JP2018146824A - Display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display with high reliability, and a method for manufacturing the same.SOLUTION: There is provided a display comprising: a passivation film; a first substrate on the passivation film; an electro-optical device on the first substrate; a circuit board that is on the first substrate and transmits a signal for driving the electro-optical device; an opposing member on the electro-optical device; an adhesion layer on the opposing member; and a cover member on the adhesion layer. The passivation film covers the lateral faces of the adhesion layer. The display may further include terminals that are located on the first substrate and connected to the circuit board, and the undersurface of the circuit board may be in contact with the passivation film.SELECTED DRAWING: Figure 1

Description

  One embodiment of the present invention relates to a display device and a manufacturing method thereof.

  As typical examples of display devices, liquid crystal display devices and organic EL (Electroluminescence) display devices are known. Among them, liquid crystal display devices are most widely used as flat panel displays. A liquid crystal display device includes a liquid crystal element as an electro-optical element. The liquid crystal element includes a pair of electrodes (a pixel electrode and a counter (or common) electrode) and a liquid crystal compound layer (liquid crystal) sandwiched between them (a liquid crystal). A liquid crystal layer) as a basic structure. By sealing the liquid crystal element with a pair of substrates, impurities such as water, oxygen, and metal ions can be prevented from entering from the outside, whereby the reliability of the liquid crystal device can be improved. For example, Patent Documents 1 to 3 propose a structure for sealing a liquid crystal element. The electro-optical element is not limited to a liquid crystal element, and may be any element that changes optical characteristics using electricity, such as an organic light-emitting element, an inorganic light-emitting element, a MEMS shutter (Micro Electro Mechanical Systems), and an electrophoretic element. Good.

JP 2013-161023 A Japanese Patent No. 5198285 JP 2011-20335 A

  One of the problems of the embodiments of the present invention is to provide a display device having an electro-optical element such as a liquid crystal element, and a manufacturing method thereof. Alternatively, one of the problems of the embodiments of the present invention is to provide a highly reliable display device and a manufacturing method thereof.

  One embodiment of the present invention is a display device. A display device includes: a passivation film; a first substrate on the passivation film; an electro-optical element on the first substrate; a circuit board on the first substrate for transmitting a signal for driving the electro-optical element; And an opposing member on the electro-optic element, an adhesive layer on the opposing member, and a cover member on the adhesive layer. The passivation film covers the side surface of the adhesive layer.

  One embodiment of the present invention is a display device. The display device includes a passivation film, a first substrate on the passivation film, an electro-optic element on the first substrate, a circuit board that is on the electro-optic element and transmits a signal for driving the electro-optic element, A counter member on the circuit board, an adhesive layer on the counter member, and a cover member on the adhesive layer. The passivation film covers the side surface of the adhesive layer.

1 is a schematic perspective view of one display device according to an embodiment of the present invention. 1 is a schematic cross-sectional view of one display device according to an embodiment of the present invention. 1 is a schematic top view of one display device according to an embodiment of the present invention. 1 is a schematic top view of a pixel of one display device according to an embodiment of the present invention. 1 is a schematic cross-sectional view of a pixel of one display device according to an embodiment of the present invention. 1 is a schematic cross-sectional view showing a method for manufacturing one display device according to an embodiment of the present invention. 1 is a schematic cross-sectional view showing a method for manufacturing one display device according to an embodiment of the present invention. 1 is a schematic cross-sectional view showing a method for manufacturing one display device according to an embodiment of the present invention. 1 is a schematic cross-sectional view showing a method for manufacturing one display device according to an embodiment of the present invention. The typical perspective view showing the manufacturing method of one display device of the embodiment of the present invention. 1 is a schematic cross-sectional view showing a method for manufacturing one display device according to an embodiment of the present invention. The typical perspective view showing the manufacturing method of one display device of the embodiment of the present invention. 1 is a schematic cross-sectional view showing a method for manufacturing one display device according to an embodiment of the present invention. 1 is a schematic cross-sectional view of a pixel of one display device according to an embodiment of the present invention. 1 is a schematic cross-sectional view of one display device according to an embodiment of the present invention. 1 is a schematic cross-sectional view of one display device according to an embodiment of the present invention. 1 is a schematic cross-sectional view of one display device according to an embodiment of the present invention. 1 is a schematic cross-sectional view of one display device according to an embodiment of the present invention. 1 is a schematic cross-sectional view of one display device according to an embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention can be implemented in various modes without departing from the gist thereof, and is not construed as being limited to the description of the embodiments exemplified below.

  In order to make the explanation clearer, the drawings may be schematically represented with respect to the width, thickness, shape, and the like of each part as compared to the actual embodiment, but are merely examples and limit the interpretation of the present invention. Not what you want. In this specification and each drawing, elements having the same functions as those described with reference to the previous drawings may be denoted by the same reference numerals, and redundant description may be omitted.

  In the present invention, when a plurality of films are formed by processing a certain film, the plurality of films may have different functions and roles. However, the plurality of films are derived from films formed as the same layer in the same process, and have the same layer structure and the same material. Therefore, these plural films are defined as existing in the same layer.

  In the present specification and claims, in expressing a mode in which another structure is arranged on a certain structure, when it is simply expressed as “above”, it touches a certain structure unless otherwise specified. As described above, it includes both a case where another structure is disposed immediately above and a case where another structure is disposed via another structure above a certain structure.

  In the present specification and claims, the expression “a structure is exposed from another structure” means an aspect in which a part of a structure is not covered by another structure. The part which is not covered with the structure includes an aspect covered with another structure.

  In the present specification, “α includes A, B or C”, “α includes any of A, B and C”, “α is one selected from the group consisting of A, B and C” The expression “including” does not exclude the case where α includes a plurality of combinations of A to C unless otherwise specified. Furthermore, these expressions do not exclude the case where α includes other elements.

(First embodiment)
In this embodiment, a display device which is one of the embodiments of the present invention will be described. In the present embodiment, the structure of the display device 100 having a liquid crystal element as an electro-optical element will be described.

[1. overall structure]
FIG. 1 is a schematic perspective view of the display device 100. As shown in FIG. 1, the display device 100 includes a backlight 102 and a cover member 104. As described later, between the backlight 102 and the cover member 104, various components for exhibiting a function as a display device such as a liquid crystal element are provided, and these include a sealing film (hereinafter referred to as a passivation film) 106. And the cover member 104. By providing the passivation film 106, impurities can be prevented from entering the liquid crystal element or the like from the outside. In the example shown in FIG. 1, the passivation film 106 and the various components sealed thereby are located between the backlight 102 and the cover member 104, but the cover member 104 is attached to the passivation film 106 and the backlight 102. The display device 100 may be configured so as to be held between.

  The backlight 102 functions as a light source for a liquid crystal element provided in an area formed by the passivation film 106 and the cover member 104. The backlight 102 includes a light guide plate (not shown), a light source such as a cold cathode and a light emitting diode. The cover member 104 is a substrate that can transmit visible light, and can include, for example, glass, quartz, polymer, and the like. Examples of the polymer include acrylic resin, polyimide such as aromatic polyimide, polyamide such as aramid, polycarbonate and polyester containing an aromatic ring in the main chain.

  Cross-sectional schematic diagrams along the chain lines AA ′ and BB ′ in FIG. 1 are shown in FIGS. 2A and 2B, respectively. As shown in FIG. 2A, the display device 100 includes a first substrate 120 and a counter member (second substrate) on the first substrate 120 in a region formed by the passivation film 106 and the cover member 104. 122. As will be described later, a liquid crystal element is provided between the first substrate 120 and the facing member 122, and the driving of the liquid crystal element is controlled by a semiconductor element such as a transistor formed over the first substrate 120. .

  The first substrate 120 and the facing member 122 are a polymer. By using the above-described polymer, flexibility can be imparted to the first substrate 120 and the facing member 122, and the display device 100 can be molded into an arbitrary shape. Examples of the polymer include polyimide such as aromatic polyimide, polyamide such as aramid, and polycarbonate and polyester containing an aromatic ring in the main chain.

  By using the first substrate 120 and the counter member 122 described above, for example, a display device 100 that is partially curved or a display device 100 that has a folded structure as a whole can be provided. In the case where the display device 100 is used as a transmissive liquid crystal device, both the first substrate 120 and the counter member 122 may be formed using a material that transmits visible light. When the display device 100 is used as a reflective liquid crystal device, or when a light-emitting element is used as an electro-optical element, a material that transmits visible light may be used for at least one of the first substrate 120 and the counter member 122. In these cases, the backlight 102 may not be provided.

  The opposing member 122 may have a sealing film. In this case, the facing member 122 can be recognized as the second sealing film or the second passivation film. Specifically, a single-layer film or a stacked film including a plurality of films containing inorganic compounds such as silicon-containing inorganic compounds typified by silicon oxide, silicon nitride, silicon oxynitride, and silicon nitride oxide can be used as the facing member 122. . A film containing an organic compound such as a polymer may be further sandwiched between a plurality of films containing an inorganic compound.

  The display device 100 may further include one or both of the first polarizing plate 110 and the second polarizing plate 112 in a region formed by the passivation film 106 and the cover member 104. The first polarizing plate 110 and the second polarizing plate 112 are provided so as to sandwich the first substrate 120 and the facing member 122. For example, linear polarizing plates can be used as the first polarizing plate 110 and the second polarizing plate 112. In this case, the first polarizing plate 110 and the second polarizing plate 112 may be arranged in crossed Nicols. Although not shown, when the first polarizing plate 110 is not provided in the region formed by the passivation film 106 and the cover member 104, the display device 100 is configured such that the lower surface of the first substrate 120 is in contact with the passivation film 106. Is done.

  The cover member 104 is disposed on the facing member 122 via the adhesive layer 114. Thereby, the opposing member 122 is fixed to the cover member 104. As illustrated in FIG. 2A, the adhesive layer 114 may be in contact with the second polarizing plate 112. Although not illustrated, when the second polarizing plate 112 is not provided, the facing member 122 may be in contact with the adhesive layer 114.

The passivation film 106 is an insulating film containing an inorganic compound, an organic compound, or both. As an inorganic compound, it can select from the silicon-containing inorganic compound mentioned above. Examples of the organic compound include polymers having low permeability to gases such as oxygen and water vapor, that is, high gas barrier properties. For example, the water vapor transmission rate is 1 × 10 ⁻² g / m ² · day or more and 100 g / m ² · day or less, 1 × 10 ⁻² g / m ² · day or more and 50 g / m ² · day or less, or 1 × 10 ⁻ The polymer can be selected from ² g / m ² · day to 10 g / m ² · day or less. Examples of such polymers include polyolefins such as polyethylene and polypropylene and copolymers thereof, polyacrylonitrile and copolymers thereof, polyvinylidene chloride and copolymers thereof, aliphatic polyamides and copolymers thereof, polyethylene terephthalate and poly Examples thereof include polyesters such as naphthalene terephthalate, polyvinyl chloride and copolymers thereof, polyolefins containing fluorine in the side chain and copolymers thereof, polycarbonates having diaryl carbonate as a basic skeleton, and copolymers thereof. These polymers may have a linear chain structure, or may be crosslinked between molecules to form a three-dimensional network. In the case of using a polymer, for example, the above-described silicon-containing inorganic compound film may be laminated on one side or both sides of the polymer-containing film.

  As shown in FIG. 2A, the passivation film 106 covers the lower surface and side surfaces of the first substrate 120. More specifically, when one side surface of the first substrate 120 is defined as the first side surface 120_1 and the side surface opposite to the first side surface 120_1 is defined as the second side surface 120_2, the passivation film 106 includes the first side surface 120_1. The first side surface 120_1 and the second side surface 120_2 are covered together with the lower surface of the substrate 120. FIG. 2A shows an example in which the passivation film 106 is in contact with the first side surface 120_1 and the second side surface 120_2, but the passivation film 106 includes all of the first side surface 120_1 and the second side surface 120_2. Or you may leave | separate from a part. Similarly, the passivation film 106 covers the side surface of the facing member 122. The passivation film 106 may be in contact with a part or all of the side surface of the facing member 122 or may be separated.

  Further, the passivation film 106 can cover the side surface of the adhesive layer 114. In this case, the passivation film 106 can be provided in contact with the lower surface of the cover member 104. When the 1st polarizing plate 110 and the 2nd polarizing plate 112 are arrange | positioned in the area | region formed by the passivation film 106 and the cover member 104, the passivation film 106 may cover the side surface of these polarizing plates. Further, the side surface of the adhesive layer 114 covered by the passivation film 106 may be the side surface of the adhesive layer between the second polarizing plate 112 and the opposing member 122 (not shown). Similar to the first substrate 120, all or a part of the side surfaces of the adhesive layer 114, the first polarizing plate 110, and the second polarizing plate 112 may be in contact with or separated from the passivation film 106.

  As shown in FIG. 2B, a circuit board (or connector) 108 that transmits a signal for driving the liquid crystal element is provided over the first substrate 120. Examples of the circuit board 108 include a flexible printed circuit (FPC) board. Various signals such as a video signal supplied from an external circuit (not shown) are transmitted to the liquid crystal element through the circuit board 108, and an image is reproduced by the liquid crystal element. The circuit board 108 extends from the region formed by the passivation film 106 and the cover member 104 to the outside. At this time, the circuit board 108 may be disposed such that the lower surface of the circuit board 108 is in contact with the passivation film 106 and the upper surface is in contact with the adhesive layer 114 or the cover member 104. In other words, the circuit board 108 is sandwiched between the passivation film 106 and the adhesive layer 114 or between the passivation film 106 and the cover member 104. A region 124 surrounded by the circuit board 108, the cover member 104, the facing member 122, and the second polarizing plate 112 may be filled with an inert gas such as argon or nitrogen or dry air, or an epoxy resin or an acrylic resin. It may be filled with the resin.

[2. First substrate]
FIG. 3 is a schematic top view of the first substrate 120. As will be described later, various patterned insulating films, conductive films, and semiconductor films are stacked on the first substrate 120, and the pixel 132, the gate side driver circuit 134, the wiring 136, the terminal 138, and the like are constructed by these. The

  A plurality of pixels 132 can be arranged on the first substrate 120, and the display area 130 is defined by these pixels 132. Each of the pixels 132 can be provided with an anode, a pixel electrode, and a semiconductor element containing silicon, oxide, or the like that drive the electro-optic element.

  The terminals 138 can be provided so as to be arranged along one side of the first substrate 120. A wiring 136 extends from the display region 130 and the gate side driver circuit 134 toward the end portion of the first substrate 120 and is electrically connected to the terminal 138. Terminal 138 is connected to circuit board 108.

[3. Pixel]
4 and 5 are a schematic top view and a cross-sectional view of the pixel 132, respectively. A plurality of gate signal lines (scanning lines) 140 and video signal lines 142 are provided in the display area 130. Each pixel 132 includes a transistor 144. The transistor 144 includes a part of the gate signal line 140 (a part protruding upward in the drawing), a semiconductor film (semiconductor layer) 146, a source electrode 150, and a video signal line. Part of 142 (portion protruding rightward in the figure) is included. Part of the gate signal line 140 functions as the gate electrode 148 of the transistor 144, and part of the video signal line 142 functions as the drain electrode 151 of the transistor 144. Note that the names of the source electrode 150 and the drain electrode 151 of the transistor 144 are interchanged with each other depending on the direction of current or the polarity of the transistor. Although not illustrated, the pixel 132 may further include a capacitor, a semiconductor element containing other silicon, oxide, or the like.

  The pixel 132 further includes a pixel electrode 152 and a common electrode 156. The pixel electrode 152 may have a slit 154. The pixel electrode 152 is electrically connected to the transistor 144. The common electrode 156 is provided in a stripe shape in the direction in which the gate signal line 140 extends, and is shared by the plurality of pixels 132.

  As an arbitrary structure, the pixel 132 may include an auxiliary wiring 158 that is electrically connected to the common electrode 156. The auxiliary wiring 158 extends in the direction in which the video signal line 142 extends and can be shared by the plurality of pixels 132. By providing the auxiliary wiring 158, the conductivity of the common electrode 156 can be complemented. The auxiliary wiring 158 may be provided above or below the common electrode 156 so as to overlap with the video signal line 142.

  As shown in FIG. 5, the transistor 144 is provided on the first substrate 120 through an undercoat 160 having an arbitrary configuration. A planarization film 166 is provided over the transistor 144. A common electrode 156 is disposed thereon. In the case where the auxiliary wiring 158 is formed, the auxiliary wiring 158 is formed so as to be in contact with the common electrode 156.

  The display device 100 further includes an insulating film 168 that covers the common electrode 156 and the planarization film 166. The insulating film 168 has a function of electrically insulating the common electrode 156 and the pixel electrode 152. The pixel electrode 152 is provided over the planarization film 166 and the insulating film 168 and is electrically connected to the source electrode 150 in an opening formed in the planarization film 166 and the insulating film 168. A first alignment film 170 is further provided on the pixel electrode 152, and a liquid crystal layer 180 is disposed thereon.

  A counter member 122 is provided on the first alignment film 170 with a liquid crystal layer 180 interposed therebetween. The opposing member 122 may be provided with a light shielding film (black matrix) 184 and a color filter 186 via an undercoat film 190, an overcoat 182 that covers the light shielding film 184 and the color filter 186, and the like. The base film 190 and the overcoat 182 are films that prevent impurities from diffusing toward the liquid crystal layer 180 from the opposing member, the light shielding film 184, the color filter 186, and the like, and can include an inorganic compound. Examples of the inorganic compound include the silicon-containing inorganic compounds described above.

  The facing member 122 further includes a second alignment film 172 provided so as to be in contact with the liquid crystal layer 180. Similar to the first alignment film 170, the second alignment film 172 also has a function of aligning liquid crystals.

  Although not shown in the drawing, impurities are prevented from entering between the electro-optic element and the cover member 104 (for example, between the electro-optic element and the facing member 122 or between the facing member 122 and the second polarizing plate 112). A film containing an inorganic compound may be further provided. Examples of the inorganic compound include the silicon-containing inorganic compounds described above.

  As described above, the first substrate 120, the facing member 122, and the semiconductor element or liquid crystal element formed therebetween are sealed in the region formed by the passivation film 106 and the cover member 104. In the present embodiment, since the first substrate 120 and the facing member 122 are flexible polymers, the impurity permeability is high and the semiconductor element and the liquid crystal element are easily contaminated and deteriorated. However, the above-described passivation film and the cover member 104 can prevent the semiconductor element and the liquid crystal element from being contaminated and deteriorated by impurities, and the reliability of the display device 100 can be improved.

  As will be described later, the adhesive layer 114 can contain an organic compound. However, since the organic compound has higher hydrophilicity and gas permeability as compared with a silicon-containing inorganic compound that can be used in the passivation film 106, water, oxygen, or the like can be used. Low blocking against impurities. However, as described above, the passivation film 106 can be provided so as to cover the side surface of the adhesive layer 114 and to be in contact with the cover member 104. For this reason, since the adhesive layer 114 having a low blocking property against impurities can be confined within the region formed by the cover member 104 and the passivation film 106, the probability of the entry of impurities can be greatly reduced.

  When a glass substrate having a certain thickness (for example, 0.3 mm or more) is used as the cover member 104, the cover member 104 has a sufficient blocking property against impurities. On the other hand, the thickness of the cover member 104 may be reduced, or the display device 100 may be provided with flexibility using a substrate including a polymer as the cover member 104. In this case, the blocking property against impurities is deteriorated due to high gas permeability and hydrophilicity as compared with a normal glass substrate. However, as described above, in the display device 100, a film containing an inorganic compound may be formed thick (or a plurality of layers) between the facing member 122 and the cover member 104. Accordingly, even when a substrate including a resin or thin film glass is used as the cover member 104, high blocking properties against impurities can be maintained, and as a result, a highly reliable display device can be provided.

(Second Embodiment)
In the present embodiment, an example of a method for manufacturing the display device 100 will be described. The description will be made using a cross section taken along the chain line CC 'in FIG. Description of the contents described in the first embodiment may be omitted.

[1. pre-process]
As shown in FIG. 6A, a first substrate 120 over a supporting substrate 192, a transistor 144 formed over the first substrate 120, a pixel electrode 152, a common electrode 156, and the like that form a liquid crystal element are provided. Form. Specifically, the transistor 144 is provided over the undercoat 160, and the common electrode 156, the pixel electrode 152, the auxiliary wiring 158, and the insulating film 168 are provided thereon via the planarization film 166. Further, a first alignment film 170 is formed on the pixel electrode. These can be formed by applying known materials and techniques.

  The counter member 122 is formed on the support substrate 198, and the base film 190, the light shielding film 184, the color filter 186, and the overcoat 182 that covers the light shielding film 184 and the color filter 186 are formed thereon (FIG. 6B). ). The base film 190 and the overcoat 182 have an arbitrary configuration and are not necessarily provided. A second alignment film 172 is provided over the light shielding film 184 and the color filter 186. These can also be formed by applying known materials and methods.

[2. Cell assembly]
As illustrated in FIG. 7, the first substrate 120 and the counter member 122 are bonded to each other so that the first alignment film 170 and the second alignment film 172 are sandwiched, and a liquid crystal layer 180 is provided therebetween.

  Next, the support substrate 198 is separated from the facing member 122. Specifically, for example, a laser or a flash lamp is used to irradiate the interface between the support substrate 198 and the counter member 122 (the interface indicated by the dotted arrow in FIG. 8), so that the support substrate 198 and the counter member are The adhesive force between 122 is reduced. Thereafter, the support substrate 198 is physically peeled along this interface.

  After peeling off the support substrate 198, the second polarizing plate 112 is formed on the opposing member 122 (FIG. 8). Although not shown, before the second polarizing plate 112 is formed, a film containing an inorganic compound may be formed over the opposing member 122 by applying a chemical vapor deposition (CVD) method or a sputtering method. Thereafter, the support substrate 192 side is peeled off in the same manner as the separation of the support substrate 198, and the first polarizing plate 110 is formed below the first substrate 120 (FIG. 9). Thereafter, the circuit board 108 is connected to the terminal 138 (FIG. 10).

[3. Sealing]
After the cell set, the cover member 104 is fixed on the opposing member 122 via the adhesive layer 114 (FIGS. 11 and 12). In the case where the second polarizing plate 112 is provided, the adhesive layer 114 can be in contact with the second polarizing plate 112. On the other hand, in the case where the second polarizing plate 112 is not provided, the adhesive layer 114 is in contact with the opposing member 122 or a film containing an inorganic compound formed thereon. The adhesive layer 114 can include an organic compound. As the organic compound, for example, a polymer such as an epoxy resin, an acrylic resin, or a novolac resin can be used.

  When the cover member 104 is provided, the circuit board 108 is bent and fixed to the adhesive layer 114 as shown in FIG. At this time, in order to fill the region 124 with resin, an epoxy resin or an acrylic resin may be applied and cured on the first substrate 120 and the circuit substrate 108, and the circuit substrate 108 may be bent so as to cover the side surfaces.

  Thereafter, as shown in FIGS. 1 and 13, a passivation film 106 is formed. As described in the first embodiment, the passivation film 106 is provided so as to cover the lower surface and the side surface of the first substrate 120, and can further be configured to cover the side surface of the adhesive layer 114. When the passivation film 106 includes an inorganic compound, the passivation film 106 can be formed using a CVD method or a sputtering method. On the other hand, when the passivation film 106 includes an organic compound such as a polymer, the passivation film 106 is formed by applying a lamination method or the above-described wet film formation method. Alternatively, the passivation film 106 may be formed by applying a polymer or a monomer that is a raw material of the polymer using a spray method and then polymerizing the monomer or oligomer.

  A backlight 102 is installed under the passivation film 106 (see FIG. 1). The display device 100 can be manufactured through the above steps.

(Third embodiment)
In the present embodiment, a display device 200 having a structure different from that of the display device 100 will be described with reference to FIGS. FIG. 14 is a schematic cross-sectional view of the pixel 132 of the display device 200. FIG. 15 is a schematic cross-sectional view of the display device 200 and corresponds to a cross section taken along the chain line BB ′ of FIG. A description of the same configuration as in the first and second embodiments may be omitted.

  The display device 200 is different from the display device 100 in that the transistor 144 that drives the pixel 132 is provided on the counter member 122 side. Specifically, the opposing member 122 is provided with a light shielding film 184 and a color filter 186, and a transistor 144 is provided therebetween. In FIG. 14, when it is recognized that the facing member 122 exists above the first substrate 120, an overcoat 182 for protecting them is provided under the light-shielding film 184 and the color filter 186, and the transistor 144 is provided thereunder. A gate electrode 148 is formed. A semiconductor film 146 is formed under the gate electrode 148 with a gate insulating film 162 interposed therebetween, and the source electrode 150 and the drain electrode 151 are electrically connected to the semiconductor film 146. In the example shown in FIG. 14, an insulating film 176 is provided between the semiconductor film 146 and the source electrode 150 and between the semiconductor film 146 and the drain electrode 151, and the insulating film 176 protects the channel region of the semiconductor film 146. Functions as a membrane. Here, the transistor 144 is illustrated as a bottom-gate transistor; however, the structure of the transistor 144 is not limited. The pixel electrode 152, the common electrode 156, the auxiliary wiring 158, and the like are provided below the transistor 144 through the planarization film 166, and the liquid crystal layer 180 is disposed below the pixel electrode 152 through the first alignment film 170. .

  In the case where the light-blocking film 184 and the color filter 186 have low heat resistance, an oxide semiconductor may be used as the semiconductor film 146. This is because a semiconductor film containing an oxide semiconductor can be formed even at a relatively low temperature.

  When such a structure is employed, the terminal 138 can be formed on the opposing member 122 side. Therefore, as shown in FIG. 15, the facing member 122 is positioned on the circuit board 108. Further, the circuit board 108 may be connected to a terminal 138 provided on the facing member 122, and the upper surface thereof may be in contact with the upper surface and the side surface of the facing member 122 and the side surface of the second polarizing plate 112. The lower surface of the circuit board 108 is in contact with the passivation film 106. Similarly to the display device 100, the passivation film 106 can cover the side surface of the adhesive layer 114 also in the display device 200.

  In the case where the above-described structure is employed, since not only the color filter 186 and the light-shielding film 184 but also the transistor 144 and the pixel electrode 152 are formed on the opposing member 122, the alignment margin when the first substrate 120 is bonded is increased. Can be bigger. For this reason, the manufacturing yield of the display device can be improved.

(Fourth embodiment)
In this embodiment, a display device 210 having a structure different from that of the display devices 100 and 200 will be described with reference to FIGS. 16A and 16B. 16A and 16B are schematic cross-sectional views of the display device 210, and correspond to cross-sections along the chain lines AA ′ and BB ′ in FIG. 1, respectively. A description of the same configuration as in the first to third embodiments may be omitted.

  As shown in these drawings, the display device 210 is different from the display devices 100 and 210 in that the backlight 102 is provided in an area formed by the passivation film 106 and the cover member 104. The backlight 102 is located between the passivation film 106 and the first substrate 120. The display device 210 may be configured such that the backlight 102 is in contact with the passivation film 106 and the first polarizing plate 110. The power supply to the backlight 102 can be performed, for example, through an opening 188 (FIG. 16B) provided on the side surface of the passivation film 106.

  When such a configuration is applied, the passivation film 106 does not need to transmit visible light. Therefore, in addition to the materials described in the first embodiment, for example, metal (that is, zero-valent metal) can be used for the passivation film 106. For example, a lamination of a film containing a polymer described in the first embodiment and a film containing a zero-valent metal such as aluminum (metal film) can be used as the passivation film 106. In this case, the metal film can be formed on a film containing a polymer by using a vapor deposition method, a sputtering method, or the like. For this reason, higher sealing ability can be imparted to the passivation film 106. In order to release heat from the backlight, a slit may be formed in the passivation film 106 within a range in which the blocking property is not greatly deteriorated.

(Fifth embodiment)
In this embodiment, a display device 220 having a structure different from that of the display devices 100, 200, and 210 will be described with reference to FIGS. 17A and 17B are schematic cross-sectional views of the display device 210, and correspond to a cross section taken along the chain line AA ′ in FIG. FIG. 17C is an enlarged view of a region 222 in FIG.

  The display device 220 is different from the display devices 100, 200, 210, and 220 in that the passivation film 106 is in contact with the polarizing film 110a having a function of polarizing visible light. By using the passivation film 106 as a protective film of the polarizing film 110a, the display device 220 is thinned and manufactured easily.

  The polarizing film 110a includes, for example, a polymer such as polyvinyl alcohol having a main chain oriented in approximately one direction or partially saponified polyvinyl acetate, and iodine. Due to the orientation of the main chain, the polarizing film 110a can convert visible light into linearly polarized light. This polarizing film is generally sandwiched between two triacetyl cellulose (TAC) films. In the present embodiment, the protective film is the passivation film 106. That is, the polarizing film 110a is in direct contact with the passivation film 106. In this case, the passivation film 106 may be disposed between the first substrate 120 and the polarizing film 110a. In addition, a preferred form is a form in which one protective film is a passivation film 106 and the other protective film is a TAC film that has been used conventionally.

  As shown in FIG. 17A, the passivation film 106 may cover the first substrate 120, the facing member 122, the second polarizing plate 112, and the side surfaces of the adhesive layer 114. Moreover, you may contact these side surfaces. Alternatively, as illustrated in FIG. 17B, the polarizing film 110a overlaps with the first substrate 120, but the side surface may not be covered.

  As shown in FIG. 17C, a protective film 110b may be provided between the polarizing film 110a and the first substrate 120. The protective film 110b is made of a partially acetylated cellulose polymer such as triacetyl cellulose, a polyester such as polyethylene terephthalate, a polycarbonate having an aromatic ring in the main chain, a polymer such as polyolefin or a copolymer thereof. Can be included. The protective film 110b may include a plurality of layers containing these polymers.

(Sixth embodiment)
In the present embodiment, a display device 230 having a structure different from that of the display devices 100, 200, 210, and 220 will be described with reference to FIG. 18 is a schematic cross-sectional view of the display device 210 and corresponds to a cross section taken along the chain line AA ′ of FIG.

  The display device 230 is different from the display devices 100, 200, 210, and 220 in that a part thereof is curved. For example, as shown in FIG. 18, the display device 230 can have a curved region 234 and a flat region 232. In this example, two curved regions 234 are provided and the flat region 232 is sandwiched between the curved regions 234, but one curved region 234 may be provided. In this example, a part of the display device 230 is curved around an axis parallel to the long side of the display region 130, but one part of the display device 230 is centered around an axis parallel to the short side of the display region 130. A part or the whole may be curved.

  The curved region 234 can be formed by imparting flexibility to the first substrate 120 and the facing member 122. More specifically, by forming the first substrate 120 and the facing member 122 using the polymer described in the first embodiment, sufficient flexibility for forming the curved region 234 can be obtained. it can. In such a display device 230, as shown in FIG. 18, the backlight 102 and the cover member 104 can be configured such that the upper surface and the bottom surface thereof conform to the shapes of the curved region 234 and the flat region 232. In other words, the backlight 102 and the cover member 104 can also be configured such that the surfaces are curved in the curved region 234 and have a flat surface in the flat region 232.

  When the curved region 234 is provided as in the present embodiment, it may be difficult to attach a member that protects the back surface or the side surface of the display device 230. However, in the present embodiment, since the passivation film 106 is a molded sheet member, the passivation film can be bonded along the shape of the back surface and the side surface of the display device 230.

  Although not shown, the pixel 132 can be arranged from the flat region 232 to the curved region 234. For this reason, the curved region 234 can also provide an image. By providing an image using not only the flat area 232 but also the curved area 234, when the display device 230 is viewed from the front (the upper side of the cover member 104 in FIG. 18), the curved area 234 is an area other than the display area 130 ( The apparent area of the so-called frame region) can be reduced, and a display device with higher design can be provided.

(Seventh embodiment)
In this embodiment, a display device 240 having a structure different from that of the display devices 100, 200, 210, 220, and 230 will be described with reference to FIGS. 19 (A) and 19 (B). 19A and 19B are schematic cross-sectional views of the display device 250, and correspond to cross-sections along the chain lines AA ′ and BB ′ in FIG. 1, respectively.

  As shown in FIGS. 19A and 19B, the display device 240 includes display devices 100, 200, and 200 in that the adhesive layer 114 is provided between the facing member 122 and the second polarizing plate 112. Different from 210, 220, 230. The passivation film 106 is fixed to the cover member 104 via the second adhesive layer 115. Similarly, the circuit board 108 is also fixed to the cover member 104 via the second adhesive layer 115. Also in the display device 240, the side surface of the adhesive layer 114 is covered with the passivation film 106. Therefore, since the adhesive layer 114 is surrounded by the passivation film 106, the facing member 122, and the second polarizing plate 112, the probability of impurity intrusion can be reduced.

  In this specification, the case of a display device mainly having a liquid crystal element is exemplified as a disclosure example. However, the above-described embodiment is a self-luminous display device such as a light emitting element, or an electronic paper type having an electrophoretic element or the like. The present invention can be applied to various flat panel display devices such as a display device. Further, the present invention can be applied without particular limitation from small to medium size.

  Of course, other operational effects different from the operational effects brought about by the aspects of the above-described embodiments are obvious from the description of the present specification or can be easily predicted by those skilled in the art. It is understood that this is brought about by the present invention.

DESCRIPTION OF SYMBOLS 100: Display apparatus, 102: Backlight, 104: Cover member, 106: Passivation film, 108: Circuit board, 110: 1st polarizing plate, 110a: Polarizing film, 110b: Protective film, 112: 2nd polarizing plate , 114: adhesive layer, 120: first substrate, 120_1: first side surface, 120_2: second side surface, 122: counter member, 124: region, 130: display region, 132: pixel, 134: gate side drive Circuit: 136: Wiring, 138: Terminal, 140: Gate signal line, 142: Video signal line, 144: Transistor, 146: Semiconductor film, 148: Gate electrode, 150: Source electrode, 151: Drain electrode, 152: Pixel electrode 154: slit, 156: common electrode, 158: auxiliary wiring, 160: undercoat, 162: gate insulating film, 164: layer Film: 166: planarizing film, 168: insulating film, 170: first alignment film, 172: second alignment film, 176: insulating film, 180: liquid crystal layer, 182: overcoat, 184: light shielding film, 186 : Color filter, 188: Opening, 190: Base film, 192: Support substrate, 198: Support substrate, 200: Display device, 210: Display device, 220: Display device, 222: Region, 230: Display device, 232: Flat area, 234: curved area

Claims (12)

A passivation film,
A first substrate on the passivation film;
An electro-optic element on the first substrate;
A circuit board on the first substrate for transmitting a signal for driving the electro-optic element;
A counter member on the electro-optic element;
An adhesive layer on the opposing member;
A cover member on the adhesive layer;
The passivation film covers a lower surface of the first substrate and a side surface of the adhesive layer. A passivation film,
A first substrate on the passivation film;
An electro-optic element on the first substrate;
A circuit board on the electro-optic element and transmitting a signal for driving the electro-optic element;
An opposing member on the circuit board;
An adhesive layer on the opposing member;
A cover member on the adhesive layer;
The passivation film covers a lower surface of the first substrate and a side surface of the adhesive layer. A terminal on the first substrate and connected to the circuit board;
The display device according to claim 1, wherein a lower surface of the circuit board is in contact with the passivation film. Under the facing member, having a terminal to which the circuit board is connected,
The display device according to claim 2, wherein a lower surface of the circuit board is in contact with the passivation film.   The display device according to claim 1, wherein the passivation film is in contact with the cover member. The first substrate is
A first aspect;
Having a second side facing the first side;
The display device according to claim 1, wherein the passivation film covers the first side surface, the second side surface, and a lower surface of the first substrate. The passivation film covers a side surface of the first substrate and a side surface of the opposing member,
The display device according to claim 1, wherein the first substrate, the facing member, and the adhesive layer are in a region formed by the cover member and the passivation film. A polarizing film in contact with the passivation film;
The display device according to claim 1, wherein the polarizing film has a function of polarizing visible light.   The display device according to claim 1, further comprising a film containing an inorganic compound between the electro-optic element and the cover member.   The display device according to claim 1, wherein the display device has a curved region, and the passivation film is a sheet member.   The display device according to claim 1, wherein the first substrate has flexibility. A second polarizing plate located between the cover member and the opposing member;
The adhesive layer is between the opposing member and the second polarizing plate;
The passivation film covers the upper surface of the opposing member,
The display device according to claim 1, wherein the cover member is bonded to the passivation film.