WO2015146462A1 - タッチパネル付き表示装置 - Google Patents
タッチパネル付き表示装置 Download PDFInfo
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- WO2015146462A1 WO2015146462A1 PCT/JP2015/055667 JP2015055667W WO2015146462A1 WO 2015146462 A1 WO2015146462 A1 WO 2015146462A1 JP 2015055667 W JP2015055667 W JP 2015055667W WO 2015146462 A1 WO2015146462 A1 WO 2015146462A1
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- color filter
- interval
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- display device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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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
-
- 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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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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
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
-
- 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
- G02F1/1343—Electrodes
- G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
Definitions
- the present invention relates to a display device with a touch panel.
- a configuration of a display device with a touch panel in which a touch panel is arranged on the display device is known.
- the display quality of the display device is deteriorated, for example, when the sensor of the touch panel is visually recognized by the user.
- Japanese Patent Application Laid-Open No. 2010-257492 includes a translucent substrate and a plurality of translucent thin films formed on one surface of the translucent substrate and having different refractive indexes.
- a multi-layer film in which one translucent thin film is a niobium oxide film, a plurality of first translucent electrodes extending in a first direction, and a second direction intersecting the first direction A capacitance-type input device including a plurality of second light-transmitting electrodes is disclosed.
- Japanese Patent Application Laid-Open No. 2013-58180 discloses a transparent substrate, a first metal electrode formed on one side of the transparent substrate, in which first unit electrode lines are repeatedly arranged in parallel, and formed on the other surface of the transparent substrate.
- a touch panel including a second metal electrode configured by repeatedly arranging second unit electrode lines orthogonal to the first unit electrode lines in parallel is described. This document describes that moire can be reduced by combining a first metal electrode or a second metal electrode having a specific shape and arranging them on both surfaces of a transparent substrate.
- moire may occur due to interference between the sensor and the display device. Even if the visibility of the sensor of the touch panel is lowered, the deterioration of display quality due to moire may not be improved.
- An object of the present invention is to obtain a configuration of a display device with a touch panel that can suppress the occurrence of moire.
- the display device with a touch panel disclosed herein includes a color filter layer including a plurality of pixels arranged in a matrix along a first direction and a second direction orthogonal to each other, and a predetermined sensor interval SY along the second direction. And a sensor pattern layer arranged to overlap the color filter layer when viewed from the direction perpendicular to the first direction and the second direction.
- Each of the plurality of pixels includes n color filters that transmit light in different wavelength ranges, where n is an integer of 3 or more.
- the n color filters are arranged at a predetermined subpixel interval CSFY along the second direction.
- the sensor interval SY and the sub-pixel interval CSFY satisfy the following formula (1), where m is a positive integer.
- the configuration of a display device with a touch panel that can suppress the occurrence of moire can be obtained.
- FIG. 1 is a cross-sectional view schematically showing a configuration of a display device with a touch panel according to the first embodiment of the present invention.
- FIG. 2 is a plan view showing the configuration of the color filter layer.
- FIG. 3 is a plan view showing the configuration of the sensor pattern layer.
- FIG. 4 is a schematic cross-sectional view for explaining the effect of the display device with a touch panel.
- FIG. 5 is a diagram illustrating an example when the setting of the sensor interval SY is inappropriate.
- FIG. 6A is a plan view showing the color filter layer and the sensor pattern layer in an overlapped manner, and is a view when the sensor interval SY is three times the sub-pixel interval CFSY.
- FIG. 6B is a plan view showing the color filter layer and the sensor pattern layer superimposed on each other, and is a view when the sensor interval SY is set to four times the sub-pixel interval CFSY.
- FIG. 6C is a plan view showing the color filter layer and the sensor pattern layer in an overlapping manner, and is a view when the sensor interval SY is set to five times the sub-pixel interval CFSY.
- FIG. 6D is a plan view showing the color filter layer and the sensor pattern layer in an overlapping manner, and is a diagram when the sensor interval SY is set to 6 times the sub-pixel interval CFSY.
- FIG. 8 is a table summarizing the relationship between the pixel interval CFX and the sensor interval SY and the presence / absence of moire.
- FIG. 9 is a table summarizing the relationship between the pixel interval CFX and the bias angle ⁇ and the presence / absence of moire.
- FIG. 10 is a plan view showing the configuration of the sensor pattern layer of the display device with a touch panel according to the second embodiment.
- FIG. 11A is a plan view showing the color filter layer and the sensor pattern layer superimposed on each other, and the period is set so that the electrode is folded when the end of the electrode is moved in the y direction by a distance twice as large as the sub-pixel spacing CFSY. It is a figure at the time of setting SPN.
- FIG. 11B is a plan view showing the color filter layer and the sensor pattern layer superimposed on each other, and the period is set so that the electrode is folded when the end of the electrode is moved in the y direction by a distance three times the sub-pixel spacing CFSY. It is a figure at the time of setting SPN.
