JP2009230067A - Display medium and display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display medium wherein the degradation of image quality due to the reduction in precision of alignment among display elements is suppressed, and a display device. <P>SOLUTION: A display medium 10 having a plurality of display elements 16 laminated therein comprises: a display part 12 wherein the plurality of display elements 16 are laminated; a substrate 39 for connection provided with a plurality of terminals 37 for wiring correspondingly to each preliminarily divided unit, with a plurality of column electrodes 20 for applying a voltage to one pixel column displayed on the display part 12 as one unit; and a substrate 36 for connection provided with a plurality of terminals 32 for wiring correspondingly to each preliminarily divided unit, with a plurality of column electrodes 20 for applying a voltage to one pixel column displayed on the display part 12 as one unit. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display medium and a display device.

  In recent years, with the spread of personal computers and the development of the information society such as the Internet, the consumption of paper as so-called short-lived documents for the purpose of temporary browsing of electronic information has been increasing. Realization of a rewritable display medium instead of paper is desired for reasons such as conservation of the global environment such as resource protection and improvement of the office environment. In particular, a display medium using liquid crystal is known as a display medium that replaces paper having a memory property without a power source and capable of rewriting an image by an external device in a short time.

  As a display medium using this liquid crystal, a technique using a change in optical characteristics of a liquid crystal layer, which is generated by providing a liquid crystal layer between a pair of electrodes and forming an electric field between opposing electrodes, is known. Color display is realized by laminating a plurality of display elements each having a liquid crystal layer having different optical characteristics. As a driving method of such a display medium, the display element has a configuration in which line-shaped electrodes extending in a direction intersecting each other through a liquid crystal layer are arranged, and corresponds to an intersection portion where each line-shaped electrode intersects. A simple matrix system that selectively applies a voltage to each pixel area, with the area as a pixel area, and the like can be used. Image display is performed by sequentially applying a voltage according to image data to the area corresponding to each pixel. ing.

  Here, in the case of a configuration in which a plurality of display elements are stacked, it is necessary to align the positions of the pixels of the image displayed on each display element between the display elements, and high-level alignment is required. As a method of aligning the display elements, a method of aligning the end portions of the display elements, a method of forming an alignment mark in advance and performing optical alignment with this mark, etc. are used. It was difficult to put out, and productivity improvement was requested. In addition, when the liquid crystal panels are stacked, the operation of wiring connecting a driving circuit for driving the liquid crystal layer to each liquid crystal panel is complicated, and improvement in productivity has been demanded.

For example, Patent Document 1 is known as a technique for realizing improvement in productivity of the display medium. According to the technique of Patent Document 1, a plurality of liquid crystal layers are provided between a plurality of substrates stacked in the thickness direction, and a plurality of electrode wirings for applying a voltage to each liquid crystal of the plurality of liquid crystal layers The terminal portions are arranged so as to be displaced stepwise on the side edges of the substrate of the liquid crystal display layer.
JP 2002-72243 A

  In the above prior art, improvement in productivity due to wiring connection work has been improved, but the improvement in alignment accuracy between display elements has not yet reached a satisfactory level, and the alignment accuracy has decreased. The present situation is that there is a concern about the deterioration of the image quality of the display image due to the above, and further improvement is desired.

  An object of the present invention is to provide a display medium and a display device in which deterioration in image quality due to a decrease in alignment accuracy between display elements is suppressed.

  The above-mentioned subject is achieved by the following present invention. That is,

  The invention according to claim 1 is a display substrate, a back substrate disposed opposite to the display substrate with a gap, and a plurality of linear row electrodes provided on the display substrate side and arranged in a predetermined direction. A plurality of linear column electrodes arranged on the back substrate side and arranged in a crossing direction intersecting the arrangement direction of the row electrodes, and the row electrodes provided between the display substrate and the back substrate A plurality of display elements including a liquid crystal layer whose optical characteristics change according to an electric field formed between the column electrodes and the liquid crystal layers included in the plurality of display elements have different optical characteristics from each other. A plurality of columns that are connected to one end in the longitudinal direction of the plurality of column electrodes of each of the display elements and apply a voltage to the same pixel column of an image displayed on the display unit. Each unit divided in advance into units consisting of electrodes A first connection portion having a plurality of first terminal portions, and one end portion in a longitudinal direction of each of the plurality of row electrodes of each of the display elements, and the plurality of row electrodes are displayed on the display portion. And a second connection portion having a plurality of second terminal portions provided in correspondence with each unit divided into units each composed of a plurality of row electrodes for applying a voltage to the same pixel row of the image to be displayed. It is a medium.

