JPH03241333A - Overhead projector - Google Patents

Abstract

PURPOSE:To obtain this OHP without the need for an indirect medium by using a picture data obtained by fetching a picture written on an original and converting into the picture data, and displaying the picture written on the original on a liquid crystal display device. CONSTITUTION:The OHP is constituted of a picture inputting device 10 fetching the original as the picture and a projector 18 projecting the picture fetched from the image inputting device 10 on a screen. The picture inputting device 10 is provided with a power switch 11, a starting switch 12 starting reading the original, an one-line CCD 13 reading the original by line and a clearing switch 14 erasing the contents of the liquid crystal display device (LCD) 17. Furthermore, the OHP is constituted of a memory 15 storing the picture data read by the one-line CCD 13, etc., and a input/output controller 16 controlling the one-line CCD 13 and the LCD 17, etc. By constituting the OHP so that the picture is thus projected on the screen 19, the need for prepareing an OHP sheet difficult to be reused is eliminated.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an overhead projector that projects originals such as documents and figures onto a screen, etc., and displays an image captured using an image scanner or the like on a liquid crystal display. The present invention relates to an overhead projector that projects an image displayed on a liquid crystal display onto a screen by shining light onto the liquid crystal display.

2. Description of the Related Art In conventional overhead projectors (hereinafter referred to as OHP), an indirect medium is created by writing or copying the original onto an OHP sheet, and this medium is then projected using the OHP. Was.

Problems to be Solved by the Invention In the conventional OHP mentioned above, OHP is used as an indirect medium.
Requires a sheet etc. One sheet of this indirect medium is required for each manuscript, and it takes a lot of time to create it, and it is almost impossible to reuse this indirect medium, making it very uneconomical. Ta.

The present invention solves the problems of the prior art, and aims to provide a new OHP that does not require the above-mentioned indirect media.

Means for Solving the Problems The overhead projector (OHP) of the present invention includes a first means for capturing an image written on a document and converting it into image data, and a first means for capturing the image written on a document and converting it into image data, and converting the image data obtained by the first means. and a third means for projecting an image displayed on the liquid crystal display by irradiating light onto the image displayed on the liquid crystal display. .

Effects According to the present invention, since images displayed on a liquid crystal display can be directly projected onto a screen or the like, it is possible to provide an OHP that does not require an indirect medium such as an OHP sheet.

EXAMPLES The present invention will be explained in more detail with reference to examples shown in the accompanying drawings.

FIG. 1 is a perspective view showing the appearance of an OHP according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of an electric circuit portion of the OHP shown in FIG. 1. As shown in FIG. 1, the OHP of this embodiment is comprised of an image input device 10 that captures a document as an image, and a projector 18 that projects the image captured from the image input device 10 onto a screen 19. . As shown in the figure, the image input device IO includes a power switch 11, a start switch 12 that starts reading the original, and a 1-line C0D that reads the original line by line.
13, a clear switch 14 for erasing the contents of a liquid crystal display (hereinafter referred to as LCD) 17, a memory 15 for storing image data read by the 1-line CCD, 1-line CCD 13, memory 15, LCD 17, etc. In addition, the projector 18 includes a light source (not shown) and a dot (vertical) x horizontal (m) that displays the image captured from the image input device IO.
It is configured with a dot LCD 17. Here, the memory 15, the input/output control device 16, etc. may be provided on the side of the projector 18. Next, the operation of the embodiment shown in FIGS. 1 and 2 will be explained using the flowchart shown in FIG. As shown in FIG. 3, when it is determined in step S1 that the power switch 11 is turned on, the 1-line CCD
13, memory 15, input/output control device 16, and LCD 17
Initial settings such as the following are performed. Next, if it is determined in step S3 that the clear switch 14 has been pressed, the display on the LCD 17 is erased in step S4, and the process then proceeds to step S5. Also, step S
If it is determined in step 3 that the clear switch 14 is not pressed, the process immediately proceeds to step S5 without performing the process of step S4. In step S5, it is determined whether or not the start switch 12 has been pressed, and if it is determined that it has not been pressed, the process returns to step S3;
If it is determined that the button has been pressed, the process advances to step S6.

In step S6, the variable i is set as the count value of the counter, and the value of i is set to 1. Next, in step S7, the one-line CCD 13 reads the i-th divided original among the m divided originals, develops the data as n-dot data, and stores it in the memory 15. Next, in step S8, the data stored in the memory 15 is read out, and a vertical n dot is displayed at the i-th position on the LCD 17. Next, in step S9, 1 is added to the count value i of the counter, and in step S9, 1 is added to the count value i of the counter.
At O, it is determined whether the count value i of the counter is equal to the value m. If it is determined in step SIO that the count value i is not equal to the value m, the process returns to step S7 and the processes from steps S7 to SIO are repeatedly executed. If it is determined that the count value i is equal to the value m, the 1-line CCD 13 is initialized in step Sll, and then the process returns to step S2, where it waits for the start switch 12 to be pressed. . When the start switch 12 is pressed, the above steps 82 to
The process of Sll is executed repeatedly.

In the above embodiment, the image input device 10 and the projector 18 have been described as separate devices, but it goes without saying that they may be configured as one unit. Alternatively, data directly read by the 1-line CCD 13 may be displayed on the LCD 17 without providing the memory 15.

As is clear from the above description, according to this embodiment,
Image read from 1-line CCD 13
17 and projected onto the screen 19, there is no need to create an OHP sheet that is difficult to reuse.

Effects of the Invention As is clear from the above embodiments, the present invention has the following effects.

(1) The original can be directly projected onto a wall or the like.

(2) Indirectly necessary media, such as OHP sheets, become unnecessary.

[Brief explanation of drawings]

FIG. 1 shows an overhead projector (OHP) according to an embodiment of the present invention.
), FIG. 2 is a block diagram showing an example of the configuration of the electric circuit portion of the overhead projector shown in FIG. 1, and FIG. It is a flowchart showing the operation. lO...Image input device, 11...Power switch, 1
2... Start switch, 14... Clear switch, 15... Memory, 16... Input/output control device, 17
...Liquid crystal display (LCD), 1g...projector.

Claims (1)

[Claims] a first means for capturing an image written on a manuscript and converting it into image data; and a second means for displaying the image written on the manuscript on a liquid crystal display using the image data obtained by the first means. and third means for projecting an image displayed on a liquid crystal display by irradiating it with light.