JP2674527B2 - Image display method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display method, and more particularly to an image display method for displaying color image information converted into an electrical signal as a visible image that can be visually recognized.

[0002]

2. Description of the Related Art Conventionally, as an image display device for displaying data such as a computer, a facsimile, a scanner, etc., a CRT, a liquid crystal display, a plasma display, an LED, etc.
2. Description of the Related Art There is known a device such as a display device which has no moving parts and operates only by electric means.

Further, a belt-shaped photoconductor or a dielectric is used as an image carrier, and a printing material such as toner is selectively adhered to the surface of the photoconductor or the dielectric according to the above data, and in some cases, weak fixing is performed. An image display device that displays an image in such a manner has been proposed and has been partially put into practical use.

Further, there has been proposed an image display device which uses a pixel constituent member including a printing material having a magnetic characteristic, and also displays an image by selectively reversing or moving the printing material according to the above data.

[0005] However, an apparatus that operates only by electrical means without a mechanically movable part is expensive in applications such as large-screen image display or temporary still image display.
Maintenance is troublesome, and its installation takes time.

Further, in an image display device using a belt-shaped photoconductor or a dielectric or an image display device using a pixel constituent member including a stamp having magnetic characteristics, a relatively large screen image or a still image is not displayed. Easy, but
There is a drawback that color display is not possible or the display surface is dark.

[0007] In addition, the use of a photoreceptor poses technical problems such as light resistance during display and characteristic deterioration associated therewith, manufacturing cost when the screen is enlarged, and uniform characteristics.

Accordingly, as a method of displaying a color image, a fine stripe or mosaic color pattern such as red, green and blue is provided on an image carrier on which an image is formed, and these color patterns are displayed. JP-A-59-2295 discloses a method for displaying a color image by appropriately covering the toner.
No. 78 discloses this.

Further, Japanese Patent Application Laid-Open No. 2-146019 proposes a color display device in which an optical filter and an electrophoretic display are combined. Further, Japanese Unexamined Patent Application Publication No.
Japanese Patent No. 146502 has a black matrix as a structure of a color filter for a liquid crystal display,
A transparent electrode is provided in a stripe shape independently in each row or column in the vicinity of each color pixel and black matrix pixel, and a large light-shielding conductivity is provided in a portion of the black matrix portion parallel to the stripe transparent electrode. It has been proposed to provide a portion having the same and an insulating portion, and it is said that the difference in image quality between the central portion and the peripheral portion when the screen is enlarged can be reduced at low cost.

[0010]

However, according to the method described in the above-mentioned Japanese Patent Application Laid-Open No. 59-229578,
Since the fixed needle electrodes are opposed to each color pattern to which a voltage is applied on the image carrier and the image carrier is accurately transferred to form an electrostatic image, and toner is attached. In addition, highly accurate alignment of each color pattern on the image carrier with the solid needle electrode is required.

Also, in the production of each color pattern on the image carrier, it is difficult and expensive to align the electrodes and the color pattern or to pass each color from the common electrode to each pattern when there are three or more colors. Met.

Techniques proposed and improved in order to solve such problems have been published. For example, JP-A-61
One of them is the technique disclosed in Japanese Patent Laid-Open No. 290479/1990, which is different from the technique disclosed in Japanese Patent Laid-Open No. 229578/1984 in that a photoconductive layer is used as an image carrier instead of a fixed needle electrode. It is intended to be electrostatically formed on the body by light, and to display a color image even if two or more types of narrow band light transmission filters are used and two or more types of corresponding light sources are combined. Is.

However, the above-mentioned JP-A-61-2904 is used.
As can be seen from the description of Japanese Patent Publication No. 79, the process becomes very complicated and expensive members are used, which cannot be put to practical use.

