CN2035129U - Semiconductive light emitting display board - Google Patents
Semiconductive light emitting display board Download PDFInfo
- Publication number
- CN2035129U CN2035129U CN 88202258 CN88202258U CN2035129U CN 2035129 U CN2035129 U CN 2035129U CN 88202258 CN88202258 CN 88202258 CN 88202258 U CN88202258 U CN 88202258U CN 2035129 U CN2035129 U CN 2035129U
- Authority
- CN
- China
- Prior art keywords
- epoxy resin
- light emitting
- limiting resistance
- current
- bottom board
- 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.)
- Withdrawn
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
The utility model discloses a semi-conductive light emitting display device, which is characterized in that the bottom board of a printed circuit is positioned on one side of the device and is perpendicular to a display plane, and the bottom board of the printed circuit and the inner wall of the plastic reflecting board with a frame compose an optical reflecting cavity, the bottom board of the circuit, the tube core of the light emitting diode arranged on the bottom board and a current-limiting resistance are sealed in the device by epoxy resin without being exposed. The device has large light-emitting area, and low working voltage (such as 12 volts and 24 volts), safety, convenience, long service life and low cost, and the device can be used as a dual-purpose display device in the daytime and under the environment with low illumination. The semi-conductive light emitting display device can be extensively used for occasions needing to display characters or patterns such as the seat numbers of the theater, the room numbers of the hotels, etc.
Description
The utility model belongs to semiconductor light-emitting display device.
Daily than the low-light (level) environment under the demonstration of character, figure etc. of (generally below 50 lux), as demonstrations such as cinema seat number, accommodation number, hospital bed numbers, for guaranteeing safety, generally require to use LVPS.As use incandescent lamp as light source, and power consumption is big, and is fragile, electroluminescent panel, and the cost height is difficult for promoting.Use common semiconductor plane luminescence device, its structure as the reflection cavity framework, as base plate, is formed the optical reflection chamber with printed circuit board (PCB) by the plastics such as ABS with high reflectance, on the base plate generally by adorning two LED core.(seeing PANASONIC technical report Vol.28, No.1, p74～82, " semiconductor light-emitting display device ") this device is when requiring to show bigger character, figure, and light-emitting area is too little.In addition, drive, must connect current-limiting resistance in addition, make troubles to the user if this device is directly passed to low-tension supply (as 24 volts).
The purpose of this utility model provides a kind of semiconductor planar luminescence display panel big, safe and convenient to use than the light-emitting area of low-light (level) environment that be suitable for.
The utility model structure comprises that ABS of being mixed with the Titanium white powder etc. has the reflecting plate that has frame, printed chassis, a plurality of semiconductor light-emitting-diode tube core, current-limiting resistance, cured epoxy resin several sections that the plastics of high reflectance are made.Said printed circuit board (PCB) adopts silver-plated copper foil plate, the series connection of semiconductor light-emitting-diode tube core is installed in the printed chassis front, the side that it is characterized by the top frame of described plastic reflective plate has a rectangular slit, described printed chassis is positioned at this slit, perpendicular to display plane, form the optical reflection chamber with plastic reflective plate inwall, epoxy resin makes them not expose in the device front circuit board, tube core, current-limiting resistance cure package.The character of required demonstration, figure are on the epoxy resin of front curing or on (the epoxy resin bottom) plastic reflective plate.Current-limiting resistance can adopt following dual mode by dress: the first sensistor chip of connecting with tube core on circuit substrate, it two is a miniature resistance of sealing up a required limit value above circuit substrate.In when encapsulation, resistance is connected with a close electrode, during use, an end of resistance is connected with an end of device, and the other end of external power supply connecting resistance and device electrode makes the packaged resistance into circuit of connecting.
The color of diode chip can be selected according to the needs of use occasion, all can as yellow, green, red.
The character of required demonstration, figure etc. can be write or be printed in the epoxy resin surface of curing or write in advance on the plastic reflective plate of epoxy resin bottom.The paint of clearly writing be can print earlier, japanning or other dark paint covered after to be dried again.Write on epoxy resin surface and help improving the device luminosity.Write on and to protect character, figure etc. not to be subjected to regular wiping to touch and damage on the reflecting plate.
In order to improve illumination effect, evenly mixed fluorescent dye in epoxy resin.
Ornamental for display board is had more, can be with reflecting plate frame outside surface Tu Yi Chrome layer.
In when encapsulation, epoxy resin can inject from the rectangular slit of the frame side of top device, but also opens a rectangular slit at the back side of reflecting plate near the place, top, is used for the injection ring epoxy resins, then with corresponding bar plastic plate embedding.
The utility model is because circuit substrate is contained in the side of device, the whole bottom of reflecting plate is the light-emitting area of device, and current-limiting resistance is encapsulated in device inside, thereby the device light-emitting area is bigger than a common semiconductor display device light-emitting area, and safe and reliable.
