CN104375369A - Blackboard writing projection system based on electric-control glass and used for teaching - Google Patents
Blackboard writing projection system based on electric-control glass and used for teaching Download PDFInfo
- Publication number
- CN104375369A CN104375369A CN201410727112.7A CN201410727112A CN104375369A CN 104375369 A CN104375369 A CN 104375369A CN 201410727112 A CN201410727112 A CN 201410727112A CN 104375369 A CN104375369 A CN 104375369A
- Authority
- CN
- China
- Prior art keywords
- projection
- liquid crystal
- plate
- glass
- blackboard
- 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
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 blackboard writing projection system based on electric-control glass and used for teaching. The blackboard writing projection system comprises a blackboard writing projection board (1), a background mechanism and a projector (2), the projection mechanism is positioned on the rear side of the blackboard writing projection board (1) and is close to the blackboard writing projection board (1), the blackboard writing projection board (1) is made by a transparent material, the background mechanism comprises a fixed black background board (3) and a projection screen board (4), the projection screen board (4) is positioned between the fixed black background board (3) and the blackboard writing projection board (1) and is electric-control liquid crystal photochromic glass which is transparent when being electrified and white when being powered off, and the projector (2) projects on the electric-control liquid crystal photochromic glass which is powered off during projection. By the blackboard writing projection system, effective writing area can be increased, and projection position can be changed by changing position of the electric-control liquid crystal photochromic glass or power-off area, so that people from different angles can see projection content clearly.
Description
Technical field
The present invention relates to teaching aid field, specifically 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 institute is requisite, and for modern teaching, multimedia overhead projector also seems indispensable naturally.All have employed the teaching equipment that blackboard is combined with projection screen in a lot of classroom, the demand of teacher's writing on the blackboard should be met, projector equipment can be utilized again to carry out projection teaching.In prior art, projector equipment comprises projector and projection screen, projection screen and blackboard generally with on the body of wall being located at before classroom, but due to wall area limited, often there is overlapping part in projection screen and blackboard.Therefore there is following technical matters 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 classmate's 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 subject to certain impact.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, needing at school, projector to be turned off, projection screen is risen, needing projection once more to fall, not only bother, and waste time in classroom;
4, after writing on whole blackboard, if desired multimedia projector is assisted, and now projection screen can block blackboard part chalk writing, causes certain inconvenience, to again use these chalk writings, needing again projector to turn off, being risen by projection screen.
Summary of the invention
In view of this, the present invention is directed to the blackboard that above-mentioned prior art exists and overlappingly with projection screen reduce the problems such as effective write area, provide that a kind of effective write area is large, projected position is adjustable based on automatically controlled glass teaching board book optical projection system.
Technical solution of the present invention is, a kind of teaching board book optical projection system based on automatically controlled glass of following structure is provided, comprise writing on the blackboard projection plate, background mechanism and projector, described background mechanism is positioned at the rear side of writing on the blackboard projection plate and presses close to mutually with it, described writing on the blackboard projection plate is made up of transparent material, described background mechanism comprises fixed black background board and projection screen plate, described projection screen plate is between black background plate and writing on the blackboard projection plate, projection screen plate is formed by connecting by polylith electrically-controlled liquid crystal photo chromic glass plate, electrically-controlled liquid crystal photo chromic glass plate is transparent shape when being energized, then in white during power-off, every block 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, described projector is in described view field.
Adopt above structure, the present invention compared with prior art, have the following advantages: adopt the present invention, because background mechanism is close on the writing on the blackboard projection plate be made up of transparent material, background when fixed black background board uses as writing on the blackboard, in the respective regions writing on the blackboard of writing on the blackboard projection plate, its black background can allow the people paid attention to the class see the content of writing on the blackboard clearly, and in white during the power-off of electrically-controlled liquid crystal photo chromic glass, background when using as projection, project on this region, the content of display projection can be known, then to its energising during without the need to projecting, make its transparent shape, now fixed black background board is thereafter just all as the background of writing on the blackboard projection plate.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 seeing projection per capita clearly of different angles.
As preferably, described polylith liquid crystal color-changing glass plate is provided with light activated element, and described projector is provided with the lasing light emitter matched with light activated element, and the feed circuit of described light activated element liquid crystal color-changing glass plate corresponding to it connect.During adjustment projected position, projector slides along rail plate, and lasing light emitter touches the corresponding light photosensitive elements of liquid crystal color-changing glass plate, then the some liquid crystal color-changing glass plates power-off near this liquid crystal color-changing glass plate, forms new view field.
As preferably, the projection lens of projector is provided with lens cap, when suspending projection or terminate projection, block projection lens with lens cap, lasing light emitter touches light activated element, is controlled to be energized to the electrically-controlled liquid crystal photo chromic glass of power-off by light activated element.Doing so avoids the worry of prior art folding and unfolding projection screen, former view field just becomes the region can writing 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, touch light activated element by lasing light emitter, light activated element controls electrically-controlled liquid crystal photo chromic glass homolographic projection region power-off.Be convenient to suspend projection switch with the operating mode continuing to project.
