CN104375369B - Teaching board book optical projection system based on automatically controlled glass - Google Patents
Teaching board book optical projection system based on automatically controlled glass Download PDFInfo
- Publication number
- CN104375369B CN104375369B CN201410727112.7A CN201410727112A CN104375369B CN 104375369 B CN104375369 B CN 104375369B CN 201410727112 A CN201410727112 A CN 201410727112A CN 104375369 B CN104375369 B CN 104375369B
- Authority
- CN
- China
- Prior art keywords
- projection
- plate
- liquid crystal
- blackboard
- glass
- 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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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
The invention discloses a kind of teaching board book optical projection system based on automatically controlled glass, including writing on the blackboard projection plate (1), background mechanism and projector (2), described background mechanism is positioned at the rear side of writing on the blackboard projection plate (1) and presses close to its phase, described writing on the blackboard projection plate (1) is made of clear material, described background mechanism includes fixed black background board (3) and projection screen plate (4), described projection screen plate (4) is positioned between fixed black background board (3) and writing on the blackboard projection plate (1), projection screen plate (4) is electrically-controlled liquid crystal photo chromic glass, electrically-controlled liquid crystal photo chromic glass is transparent shape when energising, during power-off the most white, described projector (2) is projected on the electrically-controlled liquid crystal photo chromic glass of power-off when projection.The present invention can increase effective write area, can change the position of electrically-controlled liquid crystal photo chromic glass or outage area to change projected position, make the content that can see projection per capita clearly of different angles.
Description
Technical field
The present invention relates to teaching aid field, a kind of teaching board book optical projection system based on automatically controlled glass.
Background technology
Blackboard for instructor's writing on the blackboard is that classroom is essential, and for the teaching of modernization, multimedia overhead projector is certainly
So also seem indispensable.All have employed, in a lot of classrooms, the teaching equipment that blackboard is combined with projection screen, teacher's plate should be met
The demand of book, can utilize again projector equipment to carry out projection teaching.In prior art, projector equipment includes projector and projection screen,
Projection screen and blackboard are typically with being located on the body of wall before classroom, but owing to wall area is limited, projection screen is often deposited with blackboard
In overlapping part.Therefore there is techniques below problem in the writing on the blackboard projector equipment of prior art:
1, projection screen and blackboard overlapping portion branch shield portions blackboard, some projection screens have even covered almost half blackboard,
Greatly reduce effective write area of blackboard；
2, the installation site of prior art projection screen is changeless, if projection screen is arranged on the left side in classroom, right side is same
Association is affected, and in like manner, if projection screen is arranged on the right side in classroom, the classmate's association in left side is affected by certain.If
Projection screen is arranged in the middle of classroom, not only can affect the viewing of both sides classmate, also can affect teacher's writing on the blackboard；
3, in order to increase effective write area of blackboard, need to be turned off by projector in the middle of at school, projection screen risen,
Need projection once more to fall, not only bother, and waste time in classroom；
4, after writing on whole blackboard, if desired multimedia projector auxiliary, now projection screen can block blackboard part powder
Writing on the blackboard, causes certain inconvenience, to again use these chalk writings, needs again to turn off, by projection screen projector
Rise.
Summary of the invention
In view of this, the blackboard effective write area of minimizing overlapping with projection screen etc. that the present invention is directed to the existence of above-mentioned prior art is asked
Topic, it is provided that based on automatically controlled glass teaching board book optical projection system that a kind of effective write area is big, projected position is adjustable.
The technical solution of the present invention is to provide teaching board book based on the automatically controlled glass projection of a kind of following structure
System, including writing on the blackboard projection plate, background mechanism and projector, described background mechanism be positioned at writing on the blackboard projection plate rear side and and its
Pressing close to mutually, described writing on the blackboard projection plate is made of clear material, and described background mechanism includes fixed black background board and projection screen
Plate, described projection screen plate is between black background plate and writing on the blackboard projection plate, and projection screen plate is by polylith electrically-controlled liquid crystal variable color glass
Glass plate is formed by connecting, and electrically-controlled liquid crystal photo chromic glass plate is transparent shape when energising, the most white during power-off, every piece of liquid crystal color-changing
Glass plate is powered by corresponding circuit, to the corresponding liquid crystal color-changing glass plate power-off of projected position to form view field, and institute
The projector stated is in described view field.