Fig. 1, Fig. 2, Fig. 3 are the structural representation of semiconductor light emitting display board.Fig. 1 is its positive front elevation, and Fig. 2 is its top view, and Fig. 3 is its back view.Wherein 5 is the plastic reflective plate, 6 is the frame of plastic reflective plate, 7 epoxy resin for curing, 8 is the character or the figure of required demonstration, 9 for being used for fixing the earrings of display board, 10 for being embedded in the stripe board in the slit of the reflecting plate back side, and 11 are the printed chassis that is hinged with diode chip and resistance in the slit of top device frame side, and 4 is extraction electrode.Fig. 4 and Fig. 5 are LED core and sensistor sheet tipping synoptic diagram on the printed chassis.Fig. 4 is its front elevation, and Fig. 2 is its side view.Wherein 1 is diode chip, and 2 is the silver print circuit substrate, and 3 is the sensistor sheet, and 4 is electrode.Tube core and the series connection of sensistor sheet continue.
Embodiment and manufacture craft are as follows: by required size (routine 5cm * 7cm) suppress the ABS plastic reflecting plate that is mixed with titanium dioxide with mould, the frame side, top of reflecting plate has rectangle, and rectangular (slit of routine 0.5cm * 5cm), the reflecting plate back side has the trapezoidal rectangular (slit of routine 0.5cm * 5cm) near the place, top.With reflecting plate frame Du Chrome (also can not plating).At 3-5 semiconductor light-emitting-diode tube core of the positive series connection tipping of silver-plated copper foil plate (size is corresponding to the elongated rectangular shape of frame side), connect a sensistor chip (as adopting miniature resistance in a side again, can when encapsulation, enclose) on the electrode side, at circuit substrate two ends extraction electrode, use epoxy encapsulation then, the steps include: with the epoxy resin impregnated circuit substrate that adds hardening agent on a small quantity, and it is fixed in the rectangular slit of rectangle of reflecting plate frame side of vertical placement.Solidify the back and stick terylene Pressure sensitive adhesive tape paper in the device front, again from the trapezoidal rectangular slit injection ring epoxy resins at the device back side.Mixed hardening agent and fluorescent dye in the epoxy resin.Fill with the back and embed in this slit, solidify, last on the epoxy resin of front, writing or character or figure that the printshop need show by common technology with corresponding trapezoidal rectangular plastic plate.Another kind of scheme is to write black character in ABS plastic reflecting plate front, encapsulates then.Device brightness is about 20 nits.
Characteristics of the present utility model are that light-emitting area is big, the life-span is long, cost is low, are 1/4th of analogous shape electroluminescent panels. Use voltage low (sending a telegraph luminous plaque is 70～220 volts, and this device only is 12 volts, 24 volts), safety, convenient, reliable. The clear display such as character or figure, and have decoration. Can be used as daytime or dark display device than the usefulness of holding concurrently under the low-light (level) environment. Can be widely used in the occasion that the needs such as cinema seat number, hotel room number show character or figure.
Claims (2)
1, a kind of semiconductor planar luminescence display panel, comprise a plurality of semiconductor light-emitting-diode tube cores, current-limiting resistance, printed chassis, the plastic reflective plate that has frame with high reflectance, the cured epoxy resin several sections, above-mentioned printed chassis is silver-plated copper foil plate, above-mentioned semiconductor light-emitting-diode tube core and current-limiting resistance series connection are loaded on the circuit substrate front, the side that it is characterized in that said plastic reflective plate top frame has a rectangular slit, said printed chassis is positioned at the rectangular slit of plastic reflective plate side, perpendicular to display plane, form reflection cavity with the reflecting plate inwall, circuit substrate and top diode chip thereof and current-limiting resistance in device, have the character or the figure of required demonstration by epoxy encapsulation on positive epoxy resin surface that solidifies or the plastic reflective plate.
2,, it is characterized in that in the above-mentioned epoxy resin the mixed fluorescent dye that has according to the semiconductor planar luminescence display panel of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88202258 CN2035129U (en) | 1988-03-24 | 1988-03-24 | Semiconductive light emitting display board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88202258 CN2035129U (en) | 1988-03-24 | 1988-03-24 | Semiconductive light emitting display board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2035129U true CN2035129U (en) | 1989-03-29 |
Family
ID=4837292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88202258 Withdrawn CN2035129U (en) | 1988-03-24 | 1988-03-24 | Semiconductive light emitting display board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2035129U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049189C (en) * | 1993-08-23 | 2000-02-09 | 世界汽车牌照株式会社 | Number plate including luminous characters |
| CN1049188C (en) * | 1993-06-25 | 2000-02-09 | 世界汽车牌照株式会社 | Number plate including luminous character |
| WO2005076692A3 (en) * | 2004-02-05 | 2006-03-23 | Marpole International Inc | Light display structures |
-
1988
- 1988-03-24 CN CN 88202258 patent/CN2035129U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049188C (en) * | 1993-06-25 | 2000-02-09 | 世界汽车牌照株式会社 | Number plate including luminous character |
| CN1049189C (en) * | 1993-08-23 | 2000-02-09 | 世界汽车牌照株式会社 | Number plate including luminous characters |
| WO2005076692A3 (en) * | 2004-02-05 | 2006-03-23 | Marpole International Inc | Light display structures |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |