JP4735031B2

JP4735031B2 - Display device

Info

Publication number: JP4735031B2
Application number: JP2005139637A
Authority: JP
Inventors: 直知宮本
Original assignee: Casio Computer Co Ltd
Current assignee: Casio Computer Co Ltd
Priority date: 2005-05-12
Filing date: 2005-05-12
Publication date: 2011-07-27
Anticipated expiration: 2025-05-12
Also published as: JP2006317667A

Description

この発明は、１画素を構成する空間内においてシリコーンゴムなどの弾性体を移動させて表示を行なう表示装置に関する。 The present invention relates to a display device that performs display by moving an elastic body such as silicone rubber in a space constituting one pixel.

１画素を構成する空間内において物体を移動させて表示を行なう従来の表示装置には、１画素を構成する容器内に着色液体（誘電体）および気泡を封入し、容器の一方側の外面に互いに対向して設けられた一対の第１の電極に電圧が印加されると、静電力により、着色液体を容器内の一方側に移動させるとともに、気泡を容器内の他方側に移動させ、容器の他方側の外面に互いに対向して設けられた一対の第２の電極に電圧が印加されると、静電力により、着色液体を容器内の他方側に移動させるとともに、気泡を容器内の一方側に移動させ、容器の一方側のみを視認可能な画素とすることにより、表示を行なうようにしたものがある（例えば、特許文献１参照）。 In a conventional display device that performs display by moving an object in a space constituting one pixel, a colored liquid (dielectric material) and bubbles are sealed in a container constituting one pixel, and the outer surface on one side of the container is enclosed. When a voltage is applied to the pair of first electrodes provided opposite to each other, the colored liquid is moved to one side in the container by the electrostatic force, and the bubbles are moved to the other side in the container. When a voltage is applied to a pair of second electrodes provided opposite to each other on the outer surface of the liquid crystal, the colored liquid is moved to the other side in the container by electrostatic force, and the bubbles are moved to one side in the container. There is a display that is moved to the side and made to be a visible pixel only on one side of the container (for example, see Patent Document 1).

特開平８−２５４９６２号公報Japanese Patent Laid-Open No. 8-254962

しかしながら、上記従来の表示装置では、容器の一方側の表面側とは反対側を白色で不透明とし、容器内の一方側に気泡があるとき、白色表示とし、容器内の一方側に着色液体があるとき、着色液体の色自体による色表示としているので、１画素に対応する着色液体の量を容器内の片側のみを常に必要十分に満たす量としなければならず、製造が困難であるという問題がある。 However, in the above conventional display device, the side opposite to the surface side on one side of the container is white and opaque, and when there is a bubble on one side in the container, white display is given, and the colored liquid is on one side in the container In some cases, since the color display is based on the color of the colored liquid itself, the amount of the colored liquid corresponding to one pixel must always be sufficient to satisfy only one side of the container, which is difficult to manufacture. There is.

そこで、この発明は、１画素を構成する空間内において表示を行なうために移動させる物体を、着色液体ではなく、シリコーンゴムなどの弾性体とすることにより、比較的容易に製造することができる表示装置を提供することを目的とする。 In view of this, in the present invention, a display that can be relatively easily manufactured by using an elastic body such as silicone rubber instead of a colored liquid as an object to be moved in a space constituting one pixel. An object is to provide an apparatus.

この発明は、上記目的を達成するため、表示装置において、表面側基板と裏面側基板とその間に設けられた側壁とによって囲まれた１画素を構成する空間と、前記空間内に表裏方向に移動可能に設けられた移動電極と、前記移動電極の前記表面側基板と対向する側の面に設けられた弾性変形可能な弾性層と、前記移動電極を前記弾性層と共に表裏方向に移動させる移動電極移動手段と、前記表面側基板の内面に設けられ、前記弾性層が押し付けられていないとき、光を散乱反射させ、前記弾性層が押し付けられているとき、光を透過させる作用面と、を備えていることを特徴とするものである。 In order to achieve the above object, according to the present invention, in a display device, a space that constitutes one pixel surrounded by a front surface side substrate, a back surface side substrate, and a side wall provided therebetween, and moves in the front and back direction in the space. A movable electrode that can be provided, an elastic layer that is elastically deformable provided on a surface of the moving electrode that faces the surface-side substrate, and a movable electrode that moves the movable electrode in the front and back direction together with the elastic layer A moving means provided on the inner surface of the surface-side substrate, and having a working surface that scatters and reflects light when the elastic layer is not pressed and transmits light when the elastic layer is pressed. It is characterized by that.

この発明によれば、表面側基板の作用面に弾性層が押し付けられていないとき、作用面で光を散乱反射させることにより、白色表示を行ない、作用面に弾性層が押し付けられているとき、白色表示以外の色表示を行なうので、１画素を構成する空間内に弾性層を移動電極と共に表裏方向に移動可能に設ければよく、表示を行なうための移動物体として着色液体を用いる場合と比較して、比較的容易に製造することができる。 According to the present invention, when the elastic layer is not pressed against the working surface of the surface side substrate, white light is displayed by scattering and reflecting light on the working surface, and when the elastic layer is pressed against the working surface, Since color display other than white display is performed, it is only necessary to provide an elastic layer in the space constituting one pixel so as to be movable in the front and back direction together with the moving electrode. Compared with the case where a colored liquid is used as a moving object for display. Thus, it can be manufactured relatively easily.

（第１実施形態）
図１はこの発明の第１実施形態としての表示装置の１画素部分の白色表示状態を示す断面図である。この表示装置は、ガラスや樹脂などの無色透明な材料からなる平面方形状の表面側透明板（基板）１および裏面側（透明）板（基板）２を備えている。表面側透明板１の内面には、サンドブラスト加工やマイクロブラスト加工などにより、細かな凸凹面（作用面）３が形成されている。すなわち、表面側透明板１はすりガラス状となっている。なお、表面側透明板１の側から視認する反射型表示装置の場合、裏面側（透明）板２は必ずしも無色透明である必要はない。 (First embodiment)
FIG. 1 is a sectional view showing a white display state of one pixel portion of a display device as a first embodiment of the present invention. This display device is provided with a flat rectangular front surface side transparent plate (substrate) 1 and back surface side (transparent) plate (substrate) 2 made of a colorless and transparent material such as glass or resin. On the inner surface of the surface side transparent plate 1, a fine uneven surface (working surface) 3 is formed by sandblasting, microblasting or the like. That is, the surface side transparent plate 1 has a ground glass shape. In the case of a reflective display device that is viewed from the front side transparent plate 1 side, the back side (transparent) plate 2 does not necessarily need to be colorless and transparent.

表面側透明板１の外面にはＩＴＯなどの透明導電材料からなる表面側電極板４および酸化シリコンなどからなる絶縁膜（保護膜）５が設けられている。裏面側（透明）板２の内面には銅、アルミニウムなどからなる裏面側電極板６および酸化シリコンなどからなる絶縁膜（保護膜）７が設けられている。 A front side electrode plate 4 made of a transparent conductive material such as ITO and an insulating film (protective film) 5 made of silicon oxide or the like are provided on the outer surface of the front side transparent plate 1. On the inner surface of the back side (transparent) plate 2, a back side electrode plate 6 made of copper, aluminum or the like and an insulating film (protective film) 7 made of silicon oxide or the like are provided.

両基板１、２は互いに対向して配置され、その間の周囲には側壁８が設けられている。そして、表面側透明板１の凸凹面（作用面）３、裏面側（透明）板２上の絶縁膜７および側壁８によって囲まれた空間により、１画素を構成する空間９が形成されている。空間９内には銅、アルミニウムなどからなる移動電極１０が表裏方向に移動可能に設けられている。移動電極１０の表面側透明板１と対向する側の面には例えばシリコーンゴムなどの弾性体からなる弾性層１１が設けられている。ここでは、弾性層１１は黒色であるとして説明する。 Both the substrates 1 and 2 are disposed to face each other, and a side wall 8 is provided around the substrate. A space 9 constituting one pixel is formed by the space surrounded by the uneven surface (working surface) 3 of the front surface side transparent plate 1, the insulating film 7 on the back surface (transparent) plate 2, and the side wall 8. . A moving electrode 10 made of copper, aluminum or the like is provided in the space 9 so as to be movable in the front and back direction. An elastic layer 11 made of an elastic material such as silicone rubber is provided on the surface of the moving electrode 10 facing the transparent plate 1 on the front side. Here, the elastic layer 11 is described as being black.

移動電極１０および弾性層１１の平面サイズは空間９の平面サイズよりもやや小さくなっており、移動電極１０および弾性層１１の周囲面と側壁８の内面との間には隙間１２が設けられている。隙間１２は、移動電極１０および弾性層１１の表裏方向への移動をスムーズにするとともに、空間９内に封入された空気の移動を許容するためのものである。 The plane size of the moving electrode 10 and the elastic layer 11 is slightly smaller than the plane size of the space 9, and a gap 12 is provided between the peripheral surface of the moving electrode 10 and the elastic layer 11 and the inner surface of the side wall 8. Yes. The gap 12 is for smooth movement of the moving electrode 10 and the elastic layer 11 in the front and back directions and for allowing movement of air enclosed in the space 9.

そして、後で説明するように、図１に示す状態では白色表示となるが、裏面側電極板６と移動電極１０間に電圧が印加された状態にあり、裏面側電極板６と移動電極１０とには印加された電圧に対応する正負の電荷がそれぞれ誘導され、両極板の間に発生するクーロン力による引力により、移動電極１０が弾性層１１と共に裏面側に向かって移動し、移動電極１０の下面が裏面側（透明）板２上の絶縁膜７の上面に当接された状態となっている。 As will be described later, in the state shown in FIG. 1, white display is performed, but a voltage is applied between the back-side electrode plate 6 and the moving electrode 10, and the back-side electrode plate 6 and the moving electrode 10 are present. In addition, positive and negative charges corresponding to the applied voltage are respectively induced, and the moving electrode 10 moves toward the back side together with the elastic layer 11 due to the attractive force due to the Coulomb force generated between the bipolar plates. Is in contact with the upper surface of the insulating film 7 on the back surface (transparent) plate 2.

次に、この表示装置の表示切り替え動作について説明する。図１に示す状態において、裏面側電極板６と移動電極１０間への電圧の印加を停止し、表面側電極板４と移動電極１０間に電圧が印加されると、表面側電極板４と移動電極１０とには印加された電圧に対応する正負の電荷がそれぞれ誘導され、両極板の間に発生するクーロン力による引力により、移動電極１０が弾性層１１と共に表面側に向かって移動し、図２に示すように、弾性層１１の表面側が表面側透明板１の凸凹面（作用面）３に適宜に弾性変形して押し付けられている状態となる。 Next, the display switching operation of this display device will be described. In the state shown in FIG. 1, when the application of voltage between the back surface side electrode plate 6 and the moving electrode 10 is stopped and a voltage is applied between the front surface side electrode plate 4 and the moving electrode 10, Positive and negative charges corresponding to the applied voltage are respectively induced in the moving electrode 10, and the moving electrode 10 moves toward the surface side together with the elastic layer 11 by the attractive force due to the Coulomb force generated between the bipolar plates. As shown in FIG. 4, the surface side of the elastic layer 11 is appropriately elastically deformed and pressed against the uneven surface (working surface) 3 of the surface side transparent plate 1.

逆に、図２に示す状態において、表面側電極板４および移動電極１０への電圧の印加を停止し、裏面側電極板６と移動電極１０間に電圧が印加されると、裏面側電極板６と移動電極１０とには印加された電圧に対応する正負の電荷がそれぞれ誘導され、両極板の間に発生するクーロン力による引力により、移動電極１０が弾性層１１と共に裏面側に向かって移動し、図１に示すように、移動電極１０の下面が裏面側（透明）板２上の絶縁膜７の上面に当接する状態に戻る。 On the contrary, in the state shown in FIG. 2, when the voltage application to the front surface side electrode plate 4 and the moving electrode 10 is stopped and a voltage is applied between the back surface side electrode plate 6 and the moving electrode 10, the back surface side electrode plate 6 and the moving electrode 10 are respectively induced with positive and negative charges corresponding to the applied voltage, and the moving electrode 10 moves toward the back side together with the elastic layer 11 by the attractive force due to the Coulomb force generated between the bipolar plates. As shown in FIG. 1, the lower surface of the moving electrode 10 returns to a state where it abuts on the upper surface of the insulating film 7 on the back surface (transparent) plate 2.

次に、図１および図２にそれぞれ示す状態における表示状態について説明すると、図１に示す状態では、表面側透明板１の表面側から入射された外光が絶縁膜５、表面側電極板４および表面側透明板１を透過して表面側透明板１と空気との界面（凸凹面（作用面）３）で散乱反射され、この散乱反射光が上記とは逆の光路を経て表面側透明板１の表面側に出射され、白色表示となる。 Next, the display state in the state shown in FIGS. 1 and 2 will be described. In the state shown in FIG. 1, external light incident from the surface side of the surface-side transparent plate 1 is the insulating film 5 and the surface-side electrode plate 4. In addition, the light passes through the surface-side transparent plate 1 and is scattered and reflected at the interface between the surface-side transparent plate 1 and air (uneven surface (working surface) 3). The light is emitted to the surface side of the plate 1 and is displayed in white.

一方、図２に示す状態では、表面側透明板１の凸凹面（作用面）３に弾性層１１の表面側が押し付けられているため、表面側透明板１と空気との界面での散乱反射は起こらず、表面側透明板１の表面側から入射された外光が絶縁膜５、表面側電極板４および表面側透明板１を透過して黒色の弾性層１１で吸収され、黒色表示となる。 On the other hand, in the state shown in FIG. 2, since the surface side of the elastic layer 11 is pressed against the uneven surface (working surface) 3 of the surface side transparent plate 1, the scattering reflection at the interface between the surface side transparent plate 1 and air is The external light incident from the front surface side of the front transparent plate 1 without passing through the insulating film 5, the front electrode plate 4 and the front transparent plate 1 is absorbed by the black elastic layer 11 to produce a black display. .

以上のように、この表示装置では、表面側透明板１の凸凹面（作用面）３に弾性層１１が押し付けられていないとき、凸凹面（作用面）３で光を散乱反射させることにより、白色表示を行ない、凸凹面（作用面）３に弾性層１１が押し付けられているとき、散乱は起こらず、黒色表示を行なうので、１画素を構成する空間９内に弾性層１１を移動電極１０と共に表裏方向に移動可能に設ければよく、表示を行なうための移動物体として着色液体を用いて、空間９内に着色液体を適切な量注入しなければならない特許文献１の場合と比較して、比較的容易に製造することができる。 As described above, in this display device, when the elastic layer 11 is not pressed against the uneven surface (working surface) 3 of the surface-side transparent plate 1, the light is scattered and reflected by the uneven surface (working surface) 3. When white display is performed and the elastic layer 11 is pressed against the uneven surface (working surface) 3, no scattering occurs, and black display is performed. Therefore, the elastic layer 11 is placed in the space 9 constituting one pixel, and the moving electrode 10 It is only necessary to be provided so as to be movable in the front and back direction, and compared with the case of Patent Document 1 in which an appropriate amount of colored liquid must be injected into the space 9 using a colored liquid as a moving object for display. Can be manufactured relatively easily.

（第２実施形態）
図３はこの発明の第２実施形態としての表示装置の１画素部分の白色表示状態を示す断面図である。この表示装置において、図１に示す表示装置と異なる点は、裏面側（透明）板２の内面に裏面側電極板６および絶縁膜７を設けずに、その代わりに、裏面側（透明）板２と移動電極１０との間に複数の圧縮コイルスプリング（弾性部材）１３を設けた点である。 (Second Embodiment)
FIG. 3 is a sectional view showing a white display state of one pixel portion of a display device as a second embodiment of the present invention. This display device is different from the display device shown in FIG. 1 in that the back side electrode plate 6 and the insulating film 7 are not provided on the inner surface of the back side (transparent) plate 2, and instead, the back side (transparent) plate. 2 and the movable electrode 10 are provided with a plurality of compression coil springs (elastic members) 13.

そして、図３に示す白色表示状態では、表面側電極板４と移動電極１０間の電圧が０の状態であり、圧縮コイルスプリング１３は、移動電極１０を含む弾性層１１が表面側透明板１の凸凹面（作用面）３から裏面側にある程度離れた位置で平衡となっている。 In the white display state shown in FIG. 3, the voltage between the surface-side electrode plate 4 and the moving electrode 10 is 0, and the compression coil spring 13 includes the elastic layer 11 including the moving electrode 10 on the surface-side transparent plate 1. Is balanced at a position away from the uneven surface (working surface) 3 to the back surface side to some extent.

次に、この表示装置の表示切り替え動作について説明する。図３に示す状態において、表面側電極板４と移動電極１０間に電圧が印加されると、表面側電極板４と移動電極１０とには印加された電圧に対応する正負の電荷がそれぞれ誘導され、両極板の間にクーロン力による引力が発生する。すると、移動電極１０は弾性層１１と共に圧縮コイルスプリング１３の力に抗して表面側に向かって移動し、図４に示すように、弾性層１１の表面側が表面側透明板１の凸凹面（作用面）３に適宜に弾性変形して押し付けられている状態となる。この状態では、図２に示す場合と同様に、黒色表示となる。 Next, the display switching operation of this display device will be described. In the state shown in FIG. 3, when a voltage is applied between the surface side electrode plate 4 and the moving electrode 10, positive and negative charges corresponding to the applied voltage are induced in the surface side electrode plate 4 and the moving electrode 10, respectively. As a result, an attractive force due to the Coulomb force is generated between the bipolar plates. Then, the moving electrode 10 moves toward the surface side against the force of the compression coil spring 13 together with the elastic layer 11, and as shown in FIG. 4, the surface side of the elastic layer 11 is an uneven surface of the surface side transparent plate 1 ( The working surface 3 is appropriately elastically deformed and pressed. In this state, the display is black as in the case shown in FIG.

一方、図４に示す状態において、表面側電極板４と移動電極１０間へ印加する電圧を０とすると、表面側電極板４と移動電極１０との間に発生していたクーロン力による引力が消失する。すると、移動電極１０は弾性層１１と共に圧縮コイルスプリング１３の力により裏面側に向かって移動し、図３に示すように、弾性層１１が表面側透明板１の凸凹面（作用面）３から裏面側にある程度離れた位置で平衡状態となる。この状態では、図１に示す場合と同様に、白色表示となる。 On the other hand, in the state shown in FIG. 4, if the voltage applied between the surface-side electrode plate 4 and the moving electrode 10 is 0, the attractive force due to the Coulomb force generated between the surface-side electrode plate 4 and the moving electrode 10 is Disappear. Then, the movable electrode 10 moves toward the back surface side by the force of the compression coil spring 13 together with the elastic layer 11, and the elastic layer 11 moves from the uneven surface (working surface) 3 of the front surface side transparent plate 1 as shown in FIG. 3. Equilibrium is reached at a position some distance away from the back side. In this state, the display is white as in the case shown in FIG.

（第３実施形態）
図５はこの発明の第３実施形態としての表示装置の１画素部分の黒色表示状態を示す断面図である。この表示装置において、図２に示す表示装置と異なる点は、表面側透明板１の外面に表面側電極板４および絶縁膜５を設けずに、その代わりに、裏面側の絶縁膜７と移動電極１０との間に複数の圧縮コイルスプリング（弾性部材）１３を設けた点である。 (Third embodiment)
FIG. 5 is a sectional view showing a black display state of one pixel portion of a display device as a third embodiment of the present invention. This display device differs from the display device shown in FIG. 2 in that the front-side electrode plate 4 and the insulating film 5 are not provided on the outer surface of the front-side transparent plate 1, but instead move with the insulating film 7 on the back side. This is that a plurality of compression coil springs (elastic members) 13 are provided between the electrodes 10.

そして、図５に示す黒色表示状態では、裏面側電極板６と移動電極１０間の電圧が０の状態であり、移動電極１０が弾性層１１と共に圧縮コイルスプリング１３の力により表面側に向かって付勢されていることにより、弾性層１１の表面側が表面側透明板１の凸凹面（作用面）３に適宜に弾性変形して押し付けられている。 In the black display state shown in FIG. 5, the voltage between the back surface side electrode plate 6 and the moving electrode 10 is 0, and the moving electrode 10 moves toward the front surface side by the force of the compression coil spring 13 together with the elastic layer 11. By being biased, the surface side of the elastic layer 11 is appropriately elastically deformed and pressed against the uneven surface (working surface) 3 of the surface side transparent plate 1.

次に、この表示装置の表示切り替え動作について説明する。図５に示す状態において、裏面側電極板６と移動電極１０間に電圧が印加されると、裏面側電極板６と移動電極１０とには印加した電圧に対応する正負の電荷がそれぞれ誘導され、両極板の間にクーロン力による引力が発生する。すると、移動電極１０は弾性層１１と共に圧縮コイルスプリング１３の力に抗して裏面側に向かって移動し、図６に示すように、弾性層１１が表面側透明板１の凸凹面（作用面）３から裏面側にある程度離れた位置で平衡状態となる。この状態では、図１に示す場合と同様に、白色表示となる。 Next, the display switching operation of this display device will be described. In the state shown in FIG. 5, when a voltage is applied between the back side electrode plate 6 and the moving electrode 10, positive and negative charges corresponding to the applied voltage are induced in the back side electrode plate 6 and the moving electrode 10, respectively. And, attractive force due to Coulomb force is generated between the bipolar plates. Then, the moving electrode 10 moves toward the back side against the force of the compression coil spring 13 together with the elastic layer 11, and the elastic layer 11 moves to the uneven surface (working surface) of the front side transparent plate 1 as shown in FIG. ) Equilibrium is reached at a position away from 3 to the back side to some extent. In this state, the display is white as in the case shown in FIG.

一方、図６に示す状態において、裏面側電極板６と移動電極１０間へ印加する電圧を０とすると、裏面側電極板６と移動電極１０との間に発生していたクーロン力による引力が消失する。すると、移動電極１０は弾性層１１と共に圧縮コイルスプリング１３の力により表面側に向かって移動し、図５に示すように、弾性層１１の表面側が表面側透明板１の凸凹面（作用面）３に適宜に弾性変形して押し付けられている状態となる。この状態では、図２に示す場合と同様に、黒色表示となる。 On the other hand, in the state shown in FIG. 6, if the voltage applied between the back surface side electrode plate 6 and the moving electrode 10 is 0, the attractive force due to the Coulomb force generated between the back surface side electrode plate 6 and the moving electrode 10 is Disappear. Then, the movable electrode 10 moves toward the surface side by the force of the compression coil spring 13 together with the elastic layer 11, and as shown in FIG. 5, the surface side of the elastic layer 11 is an uneven surface (working surface) of the surface side transparent plate 1. 3 is appropriately elastically deformed and pressed. In this state, the display is black as in the case shown in FIG.

ところで、図２に示す黒色表示状態において、表面側電極板４および移動電極１０への電圧の印加を停止し、表面側電極板４および移動電極１０が電気的にはどことも接続されないオープン状態に適切にできれば、表面側電極板４と移動電極１０とに誘導されていた正負の電荷がそれぞれ保持され、両極板の間に発生していたクーロン力による引力は消失しないが、上記オープン状態への切り替えの仕方や電荷のリーク等により、クーロン力による引力が消失しやすいので、弾性層１１の表面側を表面側基板１の凸凹面（作用面）３に適宜に弾性変形させて押し付けられた状態を維持することができず、弾性層１１を含む移動電極１０が裏面側に向かって勝手に移動し、黒色表示状態がくずれてしまう現象が起こる。 By the way, in the black display state shown in FIG. 2, the application of the voltage to the surface side electrode plate 4 and the moving electrode 10 is stopped, and the surface side electrode plate 4 and the moving electrode 10 are electrically connected to nowhere. If appropriate, the positive and negative charges induced in the surface side electrode plate 4 and the movable electrode 10 are retained, and the attractive force due to the Coulomb force generated between the bipolar plates does not disappear, but the switching to the open state is not performed. The attractive force due to the Coulomb force tends to disappear due to the way and charge leakage, etc., so that the surface side of the elastic layer 11 is appropriately elastically deformed and pressed against the uneven surface (working surface) 3 of the surface side substrate 1 to maintain the pressed state. In other words, the moving electrode 10 including the elastic layer 11 moves toward the back side without permission, and the black display state is lost.

また、図４に示す黒色表示状態において、表面側電極板４と移動電極１０間へ印加する電圧を０とするのではなく、表面側電極板４および移動電極１０への電圧の印加を停止し、表面側電極板４および移動電極１０が電気的にはどことも接続されないオープン状態に適切にできれば、表面側電極板４と移動電極１０とに誘導されていた正負の電荷がそれぞれ保持され、両極板の間に発生していたクーロン力による引力は消失しないが、上記オープン状態への切り替えの仕方や電荷のリーク等により、クーロン力による引力が消失しやすいので、移動電極１０が弾性層１１と共に圧縮コイルスプリング１３の力により裏面側に向かって移動し、図３に示す白色表示状態となり、黒色表示状態がくずれてしまう現象が起こる。 In the black display state shown in FIG. 4, the voltage applied between the surface side electrode plate 4 and the moving electrode 10 is not set to 0, but the application of the voltage to the surface side electrode plate 4 and the moving electrode 10 is stopped. If the surface side electrode plate 4 and the moving electrode 10 can be appropriately connected to an open state where they are not electrically connected to each other, the positive and negative charges induced in the surface side electrode plate 4 and the moving electrode 10 are held respectively. Although the attractive force due to the Coulomb force generated between the plates does not disappear, the attractive force due to the Coulomb force is likely to disappear due to the way of switching to the open state or the leakage of electric charge. Due to the force of the spring 13, it moves toward the back side, resulting in a white display state shown in FIG. 3 and a phenomenon in which the black display state is broken.

また、図６に示す白色表示状態において、裏面側電極板６と移動電極１０間へ印加する電圧を０とするのではなく、裏面側電極板６および移動電極１０への電圧の印加を停止し、裏面側電極板６および移動電極１０が電気的にはどことも接続されないオープン状態に適切にできれば、裏面側電極板６と移動電極１０とに誘導されていた正負の電荷がそれぞれ保持され、両極板の間に発生していたクーロン力による引力は消失しないが、上記オープン状態への切り替えの仕方や電荷のリーク等により、クーロン力による引力が消失しやすいので、移動電極１０が弾性層１１と共に圧縮コイルスプリング１３の力により表面側に向かって移動し、図５に示す黒色表示状態となり、白色表示状態がくずれてしまう現象が起こる。
そこで、次に、所定の電圧の印加を停止しても、所定の表示状態を確実に維持することができる表示装置について説明する。 Further, in the white display state shown in FIG. 6, the voltage applied between the back side electrode plate 6 and the moving electrode 10 is not set to 0, but the application of the voltage to the back side electrode plate 6 and the moving electrode 10 is stopped. If the back-side electrode plate 6 and the moving electrode 10 are appropriately connected in an open state where they are not electrically connected to any other place, the positive and negative charges induced in the back-side electrode plate 6 and the moving electrode 10 are held respectively. Although the attractive force due to the Coulomb force generated between the plates does not disappear, the attractive force due to the Coulomb force is likely to disappear due to the way of switching to the open state or the leakage of electric charge. Due to the force of the spring 13, it moves toward the surface side, resulting in a black display state as shown in FIG.
Therefore, a display device that can reliably maintain a predetermined display state even when application of a predetermined voltage is stopped will be described.

（第４実施形態）
図７はこの発明の第４実施形態としての表示装置の１画素部分の白色表示状態を示す断面図である。この表示装置において、図１に示す表示装置と異なる点は、移動電極１０の裏面の相対向する２辺部に摺動部材支持部材１４を設け、摺動部材支持部材１４の外面に設けられた断面が半円形状の凹部内に円柱形状の摺動部材１５を取り付け、摺動部材１５と側壁８の内面との間に適度の摩擦を持たせた点である。 (Fourth embodiment)
FIG. 7 is a cross-sectional view showing a white display state of one pixel portion of a display device as a fourth embodiment of the present invention. This display device is different from the display device shown in FIG. 1 in that a sliding member support member 14 is provided on two opposite sides of the back surface of the moving electrode 10 and provided on the outer surface of the sliding member support member 14. A cylindrical sliding member 15 is mounted in a recess having a semicircular cross section, and moderate friction is provided between the sliding member 15 and the inner surface of the side wall 8.

そして、この表示装置では、図７に示すように、裏面側電極板６と移動電極１０との間に発生させるクーロン力による引力（摺動部材１５と側壁８の内面との間の摩擦力に打ち勝つ程度の引力）により、弾性層１１、摺動部材支持部材１４および摺動部材１５を含む移動電極１０が裏面側に向かって移動し、摺動部材支持部材１４の下面が裏面側（透明）板２上の絶縁膜７の上面に当接して、白色表示に切り換えた後には、裏面側電極板６と移動電極１０間への電圧の印加を停止しても、摺動部材１５と側壁８の内面との間の摩擦力により、摺動部材支持部材１４の下面が裏面側（透明）板２上の絶縁膜７の上面に当接した状態を確実に維持することができる。 In this display device, as shown in FIG. 7, the attractive force (the frictional force between the sliding member 15 and the inner surface of the side wall 8 is generated by the Coulomb force generated between the back electrode plate 6 and the moving electrode 10. The moving electrode 10 including the elastic layer 11, the sliding member support member 14, and the sliding member 15 moves toward the back surface side, and the lower surface of the sliding member support member 14 is on the back surface side (transparent). After the contact with the upper surface of the insulating film 7 on the plate 2 and switching to white display, the sliding member 15 and the side wall 8 can be applied even if the application of voltage between the back electrode plate 6 and the moving electrode 10 is stopped. The state in which the lower surface of the sliding member support member 14 is in contact with the upper surface of the insulating film 7 on the back surface (transparent) plate 2 can be reliably maintained by the frictional force between the inner surface and the inner surface.

一方、図８に示すように、表面側電極板４と移動電極１０との間に発生させるクーロン力による引力（摺動部材１５と側壁８の内面との間の摩擦力に打ち勝つ程度の引力）により、弾性層１１、摺動部材支持部材１４および摺動部材１５を含む移動電極１０が表面側に向かって移動し、弾性層１１の表面側が表面側透明板１の凸凹面（作用面）３に適宜に弾性変形して押し付けられて、黒色表示に切り換えた後には、表面側電極板４と移動電極１０間への電圧の印加を停止しても、摺動部材１５と側壁８の内面との間の摩擦力により、弾性層１１の表面側が表面側透明板１の凸凹面（作用面）３に適宜に弾性変形して押し付けられた状態を確実に維持することができる。
したがって、この表示装置では、表示内容を変えない限りは電力を加える必要はなく、非常に低消費電力化することができる。 On the other hand, as shown in FIG. 8, the attractive force due to the Coulomb force generated between the surface-side electrode plate 4 and the moving electrode 10 (attractive force enough to overcome the frictional force between the sliding member 15 and the inner surface of the side wall 8). Accordingly, the movable electrode 10 including the elastic layer 11, the sliding member support member 14 and the sliding member 15 moves toward the surface side, and the surface side of the elastic layer 11 is the uneven surface (working surface) 3 of the surface side transparent plate 1. After the elastic display is appropriately deformed and pressed to switch to black display, the sliding member 15 and the inner surface of the side wall 8 can be applied even if the application of voltage between the surface side electrode plate 4 and the moving electrode 10 is stopped. Thus, the state in which the surface side of the elastic layer 11 is appropriately elastically deformed and pressed against the uneven surface (working surface) 3 of the surface side transparent plate 1 can be reliably maintained.
Therefore, in this display device, it is not necessary to apply power as long as the display contents are not changed, and the power consumption can be greatly reduced.

（第５実施形態）
図９はこの発明の第５実施形態としての表示装置の１画素部分の白色表示状態を示す断面図である。この表示装置において、図１に示す表示装置と異なる点は、側壁８の表面側の相対向する２箇所および裏面側の相対向する２箇所に表面側永久磁石１６および裏面側永久磁石１７を設け、移動電極１０の下面の相対向する周囲部に鉄などからなる磁性部材１８を設けた点である。 (Fifth embodiment)
FIG. 9 is a cross-sectional view showing a white display state of one pixel portion of a display device as a fifth embodiment of the present invention. This display device is different from the display device shown in FIG. 1 in that a front surface side permanent magnet 16 and a back surface side permanent magnet 17 are provided at two opposite positions on the front surface side of the side wall 8 and at two opposite positions on the rear surface side. In other words, magnetic members 18 made of iron or the like are provided on the opposing peripheral portions of the lower surface of the moving electrode 10.

そして、この表示装置では、図９に示すように、裏面側電極板６と移動電極１０との間に発生させるクーロン力による引力（表面側永久磁石１６と磁性部材１８との間に発生する磁力による引力に打ち勝つ程度の引力）により、弾性層１１および磁性部材１８を含む移動電極１０が裏面側に向かって移動し、磁性部材１８の下面が裏面側（透明）板２上の絶縁膜７の上面に当接して、白色表示に切り換えた後には、裏面側電極板６と移動電極１０間への電圧の印加を停止しても、互いに対向する位置に位置する裏面側永久磁石１７と磁性部材１８との間に発生する磁力による引力により、磁性部材１８の下面が裏面側（透明）板２上の絶縁膜７の上面に当接した状態を確実に維持することができる。 In this display device, as shown in FIG. 9, an attractive force (a magnetic force generated between the front-side permanent magnet 16 and the magnetic member 18) generated by the Coulomb force generated between the back-side electrode plate 6 and the moving electrode 10. The moving electrode 10 including the elastic layer 11 and the magnetic member 18 is moved toward the back surface side, and the lower surface of the magnetic member 18 is formed on the insulating film 7 on the back surface (transparent) plate 2. After the contact with the upper surface and switching to the white display, even if the application of voltage between the rear electrode plate 6 and the movable electrode 10 is stopped, the rear permanent magnet 17 and the magnetic member located at positions facing each other. The state in which the lower surface of the magnetic member 18 is in contact with the upper surface of the insulating film 7 on the back surface (transparent) plate 2 can be reliably maintained by the attractive force generated between the magnetic member 18 and the magnetic layer 18.

一方、図１０に示すように、表面側電極板４と移動電極１０との間に発生させるクーロン力による引力（裏面側永久磁石１７と磁性部材１８との間に発生する磁力による引力に打ち勝つ程度の引力）により、弾性層１１および磁性部材１８を含む移動電極１０が表面側に向かって移動し、弾性層１１が表面側透明板１の凸凹面（作用面）３に適宜に弾性変形して押し付けられて、黒色表示に切り換えた後には、表面側電極板４と移動電極１０間への電圧の印加を停止しても、互いに対向する位置に位置する表面側永久磁石１６と磁性部材１８との間に発生する磁力による引力により、弾性層１１の表面側が表面側透明板１の凸凹面（作用面）３に適宜に弾性変形して押し付けられた状態を確実に維持することができる。 On the other hand, as shown in FIG. 10, the attractive force due to the Coulomb force generated between the front surface side electrode plate 4 and the moving electrode 10 (the degree of overcoming the attractive force due to the magnetic force generated between the back surface side permanent magnet 17 and the magnetic member 18 is overcome. ), The movable electrode 10 including the elastic layer 11 and the magnetic member 18 moves toward the surface side, and the elastic layer 11 is appropriately elastically deformed to the uneven surface (working surface) 3 of the surface side transparent plate 1. After being pressed and switched to black display, even if the application of voltage between the surface side electrode plate 4 and the moving electrode 10 is stopped, the surface side permanent magnet 16 and the magnetic member 18 located at positions facing each other The state in which the surface side of the elastic layer 11 is appropriately elastically deformed and pressed against the uneven surface (working surface) 3 of the surface-side transparent plate 1 can be reliably maintained by the attractive force due to the magnetic force generated during the time.

したがって、この表示装置でも、表示内容を変えない限りは電力を加える必要はなく、非常に低消費電力化することができる。なお、側壁８の表面側の相対向する２箇所および裏面側の相対向する２箇所に鉄などからなる表面側磁性部材および裏面側磁性部材を設け、移動電極１０の下面の相対向する周囲部に永久磁石を設けるようにしてもよい。
また、上記実施形態では永久磁石を用いる構成で説明したが、磁力を発生させるものであれば、電磁石等のものであってもよい。 Therefore, even in this display device, it is not necessary to apply power as long as the display contents are not changed, and the power consumption can be greatly reduced. In addition, a front surface side magnetic member and a back surface side magnetic member made of iron or the like are provided at two opposite positions on the front surface side of the side wall 8 and two opposite positions on the rear surface side, and opposite peripheral portions on the lower surface of the moving electrode 10. A permanent magnet may be provided.
Moreover, although the said embodiment demonstrated the structure which uses a permanent magnet, as long as a magnetic force is generated, things, such as an electromagnet, may be sufficient.

（第６実施形態）
図１１はこの発明の第６実施形態としての表示装置の１画素部分の白色表示状態を示す断面図である。この表示装置において、図１に示す表示装置と異なる点は、側壁８の内面の表面側の相対向する２箇所および裏面側の相対向する２箇所に表面側親水膜１９および裏面側親水膜２０を設け、表面側親水膜１９および裏面側親水膜２０の各表面に表面側水膜２１および裏面側水膜２２を付着させ、移動電極１０の下面に設けられた移動体支持板２３の周囲面の相対向する２箇所に移動体親水膜２４を設けた点である。この場合、側壁８の内面の表面側親水膜１９および裏面側親水膜２０が設けられた部分以外は疎水面となっている。 (Sixth embodiment)
FIG. 11 is a cross-sectional view showing a white display state of one pixel portion of a display device as a sixth embodiment of the present invention. This display device is different from the display device shown in FIG. 1 in that the surface-side hydrophilic film 19 and the back-side hydrophilic film 20 are provided at two opposite positions on the front surface side of the inner surface of the side wall 8 and at two opposite positions on the rear surface side. The front surface side water film 21 and the back surface side water film 22 are attached to the respective surfaces of the front surface side hydrophilic film 19 and the back surface side hydrophilic film 20, and the peripheral surface of the moving body support plate 23 provided on the lower surface of the moving electrode 10 The movable body hydrophilic film 24 is provided at two opposite positions. In this case, the surface other than the portion provided with the front surface side hydrophilic film 19 and the rear surface side hydrophilic film 20 on the inner surface of the side wall 8 is a hydrophobic surface.

そして、この表示装置では、図１１に示すように、裏面側電極板６と移動電極１０との間に発生させるクーロン力による引力（表面側親水膜１９と移動体親水膜２４との間に介在された表面側水膜２１の凝集力に打ち勝つ程度の引力）により、弾性層１１、移動体支持板２３および移動体親水膜２４を含む移動電極１０が裏面側に向かって移動し、移動体支持板２３の下面が裏面側（透明）板２上の絶縁膜７の上面に当接して、白色表示に切り換えた後には、裏面側電極板６と移動電極１０間への電圧の印加を停止しても、互いに対向するように位置する裏面側親水膜２０と移動体親水膜２４との間に介在された裏面側水膜２２の凝集力（水の凝集力は一般的に小さいが、ナノメートル、マイクロメートルの世界では比較的大きい）により、移動体支持板２３の下面が裏面側（透明）板２上の絶縁膜７の上面に当接した状態を確実に維持することができる。 In this display device, as shown in FIG. 11, the attractive force due to the Coulomb force generated between the back surface side electrode plate 6 and the moving electrode 10 (intervened between the front surface side hydrophilic film 19 and the moving body hydrophilic film 24). The moving electrode 10 including the elastic layer 11, the moving body support plate 23, and the moving body hydrophilic film 24 moves toward the back surface side by an attractive force that overcomes the cohesive force of the surface-side water film 21 thus formed, and supports the moving body. After the lower surface of the plate 23 comes into contact with the upper surface of the insulating film 7 on the back side (transparent) plate 2 and switches to white display, the application of voltage between the back side electrode plate 6 and the movable electrode 10 is stopped. However, the cohesive force of the back-side water film 22 interposed between the back-side hydrophilic film 20 and the moving body hydrophilic film 24 positioned so as to face each other (the cohesive force of water is generally small, but nanometer , Relatively large in the micrometer world) A state in which the lower surface of the body support plate 23 is in contact with the back surface side (transparent) top surface of the insulating film 7 on the plate 2 can be reliably maintained.

一方、図１２に示すように、表面側電極板４と移動電極１０との間に発生させるクーロン力による引力（裏面側親水膜２０と移動体親水膜２４との間に介在された裏面側水膜２２の凝集力に打ち勝つ程度の引力）により、弾性層１１、移動体支持板２３および移動体親水膜２４を含む移動電極１０が表面側に向かって移動し、弾性層１１の表面側が表面側透明板１の凸凹面（作用面）３に適宜に弾性変形して押し付けられて、黒色表示に切り換えた後には、表面側電極板４と移動電極１０間への電圧の印加を停止しても、互いに対向するように位置する表面側親水膜１９と移動体親水膜２４との間に介在された表面側水膜２１の凝集力により、弾性層１１の表面側が表面側透明板１の凸凹面（作用面）３に適宜に弾性変形して押し付けられた状態を確実に維持することができる。
したがって、この表示装置でも、表示内容を変えない限りは電力を加える必要はなく、非常に低消費電力化することができる。 On the other hand, as shown in FIG. 12, the attractive force due to the Coulomb force generated between the front surface side electrode plate 4 and the moving electrode 10 (the back side water intervening between the back side hydrophilic film 20 and the moving body hydrophilic film 24). The moving electrode 10 including the elastic layer 11, the movable body support plate 23, and the movable body hydrophilic film 24 moves toward the surface side by an attractive force that overcomes the cohesive force of the film 22, and the surface side of the elastic layer 11 is the surface side. Even if the application of voltage between the front-side electrode plate 4 and the moving electrode 10 is stopped after being appropriately elastically deformed and pressed against the uneven surface (working surface) 3 of the transparent plate 1 and switching to black display, Because of the cohesive force of the surface-side water film 21 interposed between the surface-side hydrophilic film 19 and the movable body hydrophilic film 24 positioned so as to oppose each other, the surface side of the elastic layer 11 is an uneven surface of the surface-side transparent plate 1. (Working surface) 3 was appropriately elastically deformed and pressed It is possible to reliably maintain the state.
Therefore, even in this display device, it is not necessary to apply power as long as the display contents are not changed, and the power consumption can be greatly reduced.

上記第６実施形態では、側壁８の内面の表面側の相対向する２箇所および裏面側の相対向する２箇所に表面側親水膜１９および裏面側親水膜２０を設け、側壁８の内面の表面側親水膜１９および裏面側親水膜２０が設けられた部分以外は疎水面とし、移動電極１０の下面に設けられた移動体支持板２３の周囲面の相対向する２箇所に移動体親水膜２４を設け、表面側親水膜１９および裏面側親水膜２０の各表面に表面側水膜２１および裏面側水膜２２を付着させるようにしたが、逆に、表面側親水膜１９および裏面側親水膜２０の代わりに、それぞれ表面側親油膜および裏面側親油膜を設け、側壁８の内面の表面側親油膜および裏面側親油膜が設けられた部分以外は親水面とし、表面側水膜２１および裏面側水膜２２の代わりに表面側油膜および裏面側油膜を付着させる構成にしてもよい。 In the sixth embodiment, the surface-side hydrophilic film 19 and the back-side hydrophilic film 20 are provided at two opposite positions on the surface side of the inner surface of the side wall 8 and at two opposite positions on the rear surface side, and the surface of the inner surface of the side wall 8 is provided. Except for the portions where the side hydrophilic film 19 and the back surface side hydrophilic film 20 are provided, the surface is a hydrophobic surface, and the moving body hydrophilic film 24 is provided at two opposite positions on the peripheral surface of the moving body support plate 23 provided on the lower surface of the moving electrode 10. And the surface side water film 21 and the back surface side water film 22 are attached to the respective surfaces of the front surface side hydrophilic film 19 and the back surface side hydrophilic film 20. 20 is provided with a front-side lipophilic film and a back-side lipophilic film, respectively, except for a portion of the inner surface of the side wall 8 where the front-side lipophilic film and the back-side lipophilic film are provided. Instead of the side water film 22, the surface side oil film It may be configured to attach the fine backside oil film.

（その他の実施形態）
図１、図７、図９および図１１に示す白色表示状態から図２、図８、図１０および図１２に示す黒色表示状態に切り換えるとき、表面側電極板４と移動電極１０間に電圧を印加し、表面側電極板４と移動電極１０間にクーロン力による引力を発生させるとともに、移動電極１０に印加した電圧により誘導される電荷と同符号の電荷が裏面側電極板６に誘導されるように、表面側電極板４と裏面側電極板６間にも表面側電極板４と移動電極１０間と同極性の電圧を印加し、裏面側電極板６と移動電極１０との間にクーロン力による斥力を発生させるようにしてもよい。 (Other embodiments)
When switching from the white display state shown in FIGS. 1, 7, 9 and 11 to the black display state shown in FIGS. 2, 8, 10 and 12, a voltage is applied between the surface side electrode plate 4 and the movable electrode 10. When applied, an attractive force due to a Coulomb force is generated between the front surface side electrode plate 4 and the moving electrode 10, and a charge having the same sign as the charge induced by the voltage applied to the moving electrode 10 is induced to the back side electrode plate 6. As described above, a voltage having the same polarity as that between the front surface side electrode plate 4 and the movable electrode 10 is applied between the front surface side electrode plate 4 and the rear surface side electrode plate 6, and the Coulomb is applied between the rear surface side electrode plate 6 and the movable electrode 10. You may make it generate the repulsion by force.

また、図２、図８、図１０および図１２に示す黒色表示状態から図１、図７、図９および図１１に示す白色表示状態に切り換えるとき、裏面側電極板６と移動電極１０間に電圧を印加し、裏面側電極板６と移動電極１０間にクーロン力による引力を発生させるとともに、移動電極１０に印加した電圧により誘導される電荷と同符号の電荷が表面側電極板４に誘導されるように、裏面側電極板６と表面側電極板４間にも裏面側電極板６と移動電極１０間と同極性の電圧を印加し、表面側電極板４と移動電極１０との間にクーロン力による斥力を発生させるようにしてもよい。 Further, when switching from the black display state shown in FIGS. 2, 8, 10 and 12 to the white display state shown in FIGS. 1, 7, 9 and 11, a gap is formed between the back electrode plate 6 and the movable electrode 10. A voltage is applied to generate an attractive force due to the Coulomb force between the back-side electrode plate 6 and the moving electrode 10, and a charge having the same sign as the charge induced by the voltage applied to the moving electrode 10 is induced to the front-side electrode plate 4. As described above, a voltage having the same polarity as that between the back surface side electrode plate 6 and the moving electrode 10 is applied between the back surface side electrode plate 6 and the front surface side electrode plate 4. A repulsive force due to the Coulomb force may be generated.

また、図１、図２および図７〜図１２に示す表示装置において、裏面側電極板６（と絶縁膜７）を省略し、表面側電極板４と移動電極１０に同符号の電荷が誘導されるように、基準となる電位（例えばＧＮＤ）に対して、表面側電極板４と移動電極１０にそれぞれ同極性の電圧を印加し、表面側電極板４と移動電極１０との間にクーロン力による斥力を発生させると、図１、図７、図９および図１１に示すような白色表示状態となり、一方、表面側電極板４と移動電極１０間に電圧を印加し、表面側電極板４と移動電極１０との間にクーロン力による引力を発生させると、図２、図８、図１０および図１２に示すような黒色表示状態となるようにしてもよい。 Further, in the display device shown in FIGS. 1, 2, and 7 to 12, the back-side electrode plate 6 (and the insulating film 7) is omitted, and charges of the same sign are induced in the front-side electrode plate 4 and the moving electrode 10. As described above, a voltage having the same polarity is applied to the surface side electrode plate 4 and the moving electrode 10 with respect to a reference potential (for example, GND), and the Coulomb is applied between the surface side electrode plate 4 and the moving electrode 10. When a repulsive force is generated, a white display state is obtained as shown in FIGS. 1, 7, 9, and 11, while a voltage is applied between the surface-side electrode plate 4 and the moving electrode 10, and the surface-side electrode plate When an attractive force due to the Coulomb force is generated between the moving electrode 10 and the moving electrode 10, a black display state as shown in FIGS. 2, 8, 10, and 12 may be obtained.

また、図１、図２および図７〜図１２に示す表示装置において、表面側電極板４（と絶縁膜５）を省略し、裏面側電極板６と移動電極１０間に電圧を印加し、裏面側電極板６と移動電極１０との間にクーロン力による引力を発生させると、図１、図７、図９および図１１に示すような白色表示状態となり、一方、裏面側電極板６と移動電極１０に同符号の電荷が誘導されるように、基準となる電位（例えばＧＮＤ）に対して、裏面側電極板６と移動電極１０にそれぞれ同極性の電圧を印加し、裏面側電極板６と移動電極１０との間にクーロン力による斥力を発生させると、図２、図８、図１０および図１２に示すような黒色表示状態となるようにしてもよい。 Further, in the display device shown in FIGS. 1, 2, and 7 to 12, the front side electrode plate 4 (and the insulating film 5) is omitted, and a voltage is applied between the back side electrode plate 6 and the moving electrode 10, When an attractive force due to the Coulomb force is generated between the back surface side electrode plate 6 and the moving electrode 10, a white display state as shown in FIGS. 1, 7, 9, and 11 is obtained. A voltage having the same polarity is applied to the back-side electrode plate 6 and the moving electrode 10 with respect to a reference potential (for example, GND) so that charges of the same sign are induced in the moving electrode 10, and the back-side electrode plate When a repulsive force due to Coulomb force is generated between the movable electrode 10 and the moving electrode 10, a black display state as shown in FIGS. 2, 8, 10, and 12 may be obtained.

また、図３、図４に示す表示装置において、裏面側（透明）基板２の内面に裏面側電極板６と絶縁膜７を設け、図３に示す白色表示状態から図４に示す黒色表示状態に切り換えるとき、表面側電極板４と移動電極１０間に電圧を印加し、表面側電極板４と移動電極１０間にクーロン力による引力を発生させるとともに、移動電極１０に印加した電圧により誘導される電荷と同符号の電荷が裏面側電極板６に誘導されるように、表面側電極板４と裏面側電極板６間にも表面側電極板４と移動電極１０間と同極性の電圧を印加し、裏面側電極板６と移動電極１０との間にクーロン力による斥力を発生させるようにしてもよい。 Further, in the display device shown in FIGS. 3 and 4, the back side electrode plate 6 and the insulating film 7 are provided on the inner surface of the back side (transparent) substrate 2, and the white display state shown in FIG. 3 to the black display state shown in FIG. 4. When switching to, a voltage is applied between the surface-side electrode plate 4 and the moving electrode 10 to generate an attractive force due to the Coulomb force between the surface-side electrode plate 4 and the moving electrode 10 and is induced by the voltage applied to the moving electrode 10. The voltage having the same polarity as that between the front surface side electrode plate 4 and the movable electrode 10 is also applied between the front surface side electrode plate 4 and the rear surface side electrode plate 6 so that a charge having the same sign as that of the back surface side electrode plate 6 is induced. The repulsive force may be generated between the back side electrode plate 6 and the moving electrode 10 by the Coulomb force.

また、図３、図４に示す表示装置において、表面側電極板４（と絶縁膜５）を省略し、裏面側（透明）基板２の内面に裏面側電極板６を設け、裏面側電極板６と移動電極１０に同符号の電荷が誘導されるように、基準となる電位（例えばＧＮＤ）に対して、裏面側電極板６と移動電極１０にそれぞれ同極性の電圧を印加し、裏面側電極板６と移動電極１０との間にクーロン力による斥力を発生させると、図４に示すような黒色表示状態となるようにしてもよい。 3 and 4, the front surface side electrode plate 4 (and the insulating film 5) is omitted, and the rear surface side electrode plate 6 is provided on the inner surface of the rear surface side (transparent) substrate 2, and the rear surface side electrode plate. 6 and the moving electrode 10 are applied with voltages of the same polarity on the back side electrode plate 6 and the moving electrode 10 with respect to a reference potential (for example, GND) so that charges having the same sign are induced on the back side. When a repulsive force due to a Coulomb force is generated between the electrode plate 6 and the moving electrode 10, a black display state as shown in FIG. 4 may be obtained.

また、図５、図６に示す表示装置において、表面側透明基板１の外面に表面側電極板４（と絶縁膜５）を設け、図５に示す黒色表示状態から図６に示す白色表示状態に切り換えるとき、裏面側電極板６と移動電極１０間に電圧を印加し、裏面側電極板６と移動電極１０間にクーロン力による引力を発生させるとともに、移動電極１０に印加した電圧により誘導される電荷と同符号の電荷が表面側電極板４に誘導されるように、裏面側電極板６と表面側電極板４にも裏面側電極板６と移動電極１０間と同極性の電圧を印加し、表面側電極板４と移動電極１０との間にクーロン力による斥力を発生させるようにしてもよい。 Further, in the display device shown in FIGS. 5 and 6, the surface side electrode plate 4 (and the insulating film 5) is provided on the outer surface of the surface side transparent substrate 1, and the white display state shown in FIG. 6 from the black display state shown in FIG. When switching to, a voltage is applied between the back side electrode plate 6 and the moving electrode 10 to generate an attractive force due to the Coulomb force between the back side electrode plate 6 and the moving electrode 10 and is induced by the voltage applied to the moving electrode 10. A voltage having the same polarity as that between the back-side electrode plate 6 and the moving electrode 10 is applied to the back-side electrode plate 6 and the front-side electrode plate 4 so that a charge having the same sign as that of the charge is induced in the front-side electrode plate 4. Then, a repulsive force due to the Coulomb force may be generated between the surface side electrode plate 4 and the moving electrode 10.

また、図５、図６に示す表示装置において、裏面側電極板６（と絶縁膜７）を省略し、表面側透明基板１の外面に表面側電極板４（と絶縁膜５）を設け、表面側電極板４と移動電極１０に同符号の電荷が誘導されるように、基準となる電位（例えばＧＮＤ）に対して、表面側電極板４と移動電極１０にそれぞれ同極性の電圧を印加し、表面側電極板４と移動電極１０との間にクーロン力による斥力を発生させると、図６に示すような白色表示状態となるようにしてもよい。 5 and 6, the back side electrode plate 6 (and the insulating film 7) is omitted, and the front side electrode plate 4 (and the insulating film 5) is provided on the outer surface of the front side transparent substrate 1. A voltage having the same polarity is applied to the surface side electrode plate 4 and the moving electrode 10 with respect to a reference potential (for example, GND) so that charges of the same sign are induced in the surface side electrode plate 4 and the moving electrode 10. When a repulsive force due to the Coulomb force is generated between the surface side electrode plate 4 and the moving electrode 10, a white display state as shown in FIG. 6 may be obtained.

また、上記第４〜第６実施形態では、表示維持の状態において、全ての電極板４、６、１０への電圧の印加を停止（オープンに）するとして説明したが、全ての電極板４、６、１０を同電位、例えば０Ｖ（ＧＮＤ）にしてクーロン力が発生しないようにしてもよい。この場合も、停止（オープンに）する場合と同様に、電力は消費しない。 In the fourth to sixth embodiments, the application of voltage to all the electrode plates 4, 6, and 10 is stopped (open) in the display maintenance state. However, all the electrode plates 4, 6 and 10 may be set to the same potential, for example, 0 V (GND) so that no Coulomb force is generated. In this case as well, power is not consumed as in the case of stopping (opening).

さらに、上記各実施形態では、弾性層１１は黒色であるとして説明したが、これに限らず、それ以外の青色、赤色などの他色のものを用いてもよい。例えば、シリコーンゴムの場合は、成形時に配合する顔料により、色を変えることが可能である。あるいは、それ自体に色が付いていない弾性体を着色して用いてもよい。 Further, in each of the above embodiments, the elastic layer 11 is described as being black. However, the present invention is not limited thereto, and other colors such as blue and red may be used. For example, in the case of silicone rubber, the color can be changed by a pigment to be blended at the time of molding. Or you may color and use the elastic body which is not colored in itself.

また、弾性層１１を無色透明とし、弾性層１１と移動電極１０との間に黒色、青色、赤色などの有色層を設けるようにしてもよい。この場合、表面側透明板１の凸凹面（作用面）３に弾性層１１が押し付けられていないときは、散乱反射により白色表示となり、表面側透明板１の凸凹面（作用面）３に弾性層１１が押し付けられているときは、散乱反射は起こらず、弾性層１１と移動電極１０との間に設けられた有色層の色による有色表示となる。 The elastic layer 11 may be colorless and transparent, and a colored layer such as black, blue, or red may be provided between the elastic layer 11 and the moving electrode 10. In this case, when the elastic layer 11 is not pressed against the uneven surface (working surface) 3 of the front surface side transparent plate 1, white display is obtained by scattering reflection, and the uneven surface (working surface) 3 of the front surface side transparent plate 1 is elastic. When the layer 11 is pressed, scattering reflection does not occur, and a colored display according to the color of the colored layer provided between the elastic layer 11 and the moving electrode 10 is obtained.

さらに、上記各実施形態では、移動電極と弾性層は別体として説明したが、移動電極が例えば、網状のもので、弾性層と一体になっているようなもの、あるいは、導電性微粒子が弾性層に含まれているようなもので、電圧が印加可能なようになっている機能弾性体であってもよい。 Further, in each of the embodiments described above, the moving electrode and the elastic layer have been described as separate bodies. However, the moving electrode is, for example, a net-like one that is integrated with the elastic layer, or the conductive fine particles are elastic. It may be a functional elastic body that is included in the layer and to which a voltage can be applied.

この発明の第１実施形態としての表示装置の１画素部分の白色表示状態を示す断面図。Sectional drawing which shows the white display state of 1 pixel part of the display apparatus as 1st Embodiment of this invention. 図１に示す表示装置の黒色表示状態を示す断面図。Sectional drawing which shows the black display state of the display apparatus shown in FIG. この発明の第２実施形態としての表示装置の１画素部分の白色表示状態を示す断面図。Sectional drawing which shows the white display state of 1 pixel part of the display apparatus as 2nd Embodiment of this invention. 図３に示す表示装置の黒色表示状態を示す断面図。Sectional drawing which shows the black display state of the display apparatus shown in FIG. この発明の第３実施形態としての表示装置の１画素部分の黒色表示状態を示す断面図。Sectional drawing which shows the black display state of 1 pixel part of the display apparatus as 3rd Embodiment of this invention. 図５に示す表示装置の白色表示状態を示す断面図。Sectional drawing which shows the white display state of the display apparatus shown in FIG. この発明の第４実施形態としての表示装置の１画素部分の白色表示状態を示す断面図。Sectional drawing which shows the white display state of 1 pixel part of the display apparatus as 4th Embodiment of this invention. 図７に示す表示装置の黒色表示状態を示す断面図。Sectional drawing which shows the black display state of the display apparatus shown in FIG. この発明の第５実施形態としての表示装置の１画素部分の白色表示状態を示す断面図。Sectional drawing which shows the white display state of 1 pixel part of the display apparatus as 5th Embodiment of this invention. 図９に示す表示装置の黒色表示状態を示す断面図。Sectional drawing which shows the black display state of the display apparatus shown in FIG. この発明の第６実施形態としての表示装置の１画素部分の白色表示状態を示す断面図。Sectional drawing which shows the white display state of 1 pixel part of the display apparatus as 6th Embodiment of this invention. 図１１に示す表示装置の黒色表示状態を示す断面図。Sectional drawing which shows the black display state of the display apparatus shown in FIG.

Explanation of symbols

１表面側透明板（基板）
２裏面側（透明）板（基板）
３凸凹面（作用面）
４表面側電極板
５絶縁膜（保護膜）
６裏面側電極板
７絶縁膜（保護膜）
８側壁
９空間
１０移動電極
１１弾性層
１２隙間
１３圧縮コイルスプリング（弾性部材）
１４摺動部材支持部材
１５摺動部材
１６表面側永久磁石
１７裏面側永久磁石
１８磁性部材
１９表面側親水膜
２０裏面側親水膜
２１表面側水膜
２２裏面側水膜
２３移動体支持板
２４移動体親水膜 1 Surface side transparent plate (substrate)
2 Back side (transparent) plate (substrate)
3 Uneven surface (working surface)
4 Surface side electrode plate 5 Insulating film (protective film)
6 Back side electrode plate 7 Insulating film (protective film)
8 Side wall 9 Space 10 Moving electrode 11 Elastic layer 12 Gap 13 Compression coil spring (elastic member)
DESCRIPTION OF SYMBOLS 14 Sliding member support member 15 Sliding member 16 Front surface side permanent magnet 17 Back surface side permanent magnet 18 Magnetic member 19 Front surface side hydrophilic film 20 Back surface side hydrophilic film 21 Front surface side water film 22 Back surface side water film 23 Moving body support plate 24 Movement Body hydrophilic membrane

Claims

A space constituting one pixel surrounded by a front surface side substrate, a back surface side substrate, and a side wall provided therebetween;
A moving electrode provided in the space so as to be movable in the front-back direction;
An elastically deformable elastic layer provided on a surface of the moving electrode facing the surface-side substrate;
Moving electrode moving means for moving the moving electrode together with the elastic layer in the front and back direction;
Provided on the inner surface of the surface-side substrate, when the elastic layer is not pressed, it scatters and reflects light, and when the elastic layer is pressed, a working surface that transmits light;
A display device comprising:

The display device according to claim 1, wherein the elastic layer includes silicone rubber.

The display device according to claim 1, wherein the elastic layer is colored, or the elastic layer is transparent, and a colored layer is provided between the elastic layer and the moving electrode. Display device.

The display device according to claim 1, wherein the moving electrode moving unit includes:
The moving electrode;
At least one of a front surface side electrode provided on the front surface side substrate and a back surface side electrode provided on the back surface side substrate; and
A display device comprising voltage applying means for applying a voltage to the display.

The display device according to claim 1, wherein the moving electrode moving unit includes:
An elastic member that holds the elastic layer at a position away from the working surface of the surface-side substrate in an equilibrium state, or holds the elastic layer at a position that presses the elastic layer against the working surface of the surface-side substrate in an equilibrium state. A display device characterized by that.

The display device according to claim 1,
This state is maintained when the elastic layer is positioned away from the working surface of the surface-side substrate, or when the elastic layer is positioned so as to be pressed against the working surface of the surface-side substrate. An elastic layer position maintaining means for maintaining

The display device according to claim 6, wherein the elastic layer position maintaining unit includes a sliding member between a peripheral surface side of a support member that supports the elastic layer and the moving electrode and an inner surface of the side wall. Characteristic display device.

The display device according to claim 6, wherein the elastic layer position maintaining means is
A front surface side magnet and a back surface side magnet provided on the front surface side and the back surface side of the side wall, and a magnetic member provided on a peripheral surface side of a support member that supports the elastic layer and the moving electrode, or
A front surface side magnetic member and a back surface side magnetic member provided on the front surface side and the back surface side of the side wall, and a magnet provided on the peripheral surface side of the support member that supports the elastic layer and the moving electrode,
A display device characterized by that.

The display device according to claim 6, wherein the elastic layer position maintaining means is
A surface-side hydrophilic film and a back-side hydrophilic film provided on the front surface side and the back surface side of the inner surface of the side wall; and a moving body hydrophilic film provided on the peripheral surface side of the support member that supports the elastic layer and the moving electrode. A surface-side water film and a back-side water film provided on each surface of the front-side hydrophilic film and the back-side hydrophilic film, or
A surface-side lipophilic film and a back-side lipophilic film provided on the front surface side and the back surface side of the inner surface of the side wall; and a moving body lipophilic film provided on the peripheral surface side of the support member that supports the elastic layer and the moving electrode; The surface side oil film and the back side oil film provided on each surface of the surface side lipophilic film and the back side lipophilic film,
A display device characterized by that.