Using above structure, the present invention compared with prior art, has the advantage that the employing present invention, due to background mechanism
Being close on the writing on the blackboard projection plate that is made of clear material, background when fixed black background board uses as writing on the blackboard, in writing on the blackboard
The respective regions writing on the blackboard of projection plate, its black background can allow the people paid attention to the class see the content of writing on the blackboard clearly, and electrically-controlled liquid crystal photo chromic glass
During power-off white, as projection use time background, project on this region, it is possible to clearly show that the content of projection, nothing
Then being energized it when need to project so that it is transparent shape, fixed black background board the most thereafter is just all as writing on the blackboard projection plate
Background.The present invention can increase effective write area, and position or the outage area that can change electrically-controlled liquid crystal photo chromic glass change
Become projected position, make the content that can see projection per capita clearly of different angles.
As preferably, described polylith liquid crystal color-changing glass plate is provided with light-sensitive element, and described projector is provided with photosensitive
The lasing light emitter that element matches, the power supply circuits of described light-sensitive element corresponding liquid crystal color-changing glass plate connect.Adjust and throw
During shadow position, projector slides along rail plate, and lasing light emitter touches the corresponding light-sensitive element of liquid crystal color-changing glass plate, then should
Some liquid crystal color-changing glass plate power-off near liquid crystal color-changing glass plate, form new view field.
As preferably, the projection lens of projector is provided with lens cap, when suspending projection or terminate projection, hides with lens cap
Gear projection lens, lasing light emitter touches light-sensitive element, light-sensitive element control the electrically-controlled liquid crystal photo chromic glass to power-off and be energized.This
Sample avoids the worry of prior art folding and unfolding projection screen, and former view field just becomes the region that can write writing on the blackboard, effectively utilizes
The write area of writing on the blackboard projection plate.
As preferably, when starting projection or continuing projection, open lens cap, lasing light emitter touch light-sensitive element, photosensitive unit
Part controls electrically-controlled liquid crystal photo chromic glass homolographic projection region power-off.It is easy to the operating mode switching suspending projection with continuing projection.
As preferably, described in make the transparent material of writing on the blackboard projection plate and can realize the diffuse-reflectance of light.So that different angles
Spectators can see the content of writing on the blackboard and projection clearly.
Accompanying drawing explanation
Fig. 1 is the structural representation (the first state) of the present invention；
Fig. 2 is the structural representation (the second state) of the present invention；
Fig. 3 is the structural representation of projector and rail plate；
As it can be seen, 1, writing on the blackboard projection plate, 2, projector, 2.1, projection lens, 2.2, lens cap, 3, fixed black
Background board, 4, projection screen plate, 4.1, liquid crystal color-changing glass plate, 5, rail plate, 6, light-sensitive element, 7, lasing light emitter.
Detailed description of the invention
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but the present invention is not restricted to these enforcement
Example.
The present invention contains any replacement, amendment, equivalent method and scheme made in the spirit and scope of the present invention.In order to
Make the public that the present invention to be had to understand thoroughly, in present invention below preferred embodiment, concrete details is described in detail, and right
The description not having these details for those skilled in the art can also understand the present invention completely.Additionally, in the accompanying drawing of the present invention
For the needs illustrated, the most accurately it is not drawn to scale, is explained at this.
As shown in Figure 1,2 and 3, a kind of based on automatically controlled glass the teaching board book optical projection system of the present invention, including writing on the blackboard
Projection plate 1, background mechanism and projector 2, described background mechanism is positioned at the rear side of writing on the blackboard projection plate 1 and presses close to its phase,
Described writing on the blackboard projection plate 1 is made of clear material, and described background mechanism includes fixed black background board 3 and projection screen plate 4,
Described projection screen plate 4 is between fixed black background board 3 and writing on the blackboard projection plate 1, and projection screen plate 4 is by the automatically controlled liquid of polylith
Brilliant photo chromic glass plate is formed by connecting, and electrically-controlled liquid crystal photo chromic glass is transparent shape when energising, the most white during power-off, every block of liquid
Brilliant photo chromic glass plate 4.1 is powered by corresponding circuit, to corresponding liquid crystal color-changing glass plate 4.1 power-off of projected position with shape
Becoming view field, described projector 2 is projected on described view field.
Based on above-mentioned teaching board book optical projection system based on automatically controlled glass, teaching board book based on automatically controlled glass can be formed and throw
The control method of shadow system, the following structure qualification for teaching board book optical projection system based on automatically controlled glass and user
Method all can be as the further restriction to described control method.
It is to be noted that " transparent " of " described writing on the blackboard projection plate 1 is made of clear material " is nisi transparent, bag
Include the states such as translucent, with spectators through seeing font clearly for requiring, arrange its transparency, such as, after frosted, it is saturating
Lightness can reduce, and the diffuse-reflectance after frosted can make human eye see more clearly.
Electrically-controlled liquid crystal photo chromic glass is also electronic-control dimming glass, and by liquid crystal film by the way of High Temperature High Pressure, sandwich package forms
High-tech photoelectric glass product, whether user can control the arrangement of liquid crystal molecule, thus reach by the energising of electric current
To the final purpose controlling glass transparent and opaque state.Liquid crystal molecule is arranged in a linear in the energized state, at this moment liquid crystal
Glass transmission and transparent；During off-position, liquid crystal molecule is scattering state and white, at this time liquid crystal film printing opacity but impermeable
Bright.
As illustrated in fig. 1 and 2, respectively illustrating the structure under two kinds of different conditions of the present invention, Fig. 1 is that projection screen plate is in power-off
Projection state, Fig. 2 is that projection screen plate is in energising pellucidity.Specific as follows:
Described polylith liquid crystal color-changing glass plate 4.1 is provided with light-sensitive element 6 (can be arranged to one_to_one corresponding, it is possible to have choosing
Arrange with selecting), described projector 2 is provided with the lasing light emitter 7 matched with light-sensitive element 6, described light-sensitive element 6 with
The power supply circuits of its corresponding liquid crystal color-changing glass plate 4.1 connect.When adjusting projected position, projector slides along rail plate,
Lasing light emitter touches the corresponding light-sensitive element of liquid crystal color-changing glass plate, the then some liquid crystal color-changing glass near this liquid crystal color-changing glass plate
Glass plate power-off (centered by that liquid crystal color-changing glass plate of lasing light emitter alignment), forms new view field's (these features
Can be as a part for control method).
As it is shown on figure 3, be provided with lens cap 2.1 on the projection lens of projector 2, when suspending projection or terminate projection, use
Lens cap 2.1 blocks projection lens, and lasing light emitter 7 touches light-sensitive element 6, light-sensitive element 6 control the automatically controlled liquid to power-off
Brilliant photo chromic glass energising；
When starting projection or continuing projection, open lens cap 2.1, lasing light emitter 7 touch light-sensitive element 6, light-sensitive element 6
Control electrically-controlled liquid crystal photo chromic glass homolographic projection region power-off.
The described transparent material making writing on the blackboard projection plate 1 can realize the diffuse-reflectance of light.
It is easy to use that " lens cap blocks projection lens " is intended merely in classroom or teaching process, is not off projector
Power supply, after end also need close projector power supply.
Owing to the color of the white letter written with chalk on writing on the blackboard projection plate is white, consistent with white background, therefore on writing on the blackboard projection plate
The white chalk of optional position does not the most affect drop shadow effect, when i.e. projecting, is not required to wipe the white letter written with chalk of view field, throws
After shadow disappears, white letter written with chalk can be continuing with.
The present invention also has prior art and does not has the advantage that: use ground glass or frosted lucite in dampness
Under do not affect the writing effect of chalk, wet towel therefore can be used to regard blackboard eraser, it is to avoid dust is to user pulmonary
Infringement.
Below only preferred embodiment of the present invention is described, but is not to be construed as limitations on claims.The present invention
Being not only limited to above example, its concrete structure allows to change.In a word, all protections in independent claims of the present invention
In the range of the various changes made the most within the scope of the present invention.
Claims (4)
- null1. a teaching board book optical projection system based on automatically controlled glass，It is characterized in that: include writing on the blackboard projection plate (1)、Background mechanism and projector (2)，Described background mechanism is positioned at the rear side of writing on the blackboard projection plate (1) and presses close to its phase，Described writing on the blackboard projection plate (1) is made of clear material，Described background mechanism includes fixed black background board (3) and projection screen plate (4)，Described projection screen plate (4) is positioned between fixed black background board (3) and writing on the blackboard projection plate (1)，Projection screen plate (4) is formed by connecting by polylith electrically-controlled liquid crystal photo chromic glass plate (4.1)，Electrically-controlled liquid crystal photo chromic glass is transparent shape when energising，During power-off the most white，Every piece of liquid crystal color-changing glass plate (4.1) is powered by corresponding circuit，To corresponding liquid crystal color-changing glass plate (4.1) power-off of projected position to form view field，Described projector (2) is projected on described view field；Described polylith liquid crystal color-changing glass plate (4.1) is provided with light-sensitive element (6), described projector (2) is provided with the lasing light emitter (7) matched with light-sensitive element (6), and the power supply circuits of described light-sensitive element (6) corresponding liquid crystal color-changing glass plate (4.1) connect.
