CN105785697B - Writing on the blackboard optical projection system based on automatically controlled glass - Google Patents
Writing on the blackboard optical projection system based on automatically controlled glass Download PDFInfo
- Publication number
- CN105785697B CN105785697B CN201610068324.8A CN201610068324A CN105785697B CN 105785697 B CN105785697 B CN 105785697B CN 201610068324 A CN201610068324 A CN 201610068324A CN 105785697 B CN105785697 B CN 105785697B
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- China
- Prior art keywords
- projection
- blackboard
- plate
- writing
- liquid crystal
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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
- G03B21/132—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
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- 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 writing on the blackboard optical projection system based on automatically controlled glass, including writing on the blackboard projection plate (1), background mechanism and projecting apparatus (2), described background mechanism is located at the rear side of writing on the blackboard projection plate (1) and mutually pressed close to it, the 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 located 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 transparent shape when being powered, it is then white during power-off, the projecting apparatus (2) is projected on the electrically-controlled liquid crystal photo chromic glass of power-off in projection.The present invention can increase effective write area, and the position or outage area that can change electrically-controlled liquid crystal photo chromic glass change projected position, and make different angles can see the content of projection clearly per capita.
Description
The application is application number 201410727112.7,03 day December 2014 applying date, denomination of invention " based on automatically controlled glass
The divisional application of the teaching board book optical projection system of glass ".
Technical field
The present invention relates to teaching aid field, specifically a kind of writing on the blackboard optical projection system based on automatically controlled glass.
Background technology
Blackboard for instructor's writing on the blackboard is that classroom is essential, for the teaching of modernization, and multimedia is thrown
Shadow naturally also seems indispensable.The teaching equipment that blackboard is combined with projection screen is all employed in many classrooms, should meet old
The demand of teacher's writing on the blackboard, and projection teaching can be carried out using projector equipment.In the prior art, projector equipment includes projecting apparatus and projection
On curtain, projection screen and the blackboard typically same wall located at before classroom, but because wall area is limited, projection screen and blackboard are often
There is overlapping part.Therefore there is following technical problem in the writing on the blackboard projector equipment of prior art:
1st, projection screen and blackboard lap meeting shield portions blackboard, some projection screens have even covered the black of almost half
Plate, greatly reduces effective write area of blackboard;
2nd, 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, similarly, if projection screen is arranged on the right side in classroom, the classmate's association in left side is influenceed by certain.If
Projection screen is arranged in the middle of classroom, can not only influence the viewing of both sides classmate, can also influence teacher's writing on the blackboard;
3rd, in order to increase effective write area of blackboard, it is necessary to turn off projecting apparatus in the middle of at school, projection screen is risen,
Need projection to fall once more, not only bother, and waste time in classroom;
4th, after being write on whole blackboard, if desired multimedia projector is aided in, and now projection screen can block blackboard part
Chalk writing, causes certain inconvenience, to use these chalk writings again, needs to turn off projecting apparatus again, by projection screen
Rise.
The content of the invention
In view of this, the blackboard effective write area of reduction overlapping with projection screen that the present invention exists for above-mentioned prior art
The problems such as project system there is provided a kind of effective write area is big, projected position is adjustable based on automatically controlled glass teaching board book
System.
The technical solution of the present invention is to provide a kind of projection of the teaching board book based on automatically controlled glass of following structure
System, including writing on the blackboard projection plate, background mechanism and projecting apparatus, described background mechanism be located at the rear side of writing on the blackboard projection plate and and its
Mutually press close to, the writing on the blackboard projection plate is made of clear material, described background mechanism includes fixed black background board and projection screen
Plate, described projection screen plate is located between black background plate and writing on the blackboard projection plate, and projection screen plate is by polylith electrically-controlled liquid crystal discoloration glass
Glass plate is formed by connecting, electrically-controlled liquid crystal photo chromic glass plate transparent shape, then white during power-off, every piece of liquid crystal color-changing glass when being powered
Glass plate is powered by corresponding circuit, and the corresponding liquid crystal color-changing glass plate of projected position is powered off to form view field, described
Projector in described view field.
Using above structure, the present invention compared with prior art, with advantages below:Using the present invention, due to background machine
Structure is close on the writing on the blackboard projection plate being made of clear material, background when fixed black background board is used as writing on the blackboard, in plate
The respective regions writing on the blackboard of book projection plate, its black background can allow the people paid attention to the class to see the content of writing on the blackboard clearly, and electrically-controlled liquid crystal discoloration glass
Glass is white when powering off, background when being used as projection, projects on the region, can clearly show that the content of projection, nothing
Then it is powered when need to project, makes its transparent shape, now fixed black background board thereafter is just all as writing on the blackboard projection plate
Background.The present invention can increase effective write area, and the position or outage area that can change electrically-controlled liquid crystal photo chromic glass change
Become projected position, make different angles can see the content of projection clearly per capita.
Preferably, described polylith liquid crystal color-changing glass plate is provided with light-sensitive element, described projecting apparatus be provided with
The lasing light emitter that light-sensitive element is engaged, the power supply circuit connection of the corresponding liquid crystal color-changing glass plate of described light-sensitive element.Adjust
During whole projected position, projecting apparatus is slided along rail plate, and lasing light emitter touches the corresponding light-sensitive element of liquid crystal color-changing glass plate, then
Some liquid crystal color-changing glass plates power-off near the liquid crystal color-changing glass plate, forms new view field.
Preferably, being provided with lens cap on the projection lens of projecting apparatus, when pause projection or end projection, lens cap is used
Projection lens is blocked, lasing light emitter touches light-sensitive element, controlled to be powered to the electrically-controlled liquid crystal photo chromic glass of power-off by light-sensitive element.This
Sample avoids the worry of prior art folding and unfolding projection screen, and former view field, which just turns into, can write the region of writing on the blackboard, effectively utilizes
The write area of writing on the blackboard projection plate.
Preferably, when starting to project or continuing projection, open lens cap, light-sensitive element is touched by lasing light emitter, it is photosensitive
Element control electrically-controlled liquid crystal photo chromic glass homolographic projection region power-off.It is easy to operating mode of the pause projection with continuing to project to switch.
Preferably, the transparent material that writing on the blackboard projection plate is made can realize the diffusing reflection of light.In order to different angles
The spectators of degree can see the content of writing on the blackboard and projection clearly.
Brief description of the drawings
Fig. 1 is structural representation (first state) of the invention;
Fig. 2 is structural representation (the second state) of the invention;
Fig. 3 is the structural representation of projecting apparatus and rail plate;
As illustrated, 1, writing on the blackboard projection plate, 2, projecting apparatus, 2.1, projection lens, 2.2, lens cap, 3, fixed black background
Plate, 4, projection screen plate, 4.2, liquid crystal color-changing glass plate, 5, rail plate, 6, light-sensitive element, 7, lasing light emitter.
Embodiment
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
Embodiment.
The present invention covers any replacement, modification, equivalent method and scheme made in the spirit and scope of the present invention.For
Make the public have the present invention thoroughly to understand, concrete details is described in detail in present invention below preferred embodiment, and
Description without these details can also understand the present invention completely for a person skilled in the art.In addition, the accompanying drawing of the present invention
In in order to illustrate the need for, be not drawn to scale accurately completely, be explained herein.
As shown in Figure 1,2 and 3, a kind of writing on the blackboard optical projection system based on automatically controlled glass of the invention, including writing on the blackboard projection plate
1st, background mechanism and projecting apparatus 2, described background mechanism are located at the rear side of writing on the blackboard projection plate 1 and mutually pressed close to it, the 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
Curtain plate 4 is located between fixed black background board 3 and writing on the blackboard projection plate 1, and projection screen plate 4 is connected by polylith electrically-controlled liquid crystal photo chromic glass plate
Connect and form, electrically-controlled liquid crystal photo chromic glass transparent shape, then white during power-off, every piece of liquid crystal color-changing glass plate 4.2 when being powered
Powered by corresponding circuit, the corresponding liquid crystal color-changing glass plate 4.2 of projected position is powered off to form view field, it is described
Projecting apparatus 2 is projected on described view field.
It should be noted that:" transparent " of " the writing on the blackboard projection plate 1 is made of clear material " is nisi transparent, including
The state such as translucent, can see font clearly to require using spectators' transmission, set its transparency, such as after frosted, its transparency
It can reduce, the diffusing reflection after frosted can make one eye and see more clearly.
Electrically-controlled liquid crystal photo chromic glass is also electronic-control dimming glass, by liquid crystal film by way of HTHP, sandwich package
High-tech photoelectric glass product, user can control the arrangement of liquid crystal molecule by whether being powered for electric current, from
And reach the final purpose of control 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 in scattering state and white, at this time liquid crystal film printing opacity but not
It is transparent.
As illustrated in fig. 1 and 2, the structure under two kinds of different conditions of the invention is respectively illustrated, Fig. 1 is projection screen plate in power-off
Projection state, Fig. 2 is projection screen plate in energization pellucidity.It is specific as follows:
Described polylith liquid crystal color-changing glass plate 4.2 (can be arranged to correspond, can also have provided with light-sensitive element 6
Selectively set), described projecting apparatus 2 is provided with the lasing light emitter 7 being engaged with light-sensitive element 6, described light-sensitive element 6 and its
The power supply circuit connection of correspondence liquid crystal color-changing glass plate 4.2.When adjusting projected position, projecting apparatus is slided along rail plate, is swashed
Light source touches the corresponding light-sensitive element of liquid crystal color-changing glass plate, then some liquid crystal color-changing glass near the liquid crystal color-changing glass plate
Plate is powered off (centered on that liquid crystal color-changing glass plate that lasing light emitter is aligned), forms new view field.
As shown in figure 3, being provided with lens cap 2.2 on the projection lens of projecting apparatus 2, when pause projection or end projection, use
Lens cap 2.2 blocks projection lens, and lasing light emitter 7 touches light-sensitive element 6, and the electrically-controlled liquid crystal change to power-off is controlled by light-sensitive element 6
Color glass is powered;
When starting to project or continuing projection, lens cap 2.2 is opened, light-sensitive element 6, light-sensitive element 6 are touched by lasing light emitter 7
Control the power-off of electrically-controlled liquid crystal photo chromic glass homolographic projection region.
The transparent material that writing on the blackboard projection plate 1 is made can realize the diffusing reflection of light.
" lens cap blocks projection lens " is intended merely to easy to use in classroom or teaching process, is not off projection
The power supply of instrument, also needs to close projecting apparatus power supply after end.
It is consistent with white background because the color of the white letter written with chalk on writing on the blackboard projection plate is white, therefore writing on the blackboard projection
The white chalk of optional position does not influence drop shadow effect on plate, that is, when projecting, and is not required to wipe the white letter written with chalk of view field,
After projection disappears, white letter written with chalk can be continuing with.
The present invention also has the advantages that prior art is not had:Using ground glass or frosted lucite in humidity
Do not influence the writing effect of chalk under state, therefore wet towel can be used to regard blackboard eraser, it is to avoid dust is to user's lung
The infringement in portion.
Only preferred embodiments of the present invention are described above, but are not to be construed as limiting the scope of the invention.This
Invention is not only limited to above example, and its concrete structure allows to change.In a word, all guarantors in independent claims of the present invention
The various change made in the range of shield is within the scope of the present invention.
Claims (1)
1. a kind of writing on the blackboard optical projection system based on automatically controlled glass, it is characterised in that:Including writing on the blackboard projection plate (1), background mechanism and
Projecting apparatus (2), described background mechanism is located at the rear side of writing on the blackboard projection plate (1) and mutually pressed close to it, the writing on the blackboard projection plate (1)
It 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 located between fixed black background board (3) and writing on the blackboard projection plate (1), and projection screen plate (4) is by polylith electrically-controlled liquid crystal discoloration glass
Glass plate (4.2) is formed by connecting, electrically-controlled liquid crystal photo chromic glass transparent shape, then white during power-off, every block of automatically controlled liquid when being powered
Brilliant photo chromic glass plate (4.2) is powered by corresponding circuit, and the corresponding electrically-controlled liquid crystal photo chromic glass plate (4.2) of projected position is broken
Electricity is to form view field, and described projecting apparatus (2) is projected on described view field;
Electrically-controlled liquid crystal photo chromic glass plate (4.2) described in polylith is provided with light-sensitive element (6), and described projecting apparatus (2) is provided with
The lasing light emitter (7) being engaged with light-sensitive element (6), the described corresponding electrically-controlled liquid crystal photo chromic glass plate of light-sensitive element (6)
(4.2) power supply circuit connection;
When lens cap (2.2), pause projection or end projection are provided with the projection lens of projecting apparatus (2), with lens cap (2.2)
Projection lens is blocked, lasing light emitter (7) touches light-sensitive element (6), the glass that changes colour to the electrically-controlled liquid crystal of power-off is controlled by light-sensitive element (6)
Glass is powered;
When starting to project or continuing projection, lens cap (2.2) is opened, light-sensitive element (6), photosensitive member are touched by lasing light emitter (7)
Part (6) control electrically-controlled liquid crystal photo chromic glass homolographic projection region power-off;
The transparent material of the writing on the blackboard projection plate (1), which is made, can realize the diffusing reflection of light.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610068324.8A CN105785697B (en) | 2014-12-03 | 2014-12-03 | Writing on the blackboard optical projection system based on automatically controlled glass |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201410727112.7A Division CN104375369B (en) | 2014-12-03 | 2014-12-03 | Teaching board book optical projection system based on automatically controlled glass |
Publications (2)
Publication Number | Publication Date |
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CN105785697A CN105785697A (en) | 2016-07-20 |
CN105785697B true CN105785697B (en) | 2017-08-25 |
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CN201610068324.8A Expired - Fee Related CN105785697B (en) | 2014-12-03 | 2014-12-03 | Writing on the blackboard optical projection system based on automatically controlled glass |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111487831A (en) * | 2020-06-11 | 2020-08-04 | 江西沃格光电股份有限公司 | Electrochromic projection screen, projection curtain wall and projection equipment |
CN111766976B (en) | 2020-06-12 | 2022-02-22 | 惠州市华星光电技术有限公司 | Photosensitive color-changing touch display device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001277785A (en) * | 2000-04-03 | 2001-10-10 | Minolta Co Ltd | Electronic blackboard |
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 |
CN202523264U (en) * | 2012-04-23 | 2012-11-07 | 王全花 | Luminous pattern mathematic teaching board |
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 |
-
2014
- 2014-12-03 CN CN201610068324.8A patent/CN105785697B/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001277785A (en) * | 2000-04-03 | 2001-10-10 | Minolta Co Ltd | Electronic blackboard |
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 |
CN202523264U (en) * | 2012-04-23 | 2012-11-07 | 王全花 | Luminous pattern mathematic teaching board |
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 |
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CN105785697A (en) | 2016-07-20 |
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Address after: Yuyao City Simen Town Guangming Road 315470 Zhejiang city of Ningbo province No. 126 Applicant after: China Jiliang University Address before: Hangzhou City, Zhejiang province 310018 Jianggan District Xiasha Higher Education Park source Street No. 258 Applicant before: China Jiliang University |
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CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20170825 Termination date: 20181203 |