CN1023596C - Luminous writing board - Google Patents
Luminous writing board Download PDFInfo
- Publication number
- CN1023596C CN1023596C CN 92105081 CN92105081A CN1023596C CN 1023596 C CN1023596 C CN 1023596C CN 92105081 CN92105081 CN 92105081 CN 92105081 A CN92105081 A CN 92105081A CN 1023596 C CN1023596 C CN 1023596C
- Authority
- CN
- China
- Prior art keywords
- light
- tabula rasa
- emitting tablet
- transmissive film
- writing 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.)
- Expired - Fee Related
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- Drawing Aids And Blackboards (AREA)
Abstract
The present invention belongs to an optoelectronic technical field. A writing board which is new invented does not need a chalk, is sanitary and clean, and is easy to erase and write. The writing board can be used in a dark room. Light sent by a light source does incident from the side surface of a light transmission board, and generates total internal reflection in the light transmission board, and luminous characters are written by touching and pressing a light transmission film at the surface of the light transmission board. The structure of the writing board is simple. The writing board can be made into a large specification, a medium specification, a small specification, etc., and can meet different actual demands. The luminous writing board not only can present distinct characters in darkness, but also can be convenient in use, and can make teaching visual. Due to the fact that the vision of people is sensitive to the luminous characters, and therefore, the eyes of the people are difficult to fatigue, and the attention of the people is easy to centralize. The purpose that the vision can not be damaged can be achieved.
Description
The invention belongs to field of photoelectric technology.
Up to now, the board that is widely used in imparting knowledge to students is to write on the glass plate of blackboard or grinding with chalk.Produce a large amount of dusts when font is erasable, unhygienic, harmful instructor's is healthy.The magnetic force board of producing is to write out font by the effect of bar magnet and magnetic recently.Formed font is a black, and board is a white.Because white reflection is strong, the black font concentrated force on people's the vision dialogue colour table is poor, makes human eye tired easily, and the time of seeing is long influential to eyesight, therefore is unfavorable for using in teaching.Above-mentioned two kinds of boards all utilize the reflection of light intensity difference to see font clearly, when indoor light is dark, just are difficult to see clearly the font on the board.Teaching has a strong impact on student eyesight in this case.Though the teaching slide projector can be in darker aerial use, its teaching is not directly perceived, and erasable font is also difficult.
Purpose of the present invention just is to have invented the board that a kind of font can be luminous at above-mentioned weak point.This board is erasable easily, and teaching is directly perceived, and the applied environment cleaning can be in the darker indoor use of light.People's vision is to luminous font sensitivity, and the use emitting tablet light makes people's eyes indefatigability, can protect student's eyesight.Emitting tablet light also can be used as children and practises writing usefulness simultaneously, just can write out luminous font with finger on this board.
For achieving the above object, utilized the total internal reflection principle of light.As shown in Figure 1, light is from passing the side incident of tabula rasa (3).Because passing tabula rasa (3) is optically denser medium with respect to its ambient air, so light experiences total internal reflection in passing tabula rasa, can not reflect from upper and lower surface.Put one deck light-transmissive film (4) on the biography tabula rasa, it is optically denser medium that light-transmissive film (4) passes tabula rasa (3) relatively, and (its refractive index is more than or equal to the refractive index that passes tabula rasa) its outer surface is a hair side.When light-transmissive film (4) was attached to biography tabula rasa (3), the total internal reflection condition of light in passing tabula rasa was destroyed, has anaclasis to come out in the location for paste of light-transmissive film (4).Just can see that from top light-transmissive film sticks on the vestige that passes on the tabula rasa, if the vestige that presses is a word, so just can see luminous font.
Below in conjunction with description of drawings one embodiment of the present of invention.
Fig. 2 is the side elevation view of emitting tablet light.Light source (1) sends the reflection shield (2) of depending alone of adjustable light intensity light is all injected in the biography tabula rasa (3) from the side.Be placed with one deck light-transmissive film (4) at biography tabula rasa (3) and outer surface, the outer surface of this layer light-transmissive film (4) is a hair side, and inner surface is the nick ware shape hole that is honeycomb (6) or bowl-type.When the outer surface of light-transmissive film (4) was subjected to pressing, inner surface is attached to the air that passes in the tabula rasa place nick to be squeezed away, make the place of pressing produce negative pressure, thereby the vestige of the touched mistake of light-transmissive film (4) will stick on the biography tabula rasa.Inner surface at light-transmissive film also can be coated with one deck adhesive sticker body, can make light-transmissive film (4) place of being pressed stick on the biography tabula rasa equally.
