JP2012093530A - Display device - Google Patents

Abstract

The present invention provides a highly reliable display device that is resistant to shock and vibration.
A display device according to the present invention includes a first substrate (array substrate) 1, a second substrate (color filter substrate) 2 having a lower contact strength than the first substrate 1, a first substrate 1 and a second substrate. A display panel (liquid crystal panel) 100 including a display element (liquid crystal) 4 sandwiched between substrates 2 is provided. The second substrate 2 is disposed so as to be inside from the first substrate 1 in plan view. For example, the first substrate and the second substrate are glass substrates, and the thickness of the second substrate is thinner than the first substrate.
[Selection] Figure 1B

Description

  The present invention relates to a display device. More specifically, the present invention relates to a display device on which a display panel including at least a pair of opposed substrates is mounted.

  In recent years, liquid crystal displays (LCDs) that display different images depending on the viewing angle have been applied as 3D-LCDs and 2-screen LCDs. The 3D-LCD displays parallax by visually recognizing images viewed from different viewpoints on the left and right eyes of an observer, and displays a stereoscopic image, and is also called a three-dimensional liquid crystal display device. On the other hand, the two-screen LCD displays two types of images having different contents simultaneously for a plurality of observers having different observation positions, and is also called a dual view liquid crystal.

  In these liquid crystal display devices, the viewing angle of images is generally separated by a striped parallax barrier provided in the display area. For example, left-eye pixels on which left-eye images are displayed and right-eye pixels on which right-eye images are displayed are alternately arranged via a parallax barrier. The parallax barrier is used for the left eye when the liquid crystal panel is viewed from the right direction so that the right eye pixel is viewed and the left eye pixel is not viewed, and when the liquid crystal panel is viewed from the left direction. The pixel is viewed so that the right-eye pixel is not viewed (see, for example, Patent Document 1). That is, the parallax barrier is, for example, striped on the surface of the color filter substrate of the liquid crystal panel on the viewer side so that the light shielding regions and light transmission regions extending in the vertical direction are alternately arranged in the horizontal direction. A light shielding film is applied.

  The above-described liquid crystal display device capable of 3D display and two-screen display (hereinafter collectively referred to as “liquid crystal display device”) includes a liquid crystal panel, a backlight unit, and the like as a basic configuration. The liquid crystal panel includes an array substrate, a color filter substrate, a liquid crystal sealed between the array substrate and the color filter substrate. The parallax barrier is arranged in parallel so as to be close to or in contact with any one of the array substrate and the color filter substrate in the liquid crystal panel.

The following relational expression (1) is established for the distance L between the liquid crystal of the liquid crystal panel and the parallax barrier.
<Equation 1> L = nPD / E (1)
Here, the distance between the two viewpoints is E (mm), the pixel pitch of the liquid crystal panel is P (mm), the distance between the observer and the display surface is D, and in the medium between the liquid crystal of the liquid crystal panel and the parallax barrier The refractive index is n.

  In this liquid crystal display device, the distance L between the liquid crystal of the liquid crystal panel and the parallax barrier decreases as the distance E between both viewpoints increases. In particular, in a small and medium-sized two-screen display device, the distance between both viewpoints is as large as about 90 cm, the distance D between the observer and the display surface is as small as about 60 cm, and the pixel pitch P is as small as about 100 μm. For this reason, if the medium between the liquid crystal of the liquid crystal panel and the parallax barrier is glass (refractive index 1.5), the value of L is as small as about 100 μm.

  The thickness of the glass substrate used for a general liquid crystal panel is about 0.6 mm. Therefore, the thickness of a general liquid crystal panel is about 1.2 mm. For example, in the case of manufacturing a liquid crystal display device having a thickness of L = 100 μm using a liquid crystal panel having such a thickness, it is necessary to polish or etch one substrate of the liquid crystal panel to have a thickness of 100 μm. is there. Furthermore, after that, it is necessary to form a parallax barrier on the outside of the thinned substrate.

Japanese Patent Laid-Open No. 3-119889

  However, when the thickness of the substrate is reduced only on one side of the liquid crystal panel, the end face strength is weaker as the glass substrate is thinner. As a result, the glass on the thin side tends to break when the end face of the liquid crystal panel comes into contact with the object. Even when the liquid crystal panel is incorporated in the module, if vibration or impact is applied, the panel end face comes into contact with a proximity member such as a frame, and the glass substrate on the thin side is cracked.

  In the above, the problems in the liquid crystal display device of 3D-LCD or 2-screen LCD have been described. However, in a display device including a pair of substrates arranged to face each other, the same applies when one substrate is thin. Challenges can arise. Furthermore, when the substrates having different substrate strengths are arranged to face each other, the same problem can occur.

  The present invention has been made in view of the above background, and an object of the present invention is to provide a display device that is resistant to shock and vibration and has high reliability.

  A display device according to a first aspect of the present invention includes a first substrate, a second substrate having a contact strength lower than that of the first substrate, and the display element sandwiched between the first substrate and the second substrate. The second substrate is disposed so as to be inside from the first substrate in a plan view.

  A display device according to a second aspect of the present invention includes a first substrate, a second substrate having a lower contact strength than the first substrate, and the display element sandwiched between the first substrate and the second substrate. A display panel is provided. A sealing material having an injection port for injecting the display element is formed in a peripheral region of a gap between the first substrate and the second substrate. The second substrate is disposed so as to be more inward in plan view than the first substrate except for the side where the injection port is formed, and the side where the injection port is formed is the first side. The end face of one substrate and the end face of the second substrate are disposed so as to be substantially at the same position in plan view. Moreover, it seals using the injection hole sealing material over the edge | side in which the said injection hole was formed from the said injection hole.

  According to the present invention, there is an excellent effect that it is possible to provide a highly reliable display device that is resistant to impact and vibration.

1 is a schematic plan view of a liquid crystal display panel of a first embodiment. IB-IB cutting part sectional drawing of FIG. The typical sectional view of the liquid crystal display panel of a 2nd embodiment. The top view of the liquid crystal display device of 3rd Embodiment. The top view of the liquid crystal display device of 4th Embodiment. The top view of the liquid crystal display device of 5th Embodiment.

  Hereinafter, an example of an embodiment to which a display device according to the present invention is applied will be described. The following drawings are schematic, and the size and ratio of each component are for convenience of explanation and are different from actual ones. Also, the display pixel pattern and the film configuration are not shown.

[First Embodiment]
FIG. 1A is a schematic diagram for explaining an example of a liquid crystal panel mounted on the liquid crystal display device according to the first embodiment of the present invention. More specifically, FIG. 1A is a schematic diagram showing the entire liquid crystal panel and the parallax barrier. It is a top view. 1B is a cross-sectional view taken along line IB-IB in FIG. 1A. In the first embodiment, an active matrix type liquid crystal display device that operates using a TFT (Thin Film Transistor) as a switching element will be described.

  As shown in FIGS. 1A and 1B, the liquid crystal panel 100 is an array substrate 1 that is a first substrate on which switching elements are disposed, and a second substrate that is disposed opposite to the array substrate 1 and has a display surface that displays an image. A color filter substrate 2 is provided. The liquid crystal panel 100 is disposed so as to surround a region corresponding to the display surface between the array substrate 1 and the color filter substrate 2, and a sealing material 5 made of a resin for bonding the two substrates together, and the sealing material 5. A liquid crystal 4 serving as a display element is provided which is enclosed and sealed in a region corresponding to the display surface between the array substrate 1 and the color filter substrate 2.

  In a region corresponding to the display surface of the array substrate 1, on one surface of a glass substrate which is a transparent substrate, an alignment film for aligning liquid crystal, and a pixel electrode which is provided below the alignment film and applies a voltage for driving the liquid crystal Have In addition, a switching element such as a TFT that supplies a voltage to the pixel electrode, an insulating film that covers the switching element, a gate wiring that is a wiring for supplying a signal to the switching element, a source wiring, and the like are also provided.

  Outside the region corresponding to the display surface of the array substrate 1, a terminal 8 that receives a signal supplied to the switching element from the outside, a transfer electrode (not shown) for transmitting the signal input from the terminal 8 to the counter electrode, etc. Is provided. A first polarizing plate 6 is disposed on the outer main surface of the array substrate 1. The first polarizing plate 6 having a size substantially the same as that of the array substrate 1 is arranged so as to overlap the array substrate 1.

  The color filter substrate 2 is arranged on one surface of a glass substrate which is a transparent substrate, and is disposed under the alignment film, and drives the liquid crystal by generating an electric field between the pixel electrodes on the array substrate. A common electrode, a color filter provided under the common electrode, a light shielding layer, and the like. Furthermore, a parallax barrier 3 made of a stripe-shaped light shielding film is formed on the other main surface of the color filter substrate 2, and a second polarizing plate 7 is disposed outside the parallax barrier 3. The second polarizing plate 7 is disposed so that the same size as the color filter substrate overlaps the color filter substrate 2.

  The array substrate 1 and the color filter substrate 2 are bonded to each other via a sealant 5 and a spacer (not shown) that keeps the distance between the substrates constant. As the spacer, a granular spacer dispersed on the substrate may be used, or a columnar spacer formed by patterning a resin on any one of the substrates may be used. Furthermore, the transfer electrode and the common electrode are electrically connected by a transfer material (not shown), and a signal input from the terminal is transmitted to the common electrode. In addition to the above-described components, the liquid crystal panel 100 includes a control board equipped with a driving IC (Integrated Circuit) that generates a driving signal, an FFC (Flexible Flat Cable) that electrically connects the control board to a terminal, and the like. To do.

  In the liquid crystal display device, the liquid crystal panel 100 configured as described above, a backlight unit serving as a light source, and the like are housed in a housing. The backlight unit is usually disposed on the opposite side of the display surface. The display surface of the liquid crystal panel 100 is accommodated so as to be visible from within the housing.

  Next, the operation of the liquid crystal display device including the liquid crystal panel 100 will be described. When an electric signal is input from a control substrate (not shown), a driving voltage is applied to the pixel electrode and the common electrode, and the direction of liquid crystal molecules changes according to the driving voltage. Then, the light emitted from the backlight unit is transmitted or blocked to the viewer side through the array substrate 1, the liquid crystal 4 and the color filter substrate 2, whereby an image or the like is displayed on the display surface of the liquid crystal panel 100.

  The liquid crystal panel 100 is an example and may have other configurations. The operation mode of the liquid crystal panel 100 may be a TN (Twisted Nematic) mode, an STN (Super Twisted Nematic) mode, a VA (Vertically Aligned) mode, a ferroelectric liquid crystal mode, or the like. The driving method may be a simple matrix instead of the active matrix. In addition, a common electrode provided on the color filter substrate 2 is installed on the switching element substrate side, and an IPS (In-Plane Swithcing) using a lateral electric field method in which an electric field is applied to the liquid crystal in the lateral direction between the pixel electrodes. A mode LCD panel may be used.

  Furthermore, the transfer material can be omitted by mixing conductive particles or the like in the seal material 5 and causing the seal material to function as the transfer material. Further, although the example in which the driving IC is connected to the terminal 8 in a state of being placed on the control board has been described, the terminal of the driving IC may be disposed on the terminal 8 so as to be in contact therewith.

  Next, a method for manufacturing the liquid crystal panel 100 according to the first embodiment will be described. The manufacturing method of the array substrate 1 and the color filter substrate 2 will be briefly described because a general method is used.

  The array substrate 1 is manufactured by forming switching elements, pixel electrodes, terminals 8, and transfer electrodes on one surface of a glass substrate by repeatedly using a pattern forming process such as film formation, patterning by photolithography, and etching. Is done. The color filter substrate 2 is manufactured by forming a color filter or a common electrode on one surface of a glass substrate.

  Next, a process until the array substrate 1 and the color filter substrate 2 are bonded together will be described. First, in the substrate cleaning process, the array substrate 1 on which the pixel electrodes are formed is cleaned. Next, in the alignment film material application process, an organic film made of polyimide, which is a material of the alignment film, is applied to one surface of the array substrate 1 by, for example, a printing method, and is baked by a hot plate or the like and dried. Thereafter, an alignment process is performed on the array substrate 1 coated with the alignment film material to form an alignment film. The alignment film is also formed on the color filter substrate 2 on which the common electrode is formed by washing, applying an organic film, and alignment treatment. Subsequently, in a sealing material application process for forming a sealing material, a resin to be the sealing material 5 is applied to one surface of the array substrate 1 or the color filter substrate 2. Further, for the sealing material 5, for example, a thermosetting resin such as an epoxy adhesive or an ultraviolet curable resin is used.

  The array substrate 1 and the color filter substrate 2 manufactured through the above steps are arranged so as to face each other, and the pixels of the panel formed on each substrate are aligned and bonded so as to correspond to each other. The sealing material 5 is cured on the array substrate 1 and the color filter substrate 2 bonded together as described above. This step is performed, for example, by applying heat according to the material of the sealing material 5 or irradiating ultraviolet rays.

  Subsequently, characteristic steps in the first embodiment will be described. First, a thinning polishing process for cutting the color filter substrate 2 is performed so that 3D display or two-screen display is possible. This step is performed, for example, by scraping the surface of the glass substrate 2 by chemical polishing using a chemical solution or physical polishing rubbing with a polishing material. In the first embodiment, the thickness of the color filter substrate 2 is set to 0.1 mm by chemical polishing using a chemical solution. Next, a parallax barrier 3 made of a striped light shielding film is formed on the outer surface of the thin color filter substrate 2. As the light-shielding film material, a resin mixed with metal or carbon black is used, and the light-shielding film material is manufactured by a pattern formation process such as film formation, patterning by photolithography, and etching.

  Next, in the cell dividing step, the bonded substrates are divided into individual cells corresponding to the individual liquid crystal panels 100. The conventional liquid crystal display panel is not limited to the liquid crystal display panel 100 used in a 3D video display device or a two-screen liquid crystal display device. The outer shape of the color filter substrate 2 is the same. In contrast, in the liquid crystal display panel 100 of the first embodiment, the end face of the color filter substrate is disposed so as to be inside the end face of the array substrate 1. In other words, the size of the array substrate 1 is made larger than the size of the color filter substrate 2, and the array substrate 1 is disposed so as to protrude on all sides from the color filter substrate 2 in plan view.

  By disposing the end face of the color filter substrate 2 so as to be inside the end face of the array substrate 1, a color filter substrate having a thin glass substrate even if the end face of the liquid crystal panel 100 contacts other objects. 2 will not be in direct contact with other objects. Therefore, the thin color filter substrate 2 can be prevented from cracking or cracking. As a result, the reliability of the liquid crystal panel can be improved. Further, it is possible to prevent the color filter substrate 2 from being damaged during the manufacturing process such as the assembly process of the liquid crystal display device, and to increase the yield.

  After the cell dividing step, a liquid crystal injection step for injecting liquid crystal from a liquid crystal injection port in vacuum is provided. Further, in the sealing step, the liquid crystal injection port is sealed by, for example, applying a photocurable resin to the liquid crystal injection port portion and irradiating light.

  Subsequently, in the polarizing plate attaching step, the polarizing plate is attached outside the array substrate 1 and the color filter substrate 2. Subsequently, in the control board mounting process, the liquid crystal panel 100 is completed by mounting the control board. Finally, a liquid crystal display device capable of 3D display and two-screen display is completed by incorporating and holding the liquid crystal panel 100 and the backlight unit in the housing.

  According to the liquid crystal display device according to the first embodiment, even if another object contacts the end surface of the liquid crystal panel 100, the object directly contacts the end surface of the thin glass substrate constituting the color filter substrate 2. There is no longer to do. As a result, it is possible to effectively prevent the thin glass substrate constituting the color filter substrate 2 from being damaged.

  In a conventional liquid crystal display device, when the liquid crystal panel 100 is incorporated in a module, if vibration or impact is applied, the end face of the liquid crystal panel comes into contact with a frame or the like, and the thinned glass is cracked. On the other hand, according to the liquid crystal display device according to the first embodiment, even if vibration or impact is applied to the liquid crystal display device, the end face of the thinned glass substrate in the liquid crystal panel is close to a frame or the like that accommodates the liquid crystal panel. Does not contact the member. As a result, it is possible to effectively prevent the thin glass substrate constituting the color filter substrate 2 from being damaged.

  In addition, the liquid crystal display device according to the first embodiment has an excellent merit that the processing steps do not increase and the cost does not increase.

  Further, according to the liquid crystal display device according to the first embodiment, the second polarizing plate 7 is made substantially the same size as the color filter substrate 2, and the second polarizing plate 7 is disposed so as to overlap in plan view. Therefore, an object from the outside does not directly contact the second polarizing plate 7, and problems such as peeling can be prevented.

  Although the parallax barrier 3 is provided on the observer side of the color filter substrate 2 in the first embodiment, the array substrate 1 may be thinned and the parallax barrier may be provided on the counter-observer side of the array substrate 1. .

[Second Embodiment]
Next, an example of a liquid crystal display device different from the above embodiment will be described. In the following description, the same reference numerals are assigned to the same element members as those in the above embodiment, and the description thereof is omitted as appropriate.

  The liquid crystal display device according to the second embodiment has the same basic structure and manufacturing method as those of the first embodiment except for the following points. That is, the second embodiment is different from the first embodiment in that the size of the second polarizing plate is larger in plan view than the color filter substrate.

  FIG. 2 shows a cross-sectional view of the liquid crystal panel according to the second embodiment. The size of the second polarizing plate 7 a according to the second embodiment is larger than the size of the color filter substrate 2. In plan view, the second polarizing plate 7 a protrudes outward on all sides from the color filter substrate 2. However, in plan view, the second polarizing plate 7 a is disposed so as to be inside on all sides of the array substrate 1.

  According to the second embodiment, the same effect as in the first embodiment can be obtained by configuring the color filter substrate 2 and the second polarizing plate 7a as described above. In addition, even when an object comes into contact with the liquid crystal panel 100a from an obliquely upward direction, a portion protruding outward from the color filter substrate 2 in the second polarizing plate 7a comes into contact with the color filter in which the object is directly reduced in thickness. It does not contact the substrate 2. Therefore, the projecting portion of the second polarizing plate 7a exhibits a buffering action, and the glass substrate can be prevented from cracking even when contacted obliquely from above. Further, since the second polarizing plate 7a disposed on the color filter substrate 2 is located on the inner side than the array substrate 1, the second polarizing plate 7a can be made difficult to directly contact with an object, such as peeling. Problems can be prevented.

[Third embodiment]
The liquid crystal display device according to the third embodiment has the same basic structure and manufacturing method as the first embodiment except for the following points. That is, the third embodiment is different from the first embodiment in which a dropping injection method is adopted and a method in which liquid crystal is injected in a vacuum. Moreover, the arrangement | positioning position of a terminal differs from 1st Embodiment.

  FIG. 3 is a cross-sectional view of a liquid crystal panel according to the third embodiment. In the liquid crystal panel 100b according to the third embodiment, the terminal 8b is disposed in the vicinity of one short side of the array substrate 1b. Further, the liquid crystal display panel 100b is formed with a closed loop-shaped sealing material 5b in which no sealing port is provided in the sealing material 5b by a so-called dropping injection method.

  The thin color filter substrate 2b is arranged so as to be inward in a plan view with respect to the outer shape of the array substrate 1b formed of a thick glass substrate on all four sides. In other words, the array substrate 1b is disposed so as to protrude from the color filter substrate 2b in plan view.

  According to the liquid crystal panel according to the third embodiment, the same effects as those of the first embodiment can be obtained. In addition, since the liquid crystal panel according to the third embodiment employs the dropping injection method, it is possible to more effectively prevent the occurrence of liquid crystal injection failure and sealing failure as compared with the first embodiment. Can do.

[Fourth embodiment]
The liquid crystal display device according to the fourth embodiment has the same basic structure and manufacturing method as the first embodiment except for the following features. The fourth embodiment is that the inlet sealing material is sealed not only over the liquid crystal inlet but also over the entire side wall of one side of the color filter substrate and the array substrate provided with the liquid crystal inlet. There are features. In addition, the fourth embodiment is characterized in that two substrates are cut at the same position on the sides of the array substrate provided with the liquid crystal injection port and the color filter substrate in plan view.

  FIG. 4 shows a cross-sectional view of a liquid crystal panel according to the fourth embodiment. The liquid crystal panel 100c according to the fourth embodiment is sealed with an inlet sealing material 9 from the liquid crystal inlet 10 to the entire end surface of the side where the liquid crystal inlet 10 is provided.

  According to the fourth embodiment, the color filter substrate 2c is arranged on the inner side of the array substrate 1c in plan view on three sides other than the liquid crystal injection port 10 provided. Therefore, the same effect as that of the first embodiment can be obtained on the three sides.

  Further, according to the fourth embodiment, one side where the liquid crystal injection port 10 is provided is sealed by the injection port sealing material 9 over substantially the entire region of the side. Therefore, the thin glass end face can be reinforced on one side where the liquid crystal injection port 10 is provided. Therefore, even if an object contacts the end surface of the side, it is possible to effectively prevent the thinned glass end surface from being broken and broken.

  Further, according to the fourth embodiment, one side provided with the liquid crystal injection port 10 is cut so that the array substrate 1 and the color filter substrate 2 are substantially at the same position in plan view. Compared with the first embodiment, it is possible to more effectively prevent the occurrence of liquid crystal injection failure and sealing failure.

[Fifth Embodiment]
FIG. 5 shows a cross-sectional view of a liquid crystal panel according to the fifth embodiment. The liquid crystal panel 200 according to the fifth embodiment includes a first liquid crystal panel 20 and a second liquid crystal panel 30 that is a parallax barrier forming liquid crystal panel. The first liquid crystal panel 20 includes an array substrate 11, a color filter substrate 12, an image display liquid crystal 14, a sealing material 15, a first polarizing plate 16, and the like. The liquid crystal panel 20 includes a color filter substrate 12, a parallax barrier display liquid crystal 13, a sealing material 15, a second polarizing plate 17, a parallax barrier display substrate 18, and the like. The color filter substrate 12 is used as a common substrate in the first liquid crystal panel 20 and the second liquid crystal panel 30. In the first liquid crystal panel 20 and the second liquid crystal panel 20, a pair of polarizing plates is provided.

  The parallax barrier display liquid crystal 13 sandwiched between the color filter substrate 12 and the parallax barrier display substrate 18 is provided instead of the striped light shielding film, and forms a striped black image.

  According to the liquid crystal display device according to the fifth embodiment, the color filter substrate 12 is made smaller than the outer size of the array substrate 11 and the parallax barrier display substrate 18, and the color filter substrate 12 is arranged in the plan view. Since it is arranged inside the display substrate 18, the same effect as in the first embodiment can be obtained.

  Further, with the above configuration, even when an object comes in contact with the liquid crystal panel 200 obliquely from above, the object does not directly contact the thin glass substrate constituting the color filter substrate 12. As a result, the glass can be prevented from cracking or cracking. In the fifth embodiment, an example is described in which one thin glass substrate constituting the color filter substrate 12 is used. However, two thin glass substrates may be bonded together.

  In addition, this invention is not limited to the said embodiment, It can change suitably in the range which does not deviate from the meaning of this invention. In the above embodiment, the liquid crystal display device for 3D-LCD or two-screen LCD has been described, but the present invention can be applied to all liquid crystal display devices. The present invention can be applied not only to liquid crystal display devices but also to flat display devices (flat panel displays) such as organic EL display devices in general.

  Moreover, in the said embodiment, although the example of the array board | substrate was given as an example of a color filter board | substrate as a 2nd board | substrate as an example of an array board | substrate as a 1st board | substrate, it is not limited to this. Moreover, although the example which uses glass was given as a board | substrate which comprises a 1st board | substrate and a 2nd board | substrate, it is not limited to this, This invention is applicable also to materials, such as a plastics. Further, as an example in which the second substrate is weaker than the first substrate, an example in which the thickness of the second substrate is thin is given, but the present invention is not limited to this. For example, the present invention can be suitably applied even when the contact strength (strength when contacted with an external object or the like) is lower in the second substrate than in the first substrate due to the characteristics of the material. In the above embodiment, the example in which the terminal 8 is provided only in the vicinity of one side of the array substrate 1 has been described. However, the terminal 8 may be provided over two sides. Moreover, you may provide components other than the said embodiment in an array substrate edge part.

DESCRIPTION OF SYMBOLS 1, 11 Array substrate 2, 12 Color filter substrate 3 Parallax barrier 4 Liquid crystal 5, 15 Sealing material 6, 16 First polarizing plate 7, 17 Second polarizing plate 8 Terminal 9 Inlet sealing material 10 Liquid crystal inlet 13 Parallax barrier Display liquid crystal 14 Image display liquid crystal 18 Parallax barrier display substrate 20 First liquid crystal panel 30 Second liquid crystal panel 100, 200 Liquid crystal display panel

Claims (8)

A first substrate;
A second substrate having a lower contact strength than the first substrate;
A display panel comprising a display element sandwiched between the first substrate and the second substrate;
The display device, wherein the second substrate is disposed on the inner side in plan view than the first substrate.   The display device according to claim 1, wherein a glass substrate having a thickness smaller than that of the first substrate is used for the second substrate. The display panel is a liquid crystal display panel, and a polarizing plate is disposed on outer main surfaces of the first substrate and the second substrate,
The polarizing plate on the outer principal surface of the second substrate is disposed so as to protrude outward from the second substrate in a plan view, and disposed so as to be inside the first substrate. The display device according to claim 1 or 2.   The display device according to claim 1, wherein a sealing material having a closed loop shape is formed in a peripheral region of a gap between the first substrate and the second substrate. A parallax barrier forming liquid crystal panel capable of forming a parallax barrier is installed on the second substrate,
Of the substrates constituting the parallax barrier forming liquid crystal panel, a substrate disposed at a position spaced apart from the display panel has a higher contact strength than the second substrate, and is disposed outside in plan view. The display device according to claim 1, wherein the display device is a display device. A first substrate;
A second substrate having a lower contact strength than the first substrate;
A display panel comprising a display element sandwiched between the first substrate and the second substrate;
A sealing material having an injection port for injecting the display element is formed in a peripheral region of a gap between the first substrate and the second substrate;
The second substrate is disposed so as to be on the inner side in plan view than the first substrate except for the side where the injection port is formed, and
The side where the injection port is formed is arranged such that the end surface of the first substrate and the end surface of the second substrate are substantially at the same position in plan view,
A display device that is sealed from the injection port using an injection port sealing material over a side where the injection port is formed.   The display device according to claim 6, wherein the second substrate is glass having a thickness smaller than that of the first substrate. The display panel is a liquid crystal display panel, and a polarizing plate is disposed on outer main surfaces of the first substrate and the second substrate,
The polarizing plate on the outer principal surface of the second substrate is disposed so as to protrude outward from the second substrate in a plan view, and is disposed so as to be inside the first substrate. The display device according to claim 6 or 7.

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