(19) Japan Patent Oflice (JP)
`
`(12) Japanese Unexamined Patent
`Application Publication (A)
`
`(51) Int. Cl.5
`H01L 33/00
`J’I‘ GOQG 3/14
`
`Identification codes
`
`I
`I
`
`JPO file numbers
`8934-4M
`8621-56
`
`(11) Japanese Unexamined Patent
`Appfica‘im‘ “'bfimfi” NW
`H5—l98843
`
`(43) Publication date August 6. 1993
`
`Technical indications
`
`Request for examination: Not yet requested: Number of claims: 4 (Total of 3 pages)
`
`(21) Application number
`(22) Date of application
`
`H4-10126
`January 23. 1992
`
`(71) Applicant
`
`(72) Inventor
`
`(74) Agent
`
`
`
`000003 757
`TOSHIBA LIGHTING & TECHNOLOGY CORPORATION
`1—4-28 MlTA. MINATO-KU. TOKYO
`
`TAKEN0. MASATOSHI
`% Toshiba Lighting & Technology Corporation
`1-4-28 Mita. Minato-ku. Tokyo
`Patent attorney ONODA, YOSHIHIRO
`
`(54) [TITLE or THE INVENTION]
`Light-Emitting Diode Lamp and Light-Emitting Diode
`Display Device
`(57) [Answer]
`[013m]
`The object is to provide a light-emitting diode lamp and
`light-emitting diode display device that improves the light
`intensity and improves space efliciency without increasing
`the number of components. and that also has benefits in
`terms of light emission characteristics and economics as
`well.
`
`[STRUCTURE]
`The present invention is a lamp or light-emitting diode
`display device comprising a plurality of light-emitting
`diodes and a rectifying bridge circuit. wherein:
`light-
`emitting diodes are used for the diodes in the rectifying
`bridge circuit. and the light emission surface sides of the
`light-emitting diodes that structure the rectifying bridge
`circuit are intermingled with the light emission surface
`sides of these light-emitting diodes.
`
`
`
`Satco Products, Inc., Ex. 1021
`Satco Products, Inc., Ex. 1021
`Page 1 of 5
`Page 1 of 5
`
`

