G02F 1/15 based on an electrochromic effect
Introduced: January 1990
Full Title
Full titles differ between systems:
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics > for the control of the intensity, phase, polarisation or colour > based on an electrochromic effect
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics > for the control of the intensity, phase, polarisation or colour (G02F1/29, G02F1/35 take precedence) > based on an electrochromic effect
Of 7 combined children, 5 exist in both systems.
2 codes are CPC-only extensions.
Note: 2 CPC extensions are marked as secondary classification only.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G02F 1/1503 caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions since 2019 IPC+CPC Available in IPC and CPC
- G02F 1/1506 caused by electrodeposition, e.g. electrolytic deposition of an inorganic material on or close to an electrode since 2019 +1 CPC IPC+CPC Available in IPC and CPC
- G02F 1/1514 characterised by the electrochromic material, e.g. by the electrodeposited material since 2019 +1 CPC IPC+CPC Available in IPC and CPC
- G02F 1/163 Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor since 1990 +1 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class G02,2013–2023, worldwide · Source: EPO PATSTAT
- BOE TECHNOLOGY GROUP COMPANY 13,460
- BOE TECHNOLOGY GROUP COMPANY CN 11,745
- SAMSUNG DISPLAY KR 10,908
- CANON 9,072
- FUJIFILM JP 7,957
- SAMSUNG ELECTRONICS COMPANY KR 7,805
- LG DISPLAY COMPANY KR 6,558
- CHINESE ACADEMY OF SCIENCES 5,855
- NITTO DENKO CORPORATION JP 5,817
- OLYMPUS CORPORATION JP 4,579
Top Applicants (CPC)
Class G02,2013–2023, worldwide · Source: EPO PATSTAT
- SAMSUNG DISPLAY KR 14,409
- BOE TECHNOLOGY GROUP COMPANY CN 14,236
- BOE TECHNOLOGY GROUP COMPANY 11,826
- SAMSUNG ELECTRONICS COMPANY KR 10,141
- FUJIFILM JP 8,506
- LG DISPLAY COMPANY KR 7,558
- NITTO DENKO CORPORATION JP 6,306
- OLYMPUS CORPORATION JP 5,336
- SONY CORPORATION JP 5,097
- CANON JP 4,814