As preferably, described in make writing on the blackboard projection plate transparent material can realize the diffuse reflection of light.So that the spectators of different angles can see the content of writing on the blackboard and projection clearly.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention (the first state);
Fig. 2 is structural representation of the present invention (the second state);
Fig. 3 is the structural representation of projector and rail plate;
As shown in the figure, 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 activated element, 7, lasing light emitter.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but the present invention is not restricted to these embodiments.
The present invention contain any make on marrow of the present invention and scope substitute, amendment, equivalent method and scheme.To have the present invention to make the public and understand thoroughly, in the following preferred embodiment of the present invention, describe concrete details in detail, and do not have the description of these details also can understand the present invention completely for a person skilled in the art.In addition, the needs in order to illustrate in the accompanying drawing of the present invention, completely accurately do not draw according to actual ratio, are explained at this.
As Fig. 1, shown in 2 and 3, a kind of teaching board book optical projection system based on automatically controlled glass of the present invention, comprise 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 mutually with it, described writing on the blackboard projection plate 1 is made up of transparent material, described background mechanism comprises 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, projection screen plate 4 is formed by connecting by polylith electrically-controlled liquid crystal photo chromic glass plate, electrically-controlled liquid crystal photo chromic glass is transparent shape when being energized, then in white during power-off, every block 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.
Based on the above-mentioned teaching board book optical projection system based on automatically controlled glass, can form the control method of the teaching board book optical projection system based on automatically controlled glass, the following structure qualification for the teaching board book optical projection system based on automatically controlled glass and using method all can be used 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 up of transparent material " is nisi transparent, comprise the states such as translucent, with spectators through seeing font clearly for requiring, its transparency is set, such as after frosted, its transparency can reduce, and the diffuse reflection after frosted can make human eye see more clearly.
Electrically-controlled liquid crystal photo chromic glass is also electronic-control dimming glass, by the mode of liquid crystal film by High Temperature High Pressure, the high-tech photoelectric glass product of sandwich package, whether user can control the arrangement of liquid crystal molecule by the energising of electric current, thus reaches 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-crystalline glasses printing opacity and transparent; During off-position, liquid crystal molecule is scattering state and in white, at this time liquid crystal film printing opacity but opaque.
As illustrated in fig. 1 and 2, respectively illustrate the structure under the present invention's two kinds of different conditions, Fig. 1 be projection screen plate in power-off projection state, Fig. 2 is projection screen plate in energising pellucidity.Specific as follows:
Described polylith liquid crystal color-changing glass plate 4.1 is provided with light activated element 6 (can be arranged to one_to_one corresponding, also can arrange selectively), described projector 2 is provided with the lasing light emitter 7 matched with light activated element 6, and the feed circuit of described light activated element 6 liquid crystal color-changing glass plate 4.1 corresponding to it connect.During adjustment projected position, projector slides along rail plate, lasing light emitter touches the corresponding light photosensitive elements of liquid crystal color-changing glass plate, some liquid crystal color-changing glass plates power-off then near this liquid crystal color-changing glass plate (centered by that liquid crystal color-changing glass plate that lasing light emitter is aimed at), forms new view field (these features can as a part for control method).
As shown in Figure 3, the projection lens of projector 2 is provided with lens cap 2.1, when suspending projection or terminate projection, block projection lens with lens cap 2.1, lasing light emitter 7 touches light activated element 6, is controlled to be energized to the electrically-controlled liquid crystal photo chromic glass of power-off by light activated element 6;
When starting projection or continuing projection, open lens cap 2.1, touch light activated element 6 by lasing light emitter 7, light activated element 6 controls 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 reflection of light.
" lens cap blocks projection lens " easy to use just in order in classroom or teaching process, does not close the power supply of projector, also needs to close projector power supply after end.
Color due to 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 all affect drop shadow effect, when namely projecting, do not need the white letter written with chalk wiping view field, after projection disappears, white letter written with chalk can continue to use.
The present invention also has the advantage that prior art does not have: adopt ground glass or frosted organic glass under dampness, do not affect the writing effect of chalk, wet towel therefore can be used to regard blackboard eraser, avoid the infringement of dust to user lung.
Below only just preferred embodiment of the present invention is described, but can not be interpreted as it is limitations on claims.The present invention is not only confined to above embodiment, and its concrete structure allows to change.In a word, all various changes done in the protection domain of independent claims of the present invention are all in protection scope of the present invention.
Claims (5)
1. the teaching board book optical projection system based on automatically controlled glass, it is characterized in that: comprise 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 mutually with it, described writing on the blackboard projection plate (1) is made up of transparent material, described background mechanism comprises 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 being energized, then in white during power-off, electrically-controlled liquid crystal photo chromic glass is transparent shape when being energized, then in white during power-off, every block 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.
2. the teaching board book optical projection system based on automatically controlled glass according to claim 1, it is characterized in that: described polylith liquid crystal color-changing glass plate (4.1) is provided with light activated element (6), described projector (2) is provided with the lasing light emitter (7) matched with light activated element (6), and the feed circuit of described light activated element (6) liquid crystal color-changing glass plate (4.1) corresponding to it connect.
3. the teaching board book optical projection system based on automatically controlled glass according to claim 1 and 2, 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 activated element (6), is controlled to be energized to the electrically-controlled liquid crystal photo chromic glass of power-off by light activated element (6).
4. according to claim 1 or 2 based on automatically controlled glass teaching board book optical projection system, it is characterized in that: when starting projection or continuing projection, open lens cap (2.1), touch light activated element (6) by lasing light emitter (7), light activated element (6) controls electrically-controlled liquid crystal photo chromic glass homolographic projection region power-off.
5. the teaching board book optical projection system based on automatically controlled glass according to claim 1 and 2, is characterized in that: described in make writing on the blackboard projection plate (1) transparent material can realize the diffuse reflection of light.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610068325.2A CN105549316B (en) | 2014-12-03 | 2014-12-03 | Teaching board book projecting method 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 |
| CN201410727112.7A CN104375369B (en) | 2014-12-03 | 2014-12-03 | Teaching board book optical projection system 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 true CN104375369A (en) | 2015-02-25 |
| CN104375369B CN104375369B (en) | 2016-08-24 |
Family
ID=52554382
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410727112.7A Expired - Fee Related CN104375369B (en) | 2014-12-03 | 2014-12-03 | Teaching board book optical projection system based on automatically controlled glass |
| CN201610068325.2A Expired - Fee Related CN105549316B (en) | 2014-12-03 | 2014-12-03 | Teaching board book projecting method based on automatically controlled glass |
Family Applications After (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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN104375369B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114371592A (en) * | 2022-02-14 | 2022-04-19 | 四川众森同越科技有限公司 | Teaching demonstration integrated machine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104375369B (en) * | 2014-12-03 | 2016-08-24 | 中国计量学院 | Teaching board book optical projection system based on automatically controlled glass |
| 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 |
Citations (5)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104375369B (en) * | 2014-12-03 | 2016-08-24 | 中国计量学院 | Teaching board book optical projection system based on automatically controlled glass |
-
2014
- 2014-12-03 CN CN201410727112.7A patent/CN104375369B/en not_active Expired - Fee Related
- 2014-12-03 CN CN201610068325.2A patent/CN105549316B/en not_active Expired - Fee Related
Patent Citations (5)
| 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 |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114371592A (en) * | 2022-02-14 | 2022-04-19 | 四川众森同越科技有限公司 | Teaching demonstration integrated machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105549316A (en) | 2016-05-04 |
| CN104375369B (en) | 2016-08-24 |
| CN105549316B (en) | 2017-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104468882A (en) | Portable electronic device | |
| CN206450918U (en) | Liquid crystal light modulation interactive electric whiteboard | |
| CN204207309U (en) | Multimedia desk | |
| CN203338615U (en) | Projection easel provided with projection screen | |
| CN104375369B (en) | Teaching board book optical projection system based on automatically controlled glass | |
| CN107093348A (en) | Music appreciation board of education | |
| CN204215139U (en) | A kind of teaching board book projector mechanism | |
| CN105785697B (en) | Writing on the blackboard optical projection system based on automatically controlled glass | |
| CN204215137U (en) | A kind of teaching board book optical projection system based on automatically controlled glass | |
| CN104330949B (en) | Teaching board book projector mechanism | |
| CN204215138U (en) | A kind of teaching board book optical projection system | |
| CN104375370B (en) | Teaching board book projection arrangement | |
| CN108784182A (en) | A kind of dynamic and the static Multi-layer painting frame combined | |
| CN201017490Y (en) | Luminous copy practice board | |
| CN104345539A (en) | Control method of teaching blackboard writing projection system | |
| CN105654788B (en) | Classroom corollary apparatus | |
| CN205044364U (en) | Tourism management board of imparting knowledge to students | |
| CN204241824U (en) | A kind of teaching board book projection arrangement | |
| CN104330950A (en) | Blackboard-writing projecting system for teaching | |
| CN107703655B (en) | Projectable liquid crystal blackboard | |
| CN104464392A (en) | Control method of writing blackboard projection device for teaching | |
| CN208072262U (en) | One kind is novel modularized to illuminate signpost | |
| CN207068276U (en) | A kind of projection arrangement and system for Writing-painting | |
| CN104375368B (en) | The control method of teaching board book projector mechanism | |
| CN106945431B (en) | A kind of electronic teaching board system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Mingyan Inventor after: Zhi Hang Inventor before: Zhao Mingyan |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 Termination date: 20171203 |