CN102456294A - LED (light-emitting diode) display device - Google Patents
LED (light-emitting diode) display device Download PDFInfo
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- CN102456294A CN102456294A CN201010528517XA CN201010528517A CN102456294A CN 102456294 A CN102456294 A CN 102456294A CN 201010528517X A CN201010528517X A CN 201010528517XA CN 201010528517 A CN201010528517 A CN 201010528517A CN 102456294 A CN102456294 A CN 102456294A
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- light source
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Abstract
A LED (light-emitting diode) display device is disclosed, which comprises a light source and a light guide plate. The light guide plate is provided with a light-incoming surface and a light-outgoing surface. The light source is disposed adjacent to the light-incoming surface, and the light emitted by the light source incomes from the light-incoming surface of the light guide plate and outgoes from the light-outgoing surface of the light guide plate. A pattern formed by coating a first fluorescent powder and a pattern formed by coating a second fluorescent powder are disposed on the light-outgoing surface of the light guide plate. The colour of the light emitted by the first fluorescent powder after being excited by the light source is different from the lighting colour of the light emitted by the second fluorescent powder after being excited by the light source, so that the colours displayed by the display device are abundant.
Description
Technical field
The present invention relates to a kind of LED display device.
Background technology
(Light Emitting Diode LED) is a kind of semiconductor element that can current conversion be become the light of particular range of wavelengths to light emitting diode.Light emitting diode is so that its brightness is high, WV is low, power consumption is little, be prone to the integrated circuit coupling, drive advantages such as simple, life-span length, thereby can be used as light source and be widely used in lighting field.
Advantages such as light emitting diode is good because of the tool light quality, volume is little, environmental protection and luminescence efficiency height replace the light source of cold-cathode fluorescence lamp as various display boards gradually.General display board is made up of light source and transparent light guide plate usually, and light source is arranged on the side of LGP usually.Be formed with defective on the exiting surface of LGP destroying the total reflection of light on LGP, thereby make the position outgoing of light that light source sends from defective.Above-mentioned defective is formed plurality of patterns, thereby composition needs content displayed.Yet in this advertising panel, owing to need on LGP, make microstructure, it is fabricated into comparatively difficulty.And the color of the pattern that this advertisement plate showed is identical with the color of light source, and its display effect is comparatively single.
Summary of the invention
In view of this, be necessary to provide the LED display device of a kind of display color than horn of plenty.
A kind of LED display device, it comprises light source and LGP.Said LGP has incidence surface and exiting surface.The contiguous incidence surface setting of light source, the light that light source sent is from the incidence surface incident of LGP and from the exiting surface outgoing of LGP.The exiting surface of said LGP is provided with pattern that is formed by the coating of first fluorescent powder and the pattern that is formed by the coating of second fluorescent powder.The color of the light that said first fluorescent powder receives to be sent behind the light source activation is different from the glow color of the light that second fluorescent powder receives to be sent behind the light source activation.
Compared with prior art, the present invention is coated with pattern that forms and the pattern that is formed by the coating of second fluorescent powder through the exiting surface setting at LGP by first fluorescent powder.Since this first fluorescent powder by light source activation after the color of emitted light be different from second fluorescent powder by light source activation after the color of emitted light, thereby the color rich that this display device is shown.
With reference to the accompanying drawings, in conjunction with specific embodiment the present invention is done further description.
Description of drawings
Fig. 1 is the structural representation of the LED display device in the first embodiment of the invention.
Fig. 2 is the structural representation of the LED display device in the second embodiment of the invention.
The main element symbol description
LED display device 100,200
Light source 110,210
First kind of light source 211
Second kind of light source 212
Substrate 113,213
LGP 120,220
Incidence surface 121,221
Exiting surface 122,222
First fluorescent powder 130,230
Second fluorescent powder 140,240
The 3rd fluorescent powder 150
Embodiment
As shown in Figure 1, a kind of LED display device 100 comprises light source 110 and LGP 120.
Said light source 110 is light emitting diode or laser diode.Said light emitting diode is arranged in array shape, and it is arranged on the surface of a substrate 113.This light source 110 provides corresponding illuminating ray for display device.
Said LGP 120 is processed by transparent material, and its manufacturing materials comprises polymethylmethacrylate (PMMA), polycarbonate (PC), glass (glass) and epoxy resin (epoxy) etc.Said LGP 120 has an incidence surface 121 and an exiting surface 122.Said light source 110 contiguous incidence surfaces 121 are provided with, and the light that light source 110 is sent is from incidence surface 121 incidents of LGP 120, then from exiting surface 122 outgoing of LGP 120.Be coated with monogram A that forms by first fluorescent powder 130 and the monogram B that forms by second fluorescent powder 140 on the LGP 120.Said first fluorescent powder 130 receives that light source 110 emits beam excites and sends the light of first kind of color, and said second fluorescent powder 140 receives that light source 110 emits beam excites and send the light of second kind of color.
