JPS5915964A - Image display device - Google Patents

Abstract

PURPOSE:To set a belt part used as an image area to a fixed position in a constant area at all times, by constituting so that a prescribed relation is provided between the overall length of a belt being a photoreceptor, and moving length of the belt for forming and displaying one picture. CONSTITUTION:The sum l of an advancing distance l to an exposure position A after an endless belt-like photoreceptor 8 which is driven intermittently starts its turning, and an advancing distance lb moving to a distant end 3a of a window hole 3 from the exposure position A is a distance by which the photoreceptor 8 advances by a cycle for forming and displaying one picture. Against this distance l, the overall length L of the belt-like photoreceptor 8 is set so that l/L becomes 1/integer, and according to such a constitution, a part used as a picture area is set to a fixed position in a constant area at all times, by which a log of the photoreceptor in the picture area part is equalized, and it is possible to prevent generation of partial variable density of an image, etc. due to a difference of the log in one image.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is ll! For more information on the history of the iIzuka display device, please see
Is the image on an endless belt-like image carrier that can be used repeatedly by rotating it? It relates to a forming and displaying device.

In general, CRT (cathode-attached) type image display devices are widely used, but Kanto Motoyama developed an endless belt-shaped urine carrier as a substitute for this type of image display device. We have developed and proposed an image display device for use in conferences.

In short, it consists of the following constituent sounds. That is, in the figure, a guide roll 9.
10, 11, and 12, and is intermittently driven by a driving means (not shown) - Endless belt-shaped photoreceptor 8 (hereinafter referred to as belt-shaped photoreceptor) as a removable image carrier
The output light of a semiconductor laser (not shown) modulated by an image electric signal is moved in one direction by a scanner 5, and an f/θ lens 6 and a mirror ~7? The photoreceptor 8 is provided so that the entire back surface of the belt-shaped photoreceptor 8 is exposed through the photoreceptor 8. This photoreceptor 8f-1: For example, a photoconductive layer is provided on a transparent conductive substrate.

A developing unit 15 having 17 sleeves each having a magnet 16 rotating in the direction of the arrow in the figure is provided opposite the surface of the belt-shaped photoreceptor 8 at the exposure position A (7). Supplied conductive and magnetic? The developer 18 is uniformly regulated by a blade 19 and comes into contact with the surface of the photoreceptor. A DC voltage is applied between the sleeve of the developer and the base of the photoreceptor by a DC voltage source (not shown), and rollers 13 and 14 are located near the exposure and development positions.
The belt-shaped photoreceptor 8 is kept flat and the distance between the photoreceptor surface and the sleeve of the developing device is kept constant with high accuracy. One toner image is formed on the surface of the belt-shaped photoreceptor by beam light irradiation at a position A facing the current household appliance 15 and sent to the display section 2.

The display section 2 is configured such that a rectangular window hole 3 is provided on the front surface of a housing 1, and the toner image on the photoreceptor can be viewed directly from the outside through a transparent member 4 that covers the window hole 3.

The photoreceptor 8 can be stopped for an arbitrary period of time automatically or by operating a switch when a predetermined visible image area coincides with the position of the window hole 3. The toner image on the surface of the photoreceptor can be visually observed through the transparent member 4 through the three window holes. It lights up only while you are moving and goes off when you stop.

When storing the display contents, the photoconductor 8 is moved again and the photoconductor sound having the toner image on its surface can be used again as it is, so there is no particular need for a cleaner to erase the toner image.

Note that while the endless belt-shaped image carrier is intermittently rotated,
Other methods for displaying predetermined formed images include A.
Examples include a heat-sensitive recording system in which a reversible heat-sensitive recording material such as g2HgI4 is formed as the belt, and a heat-sensitive recording head is used as an image forming means.

Now, in the above-described image display device, the image bearing member such as a belt-shaped photoreceptor on which an image is formed is repeatedly used to form approximately the same 7 images by rotation of the belt. - The redundant part of the belt that moves during the image forming/display cycle includes an image area and a non-image area, and this image area is the part A where the image "lt" is displayed.
Due to this, the toner image is injected, and the display section 2 is affected by the fact that all of the outside light is allowed to pass through the window hole 3, and the characteristic stop of the photoreceptor 8 is different from that in the opening area. mk will be generated.

Looking at this problem over time, we can see that there are parts that frequently become the apex region of image 1, and parts that are not, and if these parts are included in the - formed image in p, the history of both will be Differences between the images may appear, resulting in an undesirable effect on the displayed image.

Therefore, in the present invention, the portion used as the image area is always fixed in a fixed area, thereby making the history of the photoreceptor in the image area uniform, and eliminating the difference in history within the image. This is to prevent the occurrence of partial image shading, etc. based on the image display, and by doing so, it is possible to display the time from the input of the image display command to the start of exposure writing in 6 cycles. This arrangement also provides the effect that the control sequence can be simplified compared to the case where it is not constant.

