WO2010092705A1 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- WO2010092705A1 WO2010092705A1 PCT/JP2009/066666 JP2009066666W WO2010092705A1 WO 2010092705 A1 WO2010092705 A1 WO 2010092705A1 JP 2009066666 W JP2009066666 W JP 2009066666W WO 2010092705 A1 WO2010092705 A1 WO 2010092705A1
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- WO
- WIPO (PCT)
- Prior art keywords
- display
- display device
- light
- protective plate
- display panel
- Prior art date
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- 230000001681 protective effect Effects 0.000 claims abstract description 79
- 239000004973 liquid crystal related substance Substances 0.000 claims description 35
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Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F19/00—Advertising or display means not otherwise provided for
- G09F19/12—Advertising or display means not otherwise provided for using special optical effects
- G09F19/14—Advertising or display means not otherwise provided for using special optical effects displaying different signs depending upon the view-point of the observer
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/50—Protective arrangements
Definitions
- the present invention relates to a display device. More specifically, the present invention relates to a display device provided with a protective plate for protecting the display panel.
- a display device for televisions, displays for personal computers, displays for portable terminals, etc. it has a display panel that displays images, a protective plate that protects the display panel from external impacts and dust, and a dimming effect
- a circularly polarizing plate is provided on the display panel in Patent Document 1, and in Patent Documents 2 to 4, it is provided in a region corresponding to the display panel of the protective plate.
- the protective plate is generally formed in the same or slightly larger size as the display panel as described in Patent Documents 2 to 4, but is much larger than the display panel as described in Patent Document 1. A formed one has also been proposed. Since these protective plates are usually located on the outermost layer on the viewing surface side of the display panel and constitute a part of the appearance of the display device, in recent years, not only the protection of the display panel but also the design is excellent. It is required to have appearance.
- Patent Document 1 discloses a configuration in which a circularly polarizing plate is provided on the surface of a display panel and a protective plate made of a smoke panel and a linearly polarizing plate is used to satisfy such a requirement.
- the display device having such a configuration uses a smoke panel, the display transmittance itself is lowered, which affects display characteristics. Further, since the appearance of the display device is limited in terms of gloss and the like by using the smoke panel, there is room for improvement in terms of design.
- the present invention has been made in view of the above-described present situation, and when it is not displayed, the display panel is difficult to be visually recognized. At the time of display, it is possible to visually recognize a display state in which an image is raised on a protective plate, and has excellent design.
- An object of the present invention is to provide a display device having an appearance.
- the present inventors have made various studies on display devices in which the display panel is difficult to be visually recognized when not displayed.
- the display device when not displayed is viewed from the normal direction to the main surface of the protective plate.
- a difference in the amount of light is caused by a difference in reflectance of external light, and generally, a light absorber, a reflector, and the like are provided in a region around the translucent portion. It turned out that it was difficult to make the reflectance uniform.
- the protective plate with a circularly polarizing plate that covers the light-transmitting portion and the surrounding area, it is possible to suppress the reflected light of outside light from being emitted from the inside of the display device to the outside of the protective plate surface.
- This makes it possible to align the reflectance of the external light in the light-transmitting part and the surrounding area, making it difficult to see the display panel when not displaying and displaying only the image floating on the protective plate when displaying
- the present invention is a display device comprising a display panel and a protective plate disposed closer to the observation surface than the display panel, wherein the display device has a light transmitting portion on the observation surface side of the display panel.
- the protective plate is a display device including a circularly polarizing plate that covers both the light-transmitting portion and a region around the light-transmitting portion when viewed from the normal direction of the main surface.
- the display panel is a liquid crystal panel, an organic EL panel, a plasma display panel (Plasma Display Panel, hereinafter referred to as PDP), a field emission display panel (Field Emission Display Panel, hereinafter referred to as FEDP), or the like. is there.
- PDP plasma display panel
- FEDP field emission display panel
- a protective plate is disposed on the observation surface side of the display panel.
- a display panel is housed in a housing, and the display panel and the housing are covered with a protective plate.
- the housing contains a backlight as a light source, a driver for driving the display panel, and the like in addition to the display panel.
- the shape, material, strength, and the like of the housing are not particularly limited, and are appropriately set according to the shape of the display panel, the intended use, and the like.
- the translucent portion arranged on the observation surface side of the display device is for allowing an image displayed on the display panel to be observed from the observation surface side, and may be an opening and is made of a transparent material. It may be a thing.
