H 04 N 5/222 takes precedence; scanning details H 04 N 3/00; light transforming elements H 01 J, H 01 L) [2,4]
5
/
31
•
•
Transforming ultrasonic, sonic or infrasonic radiation [4]
5
/
32
•
•
Transforming X-rays
5
/
321
•
•
•
with video transmission of fluoroscopic images [5]
5
/
325
•
•
•
•
Image enhancement, e.g. by subtraction techniques using polyenergetic X-rays [5]
5
/
33
•
•
Transforming infra-red radiation [2]
5
/
335
•
•
using electrically scanned solid-state devices (H 04 N 5/32, H 04 N 5/33 take precedence) [4]
5
/
38
•
Transmitter circuitry (H 04 N 5/14 takes precedence) [4]
5
/
40
•
•
Modulation circuits
5
/
42
•
•
for transmitting at will black-and-white or colour signals
5
/
44
•
Receiver circuitry (H 04 N 5/14 takes precedence) [4]
5
/
445
•
•
for displaying additional information (H 04 N 5/50 takes precedence) [4]
5
/
45
•
•
•
Picture in picture [4]
5
/
455
•
•
Demodulation-circuits (demodulation in general H 03 D) [4]
5
/
46
•
•
for receiving on more than one standard at will (deflecting circuits of multi-standard receivers H 04 N 3/27) [4]
5
/
50
•
•
Tuning indicators; Automatic tuning control (tuning control in general H 03 J) [4]
5
/
52
•
•
Automatic gain control [4]
5
/
53
•
•
•
Keyed automatic gain control [4]
5
/
54
•
•
•
for positively-modulated picture signals (H 04 N 5/53 takes precedence) [4]
5
/
56
•
•
•
for negatively-modulated picture signals (H 04 N 5/53 takes precedence) [4]
5
/
57
•
•
Control of contrast or brightness [4]
5
/
58
•
•
•
in dependance upon ambient light [4]
5
/
59
•
•
•
in dependance upon beam current of cathode ray tube [4]
5
/
60
•
•
for the sound signals
5
/
62
•
•
•
Intercarrier circuits, i.e. heterodyning sound and vision carriers
5
/
63
•
Generation or supply of power specially adapted for television receivers (generation of supply voltages in combination with electron beam deflecting H 04 N 3/18
; regulating of voltage or current in general G 05 F; transformers H 01 F; supplying or distributing electric power, in general H 02 J; static converters H 02 M) [4]
5
/
64
•
Constructional details of receivers, e.g. cabinets, dust covers (furniture aspects A 47 B, e.g.
A 47 B 81/06) [2]
5
/
645
•
•
Mounting of picture tube on chassis or in housing
5
/
65
•
•
Holding-devices for protective discs or for picture masks
5
/
655
•
•
Construction or mounting of chassis, e.g. for varying the elevation of the tube
5
/
66
•
Transforming electric information into light information (scanning details H 04 N 3/00)
