CN1069452A - Emitting tablet light - Google Patents
Emitting tablet light Download PDFInfo
- Publication number
- CN1069452A CN1069452A CN 92105081 CN92105081A CN1069452A CN 1069452 A CN1069452 A CN 1069452A CN 92105081 CN92105081 CN 92105081 CN 92105081 A CN92105081 A CN 92105081A CN 1069452 A CN1069452 A CN 1069452A
- Authority
- CN
- China
- Prior art keywords
- light
- tabula rasa
- transmissive film
- emitting tablet
- emitting
- 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.)
- Granted
Links
Images
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The invention belongs to field of photoelectric technology.Neoteric this board is without chalk, hygiene, erasable easily, and can be in darker indoor use.The light that it is sent by light source is from passing the side incident of tabula rasa, and in passing tabula rasa experiences total internal reflection, write out luminous font by pressing the light-transmissive film that passes the tabula rasa surface again.It is simple in structure, can be made into the large, medium and small different size of Denging, can satisfy different actual needs.This emitting tablet light not only can be seen font clearly darkling, and easy to use, and teaching is directly perceived.Because people's vision to luminous font sensitivity, therefore makes people's eyes indefatigability, notice is easy to concentrate.And can reach the purpose that does not harm one's eyes.
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 use in darker chamber, 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 the outer surface that passes tabula rasa (3), 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, light-transmissive film (4) place of being pressed is sticked on pass on the tabula rasa.
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 passing tabula rasa (3), pass tabula rasa (3) and other thing contact position coated with protective film (5) by dress.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.The baffle plate that passes tabula rasa (3) back preferably black be black, 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. emitting tablet light; comprise light source (1), reflection shield (2), pass tabula rasa (3), light-transmissive film (4), diaphragm (5), it is characterized in that making the biography tabula rasa (3) of light experiences total internal reflection and one deck light-transmissive film (4) more than or equal to biography tabula rasa (3) refractive index.
2. emitting tablet light according to claim 1, it is characterized in that passing tabula rasa (3) is light transmission glass plate or poly (methyl methacrylate) plate preferably.
3. emitting tablet light according to claim 1, the material that it is characterized in that light-transmissive film (4) is transparent rubber or transparent plastic.
4. emitting tablet light according to claim 1 is characterized in that there is incident light source (1) side that passes tabula rasa (3).
5. emitting tablet light according to claim 4 is characterized in that the light that light source (1) is sent all incides the reflection shield (2) that passes in the tabula rasa from the side.
6. emitting tablet light according to claim 1 is characterized in that passing the low-refraction diaphragm (5) that tabula rasa (3) is pasted with the protection total internal reflection condition.
7. according to claim 1 or 3 described emitting tablet lights, it is characterized in that the outer surface of light-transmissive film (4) is a hair side.
8. 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.
9. according to claim 1 or 3 described emitting tablet lights, it is characterized in that light-transmissive film (4) has color.
10. emitting tablet light according to claim 9, the color that it is characterized in that light-transmissive film are green.
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 true CN1069452A (en) | 1993-03-03 |
| CN1023596C 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 |
|---|---|---|---|---|
| CN104641269A (en) * | 2012-08-21 | 2015-05-20 | 张大海 | Surface structure for light guide plate and application and manufacturing method therefor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201483981U (en) * | 2009-07-14 | 2010-05-26 | 王�琦 | High-resolution erasing-free writing blackboard |
-
1992
- 1992-06-26 CN CN 92105081 patent/CN1023596C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104641269A (en) * | 2012-08-21 | 2015-05-20 | 张大海 | Surface structure for light guide plate and application and manufacturing method therefor |
| CN104641269B (en) * | 2012-08-21 | 2020-03-06 | 张大海 | Light guide plate surface structure and application and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1023596C (en) | 1994-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8075982B2 (en) | Device for making illuminated markings | |
| CN201483977U (en) | Multifunctional writing board | |
| CN1023596C (en) | Luminous writing board | |
| CN207105770U (en) | A kind of wear-resisting sticking film for mobile phone | |
| CN2123435U (en) | Luminous writing board | |
| CN208604052U (en) | A kind of blue light barrier scratch-resistant protective film | |
| CN212051209U (en) | Prevent eyeshield type protection film for touch-sensitive screen of blue light | |
| CN202650319U (en) | LED calligraphy and painting imitating device | |
| CN201918048U (en) | Light emitting diode (LED) emitting writing board | |
| CN203937252U (en) | A kind of anti-blue light liquid crystal display panel glass glass protecting label | |
| CN201064279Y (en) | Pupil table for training handwriting | |
| CN201390059Y (en) | Dust-free vision-aid blackboard | |
| CN208984902U (en) | A kind of uniform color-changing lens of discoloration | |
| CN201069473Y (en) | LCD screen eye protection board with reflection resistance capability | |
| CN211086911U (en) | Bionic flexible micro-nano optical eye-protecting image screen | |
| CN204143410U (en) | Touch device for filtering blue light and anti-reflection touch device | |
| CN219156806U (en) | Anti-infrared glasses pad pasting | |
| CN210528842U (en) | Blue light-resistant eye-protecting optical protective film | |
| JP2012518265A (en) | LED with suction plate | |
| CN207904170U (en) | A kind of OCA optical cements for electronic product | |
| CN211786509U (en) | LED backlight source fixing device with anti-scattering structure | |
| CN211086908U (en) | Flexible touch interactive bionic micro-nano optical image screen and image system | |
| CN213601197U (en) | Writing pad with maze toy | |
| CN221281379U (en) | Electronic paper blackboard equipment | |
| CN2515694Y (en) | Double protecting glasses |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |