JP6471590B2 - Display device - Google Patents

Description

  The present invention relates to a display device, and more particularly, to a display device having a structure capable of confirming whether or not constituent members are arranged.

  Examples of the display device include a liquid crystal display device, a liquid crystal display panel including a pair of substrates and a polarizing plate provided so as to sandwich the pair of substrates, a light source device that irradiates the liquid crystal display panel, a liquid crystal display panel, A front frame that engages with the light source device.

  An In-Plane Switching type liquid crystal display device may include a conductive adhesive tape for equipotential connection. Recent display devices tend to be lighter and thinner, and it is necessary to arrange an adhesive tape or the like in a narrower area than the conventional structure.

  A general display device using an In-Plane Switching type liquid crystal display panel is provided with an adhesive tape for equalization in order to equalize the opposing color filter substrate and TFT substrate. The adhesive tape is attached to a rear frame made of a material containing a metal such as aluminum, which is a constituent member of the color filter substrate and the light source device. Further, the front frame is mounted in such a manner that the liquid crystal display panel is sandwiched between the light source devices.

  As described in Patent Literature 1 and Patent Literature 2, in an electronic device, an opening for confirming the presence or absence of a member disposed inside the housing connector or the frame after assembling the electronic device is provided. Patent Document 1 discloses that the presence or absence of an end portion of an FPC is confirmed by an opening. Patent Document 2 discloses that the boundary between lamps arranged inside the reflection sheet is confirmed from the opening.

  Even in a general display device, by providing an opening in the front frame at a position where a conductive adhesive material is disposed for the same potential, the conductive material for the same potential can be provided even after the front frame is mounted. It is possible to confirm whether the adhesive tape is properly attached.

Japanese Patent Laid-Open No. 10-214659 JP 2002-341787 A

  In the configuration disclosed in Patent Document 1 or 2, it is necessary to arrange a member (such as an end of the FPC or a lamp boundary) to be confirmed from the opening at a position where it can be visually recognized, and it is necessary to consider the arrangement accuracy of the member. is there. In addition, when adopting a configuration in which the opening is discriminated by a member having a different color, it is necessary to employ a member having a different color.

  The present invention has been made to solve the above-described problems, and can display the presence / absence of an arrangement member easily without adopting the arrangement accuracy of an arrangement member or the arrangement of additional members. A device is provided.

  A display device of the present invention is a display device including a display panel for displaying an image, and includes a first component member, a second component member disposed at a predetermined position of the first component member, A third constituent member arranged to cover the first and second constituent members, and the third constituent member is provided with a confirmation hole corresponding to a position where the first constituent member is arranged, The second component member includes an identification unit at a position corresponding to the confirmation hole, and the presence or absence of the first component member is determined based on the presence or absence of the identification unit visually recognized from the confirmation hole.

  According to the configuration of the present invention, when the third component member is disposed so as to cover the first component member and the second component member, the confirmation hole and the confirmation hole of the second component member are formed in the third component member. Since the identification means is provided at the position corresponding to It can be easily confirmed.

It is the top view and side view of the display apparatus of this invention. It is AA sectional drawing in the display apparatus of FIG. It is a side view of the light source device which comprises the display apparatus of this invention. It is a side view of the display apparatus of this invention. It is a side view of the light source device which comprises the display apparatus of this invention. It is sectional drawing of the display apparatus of this invention.

Embodiment 1.
Hereinafter, the structure of the display device of the present invention will be described with reference to the drawings. In addition, since what used the same code | symbol in this Embodiment is provided with the same or substantially the same function, description is abbreviate | omitted. 1 is a front view and a side view of the display device of the present invention, FIG. 2 is a cross-sectional view taken along line AA in the plan view of the display device of FIG. 1, FIG. 3 is a side view of a light source device constituting the display device, and FIG. It is a side view of a display apparatus. As shown in FIG. 1 or 2, the display device 100 includes a display panel 1 such as a liquid crystal display panel and a light source device 2 that serves as a light source of the display panel 1. The display panel 1 holds the display panel 1 and the light source device 2 close to each other by a front frame 4 fitted to a rear frame 3 that holds the light source device 2. The display panel 1 includes a pressure-sensitive adhesive tape 5 that is a conductive pressure-sensitive adhesive member for achieving the same potential described later.

<Display panel>
As the display panel 1, a liquid crystal display panel using the birefringence of a liquid crystal material, a display plate on which characters and pictures are printed on a transparent plate, and the like are used. The liquid crystal display panel is formed with a color filter substrate 1a having a color filter, a light shielding layer, and the like formed on the substrate, a thin transistor (hereinafter referred to as TFT) serving as a switching element, a pixel electrode, and the like formed on the substrate. The TFT substrates 1b thus arranged are arranged to face each other. An alignment that aligns the liquid crystal with a spacer for maintaining the distance between the two substrates, a sealing material for bonding the color filter substrate and the TFT substrate, and a liquid crystal material sandwiched between the color filter substrate and the TFT substrate. It is comprised by the film | membrane and the polarizing plate 1c. The liquid crystal display panel controls the orientation of the liquid crystal layer by turning on or off the voltage by the switching element, and modulates the light incident on the liquid crystal display panel in accordance with the video signal for display. In addition to the TN mode, in which a liquid crystal display panel applies a substantially vertical electric field to the color filter substrate and the TFT substrate for display, a switching element and a counter electrode are arranged on the TFT substrate to apply an electric field in the horizontal or oblique direction. There are In-Plane Switching type and Flying Filled-Switching type to be applied.

<Light source device>
The light source device 2 includes a light source and a light guide plate that emits light from the light source in a planar shape, an optical sheet for diffusing and controlling the light of the light guide plate on the light output surface side of the light guide plate, and a light-emitting surface side of the light guide plate The rear frame 3 holds a light source device 2 made of a member (not shown) such as a reflection sheet (including a middle frame) for allowing light emitted from the light guide plate to enter the light guide plate again.

<Light guide plate>
The light guide plate is made of a material such as transparent acrylic resin, polycarbonate resin, or glass. In addition, a light scattering portion is formed on the light exit surface side of the light guide plate to disturb the light propagation direction and guide the light from the light exit surface in the light exit direction. The light scattering portion functions as a means for reflecting light toward the inside of the light guide plate. As a means for reflecting, there are a method of dot printing on the light emitting surface, a method of roughening the light emitting surface to form a textured surface, a method of forming a minute spherical surface or unevenness (not shown), and the like.

<Optical sheet>
The optical sheet disposed on the light emitting surface side of the light guide plate can be disposed by combining a lens sheet, a diffusion sheet, and the like. Alternatively, a lens sheet sandwiched between diffusion sheets may be used. Further, a plurality of lens sheets in which the directions of the prisms are optimally combined may be used to improve the luminance. Furthermore, when improving the diffusibility of a diffusion sheet, you may use two or more diffusion sheets. Further, only one diffusion sheet may be used or not used (not shown).

<Reflection sheet>
The reflective sheet is made of a material in which barium sulfate or titanium oxide is mixed with polyethylene or polyethylene terephthalate, a material in which fine bubbles are formed in a resin, a material in which silver is vapor-deposited on a metal plate, A material coated with a paint containing titanium oxide is used. The reflectance of the reflecting sheet is desirably 90% or more in order to suppress reflection loss on the reflecting surface, and a material that performs specular reflection may be used. By arranging the reflection sheet, the light emitted from the light guide plate can be directed again to the light guide plate and incident on the light guide plate, so that the light use efficiency can be improved (not shown).

<Characteristic configuration of the invention>
In the display panel 1 using the In-Plane Switching type or the Ringe Filled Switching type liquid crystal display panel, when the color filter substrate 1a on which no electrode is formed is charged, a difference in charge from the TFT substrate 1b results in a display defect. There is. Therefore, it is necessary to discharge the charge charged on the color filter substrate 1a. In order to make the color filter substrate 1a and the TFT substrate 1b opposite to each other have the same potential, an adhesive tape 5 for making the same potential is used as the first constituent member. I have. The adhesive tape 5 is pasted at a predetermined position across the color filter substrate 1a constituting the display panel 1 and the rear frame 3 as the second constituent member, and is arranged so as to overlap the rear frame 3. The rear frame 3 is made of a material containing a metal such as aluminum, and discharges the potential of the color filter substrate 1a to the rear frame 3. Further, the rear frame 3 is arranged so as to be covered with the front frame 4 as the third component member with the adhesive tape 5 attached.

  In the display device of the present invention, as shown in FIG. 2, a ruled line is formed on the side 31 of the rear frame 3 at a position corresponding to the confirmation hole 42 formed in the front frame 4 to which the adhesive tape 5 is attached. And identification means 11 such as a notch.

  As shown in FIG. 3, the identification means 11 is provided on the side surface 31 of the rear frame 3 at a position facing the confirmation hole 42 to which the adhesive tape 5 is attached. It is assumed that the identification means 11 forms on the side surface 31 a ruled line for writing a line with a die or a needle, or a mark such as a cut or a hole.