  According to a second aspect of the present invention, there is provided a voltage that is connected to the display medium according to the first aspect, the first terminal portion and the second terminal portion, and applies a voltage between the row electrode and the column electrode. And an application unit.

  According to the first aspect of the invention, it is possible to improve the alignment accuracy between the display elements, and to suppress the deterioration of the image quality due to the decrease in the alignment accuracy.

  According to the second aspect of the present invention, it is possible to improve the alignment accuracy between the display elements and to suppress the image quality deterioration due to the decrease in the alignment accuracy.

  An embodiment of a display medium and a display device of the present invention will be described with reference to the drawings.

<Display medium>
As shown in FIG. 1, the display medium 10 according to the present embodiment includes a display unit 12 in which a plurality of display elements 16 are stacked and a connection substrate unit 14.

  In the present embodiment, four display elements 16 of a display element 16R, a display element 16G, a display element 16Y, and a display element 16B are sequentially stacked via the adhesive layer 31 as the plurality of display elements 16. Although a case will be described, it is only necessary to have a configuration in which two or more display elements 16 are stacked, and the present invention is not limited to such a form.

  The display element 16R has a configuration in which a row electrode 22R, a liquid crystal layer 30R, and a column electrode 20R are sequentially stacked between a display substrate 18R and a back substrate 24R. A gap member 26R holds the display substrate 18R and the back substrate 24R.

  The display element 16G, the display element 16Y, and the display element 16B are configured similarly to the display element 16R. Specifically, the display element 16G has a configuration in which the row electrode 22G, the liquid crystal layer 30G, and the column electrode 20G are sequentially stacked between the display substrate 18G and the back substrate 24G. 24G is held by a gap member 26G. The display element 16Y has a configuration in which a row electrode 22Y, a liquid crystal layer 30Y, and a column electrode 20Y are sequentially stacked between the display substrate 18Y and the back substrate 24Y. The gap is held by the gap member 26Y. The display element 16B has a configuration in which a row electrode 22B, a liquid crystal layer 30B, and a column electrode 20B are sequentially stacked between the display substrate 18B and the back substrate 24B. The gap is held by the gap member 26B.

  In the following description, when the members are collectively described, the symbols R, G, B, and Y are omitted.

  The display medium 10 corresponds to the display medium of the present invention, the display section 12 corresponds to the display section of the display medium of the present invention, and the connection substrate section 14 corresponds to the first connection section of the display medium of the present invention. And corresponds to the second connecting portion. The display element 16 corresponds to the display element of the display medium of the present invention.

The display substrate 18, the back substrate 24, and the adhesive layer 31 have insulating properties (volume resistance of 10 ¹² Ωcm or more, the same applies hereinafter). Further, the display substrate 18, the back substrate 24, and the adhesive layer 31 have translucency. Note that in this embodiment mode, the light-transmitting property indicates a property of transmitting 80% or more of light having a wavelength of 380 nm to 780 nm.

  The liquid crystal layer 30 has a function of modulating a selective reflection state and a transmission state of light of a specific color by an electric field, and is a layer having a property that the selected state is maintained without an electric field. Each of the liquid crystal layer 30R, the liquid crystal layer 30G, the liquid crystal layer 30Y, and the liquid crystal layer 30B provided in each of the display elements 16R, 16G, 16Y, and 16B has different optical characteristics. Have. Note that the different optical characteristics indicate that the hues when they are modulated from the transmissive state to the selective reflection state by the formation of an electric field are visually different from each other. That is, when each of the liquid crystal layer 30R, the liquid crystal layer 30G, the liquid crystal layer 30Y, and the liquid crystal layer 30B is in a selective reflection state of a specific color due to an electric field, the selective reflection wavelength region is different. Light is selectively reflected.

  Each of these liquid crystal layers 30 uses a PDLC (Polymer Dispersed Liquid Crystal) structure in which chiral nematic liquid crystal (cholesteric liquid crystal) is dispersed in a gelatin binder (polymer matrix). In this embodiment, the case where each of the liquid crystal layers 30 adopts a PDLC structure will be described. However, the present invention is not limited to this structure, and a cholesteric liquid crystal is arranged in a cell having a fixed interelectrode distance via a rib. You may implement | achieve by making into capsule liquid crystal. Further, the liquid crystal is not limited to the cholesteric liquid crystal, but a smectic A liquid crystal, a nematic liquid crystal, a discotic liquid crystal, or the like is also used.

