JP5549416B2 - Display device - Google Patents

Description

  The present invention relates to a display device provided with a protective plate arranged to face a display panel.

  In order to protect the display panel from external pressure, a display device is known in which a protective plate is disposed to face the display panel. And the masking film arrange | positioned so that the display area of a display panel may be enclosed is provided in the protective plate at the opposing surface side with respect to a display panel (patent document 1). This blindfold film is not only arranged blindly so that a structure such as a spacer disposed between the display panel and the protective plate cannot be visually recognized by the user, but also has a design property by being colored. It also plays a role to raise.

JP 2010-79011 A

  By the way, in the display panel, since a circuit made of a thin film such as a thin film transistor is formed on a substrate, a relatively expensive non-alkali glass is used for the substrate. On the other hand, unlike the display panel, the protective plate does not necessarily need to use a non-alkali glass because it is not necessary to form a circuit made of a thin film such as a thin film transistor on the substrate. Blue plate glass can be used.

However, when a light-colored blindfold film is provided by using blue glass as the protective plate, if some of the light incident on the blue glass repeats internal reflection, the color unique to the blue glass becomes the color of the blindfold film. There is a problem in that, when added, this is visually recognized as color unevenness of the blindfold film and the design is impaired. In particular, the region provided with no blind film, in a region corresponding to, for example, the display region, when the internal reflection is repeated, light the internal reflection is repeated enters the region provided blindfolded film, blue plate glass unique There is a problem that the color of the color is added to the color of the blindfold film.

In view of the above, an object of the present invention is to provide a display device in which design properties are not impaired by light incident on a protective plate even when blue plate glass is used as the protective plate.

To fulfill the above object, an aspect of the display device of the present invention includes a protective plate disposed so as to face the display panel, the display panel surface facing in the protective plate, the display area of the display panel and a blindfolded film so as to surround the protective plate, with a groove is formed in a region overlapping with the blind film, and filler to the groove is filled, the filler, and the blind film It is characterized by being colored in the same color .

According to the present invention, in the protective plate in the case of using a soda lime glass, it is possible to make is not impaired design by light incident on the protective plate.

It is explanatory drawing of a display apparatus, (a) is a schematic plan view, (b) is a schematic sectional drawing in alignment with the A-A 'line of (a). An example of the optical path of the light which injected into the protective plate. It is explanatory drawing of the formation method of the blindfold film to a protection board, (a) is a preparation process of a protection board, (b) is a formation process of a groove | channel, (c) is a filling process of a filler. (D) is a blind film forming step. The modification of a display apparatus.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
As shown in FIGS. 1A and 1B, the display device 1 includes a display panel 2 that displays an image, a protection plate 3 that is disposed so as to face the display panel 2, and the display panel 2. It includes a drive circuit 16 for driving and controlling the. Here, a spacer 5 formed in a frame shape is disposed between the protective plate 3 and the display panel 2 so as to surround the display region 4, and the resin layer 6 filled in the region surrounded by the spacer 5 is used. The protection plate 3 and the display panel 2 are joined.

  The display panel 2 is, for example, an active matrix liquid crystal display panel, and includes a first substrate 7 in which active elements such as thin film transistors and pixel electrodes are formed in a display region 4 on which an image is displayed, and a first substrate 7. A second polarizing plate 9 disposed so as to face the first polarizing plate 9, a first polarizing plate 9 disposed so that the first substrate 7 is interposed between the second substrate 8, and a second polarizing plate 9 And a second polarizing plate 10 disposed between the substrate 8 and the protective plate 3.

Here, the first substrate 7 and the second substrate 8 are bonded together by a sealing member 11 formed in a frame shape so as to surround the display region 4. A liquid crystal layer 12 is formed by sealing liquid crystal in a region surrounded by the sealing material 11 between the first substrate 7 and the second substrate 8.

