WO2010131387A1 - 表示装置 - Google Patents
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- WO2010131387A1 WO2010131387A1 PCT/JP2010/000356 JP2010000356W WO2010131387A1 WO 2010131387 A1 WO2010131387 A1 WO 2010131387A1 JP 2010000356 W JP2010000356 W JP 2010000356W WO 2010131387 A1 WO2010131387 A1 WO 2010131387A1
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- display device
- plate
- light
- liquid crystal
- phase difference
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- 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
- G02F1/13338—Input devices, e.g. touch panels
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- 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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
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- 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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n
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- 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
- G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
- G02F2413/02—Number of plates being 2
Definitions
- the present invention relates to a display device provided with an optical sensor element in a display panel.
- Flat panel display devices typified by liquid crystal display devices, have features such as thin and light weight and low power consumption. Furthermore, technological development is progressing to improve display performance such as colorization, high definition, and video compatibility. It is out. Therefore, it is currently incorporated in a wide range of electronic devices such as mobile phones, PDAs, DVD players, mobile game devices, notebook PCs, PC monitors, TVs, and the like.
- Patent Document 1 discloses a liquid crystal display device in which an optical sensor element made of a photodiode is provided on a pixel region.
- a function as an area sensor specifically, a scanner function, a touch panel function, etc.
- a touch panel (or scanner) integrated display device can be realized.
- the optical sensor element in the panel recognizes the input position by detecting the user's finger or pen contacting the panel surface as an image.
- the output value of the light sensor element is the output of the ambient light sensor that detects the brightness of ambient light. It is desired that the value is almost the same as the value and a constant value.
- the optical sensor element also detects the reflected light, so that the output value of the optical sensor element changes according to the brightness of the display image. As described above, the output value obtained in the optical sensor element changes under the influence of the display image, so that the detection accuracy of the input position is greatly lowered.
- the display image when the display image is bright, the display image is reflected at the interface of each layer such as a protective plate and an acrylic plate disposed in the apparatus, and the output value of the optical sensor element is affected by this reflected light, and is actually Therefore, a high output value is obtained at a location different from the input position. As a result, the area sensor erroneously recognizes the input position.
- Patent Document 2 two transparent conductive substrates on which a transparent conductive film is formed are arranged so that the transparent conductive films face each other, and two sheets are pressed by pressing the upper transparent conductive substrate.
- a transparent touch panel is disclosed in which a transparent conductive substrate is brought into contact with each other to detect a position. And when this transparent touch panel is mounted on the liquid crystal panel, in order to prevent external light from being reflected by the touch panel and making the display image of the liquid crystal panel difficult to see, ⁇ / 4 is formed on the upper transparent conductive substrate. It is disclosed that a retardation plate is provided.
- the present invention has been made in view of the above problems, and realizes a display device with an optical sensor that can suppress reflection of light caused by a display image and detect an input position with higher accuracy. With the goal.
- a display device includes a display panel including a plurality of photosensor elements, and the photosensor elements detect images on the surface of the apparatus, thereby allowing input from the outside.
- a display device having an area sensor function for detecting a position, wherein a polarizing plate is provided on an image display surface side of the display panel, and ⁇ / A four-phase difference plate is provided.
- the image display surface side of the polarizing plate means the surface side of the polarizing plate opposite to the surface facing the display panel.
- the ⁇ / 4 retardation plate is provided on the polarizing plate, light resulting from the display image of the display panel is reflected on the surface of the device or the like based on the following principle. Light can be blocked.
- (1) When the light from the display panel passes through the polarizing plate, it becomes linearly polarized light (for example, linearly polarized light in the horizontal direction).
- (2) When the linearly polarized light of (1) passes through the ⁇ / 4 retardation plate, it becomes clockwise circularly polarized light.
- the circularly polarized light of (2) is reflected by, for example, the surface of the display device or a finger, it becomes counterclockwise circularly polarized light.
- the combination of the polarizing plate and the ⁇ / 4 retardation plate prevents light reflected from the image display without passing through the surface of the display device from entering the display panel. Can do. Therefore, the output value obtained in the optical sensor element can be prevented from changing due to the influence of the reflected light from the display image, and the input position can be detected with higher accuracy.
- the specular reflection component of the reflected light from an object that inputs on the surface of the device such as a finger or an input pen can be blocked. It can prevent that detection sensitivity falls under the influence of the reflected light from an input target object.
- the display device includes a display panel including a plurality of photosensor elements, and the photosensor elements have an area sensor function of detecting an input position from the outside by detecting an image on the device surface.
- a polarizing plate is provided on the image display surface side of the display panel, and a ⁇ / 4 retardation plate is provided on the image display surface side of the polarizing plate. It is characterized by that.
- FIG. 3 is a schematic diagram illustrating a schematic configuration of the liquid crystal display device illustrated in FIG. 2 and an optical path of reflected light at an interface in the device. It is sectional drawing which shows the structure of the liquid crystal display device concerning the 1st Embodiment of this invention.
- (A) is a schematic diagram showing the configuration of the liquid crystal display device of the present invention provided with a broadband ⁇ / 4 retardation plate, and (b) is a comparison without a broadband ⁇ / 4 retardation plate.
- FIG. 1 is a schematic diagram which shows the coordinate axis for demonstrating the positional relationship of each optical axis of a polarizing plate and a phase difference plate
- (b) is a schematic for demonstrating the angle of each optical axis in XY plane.
- FIG. 1 In the liquid crystal display device shown in FIG. 1, it is a schematic diagram showing that reflected light is blocked by a combination of a polarizing plate and a broadband ⁇ / 4 retardation plate.
- (A) is a figure which shows an example of the image displayed on the liquid crystal display device shown in FIG.
- (B) is a figure which shows the image which an optical sensor element recognizes when the image shown to (a) is displayed in the liquid crystal display device of the comparative example in which the broadband ⁇ / 4 phase difference plate is not provided.
- (C) is a figure which shows the image which an optical sensor element recognizes when the image shown to (a) is displayed in the liquid crystal display device of this invention provided with the broadband (lambda) / 4 phase difference plate.