Further, Japanese Laid-Open Patent Publication No. 2-146019 discloses a technique in which an electrophoretic dispersion liquid is sealed with two substrates, at least one of which has a light-transmitting property, and it is extremely expensive and extremely difficult to manufacture a large screen with high precision. Have difficulty. In addition, there are problems in maintaining the life and uniform dispersion of the electrophoretic dispersion liquid. In addition, when an electric field is applied to each pixel, leakage of the electric field around the target pixel causes electrophoresis, which causes image blurring. There is an issue such as letting it happen. Furthermore, JP-A-2-146502
The color filter structure shown in No. 1 is for a liquid crystal display device, and it is basically difficult to put it into practical use from the viewpoint of cost and uniform production for a large screen of 1 m × 5 m. In addition, since a driving circuit is provided for each pixel, it is difficult to increase the screen size in this respect as well.

In addition to this, there is a proposal, and there is also a technique for forming a color image by selectively adhering toner to a dielectric image carrier having a striped pattern of each color having no electrodes in accordance with the pattern. is there.

However, this also requires highly accurate toner adhesion accuracy for each color pattern, so that running accuracy is difficult to maintain, especially when a belt-shaped image carrier is used. Further, since the toner is attached to the side having the color pattern, the durability in terms of color reproducibility remains questionable.

An object of the present invention is to solve the above-mentioned problems and to display data of a computer, a facsimile, etc. in a large screen in color,
Another object of the present invention is to provide an image display method capable of displaying clearly even in a dark place at low cost.

[0018]

According to the image display method of the present invention, at least two light-transmitting portions having a non-light-transmitting portion are provided.
A regular repeating pattern of three colors is formed, and a transparent electrode kept at a constant potential is in close contact with or facing each other except for one of the non-translucent part corresponding to each row or column. Using the plate-shaped translucent image carrier provided,
A non-translucent member is selectively attached to the image carrier by a recording head, and a color image is displayed by irradiating the translucent image carrier to which the non-transparent stamp material is adhered with a backlight. .

According to claim 2, the translucent image carrier is
At least a repeating pattern, a transparent electrode, and a transparent dielectric are laminated in this order.

According to the third aspect, the non-translucent printing material attached to the surface of the translucent image carrier is removed after the display.

According to the fourth aspect, the surface of the light-transmissive image carrier is cleaned prior to selectively adhering the non-light-transmissive printing material to the surface of the light-transmissive image carrier.

According to the fifth aspect, the potential of the transparent electrode is different when removing and cleaning the non-translucent printing material on the surface of the translucent image carrier and when attaching the non-transparent printing material.

According to the sixth aspect, the backlight is irradiated from the surface side of the translucent image bearing member having the repeating pattern.

According to the seventh aspect, the non-translucent printing material is attached to the surface of the translucent image carrier opposite to the surface having the repeating pattern.

According to the eighth aspect, the non-translucent portion of the repeating pattern is the black matrix.

According to the ninth aspect, the non-translucent printing material is reused.

According to claim 10, the potential of the transparent electrode is
Not only direct current but also alternating current is superposed.

[0028]

The image display method of the present invention has a regular repeating pattern of at least two colors having a light-transmitting property and having a non-light-transmitting portion, and corresponds to a row or a column of the light-transmitting portion. The transparent electrodes of the translucent image bearing member, in which the transparent electrodes are closely attached or opposed to each other except the portions, are maintained at a constant potential, and the recording head selectively does not transmit the light while corresponding to the repeating pattern. The non-translucent printing material is not attached by electrostatically adhering the printing material to the translucent image bearing material and irradiating the translucent image bearing material with the non-transparent printing material attached with a backlight. A color having the translucency of the repeating pattern corresponding to the portion is displayed, and various colors are displayed depending on the adhered state of the non-translucent printing material.

As described above, since the non-translucent portion, that is, the so-called black matrix portion is provided in the regular repeating color pattern, it is not necessary to improve the precision of the attachment position and size of the non-transparent stamp material, and the device design In addition, it is possible to reduce the transfer accuracy of the image carrier or the toner adhering means. In addition, since the side having the non-translucent portion and having the color pattern is illuminated by the backlight, faithful color reproduction is realized.

[0030]

Next, embodiments of the present invention will be described with reference to the drawings. (First Embodiment) FIG. 1 is a partial plan view showing the structure of a translucent image carrier used in the present invention. FIG. 1 shows a pattern formed on the surface of a glass substrate 11 (FIG. 2) which is a base material of the translucent image bearing member 10, in which translucent fine red R, green G and blue B The black non-translucent portions (black matrix) 12 are formed between these respective colors which are regularly and repeatedly arranged. The regular repetition shown here is a mosaic pattern arrangement.

