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PCE
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DIFF Subgroup
H01J 31/50

Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Cathode-ray tubes; Electron-beam tubes > having a screen on or from which an image or pattern is formed, picked-up, converted, or stored > Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output

CPC:

Cathode ray tubes; Electron beam tubes (H01J25/00, H01J33/00, H01J35/00, H01J37/00 take precedence; details of cathode ray tubes or of electron beam tubes H01J29/00) > having a screen on or from which an image or pattern is formed, picked up, converted, or stored > Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output

CPC subdivides this area 3x more granularly than IPC with 5 additional codes.

5 codes are CPC-only extensions.

Child Classifications

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  • H01J 31/503 CPC only CPC only
  • H01J 31/505 CPC only CPC only
  • H01J 31/508 CPC only CPC only
  • H01J 31/52 having grid-like image screen through which the electron ray or beam passes and by which the ray or beam is influenced before striking the luminescent output screen, i.e. having "triode action" IPC+CPC Available in IPC and CPC
  • H01J 31/54 in which the electron ray or beam is reflected by the image input screen on to the image output screen IPC+CPC Available in IPC and CPC
  • H01J 31/56 for converting or amplifying images in two or more colours IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class H01,2013–2023, worldwide · Source: EPO PATSTAT

  1. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
  2. SAMSUNG ELECTRONICS COMPANY KR 42,206
  3. LG CHEM KR 21,383
  4. APPLIED MATERIALS US 20,441
  5. LG ENERGY SOLUTION KR 20,279
  6. SAMSUNG DISPLAY KR 19,725
  7. CHINESE ACADEMY OF SCIENCES 19,400
  8. TOYOTA MOTOR CORPORATION 18,819
  9. SGCC(STATE GRID CORPORATION OF CHINA) 18,082
  10. TOKYO ELECTRON JP 17,634

Top Applicants (CPC)

Class H01,2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG ELECTRONICS COMPANY KR 37,897
  2. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 36,116
  3. APPLIED MATERIALS US 21,640
  4. LG ENERGY SOLUTION KR 20,770
  5. LG CHEM KR 19,835
  6. TOKYO ELECTRON JP 18,519
  7. ROBERT BOSCH DE 14,595
  8. INTEL CORPORATION US 13,580
  9. MURATA MANUFACTURING COMPANY JP 12,151
  10. SAMSUNG SDI COMPANY KR 12,080