- It is a schematic diagram which shows the schematic structure of the liquid crystal display device shown in FIG. 10, and the optical path of the reflected light in the interface in this device.
- FIG. 1 It is sectional drawing which shows the structure of the liquid crystal display device concerning the 2nd Embodiment of this invention. It is a schematic diagram which shows the modification of the liquid crystal display device shown in FIG. It is a schematic diagram which shows schematic structure of the self-light-emitting display device concerning the 3rd Embodiment of this invention, and the optical path of the reflected light in the interface in this device. It is a schematic diagram which shows the modification of the self-light-emitting display apparatus shown in FIG.
- a touch panel integrated liquid crystal display device having an area sensor function (specifically, a touch panel function) will be described.
- the configuration of the touch panel integrated liquid crystal display device of the present embodiment will be described with reference to FIG.
- the touch panel integrated liquid crystal display device 100 (also simply referred to as the liquid crystal display device 100) shown in FIG. 2 is a touch panel that detects an input position by detecting an image on the surface of a device by a plurality of two-dimensionally arranged photosensor elements. It has a function.
- the touch panel integrated liquid crystal display device 100 of the present embodiment includes a liquid crystal panel 20 and a backlight 10 that is provided on the back side of the liquid crystal panel 20 and emits light to the liquid crystal panel. Yes.
- the backlight 10 is provided with a plurality of white LEDs as light sources.
- the liquid crystal panel 20 includes an active matrix substrate 21 in which a large number of pixels are arranged in a matrix, and a counter substrate 22 disposed so as to face the active matrix substrate 21. Further, a display medium is provided between the two substrates. A certain liquid crystal layer 23 is sandwiched.
- the display mode of the liquid crystal panel 20 is not particularly limited, and any display mode such as a TN mode, an IPS mode, and a VA mode can be applied.
- a front side polarizing plate 40a (a polarizing plate provided on the image display surface side) and a back side polarizing plate 40b are provided so as to sandwich the liquid crystal panel 20.
- Each polarizing plate 40a and 40b serves as a polarizer.
- the polarization direction of the front-side polarizing plate 40a and the polarization direction of the back-side polarizing plate 40b are arranged so as to have a crossed Nicol relationship.
- a normally black mode liquid crystal display device can be realized.
- a broadband ⁇ / 4 phase difference plate 50 is disposed on the front-side polarizing plate 40a.
- a TAC film 60 is disposed on the broadband ⁇ / 4 retardation plate 50.
- a protective plate 90 is disposed on the outermost surface 100a of the liquid crystal display device 100 (that is, the detection target surface 100a). And the TAC film 60 and the protective plate 90 are arrange
- the active matrix substrate 21 is provided with a TFT (not shown), which is a switching element for driving each pixel, an alignment film (not shown), an optical sensor element 30 and the like.
- the counter substrate 22 is provided with a color filter layer 24 and a counter electrode and an alignment film (not shown).
- the color filter layer is composed of colored portions having respective colors of red (R), green (G), and blue (B), and a black matrix.
- the optical sensor element 30 is provided in each pixel region, thereby realizing an area sensor.
- the optical sensor element 30 reads the position and inputs information to the device. Can be executed.
- the touch panel function can be realized by the optical sensor element 30.
- the optical sensor element 30 is formed of a photodiode or a phototransistor, and detects the amount of received light by flowing a current corresponding to the intensity of received light.
- the TFT and the optical sensor element 30 may be monolithically formed on the active matrix substrate 21 by substantially the same process. That is, some constituent members of the optical sensor element 30 may be formed simultaneously with some constituent members of the TFT.
- Such a method for forming an optical sensor element can be performed in accordance with a conventionally known method for manufacturing a liquid crystal display device incorporating an optical sensor element.
- the photosensor element is not necessarily provided for each pixel.
- a photosensor is provided for each pixel having any one color filter of R, G, and B. It may be a configuration.
- ⁇ d is generally 50 nm to 60 nm.
- the protective plate 90 is disposed on the outermost surface of the liquid crystal display device 100 on the image display surface side, and protects the device.
- the protection plate 90 is made of a transparent material such as acrylic, polycarbonate, or PET.
- the air layer 80 between the TAC film 60 and the protective plate 90 is formed by fixing the TAC film 60 and the protective plate 90 apart by a certain distance, for example, by a transparent double-sided adhesive film sheet or the like. Has been.
- the liquid crystal display device 100 is provided with a liquid crystal drive circuit for driving display on the liquid crystal panel 20 and an area sensor control unit for driving the area sensor. Yes. Note that conventionally known configurations can be applied to the configurations of the liquid crystal driving circuit and the area sensor control unit of the present embodiment.
- the optical sensor element formed in the liquid crystal panel 20 when a finger or an input pen touches the surface (detection target surface 100a) of the device. 30 can detect an input position by capturing a finger or an input pen as an image.
- the liquid crystal display device 100 includes the broadband ⁇ / 4 retardation plate 50 on the front-side polarizing plate 40a, thereby reflecting light caused by display images including light of various wavelengths. Since the light component can be prevented from being detected by the optical sensor element 30, the input position can be detected with higher accuracy. This point will be described below.
- FIG. 1 schematically shows the configuration of each layer constituting the liquid crystal display device 100.
- the broadband ⁇ / 4 retardation plate 50 has a configuration in which a ⁇ / 2 retardation plate 50b and a ⁇ / 4 retardation plate 50a are stacked in this order from the front polarizing plate 40a side.
- the ⁇ / 2 phase difference plate is a phase difference plate that changes the polarization state of light transmitted through itself by 1 ⁇ 2 wavelength, and is also simply referred to as a ⁇ / 2 plate.
- the ⁇ / 4 phase difference plate is a phase difference plate that changes the polarization state of light transmitted through itself by 1 ⁇ 4 wavelength, and is also simply referred to as a ⁇ / 4 plate.
- FIG. 3 shows a configuration of the present invention in which the broadband ⁇ / 4 retardation plate 50 is provided (FIG. 3A) and a configuration of a comparative example in which the broadband ⁇ / 4 retardation plate 50 is not provided ( FIG. 3B is compared with FIG.
- liquid crystal display device 100 and the liquid crystal display device 101 In the liquid crystal display device 100 and the liquid crystal display device 101, light emitted from the light source in the backlight 10 is transmitted through the liquid crystal panel 20 to form a display image. Part of the light based on the display image is reflected on the outermost surface 100a or 101a of the apparatus, the interface between the protective plate 90 and the air layer 80, the interface between the air layer 80 and the TAC film 60, and the finger.
- the reflected image is reflected and returned to the liquid crystal panel 20. It is detected by the optical sensor element 30 in 20. Thereby, since the optical sensor element 30 detects an image according to the display image, the detection accuracy of the input position is lowered.
- the liquid crystal display device 100 provided with the broadband ⁇ / 4 phase difference plate 50 shown in FIG. 3A, most of the light reflected from each interface and finger in the device is on the front side. It cannot pass through the polarizing plate 40a. Therefore, it is possible to prevent the optical sensor element 30 from detecting reflected light from the display image.
- the transmission axis of the polarizing plate is along the X-axis direction.
- the state in which the light incident on the polarizing plate is reflected and returns toward the polarizing plate is shown in order (1) to (5). Below, it demonstrates along this order.
- (1) When light from the display panel passes through the polarizing plate, it becomes linearly polarized light in the X-axis direction.
- (2) When the linearly polarized light of (1) passes through the ⁇ / 4 retardation plate, it becomes clockwise circularly polarized light.
- the circularly polarized light of (2) is reflected by, for example, the surface of a liquid crystal display device or a finger, it becomes counterclockwise circularly polarized light.
- the optical sensor element can be prevented from detecting the reflected light. Note that only the regular reflection light is blocked by the polarizing plate according to the above principle, and the scattered reflection light is not blocked.
- the reflected light is only a specularly reflected light component
- the crossing angle between the transmission axis of the polarizing plate and the optical axis (slow axis) of the ⁇ / 4 retardation plate is 45 degrees
- the linearly polarized light 4) is polarized in a direction perpendicular to the transmission axis (X-axis direction) of the polarizing plate, and the reflected light is completely blocked by the polarizing plate.
- the crossing angle goes away from 45 degrees, the blocking ratio of reflected light decreases.
- the present invention is not limited to this, and the slow axis of the 1 / 4 ⁇ phase difference plate is arranged to be inclined to some extent with respect to the transmission axis of the polarizing plate (that is, the slow axis and the transmission axis are If the slow axis and the transmission axis are not orthogonal to each other (not parallel), a certain degree of reflected light reduction effect can be obtained.
- a ⁇ / 2 phase difference plate 50b is provided between the front side polarizing plate 40a and the ⁇ / 4 phase difference plate 50a, and the optical axis of the ⁇ / 2 phase difference plate 50b ( The slow axis) and the optical axis (slow axis) of the ⁇ / 4 retardation plate 50a are arranged so as to cross each other. As a result, it is possible to convert linearly polarized light into circularly polarized light for light other than 550 nm light.
- each phase difference plate such that the optical axis (slow axis) of the ⁇ / 4 phase difference plate and the optical axis (slow axis) of the ⁇ / 2 phase difference plate have a predetermined positional relationship, Conversion from linearly polarized light to circularly polarized light is possible for a wider band of wavelengths.
- a preferable positional relationship will be described.
- the coordinate axes are defined as shown in FIG.
- the polarizing plate and each phase difference plate are arranged along the XY plane, and the light beam travels along the Z axis. That is, the X axis and the Y axis are orthogonal axes in the plane of the polarizing plate and each retardation plate, and the Z axis is an axis extending in the thickness direction of the polarizing plate and each retardation plate.
- the direction of the optical axis (transmission axis) of the polarizing plate and the optical axis (slow axis) of the phase difference plate is an angle in which the right direction from the Y axis in the XY plane is positive, as shown in FIG. It is defined by ⁇ . That is, the positive direction of the Y axis is defined as 0 degree, and the positive direction of the X axis is defined as 90 degrees.
- the ⁇ / 4 retardation plate 50a, the ⁇ / 2 retardation plate 50b, and the front polarizing plate 40a are arranged in this order of arrangement.
- the angle ⁇ of each optical axis in FIG. 5B is 20 degrees for the ⁇ / 4 phase difference plate 50a, 75 degrees for the ⁇ / 2 phase difference plate 50b, and 90 degrees for the front polarizing plate 40a (that is, Each layer is arranged so as to be in the (X-axis direction).
- the linearly polarized light emitted from the front-side polarizing plate 40a undergoes different conversion for each wavelength by passing through the ⁇ / 2 phase difference plate 50b, and then ⁇ / 4 The light enters the phase difference plate 50a.
- light having a wide wavelength range specifically, visible light having a wavelength of 400 nm to 700 nm
- the ⁇ / 4 retardation plate 50a is converted into circularly polarized light.
- the positional relationship between the optical axis (slow axis) of the ⁇ / 4 retardation plate and the optical axis (slow axis) of the ⁇ / 2 retardation plate is not necessarily limited to the above example. In addition to this, for example, with reference to the technique described in Patent Document 3, it can be arranged in the following positional relationship.
- the ⁇ / 2 retardation plate and the ⁇ / 4 retardation plate have their optical axes (slow axis) intersecting with each other, and the intersection angle p satisfies 50 ° ⁇ p ⁇ 70 °. It is preferable to arrange
- the ⁇ / 4 retardation plate and the ⁇ / 2 retardation plate are made of the same material, and at least one of these retardation plates is positioned.
- Nx, ny, and nz are nx> ny and (nx ⁇ ) where nx, xy are the refractive indexes in the orthogonal axis in the plane of the retardation plate, and nz is the refractive index in the thickness direction of the retardation plate.
- nz) ⁇ (nx ⁇ ny) (or (nx ⁇ nz) / (nx ⁇ ny) ⁇ 1).
- the refractive indexes nx, ny, and nz can also be referred to as refractive indexes in directions corresponding to the coordinate axes (X axis, Y axis, and Z axis) shown in FIG.
- the liquid crystal display device 100 Since the liquid crystal display device 100 according to the present embodiment has the above-described configuration, as shown in FIG. 6, the light (of the display image) reflected by each interface of the liquid crystal display device and the finger or the like. It is possible to prevent the regular reflection component) from being blocked by the front polarizing plate 40 a and returning to the liquid crystal panel 20. Note that (1) to (5) in FIG. 6 correspond to (1) to (5) in FIG. 4 described above.
- FIG. 7 shows an example of effects obtained by the liquid crystal display device 100 having the broadband ⁇ / 4 retardation plate 50.
- FIG. 7A shows an example of an image (specifically, a map image) displayed on the liquid crystal display device 100.
- FIG. 7C shows an image recognized by the optical sensor element when the image shown in FIG. 7A is displayed in the liquid crystal display device 100 of the present invention.
- FIG. 7B shows light when the image shown in FIG. 7A is displayed on a liquid crystal display device not provided with a broadband ⁇ / 4 retardation plate. The image which a sensor element recognizes is shown. Note that the sensor images shown in FIGS. 7B and 7C are obtained when no finger or the like touches the surface of the apparatus.
- the sensor image reflects the map image displayed on the liquid crystal panel. Therefore, even though the finger is not touched, for example, the optical sensor value of the portion corresponding to the road on the map increases to 100/256 gradations, and it is erroneously recognized that the finger is touching. there is a possibility.
- the entire display of the panel is hardly affected by the image displayed on the liquid crystal panel.
- the optical sensor value in the region is about 17/256 gradations. Since the optical sensor value when the finger touches is about 100/256 gradation values of 17/256 gradations or more, erroneous recognition due to the influence of the display image can be prevented.
- FIG. 8 shows a schematic configuration of a liquid crystal display device 200 which is a modification of the liquid crystal display device 100 shown in FIG.
- the liquid crystal display device 200 is not provided with the air layer 80 and the protection plate 90. Further, the TAC film 60 shown in FIG. 8 may not be provided.
- Other configurations are the same as those of the liquid crystal display device 100.
- the broadband ⁇ / 4 retardation plate 50 is provided, since the broadband ⁇ / 4 retardation plate 50 is provided, light based on the display image reflected on the surface of the device cannot pass through the front polarizing plate 40a. It is possible to prevent the sensitivity from being lowered due to the influence of the reflected light from the input object.
- the liquid crystal display device 100 has a higher effect of the present invention.
- the interface on which the display image can be reflected in the device is only the device surface, whereas in the liquid crystal display device 100, there are three interfaces on which the display image can be reflected ( Specifically, the interface between the TAC film 60 and the air layer 80, the interface between the air layer 80 and the protection plate 90, and the interface between the protection plate 90 and the air layer (that is, three interfaces: the device surface 100a)) Because.
- the reflected light removal effect by providing the broadband ⁇ / 4 retardation plate 50 is higher in the liquid crystal display device 100 than in the liquid crystal display device 200.
- a transparent resin layer may be formed instead of the air layer 80.
- the air layer 80 when the air layer 80 is formed, the refractive index difference at each interface increases, and the amount of reflected light at each interface increases. Therefore, the reflected light generated by providing the broadband ⁇ / 4 retardation plate 50 is increased. Reduction effect is increased.
- a touch panel integrated liquid crystal display device that has an infrared light source in a backlight and detects an input position when an optical sensor element detects infrared light will be described.
- FIG. 10 shows a configuration of the touch panel integrated liquid crystal display device 300 of the present embodiment.
- the touch panel integrated liquid crystal display device 300 (also simply referred to as the liquid crystal display device 300) shown in FIG. 10 is formed by detecting an image of the device surface 300a (detection target surface) by a plurality of two-dimensionally arranged photosensor elements. It has a touch panel function to detect the input position.
- members having the same configurations and functions as those of the liquid crystal display device 100 of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
- the touch panel integrated liquid crystal display device 300 of the present embodiment includes a liquid crystal panel 20 a and a backlight 11 that is provided on the back side of the liquid crystal panel 20 a and irradiates the liquid crystal panel with light. Yes.
- the liquid crystal panel 20a is a liquid crystal panel with a built-in infrared light sensor.
- the backlight 11 is provided with a plurality of white LEDs and a plurality of infrared LEDs as light sources.
- the infrared LED emits light having a wavelength in the infrared region, but in the present embodiment, in particular, the wavelength that transmits the infrared light transmission filter (infrared light transmission unit) 32 in the liquid crystal panel 20a. What emits infrared light in the region is used.
- the liquid crystal panel 20a includes an active matrix substrate 21 in which a large number of pixels are arranged in a matrix, and a counter substrate 22 disposed so as to face the active matrix substrate 21, and a display medium between the two substrates. A certain liquid crystal layer 23 is sandwiched.
- a front side polarizing plate 40c (a polarizing plate provided on the image display surface side) and a back side polarizing plate 40d are provided so as to sandwich the liquid crystal panel 20a.
- a broadband ⁇ / 4 retardation plate 50 is disposed on the front-side polarizing plate 40c.
- a TAC film 60 is disposed on the broadband ⁇ / 4 retardation plate 50.
- a protective plate 90 is disposed on the outermost surface 300a of the liquid crystal display device 300 (that is, the detection target surface 300a). And the TAC film 60 and the protective plate 90 are arrange
- the active matrix substrate 21 is provided with a TFT (not shown) that is a switching element for driving each pixel, a pixel electrode 26, a data signal line 27, an alignment film 28, an optical sensor element 31, and the like.
- a TFT (not shown) that is a switching element for driving each pixel, a pixel electrode 26, a data signal line 27, an alignment film 28, an optical sensor element 31, and the like.
