JP3425115B2 - Inspection method for flat panel display - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting a transmissive flat panel display device used as a display means for, for example, a desk top word processor, a vehicle navigation system, a video tape recorder integrated television, and the like.

[0002]

2. Description of the Related Art FIG. 16 is a perspective view showing a conventional holder 61. FIG. 17 is a perspective view showing the back surface of the display device 71 held by the holder 61. Holder 61
Is configured to include a pair of holding members 62 and 63, and the display device 71 is sandwiched between the pair of holding members 62 and 63. One side surface 62b, 63 of the pair of holding members 62, 63
The parts b are connected by a hinge portion 64. One locking member 67 of a pair of locking members 67 and 68 that is locked to each other is provided on the surfaces of the holding members 62 and 63 on the side where the display device 71 is clamped (hereinafter referred to as “clamping surface”) 62a and 63a.
And the other locking member 68, respectively. Further, the one side surfaces 62b, 6 provided with the hinge portion 64
One side locking member 6 of a pair of locking members 69 and 70 locked to each other is provided on the other side surfaces 62c and 63c opposite to 3b.
9 and the other locking member 70 are provided, respectively. Further, openings 65 and 66 are formed in regions of the holding members 62 and 63 corresponding to the display region of the sandwiched display device 71, respectively.

The display device 71 is realized by, for example, a liquid crystal display device, and includes a liquid crystal display panel 72 having a display area 72a and an IC (Integrated Circuit) chip 73 for driving the liquid crystal display panel 72 as shown in FIG. A tape carrier package (hereinafter referred to as “TCP”) 74 mounted and a hard circuit board 75 are provided. A terminal for inputting a signal for display is drawn out on the peripheral portion of the liquid crystal display panel 72, and the connection terminal of the TCP 74 is connected to the terminal. The TCP 74 is arranged between the liquid crystal display panel 72 and the hard circuit board 75 arranged at the peripheral portion on the display surface side of the liquid crystal display panel 72, and is electrically connected to the liquid crystal panel 72 as described above. With
It is also electrically connected to the hard circuit board 75. A signal cable 76 realized by a flexible wiring board is drawn out from the hard circuit board 75.
A signal for the display is supplied from an external circuit via.

As shown in FIG. 16, such a display device 71 is arranged on the holding surface 62a of one holding member 62 with the holding members 62 and 63 of the holding tool 61 opened, and the other holding member 63 is arranged. Close. By locking the locking members 67, 68 and the locking members 69, 70, the display device 7
1 is held by the holder 61. At this time, the holding member 6
Since the openings 65 and 66 are formed in the reference numerals 2 and 63, the display area of the display device 71, that is, the display area 72a of the liquid crystal display panel 72 is exposed.

A holder 61 having such a structure is proposed in Japanese Patent Application No. 5-328885 filed by the present applicant,
It is suitably used in the manufacturing process and the transportation process of the display device 71. For example, in the inspection process for inspecting the display characteristics of the display device 71, which is one of the manufacturing processes, it is used as follows.

The display device 71 held by the holder 61 is
It is placed on the light source of the inspection device prepared for inspection. At this time, the other holding member 63 of the holder 61 is arranged facing the light source side. The light from the light source enters the display area 72a through the opening 66 of the other holding member 63, and the light transmitted through the liquid crystal display panel 72 exits through the opening 65 of the one holding member 62. An inspection signal is given through the signal cable 76 to inspect the display state. by this,
Even a display device having a relatively low mechanical strength can be handled easily and work efficiency can be improved. In addition, damage to the display device is reduced. Therefore, the manufacturing cost is reduced.

[0007]

In recent years, for example, tabletop word processors, vehicle-mounted navigation systems, and videotape recorder-integrated televisions in which display devices are used have been required to be smaller and thinner. Therefore, a display device mounted on such an electronic device is similarly required to be smaller and thinner. Further, from this, a display device in which the ratio of the display area to the total area of the display surface side of the display device is large, that is, a display device in which the peripheral area of the display area 72a in which the TCP 74 and the hard circuit board 75 are provided is relatively small. Is required.