  The shape of the discriminating means (ruled lines and cuts) 11 may be any shape as long as it can be easily distinguished from the side surface 31 of the rear frame 3, that is, the flat surface of the member to be produced. It may be a cut surface or a mark such as silk printing. If the member to be manufactured is an aluminum sheet metal member, it can be distinguished from a flat surface (side surface 31) by preparing a scribe line, so if the adhesive tape 5 for equalization is properly applied or forgotten to be applied Even in this case, it is possible to easily determine the presence or absence of the same potential adhesive tape 5.

  When the adhesive tape 5 is appropriately affixed to the identification means 11 of the rear frame 3 formed as described above, the identification means 11 of the rear frame 3 is connected to the adhesive tape 5 as shown in the side view of FIG. Since they are pasted so as to overlap, the adhesive tape 5 is disposed in a part or all of the region of the rear frame 3 at a position corresponding to the confirmation hole 42 of the front frame 4. That is, the adhesive tape 5 is visually recognized from the confirmation hole 42.

  On the other hand, when the adhesive tape 5 is forgotten to be pasted, the identification means 11 (ruled lines or cuts) is visually recognized in all areas of the confirmation hole 42 of the front frame 4 as shown in FIG.

The operation of the display device of the present invention will be described.
Since the identification means 11 configured on the side surface 31 of the rear frame 3 of the present invention is configured with ruled lines, cuts, holes, or the like, the confirmation hole 42 is compared with a configuration in which the identification means 11 is not provided on the side surface 31. Visibility when checking from is improved. For this reason, when the adhesive tape 5 is appropriately affixed to the identification means 11 of the rear frame 3, the identification means 11 is not visually recognized from the confirmation hole 42 or only partially visible, so that the adhesive tape 5 is affixed. It is possible to judge more reliably. Therefore, the presence / absence of the placement member can be easily confirmed without employing the placement accuracy of the member placed inside or the additional member.

  In addition, when there is some deviation in the attaching position of the adhesive tape 5, the identification means 11 is partially visually recognized from the confirmation hole 42, so that the deviation of the adhesive tape 5 and the presence / absence of application can be confirmed.

  Moreover, since the identification means 11 of the present invention is formed on the side surface of the rear frame 3, it is not necessary to arrange an additional member such as a color member. Therefore, there is no need to consider the pasting accuracy of the additional member, and the problem that the thickness (by the pasting portion) of the display device increases does not occur.

  With such a structure, even after the rear frame 3 is disposed so as to be covered with the front frame 4 with the adhesive tape 5 attached, the rear frame 3 is formed on the rear frame 3 from the confirmation hole 42 of the front frame 4. By confirming the presence or absence of the identifying means 11, it becomes possible to determine whether or not the adhesive tape 5 for equipotential application is properly attached to the side surface 31 of the rear frame 3, and forgetting to attach the adhesive tape 5 Judgment can be made with certainty.

  Therefore, forgetting to attach the adhesive tape 5 can be prevented and the same potential of the display panel can be realized, so that a display device with high display performance can be provided.

  According to the configuration of the present invention, even when the second component member is disposed so as to overlap the first component member, the third component member is formed even if it is disposed so as to cover the third component member. And the identification means formed on the second component at a position corresponding to the confirmation hole, and the presence or absence of the first component can be determined by confirming the presence or absence of the identification means from the confirmation hole. it can.

  Further, with this structure, the identification means 11 that is visually recognized from the confirmation hole 42 when the adhesive tape 5 for equipotentialization is appropriately attached as described above is visually recognized from the confirmation hole 42 by the adhesive tape 5. It suffices to arrange a part or all of the region in a position where it is covered with the adhesive tape 5, and the range of usable lengths of the adhesive tape 3 for potential equalization is widened, so that the structure is more versatile than the conventional structure. . Therefore, the same length of the adhesive tape 5 for potential equalization can be used, so that the cost can be reduced and the structure is suitable for making the product thinner.

  In addition, although the identification means (the scribe line and the notch | incision) 11 was formed in the side surface 31 of the rear frame 3, it is a member which affixes the adhesive tape 5 for the same electric potential, and as shown in FIG. Any structure may be used as long as it is formed on a member (not shown) such as a shield cover disposed outside the light source device 2 and can confirm whether the adhesive tape 5 is properly attached after the display device 100 is assembled.

  In addition, as shown in the side view of FIG. 3, the direction in which the identification means 11 (ruled lines and notches) is formed is an example in which the side surface 31 of the rear frame 3 is in the vertical direction with respect to the vertical direction of the paper and is formed in the vertical direction However, in this case, it is possible to confirm the attachment position (length) in the length direction of the pressure-sensitive adhesive tape 5.