- the opening part of a light shielding member, the member which consists of transparent materials, etc. are mentioned, for example.
- the protective plate is a substrate disposed to protect the display panel from dust and / or impact, and is disposed closer to the observation surface than the display panel.
- the protective plate includes a circularly polarizing plate that covers the light transmitting portion and the surrounding area when viewed from the normal direction of the main surface.
- the attachment position of the circularly polarizing plate is not particularly limited, and may be provided on either the main surface of the protective plate on the display panel side or the main surface on the observation surface side.
- the circularly polarizing plate is generally composed of a combination of a linearly polarizing plate (polarizer) that separates linearly polarized light from non-polarized light and a linearly polarized light, for example, a ⁇ / 4 retardation plate.
- the polarizer may be provided on the main surface of the protective plate on the observation surface side
- the ⁇ / 4 retardation plate may be provided on the main surface of the protective plate on the display panel side.
- the protective plate is provided with the circularly polarizing plate that covers the translucent portion and the surrounding area, and in the present invention, the translucent portion on the surface of the protective plate and the reflection of external light in the surrounding region.
- the rate can be aligned. The reason for this will be described in detail below.
- the circularly polarizing plate when the circularly polarizing plate is provided on the main surface of the protective plate on the display panel side, external light entering the protective plate is converted into linearly polarized light by a polarizer, and thereafter, ⁇ / 4 By passing through the phase difference plate, it is converted into circularly polarized light.
- the converted circularly polarized light hits and reflects the display panel if it is a light-transmitting part, and hits and reflects a certain member if it is an area around the light-transmitting part. Even when the light absorber is provided in the area around the light transmitting part, most of the light hitting the light absorber is absorbed by the light absorber, but is slightly reflected.
- the light reflected by the display panel or the like as described above becomes reverse circularly polarized light, is converted into linearly polarized light by the ⁇ / 4 phase difference plate, and is absorbed by the polarizer. Therefore, almost no reflected light is emitted to the outside of the protective plate, and the influence of light from the inside of the display device on the surface of the protective plate is reduced.
- the reflectance of external light can be made equal to the surrounding area, and the light transmitting portion and the surrounding area can be seen uniformly, so that the display panel is hardly visually recognized.
- the display since the image appears to float on the protective plate from the non-display state where the translucent part and the surrounding area can be seen uniformly during display, the display has excellent design and good appearance. A device is obtained. Such an effect is obtained when the circularly polarizing plate is provided on the observation surface side of the protective plate or when it is provided separately on the ⁇ / 4 phase difference plate on the display panel side and the polarizer on the observation surface side. Is the same.
- the protective plate is on the surface corresponding to the light-transmitting portion when viewed from the normal direction of the main surface. It is preferable that the reflectance of the external light and the reflectance of the external light on the surface corresponding to the area around the translucent portion are substantially equal.
- the reflection chromaticity is also substantially equal when the surface corresponding to the light transmitting part and the surface corresponding to the region around the light transmitting part are substantially equal, This is preferable because it is difficult to visually recognize the display panel.
- the reflection chromaticity can be measured by using, for example, a spectrophotometer.
- a so-called reverse wavelength type retardation plate having a large phase difference with respect to long wavelength light can be used in order to suppress coloring of reflected light.
- the phase difference of the phase difference plate increases in accordance with each wavelength of incident light, and the ⁇ / 4 condition can be adjusted for each wavelength.
- the longer the wavelength of the light the larger the phase difference, so that the color is deliberately deviated from the ⁇ / 4 condition at each wavelength. be able to.
- a phase difference plate having a flat phase difference is used, such as a phase difference plate using a cycloolefin polymer resin film (manufactured by ZEON Corporation, trade name “ZEONOR”) to optimize the retardation value in green.
- ZEONOR cycloolefin polymer resin film
- the ⁇ / 4 condition in the vicinity of blue is met.
- green and red deviate from the ⁇ / 4 condition.
- the reflection becomes larger.
- the reflection color is shifted in the yellow direction, and at the time of display, it can be set so that the image protrudes from the entire yellow color tone.
- the leakage of reflected light in the vicinity of green which is the largest amount of natural light, occurs, which weakens the effect of making it difficult to visually recognize the display panel when not displayed.