In the display device in which the peripheral area is relatively small, a flexible wiring board is used to connect the display panel and the hard circuit board, and the flexible wiring board is bent so that the hard circuit board is mounted on the display surface of the display panel. It can be easily realized by disposing it on the side opposite to. Further, the miniaturization and thinning of the display device can be easily realized by using an edge light type backlight module instead of the direct view type backlight module in the transmissive display device as described above. In the direct-view type backlight module, the light source is arranged in an area corresponding to almost the entire display area, but in the edge-light type backlight module, the light from the light source is almost entirely covered by the light guide plate. Since it is guided over the entire surface, the miniaturization and thinning as described above can be realized.

In a transmissive display device in which a rigid circuit board is arranged on the side opposite to the display surface using the flexible wiring board as described above, the light from the backlight module irradiates the entire surface of the display area. As described above, the backlight module is arranged between the display panel and the rigid circuit board.

In the display device which is made smaller and thinner in this way, the display device before the back light module is incorporated is held by the holder 61, and the display state inspection as described above is performed. In this case, the hard circuit board arranged on the side opposite to the display surface blocks the light from the light source of the inspection device, which causes a problem that the entire surface of the display area is not uniformly irradiated with the light.

Therefore, in this case, the display device is held by the holder 6.
It has to be removed from No. 1 and inspected, and if the mechanical strength is relatively low, the display device may be damaged.
In addition, it must be handled so as not to be damaged, and work efficiency is reduced. Moreover, they cause an increase in manufacturing costs.

An object of the present invention is to provide a method of inspecting a flat panel display device which can be easily handled and can be prevented from being damaged.

[0013]

SUMMARY OF THE INVENTION The flat display device of the present invention
The inspection method is that a display panel having a predetermined display area, a drive circuit board on which a drive circuit for giving a display signal to the display panel is mounted, and the drive circuit board is arranged on the side opposite to the display surface of the display panel. In a flat display device, a flexible substrate that electrically connects the drive circuit board and the display panel is sandwiched by a holder and handled in an inspection process.
In the inspection method, the holder has a pair of holding members arranged on the display surface side of the display panel and on the opposite side to the display surface side to sandwich the flat panel display device, and among the pair of holding members. The holding member positioned on the display surface side of the display panel has a region corresponding to the display region as a translucent region, and one of the holding members is a holding member,
One of the pair of locking members that is locked to each other when the pair of holding members are arranged facing each other has one locking member, and the other holding member has the other locking member. When the stop member is locked, by the pair of holding members,
An insertion port for inserting a light source is formed on the side opposite to the display surface of the display panel, and the light source is inserted from the insertion port, and the display state is inspected while being sandwiched by the holder. I am trying.

Further, the surface resistance of the sandwiching surface of the pair of holding members for sandwiching at least the flat panel display device is selected in a range of 10 ⁶ Ω or more and 10 ⁹ Ω or less.

According to the present invention, the flat panel display device is sandwiched by the pair of holding members of the holder and handled in, for example, the manufacturing process and the transportation process. One of the pair of holding members has one holding member of the pair of locking members that are locked with each other, and the other holding member has the other locking member. By sandwiching the flat panel display device with the pair of holding members and locking the pair of locking members, the flat panel display device is arranged and held at a predetermined position of the holder without being displaced. Of the pair of holding members, the holding member located on the display surface side of the display panel has a light-transmitting region corresponding to the display region of the display panel, and when the pair of locking members is locked, An insertion opening for inserting a light source is formed on the side of the display panel opposite to the display surface by the pair of holding members. When the flat display device is held by such a holder and the display state is inspected in the inspection step, which is one of the manufacturing steps, the light source is inserted through the insertion port to emit light. The light from the light source is applied to the display area of the display panel, and the light transmitted through the display panel is emitted from the light transmitting area of the holding member on the display surface side.