- the optical sensor element 31 is formed of a photodiode or a phototransistor, and detects the amount of received light by flowing a current corresponding to the intensity of received light.
- the photosensor element 31 is provided in the vicinity of the pixel electrode 26 corresponding to the blue coloring portion 24 b of the color filter layer 24.
- an infrared light transmission filter 32 is provided inside the blue coloring portion 24 b, and light from the surface 300 a side of the apparatus reaches the optical sensor element 31 through the infrared light transmission filter 32. It is the composition which does.
- the infrared light transmission filter 32 is a filter that selectively transmits infrared light.
- the infrared light transmission filter 32 is not necessarily required to completely block visible light as long as it is provided for the purpose of transmitting infrared light and blocking visible light. % May be permeated. Since the infrared light transmission filter 32 is provided on the optical sensor element 31, the optical sensor element 31 functions as an infrared light sensor that detects the amount of infrared light.
- a color filter layer 24, a counter electrode 25, an alignment film 28, and the like are formed on the counter substrate 22.
- the color filter layer is composed of colored portions 24r, 24g, and 24b having respective colors of red (R), green (G), and blue (B), and a black matrix 24m.
- the TAC film 60, the air layer 80, and the protective plate 90 the same ones as those of the liquid crystal display device 100 can be applied.
- the liquid crystal display device 300 Since the liquid crystal display device 300 has the above-described configuration, when an object such as a finger or an input pen touches the detection target surface 300a, the liquid crystal display device 300 is irradiated from the infrared LED in the backlight 11. The reflected infrared light is reflected by the object, and the light sensor element 31 can detect the reflected infrared light. Therefore, it is possible to detect which position on the detection target surface is touched by the intensity of infrared light detected by each optical sensor element 31.
- the liquid crystal display device 300 includes the broadband ⁇ / 4 phase difference plate 50, similarly to the liquid crystal display device 100, the reflection of light caused by the display image is suppressed and the input position is detected with high accuracy. It is possible to obtain a display device that can be used. This point will be described with reference to FIG.
- the broadband ⁇ / 4 phase difference plate 50 has a configuration in which a ⁇ / 2 phase difference plate 50b and a ⁇ / 4 phase difference plate 50a are stacked in this order from the front polarizing plate 40a side. . This point is the same as the configuration of the liquid crystal display device 100.
- the configurations of the front-side polarizing plate 40c and the back-side polarizing plate 40d are partially different from the configuration of the liquid crystal display device 100.
- the front-side polarizing plate 40a and the back-side polarizing plate 40b provided in the liquid crystal display device 100 are polarizing plates used in general liquid crystal panels, and convert light having a wavelength in the visible light region into linearly polarized light. However, light having a wavelength in the infrared region is not polarized.
- the front-side polarizing plate 40c uses a material that linearly polarizes infrared light, and the back-side polarizing plate 40d. Use an infrared light that does not polarize. Visible light becomes linearly polarized light by both polarizing plates 40c and 40d.
- the infrared light irradiated from the infrared LED can escape from the device surface 300a, and the infrared light reflected by the device surface 300a or the like can be polarized on the front side. It can be blocked by the plate 40c.
- both the front side polarizing plate 40c and the back side polarizing plate 40d each having the above-described properties are commercially available, they can be appropriately obtained according to the purpose.
- the surface reflected by the device surface 300a, the interface between the protective plate 90 and the air layer 80, and the interface between the air layer 80 and the TAC film 60 is front side. It can be blocked by the polarizing plate 40c. Since most of the reflected light from an input object such as a finger touching the apparatus surface 300a is a scattered light component, the ratio of light that is blocked by the front-side polarizing plate 40c is small, and the light sensor element 31 detects the reflected light. be able to.
- FIG. 11 shows a schematic configuration of a liquid crystal display device 400 which is a modification of the liquid crystal display device 300 shown in FIG.
- the liquid crystal display device 400 is not provided with the air layer 80 and the protection plate 90. Further, the TAC film 60 shown in FIG. 11 may not be provided.
- Other configurations are the same as those of the liquid crystal display device 300.
- the broadband ⁇ / 4 retardation plate 50 is provided, since the broadband ⁇ / 4 retardation plate 50 is provided, light based on the display image reflected on the surface of the device cannot pass through the front-side polarizing plate 40a. It is possible to prevent the sensitivity from being lowered due to the influence of the reflected light from the input object.
- the liquid crystal display device 300 has a higher effect of the present invention. This is because in the liquid crystal display device 400, the interface on which the display image can be reflected in the device is only the device surface, whereas in the liquid crystal display device 300, there are three interfaces on which the display image can be reflected ( Specifically, the interface between the TAC film 60 and the air layer 80, the interface between the air layer 80 and the protection plate 90, and the interface between the protection plate 90 and the air layer (that is, three interfaces: the device surface 300a)) Because.
- the reflected light removal effect by providing the broadband ⁇ / 4 retardation plate 50 is higher in the liquid crystal display device 300 than in the liquid crystal display device 400.
- FIG. 3 A third embodiment of the present invention will be described below.
- a self-luminous display device integrated with a touch panel having an area sensor function (specifically, a touch panel function) will be described.
- FIG. 12 shows a configuration of a touch panel integrated self-luminous display device 500 of the present embodiment.
- a touch panel integrated self-luminous display device 500 (also simply referred to as a self-luminous display device 500) shown in FIG. 12 has an image of the device surface 500a (detection target surface) formed by a plurality of two-dimensionally arranged photosensor elements. It has a touch panel function that detects the input position by detecting it.
- members having the same configuration and function as those of the liquid crystal display device 100 of Embodiment 1 are denoted by the same reference numerals, and description thereof is omitted.
- the self-luminous display device 500 of the present embodiment includes a self-luminous panel 20b.
- the self-luminous panel 20b is a self-luminous display panel such as a plasma display panel (PDP) or an organic EL panel.
- the self-luminous panel 20b incorporates an optical sensor element for realizing a touch panel function in addition to each pixel configuration for displaying an image.
