JP2006189715A - Protective cover for display panel, and its use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective cover for a display panel, whose cost is low and which has excellent anti-reflection property, and to provide its use. <P>SOLUTION: The protective cover 1 includes a transparent substrate 10 and a transparent medium layer 11 for anti-reflection and is placed so that the transparent medium layer 11 for anti-reflection is brought into close contact with the screen of the display panel 2, and the refractive index N<SB>1</SB>of the transparent medium layer 11 for anti-reflection satisfies following general formula (1): No<N<SB>1</SB><Ns<SP>2</SP>(where, No is the diffraction index of air, and Ns is the diffraction index of the transparent substrate 10). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a protective cover for a display panel that is low in cost and excellent in antireflection properties and a digital still camera as an application thereof.

In recent years, various devices including liquid crystal display devices such as digital still cameras have become widespread. However, the screen of the liquid crystal display device has a problem that when it receives an impact, it is damaged and the appearance is damaged, or the display function is lost due to damage. Therefore, for example, Japanese Patent Laid-Open No. 2003-302620 (Patent Document 1) discloses a liquid crystal display device including a protective cover 100 arranged so that the transparent substrate 10 faces the screen 20 of the liquid crystal panel 21 as shown in FIG. Disclosure. However, in this liquid crystal display device, since the transparent substrate 10 is supported by the frame portion 30 provided in the frame portion 32 of the protective cover 100, there is a space 50 between the transparent substrate 10 and the screen 20. Therefore, reflected light X ₁ and X ₂ are generated with respect to the incidence of the external light X at the interface between the front surface of the transparent substrate 10 and the outer air layer and at the interface between the rear surface of the transparent substrate 10 and the inner air layer, and the image is generated. Visibility will be reduced.

  JP-A-5-11239 (Patent Document 2) includes a liquid crystal panel 21 having a polarizing plate 22 and a protective cover 101 disposed so as to face the polarizing plate 22, as shown in FIG. An external light antireflection layer 112 made of a liquid material is interposed between the polarizing plate 22 and the protective cover 101, and the material constituting each of the polarizing plate 22, the protective cover 101, and the external light antireflection layer 112 is almost the same. A liquid crystal display having the same refractive index is proposed. However, Patent Document 2 does not specifically describe what range means “substantially the same refractive index”, and the material constituting the external light antireflection layer 112 is also described as an oily material. It does not describe the specific material.

JP2003-302620 JP 5-11239 A

  Accordingly, an object of the present invention is to provide a protective cover for a display panel that is low in cost and excellent in antireflection properties and its use.

  As a result of intensive studies in view of the above object, the present inventors have provided a protective cover having a transparent substrate and an antireflection transparent medium layer, the refractive indexes of which are adjusted to each other, and the antireflection transparent medium layer has The inventors have found that when the display panel is placed in close contact with the screen, excellent antireflection properties can be obtained at a low cost, and the present invention has been conceived.

That is, the display panel protective cover of the present invention has a transparent substrate and an antireflection transparent medium layer, and is arranged so that the antireflection transparent medium layer is in close contact with the screen of the display panel. The refractive index N ₁ of the antireflection transparent medium layer is represented by the following general formula (1):
No <N ₁ <Ns ² ... (1)
(Where No is the refractive index of air and Ns is the refractive index of the transparent substrate).

  The transparent substrate is preferably attached to the display panel via an annular seal pattern having a shape along the peripheral edge thereof. The antireflection transparent medium is preferably filled in a space sealed by the transparent substrate, the display panel, and the annular seal pattern. The transparent substrate is preferably made of polymethyl methacrylate resin or polycarbonate resin. The antireflection transparent medium is preferably made of water or an ultraviolet curable acrylate resin.

  The transparent substrate preferably has an antiglare treatment layer on its rear surface. The transparent substrate preferably has an antireflection layer on the front surface. It is preferable that the transparent substrate has a dark paint layer at a peripheral end portion thereof. The display panel is preferably a liquid crystal module in which a screen is formed by liquid crystal sealed between opposing substrates.

  The protective cover for display panel of the present invention is suitable for digital still camera applications.

  The protective cover of the present invention has a transparent substrate and an antireflection transparent medium layer, and these refractive indexes are adjusted to each other, so that the antireflection transparent medium layer is placed in close contact with the display panel screen. Then, excellent antireflection properties can be obtained at a low cost. The protective cover of the present invention having such excellent characteristics is suitable for protecting a liquid crystal module incorporated in a digital still camera.