Therefore, even if the flat display device is designed to be compact and thin by disposing the hard circuit substrate on the side opposite to the display surface of the display panel by using the flexible wiring substrate, the light from the light source is emitted. Is irradiated on the entire surface of the display area. Therefore, the inspection of the display state can be performed while being held in the holder, the flat display device can be easily handled, and the flat display device can be prevented from being damaged.

Further preferably, the surface resistance of at least a sandwiching surface of the pair of holding members for sandwiching at least the flat panel display device is:
It is selected in the range of 10 ^{6 to} 10 ⁹ Ω and has an antistatic function added. This is achieved, for example, by adding an antistatic agent to the material forming the holding member and adjusting the surface resistance of the holding member to fall within the above range. As a result, the flat panel display device can be protected from being damaged by static electricity.

Further preferably, the holding member having no light-transmitting area of the pair of holding members has a guide member for inserting the light source at a predetermined position corresponding to the display area, and the light source is Since it is easily inserted by the guide member and at the optimum position, the display state can be efficiently inspected.

Further, preferably, the drive circuit board of the flat panel display device has a connector portion to which a signal cable is connected, and the holding member having no light transmitting region has an opening for exposing the connector portion and an exposed portion. And a guide member for guiding the signal cable to the connector portion. Therefore, at the time of inspecting the display state, the signal cable for inputting the inspection signal can be connected in a state where the flat display device is held by the holder, and can be easily connected by the guide member. .

Further preferably, one of the pair of holding members is fitted with one of the pair of fitting members which are fitted to each other when the pair of locking members are locked. The other holding member has the other fitting member. Therefore, the pair of fitting members perform a guiding function and a positioning function when the flat display device is sandwiched between the pair of holding members, and the flat display device can be easily and reliably sandwiched between the pair of holding members. You can

Further, preferably, the locking member of the holding member is formed on the side of the holding surface for holding the flat panel display device. After arranging the flat panel display device between the pair of holding members, pressure is applied to the pair of holding members in a direction in which the holding members approach each other according to a pressure instruction mark formed on the outer surface opposite to the sandwiching surface. The locking member is locked by applying. Since the position where the pressure is applied is clarified by the pressurization instruction mark, the pressure applied to the easily damaged portion of the flat panel display device is reduced.

Further, preferably, the holding member has a light absorbing property, so that when the light source is inserted and the display state is inspected, unnecessary light of the light from the light source is absorbed by the holding member. . Therefore, the light diffusely reflected by the holding member does not enter the display area of the display panel, the display state can be accurately inspected, and the reliability of the inspection result is improved.

[0023]

1 is a perspective view showing a state in which holding members 2 and 3 of a holder 1 according to an embodiment of the present invention are opened. FIG. 2 is a perspective view showing a state in which the holding members 2 and 3 of the holder 1 are closed. FIG. 3 is an enlarged perspective view of the pair of locking members 7 and 8, respectively. As shown in FIG. 1, the holder 1 includes a pair of holding members 2 and 3 having a substantially rectangular shape.
The display device described below is sandwiched between the holding members 2 and 3 and used. The one side surfaces 2b and 3b of the holding members 2 and 3 are connected to each other by a hinge portion 4. In this embodiment, they are connected by two hinge portions 4.

One surface of the holding members 2 and 3 on which the display device is sandwiched (hereinafter referred to as a "sandwiching surface") 2a and 3a are a plurality of (4 in this embodiment) a pair of locking members 7 and 8, And a plurality (two in this embodiment) of a pair of fitting members 11 and 12. The holding surface 2a has one locking member 7 and one fitting member 11, and the holding surface 3a has the other locking member 8 and the other fitting member 12. The locking members 7, 8 are the holding members 2,
3 are provided at the four corners, respectively. Fitting member 11,
12 are respectively provided at the corners on the side where the hinge part 4 is not attached.