- an optical sensor element for realizing a touch panel function in addition to each pixel configuration for displaying an image.
- a configuration disclosed in Patent Document 4 can be applied to a configuration in which the light sensor element is incorporated in such a self-luminous display panel.
- a front-side polarizing plate 40a (a polarizing plate provided on the image display surface side) is provided on the self-luminous panel 20b.
- a broadband ⁇ / 4 retardation plate 50 is disposed on the front-side polarizing plate 40a.
- the broadband ⁇ / 4 retardation plate 50 has a configuration in which a ⁇ / 2 retardation plate 50b and a ⁇ / 4 retardation plate 50a are stacked in this order from the front polarizing plate 40a side.
- a TAC film 60 is disposed on the broadband ⁇ / 4 retardation plate 50.
- a protective plate 90 is disposed on the outermost surface 500a of the self-luminous display device 500 (that is, the detection target surface 500a). And the TAC film 60 and the protective plate 90 are arrange
- the front side polarizing plate 40a As the front side polarizing plate 40a, the TAC film 60, the air layer 80, and the protective plate 90, the same ones as those provided in the liquid crystal display device 100 can be used.
- the self-luminous display device 500 Since the self-luminous display device 500 has the above-described configuration, it is formed in the self-luminous panel 20b when an object such as a finger or an input pen touches the detection target surface 500a.
- the optical sensor element can detect the input position by capturing the finger or the input pen as an image.
- the self-luminous display device 500 includes the broadband ⁇ / 4 retardation plate 50, most of the light reflected from each interface and finger in the device passes through the front-side polarizing plate 40a. I can't. Therefore, it is possible to prevent the optical sensor element from detecting reflected light from the display image. Thereby, the display apparatus which can detect an input position with high precision can be obtained.
- FIG. 13 shows a schematic configuration of a self-luminous display device 600 which is a modification of the self-luminous display device 500 shown in FIG.
- the self-luminous display device 600 is not provided with the air layer 80 and the protection plate 90. Further, the TAC film 60 shown in FIG. 13 may not be provided.
- Other configurations are the same as the self-luminous display device 500.
- the broadband ⁇ / 4 retardation plate 50 is provided, since the broadband ⁇ / 4 retardation plate 50 is provided, light based on the display image reflected on the surface of the device cannot pass through the front polarizing plate 40a. Can be prevented from being affected by the reflected light from the input object.
- the self-luminous display device 500 has a higher effect of the present invention.
- the interface on which the display image can be reflected in the device is only the device surface
- the interface on which the display image can be reflected is three. (Specifically, the interface between the TAC film 60 and the air layer 80, the interface between the air layer 80 and the protective plate 90, and the interface between the protective plate 90 and the air layer (that is, the apparatus surface 300a). 3 interfaces).
- the reflected light removal effect by providing the broadband ⁇ / 4 retardation plate 50 is higher in the self-luminous display device 500 than in the self-luminous display device 600.
- a display device includes a display panel including a plurality of photosensor elements, and the photosensor elements detect images on the surface of the apparatus, thereby allowing input from the outside.
- a display device having an area sensor function for detecting a position, wherein a polarizing plate is provided on an image display surface side of the display panel, and ⁇ / A four-phase difference plate is provided.
- the image display surface side of the polarizing plate means the surface side of the polarizing plate opposite to the surface facing the display panel.
- the ⁇ / 4 retardation plate is provided on the polarizing plate, light resulting from the display image of the display panel is reflected on the surface of the device or the like based on the following principle. Light can be blocked.
- (1) When the light from the display panel passes through the polarizing plate, it becomes linearly polarized light (for example, linearly polarized light in the horizontal direction).
- (2) When the linearly polarized light of (1) passes through the ⁇ / 4 retardation plate, it becomes clockwise circularly polarized light.
- the circularly polarized light of (2) is reflected by, for example, the surface of the display device or a finger, it becomes counterclockwise circularly polarized light.
- the combination of the polarizing plate and the ⁇ / 4 retardation plate prevents light reflected from the image display without passing through the surface of the display device from entering the display panel. Can do. Therefore, the output value obtained in the optical sensor element can be prevented from changing due to the influence of the reflected light from the display image, and the input position can be detected with higher accuracy.
- the specular reflection component of the reflected light from an object that inputs on the surface of the device such as a finger or an input pen can be blocked. It can prevent that detection sensitivity falls under the influence of the reflected light from an input target object.
- a ⁇ / 2 retardation plate is further provided between the polarizing plate and the ⁇ / 4 retardation plate, and the optical axis of the ⁇ / 2 retardation plate and the above-mentioned It is preferable that the optical axes of the ⁇ / 4 phase difference plates are arranged so as to cross each other.
- the laminated plate of the ⁇ / 2 phase difference plate and the ⁇ / 4 phase difference plate can convert light having a wide wavelength range into circularly polarized light as described above. Call it.
- the ⁇ / 2 phase difference plate and the ⁇ / 4 phase difference plate are arranged so that the intersection angle p of the optical axes satisfies 50 ° ⁇ p ⁇ 70 °. Preferably it is.
- the light incident on the ⁇ / 2 retardation plate and the ⁇ / 4 retardation plate after passing through the polarizing plate is not only light having a wavelength of 550 nm but also light having a broader wavelength. Can be made into circularly polarized light.
- two axes orthogonal to each other are an X axis and a Y axis
- the ⁇ / 4 phase difference plate, the ⁇ / 2 phase difference plate, and the polarizing plate include the X axis and the Y axis.
- the optical axis of the ⁇ / 4 retardation plate is 20 degrees.
- the ⁇ / 4 retardation plate is present so that the optical axis of the ⁇ / 2 retardation plate is in the direction of 75 degrees and the transmission axis of the polarizing plate is in the direction of 90 degrees.
- the ⁇ / 2 phase difference plate and the polarizing plate are preferably disposed.
- the light incident on the ⁇ / 2 phase difference plate and the ⁇ / 4 phase difference plate not only has a wavelength of 550 nm but also a broader wavelength (specifically Specifically, light in the range of 400 nm to 700 nm (visible light range) can be made circularly polarized light.