  In the display panel 2, the first substrate 7 is formed in a rectangular shape having a larger area than the rectangular second substrate 8, so that the first substrate 7 protrudes from one side of the second substrate 8. A protruding region 7 a is provided on the first substrate 7. And the drive circuit 16 is mounted in the protrusion area | region 7a. Further, the second polarizing plate 10 is formed in a rectangular shape having an area smaller than that of the second substrate 8 and wider than that of the display region 4, and is attached to the second substrate 8. Further, the first polarizing plate 9 is formed in a rectangular shape having an area approximately equal to that of the second polarizing plate 10 and is attached to the first substrate 7.

  The display panel 2 has a total thickness of about 0.5 to 1 in the display region 4 including the first substrate 7, the second substrate 8, the first polarizing plate 9 and the second polarizing plate 10. It is formed to a thickness of 0.0 mm.

  The protection plate 3 is made of so-called blue plate glass such as soda glass, and is formed in a rectangular shape having a thickness of about 2.0 to 3.0 mm and a wider area than the first substrate 7. The protective plate 3 is formed with a blind film 13 made of colored resin on the surface 3a facing the display panel. The blindfold 13 is formed in a frame shape so as to surround the display area 4. In addition, the spacer 5 is arrange | positioned between the blindfold film | membrane 13 and the 2nd polarizing plate so that it may be settled in the area | region where the blindfold film | membrane 13 is arrange | positioned in the board | substrate plane. That is, the spacer 5 is disposed so that it cannot be visually recognized by the blindfold film 13 from the user who observes the image displayed on the display panel 3 through the protective plate 3. Further, the display panel 2 is arranged so that an area other than the display area 4 cannot be visually recognized by a blindfold film 13 from a user who observes an image displayed on the display panel 3 through the protective plate 3.

  Further, the protective plate 3 has a frame-shaped groove 14 formed along the inner periphery of the blindfold film 13. The groove 14 is filled with a filler 15 made of a resin colored in the same color as the blindfold film 13. The depth of the groove can be set as appropriate based on the strength and thickness of the protective plate, but it should be approximately 1/2 to 2/3 of the thickness of the protective plate 3. Is preferred.

  In the display device 1 as described above, as shown in FIG. 2, even when the light L incident on the protective plate 3 from the region corresponding to the display region 4 repeats internal reflection inside the protective plate 3, The light L, which has been repeatedly reflected on the inner surface, can be blocked by the filler 15 filled in the grooves 14 from entering the region 13a where the blindfold film 13 is formed. It can be prevented from being added to the 13 colors.

  Next, a method for manufacturing the display device 1 will be described. First, a method for forming the blind film 13 on the protective plate 3 will be described with reference to FIG.

  First, a blue plate glass such as soda glass is cut into a predetermined size to prepare a protective plate 3 having a predetermined thickness over the entire surface (FIG. 3A). Next, a part of the surface 3a (hereinafter referred to as the first surface 3a) facing the display panel 2 is shaved so as to have a thickness smaller than that of the other region to form a groove 14 (concave portion) (FIG. 3 (B)). Specifically, for example, the protective plate 23 is installed on the cutting device 50 in which diamond powder is fixed to the tip of the drill 51 by an electrolytic plating method or an electroless plating method. At this time, the drill 51 has a tip that is the same width as the groove 14. Then, the groove 14 is formed by driving the cutting device 50 and cutting a part of the first surface 3 a of the protection plate 3 with the drill 51. At this time, the groove 14 is cut so as to have a frame shape that is connected together along each side of the protective plate 3 to form one closed region. The groove 14 is formed so as to surround the display area 4 in the display panel 2.

  After the formation of the grooves 14, microcracks and scratches are generated on the first surface 3 a of the protection plate 3. In order to remove this, it is preferable to polish the first surface 3a with a polishing apparatus after the formation of the grooves 14 and polish it. Examples of the abrasive used here include cerium oxide, zirconium oxide, and aluminum oxide. After polishing, the protective plate 3 is washed to remove the abrasive and glass powder. Thereafter, the protection plate 3 is subjected to a strengthening process by ion exchange.