The holding surfaces 2a, 3a of the holding members 2, 3 have convex portions 13, 14 for fixing the held display device so as not to be displaced. The holding surface 2a has a convex portion 13, and the holding surface 3a has a convex portion 14. A plurality of protrusions 13 and 14 (four in this embodiment) are provided, and the locking members 7 and 8 are provided.
Similarly to the above, the four corners of the holding members 2 and 3 are provided respectively.

A holding member 2 located on the display surface side of the display device.
An opening 5 is formed in the holding surface 2a in a region corresponding to the display region of the display device to be held. The holding member 3 located on the surface opposite to the display surface of the display device has an opening 6 formed in a region corresponding to the connector portion of the display device.

As shown in FIG. 2, when the holding members 2 and 3 are closed, the one side surface 2b of the holding members 2 and 3,
An insertion opening 17 for inserting the backlight module is formed by the other side surfaces 2c and 3c on the side opposite to 3b. Therefore, the other side surfaces 2c, 3c of the holding members 2, 3
Notches 17a and 17b are formed in each of them. The backlight module includes the holding surface 3 of the holding member 3.
The guide member 16 formed on a is easily inserted into a predetermined position corresponding to the display area of the display device. The guide member 16 of the present embodiment is formed so that its height increases from the other side surface 3c toward the one side surface 3b.

On the other surface (hereinafter, referred to as “outer surface”) 2f, 3f opposite to the holding surfaces 2a, 3a on the display device side, a plurality of (4 in this embodiment) pressure instruction marks 18 are respectively provided. It is attached. The pressurizing instruction mark 18 is composed of a mark 18a indicating that pressure is applied and an arrow mark 18b indicating a position where pressure is applied, and is attached in the vicinity of the locking members 7 and 8. This mark 18 part is a holding member 2, 3
By applying pressure in the direction in which the
8 is locked.

Further, the side surfaces 2b, 3b of the holding members 2, 3
Side surfaces 2d, 3d, which are different from 2c, 3c and face each other,
2e and 3e have a pair of locking members 9 and 10, respectively. In this embodiment, one locking member 9 and 10 is provided on the side surfaces 2d and 3d, and one locking member 9 and 10 is provided on the other side surfaces 2e and 3e. One side locking member 9 is formed on the side surfaces 2d and 2e on the holding member 2 side, and the other side locking member 10 is formed on the side surfaces 3d and 3e on the holding member 3 side. When the holding members 2 and 3 are closed, the locking members 7 and 8 are locked and the locking members 9 and 10 are also locked.

FIG. 4 is a cross-sectional view for explaining the engagement state of the locking members 7, 8, 9, and 10. As shown in FIG. 4 (1), the locking members 7 are parallel to each other. And has two projecting portions 7a and 7b formed in a direction projecting from the surface of the holding member 2, and the interval between the projecting portions 7a and 7b is formed so as to become wider toward the tip end portion. There is.
Further, the locking members 8 are arranged in parallel with each other, and two projecting portions 8 formed in a direction projecting from the surface of the holding member 3.
The protrusions 8a and 8b are formed so that the distance between the protrusions 8a and 8b is narrower toward the tip end, which is opposite to the locking member 7. The locking members 9 and 10 are the holding members 2 and
3 has projecting portions 9a and 10a respectively formed in the direction of projecting from the surface.

When the position designated by the pressing instruction mark 18 is pressed in the direction of the arrow 19a, that is, in the direction in which the holding members 2 and 3 approach each other, as shown in FIG. , 8b, the protrusions 7a, 7b are fitted between the protrusions 7a, 7b, and the protrusions 7a, 7b having the intervals as described above.
The locking members 7, 8 are locked by b, 8a, 8b.
Further, the protrusions 9a and 10a are hooked together. In this way, the holding members 2 and 3 are closed. On the other hand, when the holding members 2 and 3 are opened, a force in the holding member 2 direction in which the locking member 9 is formed on the locking member 9 is applied in the holding member 3 direction in which the locking member 10 is formed to the locking member 10. Apply force respectively. As a result, the holding members 2 and 3 move in the direction of arrow 19b, that is, the holding members 2 and 3 move away from each other.