- Teaching board book optical projection system based on automatically controlled glass the most according to claim 1, it is characterized in that: on the projection lens of projector (2), be provided with lens cap (2.1), when suspending projection or terminate projection, projection lens is blocked with lens cap (2.1), lasing light emitter (7) touches light-sensitive element (6), light-sensitive element (6) control the electrically-controlled liquid crystal photo chromic glass to power-off and be energized.
- Teaching board book optical projection system based on automatically controlled glass the most according to claim 2, it is characterized in that: when starting projection or continuing projection, open lens cap (2.1), being touched light-sensitive element (6) by lasing light emitter (7), light-sensitive element (6) controls electrically-controlled liquid crystal photo chromic glass homolographic projection region power-off.
- Teaching board book optical projection system based on automatically controlled glass the most according to claim 1 and 2, it is characterised in that the transparent material making writing on the blackboard projection plate (1) described in: can realize the diffuse-reflectance of light.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410727112.7A CN104375369B (en) | 2014-12-03 | 2014-12-03 | Teaching board book optical projection system based on automatically controlled glass |
| CN201610068324.8A CN105785697B (en) | 2014-12-03 | 2014-12-03 | Writing on the blackboard optical projection system based on automatically controlled glass |
| CN201610068325.2A CN105549316B (en) | 2014-12-03 | 2014-12-03 | Teaching board book projecting method based on automatically controlled glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410727112.7A CN104375369B (en) | 2014-12-03 | 2014-12-03 | Teaching board book optical projection system based on automatically controlled glass |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610068324.8A Division CN105785697B (en) | 2014-12-03 | 2014-12-03 | Writing on the blackboard optical projection system based on automatically controlled glass |
| CN201610068325.2A Division CN105549316B (en) | 2014-12-03 | 2014-12-03 | Teaching board book projecting method based on automatically controlled glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104375369A CN104375369A (en) | 2015-02-25 |
| CN104375369B true CN104375369B (en) | 2016-08-24 |
Family
ID=52554382
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610068325.2A Expired - Fee Related CN105549316B (en) | 2014-12-03 | 2014-12-03 | Teaching board book projecting method based on automatically controlled glass |
| CN201410727112.7A Expired - Fee Related CN104375369B (en) | 2014-12-03 | 2014-12-03 | Teaching board book optical projection system based on automatically controlled glass |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610068325.2A Expired - Fee Related CN105549316B (en) | 2014-12-03 | 2014-12-03 | Teaching board book projecting method based on automatically controlled glass |
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| Country | Link |
|---|---|
| CN (2) | CN105549316B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105549316A (en) * | 2014-12-03 | 2016-05-04 | 中国计量学院 | Power-driven glass based blackboard writing projection method for teaching |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109166358A (en) * | 2018-09-25 | 2019-01-08 | 上海优谦智能科技有限公司 | A kind of multi-modal tutoring system based on Internet of Things |
| CN114371592A (en) * | 2022-02-14 | 2022-04-19 | 四川众森同越科技有限公司 | Teaching demonstration integrated machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2710948Y (en) * | 2004-06-25 | 2005-07-20 | 邓玉阁 | Automatic color-changing glass wind-screen of automobile |
| CN200992070Y (en) * | 2006-12-15 | 2007-12-19 | 苗家远 | Liquid crystal projection blackboard |
| CN202911381U (en) * | 2012-12-03 | 2013-05-01 | 佳木斯大学 | Teaching blackboard for higher mathematics |
| CN203786419U (en) * | 2014-04-23 | 2014-08-20 | 量子通信科技股份（香港）有限公司 | Color-changing sunglasses based on liquid crystal |
| CN105549316B (en) * | 2014-12-03 | 2017-08-11 | 中国计量学院 | Teaching board book projecting method based on automatically controlled glass |
| CN204215137U (en) * | 2014-12-03 | 2015-03-18 | 中国计量学院 | A kind of teaching board book optical projection system based on automatically controlled glass |
-
2014
- 2014-12-03 CN CN201610068325.2A patent/CN105549316B/en not_active Expired - Fee Related
- 2014-12-03 CN CN201410727112.7A patent/CN104375369B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105549316A (en) * | 2014-12-03 | 2016-05-04 | 中国计量学院 | Power-driven glass based blackboard writing projection method for teaching |
| CN105549316B (en) * | 2014-12-03 | 2017-08-11 | 中国计量学院 | Teaching board book projecting method based on automatically controlled glass |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105549316A (en) | 2016-05-04 |
| CN105549316B (en) | 2017-08-11 |
| CN104375369A (en) | 2015-02-25 |
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Inventor after: Zhao Mingyan Inventor after: Zhi Hang Inventor before: Zhao Mingyan |
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