Light-transmissive film (4) place of being pressed does not have anaclasis to come out, if the vestige that presses is word or figure, so just can see luminous corresponding font or figure.If light-transmissive film has color, the light that the font of writing out is sent also is coloured.If the font of writing is wiped, as long as light-transmissive film (4) and the location for paste that passes tabula rasa (3) are separated.
When biography tabula rasa (3) is installed, pass tabula rasa (3) and other thing contact position coated with protective film (5).Diaphragm (5) is a kind of biography optical media of low-refraction, and it passes tabula rasa relatively is optically thinner medium.Its effect is identical with fibre-optic outer role, is used for protecting the light that passes total internal reflection in the tabula rasa not leak outside.When writing on light-transmissive film, the used head end that presses rod is equipped with ball, and the head end of similar ball pen is so that the friction when reducing to write.
Pass tabula rasa (3) and be with pass the photosensitiveness energy rate preferably glass plate or poly (methyl methacrylate) plate make, it is flat that it requires glass plate to please both parties, the material of glass plate is even, impurity and bubble can not be contained in the inside.Light-transmissive film (4) is made of transparent rubber or plastic or other material, and it is green that light-transmissive film (4) is preferably, and makes the font green light to adapt to people's vision.At the baffle plate that passes tabula rasa (3) back black preferably, to reduce positive reflection of incident light.The light that light source (1) sends is eager to excel in whatever one does and light intensity is adjustable, and what reflection shield (2) must send light source covers, and makes light only from passing the side incident of tabula rasa (3), locates not light leak at other.
Because emitting tablet light without chalk, does not have dust, and environment can be kept clean.Because the luminous intensity of font can be regulated, therefore can be in the different indoor use of bright and dark light.If classroom red or peach curtain or ruddy light, the luminescent characters body with green forms distinct contrast so, makes the font on the emitting tablet light see more clearly.Emitting tablet light can form the teaching environment of a gracefulness in actual applications.
Claims (10)
1, a kind of emitting tablet light is characterized in that light that light source (1) sends from passing tabula rasa (3) side incident, and one deck Pasting is arranged at the light-transmissive film (4) that passes tabula rasa (3) surface.
2, emitting tablet light according to claim 1, it is characterized in that passing tabula rasa (3) is the biography optical media that makes the light experiences total internal reflection.
3, emitting tablet light according to claim 1, the refractive index that it is characterized in that light-transmissive film (4) is more than or equal to the semitransparent thin film that passes tabula rasa (3) refractive index.
4, emitting tablet light according to claim 1 is characterized in that the fixing low folding rate diaphragm (5) that tabula rasa (3) locates to be separated with the protection total internal reflection condition that passes.
5, according to claim 1 or 3 described emitting tablet lights, the outer surface that it is characterized in that light-transmissive film is a hair side.
6, according to claim 1 or 3 described emitting tablet lights, the inner surface that it is characterized in that light-transmissive film (4) have can with pass being small recessed ware shape hole or scribbling the adhesive sticker body in tabula rasa (3) stickup.
7,, it is characterized in that light-transmissive film (4) has color according to claim 1 or 3 described emitting tablet lights.
8, emitting tablet light according to claim 1 is characterized in that the light that reflection shield (2) sends light source only incides the biography tabula rasa (3) from side.
9, emitting tablet light according to claim 1 is characterized in that light source (1) luminosity can regulate.
10, emitting tablet light according to claim 1, the liner plate that it is characterized in that passing tabula rasa (3) back side is a black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92105081 CN1023596C (en) | 1992-06-26 | 1992-06-26 | Luminous writing board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92105081 CN1023596C (en) | 1992-06-26 | 1992-06-26 | Luminous writing board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1069452A CN1069452A (en) | 1993-03-03 |
| CN1023596C true CN1023596C (en) | 1994-01-26 |
Family
ID=4941170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92105081 Expired - Fee Related CN1023596C (en) | 1992-06-26 | 1992-06-26 | Luminous writing board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023596C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011006430A1 (en) * | 2009-07-14 | 2011-01-20 | Wang Qi | High-definition erasing-free writing blackboard |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104641269B (en) * | 2012-08-21 | 2020-03-06 | 张大海 | Light guide plate surface structure and application and manufacturing method thereof |
-
1992
- 1992-06-26 CN CN 92105081 patent/CN1023596C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011006430A1 (en) * | 2009-07-14 | 2011-01-20 | Wang Qi | High-definition erasing-free writing blackboard |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1069452A (en) | 1993-03-03 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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 |