JP2012209407A - Flexible wiring board, electro-optical device, manufacturing method of electro-optical device and electronic apparatus - Google Patents

Abstract

To provide a flexible wiring board, an electro-optical device, a method for manufacturing an electro-optical device, and an electronic apparatus capable of facilitating inventory management and suppressing the man-hours and costs.
A flexible wiring board connected to a liquid crystal panel is opposed to an external connection terminal part having a plurality of connection terminal parts arranged along a first side of the flexible wiring board and a first side. A first FPC connection terminal portion 45 having a plurality of first connection terminals disposed between the second side and the external connection terminal portion 52 and electrically connected to the plurality of connection terminal portions, respectively, The first FPC connection terminal unit 45 is disposed between the first FPC connection terminal unit 45 and is electrically connected to the first FPC connection terminal unit 45, and has a plurality of second connection terminals smaller in number than the plurality of first connection terminals. 2 FPC connection terminal part 46.
[Selection] Figure 5

Description

  The present invention relates to a flexible wiring board, an electro-optical device, a method for manufacturing the electro-optical device, and an electronic apparatus.

  As one of the electro-optical devices, for example, there is a TFT (Thin Film Transistor) active matrix driving type liquid crystal device used as a light valve of a liquid crystal projector. The liquid crystal device includes a liquid crystal panel and FPC (Flexible Printed Circuits) for connecting the liquid crystal panel to an external circuit.

  Specifically, the connection terminal portion of the liquid crystal panel to which the FPC is connected has, for example, a plurality of connection terminals with different arrangement pitches or the like depending on the type of the liquid crystal panel. Therefore, it is necessary to make a dedicated FPC suitable for the connection terminal portion for each type of liquid crystal panel. Therefore, there are problems that inventory management is difficult because several types of FPC are managed, and that it is expensive because a dedicated FPC is produced.

  Therefore, for example, Patent Document 1 discloses a printed circuit board in which test pads having a plurality of pitches and widths are provided on a substrate, and the respective test pads are connected. This printed circuit board is used for evaluation and analysis of semiconductor devices.

JP-A-11-297754

  The printed circuit board disclosed in Patent Document 1 has a wiring for connecting the same number of test pads. On the other hand, there are cases where the number of connection terminals varies depending on the model of the liquid crystal panel, and the structure of the FPC that can be connected to a plurality of types of liquid crystal panels with different connection terminal arrangement specifications has not been disclosed.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A flexible wiring board according to this application example includes an external connection terminal portion having a plurality of external connection terminals arranged along the first side of the board, and a first surface facing the first side of the board. A first connection terminal portion having a plurality of first connection terminals disposed between two sides and the external connection terminal portion and electrically connected to the plurality of external connection terminals, respectively, and the second of the substrate A plurality of second connection terminals arranged between a side and the first connection terminal portion, electrically connected to the first connection terminal portion, and having a number smaller than the number of terminals of the plurality of first connection terminals And a second connection terminal portion having the following.

  According to this configuration, since one flexible wiring board includes at least the first connection terminal portion and the second connection terminal portion having different numbers of terminals, for example, when connecting the flexible wiring substrate to the electro-optical panel, A plurality of types of electro-optical panels and flexible wiring boards can be connected by selecting the first connection terminal portion or the second connection terminal portion in accordance with the number of terminals of the optical panel. Thereby, it is possible to cope with one flexible wiring board without creating a flexible wiring board exclusively for the type of electro-optical panel. As a result, since a dedicated flexible wiring board is not created, inventory management can be facilitated, and man-hours and costs can be reduced.

  Application Example 2 In the flexible wiring board according to the application example described above, it is preferable that some of the plurality of first connection terminals are not electrically connected to the plurality of second connection terminals.

  According to this configuration, it is possible to cope with an electro-optical panel having an irregular connection terminal arrangement.

  Application Example 3 In the flexible wiring board according to the application example described above, it is preferable that an external cutting reference for separating the second connection terminal portion is provided on the flexible wiring board.

  According to this configuration, when the flexible wiring and the electro-optical panel are connected using the first connection terminal portion, the unnecessary portion (the region of the second connection terminal portion) is based on the external cutting reference (positioning). ), The first connection terminal portion of the flexible wiring board can be easily arranged on the terminal portion of the electro-optical panel.

  Application Example 4 An electro-optical device according to this application example includes the flexible wiring board described above and an electro-optical panel electrically connected to the flexible wiring board.