  In order to satisfy the above characteristics, for example, the liquid crystal layer 30 may include a cholesteric liquid crystal that selectively reflects B (blue) light, a cholesteric liquid crystal that selectively reflects G (green) light, and an R (red) color. A cholesteric liquid crystal or the like that selectively reflects can be used. With such a configuration, good color display is realized.

As shown in FIGS. 1 and 2, the column electrode 20 provided in the display element 16 is a line-shaped (strip-shaped) electrode extending in the column direction (the vertical direction in the drawing in FIG. 2), and the display substrate 18. A plurality of regions are provided in a region over the entire surface facing the rear substrate 24 on the side. The plurality of column electrodes 20 are arranged at predetermined intervals in the row direction so as to be parallel to each other at predetermined intervals.
The row electrode 22 is a line-like electrode extending in the row direction (the left-right direction in FIG. 2, that is, the direction orthogonal to the longitudinal direction of the column electrode 20). A plurality of areas are provided over the entire area of the opposing surfaces. The plurality of row electrodes 22 are arranged so as to be parallel to each other at a predetermined interval in an orthogonal direction (that is, the column direction) orthogonal to the arrangement direction of the column electrodes 20.

  The row electrode 22 applies a voltage to at least pixels constituting the same row (hereinafter, referred to as the same pixel row) among a plurality of pixels constituting an image displayed on the display unit 12. Are arranged at a predetermined interval so that the number of is at least two or more. Similarly, the column electrode 20 applies a voltage to at least pixels constituting the same column (hereinafter, referred to as the same pixel column) among a plurality of pixels constituting an image displayed on the display unit 12. The column electrodes 20 are arranged at predetermined intervals so that the number of the column electrodes 20 is at least two or more.

The diameters and arrangement intervals of the row electrodes 22 and the column electrodes 20 are the same from the viewpoint of improving the alignment accuracy between the pixels when the display unit 12 is configured by stacking the plurality of display elements 16. Is preferred. Further, it is preferable that the diameters and the arrangement intervals of the row electrodes 22 and the column electrodes 20 are the same among the plurality of display elements 16.
The arrangement interval between the row electrodes 22 and the column electrodes 20 is preferably the same as the distance between the wiring terminals 32 and between the wiring terminals 37.

Note that the row electrode 22 and the column electrode 20 have five or more row electrodes 22 for one pixel region, although depending on the size of each pixel in the image to be displayed on the display unit 12. The column electrode 20 preferably corresponds to 10 or more row electrodes 22 and the column electrodes 20 more preferably correspond to each other.
As described above, the diameter and the arrangement interval of the row electrodes 22 and the column electrodes 20 depend on the size of each pixel in the image to be displayed on the display unit 12 as described above. The distance between adjacent electrodes may be adjusted to 5 μm to 15 μm or the like.

  These display elements 16 are driven by a so-called simple matrix system. For this reason, the optical characteristics of the portion of the liquid crystal layer 30 located in the intersecting region change according to the potential difference (that is, the magnitude of the electric field) in the region where the row electrode 22 and the column electrode 20 intersect. Thus, a color corresponding to the liquid crystal layer 30 is presented. And when the display part 12 is visually recognized from the visual recognition direction (arrow Z direction in FIG. 1) side, the mixed color of the some liquid crystal layer 30 (the liquid crystal layer 30R, the liquid crystal layer 30G, the liquid crystal layer 30Y, and the liquid crystal layer 30B). Is visually recognized as the color of the display unit 12.

  The column electrode 20 and the row electrode 22 may be covered with an insulating material.

  The connection substrate portion 14 is provided in each of the plurality of display elements 16 constituting the display portion 12. As shown in FIG. 2, the connection substrate section 14 includes a connection substrate 36 provided at the end in the longitudinal direction of the row electrode 22 of the display element 16 and the longitudinal direction of the plurality of column electrodes 20 of the display element 16. And a connection substrate 39 provided at the end.

  The connection substrate 36 and the connection substrate 39 as the connection substrate section 14 are configured separately from the display element 16, and each display element 16 is manufactured in the manufacturing process of the display medium 10 to be described in detail later. The column electrodes 20 are fixed so as to be electrically connected to the longitudinal ends of the column electrodes 20 and the longitudinal ends of the row electrodes 22 of the display elements 16.