FIG. 2 is a view showing a cross-sectional structure of the translucent image carrier 10 taken along the line AA 'in FIG.

Referring to FIG. 2, a transparent image carrier 10
Thin layers of red R, green G, and blue B are regularly and repeatedly arranged on the glass substrate 11 serving as the base material of the above, and the black matrix 12 is interposed between the respective colors. Also,
An overcoat layer 13 is formed on the thin layer of each color and the black matrix 12. Further, on the surface opposite to the surface on which the repeated pattern is formed on the glass substrate 11, the insulating resin portion 43 is provided on the stripe-shaped portion corresponding to the portion corresponding to the column of the black matrix 12 in FIG. A transparent electrode 42 is formed on the other portions, and a dielectric layer 14 as an electrostatic recording layer is further formed on the surface opposite to the glass substrate 11.

There are various methods for producing a repeated color pattern on the glass substrate 11, and broadly, an organic filter using an organic material as a coloring layer, an inorganic filter using an inorganic material, and a composite filter using a combination thereof are used. It is known how to do it.

As a manufacturing method using an organic filter, there are a dyeing method, a dispersion method, a printing method, an electrodeposition method and the like, and for an inorganic filter, a multilayer interference film method is known.

The size of each color of red R, green G and blue B is, for example, 80 to 200 μm, and in FIG.
An example of μm × 150 μm is shown. The spacing between the colors is about 30 to 50 μm.

The transparent electrode 42 is made of ITO (Indium).
Tin Oxide) or the like, and the insulating resin portion 43 is made of acrylic, polyester, polystyrene, or the like.

As the dielectric layer 14, a transparent resin layer made of PET (polyethylene terephthalate), polyethylene, polystyrene, polyester or the like having a thickness of 20 to 30 μm is used.

The surface of the glass substrate 11 opposite to the surface on which the repetitive pattern is formed, and the portion corresponding to the row of the black matrix 12 in FIG. Insulating resin is not provided.

Next, an image display method using the translucent image carrier thus constructed will be described.

FIGS. 3 (a), 3 (b) and 4 are schematic views for explaining the first embodiment of the image display method of the present invention, and the translucent image carrier shown in FIG. The view is from the same direction as the cross section.

Referring to FIGS. 3A, 3B and 4.
A predetermined potential (here, a negative potential) is applied to the transparent electrode 42 of the translucent image carrier 10 by the transparent electrode power source 44, and with respect to the dielectric layer 14, the surface having the dielectric layer 14 is The charges 40 are selectively applied according to the image data 17 in accordance with the position and size of each color pattern provided on the opposite surface, that is, the surface, and more charges are applied particularly to the portion facing the transparent electrode 42. As a result, black toner 41, which is a non-translucent printing material, is attached to the surface of the dielectric layer 14 to which the electric charge 40 has been applied.

Here, as an example of a method for selectively applying charges to the dielectric layer 14, an example using the contact type electrostatic head 15 is shown (FIG. 3A). The black toner 41 is a toner mainly used in polyester, polystyrene, and styrene-acrylic copolymer having a thickness of about 7 to 12 μm, which is used in a usual electrophotographic process.

In FIG. 3B, the toner 41 is attached to positions other than the green G pattern position on the reverse surface.

The adhesion of the toner 41 to the electric charge 40 applied to the surface of the dielectric layer charges the toner 41 to a polarity opposite to the polarity of the electric charge applied to the surface of the dielectric layer, and further the surface potential and the toner carrier 18 due to the applied charge. By forming an electric field by the applied bias (bias power supply 22 in FIG. 3), the toner 41 adheres only to the surface position of the dielectric layer to which the electric charge 40 is applied according to the image data 17.

Here, the dielectric layer 1 facing the transparent electrode 42.
Since the surface of No. 4 has a higher charge density than the surface of the dielectric layer 14 facing the insulating resin portion 43, a larger amount of toner 41 adheres to the surface of No. 4, which is advantageous for the light shielding effect.