  The structure of the protective cover of the present invention will be described with reference to the accompanying drawings. The same reference numerals are given to the same parts as those shown in FIGS. 13 and 14 unless otherwise specified. Therefore, please refer to the description of the protective cover shown in FIGS.

[1] Display panel protective cover FIGS. 1 and 2 show an example of the display panel protective cover of the present invention. In this example, the protective cover 1 is provided in the liquid crystal module 2 incorporated in the digital still camera. The protective cover 1 includes a transparent substrate 10 and an antireflection transparent medium layer 11, and the antireflection transparent medium layer 11 is disposed so as to be in close contact with the screen 20 of the liquid crystal module 2. The liquid crystal module 2 includes a liquid crystal panel (liquid crystal cell) in which a screen is formed by liquid crystal sealed between opposing substrates, a driver IC for driving, a controller for controlling the driver IC, and other electronic components. The printed circuit board, the backlight, and the like are provided, and the structure thereof is publicly known, and thus the description thereof is omitted.

  The back cover 3 is provided with a frame portion 30 that supports the transparent substrate 10. The transparent substrate 10 is attached to the liquid crystal module 2 via an annular seal pattern 4 provided along the edge 31 of the frame portion 30. The transparent substrate 10 is also bonded to the frame portion 30 at the rear surface of the peripheral end portion. The transparent medium 11 is filled in a space 50 sealed by the transparent substrate 10, the liquid crystal module 2, and the seal pattern 4. By providing the seal pattern 4, even when the transparent medium 11 is in a liquid state, it is reliably sealed.

  FIG. 3 shows another example of the protective cover for a display panel of the present invention. In addition, the same reference number is attached | subjected to the same member or part as the example shown in FIG. In this example, the antireflection transparent medium layer 11 includes a transparent adhesive layer 111a, a film-like transparent medium layer 110, and a transparent adhesive layer 111b.

[2] Layer structure of protective cover for display panel
(1) Transparent substrate The material constituting the transparent substrate 10 is not limited, but for example, polymethacrylate resin (refractive index: 1.45 to 1.53), polycarbonate (PC) resin (refractive index: 1.55 to 1.6, Visible light transmittance: 90%), cellulose triacetate resin (refractive index: 1.50, visible light transmittance: 90%), amorphous polyolefin resin (refractive index: 1.53), quartz glass (refractive index: 1.46), various inorganic materials Examples thereof include glass (refractive index: 1.45 to 1.85). Among these materials, polymethacrylate resin or PC resin, which is low cost and excellent in transparency, is preferable, and polymethyl methacrylate (PMMA) resin (refractive index: 1.48 to 1.52, visible light transmittance: 93%) is preferable. More preferred.

  The thickness of the transparent substrate 10 may be set as appropriate according to the desired strength and the like. When the protective cover 1 is used for a digital still camera, it is usually 0.5 to 1 mm.

  The transparent substrate 10 is preferably subjected to an antiglare treatment on its rear surface (surface on the antireflection transparent medium layer 11 side). However, the antiglare treatment is not limited to being performed only on the rear surface. Examples of the antiglare treatment method include a method of coating the transparent substrate 10 with organic or inorganic fine particles, a method of chemically treating and / or physically treating the transparent substrate 10, a method of applying an antiglare film to the transparent substrate 10, and the like. A well-known method is mentioned. Examples of the organic fine particles include polystyrene fine particles and acrylic resin fine particles. Examples of the inorganic fine particles include silica fine particles. These organic and / or inorganic fine particles are coated on the transparent substrate 10 using a binder. Examples of the binder include PMMA resin and amorphous fluororesin. As the chemical treatment, for example, there is a method of treating the transparent substrate 10 with a chemical or the like. Examples of the physical treatment include a method of blasting the transparent substrate 10. Examples of the antiglare film include a transparent film containing organic and / or inorganic fine particles as described above, and an embossed transparent film.

In order to reduce the decrease in light transmittance, the refractive index N ₂ of the antiglare layer is expressed by the following general formula (2):
0.01 ≦ | N ₂ −N ₁ | ≦ 1.0 (2)
It is preferable that N ₁ is in a range satisfying (where N ₁ is the refractive index of the antireflection transparent medium 11).