  FIG. 5 is a side view of the light source device. As shown in FIG. 5, on the side surface 31 of the rear frame 3, when the direction for forming the identification means 11 (ruled lines or notches) is a horizontal direction that is a horizontal direction with respect to the vertical direction of the paper surface, The range of the position where the confirmation hole 42 is provided is expanded in the horizontal direction. The direction in which the identification unit 11 is formed may be a combination of a parallel direction and a vertical direction.

Embodiment 2.
In the display device according to the first embodiment, after the identification unit 11 is formed on the rear frame 3 and the front frame 4 is mounted, the adhesive tape 5 is applied from the confirmation hole 42 formed at a position corresponding to the identification unit 11. However, the present invention is not limited to this, and the present invention is not limited to this. The member provided with the confirmation hole and the identification means 11 (ruled line or notch) at the position facing the confirmation hole. And a member configured to cover the ruled lines and cuts when properly arranged, and can be applied without departing from the present invention.

For example, it can be implemented in the following form.
FIG. 6 is a cross-sectional view of a display device according to Embodiment 2 of the present invention. As shown in FIG. 6, the display device 100 according to the second embodiment includes a circuit board 6 for driving the display panel 1 and a flexible printed circuit board (not shown) for connecting the circuit board 6 and the display panel 1. It is necessary to shield the electromagnetic wave on the circuit member 61 on the circuit board 6. Therefore, an adhesive tape 7 for electromagnetic wave shielding is applied so as to cover the circuit member 61, and the adhesive is adhered to the ground frame (wiring, not shown) on the circuit board 6 and the rear frame 3 constituting the light source device 2 that can be connected to the ground. The tape 7 is affixed and covered with the shield cover 8.

  In the second embodiment, a confirmation hole 81 for confirming whether or not the electromagnetic wave shielding adhesive tape 7 is properly attached is provided after the shield cover 8 is attached to the display device. Then, the identification means (ruled lines and cuts) 12 is formed on the circuit board 6 at a position facing the confirmation hole 81 and covered when the electromagnetic wave shielding adhesive tape 7 is properly applied. This is a structure having identification means (ruled lines or cuts) 13 on the bottom surface of the frame 3. The identification means (ruled lines and cuts) 12 on the circuit board 6 may be silk printing frequently used for the circuit board 6.

  With such a structure, it is confirmed that the identification means 12 provided on the circuit board 6 and the identification means 13 formed on the rear frame 3 are not visible from the confirmation hole 81 of the shield cover 8 even after the shield cover 8 is attached. By doing so, it becomes possible to confirm whether or not the adhesive tape 7 is properly attached, and it is possible to provide a highly reliable display device for the electromagnetic wave shield.

  In addition, when the circuit member 61 on the circuit board 6 is a member having a severe operating temperature range restriction such as an integrated circuit, a heat radiation sheet may be used on the surface of the circuit member 61 instead of the shielding adhesive tape. . Therefore, even in this structure, it is possible to confirm whether or not the heat dissipation sheet is properly attached from the confirmation hole 81, and a highly reliable display device for the circuit board 6 can be provided.

1 display panel, 2 light source device, 3 rear frame, 31 side surface of rear frame,
11 Identification means, 4 front frame, 41 side surface, 42 confirmation hole,
5 Adhesive tape, 6 Circuit board, 61 Shield cover, 7 Adhesive tape,
8 Shield cover, 81 Shield cover confirmation hole, 100 display device.

Claims (4)

A display device having a display panel for displaying an image,
A first component member, a second component member disposed at a predetermined position of the first component member, and a third component member disposed so as to cover the first and second component members; With
The third component member includes a confirmation hole corresponding to a position where the first component member is disposed,
The display apparatus which comprises an identification means in the position corresponding to the said confirmation hole in the said 2nd structural member, and judges the presence or absence of the said 1st structural member by the presence or absence of the identification means visually recognized from the said confirmation hole. The display device according to claim 1, wherein the identification unit is a ruled line, a notch, or a hole formed in the second component member. The display panel is a horizontal electric field type liquid crystal display panel in which liquid crystal is disposed between a first substrate and a second substrate, and the first constituent member is made of a conductive adhesive material,
The second constituent member is made of a metal material,
Across the one substrate and the second component of the liquid crystal display panel,
The display device according to claim 1, wherein the first component member is attached. A circuit board for driving the display panel is disposed on the second component member;
The first constituent member is made of an adhesive material,
The second constituent member is made of a metal material,
Across the circuit board and the second component member,
The display device according to claim 1, wherein the first component member is attached.

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