The light-transmitting image carrier 10 to which the toner 41 is attached in this manner is then illuminated with a backlight from the side having the surface having each color pattern. There are various types of backlights, and there are incandescent lamps, LEDs, ELs, fluorescent lamps, flat fluorescent lamps, and the like.

FIG. 4 shows an example in which the cold cathode type lamp 23 of the fluorescent lamps is used.

Here, a structure is shown in which light sources are arranged at both ends of the transparent image carrier 10 and a transparent acrylic plate is used as the light guide 24. The surroundings of the light guide 24 and the fluorescent lamp 23 as a light source are covered with a reflector 25 so that light does not leak. For more effective and uniform illumination, the light guide 2
It is also an effective method to carry out a diffusion process on No. 4 or to provide a Fresnel prism, a multilayer thin plate or the like.

Irradiating the backlight from the side of the light-transmitting image carrier 10 having each color pattern is performed by bringing the backlight surface and the color pattern surface closer to each other, as can be seen from FIG. When the light passing through the portion is viewed from the side opposite to the backlight, the light passing through the color pattern portion corresponding to the portion shielded by the toner 41 is made as invisible as possible, and clear color reproduction can be performed. To do so.

In this way, in the translucent image bearing member 10 illuminated by the backlight, only the light that has passed through the green pattern can be seen when viewed from the side opposite to the backlight. Will be displayed in green.

After the display is completed, the toner 41 adhered on the dielectric layer 14 of the translucent image carrier 10 is removed by the elastic blade 36 such as urethane as shown in FIG. Further, the charge removing section 37 removes the residual charges on the dielectric layer 14. Thereby, the translucent image carrier 10
Is ready for use again.

When the toner is removed by the blade 36 and the charge is removed by the charge eliminator 37, a DC bias and an AC bias, which are opposite to those applied when the toner is attached, are superposed on the transparent electrode 42 and applied from the power source 44 '. As a result, the effect of removing the toner and the effect of eliminating the charge can be obtained. Further, it is possible to make uniform electrostatic conditions for the entire screen.

Further, in the toner removing step and the charge removing step as shown in FIG. 5, it is not necessary to immediately display the image,
It may be performed immediately before starting the next process for displaying another image.

This is because, in the present image display method, even if the toner is adhered onto the light-transmitting image carrier for a long period of time or is left standing, no particular problem occurs in the process. (Second Embodiment) FIG. 6 is a schematic sectional view showing a structure of a translucent image carrier used in the second embodiment of the present invention, taken along the line BB 'in FIG.

Referring to FIG. 6, a transparent image carrier 10
14 which is a light-resistant PET or the like as a base material of
Prior to forming the repetitive pattern on the surface, the transparent electrodes 42 and the insulating portions 43 are alternately formed in a stripe shape, and the red, green, and blue patterns are superposed on the upper surface thereof as shown in the figure, so that the pattern is regularly repeated. Pattern and 3
Non-translucent black matrix 12 in the color overlapping portion
'Is formed. Here again, the overcoat layer 13 is provided on each color pattern. In this case, the same member and manufacturing method as in the first embodiment are known as a method for forming each layer of the transparent electrode 42 and the insulating portion 43 and a color pattern manufacturing method, but a resin film is used as a transparent image carrier base material. The printing method is suitable for this.

The transparent electrodes 42 are adhered and laminated on the portions corresponding to the rows of the black matrix 12 'in FIG. 7 except the portions crossing the portions corresponding to the columns.

Since the dielectric layer 14 serves as a resin transparent image carrier base material, the base material itself can be used as a dielectric electrostatic recording layer.

The arrangement of each color pattern is a stripe type as shown in FIG.

The translucent image carrier 10 having such a structure is fixed in a plate shape by a peripheral frame, and a non-contact type electrostatic head 27 is attached to a surface having no color pattern on the surface as shown in FIG. Are brought close to each other, and the electric charge 40 is selectively applied to the surface according to the arrangement and size of the color pattern according to the image data 31.
give. Here, as in the first embodiment, the transparent electrode 4 is also used.
Since a predetermined potential is applied to the second electrode 2, a larger amount of electric charge 40 is applied to the portion facing the transparent electrode 42.

Here, the electric charge 40 is applied to positions other than the red pattern position. Next, a colored toner, which is a non-translucent printing material, is charged to the same polarity as the charge 40 selectively applied to the surface of the light-transmitting image carrier 10, and the surface to which basically no charge is applied is used. Attach colored toner to. FIG. 9 shows this state.

Also in this case, as in the first embodiment, an electric field is formed between the toner carrier 18 and the light-transmitting image carrier 10 to faithfully and sharply transfer and adhere the toner corresponding to the image data 31. Is realized.

In particular, the dielectric layer portion where the transparent electrode 42 is located on the back surface has a higher charge density than the other portions, so that toner adhesion hardly occurs and the background stain phenomenon does not occur.

Here, as the color toner, a gray toner having no translucency is used. This is because it is also possible to make the toner less noticeable at the time of fusing or infiltration into the portion due to flaws or deterioration due to repeated use of the resin image carrier.

Now, as shown in FIG. 10, the translucent image bearing member 10 to which the toner is selectively adhered is irradiated with white EL from the surface opposite to the toner adhering surface side so that the cyan light is emitted. A color image will be displayed.
The white EL emits light by applying a high electric field to the dielectric layer in which the powder phosphor is dispersed. This is because the toner adheres only to the portion corresponding to the red pattern position, so that the backlight light passes through the green pattern and the blue pattern, respectively, and the mixture of both colors results in a cyan color.

Incidentally, the EL as the backlight is also used here.
Is radiated from the surface opposite to the toner-attached surface.
This is due to the same reason as described in the above embodiment.

Although the white EL is used here as the EL, another color EL may be used if it has been studied in advance as the display color.

After the display or before the next different image forming step, the toner 41 adhered on the transparent image carrier 10 is displayed.
Is removed from above the image carrier 10 by a cleaning elastic blade 36 or a brush as shown in FIG. Further, the toner adhering surface of the translucent image carrier 10 is also neutralized.

Further, in the cleaning performed before the next different image forming step, not only the removal of the attached toner and the removal of the toner on the toner-attached surface, but also the cleaning or the removal of the backlight irradiation surface side is performed. Is effective for the next clear image formation and display.

Although the first and second embodiments have been described above, the transparent image carrier 1 used in the present invention.
The arrangement of the respective colors of the regular repeating color pattern of 0 is not limited to these, and the arrangement shown in the triangle type of FIG. 11 or the four-pixel arrangement type of FIG. 12 can be applied, of course. It is not limited to. The transparent electrode 42 is also provided in the first and second
The arrangement is not limited to the stripe-shaped arrangement in the portion corresponding to the column as described in the above embodiment, and in particular, in the pattern of FIG. 11, the transparent electrode arrangement in the portion corresponding to the row is effective. (Third Embodiment) As the light-transmissive image carrier used in the third embodiment, the same one as that used in the first embodiment is used. An output from the transparent electrode power source 44 ″ is applied to the transparent electrode.

Next, the image data 34 corresponding to the arrangement and size of each color pattern is formed on the translucent image carrier 10.
A developing device as shown in FIG. 13 is used to adhere the toner 41 according to the above.

This is not the process of selectively applying charge to the surface of the light-transmitting image carrier and attaching the charged toner corresponding to the charge state as shown in the first or second embodiment, but the developing device. A selective toner state is formed on the toner carrier 18 of the image carrier 10 and the toner 41 on the toner carrier 18 is batched at a position facing the image carrier 10.
It is to move to the side.

The selective toner layer for the developing toner carrier 18 is formed by changing the voltage applied to the developing blade 32, which is insulated and divided at each color pattern pixel pitch in the longitudinal direction of the developing blade 32 and the toner carrier. It is formed by changing the electric field between 18 and changing the charge amount and supply amount of the toner passing therethrough. Therefore, the transfer speed of the developing device with respect to the translucent image carrier 10 and the rotational peripheral speed of the toner carrier 18 are the same. In addition to the method of controlling the developing blade voltage shown here, a large number of fine width electrodes are provided on a fixed sleeve with a built-in rotating mag roll, and a selective toner layer is provided by controlling the power supply applied to each electrode. There are methods such as being transported.