The transparent substrate 10 is preferably provided with an antireflection film on the front surface (the front surface in FIG. 1). The antireflection film may be a known one, and may be appropriately selected according to the refractive index of the material constituting the transparent substrate 10. When the transparent substrate 10 is made of PMMA, examples of the antireflection film material include inorganic materials such as MgF ₂ (refractive index: 1.38) and silica airgel (refractive index: 1.05 to 1.35). The antireflection film is usually required to be composed of only one layer, but may be composed of a plurality of layers having different refractive indexes as required. The antireflection film may be composed of only an inorganic material, or may be composed of a composite layer in which inorganic fine particles are dispersed in a binder. Examples of the binder include PMMA resin and amorphous fluororesin.

  When the antireflection film is made of only an inorganic material, it can be formed by a physical vapor deposition method such as a vapor deposition method, a sputtering method, or an ion plating method, or a chemical vapor deposition method such as thermal CVD, plasma CVD, or photo CVD. The inorganic fine particle-binder composite layer can be formed by a wet method such as a dip coating method, a spin method, a spray method, a roll coating method, or a screen printing method. The resin layer can be formed by a chemical vapor deposition method or a wet method.

  If necessary, the transparent substrate 10 may have an antistatic layer, a hard coat layer, an antifouling coat layer, an antifogging coat layer, a conductive layer, and the like on the front surface.

  As shown in FIGS. 1 and 2, the transparent substrate 10 is preferably provided with an annular dark coating layer 12 on the peripheral edge of the front surface so as to cover the seal pattern 4, thereby improving the aesthetic appearance. The dark paint layer 12 can be provided by screen printing, for example. The color of the dark paint layer 12 may be appropriately set depending on the color of the camera body. Specifically, black is mentioned, for example. The dark paint layer 12 is not necessarily limited to being provided at the peripheral end portion of the front surface of the transparent substrate 10, and may be provided at the peripheral end portion of the rear surface as necessary.

(2) Antireflection transparent medium The antireflection transparent medium 11 has a refractive index N ₁ of the following general formula (1):
No <N ₁ <Ns ² ... (1)
(Where No is the refractive index of air and Ns is the refractive index of the protective cover). When the refractive index N ₁ of the antireflection transparent medium 11 satisfies the above formula (1), an excellent antireflection effect can be obtained.

The refractive index N ₁ of the antireflection transparent medium 11 is represented by the following general formula (3):
1.1 × No <N ₁ <0.9 × Ns ² ... (3)
(However, No and Ns are the same as those in formula (1)). It is preferable to satisfy the following general formula (4):
1.2 × No <N ₁ <0.8 × Ns ² ... (4)
(However, No and Ns are the same as those in formula (1)).

The visible light transmittance of the antireflection transparent medium 11 is not limited, but is preferably 70% or more, and more preferably 85% or more. The thickness of the antireflection transparent medium layer 11 is made to coincide with the distance d ₁ between the transparent substrate 10 and the liquid crystal module 2. For example, in the case of a digital still camera, the spacing d ₁ it is typically 0.2 to 0.5 mm.

The antireflection transparent medium 11 is not particularly limited as long as its refractive index N ₁ satisfies the above formula (1), and may be either liquid or solid (including gel). Specifically, as the transparent medium 11 for antireflection, water (refractive index: 1.33), acrylate resin (refractive index: 1.45 to 1.57), nitrocellulose resin (refractive index: 1.46 to 1.51, visible light transmittance: 90) %), Cellulose triacetate resin (refractive index: 1.50, visible light transmittance: 90%), cellulose acetate butyrate resin (refractive index: 1.47, visible light transmittance: 87%), cellulose tributyrate resin (refractive index: 1.48, visible light transmittance: 91%), polyvinyl chloride resin (refractive index: 1.53, visible light transmittance: 70%), polystyrene (PS) resin (refractive index: 1.59 to 1.60, visible light transmittance: 90%) ), Polyethylene terephthalate (PET) resin (refractive index: 1.65, visible light transmittance: 87%), PC resin (refractive index: 1.55-1.6, visible light transmittance: 90%), amorphous polyolefin resin (refractive index) : 1.53), polyvinyl alcohol resin (refractive index: 1.49) To 1.52), polyethylene glycol resin (refractive index: 1.45 to 1.46), epoxy resin (refractive index: 1.55 to 1.61), tetraacetyl cellulose (TAC) (refractive index: 1.47), polysulfone (PSF) (refractive index: 1.63) ) And the like.