  As shown in FIGS. 2 and 3, the connection substrate 36 has a configuration in which a plurality of wiring terminals 32 are arranged on the substrate 34 in the arrangement direction of the row electrodes 22. Each of the plurality of wiring terminals 32 has an arrangement direction length (in the direction of arrow X in FIG. 2) (the same as the arrangement direction length of the row electrode 22 when attached to the display element 16). 22, the arrangement direction lengths between the wiring terminals 32 are the same, and the distances between the wiring terminals 32 are the same. Specifically, the length of each wiring terminal 32 in the arrangement direction is such that a plurality of row electrodes 22 are applied as a unit to a plurality of row electrodes 22 that apply a voltage to the same pixel row displayed on the display unit 12. A length corresponding to each unit divided in advance is set. For this reason, each wiring terminal 32 is configured to be able to supply a voltage supplied from the writing device 13 described later for each of the plurality of row electrodes 22 belonging to each corresponding unit.

  For example, as shown in FIG. 4, the arrangement direction length of each wiring terminal 32 is determined to be the same as the arrangement direction length of 13 column electrodes 20 provided in the display element 16. If the display substrate 10 is manufactured, the connection substrate 14 is attached to the display unit 12 so that the 13 column electrodes 20 correspond to form one pixel row. It becomes the composition which did.

  Similarly, as shown in FIGS. 2 and 3, the connection substrate 39 has a configuration in which a plurality of wiring terminals 37 are arranged on the substrate 38 in the arrangement direction of the column electrodes 20. Each of the plurality of wiring terminals 37 has a length in the arrangement direction of the column electrodes 20 when attached to the display element 16 so as to cover at least the plurality of column electrodes 20, and a length in the arrangement direction. Are configured to be the same. Specifically, the length in the arrangement direction of the column electrodes 20 when the connection substrate 39 is attached to the display element 16 of each wiring terminal 37 is displayed on the display unit 12. A plurality of column electrodes 20 that apply a voltage to the same pixel column are set as a unit, and the length corresponding to each unit is divided in advance. For this reason, each wiring terminal 37 is configured to be able to supply a voltage supplied from the writing device 13 described later for each of the plurality of column electrodes 20 belonging to each corresponding unit.

  For example, as shown in FIG. 4, the arrangement direction length of each wiring terminal 37 is determined to be the same as the arrangement direction length of 13 row electrodes 22 provided in the display element 16. When the display medium 10 is manufactured, the connection substrate 14 is attached to the display unit 12 and the 13 row electrodes 22 correspond to form one pixel row. It becomes the composition which did.

For example, as shown in FIG. 4, in a state after being configured as the display medium 10, the wiring terminal 37 is provided for each unit of the plurality of column electrodes 20 that applies a voltage to the same pixel column, The wiring terminal 37 ₁ to the wiring terminal 37 _n (n is an integer of 2 or more). The plurality of wiring terminals 37 ₁ to 37 _n are arranged along the arrangement direction of the plurality of column electrodes 20 on the substrate 38.
For example, the pixel region 74 ₁ and the pixels arranged as the same pixel column in the region 74 (in FIG. 4, the pixel region 74 ₁ to the pixel region 74 ₄ ) corresponding to each pixel of the image displayed on the display unit 12. as the voltage at the same time the same voltage value to the region 74 ₂ is applied, the column electrodes of which can apply a voltage to the pixel region 74 ₁ and the pixel region 74 _{and second} pixel columns (13 this is the example shown in FIG. 4) 20 is defined as a unit, with respect to the column electrodes 20 1 _to column electrodes 20 ₁₃ constituting the unit, one interconnection terminal 37 ₁ is in the state of being electrically connected. Similarly, as the pixel region ₇₄₃ and the pixel regions 74 ₄ column electrodes 20 of the application can be a unit voltage to the pixel column, the column electrodes _{20 14} to column electrodes _{20 26,} wiring terminal 37 ₂ is electrically It is in a connected state.

