Image projecting device and image projecting method
The present invention provides an image projecting device for projecting projecting light corresponding to image information by projecting means. The image projecting device includes at least scanning monitoring means for monitoring entrance of an entering object into a projecting area on which the projecting light is projected. The scanning monitoring means monitors at least a part of outer edges of the projecting area on which the projecting light from the projecting means is projected.
1. An image projecting device, comprising:
a projecting light source for projecting projected light corresponding to image information by projecting means on a projecting area for receiving said projected light, said projecting area defining outer edges;
scanning monitoring means emitting a monitoring wave for monitoring entrance of an entering object into said projecting area on which said projecting light is projected;
said scanning monitoring means performing monitoring along at least a part of said outer edges of the projecting area on which said projecting light from said projecting means is projected,
wherein at least a part of a monitoring wave emitted from said scanning monitoring means is reflected for monitoring by reflecting means, wherein said reflecting means comprises first reflecting means and second reflecting means; and said first reflecting means and said second reflecting means each comprise a first mirror and a second mirror.
2. The image projecting device as claimed in claim 1 , wherein said scanning monitoring wave scans a lower edge of the outer edges of the projecting area in a horizontal direction to detect an entering object.
3. The image projecting device as claimed in claim 2 , wherein said scanning monitoring wave scans vertical edges of the outer edges of the projecting area in a vertical direction to detect an entering object.
4. The image projecting device as claimed in claim 2 , wherein scanning monitoring save scans vertical edges of the outer edges of the projecting area in a vertical direction to detect an entering object.
5. The image projecting device as set forth in claim 1 , wherein said projecting area is defined at least by points A, B, C, D, E and F defining a rectangular area wherein scanning is performed between point A and point B in a substantially horizontal direction along the lower side of the outer edges of the projecting area, and along an extension of said horizontal direction between points A and C and between points B and D, wherein the first reflecting means reflects the scanning monitoring wave between points A and C to thereby scan the monitoring wave from point B to point F along a vertical edge of said projecting area, and wherein the second reflecting means reflects the scanning monitoring wave between points A and E on another vertical edge of said projecting area.
6. the image projecting device as set forth in claim 5 , wherein said first and said second reflecting means are arranged relative to said scanning monitoring means and said projecting area to achieve the stated scanning functions.
7. The image projecting device as set forth in claim 1 , wherein said projecting area is on a screen.
8. The image projecting device as set forth in claim 1 , wherein said projecting area is defined at least by points A, B, C, D, E and F defining a rectangular area wherein scanning is performed between point A and point B in a substantially horizontal direction along line S 1 which is the lower side of the outer edges of the projecting area, and between point and along an extension of said horizontal direction between points A and C and between points B and D therealong, wherein the first reflecting means reflects the scanning monitoring wave between points A and C to thereby scan the monitoring wave from point B to point F along a vertical edge of said projecting area along line S 2 , and wherein the second reflecting means reflects the scanning monitoring wave between points A and E on another vertical edge of said projecting area along line S 3 .
9. the image projecting device as set forth in claim 8 , wherein said first and said second reflecting means are arranged relative to said scanning monitoring means and said projecting area to achieve the stated scanning functions.
10. An image projecting device, comprising:
a source of projected light;
a projecting area for receiving projected light, said projecting area defined by a substantially horizontal line S 1 , and a pair of spaced substantially vertical lines S 2 and S 3 respectively;
scanning monitoring means emitting a monitoring wave for monitoring entrance of an entering object into said projecting area on which said projected light is projected, said scanning monitoring means performing monitoring along at least a part of said outer edges of the projecting area;
reflecting means for reflecting at least a part of said monitoring wave emitted from said scanning monitoring means, said reflecting means having a first reflecting means and a second reflecting means, each comprising a first mirror and a second mirror, wherein
said scanning monitoring means and said reflecting means cooperate to scan at least a portion of said edges of said projecting area.
11. The image projecting device as claimed in claim 10 , wherein said scanning monitoring wave scans a lower edge of the outer edges of the projecting area in a horizontal direction along the line S 1 to detect an entering object.
12. The image projecting device as set forth in claim 10 , wherein said projecting area is on a screen.