  Among them, as the antireflection transparent medium 11, acrylate resins that are water and ultraviolet curable are preferable. As the acrylate resin, epoxy acrylate, urethane acrylate, polyester acrylate, and acrylic resin acrylate are more preferable. The acrylate resin is not limited to a homopolymer of (meth) acrylates, and may be a copolymer with another unsaturated monomer. Examples of other unsaturated monomers include styrene.

(3) Transparent adhesive layer Examples of the transparent adhesives 111a and 111b shown in FIG.

(4) Reflectance The protective cover 1 according to a preferred embodiment of the present invention has a reflectance of 6% or less in the visible light region.

[3] Method for Attaching Protective Cover A method for attaching the protective cover of the present invention to the display panel will be described below, taking as an example the case of attaching to a liquid crystal module incorporated in a digital still camera. As shown in FIG. 4A, an opening 5 is provided in a portion of the back cover 3 of the digital still camera that faces the screen 20 of the liquid crystal module 2.

  As shown in FIG. 4B, an annular seal pattern 4 is provided along the edge portion 31 of the frame portion 30. The sealing material 4 is preferably an ultraviolet curable resin such as an acrylate resin. As shown in FIG. 4 (c), the transparent substrate 10 is bonded to the front surface of the frame portion 30. At the same time, the transparent substrate 10 is stacked on the liquid crystal module 2 through the uncured sealing material 4 to cure the sealing material 4. In this way, a space 50 for filling the liquid transparent medium 11 is formed.

  As shown in FIGS. 4C and 5, the transparent substrate 10 is provided with holes 13 for injecting the liquid transparent medium 11 and drain holes 14 inside the seal pattern 4. By providing the holes 14 in the transparent substrate 10, when the liquid transparent medium 11 is press-fitted from the holes 13, the space 50 can be filled without remaining bubbles. As shown in FIG. 4C, the holes 13 and 14 are preferably provided in the region where the annular dark paint layer 12 is provided. If necessary, as shown in FIG. 6, the supply pipe 41 is inserted into the hole 13 through the rubber packing 40 without any gap, and the discharge pipe 42 is inserted into the hole 14 through the rubber packing 40 without any gap. The transparent medium 11 may be press-fitted from the supply pipe 41. If necessary, the discharge pipe 42 may be connected to a vacuum suction means such as a vacuum pump, and the liquid transparent medium 11 may be press-fitted while the space 50 is evacuated.

  In the case of using an ultraviolet curable acrylate resin as the transparent medium 11, the space 50 is filled in a liquid state to which a photopolymerization initiator is added without using a solvent. As the photopolymerization initiator, known ones such as acetophenones, benzoins, benzophenones, and thioxanthones may be used.

  After the liquid transparent medium 11 is filled into the space 50, as shown in FIG. 7, the holes 13 and 14 are filled with adhesives 43, 43 and are sealed by curing. The adhesive 43 is not particularly limited, but an ultraviolet curable adhesive is preferable in that it is instantly solidified by irradiation with ultraviolet rays. Examples of the ultraviolet curable adhesive 43 include acrylic adhesives and epoxy adhesives. As the acrylic adhesive, a PMMA adhesive is preferable. When the transparent medium 11 is an ultraviolet curable acrylate resin, the holes 13 and 14 as well as the space 50 may be filled with an acrylate resin to which a photopolymerization initiator is added, and then UV cured integrally.

  The transparent substrate 10 does not necessarily need to be provided with the discharge hole 14, and may be provided with only the injection hole 13 as shown in FIG. 8 (a). In this case, as shown in FIG. 8 (b), the liquid transparent medium 11 is used by using an exhaust / supply pipe 45 provided with a cock 44 capable of switching between the exhaust line 42 and the line 41 for supplying the liquid transparent medium 11. Is filled into the space 50. The exhaust / supply pipe 45 is inserted into the hole 13 through the rubber packing 40 without any gap, and the cock 44 is communicated with the exhaust line 42 to make the space 50 vacuum. Thereafter, as shown in FIG. 8 (c), the cock 44 is communicated with the supply line 41 to fill the space 50 with the liquid transparent medium 11. Next, as shown in FIG. 8 (d), the hole 13 is sealed with the adhesive 43 in the same manner as described above.

  As shown in FIGS. 7 and 8 (d), the surface of the portion sealed with the adhesive 43 is preferably coated with the same ink as the annular dark coating layer 12 at the peripheral edge of the transparent substrate 10.