`

`[PATENT CLAIMS]
`[CLAIM 1]
`A light-emitting diode lamp comprising a plurality of
`light-emitting diodes and a rectifying bridge circuit,
`wherein:
`a light-emitting diode is used as a diode for structuring
`the rectifying bridge circuit.
`[CLAIM 2]
`A light-emitting diode lamp as set forth in Claim 1,
`wherein:
`the light emission surface side of the light-emitting diode
`for structuring the rectifying bridge circuit is intermingled
`with the light emission surface sides of the light-emitting
`diodes.
`[CLAIM 3]
`A light-emitting diode display device that is a light-
`emitting device wherein a plurality of light-emitting diodes
`is lit by an AC power supply through a rectifying bridge
`circuit, wherein:
`a light-emitting diode is used as a diode for structuring
`the rectifying bridge circuit.
`[CLAIM 4]
`A light-emitting diode display device as set forth in
`Claim 3, wherein:
`a light emission surface side of a light-emitting diode for
`structuring a rectifying bridge circuit is intermingled with
`light emission surface sides of light-emitting diodes.
`[DETAILED EXPLANATION OF THE INVENTION]
`[0001]
`[FIELD OF APPLICATION IN INDUSTRY]
`The present invention relates to a light-emitting diode
`lamp or light-emitting diode display device used to display,
`through the light emission, text, graphics, or the like, in
`displays such as illuminated display boards, traffic signals,
`or the like.
`[0002]
`[PRIOR ART]
`in
`that are used
`lamps
`In
`light-emitting diode
`conventional displays such as traffic signals, the structure is
`such that a plurality of light-emitting diodes and a
`rectifying circuit for lighting, through an AC power supply,
`and the like, are attached to a substrate, or the substrate is
`contained within a transparent bulb. Given this, in the
`circuit, a plurality of light-emitting diodes 5, 5,…, wherein
`light-emitting portions are embedded in, for example,
`bullet-shaped transparent synthetic resin that has a lens
`effect, is connected in series, on the output side of a
`rectifying bridge circuit 3 through current-limiting resistors
`4 and 4 and the rectifying bridge circuit 3, which uses four
`rectifying diodes 2, 2,…, for converting an AC current into
`a DC current, to an AC input terminal 1, as depicted in
`FIG. 3. Additionally, recently rectifying bridge circuits
`have been integrated into ICs 6, as depicted in FIG. 4.
`[0003]
`[PROBLEM SOLVED BY THE PRESENT INVENTION]
`This type of light-emitting diode lamp or light-emitting
`diode display has had a problem in that, despite having the
`benefits of greater robustness to vibration, reduced electric
`power consumption, increased service life, and reduced
`heat production when compared to light bulbs that use
`filaments, there has been a problem in that the light
`intensity has been low. As means for solving this problem,
`
`Japanese Unexamined Patent Application Publication H5-198843
`(2)
`
`the light intensity can be improved substantially through
`increasing the number of light-emitting diodes; however,
`there is a limit on placement of a large number of circuit
`components within a prescribed space.
`[0004]
`In a light-emitting diode lamp or light-emitting diode
`display device, both the diodes for rectification, used in the
`rectifying bridge circuit, and the light-emitting diodes used
`for
`the display, as diodes, have
`identical electrical
`characteristics, and the only difference therebetween is that
`light-emitting diodes emit light while the diodes for
`rectification do not emit light, and the present inventor has
`focused on these diodes for rectification. That is, while the
`number of light-emitting diodes should be increased in
`order to substantially increase the intensity of light, simply
`increasing the number of diodes has a problem in that this
`increases the cost.
`[0005]
`The present invention solves the problem area described
`above, and the object thereof is to provide a light-emitting
`diode lamp and light-emitting diode display device that also
`has benefits in light emission characteristics and in
`economics.
`[0006]
`[MEANS FOR SOLVING THE PROBLEM]
`The present invention is a light-emitting diode lamp or
`light-emitting diode display device comprising a plurality
`of light-emitting diodes and a rectifying bridge circuit,
`wherein a light-emitting diode is used as a diode for
`structuring the rectifying bridge circuit.
`[0007]
`Moreover, the light emission surface side of the light-
`emitting diode for structuring the rectifying bridge circuit is
`intermingled with the light emission surface sides of the
`light-emitting diodes.
`[0008]
`[OPERATION]
`Using the diodes for rectification, used in the rectifying
`bridge circuit for converting the AC current into a DC
`current, as also the diodes for light emission increase the
`number of diodes that emit light, enabling an improvement
`in the light intensity without increasing the number of
`circuit components.
`[0009]
`[EMBODIMENT]
`An embodiment according the present invention will be
`explained below in a light-emitting diode lamp that is used
`as, for example, a traffic signal, depicted in FIG. 1 and FIG.
`2. FIG. 1 is a circuit diagram, where those parts that are
`identical to those in FIG. 3 are assigned identical reference
`symbols, and explanations thereof are omitted. The part
`that is different from FIG. 3 is the point that the diodes for
`rectification used in the rectifying bridge circuit 3 serve as
`diodes 5A for both rectification and light emission. Of
`course, the diodes 5A for both rectification and light
`emission produce prescribed rectification characteristics
`that have the same electrical characteristics as the rectifying
`diodes in FIG. 3.
`[0010]
`Moreover, as in FIG. 2, the individual light-emitting
`diodes 5, 5,… (5 diodes) and 5A, 5A,… (4 diodes) are
`intermingled attached to the substrate 6, with the light-
`
`Satco Products, Inc., Ex. 1021
`Page 2 of 5
`
`

