JP6361236B2 - ELECTRO-OPTICAL MODULE, ITS MANUFACTURING METHOD, AND ELECTRONIC DEVICE - Google Patents

Description

The present invention relates to an electro-optical module in which an electro-optical panel is bonded to a plate, a manufacturing method thereof, and an electronic apparatus including the electro-optical module.

When an image is displayed on an electronic device such as a projection display device, light modulated by an electro-optical panel such as a liquid crystal panel is used. Such an electro-optical panel is mounted on an electronic device in a state of being fixed to a support member such as a plate or a holder by an adhesive (Patent Documents 1 and 2).
For example, in the configuration described in Patent Document 1, after the electro-optical panel and the support member are fixed with a UV curable adhesive in a total of four locations on three sides excluding the side to which the flexible wiring board is connected in the electro-optical panel, A configuration in which an elastic resin is filled between the electro-optical panel and the support member has been proposed. In the configuration described in Patent Document 2, the electro-optic panel and the support member are fixed by a silicone-based elastic adhesive provided along two opposite sides of the electro-optic panel.

JP 9-325323 A Japanese Patent Laid-Open No. 10-123487

In the configuration described in Patent Document 2, since the electro-optical panel and the support member are fixed only by the elastic adhesive, there is a problem that the fixing strength of the electro-optical panel is low. On the contrary,
In the configuration described in Patent Document 1, since the elastic resin is provided after the electro-optical panel and the support member are fixed with the UV curable adhesive, the fixing strength between the electro-optical panel and the support member is large.

However, in the configuration described in Patent Document 1, the three sides of the electro-optical panel and the support member are U
Since it is fixed by the V curable adhesive, when the temperature of the electro-optical panel rises or when an external force is applied, the stress received from the fixing position by the UV curable adhesive is biased, and the electro-optical panel is There is a problem of deformation. Such deformation of the electro-optical panel is not preferable because it causes a reduction in display quality.

In view of the above problems, an object of the present invention is to provide an electro-optic module in which stress applied to the electro-optic panel is not easily biased even when the electro-optic panel is securely fixed to the plate with an adhesive.
An object of the present invention is to provide a manufacturing method thereof and an electronic apparatus including the electro-optic module.

In order to solve the above problems, an electro-optic module according to the present invention includes an electro-optic panel,
A support member, a UV curable adhesive for bonding the end of the electro-optical panel and the support member, and an end of the electro-optical panel and the support member in a wider range than the UV curable adhesive The UV curable adhesive is provided at four points symmetrical with respect to the center of the electro-optical panel.

In the present invention, since the electro-optical panel and the support member are fixed by the UV curable adhesive and the elastic adhesive, the electro-optical panel and the support member can be reliably fixed. Here, since the UV curable adhesive is provided at four points symmetrical with respect to the center of the electro-optical panel, when the electro-optical panel rises in temperature or receives an external force, the UV curable adhesive is cured. The stress applied to the electro-optical panel from the position fixed by the adhesive is dispersed and is not easily biased. The elastic adhesive bonds the end portion of the electro-optical panel and the support member in a wider range than the UV curable adhesive. However, since the elastic adhesive has elasticity, the electro-optical panel Even when the temperature rises or when an external force is applied, the electro-optical panel is hardly stressed. Therefore, it is difficult for the electro-optical panel to be deformed.

  In the present invention, the electro-optical panel has, for example, a rectangular planar shape.

In the present invention, the UV curable adhesive may employ a configuration provided on each of two opposing sides in the quadrangle.

In this case, the elastic adhesive may be configured to extend along two sides adjacent to the two sides in the quadrangle.

In the present invention, the elastic adhesive may adopt a configuration provided at each of the four corners of the square.

In the present invention, the electro-optical panel has a rectangular planar shape, and a flexible wiring board is connected to one of the two long sides facing each other, and the UV is connected to the electro-optical panel. It is preferable that the curable adhesive is provided at two positions on the one long side to sandwich the connection position of the flexible wiring board from both sides.

In the present invention, the support member is formed with a panel arrangement hole in which the electro-optic panel is arranged on the inner side, and at least an end portion of the electro-optic panel and an inner peripheral surface of the panel arrangement hole are formed on the support member. A configuration in which the adhesive is bonded by a UV curable adhesive and the elastic adhesive can be employed.

In this case, the support member includes a bottom plate portion that protrudes inside the panel arrangement hole and overlaps the electro-optic panel, and the bottom plate portion projects toward the electro-optic panel to support the electro-optic panel. It is preferable that the plurality of panel support portions are respectively formed at spaced positions. According to such a configuration, even when the electro-optical panel is deformed by applying stress, the electro-optical panel is held in an appropriate posture by the plurality of panel support portions.

In the present invention, it is preferable that the plurality of panel support portions are provided at a total of four points that are point-symmetric with respect to the center of the electro-optical panel.

In the present invention, the electro-optical panel is a liquid crystal panel, and in this case, the liquid crystal panel is
Of the first substrate on which the pixel electrode is formed, the second substrate that is bonded to the first substrate with a sealant, and on which the common electrode is formed, and the seal between the first substrate and the second substrate. A liquid crystal layer provided in a space surrounded by the material, and an end portion of the electro-optical panel is configured by an end portion of the first substrate.

The present invention is effective when the pixel electrode is formed of a reflective electrode, that is, when the electro-optical panel is a reflective liquid crystal panel. In the case of a reflective liquid crystal panel, the display quality is more likely to deteriorate due to deformation than the reflective liquid crystal panel. However, according to the present invention, the occurrence of such deterioration in display quality can be suppressed.

According to another aspect of the invention, there is provided a method of manufacturing an electro-optical module in which an electro-optical panel is bonded to a support member, and the end of the electro-optical panel and the end at four points symmetrical with respect to the center of the electro-optical panel. A first bonding step of bonding the support member to the support member with a UV curable adhesive; and an elastic adhesive having elasticity after curing the end portion of the electro-optic panel and the support member in a wider range than the UV curable adhesive. And a second bonding step of bonding by.

In the present invention, since the electro-optical panel and the support member are fixed by the UV curable adhesive and the elastic adhesive, the electro-optical panel and the support member can be reliably fixed. Here, since the UV curable adhesive is provided at four points symmetrical with respect to the center of the electro-optical panel, when the electro-optical panel rises in temperature or receives an external force, the UV curable adhesive is cured. The stress received from the fixing position by the adhesive is dispersed and is not easily biased. Therefore, it is difficult for the electro-optical panel to be deformed. Further, in the present invention, after fixing the electro-optical panel and the support member with the UV curable adhesive, since the elastic adhesive is provided, until the elastic adhesive is cured,
The operation | work etc. for preventing the position shift with an electro-optical panel and a supporting member are unnecessary. For this reason, the productivity of the electro-optic module can be increased.

In the present invention, in the first bonding step, a first application step of applying the UV curable adhesive to a part of the four parts, and the UV curable agent applied to the part of the parts. A first curing step of irradiating the adhesive with UV light to cure the UV curable adhesive; a second coating step of applying the UV curable adhesive to other portions of the four locations; The UV curable adhesive applied to other locations is irradiated with UV light to cure the UV curable adhesive.
It is preferable to perform a curing step. According to such a configuration, since the UV curable adhesive is cured immediately after being applied, it is difficult for the UV curable adhesive before curing to flow to an unnecessary part.

In the present invention, in the first bonding step, the UV curable adhesive is simultaneously applied to all four locations, and the UV curable adhesive applied to the four locations is simultaneously irradiated with UV light. And a curing step of curing the UV curable adhesive. According to such a configuration, it is possible to apply the UV curable adhesive to four locations and cure the four UV curable adhesives in a short time. Moreover, since it hardens | cures immediately after apply | coating a UV curable adhesive, it is hard to flow to the location where the UV curable adhesive before hardening is unnecessary.

The electro-optic module according to the present invention can be used in various electronic devices. When the projection display device is configured as an electronic device, the electronic device includes a light source unit that emits light supplied to the electro-optical panel, and a projection optical system that projects light modulated by the electro-optical panel. ,have. In the case of a projection display device, the result is that strong light is supplied to the electro-optical panel,
Although the temperature rise of the electro-optic module is large, even if such a temperature change occurs, according to the present invention, it is difficult for biased stress to be applied to the electro-optic panel.

It is explanatory drawing of the electro-optical panel used for the electro-optical module which concerns on Embodiment 1 of this invention. It is explanatory drawing of the electro-optic module which concerns on Embodiment 1 of this invention. 1 is an exploded perspective view of an electro-optic module according to Embodiment 1 of the present invention. It is explanatory drawing which shows the fixing structure of the electro-optic panel to the plate in the electro-optic module which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the fixing process of the electro-optical panel to the plate in the electro-optical module which concerns on Embodiment 1 of this invention. In the electro-optic module which concerns on Embodiment 1 of this invention, it is explanatory drawing of the 1st adhesion process which adhere | attaches the plate 2 and the electro-optic panel with UV curable adhesive. It is a top view which shows the fixation structure of the electro-optical panel to the plate in the electro-optical module which concerns on Embodiment 2 of this invention. It is a top view which shows the fixing structure etc. of the electro-optical panel to the plate in the electro-optical module which concerns on Embodiment 3 of this invention. FIG. 10 is a plan view showing a structure for fixing an electro-optical panel to a plate in an electro-optical module according to Embodiment 4 of the present invention. It is a schematic block diagram of an example of the projection type display apparatus (electronic device) to which this invention is applied.

Embodiments of the present invention will be described with reference to the drawings. In the following description, the case where the electro-optical module to which the present invention is applied has a reflective liquid crystal panel as the electro-optical panel will be mainly described. In the drawings referred to in the following description, the scales are different for each layer and each member so that each layer and each member have a size that can be recognized on the drawing. In the following description, the directions perpendicular to each other in the in-plane direction of the electro-optical panel 40 are defined as the X direction and the Y direction, and the normal direction to the electro-optical panel 40 is defined as the Z direction. In the Z direction, the light emission side (front surface side) is set as one side Z1, and the side opposite to the light emission side (back surface side) is set as the other side Z2.
It is as.

[Embodiment 1]
(Configuration of electro-optic panel)
FIG. 1 is an explanatory diagram of an electro-optical panel 40 used in the electro-optical module 100 according to Embodiment 1 of the present invention. FIGS. 1 (a) and 1 (b) each show the electro-optical panel 40 as each component. A plan view seen from the second substrate (counter substrate) side, and a cross-sectional view thereof taken along the line H-H '. Note that. In FIG. 1A, illustration of the dustproof glass 57 is omitted.

As shown in FIG. 1, the electro-optical panel 40 includes a first substrate 51 (element substrate) and a second substrate 52.
(Opposite substrate) is bonded to each other with a sealant 407 through a predetermined gap. First
The substrate 51 and the second substrate 52 are translucent substrates such as a quartz substrate and a glass substrate. In this embodiment, quartz substrates are used for the first substrate 51 and the second substrate 52. In this embodiment, the electro-optical panel 40 is a liquid crystal panel, and a liquid crystal layer as an electro-optical layer 450 is held in a region surrounded by the sealing material 407 between the first substrate 51 and the second substrate 52. . The sealing material 407 is provided in a frame shape along the outer edge of the second substrate 52. The sealing material 407 is a photo-curing adhesive, a thermosetting adhesive, or an adhesive having both photo-curing and thermosetting, and the distance between the two substrates is set to a predetermined value. Gap materials such as glass fiber or glass beads are blended.

In this embodiment, the first substrate 51 has a quadrangular planar shape, and includes end faces 511, 512, 513, and 514 on each of the four sides. Similarly to the first substrate 51, the second substrate 52 has a quadrangular shape and includes end faces 521, 522, 523, and 524 on each of the four sides.
The first substrate 51 is larger in size than the second substrate 52 and has four end surfaces 511, 5 of the first substrate 51.
12, 513, and 514 are located outside the end surfaces 521, 522, 523, and 524 of the second substrate 52.

For this reason, the electro-optical panel 40 of this embodiment has a rectangular planar shape, and the end of the electro-optical panel 40 is configured by the end surfaces 511, 512, 513, and 514 of the first substrate 51. Further, the first substrate 51 has a long rectangular planar shape, and therefore, the electro-optical panel 40 also has a long rectangular planar shape. In addition, the two electro-optical panels 40 facing each other
The two long side ends are formed by the end surfaces 513 and 514 of the first substrate 51, and the two opposite short side ends of the electro-optical panel 40 are the end surfaces 511 and 512 of the first substrate 51. It is configured.

A display area 40 a that emits modulated light is provided as a rectangular area in a substantially central area of the electro-optical panel 40. Corresponding to this shape, the sealing material 407 is also provided in a substantially square shape. In the electro-optical panel 40, the end of the display area 40a and the end surface of the electro-optical panel 40 (
Between the end surfaces 511, 512, 513, and 514) of the first substrate 51, a rectangular frame-shaped peripheral region 40c is provided.

In the first substrate 51, the end portion on the side where the end surface 514 is located (the end portion on the one side Y1 in the Y-axis direction) protrudes more greatly from the end surface 524 of the second substrate 52 than the other end portion, and the protruding portion 5
In FIG. 19, a data line driving circuit 401 and a plurality of terminals 402 are formed along the end face 514. Further, the scanning line driving circuit 404 is provided on the first substrate 51 along the end faces 511 and 512.
Is formed. A flexible wiring board 40 i is connected to the terminal 402, and various potentials and various signals are input to the first board 51 through the flexible wiring board 40 i.

Of the first surface 51 a and the second surface 51 b of the first substrate 51, the first facing the second substrate 52.
On the surface 51a, pixel electrodes 405a and pixel transistors (switching elements / not shown) corresponding to the pixel electrodes 405a are formed in a matrix in the display region 40a.
An alignment film 416 is formed on the upper layer side of the pixel electrode 405a. The first substrate 5
In one first surface 51a, a dummy pixel electrode 405b that is formed simultaneously with the pixel electrode 405a is formed in a region inside the sealing material 407 in the peripheral region 40c.

Of the first surface 52 a and the second surface 52 b of the second substrate 52, the first facing the first substrate 51.
A translucent common electrode 421 is formed on the surface 52 a, and an alignment film 426 is formed on the common electrode 421. The alignment films 416 and 426 are made of polyimide or an inorganic alignment film. In this embodiment, the alignment films 416 and 426 are made of, for example, SiO _x (x <2), SiO ₂ , T
It consists of an obliquely deposited film (inorganic alignment film) such as iO ₂ , MgO, Al ₂ O ₃ , In ₂ O ₃ , Sb ₂ O ₃ , Ta ₂ O _5, etc. The negative nematic liquid crystal compound is tilted vertically aligned. Therefore, the electro-optical panel 40 operates in a normally black VA mode.

The common electrode 421 is formed across a plurality of pixels as a substantially entire surface of the second substrate 52 or as a plurality of strip-like electrodes. In this embodiment, the common electrode 421 is formed over a substantially entire surface of the second substrate 52. . On the first surface 52 a of the second substrate 52, the light shielding layer 40 is disposed below the common electrode 421.
8 is formed. The light shielding layer 408 is formed in a frame shape extending along the outer peripheral edge of the display area 40 a, and the display area 40 a is defined by the inner edge of the light shielding layer 408. The outer peripheral edge of the light shielding layer 408 is at a position with a gap between the inner peripheral edge of the sealing material 407 and
The light shielding layer 408 and the sealing material 407 are not covered. In the second substrate 52, a light shielding layer formed simultaneously with the light shielding layer 408 may be formed as a black matrix or a black stripe in a region overlapping with a region sandwiched between adjacent pixel electrodes 405a.

In the first substrate 51, an inter-substrate conduction electrode for electrically conducting between the first substrate 51 and the second substrate 52 in a region overlapping the corner portion of the second substrate 52 outside the sealing material 407. 4
09 is formed. An inter-substrate conductive material 409a containing conductive particles is disposed between the inter-substrate conductive electrode 409 and the second substrate 52, and the common electrode 421 of the second substrate 52 includes the inter-substrate conductive material 409a and the substrate. It is electrically connected to the first substrate 51 side via the inter-connection electrode 409. For this reason, a common potential is applied to the common electrode 421 from the first substrate 51 side. The sealing material 407 is provided along the outer peripheral edge of the second substrate 52 with substantially the same width dimension. However, the sealing material 407 is provided so as to pass through the inside avoiding the inter-substrate conduction electrode 409 in a region overlapping the corner portion of the second substrate 52.

The electro-optical panel 40 having such a configuration is configured as a transmissive liquid crystal panel or a reflective liquid crystal panel. When the electro-optical panel 40 is a transmissive liquid crystal panel, a transparent substrate such as a quartz substrate is used for both the first substrate 51 and the second substrate 52. When the electro-optical panel 40 is a transmissive liquid crystal panel, the pixel electrode 405a and the common electrode 421 are made of ITO.
A light-transmitting conductive film such as an (Indium Tin Oxide) film or an IZO (Indium Zinc Oxide) film is used. In such a transmissive liquid crystal panel (electro-optical panel 40), for example, light incident from the second substrate 52 side is modulated while being emitted from the first substrate 51 side, and an image is displayed.

When the electro-optical panel 40 is a reflective liquid crystal panel, the common electrode 421 is formed of an ITO film or I
The pixel electrode 405a is formed of a reflective conductive film (reflective electrode) such as an aluminum film. Such a reflective liquid crystal panel (electro-optical panel 4
0), as indicated by arrows L11 and L12, light incident from the second substrate 52 side is modulated while being reflected and emitted from the first substrate 51 side, and an image is displayed. For this reason, when the electro-optical panel 40 is a reflective liquid crystal panel, a transparent substrate such as a quartz substrate can be used for both the first substrate 51 and the second substrate 52. Further, a translucent substrate such as a quartz substrate can be used for the second substrate 52, and a semiconductor substrate such as a silicon substrate can be used for the first substrate 51.

When the electro-optical panel 40 is a reflective liquid crystal panel, a translucent dust-proof glass 57 is attached to the second surface 52 b side of the second substrate 52. On the other hand, when the electro-optical panel 40 is a transmissive liquid crystal panel, a translucent dustproof glass 57 is attached to the second surface 52b of the second substrate 52, and the second surface 51b of the first substrate 51. Also, a dust-proof glass 57 is attached.

In the following description, the case where the electro-optical panel 40 is a reflective liquid crystal panel and a quartz substrate is used for both the first substrate 51 and the second substrate 52 is exemplified.

The electro-optical panel 40 can be used as, for example, a color display device of an electronic device such as a mobile computer or a mobile phone. In this case, a color filter (not shown) is formed on the second substrate 52. The electro-optical panel 40 can be used as a light valve for RGB in a projection display device (liquid crystal projector) described later.
In this case, each of the RGB electro-optical panels 40 receives light of each color separated through RGB color separation dichroic mirrors as projection light, so that no color filter is formed. .

(Overall configuration of electro-optic module 100)
FIG. 2 is an explanatory diagram of the electro-optic module 100 according to Embodiment 1 of the present invention.
(A), (b) is a perspective view when the electro-optic module 100 is seen from the light emission side, and a perspective view when the state where the electro-optic panel 40 is fixed to the plate 2 is seen from the light emission side. FIG. 3 is an exploded perspective view of the electro-optic module 100 according to Embodiment 1 of the present invention.

As shown in FIG. 2 and FIG. 3, the electro-optical panel 40 is provided with a plate 2 (
And the electro-optic module 100 supported by the frame 3 is mounted on the electronic apparatus. In this embodiment, the electro-optic module 100 includes the plate 2 to which the electro-optic panel 40 is fixed, the frame 3 surrounding the side of the electro-optic panel 40, and the parting member 8 attached to the light emitting side of the frame 3. I have.

The frame 3 includes a frame portion 31 that surrounds the side of the electro-optical panel 40 and an end plate portion 32 that covers the light emission side of the electro-optical panel 40, and the frame portion 31 is bonded to the plate 2. It is fixed by a method such as screwing. The frame 3 is made of resin or metal. In the end plate portion 32, a rectangular opening 320 is formed in a region overlapping the dustproof glass 57 of the electro-optical panel 40.

The parting member 8 has a light shielding plate portion 81 that overlaps the end plate portion 32 of the frame 3 on the opposite side to the electro-optical panel 40. In the light shielding plate portion 81, the display area 40 a of the electro-optical panel 40 A rectangular opening 810 is formed in the overlapping region. The parting member 8 is made of resin or metal. In the parting member 8, the light shielding plate 81 functions as a parting part for the display area 40a. Among the outer peripheral edges of the light shielding plate portion 81, the parting member 8 of this embodiment has X
The connecting plate portion 85 that overlaps the outer surface 310 of the frame portion 31 of the frame 3 from the edges located on both sides in the direction.
Is extended. Further, an engagement hole 850 is formed in the connecting plate portion 85, and an engagement convex portion 315 that engages with the engagement hole 850 is formed on the outer surface 310 of the frame portion 31. Therefore, the parting member 8 is fixed to the frame 3 via the connecting plate portion 85.

(Configuration of plate 2)
FIG. 4 is an explanatory diagram showing a structure for fixing the electro-optical panel 40 to the plate 2 in the electro-optical module 100 according to Embodiment 1 of the present invention, and FIGS. 4 (a), 4 (b), and 4 (c). FIG. 3 is a plan view of the state in which the electro-optical panel 40 is fixed to the plate 2 as viewed from the light emitting side, a cross-sectional view of the state in which the electro-optical panel 40 is fixed to the plate 2, It is sectional drawing which expands and shows a part. FIG. 5 is an explanatory diagram showing a process of fixing the electro-optical panel 40 to the plate 2 in the electro-optical module 100 according to Embodiment 1 of the present invention. FIGS. 5 (a), 5 (b), and 5 (c) are diagrams. The plan view of the plate 2 as viewed from the light emitting side, the plan view of the state in which the electro-optical panel 40 is arranged in the panel arrangement hole 20 of the plate 2, and the electro-optical panel 40 fixed to the plate 2 by the UV curable adhesive 9 It is a top view of a state.

As shown in FIGS. 2, 3, 4, and 5 (a), the plate 2 has a flat plate shape, and a panel arrangement hole 20 that penetrates the plate 2 in the thickness direction is formed at the center. The panel arrangement hole 20 is a rectangular hole slightly larger than the electro-optic panel 40, and the electro-optic panel 40 is arranged inside the panel arrangement hole 20. A cutout 29 is formed on the side of the panel placement hole 20 where the flexible wiring board 40 i of the electro-optical panel 40 is placed, and the flexible wiring board 40 i is placed outside the frame 3 through the cutout 29. It has been pulled out (see FIG. 2 (a)).

When the electro-optical panel 40 is arranged in the panel arrangement hole 20 of the plate 2, the first substrate 51 is
The first surface 51 a of the first substrate 51 is positioned inside the panel arrangement hole 20 and is positioned substantially in the same plane as the first surface 2 a of the plate 2. On the other hand, the 2nd board | substrate 52 and the dust-proof glass 57 will be in the state protruded from the 1st surface 2a of the plate 2. FIG. Here, the thickness of the plate 2 (depth of the panel arrangement hole 20) is larger than the thickness of the first substrate 51. For this reason, the first substrate 51 is in a state where it enters the middle position from the first surface 2 a to the second surface 2 b of the plate 2 in the panel arrangement hole 20.

In order to maintain this state, the plate 2 has a second surface 2 in the thickness direction of the plate 2.
A bottom plate portion 23 is formed in a frame shape on the b side so as to protrude inside the panel arrangement hole 20 and overlap the electro-optical panel 40. The bottom plate portion 23 protrudes from the bottom plate portion 23 toward the electro-optical panel 40 side. A plurality of the panel support portions 230 are formed. In this embodiment, the panel support unit 230 is formed at four locations that overlap the vicinity of the four corners of the electro-optical panel 40 (first substrate 51), and the panel support unit 230 is near the four corners of the electro-optical panel 40. To support the electro-optical panel 40. In this state, a gap 235 corresponding to the height dimension of the panel support portion 230 exists between the electro-optical panel 40 and the bottom plate portion 23. Here, the four panel support portions 230 are arranged at four points symmetrical with respect to the center O of the electro-optical panel 40.

In this embodiment, the plate 2 is made of a metal plate having a thermal expansion coefficient equivalent to that of the first substrate 51. In this embodiment, since the first substrate 51 is made of a quartz substrate, the plate 2 is made of an alloy containing at least nickel and iron. For example, the plate 2 is made of a so-called Invar alloy (for example, 36Ni—Fe alloy, 42Ni—Fe alloy), 32Ni-5Co—Fe.
Alloy, 29Ni-17Co-Fe alloy, and the like. Of these alloys, for example, 36N
The linear expansion coefficient of the i-Fe alloy is about 1.2 × 10 ⁻⁶ (/ ° C.), and 32Ni-5Co—
The linear expansion coefficient of the Fe alloy is about 0.1 × 10 ⁻⁶ (/ ° C.), and the thermal expansion coefficient of the first substrate 51 (quartz substrate) (about 0.48 × 10 ⁻⁶ (/ ° C.)). ).

(Fixing structure of electro-optical panel 40 to plate 2)
In the electro-optical module 100 including the plate 2 configured as described above, the end of the electro-optical panel 40 and the plate 2 are bonded together by the UV curable adhesive 9, and the end of the electro-optical panel 40 and the plate 2 is bonded by an elastic adhesive 7 provided in a wider range than the UV curable adhesive 9. In this embodiment, the end of the electro-optical panel 40 (
End surfaces 511, 512, 513, 514) of the first substrate 51 and the inner peripheral surface 20 of the panel arrangement hole 20.
There is a gap with zero. For this reason, the UV curable adhesive 9 and the elastic adhesive 7 are provided on the first surface 2 a side of the plate 2 so as to straddle the end of the electro-optical panel 40 and the plate 2, and the electro-optical panel 40. The UV curable adhesive 9 and the elastic adhesive 7 also enter the gap between the end of the panel and the inner peripheral surface 200 of the panel arrangement hole 20.

In this embodiment, the UV curable adhesive 9 is, for example, a modified acrylate type, the hardness after curing is 83 ± 3 in Type A of JIS-K-7215, and the shrinkage rate upon curing is 3. 3
%. The UV curable adhesive 9 has a linear expansion coefficient of about 200 × 10 ⁻⁶ (/ ° C.) and an elastic modulus of 18.7 Mpa. The elastic adhesive 7 is, for example, a silyl group-containing polymer and has room temperature curability. In this embodiment, the elastic adhesive 7 has a hardness after curing of J.
IS-K-7215 type A is about 40, and the shrinkage rate upon curing is about 2.3%.
The elastic adhesive 7 has a linear expansion coefficient of 380 to 400 (/ ° C) and an elastic modulus of 3.15.
~ 3.3 Mpa.

Here, the UV curable adhesive 9 is a center O of the electro-optical panel 40 as described below.
Are provided at four points symmetrical to each other. More specifically, the electro-optical panel 40 (first
The substrate 51) has a quadrangular planar shape, and the UV curable adhesive 9 is provided on each of two opposing sides in the quadrangle. In this embodiment, the UV curable adhesive 9 is an end face 51 located on the two long sides of the four sides of the electro-optical panel 40 (first substrate 51).
3, 514 are provided at two locations. Also, the electro-optical panel 40 (first substrate 51)
In the end face 513, the UV curable adhesive 9 is provided at a total of two locations separated from the center in the X direction of the end face 513 by the one side X1 and the other side X2, and the electro-optical panel 40 (first substrate 51). In the end surface 514, UV curable adhesives 9 are provided at a total of two locations separated from the center of the end surface 514 in the X direction by an equal distance from the one side X1 and the other side X2.

Accordingly, the four UV curable adhesives 9 are point-symmetric with respect to the center O of the electro-optical panel 40. Further, as shown in FIG. 4A, the four UV curable adhesives 9 are line symmetric with respect to the center line Lx extending in the X direction through the center O of the electro-optical panel 40, Axisymmetric with respect to a center line Ly extending in the Y direction through the center O of the electro-optic panel 40. here,
On the end surface 514 side of the electro-optical panel 40 (first substrate 51), the flexible wiring substrate 40 is provided.
Since i is connected, on the end surface 514 side, UV curable adhesive 9 is provided at two places on both sides of the flexible wiring board 40i. Therefore, on the side of the end face 514, UV
The curable adhesive 9 is provided with an interval wider than the width dimension of the flexible wiring substrate 40i, and the UV curable adhesive 9 is also formed on the end surface 513 side of the UV curable flexible wiring substrate 40i on the end surface 514 side. It is provided with an interval wider than the width dimension.

In contrast, the elastic adhesive 7 has two long sides (end surfaces 5) provided with the UV curable adhesive 9.
13 and 514) and extend along two short sides (end surfaces 511 and 512) adjacent to each other. In this embodiment, the elastic adhesive 7 is formed on the end face 5 at the end face 511 side.
11 extends from the center in the Y direction toward the one side Y1 and the other side Y2 to an equidistant position. Further, the elastic adhesive 7 extends from the center in the Y direction of the end surface 512 toward the one side Y1 and the other side Y2 on the end surface 512 side to a position equidistant, and the elastic adhesive 7 includes the end surface 511. On the 512 side, the same length is provided in the Y direction. For this reason,
The two elastic adhesives 7 are point-symmetric with respect to the center O of the electro-optical panel 40. As shown in FIG. 4A, the two elastic adhesives 7 are line symmetric with respect to a center line Lx extending in the X direction through the center O of the electro-optical panel 40, and are electro-optical. It is symmetrical with respect to a center line Ly extending in the Y direction through the center O of the panel 40.

(Method of manufacturing electro-optic module 100)
A process of fixing the electro-optical panel 40 to the plate 2 in the manufacturing process of the electro-optical module 100 of the present embodiment will be described with reference to FIGS.

FIG. 6 is an explanatory diagram of a first bonding step of bonding the plate 2 and the electro-optical panel 40 with the UV curable adhesive 9 in the electro-optical module 100 according to Embodiment 1 of the present invention. a), (b), and (c) are explanatory diagrams when UV curable adhesive 9 is applied one by one, explanatory diagrams when UV curable adhesive 9 is applied two by two, and UV curable It is explanatory drawing in the case of apply | coating the adhesive agent 9 to the whole four places.

In this embodiment, first, as shown in FIG. 5B, the electro-optical panel 40 is arranged in the panel arrangement hole 20 of the plate 2 (support member). In this state, the electro-optical panel 40 is moved to the plate 2.
The four panel support portions 230 are point-supported.

Next, as illustrated in FIG. 5C, in the first fixing step, UV is provided between the end portion of the electro-optical panel 40 and the plate 2 at four points symmetrical with respect to the center O of the electro-optical panel 40. After the curable adhesive 9 is applied, the UV curable adhesive 9 is cured by irradiating the UV curable adhesive 9 with UV light.

In the first bonding step, for example, first, a first application step of applying the UV curable adhesive 9 to some of the four locations, and the UV curable adhesive 9 applied to some of the locations. And a first curing step in which the UV curable adhesive 9 is cured by irradiating with UV light. Next, a second coating step in which the UV curable adhesive 9 is applied to the other part of the four parts, and the UV curable adhesive 9 applied to the other part is irradiated with UV light to be UV curable. A second curing step for curing the adhesive 9 is performed.

At that time, as shown in FIG. 6A, when the UV curable adhesive 9 is applied one by one by one dispenser 911, the UV irradiation device 916 applies UV to the UV curable adhesive 9 applied to one place. After irradiating light to cure the UV curable adhesive 9, the same process is repeated at other locations.

Further, as shown in FIG. 6B, when two UV curable adhesives 9 are simultaneously applied by two dispensers 911, the UV irradiation device 916 applies UV light to the UV curable adhesive 9 applied to the two locations. After simultaneously irradiating light to cure the two UV curable adhesives 9 at the same time, the same process is repeated at other locations.

Further, as shown in FIG. 6 (c), as shown in the first bonding process, the four dispensers 911 simultaneously apply the UV curable adhesive 9 to all four places, and the four places are applied. The UV curable adhesive thus prepared is simultaneously irradiated with UV light from a UV irradiation device 916, and 4
A curing step of simultaneously curing the UV curable adhesive 9 at a location may be performed.

According to this method, since the UV curable adhesive 9 is cured immediately after being applied, it is difficult for the UV curable adhesive 9 before curing to flow to an unnecessary part. In the case where the UV curable adhesive 9 is simultaneously applied to a plurality of places and then the UV curable adhesive 9 applied to the plurality of places is simultaneously irradiated with UV light to cure the UV curable adhesive 9, The application of the UV curable adhesive 9 to four locations and the curing of the four UV curable adhesives 9 can be performed in a short time.

After performing the first bonding step, as shown in FIG. 4A, in the second fixing step, the ends of the electro-optical panel 40 are two symmetrical with respect to the center O of the electro-optical panel 40. After applying the elastic adhesive 7 between the plate and the plate 2, the elastic adhesive 7 is cured by leaving it at room temperature. As a result, in the electro-optical module 100, the end of the electro-optical panel 40 and the plate 2 are bonded by the UV curable adhesive 9, and the end of the electro-optical panel 40 and the plate 2 are bonded by UV curable bonding. Bonded by the elastic adhesive 7 provided in a wider range than the agent 9.

(Main effects of this form)
As described above, in this embodiment, since the electro-optical panel 40 and the plate 2 (support member) are fixed by the UV curable adhesive 9 and the elastic adhesive 7, the electro-optical panel 40.
And the plate 2 can be securely fixed. Here, since the UV curable adhesive 9 is provided at four points symmetrical with respect to the center O of the electro-optical panel 40, the electro-optical panel 4.
When 0 rises in temperature or receives a force from the outside, the stress received from the fixing position by the UV curable adhesive 9 is dispersed and hardly biased. In addition, the elastic adhesive 7 adheres the end of the electro-optical panel 40 and the plate 2 in a wider range than the UV curable adhesive 9, but since the elastic adhesive 7 has elasticity, Even when the temperature of the electro-optical panel 40 rises or when a force is applied from the outside, stress is not easily applied to the electro-optical panel. Therefore, it is difficult for the electro-optical panel 40 to be deformed.

In particular, since the electro-optical panel 40 of this embodiment is a reflective liquid crystal panel, if the electro-optical panel 40 is deformed and the phase difference fluctuates in the in-plane direction, unevenness occurs when black is displayed and the display quality is improved. However, according to the present embodiment, such display quality is unlikely to deteriorate.

The UV curable adhesive 9 is provided on each of two opposite sides of the electro-optic panel 40, and the elastic adhesive 7 is provided so as to extend along the other two sides. . For this reason, since the elastic adhesive 7 can be provided in a wide range, the electro-optical panel 40 and the plate 2
(Support member) can be securely fixed. Further, since the UV curable adhesive 9 is provided on the side of the electro-optical panel 40 to which the flexible wiring board 40i is connected, two sides that are different from the side to which the flexible wiring board 40i is connected. The elastic adhesive 7 can be provided so as to extend along the line. For this reason, since the elastic adhesive 7 can be provided in a wide range, the electro-optical panel 40 and the plate 2 (support member) can be reliably fixed.

Further, since the plate 2 is provided with a panel support portion 230 that supports the electro-optical panel 40 in a point manner, even when the electro-optical panel 40 is deformed due to stress, the electro-optical panel 4 is deformed.
0 is held in an appropriate posture by the plurality of panel support portions 230.

Further, in this embodiment, since the electro-optical panel 40 and the plate 2 are fixed by the UV curable adhesive 9 and then the elastic adhesive 7 is provided, the electro-optical panel 40 and the plate 2 until the elastic adhesive 7 is cured. No work or the like is required to prevent misalignment. For this reason, the productivity of the electro-optic module 100 can be increased. Further, in this embodiment, since the UV curable adhesive 9 is cured immediately after being applied, it is difficult for the UV curable adhesive 9 before curing to flow to an unnecessary part. For this reason, since the UV curable adhesive 9 does not easily wrap around to the back surface side of the electro-optical panel 40, it is difficult to cause a situation where stress is applied to the electro-optical panel 40 due to the variation in the amount of wrap-around.

[Embodiment 2]
FIG. 7 is a plan view showing a structure for fixing the electro-optic panel 40 to the plate 2 in the electro-optic module 100 according to Embodiment 2 of the present invention. Since the basic configuration of the present embodiment and later-described third and fourth embodiments is the same as that of the first embodiment, common portions are denoted by the same reference numerals and description thereof is omitted.

In the first embodiment, the elastic adhesive 7 is provided in a range of ½ or more of the sides of the electro-optical panel 40 (end surfaces 511 and 512 of the first substrate 51). However, as shown in FIG. The elastic adhesive 7 may be provided in a range of less than ½ of 40 sides (end surfaces 511 and 512 of the first substrate 51).

[Embodiment 3]
FIG. 8 is a plan view showing a structure for fixing the electro-optical panel 40 to the plate 2 in the electro-optical module 100 according to Embodiment 3 of the present invention.

In the first embodiment, the elastic adhesive 7 is provided along the sides of the electro-optical panel 40 (end surfaces 511 and 512 of the first substrate 51). However, as shown in FIG. The elastic adhesive 7 may be provided on (four corners of the first substrate 51). In this embodiment, the elastic adhesive 7
Are the sides of the electro-optical panel 40 from the four corners (end surfaces 511, 512, 513 of the first substrate 51).
514), and the elastic adhesive 7 covers the UV curable adhesive 9. Here, the elastic adhesive 7 is applied to the sides of the electro-optical panel 40 (end surfaces 511 and 51 of the first substrate 51).
2, 513, 514) of the portion extending along the end surfaces 511, 512, 5,
13 or less of the length of 514. For this reason, the four elastic adhesives 7 are separated from each other and are not connected.

[Embodiment 4]
FIG. 9 is a plan view showing a structure for fixing the electro-optical panel 40 to the plate 2 in the electro-optical module 100 according to Embodiment 4 of the present invention.

In the first embodiment, the two sides of the electro-optical panel 40 (end surfaces 513 and 51 of the first substrate 51).
4), the UV curable adhesive 9 is provided. However, in this embodiment, as shown in FIG. 7, the four UV curable adhesives 9 are provided on the four sides of the electro-optical panel 40 (on the first substrate 51). End faces 511, 512,
513, 514), one each, and four in total. Here, four UV
The curable adhesive 9 is provided at a position spaced apart from the corner of the electro-optical panel 40 by a certain dimension in the same direction. For this reason, since the UV curable adhesive 9 is provided at four points symmetrical with respect to the center O of the electro-optical panel 40, the electro-optical panel 40 receives a force from the outside when the temperature rises. At this time, the stress received from the fixing position by the UV curable adhesive 9 is dispersed, and the same effects as in the first embodiment are obtained, such as being difficult to be biased.

[Other forms of electro-optic module]
In the above-described embodiment, the electro-optic module 100 including the reflective electro-optic panel 40.
However, the present invention may be applied to the electro-optic module 100 including the transmissive electro-optic panel 40.

In the above embodiment, a liquid crystal panel has been described as an example of the electro-optical panel 40.
The present invention is not limited to this, and an organic electroluminescence display panel, plasma display panel, FED (Field Emission Display) panel, SED (Surface-Conducti)
The present invention may be applied to an electro-optic module using an on-electron-emitter display (LED) panel, an LED (light emitting diode) display panel, an electrophoretic display panel, or the like.

[Example of mounting on electronic devices]
(Configuration example of a projection display device)
FIG. 10 is a schematic configuration diagram of an example of a projection display device (electronic apparatus) to which the present invention is applied.
In the following description, three electro-optic modules 100 according to the above-described embodiment are used, and the electro-optic panels 40 of the three electro-optic modules 100 are respectively a red liquid crystal panel 100R, a green liquid crystal panel 100G, and a blue liquid crystal panel. Used as 100B.

A projection display apparatus 1000 shown in FIG. 10 separates a light source unit 1021 that generates light source light and light source light emitted from the light source unit 1021 into three color lights of red light R, green light G, and blue light B. A color separation light guide optical system 1023, and a light modulation unit 1025 illuminated by the light source light of each color emitted from the color separation light guide optical system 1023. In addition, the projection display device 100
Reference numeral 0 denotes a cross dichroic prism 1027 (combining optical system) that synthesizes image light of each color emitted from the light modulation unit 1025 and a projection optical system 1029 that projects image light that has passed through the cross dichroic prism 1027 onto a screen (not shown). And. In this embodiment, the plurality of electro-optic modules 100 (reflection type liquid crystal device) and the cross dichroic prism 1027 (light combining optical system) constituting the light modulation unit 1025 constitute an optical unit 1200.

In the projection display apparatus 1000, the light source unit 1021 includes a light source 1021a, a pair of fly-eye optical systems 1021d and 1021e, a polarization conversion member 1021g, and a superimposing lens 1021i. In the present embodiment, the light source unit 1021 includes a reflector 1021f having a paraboloid and emits parallel light. Fly's eye optical system 1021d, 10
21e is composed of a plurality of element lenses arranged in a matrix in a plane orthogonal to the system optical axis, and the light source light is divided by these element lenses to be individually condensed and diverged. The polarization conversion member 1021g converts the light source light emitted from the fly-eye optical system 1021e into, for example, only a p-polarized component parallel to the drawing, and supplies it to the optical path downstream optical system. The superimposing lens 1021i allows the plurality of electro-optic modules 100 provided in the light modulation unit 1025 to be uniformly superimposed and illuminated by appropriately converging the light source light that has passed through the polarization conversion member 1021g as a whole.

The color separation light guide optical system 1023 includes a cross dichroic mirror 1023a, a dichroic mirror 1023b, and reflection mirrors 1023j and 1023k. In the color separation light guide optical system 1023, the substantially white light source light from the light source unit 1021 enters the cross dichroic mirror 1023a. The red light R reflected by one of the first dichroic mirrors 1031a constituting the cross dichroic mirror 1023a is reflected by the reflecting mirror 1023j, passes through the dichroic mirror 1023b, and transmits the incident side polarizing plate 1037r and p-polarized light. The light enters the electro-optic module 100 (red liquid crystal panel 100R) as p-polarized light through the wire grid polarizer 1032r that reflects s-polarized light and the optical compensation plate 1039r.

Further, the green light G reflected by the first dichroic mirror 1031a is reflected by the reflection mirror 10.
23j, then reflected by the dichroic mirror 1023b, and incident-side polarizing plate 1037g, which transmits p-polarized light while reflecting s-polarized light.
032g and the optical compensator 1039g, the electro-optic module 1 remains p-polarized.
Enter 00 (green liquid crystal panel 100G).

On the other hand, the blue light B reflected by the other second dichroic mirror 1031b constituting the cross dichroic mirror 1023a is reflected by the reflection mirror 1023k,
The incident-side polarizing plate 1037b transmits the p-polarized light while reflecting the s-polarized light, and reflects the s-polarized light to the electro-optic module 100 (blue liquid crystal panel 100B) while maintaining the p-polarized light through the optical compensation plate 1039b. Incident. The optical compensator 1039r, 1
039g and 1039b optically compensate the characteristics of the liquid crystal layer by adjusting the polarization state of the incident light and the outgoing light to the electro-optic module 100.

In the projection display apparatus 1000 configured as described above, the optical compensation plates 1039r and 1039g
Each of the three colors of light incident through 1039b is modulated in each electro-optic module 100. At that time, of the modulated light emitted from the electro-optic module 100, the s-polarized component light is reflected by the wire grid polarizers 1032r, 1032g, and 1032b, and cross-dichroic via the exit-side polarizers 1038r, 1038g, and 1038b. Prism 102
7 is incident. The cross dichroic prism 1027 is formed with a first dielectric multilayer film 1027a and a second dielectric multilayer film 1027b that intersect in an X shape, and the first dielectric multilayer film 1027a reflects the red light R. The other second dielectric multilayer film 1027b reflects the blue light B. Therefore, the three colors of light are combined by the cross dichroic prism 1027 and emitted to the projection optical system 1029. The projection optical system 1029 projects the color image light combined by the cross dichroic prism 1027 onto a screen (not shown) at a desired magnification.

(Other projection display devices)
For the projection display device, an LED light source that emits light of each color is used as the light source unit, and the color light emitted from the LED light source is supplied to another electro-optic module (liquid crystal device). It may be configured.

(Other electronic devices)
The electro-optical module 100 to which the present invention is applied includes, in addition to the above electronic devices, a mobile phone, a personal digital assistant (PDA), a digital camera,
You may use as a direct-view display apparatus in electronic devices, such as a liquid crystal television, a car navigation apparatus, a videophone, a POS terminal, and the apparatus provided with the touch panel.

2. Plate (support member), 2a, 1st surface, 2b, 2nd surface, 3 frame, 7
· Elastic adhesive, 8 · · Parting member, 9 · · UV curable adhesive, 20 · · Panel placement holes, 2
3 .. Bottom plate part, 40... Electro-optical panel, 40 a... Display area, 51.
..Second substrate, 57..Dustproof glass, 200..Inner peripheral surface of panel placement hole, 405a ..Pixel electrode, 421 ..Common electrode, 450 ..Electro-optic layer, 511-514. Edge of optical panel), 100 ... electro-optical module, 1000 ... projection type display device, 10
21 .. Light source unit, 1029 .. Projection optical system

Claims (12)

An electro-optic panel;
A support member;
A curable adhesive that bonds the end of the electro-optic panel and the support member;
An elastic adhesive that bonds the end of the electro-optic panel and the support member in a wider range than the curable adhesive;
Have
The curable adhesive is provided at four points symmetrical with respect to the center of the electro-optical panel.
The electro-optical panel has a rectangular planar shape,
In the electro-optical panel, a flexible wiring board is connected to one long side of two opposite long sides,
The curable adhesive is provided at two locations sandwiching the connection position of the flexible wiring board from both sides on the one long side, and is provided at two locations on the opposite long side.
The electro-optic module , wherein the elastic adhesive is provided so as to extend along two sides adjacent to the two long sides in the rectangle . The support member is formed with a panel placement hole in which the electro-optic panel is placed inside,
2. The electro-optic module according to claim 1, wherein at least an end portion of the electro-optic panel and an inner peripheral surface of the panel arrangement hole are bonded by the curable adhesive and the elastic adhesive. The support member includes a bottom plate portion that protrudes inside the panel arrangement hole and overlaps the electro-optical panel,
A plurality of panel support portions that protrude toward the electro-optical panel and support the electro-optical panel are respectively formed on the bottom plate portion at the same position as the curable adhesive on the long side. The electro-optic module according to claim 2. The electro-optic module according to claim 3 , wherein the curable adhesive bulges upward from an end portion of the electro-optic panel . The electro-optical panel includes: a first substrate on which pixel electrodes are formed; a second substrate on which a common electrode is formed by being bonded to the first substrate with a sealing material; and the first substrate and the second substrate. A liquid crystal layer provided in a space surrounded by the sealing material,
Electro-optical module according to any one of claims 1 to 4, characterized in that the ends of the electro-optical panel is constituted by an end portion of the first substrate. The electro-optic module according to claim 5 , wherein the pixel electrode is made of a reflective electrode.   The electro-optic module according to claim 1, wherein the curable adhesive is a UV curable adhesive. An electro-optic module manufacturing method in which an electro-optic panel having a rectangular planar shape is bonded to a support member,
A first bonding step of bonding an end portion of the electro-optic panel and the support member with a curable adhesive at four points symmetrical with respect to the center of the electro-optic panel;
A second bonding step of bonding the end portion of the electro-optic panel and the support member in a wider range than the curable adhesive with an elastic adhesive having elasticity after curing;
I have a,
The four locations of the first bonding step are two locations that sandwich the connected flexible wiring board from both sides on one long side of the two long sides facing each other, and 2 on the other long side facing each other. It is a place,
In the second bonding step, wherein the elastic adhesive is manufacturing an electro-optical module, characterized in Rukoto provided so as to extend along the two sides in the rectangle adjacent to the two long sides Method.   The support member includes a bottom plate portion that protrudes inside the panel arrangement hole and overlaps the electro-optical panel,
  The bottom plate portion is provided with a plurality of panel support portions that protrude toward the electro-optical panel and support the electro-optical panel,
  9. The method of manufacturing an electro-optic module according to claim 8, wherein, in the first adhesion step, the curable adhesive is provided from an end portion to an upper portion of the electro-optic panel. The curable adhesive is a UV curable adhesive;
In the first bonding step, a UV coating adhesive is applied to the UV curable adhesive applied to the part of the first application step of applying the UV curable adhesive to a part of the four parts. A first curing step of irradiating light to cure the UV curable adhesive; a second coating step of applying the UV curable adhesive to other locations of the four locations; and the other locations. 10. The electro-optic module according to claim 8 , wherein a second curing step of irradiating the applied UV curable adhesive with UV light to cure the UV curable adhesive is performed. Production method. The curable adhesive is a UV curable adhesive;
Wherein the first bonding step, the a coating step of applying UV-curable adhesive at the same time, by irradiating the UV light simultaneously to the UV-curable adhesive applied the in four places in all of the four positions The method of manufacturing an electro-optic module according to claim 8 or 9 , wherein a curing step of curing the UV curable adhesive is performed. An electronic apparatus comprising the electro-optic module according to any one of claims 1 to 7 ,
A light source unit for emitting light supplied to the electro-optical panel;
A projection optical system that projects light modulated by the electro-optical panel;
An electronic device characterized by comprising:

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