  When the protective cover 1 having the film-like transparent medium layer 110 as shown in FIG. 3 is attached to the liquid crystal module 2, the transparent adhesive layer 111b, the film-like transparent medium layer 110, The transparent adhesive layer 111a and the transparent substrate 10 may be laminated.

  The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Example 1
One surface of a PMMA resin substrate (thickness: 0.7 mm) was coated with polystyrene fine particles using PMMA resin as a binder to form an antiglare film (refractive index of the antiglare film: 1.49). Next, after providing a hole for injecting a liquid antireflection transparent medium and a hole for drain as shown in FIG. 4 (c), the peripheral edge portion was painted black. The obtained transparent substrate with holes was attached to a liquid crystal module incorporated in a digital still camera by the procedure shown in FIGS. 4A to 4C so that the surface having the antiglare film was inside. A PMMA adhesive was used for the adhesive medium between the camera back cover and the transparent substrate and the annular seal pattern, and this was cured by irradiating with a 200 W high-pressure mercury lamp for 30 seconds. 6 and 7, water was filled in the space formed by the transparent substrate, the liquid crystal module, and the annular seal pattern (interval between the transparent substrate and the liquid crystal screen: 0.35 mm). The injection hole and drain hole of the transparent substrate were sealed with a PMMA adhesive. When the reflectance of the obtained protective cover was measured by a spectral reflection method, it was 5% or less with respect to light having a wavelength of 400 to 700 nm as shown in FIG.

Example 2
A transparent substrate with holes was prepared in the same manner as in Example 1 except that a PC resin substrate was used and the antiglare treatment was performed with a sand blaster. The obtained transparent substrate with holes was attached to a liquid crystal module incorporated in a digital still camera in the same manner as in Example 1. 6 and 7, an epoxy acrylate resin containing a photopolymerization initiator is added to the space formed by the transparent substrate, the liquid crystal screen, and the seal pattern (interval between the transparent substrate and the liquid crystal screen: 0.35 mm). Filled. After filling the injection hole and drain hole of the transparent substrate with epoxy acrylate resin, the filled epoxy acrylate resin was cured by irradiating ultraviolet rays with a 200 W high pressure mercury lamp for 30 seconds. When the reflectance of the obtained protective cover was measured by a spectral reflection method, it was 6% or less with respect to light having a wavelength of 400 to 700 nm as shown in FIG.

Example 3
Same as Example 1 except that a PC resin substrate with a MgF ₂ film formed on one side by vacuum deposition to a thickness of λ / 4 (λ = 500 nm) was used, and the antiglare treatment was applied to the opposite side with a sand blaster. Thus, a transparent substrate with holes was prepared. The obtained transparent substrate with holes was attached to a liquid crystal module incorporated in a digital still camera in the same manner as in Example 1. 6 and 7, an epoxy acrylate resin containing a photopolymerization initiator is added to the space formed by the transparent substrate, the liquid crystal screen, and the seal pattern (interval between the transparent substrate and the liquid crystal screen: 0.35 mm). Filled. After filling the injection hole and drain hole of the transparent substrate with epoxy acrylate resin, the filled epoxy acrylate resin was cured by irradiating with UV light with a 200 W high pressure mercury lamp for 30 seconds. When the reflectance of the obtained protective cover was measured by a spectral reflection method, it was 2% or less with respect to light having a wavelength of 400 to 700 nm as shown in FIG.

Comparative Example 1
In the same manner as in Example 1, a transparent substrate made of PC resin having an antiglare film formed on one surface was produced. The peripheral edge was painted black. The transparent substrate provided with the coating part was attached to the liquid crystal module incorporated in the digital still camera so that the surface having the antiglare film was on the inside (interval between the transparent substrate and the liquid crystal screen: 0.35 mm). When the reflectance of the obtained protective cover was measured by a spectral reflection method, it exceeded 7% for light having a wavelength of 400 to 700 nm as shown in FIG. It was clearly inferior.

