In a display device provided with a frame memory developing an auxiliary line image as a display image and a means of reading out and displaying the image data developed in the aforementioned frame memory, the aforementioned auxiliary line image is constituted by background pixels and dashed auxiliary lines constituted by pixels which have luminance or color that is different from that of the background color and pixels with have nearly identical luminance or color to that of the background color; and by carrying out the display of the dashes so as to move, at fixed time intervals or arbitrary time intervals, the dash display areas of the aforementioned auxiliary lines on the trajectory of the figure described by the aforementioned auxiliary lines, the system is devised to display the auxiliary lines while controlling that an identical pixel of the display device is not displayed continually.
1. A projection type image display device for projecting and displaying an image on a recording surface of a recording facility, the projection type image display device comprising:
a frame memory storing a prescribed auxiliary line image as a display image to be projected; and
a means of reading out the image data from the frame memory and displaying the image data read out from the frame memory, wherein:
the auxiliary line image, which is a guiding indication for recording on the recording surface of the recording facility, is constituted by background color and dashed auxiliary lines extending along a first direction, the dashed auxiliary lines being constituted by (i) dashes, which are pixels which have luminance or color that is different from that of the background color and (ii) pixels which have nearly identical luminance or color to that of the background color, a space between adjacent auxiliary lines is greater than a line width of the dashed auxiliary lines and the space is constituted by the background color; and
the dashed auxiliary lines are written to the frame memory and are displayed so as to move dash display areas, at fixed time intervals or arbitrary time intervals, on a trajectory of a figure represented by the dashed auxiliary lines, the trajectory of the figure is displayed with other portions, which do not constitute a trajectory of a figure in the display image, in order to make the auxiliary line image be the guiding indication, the dashed auxiliary lines are displayed so as not to move the dash display areas on any position other than the trajectory of the figure, and the auxiliary line image as a whole is projected and displayed on an identical position with respect to a second direction perpendicular to the first direction on the recording surface of the recording facility.
2. The projection type image display device according to claim 1 , wherein the dashed auxiliary lines is displayed such that, at the fixed time intervals or the arbitrary time intervals, for the dash display areas of the dashed auxiliary lines, pixel areas whose luminance or color differs from that of the background color are changed into a luminance or color that is nearly identical to that of the background color and pixel areas whose luminance or color is nearly identical to that of the background color are changed into a luminance or color that differs from that of the background color.
3. The projection type image display device according to claim 1 , further comprising:
an operation means for operating the projection type image display device;
a frame memory read means for detecting input information from the operation means, for changing the display color of the auxiliary line image in accordance with the input information, and for storing the auxiliary line image with the changed display color in the frame memory; and
a storage means for storing settings data about auxiliary line image display colors, wherein:
with respect to the input information from the operation means, the background color or luminance level of the auxiliary line image as well as the display color or luminance level of the dashed auxiliary lines are taken to be adjustable, and
present setting data are stored in the storage means to hold a setting state thereof.
4. The projection type image display device according to claim 1 , further comprising:
an operation means for operating a display device;
a frame memory read means for detecting input information from the operation means, for modifying a display interval between the adjacent dashed auxiliary lines of the auxiliary line image in accordance with the input information, and storing the auxiliary line image with modified intervals of the dashed auxiliary lines in the frame memory; and
a storage means for storing settings data of the display intervals of the auxiliary line image, wherein:
the display interval between the dashed auxiliary lines of the auxiliary line image is taken to be adjustable with respect to the input information from the operation means, and
present setting data are stored in the storage means to hold a setting state thereof.
5. The projection type image display device according to claim 1 , further comprising:
an auxiliary line image storage means for pre-storing a plurality of auxiliary line images with a plurality of shapes;
an operation means for operating the projection type image display device;
a frame memory read means for detecting input information from the operation means, for reading out one of the auxiliary line images selected from the auxiliary line image storage means in accordance with the input information, and for storing the one of the auxiliary line images in the frame memory; and
a storage means for storing selected information about the one of auxiliary line images that has been selected from the auxiliary line image storage means, wherein:
with respect to the input information from the operation means, the plurality of auxiliary line images are selectively displayed, and
present selected information is stored in the storage means to hold a setting state thereof.
6. The projection type image display device according to claim 5 , further comprising:
an image transformation means for carrying out auxiliary line image size enlargement or reduction; and
a frame memory read control means for controlling display positions of the auxiliary line image by controlling writing positions in the frame memory, wherein:
with respect to the input information from the operation means, an auxiliary line size and a display position are modifiable, and
present selected information is stored in the storage means to hold a setting state thereof.
7. The projection type image display device according to claim 1 further comprising:
a light source provided with a light adjusting means for adjusting a quantity of light provided by the light source;
a fan for cooling a heat generation block in accordance with changes in the quantity of light; and
a fan drive circuit for driving the fan,
wherein the quantity of light and a rotation rate of the fan are controlled in accordance with displaying the auxiliary line image.
8. The projection type image display device according to claim 1 , wherein:
the projection type image display device is configured to implement distortion correction by means of transforming an image displayed on the recording surface of the recording facility, and
spaces between the dashes constituting the dashed auxiliary lines are set so that the dashes do not join to become a solid line, even in a case where distortion correction has been carried out.
9. The projection type image display device according to claim 1 , wherein:
the projection type image display device is configured to implement distortion correction by means of transforming an image displayed on the recording surface of the recording facility, and
in conjunction with an amount of distortion correction, spaces between the dashes are adjusted so that the dashes do not joint to form a solid line, in the image displayed on the recording surface of the recording facility.
10. A projection type image display device for projecting and displaying an image on a recording surface of a recording facility, the projection type image display device comprising:
an auxiliary line image storage means for pre-storing auxiliary line image data about an auxiliary line image, which is a guiding indication for recording on the recording surface of the recording facility, with a plurality of shapes;
an OSD (On Screen Display) circuit for displaying the auxiliary line image;
an image synthesis circuit for weighting auxiliary line image data that are output from the OSD (On Screen Display) circuit and for superimposing the weighted auxiliary line image with image data to be displayed;
an auxiliary line image display control part for reading out auxiliary line image data from the auxiliary line image storage means, and for setting the auxiliary line image data in the OSD circuit part; and
a means for displaying a superimposed image of the weighted auxiliary line image and image data, wherein:
the auxiliary lines are constituted by dashes and extend along a first direction,
a space between adjacent auxiliary lines is greater than a line width of the auxiliary lines, and
the display of the dashes is carried out so as to move dash display areas displaying the dashes at fixed time intervals or arbitrary time intervals, on a trajectory of a figure represented by an entirety of the dashes, by changing the auxiliary line image data from the auxiliary line image storage means, the trajectory of the figure is displayed with other portions, which do not constitute a trajectory of a figure in the display image, in order to make the auxiliary line image be the guiding indication, the display of the dashes is carried out so as not to move the dash display areas on any position other than the trajectory of the figure, and the auxiliary line image is projected on an identical position with respect to a second direction perpendicular to the first direction on the recording surface of the recording facility.