- the color tone is not particularly limited, and can be appropriately adjusted depending on the wavelength dispersion characteristic of the retardation plate and the magnitude of the retardation.
- the presence of the circularly polarizing plate provided around the light transmitting portion of the protective plate can be easily verified by measuring the phase difference with a phase difference measuring device, for example.
- the circularly polarizing plate covers both the translucent part and the area around the translucent part. It is not always necessary to cover the entire area around the translucent part.
- the arrangement region can be determined according to the design applied to the protective plate, the shape of the housing, etc. within the range where the effects of the present invention can be obtained, and the circularly polarizing plate is not provided on a part of the protective plate. There may be areas.
- the protective plate is made of a transparent member
- the display device further has a light shielding member in a region around the light transmitting part.
- the transparent member serving as the protective plate for example, a resin plate made of acrylic resin, polycarbonate resin, or the like, a glass substrate, or the like can be used.
- the protective plate may be colorless or colored.
- the display device can display an image having a color tone as displayed on the display panel.
- the protective plate is colored, the display device can display the image displayed on the display panel as an image changed to a color tone such as blue or red.
- the thickness of the protective plate is not particularly limited. Depending on the strength of the display panel to be protected, it is desirable to have a thickness that can maintain the strength required for the protective plate.
- the shape of the protective plate when viewed from the normal direction is not particularly limited, and in addition to the rectangular shape, an elliptical shape, a rectangular shape with rounded corners, a shape in which a rectangular shape and an elliptical shape are combined. Etc.
- the surface of the protective plate may be subjected to a surface treatment such as a hard coat treatment.
- the light shielding member examples include a member containing a black absorber.
- the display device including the light shielding member can hide drivers, wirings, and the like disposed around the display panel, and has an appearance with excellent design.
- the display when the display is not displayed, it is difficult for an observer to visually recognize the display panel, and the entire surface of the protective plate becomes black.
- the display When the display is displayed, an image appears to protrude from the black background.
- a portable terminal such as a mobile phone or a portable game machine, a stylish appearance excellent in design can be obtained, and if it is a display for a TV or a personal computer, a good appearance suitable for interior can be obtained. .
- the protective plate further includes an antireflection film having a nanostructure formed on the main surface opposite to the side on which the display panel is disposed, thereby suppressing light reflection on the surface of the protective plate.
- a moth-eye structure is mentioned as a nanostructure.
- a preferable form of the display device according to the present invention includes a form in which a resin is filled between the display panel and the protective plate. If foreign matter enters the gap between the display panel and the protective plate, the foreign matter may disturb the polarization state and appear to shine during display. However, if a resin is filled between the display panel and the protective plate, Can be prevented.
- the resin to be filled is preferably a transparent resin so as not to decrease the transmittance.
- the haze of the resin is preferably 1% or less, and more preferably 0.1% or less.
- the kind of resin is not specifically limited, For example, a thermosetting resin, a photocurable resin, etc. are mentioned.
- the thermosetting resin include acrylic resins, urethane acrylic resins, and epoxy resins.
- the photocurable resin include an ultraviolet curable resin and a visible light curable resin. Since the refractive index of the optical member used for the display panel is usually around 1.5, an acrylic photo-curable resin is preferable in order to reduce the difference in refractive index.
- the display panel is preferably a liquid crystal panel.
- a liquid crystal panel has a configuration in which a liquid crystal layer is sandwiched between a pair of substrates.
- a polarizing plate is provided on at least the observation surface side of the liquid crystal panel.
- the circularly polarizing plate provided on the protective plate can be used as a polarizing plate disposed on the observation surface side of the liquid crystal panel, it is not always necessary to provide a polarizing plate on the observation surface side of the liquid crystal panel, and as a whole apparatus Since the number of polarizing plates to be used can be reduced, cost can be reduced.
- the display panel may be an organic electroluminescence display panel.
- the display device of the present invention it is possible to provide a display device having an excellent appearance that allows the display panel to be hardly visible when not displayed, and to display a display state in which an image appears on the protective plate when displayed. it can.
- FIG. 1 is a schematic cross-sectional view illustrating a configuration of a display device according to the present embodiment.
- FIG. 2 is a schematic plan view of the display device shown in FIG. 1 when viewed from the normal direction with respect to the substrate surface.
- FIG. 2A shows a display state, and FIG. Each state is shown.