  According to this configuration, it is possible to provide an electro-optical device in which the electro-optical panel and the flexible wiring board are electrically connected using the same flexible wiring board even if the types of the electro-optical panels are different. .

Application Example 5 An electro-optical device manufacturing method according to this application example is an electro-optical device manufacturing method including an electro-optical panel and a flexible wiring board electrically connected to the electro-optical panel. ,
The electro-optical panel is provided with a panel connection terminal portion having a plurality of panel connection terminals for electrical connection with the flexible wiring board, and the flexible wiring board includes a first of the flexible wiring boards. An external connection terminal part having a plurality of external connection terminals arranged along one side, and a second side opposite to the first side of the flexible wiring board and the external connection terminal part, A first connection terminal portion having a plurality of first connection terminals electrically connected to a plurality of external connection terminals, respectively, and disposed between the second side of the flexible wiring board and the first connection terminal portion. A second connection terminal portion electrically connected to the first connection terminal portion and having a plurality of second connection terminals less than the number of terminals of the plurality of first connection terminals. And selecting one of the first connection terminal portion and the second connecting terminal portion, and having a bonding step of bonding with said panel connecting terminal portion electrically.

  According to this method, since one flexible wiring board is provided with at least the first connection terminal portion and the second connection terminal portion having different numbers of terminals, the number of terminals can be adjusted according to the number of terminals of the panel connection terminal portion of the electro-optical panel. One connection terminal part or the second connection terminal part can be selected, and the electro-optical panel and the flexible wiring board can be electrically joined. Thereby, it is possible to cope with one flexible wiring board without creating a flexible wiring board exclusively for the type of electro-optical panel.

  Application Example 6 In the method of manufacturing the electro-optical device according to the application example described above, when the connection terminal portion connected to the electro-optical panel is selected as the first connection terminal portion, the second connection is performed before the bonding step. It is preferable to have the cutting process which cut | disconnects a connection terminal part.

  According to this method, when the flexible wiring board and the electro-optical panel are connected using the first connection terminal portion, the first connection is achieved by cutting the second connection terminal portion (the tip side from the first connection terminal portion). A terminal part is arrange | positioned at the edge part of a flexible wiring board. Therefore, the electro-optical panel and the flexible wiring board can be easily connected and can be electrically connected to each other.

  Application Example 7 An electronic apparatus according to this application example includes the above-described electro-optical device.

  According to this configuration, since the above-described electro-optical device is provided, inventory management of the flexible wiring board can be simplified, and the cost can be suppressed, and an electronic apparatus having high cost performance can be provided.

FIG. 3 is a perspective view schematically showing a configuration of a liquid crystal device as an electro-optical device. FIG. 2 is a schematic plan view showing a structure of a liquid crystal panel that constitutes a liquid crystal device. The schematic cross section which follows the AA 'line of the liquid crystal panel shown in FIG. FIG. 3 is an equivalent circuit diagram illustrating an electrical configuration of the liquid crystal panel. The schematic plan view which shows the connection state of the liquid crystal panel which comprises a liquid crystal device, and a flexible wiring board. The exploded view which shows the state before the connection of a liquid crystal panel and a flexible wiring board. The schematic plan view which shows the specific example of the terminal arrangement | sequence in a flexible wiring board. 5 is a flowchart showing a method for manufacturing a liquid crystal device in the order of steps. The schematic plan view which shows a one part process among the manufacturing methods of a liquid crystal device. The schematic plan view which shows a one part process among the manufacturing methods of a liquid crystal device. FIG. 3 is a schematic diagram illustrating a configuration of a liquid crystal projector as an example of an electronic apparatus. FIG. 9 is a schematic plan view illustrating a structure of a modified example of the liquid crystal device. The schematic plan view which shows the structure of the modification of a flexible wiring board.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the drawings. Note that the drawings to be used are appropriately enlarged or reduced so that the part to be described can be recognized. In the present embodiment, a TFT (Thin Film Transistor) active matrix driving type liquid crystal device used as a light valve in a liquid crystal projector that is a projection type image device will be described as an example of an electro-optical device.

<Configuration of electro-optical device>
FIG. 1 is a perspective view schematically showing a configuration of a liquid crystal device as an electro-optical device. Hereinafter, the configuration of the liquid crystal device will be described with reference to FIG.

  As shown in FIG. 1, the liquid crystal device 10 includes a liquid crystal panel 100 as an electro-optical panel, a flexible wiring board 200, and a frame 300. The frame 300 is fixed to the liquid crystal panel 100 by a hook (not shown).

