Control method of blackboard-writing projector mechanism for teaching

A control method and projection technology, which can be used in educational appliances, optical, and electrically operated teaching aids, etc., can solve the problems of reducing the effective writing area of ​​blackboards and projection screens, and achieve the effect of increasing the effective writing area.
CN104375368AInactive Publication Date: 2015-02-25CHINA JILIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA JILIANG UNIV
Publication Date
2015-02-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a control method of a blackboard-writing projector mechanism for teaching. The blackboard-writing projector mechanism for teaching comprises a blackboard-writing projection board (1), a background mechanism and a projector (2). The background mechanism is positioned in rear 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 of transparent materials. The background mechanism comprises a black movable background board (3), a white movable background board (4) and a black fixed background board (5) which are sequentially arranged in rear of the blackboard-writing projection board. The area of the white movable background board (4) is equal to that of the black movable background board (3). The white movable background board (4) and the black movable background board (3) can move leftwards and rightwards under the drive of a power mechanism. By the control method, effective writing area can be increased, the position of the white movable background board can be changed to enable people at different angles to see projected content clearly, and switching of projection and projection states can be realized.
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Description

technical field

[0001] The invention relates to the field of teaching appliance control, in particular to a control method of a blackboard writing projection mechanism for teaching. Background technique

[0002] The blackboard used for teaching blackboard writing is indispensable in the classroom. For modern teaching, multimedia projection is naturally indispensable. Many classrooms use teaching equipment combining blackboards and projection screens, which not only meet the needs of teachers for blackboard writing, but also use projection equipment for projection teaching. In the prior art, the projection equipment includes a projector and a projection screen. The projection screen and the blackboard are generally installed on the wall in front of the classroom. However, due to the limited area of ​​the wall, the projection screen and the blackboard often overlap. Therefore, there are following technical problems in the blackboard projection equipment of the prior art: [...

Claims

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