The gist of the present invention is to provide an endless belt-like image carrier that is driven intermittently, a means for forming an erasable image on the artist carrier, and a means for forming an erasable image on the artist carrier. In an image display device equipped with a display unit for viewing a formed image, the former determines the relationship between the moving length of the image carrier for forming and displaying the image and the length of the image carrier. The image display device is characterized in that it is set to be one integer fraction of the latter.

Embodiments of the present invention will be explained in more detail below based on the above-mentioned drawings.

In the display device shown in the drawings, from the time when the photoreceptor 8 starts rotating until the start of writing by the exposure,
Let the distance traveled by the photoreceptor 8 be the sub-rectangular distance t8, and the distance ktb (distance between part A and B in the figure) that the photoreceptor 8 moves from the exposure position A to the far end 3a of the window hole 3, then these distances ta, t
The sum t (= t, L + tb) of b is the distance that the photoreceptor 8 moves in a - image forming/display cycle, and in the present invention, the distance is The relationship t2441 of t is set to be 1/integer, and this summary will be described below along with the explanation of the operation of this device.

When the display key 22 of the operating section 21 is operated to input a command to display a rainbow, the drive source of the motor (not shown) starts rotating. The rotation is transmitted to the rollers 9 to 14F (by gears, chains, etc.), and as the rollers rotate, the photoreceptor 8 starts rotating in the direction of the arrow in the figure. At the same time, when a suitable known timer is used to detect that a preset time necessary and sufficient for the rotation speed of 8 to rise to a predetermined speed, that is, a run-up time has elapsed, the exposure 61 is The exposure writing operation using the laser beam at point A is started.The distance that the photoreceptor 8 travels within the run-up time is the run-up distance @1.As mentioned above, the photoreceptor 8 is The rotation at a predetermined speed is continued, and the exposure writing operation is continued.Then, the surface portion of the photoreceptor 8 corresponding to the surface area of the window hole 30, that is, the effective display area (length in the advancing direction is 12tc). ) As soon as the exposure writing is completed, the excitement stops due to the radar light. However, at this point, the rotation of the photoreceptor 8f continues completely. It should be noted that at the same time as the exposure writing is completed, the surface of the photoreceptor 80 is As the photoreceptor 8 continues to rotate, when the tip of the effective display area where the toner image is formed reaches the far end 3a of the window hole 3, it is properly positioned. The photoreceptor 8 is detected by a suitable detection means, and the photoreceptor 8 is stopped.In this state, a visible image can be displayed on the photoreceptor 8 through the window hole 3.

When changing the displayed content, the above-described operation may be repeated.

In this embodiment, the sum t (= ta + tb) of the distance tb on the photoreceptor 8 from the exposure position A to the far end 3a of the window hole 3 and the run-up distance tt of the photoreceptor 8 is Since the exposure position A is set at a position that is one integer fraction of the total length of the body 8, for example, when there is one or more image areas on the belt-shaped photoreceptor 8, the effective image Display area t. The same part of the photoreceptor 8 is always used repeatedly as an image area, and this image area is always used under approximately the same conditions (for example, the influence of external light, etc.). In order to use it, - picture 1M
VC that the effect of not causing problems such as poor image quality and the like at the portion θ at +'l can be obtained.

It should be noted that, as a further development of this embodiment, the present invention may be used for an endless belt-shaped image carrier 14c' having a more detailed structure as described below. In other words, as mentioned above, the image area of the belt that moves during the image forming/display cycle is always cut off into a narrow section.
It can be said that there is no particular need for the non-image area to be a photoreceptor.

Therefore, it is also possible to use a sheet-like photoreceptor having a thickness that can cover the effective display area tc, and to support the sheet-like photoreceptor with an endless belt-like support member made of a non-photoreceptor.

As described above, the image display device according to the present invention has the following features:
Is there a predetermined relationship between the total length of the belt of the carrier and the moving length of the belt for image formation/display? By giving it, you can get the excellent benefits mentioned above, and its usefulness is extremely unique.

[Brief explanation of drawings]

The drawing is a side view showing an image display device according to the present invention. 2: Display section 3 Two window holes 3a: Far end 4: Transparent member 5; Scanner 6: f/θ lens 7: Mirror 8: Belt-shaped photoreceptor (photoreceptor) 9 to 14: Roller 15: Genzuka device 16, Mineishi
17: Sleeve 18; Developer 19.
Grade 20, U/P 21: Operation section 22; Next key

Claims (1)

[Claims] an endless belt-shaped LLIII elephant carrier that is driven intermittently;
In the image display device, the image display device includes means for forming an entire erasable image on the image carrier V, and a display section for visually viewing the image formed on the image carrier V. The relationship between the moving length of the carrier for image formation and display and the length of the image carrier is established so that the former is an integer fraction of the latter! Image display device for +if acupuncture.