  Dust-proof glass (not shown) is attached to the front and back surfaces of the liquid crystal panel 100. More specifically, the dustproof glass is provided to prevent dust and the like from adhering to at least the display area of the liquid crystal panel 100. Further, for example, a driving IC 400 is mounted on the flexible wiring board 200.

  For example, the driving IC 400 includes a part of a data line driving circuit (not shown). The driving IC 400 is electrically and mechanically mounted on the flexible wiring board 200 using a TAB (Tape Automated Bonding) technique. The flexible wiring board 200 includes, for example, an insulating base material such as polyimide, and a wiring pattern formed on the base material.

  FIG. 2 is a schematic plan view showing the structure of the liquid crystal panel constituting the liquid crystal device. FIG. 3 is a schematic cross-sectional view taken along the line AA ′ of the liquid crystal panel shown in FIG. Hereinafter, the structure of the liquid crystal device will be described with reference to FIGS. 2 and 3, the illustration of the flexible wiring board is omitted.

  As shown in FIGS. 2 and 3, the liquid crystal panel 100 constituting the liquid crystal device 10 includes, for example, a TFT using a thin film transistor (hereinafter referred to as “TFT (Thin Film Transistor) element”) as a pixel switching element. This is an active matrix liquid crystal panel. In the liquid crystal panel 100, an element substrate 12 and a counter substrate 13 constituting a pair of substrates are bonded together via a sealing material 14 having a substantially rectangular frame shape in plan view.

  The element substrate 12 and the counter substrate 13 are made of a translucent material such as quartz, for example. The liquid crystal panel 100 has a configuration in which a liquid crystal layer 15 is enclosed in a region surrounded by a sealing material 14. The sealing material 14 is provided with a liquid crystal injection port 16 for injecting liquid crystal, and the liquid crystal injection port 16 is sealed with a sealing material 17.

  As the liquid crystal layer 15, for example, a liquid crystal material having a positive dielectric anisotropy is used. In the liquid crystal panel 100, a frame light-shielding film 18 having a rectangular frame shape made of a light-shielding material is formed on the counter substrate 13 along the vicinity of the inner periphery of the sealing material 14, and an area inside the frame light-shielding film 18 is formed. It is a display area 19.

  The frame light shielding film 18 is made of, for example, aluminum (Al), which is a light shielding material, and is provided so as to partition the outer periphery of the display region 19 on the counter substrate 13 side.

  In the display area 19, pixel areas 21 are provided in a matrix. The pixel area 21 constitutes one pixel that is the minimum display unit of the display area 19. In the region outside the sealing material 14, the data line driving circuit 22 and the panel connection terminal 41a are formed along one side (the lower side in FIG. 2) of the element substrate 12. The flexible wiring substrate 200 for connecting to the outside is electrically connected to the panel connection terminal 41a via the second connection terminal 46a.

  Further, scanning line driving circuits 24 are formed in the inner region of the sealing material 14 along two sides adjacent to the one side. An inspection circuit 25 is formed on the remaining side of the element substrate 12 (upper side in FIG. 2). The frame light shielding film 18 formed on the counter substrate 13 side is formed, for example, at a position facing the scanning line driving circuit 24 and the inspection circuit 25 formed on the element substrate 12 (a position overlapping in plan).

  On the other hand, at each corner of the counter substrate 13 (for example, four corners of the sealing material 14), the vertical conduction terminals 26 (silver) for electrical connection between the element substrate 12 and the counter substrate 13 are provided. Point) is arranged.

  As shown in FIG. 3, a plurality of pixel electrodes 27 are formed on the element substrate 12 on the liquid crystal layer 15 side, and a first alignment film 28 is formed so as to cover the pixel electrodes 27. The pixel electrode 27 is a conductive film made of a transparent conductive material such as ITO (Indium Tin Oxide).

  On the other hand, a lattice-shaped light shielding film (BM: black matrix) (not shown) is formed on the liquid crystal layer 15 side of the counter substrate 13, and a flat solid common electrode 31 is formed thereon. A second alignment film 32 is formed on the common electrode 31. The common electrode 31 is a conductive film made of a transparent conductive material such as ITO.

  The liquid crystal panel 100 is a transmissive type, and polarizing plates (not shown) and the like are respectively disposed on the light incident side and the light emitting side of the element substrate 12 and the counter substrate 13. The configuration of the liquid crystal panel 100 is not limited to this, and may be a reflective type or a transflective type.

  FIG. 4 is an equivalent circuit diagram showing an electrical configuration of the liquid crystal panel. Hereinafter, the electrical configuration of the liquid crystal panel will be described with reference to FIG.