It is a rear view which shows an example of the digital still camera equipped with the protective cover of the present invention. It is AA sectional drawing of FIG. It is a partial expanded sectional view which shows another example of the digital still camera equipped with the protective cover of the present invention. (a) is a partially enlarged rear view and a partially enlarged sectional view showing an opening of a digital still camera, and (b) is a state where an annular seal pattern is provided on the liquid crystal module of the digital still camera shown in FIG. It is the partial expanded rear view and partial expanded sectional view which are shown, (c) is the partial expanded rear view and partial expanded sectional view which show the state which mounted | wore the liquid crystal module through the cyclic | annular seal pattern shown in FIG.4 (b). It is. FIG. 5 is a partially enlarged cross-sectional view illustrating an example of a method of filling an antireflection transparent medium into a space formed by the transparent substrate, the liquid crystal module, and the annular seal pattern shown in FIG. FIG. 5 is a partially enlarged cross-sectional view showing another example of a method for filling an antireflection transparent medium into a space formed by the transparent substrate, the liquid crystal module, and the annular seal pattern shown in FIG. FIG. 5 is a partial enlarged cross-sectional view showing a state in which an antireflection transparent medium is sealed in a space formed by the transparent substrate, the liquid crystal module, and the annular seal pattern shown in FIG. FIG. 9A is a partially enlarged cross-sectional view showing a state where a transparent substrate having only one hole is mounted on a liquid crystal module through the annular seal pattern shown in FIG. 4B, and FIG. It is a partial expanded sectional view which shows a mode that the space formed by the transparent substrate shown in a), a liquid crystal module, and a cyclic | annular seal pattern is exhausted, (c) is the transparent substrate shown in FIG. 8 (a), a liquid crystal module, and a cyclic | annular seal. It is a partial expanded sectional view which shows a mode that the transparent medium for reflection prevention is filled into the space formed of the pattern, (d) is the space formed of the transparent substrate, the liquid crystal module, and the annular seal pattern shown in FIG. It is a partial expanded sectional view which shows the state by which the transparent medium for reflection prevention was sealed. 6 is a graph showing the reflectance of the protective cover of Example 1. It is a graph which shows the reflectance of the protective cover of Example 2. 10 is a graph showing the reflectance of the protective cover of Example 3. 10 is a graph showing the reflectance of the protective cover of Comparative Example 1. It is sectional drawing which shows the example of the conventional protective cover with which the liquid crystal panel was mounted | worn. It is a partial expanded sectional view which shows another example of the conventional protective cover with which the liquid crystal panel was mounted | worn.

Explanation of symbols

1,100,101 ・ ・ ・ Protective cover
10 ... Transparent substrate
11 ... Anti-reflection transparent medium layer
110 ・ ・ ・ Transparent transparent media layer
111a, 111b ... Transparent adhesive layer
12 ... Dark paint layer
13, 14 ... holes 2 ... liquid crystal module
20 ... LCD screen
21 ... LCD panel
22 ... Polarizing plate 3 ... Camera back cover
30 ... Frame part
31 ... Edge of frame
32 ... Frame part 4 ... Annular seal pattern
40 ・ ・ ・ Rubber packing
41 ... Liquid transparent medium supply pipe
42 ... Drain pipe
43 ・ ・ ・ Sealant for sealing
44 ... Cock
45 ... exhaust / supply pipe 5 ... opening
50 ... space
112 ・ ・ ・ External light antireflection layer

Claims (8)

A protective cover having a transparent substrate and an antireflection transparent medium layer, the antireflection transparent medium layer being disposed in close contact with a screen of a display panel, wherein the refractive index of the antireflection transparent medium layer N ₁ is the following general formula (1):
No <N ₁ <Ns ² ... (1)
(Where No is the refractive index of air and Ns is the refractive index of the transparent substrate). The protective cover for a display panel according to claim 1, wherein the transparent substrate is attached to the display panel via an annular seal pattern having a shape along a peripheral edge thereof, and the transparent medium for antireflection is the transparent A protective cover for a display panel, which is filled in a space sealed by a substrate, the display panel, and the annular seal pattern. 3. The display panel protective cover according to claim 1, wherein the transparent substrate is made of a polymethyl methacrylate resin or a polycarbonate resin, and the antireflection transparent medium is made of water or an ultraviolet curable acrylate resin. Protective cover for display panel. The protective cover for display panels in any one of Claims 1-3 WHEREIN: It has a glare-proof process layer in the rear surface of the said transparent substrate, The protective cover for display panels characterized by the above-mentioned. The display panel protective cover according to claim 1, further comprising an antireflection layer on a front surface of the transparent substrate. The display panel protective cover according to any one of claims 1 to 5, further comprising a dark paint layer at a peripheral end portion of the transparent substrate. 7. The display panel protective cover according to claim 1, wherein the display panel is a liquid crystal module having a screen formed of liquid crystal sealed between opposing substrates. Protective cover. A digital still camera comprising the display panel protective cover according to claim 1.

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