- a display device 100 illustrated in FIG. 1 includes a liquid crystal panel 10 as a display panel, a housing 50 that houses the liquid crystal panel 10, and a protective plate 30 that is disposed closer to the observation surface than the liquid crystal panel 10.
- the housing 50 and the protection plate 30 are integrally formed with an adhesive layer 80 interposed therebetween.
- the liquid crystal panel 10 may be either an active matrix type or a passive matrix type.
- the active matrix type liquid crystal panel 10 is used.
- the circularly polarizing plate 15 is provided on the main surface opposite to the observation surface of the liquid crystal panel 10, but the circularly polarizing plate is not provided on the main surface on the observation surface side of the liquid crystal panel 10.
- the circularly polarizing plate 15 includes a ⁇ / 4 retardation plate and a polarizer arranged in this order from the liquid crystal panel 10 side.
- the protection plate 30 includes a transparent member 31 made of an acrylic resin plate having a refractive index of 1.5 and a thickness of 0.8 mm, a circularly polarizing plate 32, and a light shielding member 33.
- the main surface on the observation surface side of the protection plate 30 is constituted by a transparent member 31, and this surface is subjected to a hard coat process.
- a circularly polarizing plate 32 is attached to the entire surface.
- the circularly polarizing plate 32 includes a polarizer and a ⁇ / 4 retardation plate arranged in this order from the transparent member 31 side.
- a recess is formed at the center of the housing 50, and the liquid crystal panel 10 is accommodated in the recess.
- the outer wall portion of the housing 50 is attached to the light shielding member 33 of the protection plate 30 via the adhesive layer 80.
- the light shielding member 33 is made of a 10 ⁇ m thick acrylic paint film colored in black.
- an air layer 45 is provided as a light transmitting part.
- outside light that has entered the protection plate 30 passes through the transparent member 31 as it is and passes through the circularly polarizing plate 32 during non-display.
- external light is first converted into linearly polarized light in the polarizer constituting the circularly polarizing plate 32, and then converted from linearly polarized light into circularly polarized light by passing through the ⁇ / 4 retardation plate.
- the converted circularly polarized light passes through the air layer 45 as it is and is reflected on the surface of the liquid crystal panel 10. At this time, the rotation direction of the light is reversed and is incident on the circularly polarizing plate 32 again. In the circularly polarizing plate 32, the circularly polarized light is reconverted into linearly polarized light by the ⁇ / 4 retardation plate and then absorbed by the polarizer.
- the light shielding member 33 In the region where the light shielding member 33 is provided, most of the light is absorbed by the light shielding member 33, but part of the circularly polarized light is reflected by the surface of the light shielding member 33 and enters the circularly polarizing plate 32 again. As in the case of the region where the light shielding member 33 is not provided, the light is absorbed by the circularly polarizing plate 32.
- the display area 41 corresponding to the air layer 45 is brightened and displayed as shown in FIG.
- the non-display area 42 corresponding to the light shielding member 33 appeared black.
- the display area 41 and the non-display area 42 are substantially the same black, and the entire surface of the protective plate 30 appears to be an integral black color. It was not visually recognized. Note that the white wavy line in FIG. 2B is shown for convenience in order to show the display area 31, and in fact, the boundary between the display area 31 and the non-display area 32 is not visible.
- the reflectance of the light irradiated to the protective plate 30 at the time of non-display is measured, the reflectance of the display area 41 is 4.18%, and the reflectance of the non-display area 42 is 4.15%.
- the reflectances of both were almost equal.
- the surface reflectance of only the protective plate 30 subjected to the hard coat treatment was measured, the surface reflectance was 4%. Therefore, the reflection of light irradiated on the protective plate 30 was mainly caused by the surface of the protective plate 30. It was clarified that there was almost no reflection inside the display device.
- the reflectance was measured using a spectrophotometer (manufactured by Konica Minolta, model number “CM2002”) by receiving light in a direction shifted by 8 ° from the normal direction to the substrate surface of the protective plate 30.
- the circularly polarizing plate 20 covers both the air layer 45 and the surrounding area, most of the external light incident on the protective plate 30 is absorbed during non-display. As a result, a product having a good appearance as described above was obtained.
- the protective plate 30 was configured to cover not only the liquid crystal panel 10 but also the entire panel arrangement surface side of the housing 50, a flat appearance was obtained on the observation surface side of the display device 100. Furthermore, since the protective plate 30 is colored black by the light shielding member 40, the driver, wiring, etc. arranged around the display panel can be hidden when not displayed.