  As shown in FIG. 4, the liquid crystal panel 100 has a plurality of pixel regions 21 that constitute the display region 19. A pixel electrode 27 is disposed in each pixel region 21. A TFT element 33 is formed in the pixel region 21.

  The TFT element 33 is a switching element that controls energization of the pixel electrode 27. A data line 34 is electrically connected to the source side of the TFT element 33. Each data line 34 is supplied with, for example, image signals S1, S2,..., Sn from the data line driving circuit 22 (see FIG. 2).

  A scanning line 35 is electrically connected to the gate side of the TFT element 33. For example, scanning signals G1, G2,..., Gm are supplied to the scanning lines 35 in a pulsed manner at a predetermined timing from the scanning line driving circuit 24 (see FIG. 2). Further, the pixel electrode 27 is electrically connected to the drain side of the TFT element 33.

  .., Gm supplied from the scanning line 35 causes the TFT element 33 serving as a switching element to be in an ON state for a certain period, so that the image signals S1, S2,. , Sn are written to the pixel region 21 via the pixel electrode 27 at a predetermined timing.

  The predetermined level image signals S1, S2,..., Sn written in the pixel region 21 are held for a certain period by a liquid crystal capacitor formed between the pixel electrode 27 and the common electrode 31 (see FIG. 3). In order to prevent the retained image signals S1, S2,..., Sn from leaking, a pixel potential side capacitor electrode electrically connected to the pixel electrode 27 and a shield layer (example of a capacitor line) A storage capacitor 37 is formed between the capacitor electrode 36 and a capacitor electrode 36 (not shown).

  Thus, when a voltage signal is applied to the liquid crystal layer 15, the alignment state of the liquid crystal molecules changes according to the applied voltage level. Thereby, the light incident on the liquid crystal layer 15 is modulated to generate image light.

<Configuration of flexible wiring board>
FIG. 5 is a schematic plan view showing the configuration of the liquid crystal device of the present embodiment. FIG. 6 is an exploded plan view showing a state before the liquid crystal panel and the flexible wiring board are connected. Hereinafter, the structure of the liquid crystal device and the liquid crystal panel and the flexible wiring board constituting the liquid crystal device will be described with reference to FIGS. Note that the liquid crystal device 10 illustrated in FIG. 5 does not illustrate the frame 300, the driving IC, and the like.

  As shown in FIG. 5, in the liquid crystal device 10, the liquid crystal panel 100 and the flexible wiring board 200 are electrically connected to each other via an anisotropic conductive film (ACF) that is not shown in the connection terminal portion 51. ing. Specifically, on the element substrate 12 (see FIG. 3) of the liquid crystal panel 100, wirings (data lines 34, scanning lines 35, etc.) electrically connected to the data line driving circuit 22 and the scanning line driving circuit 24 are provided. These wirings are electrically connected to the driving IC 400 and the external connection terminal portion 52 provided on the flexible wiring board 200 via the connection terminal portion 51.

  An image signal input through the wiring is supplied to various circuit elements such as a switching element for image display and a data line 34 via the driving IC 400, whereby a desired image is displayed in the display area 19. Is done.

  As shown in FIG. 6, the liquid crystal panel 100 is provided with a panel connection terminal portion 41 in which a plurality of panel connection terminals 41 a for electrical connection with the flexible wiring board 200 are arranged densely. The terminal arrangement of the panel connection terminal portion 41 may differ depending on the model of the liquid crystal panel 100.

  For example, the pitch of the panel connection terminals 41a is different, or the number of the panel connection terminals 41a is different. Therefore, the conventional flexible wiring board cannot be used in common for all types of liquid crystal panels, and a dedicated flexible wiring board suitable for each type of liquid crystal panel is required.

  However, the flexible wiring board 200 of the present embodiment includes a first FPC connection terminal portion 45 (first connection terminal portion) having a plurality of first connection terminals 45a for electrical connection with the liquid crystal panel 100, and a plurality of first connection terminals 45a. A second FPC connection terminal portion 46 (second connection terminal portion) having a second connection terminal 46a is provided. The second FPC connection terminal portion 46 is disposed on the distal end side (the liquid crystal panel 100 side) of the first FPC connection terminal portion 45 in the flexible wiring board 200. Further, the second FPC connection terminal portion 46 has a terminal arrangement different from that of the first FPC connection terminal portion 45, and, for example, the number of terminals is reduced.

