JPH02140793A - Picture display device - Google Patents

Abstract

PURPOSE:To perform the display where the resolution is preferred or the display requiring no internal illumination for reduction of power consumption on a display device of color display by forming a color display face having a light- transmissive color filter and a monochromatic display face having no color filters on a recording medium. CONSTITUTION:Plural display faces 6 including color display faces having light- transmissive color filters 7 (R, G, B) and monochromatic display faces having no color filters are formed on a recording medium 1. Color display faces having light-transmissive color filters are used for color display, but monochromatic display faces having no color filters are used when a high resolution is required or a picture is displayed with internal illumination stopped. Since not color display faces but monochromatic display faces are used when a high resolution of character information or the like is required, the resolution which is three times as high as that of the color display is obtained. Since it is unnecessary to alway use illumination at the time of the monochromatic display, the power consumption is reduced.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an image display device that forms an image on a movably provided recording medium to display a colored display, and particularly relates to a color display and a monochrome display. Regarding devices with a dedicated display surface.

[Prior Art] Conventionally, as an image display device for forming and displaying an image on a recording medium, devices as shown in FIGS. 4 and 5 have been devised.

First, the display sheet 31 as a recording medium is placed on the roller 32.
A sprite filter 34 as a light-transmitting color filter is integrally provided in the portion that becomes the display surface 33. This sprite filter 34 has red, green,
It is formed by sequentially arranging three blue color filters in the horizontal direction. Further, the cylindrical nonmagnetic sleeve 35 includes a rotating magnet 36 made of a permanent magnet, and is further provided with a recording electrode 37 to constitute a developer carrier. The image is displayed by attaching magnetic toner 38 to any position on the sprite filter 34 using the recording electrode 37, and by illuminating the display sheet 31 with an illumination lamp 40 from behind the back support plate 39 that holds the display sheet 31 in a planar manner. toner 31
The area to which it was attached became a dark spot, and a color display was made using the combined light of the other bright spots.

[Problems to be Solved by the Invention] In recent years, display devices have been required to have higher expressiveness, and in addition to color, higher resolution has also been required. However, colorization and high resolution are contradictory conditions, and color display requires three stripe filters 34 per pixel, so the resolution is reduced to one third compared to monochrome display. descend. Furthermore, in order to perform color display, it is necessary to brighten the stripe filters 34 that constitute the pixels, and it is not possible to obtain sufficient brightness with only reflected light from outside light. , illumination from behind the display surface 33 was essential. These are unavoidable when performing color display, and there is generally a tendency to prioritize the effect of color display over the resolution advantage of monochrome display, so we had no choice but to give up on this problem.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and its purpose is to improve resolution-prioritizing display and internal illumination for power saving in color display devices. The purpose is to enable display that does not require

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a display surface that is planar in the display section, and a recording medium that is movably provided with a desired display surface. Forming an image 1. In an image display device that performs display, a plurality of display surfaces including a color display surface having a translucent color filter and a monochrome display surface having no color filter were formed on the recording medium.

[Function] In the present invention having the above configuration, a color display surface having a translucent color filter is used when performing color display, and when high resolution is required or when internal illumination is stopped. When performing display, a monochromatic display surface without a color filter can be used to display a display according to the purpose of use.

[Example] An example of the present invention will be described with reference to FIGS. 1 and 2.

A display sheet 1 as a recording medium is provided to be movable in the vertical direction by the rotation of a roller 2, and within the rotation orbit of the display sheet 1 is a back support plate 3 that is transparent or has light diffusing properties, and provides internal illumination. An illumination lamp 4 is provided. This back support plate 3 is provided at a position corresponding to a screen 5 serving as a display section, and maintains the flatness of the display sheet 1 with respect to the screen 5. This display sheet 1 has a display surface 6 for two screens, including a color display surface 6a having a stripe filter 7 as a translucent color filter as shown in FIG.
The structure of the 0 display sheet 1 consists of a monochrome display surface 6b having no color, and a light-transmitting conductive layer such as indium tin oxide is provided on a base film such as polyethylene terephthalate, and a butyral resin is coated on the upper surface of the base film. A thin layer of acrylic resin or the like is used as a recording layer.

The stripe filter 7 is formed by printing ink in which a pigment is dispersed on a resin or by vapor depositing a pigment.
A filter 7R consisting of the three primary colors of light, red, green, and blue, is provided between the base film and the conductive layer or on the lower surface of the base film on the opposite side from the recording layer.

7G and 7B are formed by sequentially arranging them in the vertical direction.