- the ⁇ / 2 phase difference plate and the ⁇ / 4 phase difference plate are formed of the same material, and at least one of the phase difference plates has a phase difference.
- Nx, ny, and nz are nx> ny and (nx ⁇ nz) where nx, xy are the refractive indexes in the orthogonal axis in the plate plane, and nz is the refractive index in the thickness direction of the retardation plate. ) ⁇ (Nx ⁇ ny).
- the light incident on the ⁇ / 2 retardation plate and the ⁇ / 4 retardation plate after passing through the polarizing plate is not only light having a wavelength of 550 nm but also light having a broader wavelength. Can be made into circularly polarized light.
- the display device of the present invention it is sufficient that at least one of the ⁇ / 2 phase difference plate and the ⁇ / 4 phase difference plate satisfies the above conditions. More preferably, the above conditions are satisfied.
- a TAC film is further provided on the ⁇ / 4 retardation plate.
- TAC of TAC film means triacetyl cellulose.
- ⁇ d is generally 50 nm to 60 nm.
- nx, ny, and nz are three main refractive indexes in the x, y, and z axis directions orthogonal to each other.
- the protective effect of the retardation plate can be obtained by providing this TAC film.
- a protective plate is further provided on the side of the TAC film opposite to the surface facing the ⁇ / 4 retardation plate.
- this protective plate By providing this protective plate, it is possible to prevent scratches, dirt, and damage to the panel including the retardation plate provided on the inside thereof. Since the protective plate is provided, there are a plurality of layers between the display panel and the outermost surface of the device. Therefore, the display image is reflected at the interface of each layer, and the detection accuracy of the optical sensor element Is expected to decrease. However, in the present invention, since the polarizing plate and each phase difference plate are provided, it is possible to reduce the reflected light at each interface, and thus it is possible to suppress a decrease in accuracy of the optical sensor element.
- an air layer is provided between the TAC film and the protective plate.
- the display panel may be a liquid crystal panel.
- the display device may further include a backlight that emits light to the liquid crystal panel, and the backlight may include a light source that emits visible light.
- the display device may further include a backlight that emits light to the liquid crystal panel, and the backlight may include a light source that emits visible light and a light source that emits infrared light.
- an infrared light transmitting portion that selectively transmits infrared light may be provided on the photosensor element.
- a back-side polarizing plate is further provided between the liquid crystal panel and the backlight, and the polarizing plate disposed on the image display surface side of the liquid crystal panel transmits infrared light.
- Linearly polarized light may be used, and the back side polarizing plate may linearly polarize visible light and not linearly polarize infrared light.
- the infrared light emitted from the light source that emits infrared light can pass through the surface of the apparatus, and the infrared light reflected on the surface of the apparatus is arranged on the image display surface side. Can be blocked by a polarizing plate (front side polarizing plate).
- the display panel may be a self-luminous display panel.
- the display device of the present invention can be used, reflection of light caused by a display image including light of various wavelengths can be suppressed, and the input position can be detected with high accuracy.
- the display device of the present invention can be applied to a display device having a touch panel function.
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Abstract
Description
(1)表示パネルからの光が偏光板を通過すると直線偏光(例えば、水平方向の直線偏光)になる。
(2)上記(1)の直線偏光がλ/4位相差板を通過すると右回りの円偏光になる。
(3)上記(2)の円偏光が、例えば、表示装置の表面あるいは指などで反射されると左回りの円偏光になる。
(4)上記(3)の反射した左回りの円偏光は、λ/4位相差板を通過すると直線偏光(例えば、垂直方向の直線偏光)となる。
(5)上記(4)の直線偏光は、偏光板の透過軸とは異なる方向の偏光であるため、偏光板を通過することができない。