  In the present embodiment, for example, the terminal arrangement of the panel connection terminal portion 41 (41a) and the terminal arrangement of the second FPC connection terminal portion 46 (46a) are the same, so these terminals are as shown in FIG. Connected. Thus, since one flexible wiring board 200 can correspond to the terminal arrangement of a plurality of types of liquid crystal panels, it is not necessary to prepare a dedicated flexible wiring board 200 according to the type of the liquid crystal panel 100. Inventory management can be facilitated, and man-hours and costs for the flexible wiring board 200 can be reduced.

  FIG. 7 is a schematic plan view showing a specific example of the terminal arrangement of the first FPC connection terminal portion and the second FPC connection terminal portion in the flexible wiring board. Hereinafter, a specific example of the terminal arrangement will be described with reference to FIG.

  First, on one end side of the flexible wiring boards 201 and 202 shown in FIGS. 7A and 7B, a first FPC connection terminal portion 45 having a plurality of first connection terminals 45a and a plurality of second connection terminals. A second FPC connection terminal portion 46 having 46a is provided (illustration of a plurality of connection terminals is omitted). Further, the number of terminals of the second FPC connection terminal portion 46 is smaller than the number of terminals of the first FPC connection terminal portion 45.

  Specifically, for example, like the flexible wiring board 201 shown in FIG. 7A, the second FPC connection terminal portion 46 is connected to a part of the image signal (terminal region 45 b) in the first FPC connection terminal portion 45. The terminal is omitted. In other words, a part (45b) of the first FPC connection terminal portion 45 is not electrically connected to the second FPC connection terminal portion 46.

  As described above, the reason why the terminal arrangements of the FPC connection terminal portions 45 and 46 are different is that a plurality of image signals for image signal transfer prepared in order to ensure the writing time of the image signal according to the model of the liquid crystal device 10. The case where the number of lines is different, that is, the case where the number of phase expansions is different, is mentioned. For example, the number of image signal lines is different between 12 and 6, for example, 12 and 6. However, assuming that the number of other control signal lines is the same, only the terminals of the portions assigned to the image signal lines are provided so as to have different numbers. Also, it is necessary to change the terminal arrangement according to the low-resolution model or the high-resolution model.

  When the terminal arrangement of the panel connection terminal portion 41 of the liquid crystal panel 100 corresponds to the terminal arrangement of the first FPC connection terminal portion 45, the first FPC connection terminal portion 45 is selected and connected. When the terminal arrangement of the panel connection terminal portion 41 corresponds to the terminal arrangement of the second FPC connection terminal portion 46, the second FPC connection terminal portion 46 is selected and connected.

  Further, as in the flexible wiring board 202 shown in FIG. 7B, for example, the second FPC connection terminal portion 46 is connected to a part of the image signal (terminal regions 45c, 45d, 45e) in the first FPC connection terminal portion 45. The terminal to be used is omitted. In other words, a part (45c, 45d, 45e) of the first FPC connection terminal portion 45 is not electrically connected to the second FPC connection terminal portion 46.

  Similarly to the above, when the terminal arrangement of the panel connection terminal portion 41 of the liquid crystal panel 100 corresponds to the terminal arrangement of the first FPC connection terminal portion 45, the first FPC connection terminal portion 45 is selected and connected. When the terminal arrangement of the panel connection terminal portion 41 corresponds to the terminal arrangement of the second FPC connection terminal portion 46, the second FPC connection terminal portion 46 is selected and connected. Hereinafter, a method for manufacturing the liquid crystal device 10 will be described.

<Method of manufacturing electro-optical device>
FIG. 8 is a flowchart showing a method of manufacturing a liquid crystal device as an electro-optical device in the order of steps. 9 and 10 are schematic plan views showing some steps in the method of manufacturing the liquid crystal device. Hereinafter, a method for manufacturing the liquid crystal device will be described with reference to FIGS.

  First, a manufacturing method on the element substrate 12 side will be described. In step S11, the TFT element 33 and the like are formed on the element substrate 12 made of a quartz substrate or the like. Specifically, the TFT element 33 and the like are formed on the element substrate 12 by using a well-known film forming technique, photolithography technique, and etching technique.

  In step S12, the pixel electrode 27 is formed. Specifically, the pixel electrode 27 is formed above the TFT element 33 on the element substrate 12 by using a well-known film forming technique, photolithography technique, and etching technique, similarly to the formation of the TFT element 33 and the like.

In step S <b> 13, the first alignment film 28 is formed above the pixel electrode 27. As a manufacturing method of the first alignment film 28, for example, an oblique deposition method in which an inorganic material such as silicon oxide (SiO ₂ ) is obliquely deposited is used. Thus, the element substrate 12 side is completed.