Next, the groove 14 is filled with a resin colored in a predetermined color in the groove 14 as a filler 15. The filler 15 can be filled into the groove 14 using, for example, a dispenser 52 ((FIG. 3C). In this case, the filler 15 filled in the groove 14 is made of a resin that is soluble in a solvent. It is preferable to fill the groove 14 with a resin adjusted to a desired viscosity by being dissolved in a solvent, and then volatilize the solvent by heating.

  Next, the first surface 3a of the protection plate 3 is filled so that the inner periphery of the blindfold film 13 overlaps the formation region of the groove 14 and the inner periphery of the blindfold film 13 coincides with the outer periphery of the protection plate. A blindfold film 13 is formed by screen-printing a resin colored in the same color as the material 15 in a frame shape (FIG. 3D). In this case, the filler 15 filled in the groove 14 can use a resin that is soluble in a solvent, screen-printed with a resin adjusted to a desired viscosity by being dissolved in the solvent, and then heated. It is preferable to volatilize the solvent.

  Next, a method for joining the protective plate 3 on which the blindfold film 13 is formed to the display panel 2 will be described. First, a frame-shaped spacer 5 larger than the frame shape formed by the grooves 14 is prepared, and the spacer 5 is pasted on the blindfold film 13 by a pasting roller so that the spacer 5 overlaps the blindfold film 13.

Next, a transparent resin having both properties of the ultraviolet polymerizable and thermal properties in a region surrounded by the spacer 5 is supplied by a dispenser or the like, by pressurizing overlapping the display panel 2 thereon, transparent Resin is spread over the entire area surrounded by the spacers 5. Then, while maintaining the pressurized state at this time, the transparent resin is irradiated with ultraviolet rays for a certain period of time through the protective plate 3, and then the pressure is released and constant in the heating atmosphere maintained at the polymerization temperature of the transparent resin. The resin layer 6 is formed by being left for a time, and the protective plate 3 is bonded to the display panel 2. The spacer 5 is disposed so as to contact the second polarizing plate 10 in the display panel 2. Further, the transparent resin having both properties of the thermally polymerizable ultraviolet polymerizable, acrylate, acrylic monomers methacrylate, or such as an acrylic oligomer is a low polymer of one or both of acrylate and methacrylate It can be obtained by adding a curing initiator made of an organic peroxide such as a sulfonium salt to the alicyclic epoxy resin. As described above, a display device including a protective plate arranged so as to face the display panel can be formed.

  In the above-described embodiment, the case where the filler 15 and the blindfold film 13 have the same color has been described. However, the filler 15 and the blindfold film 13 may have different colors depending on the design. .

Further, in the above embodiment has been described as being formed along the groove 14 on the inner periphery of the blind film 13, as shown in FIG. 4, the groove 14, than the inner periphery of the blind film 13, Furthermore, it is good also as a structure formed in an outer peripheral side. That is, the groove 14 may be formed in a frame shape in a region that overlaps the blindfold 13 as appropriate according to the design.

  DESCRIPTION OF SYMBOLS 1 ... Display apparatus, 2 ... Display panel, 3 ... Protection board, 4 ... Display area, 5 ... Spacer, 6 ... Resin layer, 7, 8 ... Substrate, 9, 10 ... Polarizing plate, 12 ... Liquid crystal layer, 13 ... Blindfold Membrane, 14 ... groove, 15 ... filler

Claims (4)

A protective plate disposed so as to face the display panel,
To the display panel surface facing in said protective plate, and the blindfolded film so as to surround the display area of the display panel,
With
The protective plate is, together with the groove is formed in a region overlapping with the blind film, and filler to the groove is filled,
The filler is colored in the same color as the blindfold,
A display device characterized by that. The groove display device according to claim 1, characterized in that it is formed in a frame shape so as to surround the display area of the display panel. The protective plate is, the display device according to claim 1 or 2, characterized in that it consists of soda glass. The display device according to claim 1, wherein the groove is formed to a depth of ½ to 2/3 of the thickness of the protective plate.

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