- the display device 100 can provide a stylish appearance when used in the field of portable terminals such as mobile phones and portable game machines, and can be designed for interiors when used for a television or personal computer display. A good appearance can be obtained.
- FIG. 3 is a schematic cross-sectional view showing a configuration of a display device according to Embodiment 2 of the present invention.
- the translucent part provided between the liquid crystal panel 10 and the protective plate 30 is configured by the air layer 45 (opening of the light shielding member 33).
- a transparent material is used. It is composed. That is, in FIG. 3, the display device 300 includes a filling member 60 that fills a gap between the liquid crystal panel 10 and the protection plate 30.
- the filling member 60 an acrylic resin that is a transparent material was used.
- the reflectance of the display device 300 configured as described above was measured in the same manner, the reflectance of the display region 31 was 4.18%, and the reflectance of the non-display region 32 was 4.15%. It was. Further, since the filling member 60 is a colorless and transparent layer, the displayed image can be satisfactorily viewed at the time of display. Further, when the display was not performed, light was not scattered by the foreign matter, and a good black display could be obtained.
- FIG. 4 is a schematic cross-sectional view showing a configuration of a display device according to Embodiment 3 of the present invention.
- the display device 400 is provided with an antireflection film 70 on the main surface of the protection plate 30 in addition to the configuration of the display device 100 shown in FIG. 1.
- the antireflection film 70 is a film having a surface structure (moth eye structure) in which numerous nanometer-sized protrusions exist.
- the antireflection film 70 is a film having a thickness of 10 ⁇ m formed of a photocurable acrylic resin, and a projection having a height of 200 nm is formed on the surface.
- the display device 400 configured as described above has excellent display quality at the time of display because the antireflection film 70 can remarkably suppress surface reflection on the protective plate 30.
- the reflectance of the display area and the non-display area at the time of non-display was measured, the reflectance of the display area was 0.24%, and the reflectance of the non-display area was 0.20%.
- the reflectance of the display area and the non-display area is substantially equal, the display area and the non-display area become substantially the same black when not displayed, and the entire surface of the protection plate 30 is integrated.
- the display device 400 having a good appearance was obtained because the area where the liquid crystal panel 10 was arranged was not easily seen, because it looked black.
- the filling member 60 may be provided instead of the air layer 45 as in the second embodiment.
- the circularly polarizing plate 32 is provided on the entire surface of the protective plate 30.
- the present invention is not limited to this, and the circularly polarizing plate 32 is provided on a part of the protective plate 30. There may be areas that are not.
- the display devices 100, 300, and 400 may use an organic EL panel, PDP, or FEDP instead of the liquid crystal panel 10. That is, the display device 100 may be an organic EL display, a PDP display, or an FEDP display.
- FIG. 5 is a schematic cross-sectional view showing the configuration of the display device according to this comparative embodiment
- FIG. 6 is a schematic plan view when the display device shown in FIG. 5 is viewed from the normal direction with respect to the substrate surface. , (A) shows the display state, and (b) shows the non-display state.
- a display device 500 illustrated in FIG. 5 includes a liquid crystal panel 510, a housing 550 that accommodates the liquid crystal panel 510, and a protective plate 530 that is disposed closer to the observation surface than the liquid crystal panel 510.
- the housing 550 and the protection plate 530 are integrally configured with an adhesive layer 580 interposed therebetween.
- the liquid crystal panel 510 has the same configuration as that of the liquid crystal panel 10, but a circularly polarizing plate 520 is provided on the observation surface side, and a circularly polarizing plate 515 is provided on the main surface opposite to the observation surface.
- the circularly polarizing plate 515 includes a ⁇ / 4 retardation plate and a polarizer arranged in this order from the liquid crystal panel 510 side.
- the circularly polarizing plate 520 includes a polarizer and a ⁇ / 4 retardation plate arranged in this order from the protective plate 530 side.
- a recess is formed in the center of the housing 550, and the liquid crystal panel 510 is accommodated in the recess.
- the protective plate 530 includes a transparent acrylic resin plate 531 having a refractive index of 1.5 and a thickness of 0.8 mm, and a light shielding member 532 made of an acrylic resin plate having a thickness of 10 ⁇ m and colored black. Consists of.
- the light shielding member 532 is provided so as to surround an air layer 560 as a light transmitting portion provided on the observation surface side of the liquid crystal panel 510.
- the light that passes through the air layer 560 out of the external light incident on the protective plate 530 is converted into linearly polarized light by the polarizer that constitutes the circularly polarizing plate 520, and then ⁇ It is converted into circularly polarized light by passing through the / 4 retardation plate.
- the converted circularly polarized light is reflected on the surface of the liquid crystal panel 510. At this time, since the rotation direction of the light is reversed and enters the ⁇ / 4 retardation plate again, most of the light is absorbed by the polarizer.
- the display area 541 corresponding to the air layer 560 is brightened and image display is performed.
- the non-display area 542 corresponding to the light shielding member 532 looks black, when not displayed, the display area 541 looks grayish due to the reflection of light hitting the light shielding member 532 as shown in FIG. 6B.
- the liquid crystal panel 510 was firmly visible.
- the reflectance of the protective plate 530 at the time of non-display was measured, the reflectance of the display region 541 was 8.2%, and the reflectance of the non-display region 542 was 6.5%.
- the surface reflectance of only the protective plate 530 subjected to the hard coat treatment was measured, the surface reflectance was 4%.
- the display device in addition to the reflection generated on the surface of the protective plate 530, the display device It is considered that the reflection generated inside is emitted to the outside.
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Abstract
Description
図1及び図2を用いて、本実施形態に係る表示装置の構成を説明する。図1は、本実施形態に係る表示装置の構成を示す断面模式図である。図2は、図1に示す表示装置を基板面に対して法線方向から見たときの平面模式図であり、図2(a)は表示時の状態を、図2(b)は非表示時の状態をそれぞれ示す。
図3は、本発明の実施形態2に係る表示装置の構成を示す断面模式図である。上記実施形態1では、液晶パネル10と保護板30との間に設けられた透光部は空気層45(遮光部材33の開口)で構成されていたが、本実施形態では、透明材料にて構成している。すなわち、図3において表示装置300は、液晶パネル10と保護板30との間にギャップを充填する充填部材60を有する。充填部材60としては、透明材料であるアクリル樹脂を用いた。
図4は、本発明の実施形態3に係る表示装置の構成を示す断面模式図である。図4において表示装置400は、図1に示す表示装置100の構成に加えて、保護板30の主面上に反射防止膜70が設けられている。反射防止膜70は、ナノメートルサイズの突起物が無数に存在する表面構造(モスアイ構造)を有する膜である。反射防止膜70は、光硬化性のアクリル樹脂にて形成された膜厚10μmの膜であって、表面には、高さ200nmの突起物が形成されている。
図5及び図6を用いて、本発明に対する比較形態に係る表示装置を説明する。図5は、本比較形態に係る表示装置の構成を示す断面模式図であり、図6は、図5に示す表示装置を基板面に対して法線方向から見たときの平面模式図であり、(a)は表示時の状態を、(b)は非表示時の状態をそれぞれ示す。
15、32、515、532 円偏光板
30、530 保護板
31 透明部材
33、532 遮光部材
41、541 表示領域
42、542 非表示領域
45、560 空気層
50、550 筐体
60 充填部材
70 反射防止膜
80、580 接着剤層
100、300、400、500 表示装置
531 透明アクリル樹脂板
Claims (7)
- 表示パネルと、該表示パネルよりも観察面側に配置された保護板とを備える表示装置であって、
該表示装置は、該表示パネルの観察面側に透光部を有し、
該保護板は、主面の法線方向から見て、該透光部、及び、該透光部の周囲の領域の両方を覆った円偏光板を備えることを特徴とする表示装置。 - 前記保護板は、主面の法線方向から見て、前記透光部に対応する表面における外光の反射率と前記透光部の周囲の領域に対応する表面における外光の反射率とが実質的に等しいことを特徴とする請求項1記載の表示装置。
- 前記保護板は、透明部材からなり、
前記表示装置は、前記透光部の周囲の領域に遮光部材を更に有することを特徴とする請求項1又は2記載の表示装置。 - 前記表示パネルと前記保護板との間に樹脂が充填されていることを特徴とする請求項1~3のいずれかに記載の表示装置。
- 前記保護板は、前記表示パネルが配置された側とは反対側の主面上に、ナノ構造が形成された反射防止膜を更に有することを特徴とする請求項1~4のいずれかに記載の表示装置。
- 前記表示パネルは、液晶パネルであることを特徴とする請求項1~5のいずれかに記載の表示装置。