Therefore, by the voltage from the writing device 13 to be described later to the wiring terminal 37 ₁ is applied, the voltage is the same timing of the same voltage value to the column electrodes 20 ₁ to 20 ₁₃ which are connected to the wiring terminal 37 ₁ Is applied. In addition, the voltage from the writing device 13 to the wiring terminal 37 ₂ is applied, a voltage of the same voltage value is applied at the same timing to the column electrodes 20 _{14-20 26} connected to the wiring terminal 37 ₂ The

  Similarly, the wiring terminals 37 are connected to the other column electrodes of the plurality of column electrodes 20 in the same units.

Similarly, for the wiring terminal 32, for example, as shown in FIG. 4, in the state after being configured as the display medium 10, the wiring terminal 32 has a plurality of row electrodes 22 for applying a voltage to the same pixel row. Are provided for each unit, and are constituted by a plurality of wiring terminals 32 ₁ to 32 _n (n is an integer of 2 or more). The plurality of wiring terminals 32 ₁ to 32 _n are arranged along the arrangement direction of the plurality of row electrodes 22 on the substrate 34.

For example, the pixel region 74 ₁ and the pixels arranged in the same pixel row in the region 74 (in FIG. 4, the pixel region 74 ₁ to the pixel region 74 ₄ ) corresponding to each pixel of the image displayed on the display unit 12. as the voltage at the same time the same voltage value to the region ₇₄₃ is applied, the row electrodes of capable of applying a voltage to the pixel columns of the pixel region 74 ₁ and the pixel region ₇₄₃ (thirteen in the example shown in FIG. 4) 22 is defined as one unit, and one wiring terminal 32 ₁ is electrically connected to the row electrode 22 ₁ to the row electrode 22 ₁₃ constituting this unit. Similarly, as the pixel region 74 ₂ and the pixel region 74 _fourth row electrodes 22 of the application can be a unit voltage to the pixel rows, the row electrodes _{22 14} to row electrode _{22 26,} wiring terminal 32 ₂ is electrically It is in a connected state.

For this reason, when a voltage is applied to the wiring terminal 32 _{1 from} the writing device 13, voltages having the same voltage value are applied to the row electrodes 22 _{1 to} 22 ₁₃ connected to the wiring terminal 32 ₁ at the same timing. Is done. In addition, the voltage from the writing device 13 to the wiring terminal 32 ₂ is applied, a voltage of the same voltage value is applied at the same timing to the row electrodes 22 _{14-22 26} connected to the wiring terminal 32 ₂ The

  Similarly, the wiring terminals 32 are connected in units of the same for the other column electrodes among the plurality of row electrodes 22.

<Manufacturing method of display medium>
In the display medium 10 having such a configuration, after the plurality of display elements 16 are stacked to form the display unit 12, the connection substrate unit 14 is sequentially attached to each of the display elements 16 included in the display unit 12. Consists of.

  Specifically, as shown in FIGS. 5 and 6, first, the display element 16G, the display element 16Y, and the display element 16B are sequentially stacked on the display element 16R via the adhesive layer 31, and the display unit 12 is thereby formed. Make it.

  In the present embodiment, as shown in FIG. 5 to FIG. 11, the side edges of the plurality of display elements 16 to be stacked and the row electrodes 22 stacked on the back substrate 24 and the back substrate 24. Each of the side edge portions of the column electrodes 20 protrudes from between the display substrates 18 of the plurality of stacked display elements 16.

Specifically, as shown in FIG. 6A and FIG. 6B, the side edge portions of the row electrodes 22 stacked on the back substrate 24 and the back substrate 24 of each of the plurality of display elements 16 are as follows. When the plurality of display elements 16 are stacked, the display elements 16 are shifted in a stepped manner from the lower display element 16 toward the upper display element 16 in a stepwise manner. .
Further, as shown in FIGS. 6A and 6C, each of the plurality of display elements 16 has a plurality of side substrates and a plurality of side edges of the column electrode 20 stacked on the back substrate 24. When the display elements 16 are stacked, the display elements 16 are configured to be displaced stepwise from the lower display element 16 toward the upper display element 16 in a stepwise manner.

Next, the connection substrate is connected to the display element 16R provided on the lowermost layer side of the display unit 12 in which the display element 16R, the display element 16G, the display element 16Y, and the display element 16B are sequentially stacked. The part 14 is attached. Specifically, as shown in FIGS. 6A and 7, the side of the connection substrate 36 on which the wiring terminals 32 are provided has a conductive adhesive layer (not shown) on the row electrode 22B of the display element 16R. The connection board 36 is installed so as to face each other.
At this time, as described above, the plurality of wiring terminals 32 provided on the substrate 34 of the connection substrate 36 are provided for each unit of the plurality of row electrodes 22 for applying a voltage to the same pixel row. The connection substrate 36 is arranged so that the arrangement direction of the plurality of wiring terminals 32 provided on the substrate 34 matches the arrangement direction of the row electrodes 22. Thus, each of the wiring terminals 32 is easily electrically connected corresponding to each unit of the plurality of row electrodes 22 that apply a voltage to the same pixel row.

  Next, as shown in FIG. 6B and FIG. 8, the connection substrate 36 disposed on the display element 16G is added to the display element 16G stacked on the display element 16R on which the connection substrate 36 is disposed. The same connection substrate 36 is prepared, and these connection substrates 36 are arranged.

At this time, the positions of the respective wiring terminals 32 on the connection substrate 36 disposed on the display element 16R and the respective wiring terminals 32 on the connection substrate 36 disposed on the display element 16G are matched. Laminate to. This alignment may be performed by disposing the connection substrate 36 on the display element 16G so that the end of the connection substrate 36 disposed on the display element 16R matches the corresponding end. Alternatively, the alignment mark 40 may be provided on each connection board 36 in advance, and the alignment may be performed using the alignment mark 40.
When the alignment mark 40 is used, for example, as shown in FIG. 11, the position of the alignment mark 40 on the connection substrate 36 disposed on the lower display element 16 and the upper display element 16 are displayed. Each of the wiring terminals on the connection substrate 36 disposed on the display element 16R can be easily arranged by aligning with the position of the alignment mark 40 of the connection substrate 36 disposed on the display element 16R. Lamination is easily performed so that the positions of the wiring terminals 32 on the connection substrate 36 disposed on the display element 16G coincide with each other.

  As described above, the plurality of wiring terminals 32 provided on the substrate 34 of the connection substrate 36 are provided for each unit of the plurality of row electrodes 22 for applying a voltage to the same pixel row. The plurality of wiring terminals 37 provided on the substrate 38 of the connection substrate 39 are arranged in a predetermined direction, and are provided for each unit of the plurality of column electrodes 20 for applying a voltage to the same pixel column. Since the electrodes are arranged in a predetermined direction on the substrate 38, the display element 16R and the display element 16R are arranged by arranging the connection substrate 36 and the connection substrate 39 on the display element 16G with simple alignment as described above. A configuration in which the display element 16G on the display element 16R is easily provided without causing a positional shift between the pixels with respect to 16G.

  Next, similarly for the display element 16Y stacked on the display element 16G and the display element 16B stacked on the display element 16Y, the connection substrate 36 and the connection substrate disposed on the lower display element 16 are connected. Alignment with each of the substrates 39 is performed, and the connection substrate 36 and the connection substrate 39 may be disposed (see FIG. 6B and FIGS. 8 to 10).

  Although details are omitted, as shown in FIG. 6B, the side of the connection substrate 39 on which the wiring terminal 37 is provided is similarly connected to the column electrode 20B of the display element 16B. The wiring substrate 39 is placed so as to face each other through a conductive adhesive layer (not shown), and the arrangement direction of the plurality of wiring terminals 37 provided on the substrate 38 is the arrangement direction of the column electrodes 20. By arranging the connection substrates 39 so as to coincide with each other, each of the wiring terminals 37 is easily electrically connected corresponding to each unit of the plurality of column electrodes 20 for applying a voltage to the same pixel column. Will be.

  Similarly, the positions of the wiring terminals 37 on the connection board 39 disposed on the display element 16B and the wiring terminals 37 on the connection board 39 disposed on the display element 16Y coincide with each other. In this way, the connection substrate 39 may be disposed on the display element 16Y by performing alignment in the same manner. Similarly, for the display element 16G and the display element 16R, the wiring terminals 37 on the connection substrate 39 that are already provided and the connection provided on the display element 16 to be provided with the connection substrate 39 are provided. Similar connection is performed so that the positions of the wiring terminals 37 on the circuit board 39 coincide with each other, so that the connection substrates 39 may be sequentially disposed on the display elements 16 (FIG. 6C )reference).

  Thus, as shown in FIG. 11, the display unit 12 having a configuration in which a plurality of display elements 16R, display elements 16G, display elements 16Y, and display elements 16B are sequentially stacked is connected to each display element 16. The display medium 10 is configured by arranging the substrate 36 and the connection substrate 39.