In the present embodiment, said light source 110 is a blue light-emitting diode, and the wavelength coverage of the light that it sends is that 435nm is to 475nm.Correspondingly, said first fluorescent powder 130 is green light fluorescent powder, and it receives the exciting of blue light that light source 110 sends and sends the light in the green wavelength.Said second fluorescent powder 140 is red light fluorescent powder, and it receives the exciting of blue light that light source 110 sends and sends the light in the red light wavelength scope.When light source 110 is opened, said first fluorescent powder 130 will send green glow and form the alphabetical A of a green, and said second fluorescent powder 140 will send ruddiness and form the letter b of a redness.It is thus clear that in above-mentioned LED display device 100, because different pattern various colors capable of using shows that its Show Color is than horn of plenty, display effect is better.In addition, because first fluorescent powder 130 and second fluorescent powder 140 are methods through coating is formed on the exiting surface of LGP 120.According to the needs of displaying contents, said first fluorescent powder 130 and second fluorescent powder 140 can be removed effectively, simultaneously, fluorescent powder are applied into new pattern, to adapt to the needs of demonstration.Described displaying contents can be Chinese character, letter or its combination in any, also can be the combination of pattern or pattern and any character.
As required; Apply the opaque material of one deck in the place except that the dispensing area of first fluorescent powder 130 and second fluorescent powder 140; This opaque material can block with the light of exterior domain institute outgoing removing first fluorescent powder 130 and second fluorescent powder 140, makes it can not have influence on the pattern that first fluorescent powder 130 and second fluorescent powder 140 are shown.
As required, said light source 110 also can adopt blue coloured light or ultraviolet light emitting diode, and its luminous wavelength is less than 400nm.Said first fluorescent powder 130 receives purple light or ultraviolet exciting and sends green glow and form green alphabetical A, and second fluorescent powder 140 receives purple light or ultraviolet exciting and sends ruddiness and form red letter b.
As required, in above-mentioned LED display device 100, the exiting surface of LGP 120 also comprises and is coated with the monogram C that is made up of the 3rd fluorescent powder 150.The 3rd fluorescent powder 150 is gold-tinted fluorescent powder, and it receives the exciting of blue light that light source 110 sends and sends the light in the yellow wavelengths scope.When light source 110 is opened, also will show the letter C of a yellow on the said LGP.
In the above-described embodiments, said first fluorescent powder and second fluorescent powder are excited by the light of identical wavelength and are luminous.In fact, said first fluorescent powder and second fluorescent powder also can be excited by the light in the different wavelength range and is luminous.
See also Fig. 2, second embodiment of the invention provides a kind of LED display device 200, and this LED display device 200 comprises light source 210 and LGP 220.
Said light source 210 comprises first kind of light source 211 and second kind of light source 212.Said first kind of light source 211 and second kind of light source 212 are arranged on the substrate 213 at interval.The wavelength of the light that the wavelength of the light that said first kind of light source 211 sent is sent less than said second kind of light source 212.In the present embodiment, said first kind of light source 211 and second kind of light source 212 are light emitting diode or laser diode, and both are staggered and form array shape.Said first kind of light source 211 sends the light in the blue wavelength region, and its emission wavelength is that 435nm is to 475nm.Said second kind of light source 212 sends the light in the green wavelength scope, and its emission wavelength is that 500nm is to 560nm.The opening and closing of said first kind of light source 211 and second kind of light source 212 can be controlled respectively, thereby make first kind of light source 211 and second kind of light source 212 can distinguish independent unlatching or common the unlatching.
Said LGP 220 has an incidence surface 221 and an exiting surface 222.Said light source 210 contiguous incidence surfaces 221 are provided with, and the light that light source 210 is sent is from incidence surface 221 incidents of LGP 220, then from exiting surface 222 outgoing of LGP 220.Be coated with monogram A that forms by first fluorescent powder 230 and the monogram B that forms by second fluorescent powder 240 on the LGP 220.Different with first embodiment is, said first fluorescent powder 230 receives the exciting of light that first kind of light source 211 send and sends the light of first kind of color.Said second fluorescent powder 240 receives the exciting of light that second kind of light source 212 send and sends the light of second kind of color.
In the present embodiment, said first fluorescent powder 230 is green light fluorescent powder, and it receives the exciting of blue ray that first kind of light source 211 send and sends the light in the green wavelength.Said second fluorescent powder 240 is red light fluorescent powder, and it excites except the blue light light that receives first kind of light source 211 and send and sends the ruddiness, also receives the exciting of green glow light that second kind of light source 212 send and sends ruddiness.When having only first kind of light source 211 to open, said first fluorescent powder 230 and second fluorescent powder 240 all can receive exciting of blue light and luminous.Wherein, first fluorescent powder 230 will green light and is formed the monogram A of a green, and second fluorescent powder 240 will glow and form the monogram B of a redness.When having only second kind of light source 212 to open, because second kind of light source 212 sends green glow, said first fluorescent powder 230 can not receive exciting of second kind of light source 212 and luminous.Said second fluorescent powder 240 will receive the exciting of green glow that second kind of light source 212 send and send ruddiness.At this moment, on this LED display device 200, only show the monogram B of a redness.Thus it is clear that,, on this LED display device 200, can show different patterns through controlling the opening and closing of first kind of light source 211 and second kind of light source 212 respectively.The LED display device 200 of present embodiment has the display color abundant effects equally.Simultaneously, because first fluorescent powder 230 and second fluorescent powder 240 are methods through coating is formed on the exiting surface of LGP 220.According to the needs of displaying contents, said first fluorescent powder 230 and second fluorescent powder 240 can be removed effectively, simultaneously, fluorescent powder are applied into new pattern, to adapt to the needs of demonstration.Described displaying contents can be Chinese character, letter or its combination in any, also can be the combination of pattern or pattern and any character.
