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1. WO1991000621 - LIGHT-EMITTING DIODE DRIVE CIRCUIT

Publication Number WO/1991/000621
Publication Date 10.01.1991
International Application No. PCT/JP1990/000810
International Filing Date 22.06.1990
IPC
H01S 5/042 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
5Semiconductor lasers
04Processes or apparatus for excitation, e.g. pumping
042Electrical excitation
H03K 17/0412 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and -breaking
04Modifications for accelerating switching
041without feedback from the output circuit to the control circuit
0412by measures taken in the control circuit
H03K 17/60 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and -breaking
51characterised by the use of specified components
56by the use, as active elements, of semiconductor devices
60the devices being bipolar transistors
H05B 33/08 2006.01
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
33Electroluminescent light sources
08Circuit arrangements for operating electroluminescent light sources
CPC
H01S 5/0428
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
5Semiconductor lasers
04Processes or apparatus for excitation, e.g. pumping, ; e.g. by electron beams
042Electrical excitation ; ; Circuits therefor
0428for applying pulses to the laser
H03K 17/04126
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and –breaking
04Modifications for accelerating switching
041without feedback from the output circuit to the control circuit
0412by measures taken in the control circuit
04126in bipolar transistor switches
H03K 17/603
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and –breaking
51characterised by the components used
56by the use, as active elements, of semiconductor devices
60the devices being bipolar transistors
603with coupled emitters
H05B 45/00
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
45Circuit arrangements for operating light emitting diodes [LED]
H05B 45/37
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
45Circuit arrangements for operating light emitting diodes [LED]
30Driver circuits
37Converter circuits
Y02B 20/347
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
20Energy efficient lighting technologies
30Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
34Inorganic LEDs
341Specially adapted circuits
346Switching regulators
347configured as a current source
Applicants
  • MITSUBISHI RAYON CO., LTD. [JP/JP]; 3-19 Kyobashi 2-chome Chuo-ku Tokyo 104, JP (AllExceptUS)
  • SONY CORPORATION [JP/JP]; 7-35, Kitashinagawa 6-chome Shinagawa-ku Tokyo 141, JP (AllExceptUS)
  • YAGI, Keiji [JP/JP]; JP (UsOnly)
  • ZENBA, Kazuhiro [JP/JP]; JP (UsOnly)
  • SEKIGUCHI, Yukihiro [JP/JP]; JP (UsOnly)
  • ISHIKAWA, Fumio [JP/JP]; JP (UsOnly)
  • YAMAMOTO, Tetsuo [JP/JP]; JP (UsOnly)
  • AOKI, Takayuki [JP/JP]; JP (UsOnly)
Inventors
  • YAGI, Keiji; JP
  • ZENBA, Kazuhiro; JP
  • SEKIGUCHI, Yukihiro; JP
  • ISHIKAWA, Fumio; JP
  • YAMAMOTO, Tetsuo; JP
  • AOKI, Takayuki; JP
Agents
  • TSUCHIYA, Masaru; Tsuchiya Patent Office Eiwa Bldg. 9-18 Nishishinjuku 1-chome Shinjuku-ku Tokyo 160, JP
Priority Data
1/16186124.06.1989JP
1/16186224.06.1989JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) LIGHT-EMITTING DIODE DRIVE CIRCUIT
(FR) CIRCUIT DE COMMANDE DE DIODE ELECTROLUMINESCENTE
Abstract
(EN)
A light-emitting diode drive circuit comprising a current feeding circuit (3) having a first transistor (16) which receives at the base thereof a first drive pulse signal (S3) sent from a signal receiving circuit, and a second transistor (15) of which the collector is connected to a light-emitting diode (2), of which the emitter is connected to a current source (24) together with the emitter of the first transistor (16), and which receives at the base thereof a second drive pulse signal (S2) having a phase opposite to that of the first drive pulse signal (S3); a fall time shortening circuit (6) including a third transistor (13) which is connected in parallel with the light-emitting diode (2) and which, in response to its base input, short-circuits both terminals of the light-emitting diode (2) at the time of turn-off; and a rise time shortening circuit (5) including a circuit (4) that generates a peaking current at the time of turning the light-emitting diode (2) on and a fourth transistor (14) that is connected in series with the third transistor (13) and adds the peaking current to the drive current when the light-emitting diode (2) is turned on. The circuit shortens the rise and fall times of light pulses outputted, improving the response speed of even a light-emitting diode (2) having poor intrinsic response characteristics, for example, a light-emitting diode which emits red light in a short wavelength band.
(FR)
Circuit de commande de diode électroluminescente comprenant un circuit d'alimentation en courant (3) possédant un premier transistor (16) qui reçoit sur sa base un premier signal impulsionnel de commande (S3) envoyé par un circuit récepteur de signaux, et un deuxième transistor (15) dont le collecteur est relié à une diode électroluminescente (2), dont l'émetteur est relié à une source de courant (24) conjointement avec l'émetteur du premier transistor (16), et qui reçoit sur sa base un deuxième signal impulsionnel de commande (S2) de phase opposée à celle du premier signal impulsionnel de commande (S3); un circuit réducteur du temps de décroissance (6) comprenant un troisième transistor (13) qui est relié en parallèle avec la diode électroluminescente (2) et qui, en réponse au signal d'entrée appliqué sur sa base, court-circuite les deux bornes de la diode électroluminescente (2) au moment de la mise hors tension; un circuit réducteur du temps de montée (5) comprenant un circuit (4) produisant un courant de crête au moment de la mise sous tension de la diode électroluminescente (2), et un quatrième transistor (14) qui est relié en série avec le troisième transistor (13) et qui additionne le courant de crête au courant de commande lorsque la diode électroluminescente (2) est mise sous tension. Le circuit réduit les temps de décroissance et de montée des impulsions lumineuses émises, ce qui améliore la vitesse de réaction d'une diode électroluminescente (2) présentant des caractéristiques de réaction intrinsèques médiocres, par exemple une diode électroluminescente émettant de la lumière rouge dans une bande de courte longueur d'onde.
Also published as
Latest bibliographic data on file with the International Bureau