The light-transmitting image carrier 10 with the toner thus attached is illuminated by a backlight using a fluorescent lamp as in the first embodiment, and an image is displayed. Then, after the display or before the next different image formation, the toner 41 is removed from the surface of the translucent image carrier 10.

In any of the above embodiments, the toner removed by removing the adhered toner after the display or before the next different image formation can be used again as the non-translucent printing material for adhesion.

As the backlight, an example of a fluorescent lamp or EL has been shown, but the invention is not limited to this, and an incandescent lamp, an LED or the like may be used as described above.

In each embodiment, the color pattern is three colors of red, green and blue, but this may be any other desired color, or any two colors. Four
A multicolor pattern such as five colors may be used.

However, there is an advantage that a full color image can be expressed by using the above three colors. Although the black toner and the gray toner are shown as examples of the non-translucent printing material, toners of other colors may of course be used in the case of patterns of other colors.

Furthermore, although the toner is shown as the non-translucent printing material, this is not only the powder toner but also the liquid toner,
High viscosity toner may be used.

The toner carrying method is not limited to the one-component developing method and may be the two-component developing method. Further, the toner may be conductive, insulating, magnetic, non-magnetic, or in any combination.

[0080]

As described above, according to the present invention, the following effects can be obtained. (1) Since the non-translucent part, that is, the so-called black matrix part is provided in the regular repeating color pattern, it is not necessary to improve the accuracy of the attachment position and size of the non-translucent stamp, and the device design and the image carrying are carried out. It is possible to reduce the transfer accuracy of the body or the toner adhering means. (2) The position accuracy of each color pattern can be reduced by having the non-translucent portion also in the production of the regular repeating pattern on the translucent image carrier substrate. (3) It is possible to easily realize the display of a full-color image by a simple process of simply attaching a non-translucent printing material of one color and a simple backlight irradiation. (4) Although the overcoat layer is provided on the surface having the color pattern, its planarity also has a problem in mechanical durability. Therefore, there is no need to attach or remove toner on that surface. By carrying out on the opposite side, the durability and color reproducibility of the image bearing member are excellent. (5) Since the side having the non-translucent portion and having the color pattern is illuminated by the backlight, faithful color reproduction is realized. (6) By removing the adhered toner after the display or before the next different image formation, the transparent image carrier and the toner can be used any number of times, and the running cost can be greatly reduced. . (7) Since the color pattern has a non-translucent portion, color reproduction and sharpness are excellent in image quality as compared with a color pattern having no non-translucent portion. There is no concern about insufficient luminance when displaying an image, since it is sufficient to cope with an increase in luminance within about 5% of the backlight light source, and there is no problem. (8) A transparent electrode is provided except for a portion corresponding to each row or each column of the non-translucent portion, and a predetermined potential is applied by attaching and removing the non-translucent stamp material and cleaning the transparent image carrier. By doing so, with respect to the image unevenness that is likely to occur when the transparent electrode is not provided, the non-translucent printing material is securely attached,
Prevents adhesion to unnecessary parts and ensures reliable removal. Furthermore, it has been possible to realize the uniformity of image quality, which has been a problem for larger screens up to now, especially in the central and peripheral areas. become. (9) By applying a bias in which not only a direct current but also an alternating current is superposed to the transparent electrode, the non-transparent printing material can be adhered, removed, and improved in cleaning property without scattering. (10) It is possible to reduce the amount of non-translucent printing material adhered to the portion corresponding to the non-translucent member in which the transparent electrodes are not closely attached or opposed to each other, and at the same time, increase the amount of adhering to the color pattern to improve the light shielding effect. You will be able to (11) Small screen to large screen can be easily realized,
Since it uses a backlight, it can be used day and night, outdoors and everywhere indoors. (12) Once the toner is attached, the image can be displayed for a long period of time without performing the image forming process again and without performing the subsequent device maintenance management.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a translucent image carrier (mosaic type) used in a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the translucent image bearing member taken along the line AA ′ of FIG. 1 and viewed in the direction of the arrow.

