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Title:
A picture projection system, a projection display device, and a program
Document Type and Number:
Japanese Patent JP6136264
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an image projection system which detects a position on a screen indicated by a pointing device with a simple and inexpensive configuration.SOLUTION: An image forming system includes a projector device and a pointing device. The pointing device includes: a luminance detection unit which detects luminance of at least one pixel of a projection image; a determination unit which determines whether an amount of change in luminance detected by the luminance detection unit is larger than a threshold or not; and a transmission unit which transmits a notification signal to the projector device when the determination unit determines that the amount of change is larger than the threshold. The projector device includes: a luminance change unit which changes luminance of each of pixels included in input image data sequentially; a receiving unit which receives the notification signal; and a specification unit which specifies a position of the pixel whose luminance is to be changed, as a position indicated by the pointing device when the receiving unit receives the notification signal.

Inventors:
Yoshiaki Nishikawa
Application Number:
JP2012289061A
Publication Date:
May 31, 2017
Filing Date:
December 28, 2012
Export Citation:
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Assignee:
株式会社リコー
International Classes:
G06F3/0346; G03B21/00; G03B21/14; G06F3/041; G06F3/042; G09G5/00; G09G5/36; G09G5/377; G09G5/38; G09G5/39; H04N5/74
Domestic Patent References:
JP9034642A
JP2011014168A
JP6250618A
Attorney, Agent or Firm:
Hiroaki Sakai