GB1328789A - Appatatus for controlling the intensity of vehicle headlamps - Google Patents
Appatatus for controlling the intensity of vehicle headlampsInfo
- Publication number
- GB1328789A GB1328789A GB5452169A GB1328789DA GB1328789A GB 1328789 A GB1328789 A GB 1328789A GB 5452169 A GB5452169 A GB 5452169A GB 1328789D A GB1328789D A GB 1328789DA GB 1328789 A GB1328789 A GB 1328789A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- signal
- pulse
- intensity
- amplitude
- 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
- 230000001419 dependent effect Effects 0.000 abstract 2
- 235000009421 Myristica fragrans Nutrition 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000001115 mace 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
- H05B39/04—Controlling
- H05B39/041—Controlling the light-intensity of the source
- H05B39/042—Controlling the light-intensity of the source by measuring the incident light
-
- 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
- B60Q2300/05—Special features for controlling or switching of the light beam
- B60Q2300/054—Variable non-standard intensity, i.e. emission of various beam intensities different from standard intensities, e.g. continuous or stepped transitions of intensity
-
- 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
-
- 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
- B60Q2300/33—Driving situation
- B60Q2300/332—Driving situation on city roads
- B60Q2300/3321—Detection of streetlights
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
1328789 Controlling vehicle headlamps R L MOORE and D G W MACE 3 Nov 1970 [6 Nov 1969] 54521/69 Heading G1A An apparatus for controlling the intensity of vehicle headlamps, which is responsive only to light given out by street lamps supplied by an A.C. power source, comprises a light sensitive means connected to a conversion means providing a signal dependent upon the amplitude of the alternating intensity variations, and control means adapted to control a lamp intensity in dependence upon the amplitude of the intensity variations. In the two embodiments disclosed, control is effected by switching off a dipped headlamp element for the duration of a pulse produced from a monostable multi-vibrator. The frequency of the switching being dependent on the amplitude of said alternating intensity variation. In one embodiment, Fig.1, light is received by a detector 10 whose signal is amplified by an A.C. amplifier 11 (thereby excluding D.C. components due to twilight etc.) A D.C. restoration circuit 12 supplies a peak detector circuit 13 whose output waveform is in proportion to the peaks of the D.C. restored signal. A low level detector 14 (circuit Fig. 2 not shown) provides a D.C. signal which is proportional to the magnitude of the minima in the signal from the peak detector circuit, the signal being subsequently inverted by inverter 19 and fed into a comparator 18. The D.C. restoration circuit 12 also feeds a pulse generator 15 which amplifies the D.C. restored signal and dips it to provide rectangular pulses of constant duration. These pulses are fed to a counter 16 and then by way of a digital-to-analogue converter 17 to the comparator 18. When the output of the inverter equals the output of the digital-toanalogue converter, the comparator activates a gate 20 allowing a pulse from a generator 15 to pass to a switching circuit 21 which disconnects the dip filaments of headlamps 22, 23 for the duration of that pulse. At the same time the pulse passing through the gate 20 resets the counter 16 by way of a reset circuit 24. A detailed transistor circuit is described with reference to Fig.3 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5452169 | 1969-11-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1328789A true GB1328789A (en) | 1973-09-05 |
Family
ID=10471293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5452169A Expired GB1328789A (en) | 1969-11-06 | 1969-11-06 | Appatatus for controlling the intensity of vehicle headlamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1328789A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2705320A1 (en) * | 1976-02-10 | 1977-08-11 | Lucas Industries Ltd | VEHICLE HEADLIGHT CONTROL CIRCUIT |
| EP0062730A1 (en) * | 1981-04-15 | 1982-10-20 | Sven Oscar WILJE | A device for the control of the luminous flux from a main beam bulb in a motor vehicle |
| EP1224097A2 (en) * | 2000-03-23 | 2002-07-24 | Robert Bosch Gmbh | Device for automatically switching lighting installations of motor vehicles |
-
1969
- 1969-11-06 GB GB5452169A patent/GB1328789A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2705320A1 (en) * | 1976-02-10 | 1977-08-11 | Lucas Industries Ltd | VEHICLE HEADLIGHT CONTROL CIRCUIT |
| EP0062730A1 (en) * | 1981-04-15 | 1982-10-20 | Sven Oscar WILJE | A device for the control of the luminous flux from a main beam bulb in a motor vehicle |
| EP1224097A2 (en) * | 2000-03-23 | 2002-07-24 | Robert Bosch Gmbh | Device for automatically switching lighting installations of motor vehicles |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees | ||
| 427A | Application made for restoration (sect. 27/1949) | ||
| 427C | Application for amendment of specification now open to opposition (sect. 27/1949) | ||
| 427B | Order made restoring the patent (sect. 27/1949) | ||
| PCNP | Patent ceased through non-payment of renewal fee |