CN102736818A - Electromagnetic multi-pen electronic whiteboard - Google Patents

Abstract

The invention is applicable to an electronic whiteboard of an electronic induction technology. Technically, a mode that a pen is provided with an operation frequency is abandoned; multi-pen same-frequency time-sharing operation is adopted; specific working time is distributed to each pen; electronic pens are only allowed to work in the own specific time; and a system can determine a certain working pen according to data obtained at different time, so that multi-pen multi-color operation is implemented.

Description

Many electronic whiteboards of a kind of electromagnetism

Affiliated technical field

The present invention relates to a kind of electronic whiteboard of can multiple color pencil writing simultaneously.

Technical background

At present, many electronic whiteboards are divided into two types, and the first kind is an infrared blank and based on the electronic whiteboard of camera.Though these two kinds of blanks can support the pen more than two to write simultaneously, shortcoming is that the color attribute of all is identical at one time, can not realize that the different colours of different pens is write.Second type is the electromagnetism blank, but can realize that at present two are write simultaneously, and in order to realize double-pen writing, two pens use different frequencies to operate, and can well solve and support two colors of two pens to write simultaneously.But technology all is that two pens use simultaneously at present, continue to increase the quantity of pen, with regard to difficulty very.

Summary of the invention

In order to satisfy the demand that the user supports that simultaneously the pen more than 2 is write with various colors, we have designed this cover solution, can let the user just as using the convenient use electronic whiteboard freely of conventional white board.

The present invention is applicable to the electronic whiteboard of electromagnetic induction technology.The technical mode of abandoning an operating frequency of one-pen; Adopt many same frequency time-sharing operations; Distribute to every working time that pen is specific, electronic pen is not allow work in non-own special time; It is that which pen is being worked that the data that system obtains according to different time are judged, thereby realizes color operations more than many.

The invention has the beneficial effects as follows; The governor circuit of electronic whiteboard does not only have to become complicated because increasing the quantity of supporting pen; Because the same frequency time-sharing operation makes many circuit the same with the single circuit on the contrary simple, reduced the degree of difficulty that realizes greatly on the contrary.Though the electronic pen part has increased the single-chip microcomputer of a cheapness; But the problem of frequency modulation difficulty has but obtained basic solution when producing, because the transmission frequency of pen can be produced by single-chip microcomputer, the precision consistance is very high; And, improved production efficiency greatly without workman's adjustment.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

Figure of description is a realization theory diagram of the present invention.

It among the figure realization block diagram of four pens and a blackboard eraser.1. 6. No. four working time T4 of 5. No. three working time T3 of 4. No. two working time T2 of No. 3. working time T1 of synchronic command M, 7. blackboard eraser working time T5 that complete sense cycle T 2. is sent by the blank control card

Embodiment

Among the figure, when a new sense cycle T begins, at first send a synchronous commencing signal M,, then send electromagnetic wave after then receiving synchronizing signal on blank in the T1 time if a pen is just operated by the blank governor circuit; If No. two pen is just operated, then send electromagnetic wave after then receiving synchronizing signal in the T2 time on blank; If No. three pen is just operated, then send electromagnetic wave after then receiving synchronizing signal in the T3 time on blank; If No. four pen is just operated, then send electromagnetic wave after then receiving synchronizing signal in the T4 time on blank; If blackboard eraser is just operated, then send electromagnetic wave after then receiving synchronizing signal in the T5 time on blank.Because it is that governor circuit can be judged through sequential for which electromagnetic wave that pen sends, thereby distribute the different color attributes of writing for easily different pens.This instance just with blackboard eraser of four pens as explanation, be not limited in four pens when in fact really implementing.

Claims (6)

1. the blank main control card is that numbering through every pen oneself realizes to the identification of electronic pen.

2. because every pen has own intrinsic numbering, so need be when using through selecting confirm its color.

3. time-sharing operation, every pen is only worked in the time of oneself, other the time do not transmit.

4. the transmission frequency of electronic pen is produced by single-chip microcomputer in the pen.

5. all electronic pens comprise that the transmission frequency of electronics blackboard eraser is the same.

6. the synchronizing signal sent by electronic whiteboard of the work of all electronic pens is a benchmark.

Images