The monochromatic display surface 6b without the stripe filter 7 is composed of a base film, a conductive layer, and a recording layer. In this case, the conductive layer can be made of a transparent material such as a thin metal layer by making the recording layer white or by providing a white low resistance layer between the recording layer and the conductive layer to increase the contrast of the recorded image. The developer carrier, which may be substituted with one having an inferior luminous index, has a recording electrode 10 provided on a cylindrical non-magnetic sleeve 9 containing a rotating magnet 8, which is made of a permanent magnet and serves as a magnetic field generating means. It is composed of The recording electrode 10 is connected to a drive circuit 11 that controls voltage based on an image signal, and the drive circuit 11 is further connected to a power source 12.

To form an image, the drive circuit 11 directs the recording electrode 10 to
This is done by applying a voltage corresponding to the image signal to cause the magnetic toner 14 in the developer container 13 to adhere to any position on the display sheet 1.

Next, an example of image display operation will be described.

In displaying a color image, each recording electrode 10 corresponds to one stripe as shown in FIG. The desired color is obtained by attaching it to the live filter and covering the desired color. When the color display surface 6a on which the image is formed is brought to the slurry 25 position by rotation of the roller 2, the color display surface 6a is held flat by the back support plate 3. Then, an image is projected onto a screen 5 and displayed in color by an illumination lamp 4 provided behind the back support plate 3. Here, if the position of the stripe filter 7 and the position of the recording electrode 1O deviate, a correct color image cannot be obtained. Therefore, in this embodiment, in order to prevent this color shift, ribs 15 are provided at both ends of the roller 2 to hold the display sheet 1 so that it does not shift, and if color shift occurs, it can be corrected. As such, the display sheet 1 and the rollers 2 can be moved and adjusted in the horizontal direction.

A monochromatic image is displayed by positioning the monochromatic display surface on which the image is formed on the screen 5, similarly to the display of a color image. At this time, internal illumination by the illumination lamp 4 is not necessarily required, unlike color display.

Next, another embodiment will be explained using FIG. 3.

The image display in this embodiment is obtained by doubling the pitch width of the stripe filter of the first embodiment shown in FIGS. 1 and 2. That is, since one stripe corresponds to two recording electrodes 10, it is easy to prevent misalignment between the stripe filter 7 and the image.

In this embodiment, color misregistration can be corrected by automatically detecting and correcting the color misregistration. For example, red color is obtained by attaching magnetic toner 14 to green and blue filters 7G and 7B. This is made possible by detecting the transmitted light from the illumination lamp 4 with a sensor sensitive only to red, and moving and adjusting the position of the display sheet 1 so that the amount of light is maximized. Furthermore, in the color shift correcting means of this embodiment, by intentionally shifting the relative position of the recording electrode IO and the stripe filter 7, a color change occurs, and a kind of image processing effect can be expected.

In this embodiment, the stripe filter 7 is arranged in the vertical direction, but it may be arranged in the horizontal direction as in the conventional example.
The present invention is not limited to a type that changes the transmittance or scattering rate of light, such as a non-luminous type such as electrochromy, thermosensitive recording, liquid crystal display, etc.

[Effects of the invention] By using a monochromatic display surface instead of a color display surface, in the case of displays that require high resolution, such as character information, three times the resolution can be obtained compared to conventional color displays. .

Furthermore, in the case of monochromatic display, it is not necessarily necessary to use illumination, so power saving can be achieved.

Furthermore, by changing the image formation position on the display sheet as a recording medium, it is possible to display a mixture of color display and monochrome display at will. It is also possible to utilize the advantages of each display, such as two-thirds displaying characters in a single color with high density.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing one embodiment of the present invention, FIG. 2 is a partial perspective view of an image forming portion in the same embodiment, and FIG. 3 is a partial perspective view of an image forming portion in another embodiment. FIG. 4 is a schematic sectional view showing a conventional example, and FIG. 5 is a partial perspective view of an image forming portion in the conventional example. Explanation of symbols 1...Display sheet as a recording medium 2...Roller 3...Back support plate 4...
- Illumination lamp 5... Screen 6 as a display section... Display surface 6a... Color display surface 6
b... Monochrome display surface 7.7R, 7G, 7B... Stripe fin 8 as a translucent color filter... Rotating magnet IO... Recording electrode 12... Power source 14... Magnetic toner 9...Nonmagnetic sleeve 11...Drive circuit 13...Developer container 15...Rib

Claims (1)

[Scope of Claims] An image display device that has a planar display surface in a display section and forms and displays a desired image on a movably provided recording medium, An image display device comprising a plurality of display surfaces including a color display surface having a translucent color filter and a monochromatic display surface having no color filter.