- 前記表示パネルは、有機エレクトロルミネセンス表示パネルであることを特徴とする請求項1~5のいずれかに記載の表示装置。
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CN2009801565618A CN102317993A (zh) | 2009-02-13 | 2009-09-25 | 显示装置 |
US13/138,254 US20110279757A1 (en) | 2009-02-13 | 2009-09-25 | Display device |
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PCT/JP2009/066666 WO2010092705A1 (ja) | 2009-02-13 | 2009-09-25 | 表示装置 |
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US (1) | US20110279757A1 (ja) |
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WO (1) | WO2010092705A1 (ja) |
Cited By (5)
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JP2011150960A (ja) * | 2010-01-25 | 2011-08-04 | Nippon Seiki Co Ltd | 発光装置 |
JP2013029601A (ja) * | 2011-07-27 | 2013-02-07 | Mitsubishi Electric Corp | 表示装置 |
JP2016161761A (ja) * | 2015-03-02 | 2016-09-05 | 日本精機株式会社 | 表示装置 |
JP2019117223A (ja) * | 2017-12-26 | 2019-07-18 | 大日本印刷株式会社 | パネル付き表示装置 |
JP2021531494A (ja) * | 2018-07-12 | 2021-11-18 | コーニング インコーポレイテッド | 色合わせのために作られたデッドフロント |
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KR101951320B1 (ko) * | 2012-02-07 | 2019-02-22 | 삼성전자주식회사 | 가변 초점 렌즈 |
TW201409092A (zh) * | 2012-08-17 | 2014-03-01 | Chunghwa Picture Tubes Ltd | 偏光板及其觸控液晶面板和觸控顯示器 |
CN102955191A (zh) * | 2012-10-12 | 2013-03-06 | 华映视讯(吴江)有限公司 | 偏光板及其触控液晶面板和触控显示器 |
TWI673513B (zh) * | 2014-09-26 | 2019-10-01 | 日商大日本印刷股份有限公司 | 抗反射膜、顯示裝置及顯示裝置之抗反射膜之選擇方法 |
CN105045436A (zh) * | 2015-09-15 | 2015-11-11 | 京东方科技集团股份有限公司 | 显示面板及其制备方法、显示装置 |
JP7187990B2 (ja) * | 2018-11-01 | 2022-12-13 | 大日本印刷株式会社 | 樹脂成形体の製造方法 |
JP2020148820A (ja) * | 2019-03-11 | 2020-09-17 | 株式会社ジャパンディスプレイ | 表示装置及び表示装置の製造方法 |
TWI784679B (zh) * | 2021-08-19 | 2022-11-21 | 友達光電股份有限公司 | 顯示裝置 |
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JP2007199522A (ja) * | 2006-01-27 | 2007-08-09 | Nippon Zeon Co Ltd | 光学積層体の製造方法 |
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2009
- 2009-09-25 WO PCT/JP2009/066666 patent/WO2010092705A1/ja active Application Filing
- 2009-09-25 CN CN2009801565618A patent/CN102317993A/zh active Pending
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JP2007199522A (ja) * | 2006-01-27 | 2007-08-09 | Nippon Zeon Co Ltd | 光学積層体の製造方法 |
US20090015901A1 (en) * | 2007-07-10 | 2009-01-15 | Seiko Epson Corporation | Display device and electronic apparatus |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011150960A (ja) * | 2010-01-25 | 2011-08-04 | Nippon Seiki Co Ltd | 発光装置 |
JP2013029601A (ja) * | 2011-07-27 | 2013-02-07 | Mitsubishi Electric Corp | 表示装置 |
JP2016161761A (ja) * | 2015-03-02 | 2016-09-05 | 日本精機株式会社 | 表示装置 |
JP2019117223A (ja) * | 2017-12-26 | 2019-07-18 | 大日本印刷株式会社 | パネル付き表示装置 |
JP7135318B2 (ja) | 2017-12-26 | 2022-09-13 | 大日本印刷株式会社 | パネル付き表示装置 |
JP2021531494A (ja) * | 2018-07-12 | 2021-11-18 | コーニング インコーポレイテッド | 色合わせのために作られたデッドフロント |
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US20110279757A1 (en) | 2011-11-17 |
CN102317993A (zh) | 2012-01-11 |
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