`

`Japanese Unexamined Patent Application Publication H5-198843
`
`other shapes instead. or a substrate. or the like. wherein a
`plurality of light-emitting diode chips. with the surrounding
`thereof not covered. may be contained within a bulb. or
`may be attached to a direct display panel. Furthermore. the
`layout of the light-emitting diode is not limited to that of
`the embodiment. but rather may be different vertically and
`horizcmtally. and the outer periphery need not necessarily
`be a square. but rather may be another polygon. a circle. or
`the like.
`
`[0013]
`[EFFECI'S or THE INVENTION]
`The present
`invention. as described in detail above.
`enables an increase in illumination brightness through
`using diodes for both rectification and light emission for
`the diodes that conventionally have been used exclusively
`for rectification. to add the light emitted from these diodes
`to the light emitted from the diodes that were used
`exclusively for light emission.
`[0014]
`Moreover. this can reduce the number of components for
`structuring a lamp or a display device. enabling eflicient
`use of space and reduction of costs.
`[BRIEF DESCRIPTIONS OF THE DRAWINGS]
`FIG. 1 is a circuit diagram depicting an example of a
`light-emitting diode
`lamp according to the present
`invention.
`
`FIG. 2 is a front view of the displaying portion side of an
`embodiment according the present invention.
`FIG. 3 is a circuit diagram depicting an example of a
`conventional light-emitting diode lamp.
`FIG. 4 is a circuit diagram depicting another example of
`a conventional light-emitting diode lamp.
`[EXPLANATION or RHERENCE SYMBOLS]
`1: AC Input Terminal
`2: Rectifying Diode
`3. 6: Rectifying Bridge Circuits
`4: Resistor
`
`5: Light-Emitting Diode
`5A: Diode for Both Rectification and Light Emission
`7: Substrate
`
`5 5
`
`A
`
`5
`
`5A 5
`
`[no.2]
`
`Slbstnle
`
`T
`
`5A
`
`5
`
`53 5
`
`emitting surface sides thereof. which are manufactured
`from transparent synthetic resin to produce a lens eHed.
`aligned. Note that as a lamp these are contained in a
`transparent outer enclosure made from glass or a synthetic
`resin. not shown. and. if necessary. the lamp is completed
`through attaching a base. In this light-emitting diode lamp.
`the light-emitting diodes 5. 5.... and the diodes 5A. 5A.....
`for both rectification and light emission. which are
`connected through a resistor, are lit by DC that is converted
`by the diodes 5A. 5A..... for both rectification and light
`emission. of the rectifying bridge circuit 3. through the
`application of a prescribed AC power to the AC input
`terminal 1. Note that while some degree of flashing will be
`visible because the diodes 5A. 5A..... for both rectification
`and light emission are lit through half-wave currents. these
`are four diodes that are mixed in among many diodes. and
`thus this will not exist noticeably when viewed from a
`distance.
`[0011]
`As a specific example of the present invention. a lamp
`was structured through a bridge connection of four
`TLRAl SSB light-emitting diodes manufactured by Toshiba
`for the diodes 2 for rectification and light emission of the
`rectifying bridge circuit 3 (with the value of a resistance 4
`adjusted so as to have a prescribed rectified output power).
`connected to five TLRAl 55B light-emitting diodes 5.
`manufactured by Toshiba. in the circuit of FIG. 2. and.
`upon measurement. the light intensity was approximately
`4.1 cd. which was a 65% improvement in light intensity
`when compared to the light emitted in the conventional
`case of five Toshiba TLRAl SSB light-emitting diodes
`alone.
`[0012]
`Note that the present invention is not limited to only the
`embodiment described above. where.
`for example.
`the
`collection of light-emitting diodes is not limited to being a
`light-emitting diode lamp. but
`rather
`that wherein a
`plurality of light-emitting diodes is provided on a substrate.
`or the like. may be attached to a direct display panel.
`Moreover. there is no limitation to the shape of the light-
`emitting diodes being the bullet shape that is manufactured
`from transparent synthetic resin. but rather it may be of
`
`[I-‘IG. 1]
`
`3 “mm“!!!(21‘m
`
`4 rm-
`
`E .
`
`.
`
` 5A
`
`Satco Products, Inc., Ex. 1021
`Satco Products, Inc., Ex. 1021
`Page 3 of 5
`Page 3 of 5
`
`

`

`Japanese Unexamined Patent Application Publication H5-198843
`(4)
`
`[FIG. 3]
`
`mo. 41
`
`
`
`Satco Products, Inc., Ex. 1021
`Satco Products, Inc., Ex. 1021
`Page 4 of 5
`Page 4 of 5
`
`

`

`TRANSLATOR’S DECLARATION
`
`Date: March 5, 2020
`
`To whom it may concern:
`
`I, Dr. Warren Smith, hereby declare that I am conversant with the English and Japanese
`languages and am a competent translator thereof. I declare further that to the best of my
`knowledge and belief the foregoing is a true and correct translation of the accompanying
`Japanese Unexamined Patent Application Publication JPH05198843A published on August 6,
`1993.
`
`I declare that I believe that all statements made herein of my own knowledge are true; and
`further that these statements were made with the knowledge that willful false statements and
`the like so made are punishable by fine or imprisonment, or both, under Section 1001 of Title
`18 of the United States Code.
`
`Signature of linguist
`
`Global Solutions. Local Expertise.
`
`Satco Products, Inc., Ex. 1021
`Page 5 of 5
`
`