  Next, a manufacturing method on the counter substrate 13 side will be described. First, in step S21, the common electrode 31 is formed on the counter substrate 13 made of a light-transmitting material such as a quartz substrate by using a well-known film forming technique, photolithography technique, and etching technique.

  In step S <b> 22, the second alignment film 32 is formed on the common electrode 31. The manufacturing method of the second alignment film 32 is the same as that of the first alignment film 28. For example, the oblique deposition method is used. Thus, the counter substrate 13 side is completed. Next, a method for bonding the element substrate 12 and the counter substrate 13 will be described.

  In step S <b> 31, the sealing material 14 is applied on the element substrate 12. In detail, the relative positional relationship between the element substrate 12 and the dispenser (which may be a discharge device) is changed, and the sealing material 14 is placed on the periphery of the display area 19 in the element substrate 12 (so as to surround the display area 19). Apply.

  In step S32, the element substrate 12 and the counter substrate 13 are bonded together. Specifically, the element substrate 12 and the counter substrate 13 are bonded together through the sealing material 14 applied to the element substrate 12. More specifically, it is performed while ensuring the positional accuracy in the vertical and horizontal directions of the substrates 12 and 13.

  In step S33, liquid crystal is injected into the structure from the liquid crystal injection port 16 (see FIG. 2), and then the liquid crystal injection port 16 is sealed. For sealing, for example, a sealing material 17 such as a resin is used.

  In step S34, the flexible wiring board 200 is connected (bonded) to the liquid crystal panel 100 (bonding step). Specifically, this will be described with reference to FIGS. First, as shown in FIG. 9A, an uncut flexible wiring board, that is, a flexible wiring board 200a provided with the first FPC connection terminal portion 45 to the third FPC connection terminal portion 47 is prepared. Note that the number of terminals decreases from the first FPC connection terminal portion 45 toward the third FPC connection terminal portion 47.

  And the FPC connection terminal parts 45-47 of the flexible wiring board 200a corresponding to the arrangement pattern of the panel connection terminal part 41 of the liquid crystal panel 100 are selected. Here, for example, it is assumed that the terminal arrangement of the second FPC connection terminal portion 46 matches the terminal arrangement of the panel connection terminal portion 41.

  Next, as shown in FIG. 9B, the end of the second FPC connection terminal portion 46 is connected to the flexible wiring board 200a so that the second FPC connection terminal portion 46 and the panel connection terminal portion 41 can be electrically connected. The tip side is cut so as to be arranged at the tip (cutting step).

  Next, as shown in FIG. 10, the second FPC connection terminal portion 46 of the flexible wiring board 200 is connected to the panel connection terminal portion 41 of the liquid crystal panel 100. For example, the flexible wiring board 200 is electrically connected to the liquid crystal panel 100 by thermocompression bonding the panel connection terminal portion 41 and the second FPC connection terminal portion 46 via an ACF (not shown). In the present embodiment, the first FPC connection terminal portion 45 is not used. Thus, the liquid crystal device 10 is completed.

<Configuration of electronic equipment>
FIG. 11 is a schematic diagram illustrating a configuration of a liquid crystal projector as an example of an electronic apparatus including the above-described liquid crystal device. Hereinafter, the configuration of the liquid crystal projector including the liquid crystal device will be described with reference to FIG.

  As shown in FIG. 11, the liquid crystal projector 901 has a structure in which three liquid crystal modules employing the liquid crystal device 10 described above are arranged and used as RGB light valves 911R, 911G, and 911B, respectively.

  Specifically, when projection light is emitted from a lamp unit 912 of a white light source such as a metal hydrolamp, the light components R, G, and B corresponding to the three primary colors of RGB are generated by three mirrors 913 and two dichroic mirrors 914. Divided and led to light valves 911R, 911G, and 911B corresponding to the respective colors. In particular, the light component B is guided through a relay lens system 918 including an incident lens 915, a relay lens 916, and an exit lens 917 in order to prevent light loss due to a long optical path.

  The light components R, G, and B corresponding to the three primary colors modulated by the light valves 911R, 911G, and 911B are synthesized again by the dichroic prism 919, and then projected as a color image on the screen 921 through the projection lens 920. The

  As described above, the present invention is not limited to the liquid crystal projector 901 in which three liquid crystal modules are arranged, and may be applied to, for example, a liquid crystal projector in which one liquid crystal module is arranged.