本発明の一実施形態について図1~図8に基づいて説明すると以下の通りである。なお、本発明はこれに限定されるものではない。
(1)表示パネルからの光が偏光板を通過するとX軸方向の直線偏光になる。
(2)上記(1)の直線偏光がλ/4位相差板を通過すると右回りの円偏光になる。
(3)上記(2)の円偏光が、例えば、液晶表示装置の表面あるいは指などで反射されると左回りの円偏光になる。
(4)上記(3)の反射した左回りの円偏光は、λ/4位相差板を通過するとY軸方向の直線偏光となる。
(5)上記(4)の直線偏光は、偏光板の透過軸(X軸方向)とは直交する方向の偏光であるため、偏光板を通過することができない。
本発明の第2の実施形態について以下に説明する。本実施形態では、バックライトに赤外光光源を有しており、光センサ素子が赤外光を検知することで入力位置の検出を行うタッチパネル一体型の液晶表示装置について説明する。
本発明の第3の実施形態について以下に説明する。本実施形態では、エリアセンサ機能(具体的には、タッチパネル機能)を備えているタッチパネル一体型の自発光型表示装置について説明する。
(1)表示パネルからの光が偏光板を通過すると直線偏光(例えば、水平方向の直線偏光)になる。
(2)上記(1)の直線偏光がλ/4位相差板を通過すると右回りの円偏光になる。
(3)上記(2)の円偏光が、例えば、表示装置の表面あるいは指などで反射されると左回りの円偏光になる。
(4)上記(3)の反射した左回りの円偏光は、λ/4位相差板を通過すると直線偏光(例えば、垂直方向の直線偏光)となる。
(5)上記(4)の直線偏光は、偏光板の透過軸とは異なる方向の偏光であるため、偏光板を通過することができない。
11 バックライト
20 液晶パネル(表示パネル)
20a 赤外光センサ付き液晶パネル(表示パネル)
20b 自発光型パネル(表示パネル)
21 アクティブマトリクス基板
22 対向基板
23 液晶層
24 カラーフィルタ層
30 光センサ素子
31 光センサ素子
32 赤外光透過フィルタ(赤外光透過部)
40a 表側偏光板(偏光板)
40c 表側偏光板(偏光板)
50 広帯域λ/4位相差板
50a λ/4位相差板
50b λ/2位相差板
60 TACフィルム
80 空気層
90 保護板
100 液晶表示装置(表示装置)
200 液晶表示装置(表示装置)
300 液晶表示装置(表示装置)
400 液晶表示装置(表示装置)
500 自発光型表示装置(表示装置)
600 自発光型表示装置
Claims (14)
- 複数の光センサ素子を備えた表示パネルを備え、該光センサ素子が装置表面上の画像を検知することで、外部からの入力位置を検出するエリアセンサ機能を有している表示装置であって、
上記表示パネルの画像表示面側には、偏光板が設けられており、
上記偏光板の画像表示面側には、λ/4位相差板が設けられていることを特徴とする表示装置。 - 上記偏光板と上記λ/4位相差板との間には、λ/2位相差板がさらに設けられており、
上記λ/2位相差板の光軸と上記λ/4位相差板の光軸とは、互いに交差した位置関係を有して配置されていることを特徴とする請求項1に記載の表示装置。 - 上記λ/2位相差板と上記λ/4位相差板とは、
それぞれの光軸の交差角度pが、50度<p<70度を満たすように、
配置されていることを特徴とする請求項2に記載の表示装置。 - 互いに直交する2つの軸をX軸およびY軸とし、上記λ/4位相差板、上記λ/2位相差板、および上記偏光板を、上記X軸およびY軸を含むXY平面に沿ってそれぞれ配置したとき、
上記Y軸の正の方向を0度とし、上記X軸の正の方向を90度とすると、
上記λ/4位相差板の光軸は、20度の方向に存在し、
上記λ/2位相差板の光軸は、75度の方向に存在し、
上記偏光板の透過軸は、90度の方向に存在するように、
上記λ/4位相差板、上記λ/2位相差板、および上記偏光板がそれぞれ配置されていることを特徴とする請求項3に記載の表示装置。 - 上記λ/2位相差板と上記λ/4位相差板とは、同一の材料で形成されており、かつ、
上記の各位相差板のうちの少なくとも一方において、位相差板平面内の直交軸における各屈折率をnx、xyとし、位相差板の厚さ方向における屈折率をnzとすると、
上記nx、ny、およびnzは、
nx>ny、かつ、(nx-nz)<(nx-ny)の関係を満たしていることを特徴とする請求項2~4の何れか1項に記載の表示装置。 - 上記λ/4位相差板上には、TACフィルムがさらに設けられていることを特徴とする請求項1~5の何れか1項に記載の表示装置。
- 上記TACフィルムにおける上記λ/4位相差板との対向面側とは反対側には、保護板がさらに設けられていることを特徴とする請求項6に記載の表示装置。
- 上記TACフィルムと上記保護板との間には、空気層が設けられていることを特徴とする請求項7に記載の表示装置。
- 上記表示パネルは、液晶パネルであることを特徴とする請求項1~8の何れか1項に記載の表示装置。
- 上記液晶パネルに対して光を照射するバックライトをさらに備え、
上記バックライトは、可視光を発する光源を有していることを特徴とする請求項9に記載の表示装置。 - 上記液晶パネルに対して光を照射するバックライトをさらに備え、
上記バックライトは、可視光を発する光源および赤外光を発する光源を有していることを特徴とする請求項9に記載の表示装置。 - 上記光センサ素子上には、赤外光を選択的に透過する赤外光透過部が設けられていることを特徴とする請求項11に記載の表示装置。
- 上記液晶パネルと上記バックライトとの間には、裏側偏光板がさらに設けられており、
上記液晶パネルの画像表示面側に配置された上記偏光板は、赤外光を直線偏光するものであり、
上記裏側偏光板は、可視光を直線偏光し、かつ、赤外光を直線偏光しないものであることを特徴とする請求項11または12に記載の表示装置。 - 上記表示パネルは、自発光型の表示パネルであることを特徴とする請求項1~8の何れか1項に記載の表示装置。
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JP2011513210A JP5335901B2 (ja) | 2009-05-15 | 2010-01-22 | 表示装置 |
RU2011128784/02A RU2011128784A (ru) | 2009-05-15 | 2010-01-22 | Дисплейное устройство |
EP10774649.7A EP2383718A4 (en) | 2009-05-15 | 2010-01-22 | DISPLAY DEVICE |
CN2010800040329A CN102272814B (zh) | 2009-05-15 | 2010-01-22 | 显示装置 |
US13/143,269 US20110267561A1 (en) | 2009-05-15 | 2010-01-22 | Display device |
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WO2014069378A1 (ja) * | 2012-10-29 | 2014-05-08 | 大日本印刷株式会社 | インセルタッチパネル液晶素子の前面用の光学積層体及びこれを用いたインセルタッチパネル型液晶表示装置 |
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KR20190083338A (ko) | 2016-11-30 | 2019-07-11 | 니폰 제온 가부시키가이샤 | 광학 적층체, 원 편광판, 터치 패널 및 화상 표시 장치 |
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CN110928028A (zh) * | 2019-11-29 | 2020-03-27 | 武汉华星光电技术有限公司 | 显示面板 |
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JP2020187847A (ja) * | 2019-05-10 | 2020-11-19 | ローム株式会社 | 受光センサ、近接センサ、および電子機器 |
JP7209584B2 (ja) | 2019-05-10 | 2023-01-20 | ローム株式会社 | 受光センサ、近接センサ、および電子機器 |
Also Published As
Publication number | Publication date |
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JPWO2010131387A1 (ja) | 2012-11-01 |
CN102272814B (zh) | 2013-10-16 |
BRPI1006946A2 (pt) | 2019-09-24 |
CN102272814A (zh) | 2011-12-07 |
EP2383718A4 (en) | 2013-07-24 |
RU2011128784A (ru) | 2013-06-20 |
JP5335901B2 (ja) | 2013-11-06 |
EP2383718A1 (en) | 2011-11-02 |
US20110267561A1 (en) | 2011-11-03 |
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