GB1310790A - Light intensity indicator - Google Patents
Light intensity indicatorInfo
- Publication number
- GB1310790A GB1310790A GB1310790DA GB1310790A GB 1310790 A GB1310790 A GB 1310790A GB 1310790D A GB1310790D A GB 1310790DA GB 1310790 A GB1310790 A GB 1310790A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- colours
- bright
- merge
- light intensity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000003086 colorant Substances 0.000 abstract 4
- 239000000463 material Substances 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
- B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
- B60Q1/1415—Dimming circuits
- B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/38—Photometry, e.g. photographic exposure meter using wholly visual means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
- B60Q2300/30—Indexing codes relating to the vehicle environment
- B60Q2300/31—Atmospheric conditions
- B60Q2300/314—Ambient light
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
1310790 Light intensity indicator P PROBERT 25 Nov 1971 55835/71 Heading G1P A light intensity indicator to indicate when natural light conditions are too dark or too bright in given situations comprises a sheet material forming a background colour on which is fixed a symbol of a second colour wherein the shades of the two colours are so chosen for natural light conditions in a given situation that when said light is too dark or too bright the colours merge and become indistinguishable. Where the colours are matt they are designed to merge when the light fails, e.g. to indicate lighting-up time for road vehicles or when dipped head lights should be used. If the colours are luminous they are designed to merge when the light is too bright.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5583571 | 1971-11-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1310790A true GB1310790A (en) | 1973-03-21 |
Family
ID=10475013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1310790D Expired GB1310790A (en) | 1971-11-25 | 1971-11-25 | Light intensity indicator |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1310790A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1767967A3 (en) * | 2005-09-26 | 2007-05-30 | Osram Sylvania Inc. | Led lamp with direct optical coupling to an optical light guide having purality of light pipes in axial arrangement |
-
1971
- 1971-11-25 GB GB1310790D patent/GB1310790A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1767967A3 (en) * | 2005-09-26 | 2007-05-30 | Osram Sylvania Inc. | Led lamp with direct optical coupling to an optical light guide having purality of light pipes in axial arrangement |
US7588359B2 (en) | 2005-09-26 | 2009-09-15 | Osram Sylvania Inc. | LED lamp with direct optical coupling in axial arrangement |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |