JP2016014755A - Electro-optic module and electronic equipment - Google Patents

Abstract

An electro-optic module that can be assembled efficiently even when a first flexible wiring board and a second flexible wiring board are connected to different sides of an electro-optic panel, and an electronic device including the electro-optic module are provided. about. An electro-optical module is connected to an electro-optical panel, a first flexible wiring substrate connected to a first side of the electro-optical panel, and a second side of the electro-optical panel. And a second flexible wiring board 70. When pulling out the first flexible wiring board 60 and the second flexible wiring board 70 from the first side 2 a side of the electro-optical panel 2, the second flexible wiring board 70 passes through the board housing groove 36 formed in the frame 30 and is first. Pull out from the side 2a. For this reason, when the electro-optic module 10 is assembled, the position of the second flexible wiring board 70 is defined. [Selection] Figure 2

Description

  The present invention relates to an electro-optical module in which a flexible wiring board is connected to different sides of an electro-optical panel, and an electronic apparatus including the electro-optical module.

  In an electronic apparatus such as a projection display device, an electro-optic module in which a flexible wiring board is connected to an electro-optic panel is used. In addition, the electro-optic module may employ a structure in which a first flexible wiring board and a second flexible wiring board are connected to each of different sides of the electro-optic panel (see Patent Document 1). Even in such a case, it is easier to assemble the electro-optic module if the first flexible wiring board and the second flexible wiring board are drawn out in the same direction. Therefore, in the electro-optic module described in Patent Document 1, a structure in which the second flexible wiring board is pulled out to a position overlapping with the first flexible wiring board and the first flexible wiring board and the second flexible wiring board are bonded is proposed. (See Patent Document 1).

JP 2004-118089 A

  However, in the case of the structure in which the first flexible wiring board and the second flexible wiring board are bonded as in the configuration described in Patent Document 1, the bonding process takes a lot of time and thus has a problem of low productivity. is there. Further, when the second flexible wiring board is pulled out to a position overlapping with the first flexible wiring board, the second flexible wiring board extends from a portion connected to the electro-optical panel to a portion connected to the first flexible wiring board. Since the portion to be floated without being fixed, it is necessary to avoid interference between the second flexible wiring board and other members when the electro-optical panel is accommodated in the case, so that productivity is reduced. There is a problem.

  In view of the above problems, an object of the present invention is to provide an electro-optic module that can be assembled efficiently even when the first flexible wiring board and the second flexible wiring board are connected to different sides of the electro-optic panel, and An object of the present invention is to provide an electronic apparatus including an electro-optic module.

  In order to solve the above problems, an electro-optical module according to the present invention includes an electro-optical panel, a first flexible wiring board connected to the first side of the electro-optical panel, and the first side of the electro-optical panel. A second flexible wiring board connected to a second side different from the first flexible wiring board, and a case for housing the electro-optic panel, wherein the case is formed with a substrate housing groove for housing the second flexible wiring board. The second flexible wiring board is drawn out from the first side through the board housing groove.

  In the present invention, the first flexible wiring board is connected to the first side of the electro-optical panel, and the second flexible wiring board is connected to a second side different from the first side of the electro-optical panel. Like the first flexible wiring board, the flexible wiring board is drawn from the side of the first side, so that the first flexible wiring board and the second flexible wiring board can be easily electrically connected to the outside. Further, since the second flexible wiring board is pulled out from the first side through the substrate housing groove formed in the case, the position of the second flexible wiring board is defined when the electro-optic module is assembled. Yes. For this reason, the electro-optical panel can be easily accommodated in the case without performing a laborious process such as bonding the first flexible wiring board and the second flexible wiring board. Therefore, even when the first flexible wiring board and the second flexible wiring board are connected to different sides of the electro-optical panel, the electro-optical module can be efficiently assembled.

  The present invention is more effective when applied when the second side is located on the opposite side of the electro-optical panel from the first side. In the case of such a configuration, since the second flexible wiring board has a long routing distance, it takes a lot of trouble to avoid interference between the second flexible wiring board and other members. Even in this case, since it is easy to avoid interference between the second flexible wiring board and other members, the electro-optic module can be assembled efficiently.

  In the present invention, the second flexible wiring board includes a first portion extending from the second side toward the opposite side of the first side, and a tip of the first portion along the second side. The second part extending along the third side connecting the one end of the first side of the electro-optical panel and the one side end of the second side from the tip of the second part. A third portion extending toward one side, wherein the substrate receiving groove extends along the second side and receives the second portion, and the first portion It is preferable to include at least one of third portion accommodating portions that extend along three sides and accommodate the third portion.

  In this invention, it is preferable that the said board | substrate accommodation groove | channel is equipped with both the said 2nd partial accommodating part and the said 3rd partial accommodating part.

  In the present invention, the substrate receiving groove has the third side and the other side end of the first side and the second with respect to the connection position of the electro-optical panel and the second flexible wiring board. It is preferable that the second side is connected to the other side end of the side. According to such a configuration, it is possible to optimize which side in the extending direction of the first side the second flexible wiring board is drawn out according to the orientation when the electro-optic module is mounted on an electronic device or the like. it can.

  In the present invention, the second flexible wiring board is bent between the second part and the third part, and one surface of the third part is set to the side of the side of the third side of the electro-optical panel. It is preferable to have the 1st bending part to face. According to this configuration, since the width occupied by the electro-optical panel and the second flexible wiring board can be reduced in the extending direction of the first side, the electro-optical module can be reduced in size.

  In the present invention, the second flexible wiring board is bent between the first portion and the second portion, and one surface of the second portion is placed on the side of the first side of the electro-optical panel. It is preferable to have the 2nd bending part to face. According to this configuration, since the width occupied by the electro-optical panel and the second flexible wiring board can be reduced in the extending direction of the third side, the electro-optical module can be reduced in size.

  In the present invention, the depth of the second portion accommodating portion changes in the extending direction, the second portion extends along the bottom of the second portion accommodating portion, and the third portion is a flat surface. You may employ | adopt the structure which overlaps between the display area of the said electro-optical panel, and the said 3rd edge | side visually. According to such a configuration, the third portion of the second flexible wiring board can be disposed within the range of the width direction of the electro-optical panel in the extending direction of the first side, so that the electro-optical module can be reduced in size. be able to.

  In the present invention, the substrate receiving groove may be formed from the second side on the back surface side of the bottom plate portion that is opposite to the electro-optical panel side of the bottom plate portion that overlaps the electro-optical panel in the case. It is preferable that the second flexible wiring board extends toward a side and is bent toward the back surface from a connection position with the electro-optical panel and is accommodated in the substrate accommodating groove. According to this configuration, the second flexible wiring board can be disposed within the range of the width direction of the electro-optical panel in the extending direction of the first side, so that the electro-optical module can be reduced in size.

  In the present invention, the electro-optical panel is a reflective electro-optical panel or a self-luminous electro-optical panel that emits display light toward a side opposite to the side of the bottom plate portion, and on the back side of the case A plurality of fins of ridges extending from the second side toward the first side are formed in parallel, and are formed between adjacent fins among the plurality of fins. A configuration in which any one of the recessed portions is used as the substrate receiving groove may be adopted. According to such a configuration, even when fins are formed on the back surface of the bottom plate portion, the second flexible wiring board can be passed through the back surface side of the bottom plate portion.

  In the present invention, in the plurality of fins, it is preferable that an interval between the fins in which the substrate receiving grooves are formed is wider than an interval between other fins. According to such a configuration, even when the interval between the fins is narrow, the second flexible wiring board can be passed through the back side of the bottom plate portion.

  The electro-optic module according to the present invention is used in various electronic devices. When the electronic device is a projection display device, the projection display device includes a light source unit for supplying light to the electro-optical panel and a projection optical system that projects light modulated by the electro-optical panel. ing.

It is a perspective view which shows typically a mode when the electro-optic module which concerns on Embodiment 1 of this invention is seen from the light emission side. FIG. 2 is an exploded perspective view schematically showing a state when the electro-optic module shown in FIG. 1 is viewed from the light emitting side. FIG. 2 is an exploded perspective view schematically showing a state when the electro-optic module shown in FIG. 1 is viewed from the light incident side. It is explanatory drawing of the electro-optical panel used for the electro-optical module shown in FIG. FIG. 2 is an enlarged perspective view showing the vicinity of a substrate housing groove of the electro-optic module shown in FIG. 1. It is the perspective view which looked at the 2nd flexible wiring board etc. which were used for the electro-optic module concerning Embodiment 2 of this invention from the 2nd board | substrate side. It is the perspective view which looked at the 2nd flexible wiring board etc. which were used for the electro-optic module concerning Embodiment 3 of this invention from the 2nd board | substrate side. It is the perspective view which looked at the 2nd flexible wiring board etc. which were used for the electro-optic module concerning Embodiment 4 of this invention from the 2nd board | substrate side. It is explanatory drawing of the electro-optic module which concerns on Embodiment 5 of this invention. It is a schematic block diagram of the projection type display apparatus (electronic device) using the electro-optic module to which this invention is applied.

  Embodiments of the present invention will be described with reference to the drawings. In the following description, an electro-optic module including a transmissive electro-optic panel (a transmissive liquid crystal panel) will be mainly described as the electro-optic module. 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 normal direction to the electro-optical panel is the Z direction, the direction in which the first flexible wiring board extends from the electro-optical panel is the Y direction, and the directions perpendicular to the Y direction and the Z direction are The description will be made with the X direction.

[Embodiment 1]
(Overall configuration of electro-optic module 10)
FIG. 1 is a perspective view schematically showing a state when the electro-optic module according to Embodiment 1 of the present invention is viewed from the light emitting side. FIG. 2 is an exploded perspective view schematically showing a state when the electro-optic module shown in FIG. 1 is viewed from the light emitting side. FIG. 3 is an exploded perspective view schematically showing a state when the electro-optic module shown in FIG. 1 is viewed from the light incident side. 4 is an explanatory diagram of the electro-optical panel used in the electro-optical module shown in FIG. 1. FIGS. 4A and 4B are a perspective view and a cross-sectional view of the electro-optical panel as viewed from the second substrate side. It is.

  As shown in FIGS. 1 to 4, the electro-optic module 10 of this embodiment includes an electro-optic panel 2 and a case 3 that houses the electro-optic panel 2. In this embodiment, the case 3 includes a frame 30 that supports the electro-optical panel from one side L1 (light incident side), and a plate (not shown) that supports the electro-optical panel 2 from the other side L2 (light emitting side). have. The electro-optic module 10 includes a first flexible wiring board 60 connected to the electro-optic panel 2 and an integrated circuit 90 mounted on the first flexible wiring board 60. The integrated circuit 90 is a driving IC for the electro-optical panel 2, and the first flexible wiring board 60 supplies various signals and a common potential to the electro-optical panel 2.

  Further, a second flexible wiring board 70 to be described later is connected to the electro-optical panel 2. In this embodiment, the second flexible wiring board 70 supplies a common potential to the electro-optical panel 2. Therefore, even when the impedance of the wiring that supplies the common potential from the first flexible wiring board 60 to the electro-optical panel 2 is high, the common potential is supplied from the second flexible wiring board 70 to the electro-optical panel 2. stable.

  In the electro-optic module 10 having such a configuration, a transmissive liquid crystal panel is used as the electro-optic panel 2. Therefore, as indicated by an arrow L, when light source light enters the electro-optical panel 2 from one side L1, the light source light is modulated by the electro-optical panel 2 and emitted to the other side L2, thereby displaying an image.

(Configuration of electro-optical panel 2)
As shown in FIG. 4 and the like, in the electro-optical panel 2, the first substrate 21 (element substrate) and the second substrate 22 (counter substrate) are bonded to each other with a sealing material 25 through a predetermined gap. In the present embodiment, the second substrate 22 is located on the frame 30 side (one side L1) with respect to the first substrate 21.

  For the first substrate 21 and the second substrate 22, translucent substrates such as quartz glass and heat-resistant glass are used. In the electro-optical panel 2, a liquid crystal layer as an electro-optical material layer 26 is held in a region surrounded by the sealing material 25 between the first substrate 21 and the second substrate 22. Further, on the surface of the first substrate 21 on the second substrate 22 side, a pixel electrode 21s made of a light-transmitting conductive film such as an ITO (Indium Tin Oxide) film or an IZO (Indium Zinc Oxide) film, a pixel transistor (not shown). The alignment film 21t and the like are formed. A common electrode 22s made of a light-transmitting conductive film such as an ITO film or an IZO film, an alignment film 22t, a light shielding film 22r, and the like are formed on the surface of the second substrate 22 on the first substrate 21 side. The electro-optic material layer 26 is driven for each pixel by 21s and the common electrode 22s. At that time, the common potential supplied from the first flexible wiring board 60 and the second flexible wiring board 70 is supplied to the common electrode 22s and the like. Further, the first substrate 21 is formed with a storage capacitor with a capacitance line (not shown), and the first flexible wiring substrate 60 and the second flexible wiring substrate 70 are also supplied to the capacitance line. A common potential is supplied.

  In the present embodiment, the first substrate 21 is a quadrangle, and the second substrate 22 is also a quadrangle like the first substrate 21. Therefore, the first substrate 21 includes a first side 21a extending in the X direction, a second side 21b opposite to the first side 21a on the opposite side to the first side 21a, and one side of the first side 21a. A third side 21c that connects the end and one end of the second side 21b, and a fourth side 21d that connects the other side end of the first side 21a and the other side end of the second side 21b. doing. The second substrate 22 includes a first side 22a extending in the X direction, a second side 22b opposite to the first side 22a and facing the first side 22a, and one side of the first side 22a. A third side 22c that connects the end and one end of the second side 22b; and a fourth side 22d that connects the other end of the first side 22a and the other end of the second side 22b. doing. The electro-optical panel 2 is also rectangular, and has a first side 2a extending in the X direction, a second side 2b facing the first side 2a on the opposite side to the first side 2a, and a first side 2a. A fourth side 2d that connects the third side 2c that connects one end of the second side and the one side end of the second side 2b, and the other side end of the first side 2a and the other side end of the second side 2b. And have.

  Here, the first substrate 21 is larger in size than the second substrate 22. Accordingly, the first side 2 a of the electro-optical panel 2 is configured by the first side 21 a of the first substrate 21, and the second side 2 b of the electro-optical panel 2 is configured by the second side 21 b of the first substrate 21, The third side 2 c of the electro-optical panel 2 is configured by the third side 21 c of the first substrate 21, and the fourth side 2 d of the electro-optical panel 2 is configured by the fourth side 21 d of the first substrate 21. Further, the first side 21a, the second side 21b, the third side 21c, and the fourth side 21d of the first substrate 21 are respectively the first side 22a, the second side 22b, the third side 22c, and the second side 22c of the second substrate 22. Projecting from the four sides 22d, the first substrate 21 has projecting portions 21e, 21f, 21g, and 21h projecting from the second substrate 22. For this reason, the side surface of the electro-optical panel 2 is configured by the side surface of the first substrate 21.

  The first substrate 21 has an inter-substrate continuity for establishing electrical continuity between the first substrate 21 and the second substrate 222 in a region overlapping the corner portion of the second substrate 22 outside the sealing material 25. A material (not shown) is disposed, and the common electrode 22s of the second substrate 22 is electrically connected to the first substrate 21 side via an inter-substrate conductive material. For this reason, a common potential is applied to the common electrode 22s from the first substrate 21 side.

  In the electro-optical panel 2, a first light-transmitting plate 23 is attached to a surface of the first substrate 21 opposite to the second substrate 22 (the other side L <b> 2), and the second substrate 22 is opposite to the first substrate 21. The 2nd translucent board 24 is affixed on the surface (one side L1). The first light transmissive plate 23 and the second light transmissive plate 24 are dust-proof glass. Such dust-proof glass (the first translucent plate 23 and the second translucent plate 24) prevents foreign matter such as dust from adhering directly to the first substrate 21 and the second substrate 22 to thereby prevent foreign matter such as dust on the image. To prevent reflection. The first light transmissive plate 23 is larger in size than the display region 2 p and smaller in size than the first substrate 21. The second light transmissive plate 24 is larger than the display area 2p and smaller than the second substrate 22.

(Configuration of the first flexible wiring board 60)
On the side of the first side 2a of the electro-optic panel 2, a plurality of first terminals 29 are arranged along the first side 21a on the projecting portion 21e of the first substrate 21, and the first terminal 29 and the display area 2p are arranged. A data line driving circuit 271 is formed between the two. In the first substrate 21, a scanning line driving circuit 272 is formed along the third side 21c and the fourth side 21d adjacent to the first side 21a.

  In the present embodiment, the first terminals 29 are arranged in two rows along the first side 21a of the protruding portion 21e, and the first substrate 21 includes a first terminal between the first side 21a and the display region 2p. A plurality of first terminals 29a arranged along the side 21a and a plurality of second terminals 29b arranged along the first side 21a are formed between the first terminal 29a and the display region 2p. .

  In addition, two first flexible wiring boards 60 (first flexible wiring boards 61 and 62) are connected to the first terminal 29, and two first flexible wiring boards 60 (first flexible wiring boards 61 and 62). ) Is drawn from the first side 21a to the side opposite to the electro-optical panel 2 in the Y direction. More specifically, among the first terminals 29 formed on the first substrate 21, one substrate surface 61 a of the end 611 of the first flexible wiring substrate 61 is connected to the first terminal 29 a and the first terminal 29 a is connected to the first terminal 29 a. The flexible wiring board 61 has an extending part 612 that extends in a direction away from the electro-optical panel 2. In addition, one substrate surface 62 a of the end 621 of the first flexible wiring substrate 62 is connected to the first terminal 29 a, and the first flexible wiring substrate 62 is electro-optically similar to the first flexible wiring substrate 61. An extending portion 622 extending in a direction away from the panel 2 is provided.

  In this way, the first flexible wiring board 60 (first flexible wiring boards 61 and 62) is connected to the first side 2a of the electro-optical panel 2, and one of the extending portions 612 of the first flexible wiring board 61 is An integrated circuit 91 (integrated circuit 90) is mounted on the substrate surface 61a. Further, in the extending portion 622 of the first flexible wiring board 62, the integrated circuit 92 (integrated circuit 90) is mounted on one of the board surfaces 62a.

(Configuration of second flexible wiring board 70)
In the electro-optical panel 2, a second flexible wiring board 70 is connected to a side different from the first side 2a. In this embodiment, in the electro-optical panel 2, a second flexible wiring board 70 is connected to a second side 2b located on the opposite side of the first side 2a. More specifically, on the second side 2b side of the electro-optical panel 2, a second terminal 28 is formed on the surface of the protruding portion 21f of the first substrate 21 on the second substrate 22 side, and the second terminal 28 is connected to one substrate surface 70 a of the second flexible wiring substrate 70.

  Here, like the first flexible wiring board 60, the second flexible wiring board 70 is drawn out from the first side 2 a side of the electro-optical panel 2. More specifically, the second flexible wiring board 70 includes a first portion 71 extending from the second side 2b of the electro-optical panel 2 toward the side opposite to the first side 2a, and a tip of the first portion 71. A second portion 72 extending along the second side 2b from the tip of the second portion 72 toward the one side of the second side 2b, and the first side 2a along the third side 2c of the electro-optical panel 2 from the tip of the second portion 72. And a third portion 73 extending toward the side. In addition, in the second flexible wiring board 70, the first portion 71, the second portion 72, and the third portion 73 are all configured so that the thickness direction of the second flexible wiring substrate 70 is the thickness direction of the electro-optical panel 2 (the first portion). The first substrate 21 and the second substrate 22) are directed in the thickness direction, and one substrate surface 70a is directed to one side L1 (side on which the frame 30 is located). In the present embodiment, the second portion 72 and the third portion 73 have the same width and are narrower than the first portion 71.

(Configuration of frame 30)
FIG. 5 is an enlarged perspective view showing the vicinity of the substrate housing groove 36 of the electro-optic module 10 shown in FIG.

  1, 2, 3 and 5, the frame 30 is a plate-like member having a size larger than that of the electro-optical panel 2, and is made of metal or a resin having high heat dissipation. In this embodiment, the frame 30 is made of metal such as aluminum. The frame 30 has a panel support portion 31 that supports the electro-optical panel 2 from one side L1. Further, the frame 30 has a plate-like heat radiating portion 311 extending from the panel support portion 31 in a direction overlapping the extending portions 612 and 622 of the first flexible wiring boards 61 and 62.

  The panel support portion 31 is formed in a rectangular frame shape having an opening 310 that overlaps the display region 2p, and on the second side 2b, the third side 2c, and the fourth side 2d of the side surface 20 of the electro-optical panel 2. It has the wall parts 32, 33, and 34 which oppose the located part. In the present embodiment, the wall portion 32 faces the portion of the side surface 20 of the electro-optical panel 2 that is located at the third side 2c, and the wall portion 33 is the fourth side 2d of the side surface 20 of the electro-optical panel 2. The wall 34 faces the portion of the side surface 20 of the electro-optic panel 2 that is located on the second side 2b.

  In the panel support portion 31, seat portions 391, 392, 393, and 394 for fixing the electro-optic module 10 to the electronic device are formed at positions corresponding to the four corners, and the seat portions 391, 392, and 393 are formed. 394 is formed with screw holes 391a, 392a, 393a, 394a. Here, the seat portion 393 and the seat portion 394 formed on the second side 2b side of the electro-optical panel 2 are separated in the extending direction of the wall portion 34, and the other side L2 of the wall portion 34 is separated from the seat portion 394. A recess 349 is formed between the portion 393 and the seat portion 394. Further, the seat portion 391 and the seat portion 392 formed on the first side 2a side of the electro-optical panel 2 are separated in the extending direction (X direction) of the first side 2a of the electro-optical panel 2, and the seat The first flexible wiring board 60 is drawn out in the direction away from the electro-optical panel 2 in the Y direction by using the space between the portion 391 and the seat portion 392.

  Corresponding to the configuration of the electro-optical panel 2, the inner surfaces of the walls 32, 33, and 34 receive the end of the first substrate 21 on the one side L1 when the electro-optical panel 2 is supported from the one side L1. A first step portion 351 and a second step portion 352 that receives the end portion of the second substrate 22 on one side L1 are formed. Further, when the frame 30 supports the electro-optical panel 2 from the one side L 1, the second light transmitting plate 24 is positioned inside the opening 310. In the panel support portion 31 configured as described above, the inner surfaces of the walls 32, 33, and 34 and the side surface 20 of the electro-optical panel 2 are fixed by an adhesive.

(Configuration of Substrate Housing Groove 36)
In the electro-optic module 10 of this embodiment, the case 3 is formed with a substrate accommodation groove 36 for accommodating the second flexible wiring substrate 70. In this embodiment, the substrate accommodation groove 36 corresponds to the configuration of the second flexible wiring board 70, and includes a first part accommodation part 361 that accommodates the first part 71 of the second flexible wiring board 70, and a second part 72. A second part accommodating part 362 for accommodating the third part accommodating part 363 for accommodating the third part 73 is provided. More specifically, the first partial housing portion 361 is formed so as to open toward the inner surface and the other side L2 in the wall portion 34 facing the second side 2b of the electro-optical panel 2. The first portion 71 of the flexible wiring board 70 is accommodated. The second partial housing portion 362 is open toward the other side L2 in the wall portion 34 facing the second side 2b of the electro-optical panel 2, and extends along the second side 2b. 2 The second portion 72 of the flexible wiring board 70 is accommodated. The third portion housing portion 363 opens toward the other side L2 in the wall portion 32 facing the third side 2c of the electro-optical panel 2, and is electro-optic along the third side 2c of the electro-optical panel 2. It extends toward the first side 2 a of the panel 2 and accommodates the third portion 73 of the second flexible wiring board 70. The third portion accommodating portion 363 is formed up to the end portion on the first side 2a side of the electro-optical panel 2 in the wall portion 32, and the third portion 73 of the second flexible wiring board 70 is the third portion. It is pulled out from the housing portion 363 in a direction away from the electro-optical panel 2.

  Here, in the second flexible wiring board 70, the first portion 71, the second portion 72, and the third portion 73 all have the thickness direction of the second flexible wiring substrate 70 in the thickness direction of the electro-optical panel 2 (first substrate 21. And in the thickness direction of the second substrate 22), the substrate is accommodated in the substrate accommodating groove 36.

  In the present embodiment, the frame 30 is formed with the same structure on the fourth side 2d side of the electro-optical panel 2 in addition to the third side 2c side of the electro-optical panel 2.

(Main effects of this form)
As described above, the electro-optical module 10 of the present embodiment includes the electro-optical panel 2, the first flexible wiring board 60 connected to the first side 2 a of the electro-optical panel 2, and the second side of the electro-optical panel 2. 2b, the first flexible wiring board 60 and the second flexible wiring board 70 are both electro-optical panels from the first side 2a side of the electro-optical panel 2. 2 is pulled out to the opposite side. For this reason, it is easy to electrically connect the first flexible wiring board 60 and the second flexible wiring board 70 to the outside.

  In addition, since the second flexible wiring board 70 is pulled out from the first side 2a through the board housing groove 36 formed in the frame 30 constituting the case 3, when the electro-optic module 10 is assembled, 2 The position of the flexible wiring board 70 is defined. For this reason, it is possible to avoid interference between the second flexible wiring board 70 and other members without performing a laborious process such as bonding the first flexible wiring board 60 and the second flexible wiring board 70. Easy. Therefore, even when the first flexible wiring board 60 and the second flexible wiring board 70 are connected to different sides (the first side 2a and the second side 2b) of the electro-optical panel 2, the electro-optic module 10 is efficiently assembled. Can do.

  In the electro-optical panel 2, the second side 2b is located on the opposite side to the first side 2a. For this reason, since the routing distance of the second flexible wiring board 70 is long, it takes a lot of time and effort to avoid interference between the second flexible wiring board 70 and other members. Even in this case, since it does not take much time to avoid interference between the second flexible wiring board 70 and other members, the electro-optic module 10 can be assembled efficiently.

  The substrate accommodation groove 36 is formed on both the third side 2c side and the fourth side 2d side with respect to the connection position between the electro-optic panel 2 and the second flexible wiring board 70. For this reason, the second flexible wiring board 70 is extended in the direction of the first side 2a (the side of the third side 2c and the side of the fourth side 2d depending on the orientation when the electro-optic module 10 is mounted on an electronic device or the like. It is possible to optimize from which side of the side). For example, in the projection display device 110 described later with reference to FIG. 10, the drawing direction of the second flexible wiring board 70 can be reversed between the red electro-optical module 10 </ b> R and the blue electro-optical module 10 </ b> B. . As a result, in both of the red electro-optical module 10R and the blue electro-optical module 10B, the second flexible wiring board 70 can be pulled out on the side opposite to the projection optical system 118. Therefore, both the red electro-optic module 10R and the blue electro-optic module 10B have advantages such that the projection optical system 118 and the second flexible wiring board 70 do not interfere with each other.

(Modification of Embodiment 1)
In the above embodiment, the substrate accommodation groove 36 includes the first partial accommodation portion 361, the second partial accommodation portion 362, and the third partial accommodation portion 363. However, the substrate accommodation groove 36 is only the second partial accommodation portion 362. Alternatively, a configuration having only the third partial accommodating portion 363 may be employed.

[Embodiment 2]
FIG. 6 is a perspective view of the second flexible wiring board 70 and the like used in the electro-optic module 10 according to Embodiment 2 of the present invention as viewed from the second board 22 side. In FIG. 6, the shape of the second flexible wiring board 70 before being bent is indicated by a one-dot chain line. In addition, since the basic configuration of the present embodiment 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, in the second flexible wiring board 70, all of the first portion 71, the second portion 72, and the third portion 73 have the thickness direction of the second flexible wiring substrate 70 changed to the electro-optical panel 2 (first The first substrate 21 and the second substrate 22) are accommodated in the substrate accommodation groove 36 in the state of being directed in the thickness direction. On the other hand, in this embodiment, as shown in FIG. 6, the second flexible wiring board 70 is bent between the second portion 72 and the third portion 73, and the one surface 73 b of the third portion 73 is electro-optically. The 1st bending part 76 made to face the part located in the 3rd edge | side 2c among the side surfaces 20 of the panel 2 is provided.

  Even in such a configuration, in the substrate accommodation groove 36 shown in FIG. 5, the first portion 71 is accommodated in the first partial accommodating portion 361, the second portion 72 is accommodated in the second partial accommodating portion 362, and the third partial accommodating portion 363. The third portion 73 is accommodated in the container. At this time, the third portion 73 is bent at the first bent portion 76 so as to face the portion located on the third side 2c of the side surface 20 of the electro-optical panel 2, so refer to FIG. The dimension (width dimension) in the extending direction of the first side 2a of the third part accommodating portion 363 described can be reduced. Therefore, since the dimension (width dimension) in the extending direction (X direction) of the first side 2a occupied by the electro-optical panel 2 and the second flexible wiring board 70 can be reduced, the electro-optical module 10 can be downsized. be able to.

(Modification of Embodiment 2)
In the above embodiment, the substrate housing groove 36 includes the first partial housing portion 361, the second partial housing portion 362, and the third partial housing portion 363. It may be adopted.

[Embodiment 3]
FIG. 7 is a perspective view of the second flexible wiring board 70 and the like used in the electro-optic module 10 according to Embodiment 3 of the present invention as viewed from the second board 22 side. In FIG. 7, the shape of the second flexible wiring board 70 before being bent is indicated by a one-dot chain line. In addition, since the basic configuration of the present embodiment 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 second embodiment, the second flexible wiring board 70 is bent at the first bent portion 76 so as to face the portion of the side surface 20 of the electro-optical panel 2 located at the third side 2c. On the other hand, in this embodiment, as shown in FIG. 7, the second flexible wiring board 70 is bent between the first portion 71 and the second portion 72, and the one surface 72 b of the second portion 72 is electro-optically. A second bent portion 77 is provided to face a portion located on the second side 2b in the side surface 20 of the panel 2. Further, the second flexible wiring board 70 is bent between the second portion 72 and the third portion 73, and the one surface 73 b of the third portion 73 is positioned on the third side 2 c of the side surface 20 of the electro-optical panel 2. The 1st bending part 76 which is made to face the part to perform is provided.

  Even in such a configuration, in the substrate accommodation groove 36 shown in FIG. 5, the first portion 71 is accommodated in the first partial accommodating portion 361, the second portion 72 is accommodated in the second partial accommodating portion 362, and the third partial accommodating portion 363. The third portion 73 is accommodated in the container. At this time, the third portion 73 is bent at the first bent portion 76 so as to face the portion located on the third side 2c of the side surface 20 of the electro-optical panel 2, so refer to FIG. The dimension (width dimension) in the extending direction (X direction) of the first side 2a of the third part accommodating portion 363 described can be reduced. Therefore, since the dimension (width dimension) in the extending direction of the first side 2a occupied by the electro-optical panel 2 and the second flexible wiring board 70 can be reduced, the electro-optical module 10 can be reduced in size. Further, the second portion 72 is bent at the second bent portion 77 so as to face the portion located on the second side 2b of the side surface 20 of the electro-optical panel 2, and will be described with reference to FIG. Thus, the dimension (width dimension) in the extending direction (Y direction) of the third side 2c and the fourth side 2d of the second partial housing portion 362 can be reduced. Therefore, the dimension in the extending direction (X direction) of the first side 2a occupied by the electro-optical panel 2 and the second flexible wiring board 70, and the dimension in the extending direction (Y direction) of the third side 2c and the fourth side 2d. Therefore, the electro-optic module 10 can be downsized.

(Modification of Embodiment 3)
In the above embodiment, the substrate accommodation groove 36 includes the first partial accommodation portion 361, the second partial accommodation portion 362, and the third partial accommodation portion 363. However, the second partial accommodation portion 362 and the third partial accommodation portion are provided. A configuration having only 363 may be employed.

[Embodiment 4]
FIG. 8 is a perspective view of the second flexible wiring board 70 and the like used in the electro-optic module 10 according to Embodiment 4 of the present invention, as viewed from the second board 22 side. In FIG. 8, the shape of the second flexible wiring board 70 before being bent is indicated by an alternate long and short dash line. In addition, since the basic configuration of the present embodiment is the same as that of the first embodiment, common portions are denoted by the same reference numerals and description thereof is omitted.

  In this embodiment, the depth of the second portion accommodating portion 362 shown in FIG. 5 changes in the extending direction (X direction), and the second portion 72 of the second flexible wiring board 70 is the bottom portion of the second portion accommodating portion 362. Extends along. For this reason, the position of the second portion 72 of the second flexible wiring board 70 in the thickness direction of the electro-optical panel 2 is changed in the extending direction (X direction). As a result, the second flexible wiring board 70 is The first substrate 21 overlaps the protruding portion 21g from the second substrate 22. According to this configuration, the third portion 73 of the second flexible wiring board 70 is disposed within the range of the width direction of the electro-optical panel 2 in the extending direction (X direction) of the first side 2 a of the electro-optical panel 2. Therefore, the electro-optic module 10 can be downsized.

  In the above-described embodiment, the configuration of the second partial accommodating portion 362 in the substrate accommodating groove 36 has been described. However, a third partial accommodating portion 363 that accommodates the third portion 73 may be provided on the frame 30. Further, as described in the second embodiment and the like, the second flexible wiring board 70 is bent between the second portion 72 and the third portion 73, and the one surface 73 b of the third portion 73 is formed on the electro-optical panel 2. A first bent portion 76 that faces the portion located on the third side 2 c in the side surface 20 may be provided, and the third portion 73 may be accommodated in the third portion accommodating portion 363.

[Embodiment 5]
FIG. 9 is an explanatory diagram of the electro-optic module 10 according to Embodiment 5 of the present invention. FIGS. 9A and 9B are perspective views of the second flexible wiring board 70 and the like viewed from the second substrate 22 side. FIG. 3 is a perspective view of the frame 30 when viewed from the side opposite to the electro-optical panel 2.

  In the first embodiment, the substrate accommodation groove 36 is formed on the surface of the frame 30 on the electro-optical panel 2 side. However, in this embodiment, the substrate accommodation groove 36 is formed in the case 3 (frame 30 as shown in FIG. 9). ) On the back surface 37a side opposite to the electro-optical panel 2 side of the bottom plate portion 37 that overlaps the electro-optical panel 2 in plan view from the second side 2b side of the electro-optical panel 2 to the first side 2a side. It extends towards. The second flexible wiring board 70 is bent toward the back surface 37 a from the connection position with the electro-optical panel 2 and is received in the board receiving groove 36.

  Such a configuration is applied, for example, when the electro-optical panel 2 is a reflective liquid crystal panel. In this case, the pixel electrode 21s shown in FIG. 4 is made of a reflective metal such as aluminum urine. For this reason, as indicated by an arrow L3 in FIG. 9, the light source light incident from the second substrate 22 side is reflected by the first substrate 21 side and emitted from the second substrate 22 side. For this reason, the electro-optical panel 2 is arranged with the first substrate 21 facing the frame 30. Also, a plurality of protruding fins 38 extending in parallel from the second side 2b side of the electro-optical panel 2 toward the first side 2a side are arranged in parallel on the back surface 37a side of the case 3 (frame 30). The substrate housing groove 36 is formed in any one of the recesses 38 a formed between adjacent fins 38 among the plurality of fins 38. For example, among the plurality of fins 38, any of the plurality of recesses 38 a formed between adjacent fins 38 is used as the substrate accommodation groove 36. In this embodiment, among the plurality of recesses 38a, the interval between the fins in which the substrate accommodation grooves 36 are formed is wider than the interval between the other fins. Such a configuration can be realized by removing any one of the fins 38 arranged at equal intervals.

  According to such a configuration, the second flexible wiring board 70 can be disposed within the range of the electro-optical panel 2 in the width direction (X direction), so that the electro-optical module 10 can be reduced in size. Further, in this embodiment, since the substrate housing groove 36 is formed by using the recesses 38 a formed between the fins 38, even when the fins 38 are formed on the back surface 37 a of the bottom plate part 37, The second flexible wiring board 70 can be passed through the back surface 37a side. In this embodiment, the interval between the fins 38 in which the substrate accommodation grooves 36 are formed is wider than the interval between the other fins 38. For this reason, even when the space | interval of the fin 38 is narrow, the 2nd flexible wiring board 70 can be passed to the back surface 37a side of the baseplate part 37. FIG.

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

[Example of mounting on electronic devices]
FIG. 10 is a schematic configuration diagram of a projection display device (electronic apparatus) using the electro-optic module 10 to which the present invention is applied. In the following description, a plurality of electro-optic modules 10 to which light in different wavelength ranges are supplied are used. However, the electro-optic module 10 to which the present invention is applied is used for any of the electro-optic modules 10. It has been.

  A projection type display device 110 shown in FIG. 10 is a liquid crystal projector using the transmission type electro-optic module 10, and irradiates light onto a projection target member 111 made of a screen or the like to display an image. The projection display device 110 includes an illumination device 160 along the device optical axis L, a plurality of electro-optic modules 10 (liquid crystal light valves 115 to 117) to which light emitted from the illumination device 160 is supplied, and a plurality of A cross dichroic prism 119 (light combining optical system) that combines and emits light emitted from the electro-optic module 10 and a projection optical system 118 that projects light combined by the cross dichroic prism 119 are provided. In addition, the projection display device 110 includes dichroic mirrors 113 and 114 and a relay system 120. In the projection display device 110, the electro-optic module 10 and the cross dichroic prism 119 constitute an optical unit 200.

  In the illumination device 160, along the device optical axis L, a light source unit 161, a first integrator lens 162 composed of a lens array such as a fly-eye lens, a second integrator lens 163 composed of a lens array such as a fly-eye lens, and a polarization conversion element 164 and a condenser lens 165 are arranged in this order. The light source unit 161 includes a light source 168 that emits white light including red light R, green light G, and blue light B, and a reflector 169. The light source 168 is configured by an ultra-high pressure mercury lamp or the like, and the reflector 169 has a parabolic cross section. The first integrator lens 162 and the second integrator lens 163 make the illuminance distribution of the light emitted from the light source unit 161 uniform. The polarization conversion element 164 turns the light emitted from the light source unit 161 into polarized light having a specific vibration direction such as s-polarized light.

  The dichroic mirror 113 transmits the red light R included in the light emitted from the illumination device 160 and reflects the green light G and the blue light B. The dichroic mirror 114 transmits the blue light B and reflects the green light G out of the green light G and the blue light B reflected by the dichroic mirror 113. As described above, the dichroic mirrors 113 and 114 constitute a color separation optical system that separates the light emitted from the illumination device 160 into red light R, green light G, and blue light B.

  The liquid crystal light valve 115 is a transmissive liquid crystal device that modulates the red light R transmitted through the dichroic mirror 113 and reflected by the reflection mirror 123 in accordance with an image signal. The liquid crystal light valve 115 includes a λ / 2 phase difference plate 115a, a first polarizing plate 115b, an electro-optic module 10 (red electro-optic module 10R), and a second polarizing plate 115d. Here, the red light R incident on the liquid crystal light valve 115 remains as s-polarized light because the polarization of the light does not change even if it passes through the dichroic mirror 113.

  The λ / 2 phase difference plate 115a is an optical element that converts s-polarized light incident on the liquid crystal light valve 115 into p-polarized light. The first polarizing plate 115b is a polarizing plate that blocks s-polarized light and transmits p-polarized light. The electro-optic module 10 (red electro-optic module 10R) is configured to convert p-polarized light into s-polarized light (circularly polarized light or elliptically polarized light in the case of halftone) by modulation according to an image signal. The second polarizing plate 115d is a polarizing plate that blocks p-polarized light and transmits s-polarized light. Accordingly, the liquid crystal light valve 115 modulates the red light R according to the image signal, and emits the modulated red light R toward the cross dichroic prism 119. The λ / 2 phase difference plate 115a and the first polarizing plate 115b are arranged in contact with a light-transmitting glass plate 115e that does not convert the polarization, and the λ / 2 phase difference plate 115a and the first polarizing plate 115b are arranged. Distortion due to heat generation can be avoided.

  The liquid crystal light valve 116 is a transmissive liquid crystal device that modulates green light G reflected by the dichroic mirror 114 after being reflected by the dichroic mirror 113 in accordance with an image signal. Similarly to the liquid crystal light valve 115, the liquid crystal light valve 116 includes a first polarizing plate 116b, an electro-optic module 10 (green electro-optic module 10G), and a second polarizing plate 116d. Green light G incident on the liquid crystal light valve 116 is s-polarized light that is reflected by the dichroic mirrors 113 and 114 and then incident. The first polarizing plate 116b is a polarizing plate that blocks p-polarized light and transmits s-polarized light. The electro-optic module 10 (green electro-optic module 10G) is configured to convert s-polarized light into p-polarized light (circularly polarized light or elliptically polarized light in the case of halftone) by modulation according to an image signal. The second polarizing plate 116d is a polarizing plate that blocks s-polarized light and transmits p-polarized light. Therefore, the liquid crystal light valve 116 modulates the green light G according to the image signal, and emits the modulated green light G toward the cross dichroic prism 119.

  The liquid crystal light valve 117 is a transmissive liquid crystal device that modulates the blue light B reflected by the dichroic mirror 113, transmitted through the dichroic mirror 114, and then passed through the relay system 120 in accordance with an image signal. Similarly to the liquid crystal light valves 115 and 116, the liquid crystal light valve 117 includes a λ / 2 retardation film 117a, a first polarizing plate 117b, an electro-optic module 10 (blue electro-optic module 10B), and a second polarizing plate 117d. I have. Since the blue light B incident on the liquid crystal light valve 117 is reflected by the dichroic mirror 113 and transmitted through the dichroic mirror 114 and then reflected by the two reflection mirrors 125a and 125b of the relay system 120, it is s-polarized light.

  The λ / 2 phase difference plate 117a is an optical element that converts s-polarized light incident on the liquid crystal light valve 117 into p-polarized light. The first polarizing plate 117b is a polarizing plate that blocks s-polarized light and transmits p-polarized light. The electro-optic module 10 (blue electro-optic module 10B) is configured to convert p-polarized light into s-polarized light (circularly polarized light or elliptically polarized light in the case of halftone) by modulation according to an image signal. The second polarizing plate 117d is a polarizing plate that blocks p-polarized light and transmits s-polarized light. Accordingly, the liquid crystal light valve 117 modulates the blue light B according to the image signal, and emits the modulated blue light B toward the cross dichroic prism 119. The λ / 2 phase difference plate 117a and the first polarizing plate 117b are arranged in contact with the glass plate 117e.

  The relay system 120 includes relay lenses 124a and 124b and reflection mirrors 125a and 125b. The relay lenses 124a and 124b are provided to prevent light loss due to the long optical path of the blue light B. The relay lens 124a is disposed between the dichroic mirror 114 and the reflection mirror 125a. The relay lens 124b is disposed between the reflection mirrors 125a and 125b. The reflection mirror 125a reflects the blue light B transmitted through the dichroic mirror 114 and emitted from the relay lens 124a toward the relay lens 124b. The reflection mirror 125b reflects the blue light B emitted from the relay lens 124b toward the liquid crystal light valve 117.

  The cross dichroic prism 119 is a color combining optical system in which two dichroic films 119a and 119b are arranged orthogonally in an X shape. The dichroic film 119a is a film that reflects blue light B and transmits green light G, and the dichroic film 119b is a film that reflects red light R and transmits green light G. Accordingly, the cross dichroic prism 119 combines the red light R, the green light G, and the blue light B that are modulated by the liquid crystal light valves 115 to 117, and emits the resultant light toward the projection optical system 118.

  Note that light incident on the cross dichroic prism 119 from the liquid crystal light valves 115 and 117 is s-polarized light, and light incident on the cross dichroic prism 119 from the liquid crystal light valve 116 is p-polarized light. Thus, by making the light incident on the cross dichroic prism 119 into different types of polarized light, the light incident from the liquid crystal light valves 115 to 117 can be synthesized in the cross dichroic prism 119. Here, in general, the dichroic films 119a and 119b are excellent in the reflection characteristics of s-polarized light. For this reason, red light R and blue light B reflected by the dichroic films 119a and 119b are s-polarized light, and green light G transmitted through the dichroic films 119a and 119b is p-polarized light. The projection optical system 118 has a projection lens (not shown), and projects the light combined by the cross dichroic prism 119 onto a projection target 111 such as a screen.

(Other projection display devices)
In the projection type display device, the transmission type electro-optic module 10 is used. However, the reflection type electro-optic module 10 may be used to constitute the projection type display device. In the projection display device, an LED light source that emits light of each color may be used as the light source unit, and the color light emitted from the LED light source may be supplied to another liquid crystal device. .

(Other electronic devices)
As for the electro-optic module 10 to which the present invention is applied, in addition to the electronic devices described above, mobile phones, personal digital assistants (PDAs), digital cameras, liquid crystal televisions, car navigation devices, video phones, POS terminals In addition, it may be used as a direct-view display device in an electronic device such as a device provided with a touch panel.

2 .. Electro-optical panel, 2a .. 1st side, 2b .. 2nd side, 2c .. 3rd side, 2d .. 4th side, 2p .. display area, 3 .. case, 10. Optical module 20 ·· Side, 21 ·· First substrate, 21s ·· Pixel electrode, 22 ·· Second substrate, 22s ·· Common electrode, 23 ·· First translucent plate, 24 ·· Second translucent Plate 26, Electro-optical material layer 28, Second terminal 29, 29a, 29b First terminal 30, Frame 31 Panel support 32, 33, 34 Wall 36 .. Substrate housing groove, 37 .. Bottom plate part, 37 a .. Back surface, 38 .. Fin, 38 a .. Recessed part, 60, 61, 62 .. First flexible wiring board, 70 .. Second flexible wiring board, 71 .. First part 72 .. Second part 73 .. Third part 76 .. First bent part 77. The second bent portion, 110 ... projection display apparatus, 361 a first portion accommodating portion .., 362 ... second partial housing portion, 363 ... third portion accommodating portion

Claims (12)

An electro-optic panel;
A first flexible wiring board connected to the first side of the electro-optic panel;
A second flexible wiring board connected to a second side different from the first side of the electro-optic panel;
A case for accommodating the electro-optical panel;
Have
The case is formed with a substrate housing groove for housing the second flexible wiring substrate,
The electro-optic module, wherein the second flexible wiring board is pulled out from the first side through the substrate housing groove.   2. The electro-optic module according to claim 1, wherein the second side is located on a side opposite to the first side in the electro-optic panel. The second flexible wiring board includes a first portion extending from the second side toward the opposite side of the first side, and a second portion extending from the tip of the first portion along the second side. The side of the first side along the third side connecting the two parts and the one side end of the first side of the electro-optic panel and the one side end of the second side from the tip of the second part A third portion extending toward the
The substrate accommodation groove extends along the second side to accommodate the second part, and the substrate accommodation groove extends along the third side to accommodate the third part. The electro-optic module according to claim 2, comprising at least one of the three-part housing portions.   The electro-optic module according to claim 3, wherein the substrate housing groove includes both the second partial housing portion and the third partial housing portion.   The substrate receiving groove is on the third side, and on the other side end of the first side and the other side of the second side with respect to the connection position between the electro-optical panel and the second flexible wiring board. The electro-optic module according to claim 3, wherein the electro-optic module is provided on both sides of the fourth side connecting the end portion.   The second flexible wiring board is bent between the second portion and the third portion, and the first surface of the third portion is directed to the side of the side of the third side of the electro-optic panel. The electro-optic module according to claim 3, further comprising a bent portion.   The second flexible wiring board is bent between the first part and the second part so that one surface of the second part faces the side of the electrooptic panel on the side of the first side. The electro-optic module according to claim 3, further comprising a bent portion. The depth of the second portion accommodating portion changes in the extending direction,
The second part extends along the bottom of the second part accommodating part,
The electro-optic module according to claim 3, wherein the third portion overlaps between a display area of the electro-optic panel and the third side in a plan view. The substrate housing groove is formed on the back surface side of the bottom plate portion that overlaps with the electro-optical panel of the case in a plan view from the second side to the first side. Extending towards
3. The electro-optic module according to claim 1, wherein the second flexible wiring board is bent toward the back surface from a connection position with the electro-optic panel and accommodated in the substrate accommodation groove. 4. . The electro-optical panel is a reflective electro-optical panel or a self-luminous electro-optical panel that emits display light toward a side opposite to the bottom plate side.
On the back side of the case, a plurality of protruding fins extending in parallel from the second side toward the first side are formed,
The electro-optic module according to claim 9, wherein any one of the concave portions formed between adjacent fins among the plurality of fins is used as the substrate housing groove.   The electro-optic module according to claim 10, wherein, in the plurality of fins, an interval between fins in which the substrate receiving grooves are formed is wider than an interval between other fins.   An electronic apparatus comprising the electro-optic module according to claim 1.

Images