FIG. 5 is an exploded perspective view showing the structure of the display device 21 held by the holder 1. FIG. 6 is a perspective view showing the surface of the display device 21. FIG. 7 shows the display device 2.
8 is a perspective view showing the back surface of FIG. 1, and FIG. 8 is a side view showing the hard circuit board 29 portion of the display device 21 in an enlarged manner. The display device 21 includes a display panel 22, flexible wiring boards 23 and 24 on which an IC chip 25 is mounted, a frame 26, and a hard circuit board 29.

The display panel 22 is realized by, for example, a transmissive display panel such as a liquid crystal display panel, and a terminal for inputting a signal for display is drawn out on the peripheral portion thereof. In this embodiment, two display panels 22 adjacent to each other are provided.
The terminals are drawn out to the two side surfaces 22b and 22c, and the terminals of the flexible wiring boards 23 and 24 are connected to the terminals, respectively. The display panel 22 has a predetermined display area 22a, and this display area 22a corresponds to the display area of the display device 21.

On the side opposite to the display surface of the display panel 22,
A rectangular frame 26 that holds the display panel 22 is arranged. The frame 26 has an opening 26a formed in a region corresponding to the display region 22a of the display panel 22. The four corners of the frame 26 are respectively provided with insertion holes 27 through which the convex portions 14 are inserted when the frame 26 is held by the holder 1. Further, the frame 26 has a notch 31 for inserting the backlight module between the display panel 22 and the hard circuit board 29. The notch 31 is formed on a side surface 26b different from the side surface of the display panel 22 on which the flexible wiring boards 23 and 24 are arranged.

On the side of the frame 26 opposite to the display panel 22, a hard circuit board 29 is arranged at a position corresponding to the flexible wiring boards 23 and 24 on which the IC chip 25 is mounted.

The flexible wiring boards 23 and 24 and the hard circuit board 29 are inserted through the positioning holes 23a and 23 formed in the boards 23, 24 and 29 and the frame 26, respectively.
Positioned and connected by b, 24a, 28, 29a and 29b. The one side surface 22b side of the display panel 22 has insertion holes 23a, 28, 29a, in order from the display surface side.
23b are overlapped and connected in this order, and the other side surface 22c side is similarly overlapped and connected in order from the display surface side to the insertion holes 29b and 24a. Thus, by using the flexible wiring boards 23 and 24, the hard circuit board 29 can be arranged on the side opposite to the display surface of the display panel 22, and the display device 21 can be downsized. The hard circuit board 29 is provided with a connector portion 30 on the opposite side of the hard circuit board 29 from the frame 26, to which a signal for display from an external circuit is given.

FIG. 9 is a perspective view showing a state in which the display device 21 is arranged with the holding members 2 and 3 of the holder 1 being opened. FIG. 10 is an enlarged sectional view showing a state in which the convex portion 14 is inserted into the insertion hole 27. FIG. 11 shows a display device 21.
With the holding members 2 and 3 of the holder 1 closed,
FIG. 3 is a perspective view showing the back surface of the holder 1. When holding the display device 21 as described above in the holder 1, first, the holder 1
With the holding members 2 and 3 open, the display surface of the display device 21 is on the holding member 2 side, and the side opposite to the display surface is the holding member 3 side. Deploy. At this time, the convex portion 14 of the holding member 3 is inserted into the insertion hole 27 of the frame 26 of the display device 21.

As shown in FIG. 10, the convex portion 14 is composed of a truncated cone-shaped convex portion 14a and a cylindrical convex portion 14b whose diameter is smaller than the smallest diameter of the convex portion 14a. The convex portion 14b is provided on the convex portion 14a. The insertion hole 27 is composed of a circular insertion hole 27a and a circular insertion hole 27b whose diameter is smaller than that of the insertion hole 27, and the insertion hole 27a is formed on the insertion hole 27b. When the display device 21 is arranged on the holding member 3,
First, the insertion hole 27a is guided along the convex portion 14b. At this time, the display device 21 can be smoothly guided by forming the insertion hole 27a so that the diameter thereof is larger than the diameter of the convex portion 14b. Next, the convex portion 14b is inserted into the insertion hole 27b and the convex portion 14a is inserted into the insertion hole 27a, and the diameters of the both are made approximately the same, thereby rattling the display device 21 in the horizontal direction with respect to the display surface. It can be fixed without. In this way, the stepped portion between the convex portion 27a and the convex portion 27b, the insertion hole 27a, and the insertion hole 27b.
The position of the display device 21 is determined by the contact between the step portion and the step portion.

Subsequently, when the holding members 2 and 3 are closed as described above, the pair of fitting members 11 and 12 are fitted and the locking members 7 and 8 and the locking members 9 and 10 are locked. . At this time, the convex portion 13 provided on the holding member 2 contacts the portion where the insertion hole 27 is formed. Therefore, the display device 21 can be fixed without rattling in the vertical direction with respect to the display surface.

Further, as shown in FIG. 11, from the opening 6 of the holding member 3, the hard circuit board 29 of the display device 21 is provided.
The connector portion 30 provided in the is exposed. A guide member for guiding the signal cable to the connector portion 30 in order to easily connect the signal cable to the connector portion 30 exposed from the opening 6 on the outer surface 3f of the holding member 3 opposite to the sandwiching surface 3a. 20 are formed.

When the holding members 2 and 3 are closed,
Insertion holes 15a, 1 provided in the holding members 2, 3 respectively
Insertion holes 15 that communicate with each other from the holding member 2 to the holding member 3 are formed. The insertion hole 15 is used when inspecting the display state, and is used for positioning for aligning the viewing angles when inspecting a plurality of display devices, for example. This can reduce variations in inspection results.

FIG. 12 is a cross-sectional view taken along the section line II of FIG. 11, in which the display device 21 is held by the holder 1 as described above, and the manufacturing process of the display device 21 is performed. The states in the inspection process, which is one process, are shown. 12 (1) shows a state before the backlight module 32 is inserted, and FIG. 12 (2) shows a state in which the backlight module 32 is inserted.

As shown in FIG. 12A, the holder 1 holding the display device 21 has an insertion opening 17 into which the backlight module 32 is inserted. An edge light type backlight module 32 is inserted from the insertion opening 17, for example. The backlight module 32 is
The light source 33, the reflector 34, and the light guide plate 35 are included. The light source 33 is provided at one end of the light guide plate 35, and the light from the light source 33 is reflected by the reflection plate 34 and enters the light guide plate 35. The light guide plate 35 uniformly irradiates the light from the light source 33 to the same area as the display area of the display panel 22. The thickness of the light guide plate 35 decreases from one side surface provided with the light source 33 to the other side surface facing the one side surface, and the insertion port 1 is inserted from the other side surface side.
Inserted in 7. The light guide plate 35 is guided by the guide member 16 formed on the holding member 3 and is inserted on the side opposite to the display surface of the display panel 22. In this way, when the backlight module 32 is inserted, the light from the light source 33 uniformly enters the display area of the display panel 22.
Light from the display panel 22 is emitted from the opening 5 formed in the holding member 2.

Since the guide member 16 narrows the gap between the holding member 2 and the holding member 3 from the side of the insertion opening 17 toward the side opposite to the insertion opening 17, the light guide plate 35 of the backlight module 32 is , Is mounted on the side opposite to the display surface of the display panel 22, and is mounted without rattling.

FIG. 13 is a perspective view showing a method of connecting the signal cable 36. FIG. 14 is an enlarged cross-sectional view showing the vicinity where the signal cable 36 is connected to the connector section 30. The signal cable 36 is for giving a display signal for inspection to the display device 21 from an external circuit when inspecting the above-mentioned display state, and is realized by, for example, a flexible wiring board. A polyester plate of about 0.3 mm, for example, is attached to the tip portion 37 for reinforcement. By inserting such a signal cable 36 into the connector portion 30 along the guide member 20,
The terminal portion of the connector portion 30 and the terminal portion of the tip portion 37 of the signal cable 36 are connected to each other, and an inspection signal is supplied from an external circuit via the signal cable 36.