FIG. 3 is a diagram for explaining the first embodiment of the present invention, in which FIG. 3 (a) shows a process of applying an electric charge to the dielectric layer of the translucent image carrier using an electrostatic head. FIG. 3B is a cross-sectional view of the developing device for explaining the step of adhering toner to the dielectric layer image to which electric charges have been added.

FIG. 4 is a diagram for explaining the first embodiment of the present invention, which is a cross-sectional view of a step of irradiating a light-transmitting image carrier with a backlight.

FIG. 5 is a cross-sectional view for explaining a step of removing the toner attached on the dielectric layer after the end of the display in the first embodiment of the present invention.

FIG. 6 is a sectional view showing a translucent image carrier used in a second embodiment of the present invention.

FIG. 7 is a plan view of a translucent image carrier (striped type) used in the second embodiment of the present invention.

FIG. 8 is a cross-sectional view for explaining a process of forming an electrostatic latent image according to the second embodiment of the present invention.

FIG. 9 is a cross-sectional view illustrating a step of adhering a color toner to a surface to which no electric charge is applied in the second embodiment of the present invention.

FIG. 10 is a cross-sectional view for explaining a step of displaying a cyan image by irradiating a translucent image carrier with a white EL as a backlight in the second embodiment of the present invention.

FIG. 11 is a plan view showing another embodiment (triangle type) of the translucent image carrier.

FIG. 12 is a plan view showing still another embodiment (pixel arrangement type) of a translucent image carrier.

FIG. 13 is a cross-sectional view for explaining the third embodiment of the present invention.

[Explanation of symbols]

 10 Light-Transmissive Image Carrier 11 Glass Substrate 12, 12 'Black Matrix 13 Overcoat Layer 14 Dielectric Layer (PET) 15 Electrostatic Head 16 Electrostatic Head Controller 17 Image Data 18 Toner Carrier 19 Brush 21 Cleaner 22 Bias Power Supply 23 Fluorescent lamp (cold cathode) 24 Light guide 25 Reflector 27 Electrostatic head 28 Power supply for corona 29 Shield power supply 30 Control power supply 31 Image data 32 Developing blade 33 Developing blade voltage controller 34 Image data 35 Toner carrier power supply 36 For cleaning Elastic body blade 40 Electric charge 41 Toner 42 Transparent electrode 43 Insulating resin part 44, 44 ', 44 "Power source for transparent electrode

Claims (10)

(57) [Claims] 1. A regular repeating pattern of at least two colors having a light-transmitting property, which has a non-light-transmitting part, is formed, and either a part corresponding to each row or each column of the non-light-transmitting part is formed. A plate-shaped translucent image bearing member, in which transparent electrodes kept at a constant potential are in close contact with or opposite to each other, is used in a portion other than one side, and a non - translucent member is selected for the image bearing member in the recording head. Image display method in which a color image is displayed by irradiating the light-transmitting image carrier to which the non-light-transmitting stamp material is attached by a backlight. 2. The image display method according to claim 1, wherein at least the repeating pattern, the transparent electrode, and a transparent dielectric are laminated in this order on the translucent image carrier. 3. The image display method according to claim 1, wherein the non-translucent printing material attached to the surface of the translucent image carrier is removed after the display. 4. The surface of the translucent image bearing member is cleaned prior to selectively adhering the non-translucent stamp to the surface of the translucent image bearing member. Image display method described. 5. The electric potential of the transparent electrode is different when removing and cleaning the non-translucent printing material on the surface of the translucent image bearing member and when attaching the non-transparent printing material. Image display method. 6. The image display method according to claim 1, wherein the backlight is irradiated from the surface side of the translucent image carrier having the repeating pattern. 7. The image display method according to claim 1, wherein the non-translucent printing material is attached to a surface of the translucent image carrier opposite to the surface having the repeating pattern. . 8. The non-translucent portion of the repeating pattern is a black matrix.
Image display method described in item. 9. The non-translucent printing material is reused.
9. The image display method according to any one of 1 to 8. 10. The image display method according to claim 1, wherein not only direct current but also alternating current is superimposed on the potential of the transparent electrode.