  The liquid crystal projector 901 having such a configuration can be efficiently assembled by reducing the cost through the liquid crystal module employing the liquid crystal device 10 described above. In addition to the above-described liquid crystal projector 901, the electronic device provided with the liquid crystal device 10 is a high-definition EVF (Electric View Finder), a mobile phone, a mobile computer, a digital camera, a digital video camera, a television, a display, an in-vehicle device, an audio It can be used for various electronic devices such as devices and lighting devices.

  As described above in detail, according to the flexible wiring board 200 of the present embodiment, the liquid crystal device 10 including the flexible wiring substrate 200, the method for manufacturing the liquid crystal device 10, and the electronic device, the following effects can be obtained.

  (1) According to the flexible wiring board 200 of the present embodiment, since one flexible wiring board 200 includes at least the first FPC connection terminal portion 45 and the second FPC connection terminal portion 46 having different numbers of terminals, for example, flexible When the wiring substrate 200 is connected to the liquid crystal panel 100, the first FPC connection terminal portion 45 or the second FPC connection terminal portion 46 is selected according to the number of terminals of the liquid crystal panel, and a plurality of types of liquid crystal panels and the flexible wiring substrate 200 are connected. Can be connected. Thereby, it is possible to cope with one flexible wiring board 200 without creating a flexible wiring board exclusively for the type of liquid crystal panel. As a result, since a dedicated flexible wiring board is not created, inventory management can be facilitated, and man-hours and costs can be reduced. Further, it is possible to cope with a liquid crystal panel having an irregular connection terminal arrangement.

  (2) According to the liquid crystal device 10 of the present embodiment, the liquid crystal panel 100 and the flexible wiring board 200 are electrically connected using the same flexible wiring board 200 even if the type of the liquid crystal panel 100 is different. The liquid crystal device 10 can be provided.

  (3) According to the method for manufacturing the liquid crystal device 10 of the present embodiment, when the flexible wiring board 200 and the liquid crystal panel 100 are connected using the first FPC connection terminal portion 45, the second FPC connection terminal portion 46 (first FPC connection). The first FPC connection terminal portion 45 is disposed at the end portion of the flexible wiring board 200 by cutting the front end side from the terminal portion 45. Therefore, the liquid crystal panel 100 and the flexible wiring board 200 can be easily connected, and can be electrically connected to each other.

  (4) According to the electronic apparatus of the present embodiment, by providing the liquid crystal device 10 described above, inventory management of the flexible wiring board 200 can be simplified, the cost is suppressed, and an electronic apparatus having high cost performance is provided. can do.

  In addition, embodiment is not limited above, It can also implement with the following forms.

(Modification 1)
As described above, the region of the third FPC connection terminal portion 47 is cut, and the second FPC connection terminal portion 46 and the panel connection terminal portion 41 of the liquid crystal panel 100 are not limited to being connected. The method may be used. The liquid crystal device 110 shown in FIG. 12A shows a connection method when the third FPC connection terminal portion 47 of the flexible wiring board 200a is used. Specifically, since the third FPC connection terminal portion 47 disposed at the most distal end portion of the flexible wiring board 200a is used, the flexible wiring board 200a is connected to the liquid crystal panel 100 without being cut. Even in this case, the connection can be made in correspondence with the terminal arrangement of the panel connection terminal portion 41.

  The liquid crystal device 210 shown in FIG. 12B shows a connection method when the first FPC connection terminal portion 45 of the flexible wiring board 200b is used. Specifically, since the first FPC connection terminal portion 45 disposed on the innermost side of the flexible wiring board 200b is used, the regions of the second FPC connection terminal portion 46 and the third FPC connection terminal portion 47 are cut. Even in this case, the connection can be made in correspondence with the terminal arrangement of the panel connection terminal portion 41.

(Modification 2)
As described above, when the region of the third FPC connection terminal portion 47 and the region of the second FPC connection terminal portion 46 are cut, an external reference may be provided for the portion to be cut. Specifically, as shown in FIG. 13, in the flexible wiring board 200c, the end of the cutting line when the first FPC connection terminal portion 45 is used and the end of the cutting line when the second FPC connection terminal portion 46 is used. For example, recesses 48a and 48b are formed. Further, it may be formed in a V shape or a convex shape. According to this, since the external reference is provided along the cutting line, it becomes easy to position the cutting line when cutting.

(Modification 3)
As described above, the flexible wiring board 200 is not limited to the provision of the three types of FPC connection terminal portions 45 to 47, and the number of FPC connection terminal portions may be smaller than that, or may have a large structure. But you can.