The guide member 20 is formed so that the height 37 of the signal cable 36 is gradually lowered toward the connector portion 30 so that the tip portion 37 of the signal cable 36 can be easily inserted into the connector portion 30. In the vicinity of the connector portion 30, the height is even lower. In the present embodiment, four such guide members 20 are provided at intervals, but the guide members 20 are provided with the signal cable 36 as described above.
Any shape may be used as long as the tip portion 37 of the above is shaped so as to be easily inserted into the connector portion 30.

As described above, according to this embodiment, the hard circuit board 29 is arranged on the side opposite to the display surface of the display panel 22, and the edge light type backlight module 32 is provided.
Even in the case of the display device 21 which has been mounted to reduce its size and thickness, the display state can be inspected while being held by the holder 1. Therefore, the display device 21 can be easily handled, and the risk of damage to the display device 21 is reduced. Therefore, working efficiency is improved and manufacturing cost is reduced.

The holding members 2 and 3 of the holder 1 are formed by, for example, an injection molding method. As a material used, for example, polypropylene is used. At this time, an antistatic function can be added to the holding members 2 and 3 by adding an antistatic agent to the material, and the display device 21 can be protected from static electricity. Can be protected from destruction. As the antistatic agent, for example, a carbon-based antistatic agent can be used. The surface resistance of at least the sandwiching surfaces 2a, 3a of the formed holding members 2, 3 is 10
^It is preferable that it is in the range of ⁶ Ω or more and 10 ⁹ Ω or less. By adding the antistatic agent in such a range, a good antistatic function can be added. When the surface resistance is 10 ⁹ Ω or less, a sufficient antistatic effect can be obtained. When the surface resistance becomes smaller than 10 ⁶ Ω, the surface becomes conductive, and the IC chip 25, the flexible wiring board 23, and the hard circuit board 2
A short circuit occurs with the interior parts such as 9.

Further, by adding a light absorbing property to the holder 1, the backlight module 3 can be used at the time of inspection.
The light from 2 is not diffusely reflected, and the inspection can be performed accurately, and the reliability of the inspection result is improved. Such addition of light absorption can be realized by making the holder 1 a dark color, and easily realized by adding a carbon-based antistatic agent for adding the antistatic function as described above, for example. be able to.

The locking members 7, 8 and the locking members 9, 10
The positions and the number of the fitting members 11 and 12 are not limited to those in the present embodiment, and may be formed at any positions as long as vibration and impact on the held display device 21 can be sufficiently prevented. The number may be any number. Further, the one locking member 7 may be formed on the other holding member 3 and the other locking member 8 may be formed on the one holding member 2, respectively. The same applies to the locking members 9 and 10 and the fitting members 11 and 12. .

FIG. 15 is a perspective view showing an example of mounting a direct-viewing type backlight module 41 to the holder 1 of this embodiment. The direct-view type backlight module 41 includes a light source 42 and a reflecting plate 43. The light source 42 is, for example, 1
The book fluorescent lamp is bent and arranged in an area having substantially the same area as the display area, and the light from the light source 42 is reflected by the reflection plate 43 and emitted in one direction. It is also possible to insert such a direct-view type backlight module 41 from the insertion opening 17 of the holder 1 of this embodiment. This can be performed in the case of a display device that does not require relatively thinning. At the time of inspection of the display state, the light from the light source 42 reflected by the reflection plate 43 enters the display area 22a of the display panel 22.

[0052]

As described above, according to the present invention, even if the flat display device held by the holder is a display device which is downsized and thinned, the flat display device can be operated from the light source inserted in the holder. Since the entire surface of the display area of the display panel is irradiated with the light of, the inspection of the display state of the flat panel display device can be performed while being held in the holder, and the flat panel display device can be easily handled.
Also, the risk of damage is reduced. Therefore, working efficiency is improved and manufacturing cost is reduced.

Further, the flat display device held by adding the antistatic function can be protected from damage due to static electricity.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which holding members 2 and 3 of a holder 1 according to an embodiment of the present invention are opened.

FIG. 2 is a perspective view showing a state in which holding members 2 and 3 of the holder 1 are closed.

FIG. 3 is an enlarged perspective view of a pair of locking members 7 and 8 respectively.

FIG. 4 is a cross-sectional view for explaining a locked state of the locking members 7 and 8 and the locking members 9 and 10.

5 is an exploded perspective view showing a configuration of a display device 21 held by the holder 1. FIG.

6 is a perspective view showing the surface of the display device 21. FIG.

7 is a perspective view showing the back surface of the display device 21. FIG.

8 is an enlarged side view showing a hard circuit board 29 portion of the display device 21. FIG.

9 is a perspective view showing a state in which the display device 21 is arranged with the holding members 2 and 3 of the holder 1 being opened. FIG.

FIG. 10 is an enlarged cross-sectional view showing a state where the convex portion 14 is inserted into the insertion hole 27.

11 is a perspective view showing the back surface of the holder 1 with the display device 21 arranged and the holding members 2 and 3 of the holder 1 closed. FIG.

FIG. 12 is a cross-sectional view showing each holder 1 when inspecting the display state of the held display device 21.

13 is a perspective view showing a method of connecting the signal cable 36. FIG.

FIG. 14 is an enlarged cross-sectional view showing the vicinity where the signal cable 36 is connected to the connector portion 30.

FIG. 15 is a perspective view showing an example in which a direct-viewing type backlight module 41 is attached to the holder 1.

FIG. 16 is a perspective view showing a conventional holder 61.

17 is a perspective view showing a back surface of the display device 71 held by the holder 61. FIG.

[Explanation of symbols]

1 holder 2,3 holding member 5,6 opening 7, 8, 9, 10 Locking member 11,12 Fitting member 13,14 Convex part 16,20 Guide member 17 insertion slot 17a, 17b, 31 Notch 18 Pressing instruction mark 21 Display 22 Display panel 23, 24 Flexible wiring board 25 IC chip 26 frames 29 Rigid circuit board 30 connector 32,41 Backlight module 33,42 light source 34,43 Reflector 35 Light guide plate 36 signal cable

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ identification code FI G02F 1/13357 G02F 1/13357 (58) Fields investigated (Int.Cl. ⁷ , DB name) G09F 9/00 G02F 1/13 , 1/137-1/141 G02F 1/133-1/1334 G02F 1/1339-1/1341 G02F 1/1335-1/13363

Claims (2)

(57) [Claims] 1. A display panel having a predetermined display area, a drive circuit board on which a drive circuit for giving a display signal to the display panel is mounted, and the drive circuit board is arranged on a side opposite to a display surface of the display panel. Of a flat display device which is handled in an inspection process by sandwiching a flexible substrate electrically connecting the drive circuit board and the display panel with a holder.
In the inspection method, the holder has a pair of holding members arranged on the display surface side of the display panel and on the opposite side to the display surface side, and sandwiching the flat panel display device, of the pair of holding members. The holding member located on the display surface side of the display panel has a light-transmitting region corresponding to the display region, and one of the pair of holding members holds the pair of holding members facing each other. Having one of the pair of locking members that are locked to each other when arranged,
The other holding member has the other locking member, and when the pair of locking members are locked, the pair of holding members forms an insertion opening for inserting the light source on the side opposite to the display surface of the display panel. An inspection method for a flat panel display device, comprising: inserting a light source from the insertion port and inspecting a display state while being sandwiched by the holder. 2. The surface resistance of at least a sandwiching surface of the pair of holding members which sandwiches at least the flat panel display device is 10 ⁶ Ω or more 1
2. A range of 0 ⁹ Ω or less is selected.
A method for inspecting a flat panel display device as described.