Be noted that above-mentioned embodiment is merely preferred embodiments of the present invention, those skilled in the art also can do other variation in spirit of the present invention.These all should be included within the present invention's scope required for protection according to the variation that the present invention's spirit is done.
Claims (10)
1. LED display device; It comprises light source and LGP; Said LGP has incidence surface and exiting surface; The contiguous incidence surface setting of light source, the light that light source sent is characterized in that from the incidence surface incident of LGP and from the exiting surface outgoing of LGP; The exiting surface of said LGP is provided with pattern that is formed by first fluorescent powder coating and the pattern that is formed by the coating of second fluorescent powder, and the color of the light that said first fluorescent powder receives to be sent behind the light source activation is different from the glow color of the light that second fluorescent powder receives to be sent behind the light source activation.
2. LED display device as claimed in claim 1 is characterized in that, said light source is light emitting diode or laser diode.
3. LED display device as claimed in claim 1 is characterized in that, said first fluorescent powder is excited by the light in first wavelength coverage and luminous, and said second fluorescent powder is excited by the light in second wavelength coverage and luminous.
4. LED display device as claimed in claim 3 is characterized in that, said first wavelength is identical with the numerical value of second wavelength.
5. LED display device as claimed in claim 4 is characterized in that, the wavelength coverage of the said first wavelength light and the second wavelength light is that 435nm is to 475nm.
6. LED display device as claimed in claim 4 is characterized in that, the wavelength of the said first wavelength light and the second wavelength light is less than 400nm.
7. LED display device as claimed in claim 3 is characterized in that, said first wavelength is less than second wavelength.
8. LED display device as claimed in claim 7 is characterized in that, the wavelength coverage of the light of said first wavelength be 435nm to 475nm, the wavelength coverage of the light of said second wavelength is that 500nm is to 560nm.
9. like claim 3 or 7 described LED display device; It is characterized in that; Said light source comprises first kind of light source and second kind of light source; The emission wavelength of said first kind of light source is positioned at the wavelength coverage of the first wavelength light, and the emission wavelength of said second kind of light source is positioned at the wavelength coverage of the second wavelength light.
10. LED display device as claimed in claim 9 is characterized in that, said first kind of light source and second kind of light source opening and closing respectively show different patterns in order to control LED display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010528517XA CN102456294A (en) | 2010-11-02 | 2010-11-02 | LED (light-emitting diode) display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010528517XA CN102456294A (en) | 2010-11-02 | 2010-11-02 | LED (light-emitting diode) display device |
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| Publication Number | Publication Date |
|---|---|
| CN102456294A true CN102456294A (en) | 2012-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201010528517XA Pending CN102456294A (en) | 2010-11-02 | 2010-11-02 | LED (light-emitting diode) display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112669728A (en) * | 2020-12-31 | 2021-04-16 | 厦门大学 | Transmission type display implementation method based on laser excitation fluorescent powder |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1495921A (en) * | 1996-07-29 | 2004-05-12 | ���ǻ�ѧ��ҵ��ʽ���� | Luminous device |
| CN101315853A (en) * | 2007-05-30 | 2008-12-03 | 夏普株式会社 | Method of manufacturing phosphor, light-emitting device, and image display apparatus |
| CN101749554A (en) * | 2008-12-08 | 2010-06-23 | 厦门市光莆电子有限公司 | Energy-saving ultra-thin LED plane display lamp |
-
2010
- 2010-11-02 CN CN201010528517XA patent/CN102456294A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1495921A (en) * | 1996-07-29 | 2004-05-12 | ���ǻ�ѧ��ҵ��ʽ���� | Luminous device |
| CN101315853A (en) * | 2007-05-30 | 2008-12-03 | 夏普株式会社 | Method of manufacturing phosphor, light-emitting device, and image display apparatus |
| CN101749554A (en) * | 2008-12-08 | 2010-06-23 | 厦门市光莆电子有限公司 | Energy-saving ultra-thin LED plane display lamp |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112669728A (en) * | 2020-12-31 | 2021-04-16 | 厦门大学 | Transmission type display implementation method based on laser excitation fluorescent powder |
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Application publication date: 20120516 |