  In the related art, when the display medium 10 is configured by laminating a plurality of display elements 16, when configured as the display medium 10, areas corresponding to pixels of an image displayed on each display element 16 are provided. In order to match, it is necessary to stack the column electrodes and the row electrodes provided in each display element 16 while accurately aligning them, and there is a possibility that the region corresponding to the pixels may be shifted, and there is a concern about image quality deterioration. It had been.

  However, in the display medium 10 according to the present embodiment, a plurality of regions are previously stored so that a region corresponding to each pixel of the image displayed on the display element 16 includes a plurality of row electrodes 22 and a plurality of column electrodes 20. The row electrode 22 and the plurality of column electrodes 20 are provided in the display element 16, and after the display unit 12 is manufactured by stacking the plurality of display elements 16, the connection provided with the plurality of wiring terminals 32 is provided. After the connection substrate 39 provided with the wiring substrate 36 and the plurality of wiring terminals 37 is disposed on the display element 16 stacked on the lowermost layer side, the display substrate 16 is sequentially stacked on the upper layer side. The display medium 10 is manufactured by aligning the connection substrate 36 disposed on the lower display element 16 and disposing each of the connection substrate 36 and the connection substrate 39.

  As described above, in the display medium 10 of the present embodiment, the display unit 12 and the connection substrate unit 14 are configured as separate bodies, and each row electrode 22 of each of the plurality of display elements 16 is manufactured in the manufacturing process. In addition, the display medium 10 is not manufactured while aligning the column electrodes 20, but simply from the lower layer side or the upper layer side to the upper layer side or the lower layer side on the display unit 12 manufactured by laminating the plurality of display elements 16. The connection substrate 36 and the substrate 36 are aligned while being aligned sequentially (from the lower layer side to the upper layer side when provided on the row electrode 22 side, and from the upper layer side to the lower layer side when provided on the column electrode 20 side). Since the display medium 10 is manufactured by arranging each of the connection substrates 39 in order, as a result, the display medium 10 in which the positional deviation between the pixels of the display element 16 is suppressed is easily manufactured. The

  In the present embodiment, the plurality of display elements 16 are stacked on each of the back substrate 24, the side edge portion of the row electrode 22 stacked on the back substrate 24, and the column electrode 20. Since the display element 16 is shifted from the lower display element 16 toward the upper display element 16 in a stepped manner, the lower display element 16 is disposed on the lower display element 16 or the upper display element 16. The alignment of the upper-layer-side or lower-layer-side connection substrate 36 and connection substrate 39 with respect to the connected connection substrate 36 and connection substrate 39 is facilitated.

<Display device>
Next, the display device 11 including the display medium 10 will be described. FIG. 12 is a block diagram showing an electrical configuration of the display device 11 according to the present embodiment.

  The display device 11 includes the display medium 10 described above and the writing device 13. The writing device 13 is provided with a slot (not shown) for mounting the display medium 10, and the display medium 10 is mounted in this slot (not shown).

  The writing device 13 includes a connector 64, a connector 65, a row electrode driving circuit 68, a column electrode driving circuit 66, a sequencer 70, and an image input device 72. The connector 65 and the column electrode drive circuit 66 are connected so as to be able to exchange signals, and the connector 64 and the row electrode drive circuit 68 are connected so as to be able to exchange signals. The row electrode drive circuit 68 and the column electrode drive circuit 66 are connected to the sequencer 70 so as to be able to exchange signals, and the sequencer 70 is connected to the image input device 72 so as to be able to exchange signals.

When the display device 11 is mounted in a slot (not shown), each of the plurality of display elements 16 of the display medium 10 is electrically connected to the writing device 13.
Specifically, the row electrode 22 of each display element 16 is electrically connected to the row electrode driving circuit 68 via a wiring terminal 32 that is different for each unit corresponding to each pixel row, and the column electrode of each display element 16 is connected. 20 is electrically connected to the column electrode drive circuit 66 by the connector 65 via the wiring terminal 37 that is different for each unit corresponding to each pixel column.

  The column electrode drive circuit 66 and the row electrode drive circuit 68 are each connected to a sequencer 70 and an external power supply (not shown). The sequencer 70 is connected to the image input device 72 and outputs a signal to the column electrode drive circuit 66 and the row electrode drive circuit 68 in accordance with image information input from the image input device 72.

  In such a display device 11, an image writing signal (scanning signal) for each wiring terminal 32 and wiring terminal 57 of each display element 16 is sent from the sequencer 70 to the row electrode driving circuit 68, and the row electrode driving circuit 68. 68 to the image writing voltage (hereinafter referred to as scanning) for each unit of the row electrode 22 and the column electrode 20 corresponding to each pixel row via each wiring terminal 32 and each wiring terminal 37 of each display element 16. Voltage) is applied sequentially.

At the same time, in synchronization with the application of the scanning voltage sequentially applied to each unit of the row electrode 22 and the column electrode 20 corresponding to each pixel row, it is connected to each wiring terminal 32 and each wiring terminal 37 to which the scanning voltage is applied. An image information signal corresponding to the row electrode 22 and the column electrode 20 is sent from the sequencer 70 to the column electrode drive circuit 66.
The column electrode drive circuit 66 applies an image writing voltage (hereinafter referred to as an image signal voltage) according to image information via each wiring terminal 32 and wiring terminal 37 to each of the column electrodes 20 and rows connected thereto. Apply all at once to the electrode 22. Similarly, a desired image is displayed on the display medium 10 by sequentially applying a voltage in the scanning direction (row direction).

  Here, as described above, since the display medium 10 is precisely aligned between the pixel regions of the plurality of display elements 16, the positional deviation of each pixel of the image displayed on the display medium 10 is suppressed. Image quality deterioration is suppressed.

It is a schematic diagram which shows an example of the display medium in embodiment of this invention, and is AA sectional drawing of the display medium shown in FIG. It is a schematic diagram which shows an example of the display medium in embodiment of this invention. It is a schematic diagram which shows the board | substrate for wiring. It is the schematic diagram which expanded and showed partially the electric structure of the display medium. It is a schematic diagram which shows the display medium which concerns on this Embodiment. It is a schematic diagram which shows the manufacturing process of the display medium which concerns on this Embodiment, (A) is a schematic diagram which shows a display medium, (B) is A of the display medium shown to FIG.5 and FIG.6 (A). -C 'is a schematic diagram showing a cross-sectional view and a connecting substrate portion connected thereto, (C) is a cross-sectional view of the display medium shown in FIG. 5 and FIG. It is a schematic diagram which shows the board | substrate part for connection. It is a schematic diagram which shows the manufacturing process of the display medium which concerns on this Embodiment. It is a schematic diagram which shows the manufacturing process of the display medium which concerns on this Embodiment. It is a schematic diagram which shows the manufacturing process of the display medium which concerns on this Embodiment. It is a schematic diagram which shows the manufacturing process of the display medium which concerns on this Embodiment. It is a schematic diagram which shows the display medium which concerns on this Embodiment. It is a schematic diagram which shows the display apparatus in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Display medium 11 Display apparatus 12 Display part 13 Writing apparatus 14 Connection board | substrate part 16 Display element 20 Column electrode 22 Row electrode 30 Each liquid crystal layer 32 Terminal 34 for wiring 34 Substrate 36 for connection 37 Terminal 37 for wiring For connection 39 substrate

Claims (2)

A display board;
A rear substrate disposed facing the display substrate with a gap;
A plurality of linear row electrodes provided on the display substrate side and arranged in a predetermined direction;
A plurality of linear column electrodes arranged on the back substrate side and arranged in a crossing direction intersecting the arrangement direction of the row electrodes;
A liquid crystal layer provided between the display substrate and the back substrate and having optical characteristics that change in accordance with an electric field formed between the row electrode and the column electrode;
A display unit including a plurality of display elements, and each of the liquid crystal layers included in the plurality of display elements has a different optical characteristic;
A unit comprising a plurality of column electrodes disposed at one end in the longitudinal direction of the plurality of column electrodes of each of the display elements and applying a voltage to the same pixel column of an image displayed on the display unit. A first connection portion having a plurality of first terminal portions provided corresponding to each unit divided in advance,
A unit comprising a plurality of row electrodes disposed at one end in the longitudinal direction of the plurality of row electrodes of each of the display elements and applying a voltage to the same pixel row of an image displayed on the display unit. A second connection portion having a plurality of second terminal portions provided corresponding to each unit divided in advance,
A display medium comprising:   A display comprising: the display medium according to claim 1; and a voltage application unit that is connected to the first terminal unit and the second terminal unit and applies a voltage between the row electrode and the column electrode. apparatus.