(Modification 4)
As described above, in the flexible wiring boards 201 and 202 shown in FIG. 7, the wiring connected from the first FPC connection terminal portion 45 to the second FPC connection terminal portion 46 may have the following form. For example, as shown in FIG. 7, there is no wiring connected to the terminal regions 45 b to 45 e between the first FPC connection terminal portion 45 and the second FPC connection terminal portion 46. The wiring corresponding to may be provided and the middle of the wiring may be cut off. According to this, since the wiring corresponding to 45b to 45e is disconnected, the number of terminals to be electrically connected is reduced.

  DESCRIPTION OF SYMBOLS 10,110,210 ... Liquid crystal device as an electro-optical device, 12 ... Element substrate, 13 ... Opposite substrate, 14 ... Sealing material, 15 ... Liquid crystal layer, 16 ... Liquid crystal inlet, 17 ... Sealing material, 18 ... Frame light shielding Film: 19 ... Display area, 21 ... Pixel area, 22 ... Data line drive circuit, 24 ... Scan line drive circuit, 25 ... Inspection circuit, 26 ... Vertical conduction terminal, 27 ... Pixel electrode, 28 ... First alignment film, 31 ... Common electrode, 32 ... Second alignment film, 33 ... TFT element, 34 ... Data line, 35 ... Scanning line, 36 ... Capacitance electrode, 37 ... Storage capacitor, 41 ... Panel connection terminal part, 41a ... Panel connection terminal, 45 ... 1st FPC connection terminal part as 1st connection terminal part, 45a ... 1st connection terminal, 45b-45e ... Terminal area | region, 46 ... 2nd FPC connection terminal part as 2nd connection terminal part, 46a ... 2nd connection terminal, 47 ... Third FPC connection end 48a, 48b ... recess, 51 ... connection terminal, 52 ... external connection terminal, 100 ... liquid crystal panel as electro-optical panel, 200, 200a, 200b, 200c, 201, 202 ... flexible wiring board, 300 ... frame , 400 ... Driving IC, 901 ... Liquid crystal projector, 911R, 911G, 911B ... Light bulb, 912 ... Lamp unit, 913 ... Mirror, 914 ... Dichroic mirror, 915 ... Incident lens, 916 ... Relay lens, 917 ... Exit lens, 918 ... Relay lens system, 919 ... Dichroic prism, 920 ... Projection lens, 921 ... Screen.

Claims (7)

An external connection terminal portion having a plurality of external connection terminals arranged along the first side of the substrate;
First having a plurality of first connection terminals disposed between a second side of the substrate facing the first side and the external connection terminal portion and electrically connected to the plurality of external connection terminals, respectively. A connection terminal,
It is arranged between the second side of the substrate and the first connection terminal part, and is electrically connected to the first connection terminal part, and is smaller in number than the number of terminals of the plurality of first connection terminals. A second connection terminal portion having a plurality of second connection terminals;
A flexible wiring board comprising: The flexible wiring board according to claim 1,
A part of the plurality of first connection terminals is not electrically connected to the plurality of second connection terminals. The flexible wiring board according to claim 1 or 2,
An external cutting reference for separating the second connection terminal portion from the flexible wiring board is provided.   An electro-optical device comprising: the flexible wiring board according to claim 1; and an electro-optical panel electrically connected to the flexible wiring board. An electro-optical device comprising: an electro-optical panel; and a flexible wiring board electrically connected to the electro-optical panel.
The electro-optical panel is provided with a panel connection terminal portion having a plurality of panel connection terminals for electrical connection with the flexible wiring board,
The flexible wiring board includes an external connection terminal portion having a plurality of external connection terminals arranged along the first side of the flexible wiring board, and a second side facing the first side of the flexible wiring board. A first connection terminal portion having a plurality of first connection terminals disposed between the external connection terminal portions and electrically connected to the plurality of external connection terminals, respectively, and the second side of the flexible wiring board And a plurality of second connection terminals that are less than the number of terminals of the plurality of first connection terminals. A second connection terminal portion having,
A method of manufacturing an electro-optical device, comprising: a joining step of selecting either the first connection terminal portion or the second connection terminal portion and electrically joining the panel connection terminal portion. A method for manufacturing the electro-optical device according to claim 5,
An electro-optical device comprising a cutting step of cutting the second connection terminal portion before the joining step when a connection terminal portion connected to the electro-optical panel is selected as the first connection terminal portion. Manufacturing method.   An electronic apparatus comprising the electro-optical device according to claim 4.

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