- FIG. 11A is a plan view showing the color filter layer and the sensor pattern layer superimposed on each other, and the period is set so that the electrode is folded when the end of the electrode is moved in the y direction by a distance three times the sub-pixel spacing CFSY. It is a figure at the time of setting SPN.
- FIG. 11C is a plan view showing the color filter layer and the sensor pattern layer superimposed on each other, and the period is set so that the electrode is folded when the end of the electrode is moved in the y direction by a distance four times the sub-pixel spacing CFSY. It is a figure at the time of setting SPN.
- FIG. 11D is a plan view showing the color filter layer and the sensor pattern layer in an overlapping manner, and the period is set so that the electrode is folded when the end of the electrode is moved in the y direction by a distance 5 times the sub-pixel interval CFSY. It is a figure at the time of setting SPN.
- a display device with a touch panel includes a color filter layer including a plurality of pixels arranged in a matrix along a first direction and a second direction orthogonal to each other, and a predetermined along the second direction.
- the sensor pattern layer includes a plurality of electrodes arranged at the sensor interval SY, and is arranged so as to overlap the color filter layer when viewed from the direction perpendicular to the first direction and the second direction.
- Each of the plurality of pixels includes n color filters that transmit light in different wavelength ranges, where n is an integer of 3 or more.
- the n color filters are arranged at a predetermined subpixel interval CSFY along the second direction.
- the sensor interval SY and the sub-pixel interval CSFY satisfy the following formula (1), where m is a positive integer (first configuration).
- each pixel of the color filter layer includes n color filters arranged at a predetermined sub-pixel interval CSFY along the second direction.
- the n color filters transmit light in different wavelength ranges.
- the display device with a touch panel transmits light through these n color filters and displays an arbitrary color by additive color mixing.
- the sensor pattern layer includes a plurality of electrodes arranged at a predetermined sensor interval SY along the second direction.
- the light transmittance is different between the portion where the electrode is formed and the portion where the electrode is not formed. Therefore, the light and darkness resulting from the pattern of the sensor pattern layer may be visually recognized by the observer. In particular, if the area where the electrode is not formed and the color filter of each color overlaps, the transmitted light may appear colored. Such color deviation causes moire.
- color deviation is suppressed by making the sensor interval SY and the sub-pixel interval CSFY appropriate. Specifically, by satisfying the expression (1), it is possible to reduce color deviation and suppress the occurrence of moire.
- the number n of color filters is 3, and the following expression (2) is satisfied (second configuration).
- the plurality of pixels are arranged at a predetermined pixel interval CFX along the first direction, and each of the plurality of transparent electrodes is formed so as to form a bias angle ⁇ with the first direction.
- the pixel interval CSFY, the pixel interval CFX, and the bias angle preferably satisfy the following expression (3) (third configuration). atan (2/3 ⁇ CFSY / CFX) ⁇ ⁇ ⁇ atan (2 ⁇ CFSY / CFX) (3)
- each of the plurality of electrodes is folded back so that the angle formed with the first direction is reversed every half of the predetermined period SPN along the first direction, and the sub-pixel interval CSFY, bias
- the angle ⁇ and the period SPN preferably satisfy the following expression (4) (fourth configuration).
- the electrode by folding the electrode every half of the predetermined period SPN, the electrode can be made to be a straight line approximately parallel to the first direction in the long section. The degree is improved.
- the period SPN satisfies Expression (4), local color deviation can be eliminated.
- the sub-pixel interval CSFY, the bias angle ⁇ , and the period SPN satisfy the following formula (5) (fifth configuration).
- SPN (6 ⁇ CFSY) / TAN ( ⁇ ) (5)
- the amplitude of the electrode in the second direction can be minimized as long as the color balance is not lost. Therefore, the degree of freedom in the layout of the sensor pattern layer can be improved.
- FIG. 1 is a cross-sectional view schematically showing a configuration of a display device 1 with a touch panel according to the first embodiment of the present invention.
- the display device with a touch panel 1 includes an active matrix substrate 11 and a color filter substrate 12 which are arranged to face each other, a liquid crystal layer 13 sealed between these substrates, and polarizing plates 14 and 15.
- the x direction (first direction), the y direction (second direction), and the z direction are defined as shown in FIG.
- the x direction, the y direction, and the z direction are orthogonal to each other.
- a direction parallel to the thickness direction of the display device 1 with a touch panel is defined as a z direction.
- the active matrix substrate 11 has a plurality of pixel electrodes.
- the display device with a touch panel 1 forms an electric field in the liquid crystal layer 13 by controlling the potential of each pixel electrode, and changes the polarization state of light passing through the liquid crystal layer 13.
- the display device with a touch panel 1 transmits specific polarized light by the polarizing plate 14, changes the polarization state of light by the liquid crystal layer 13, and transmits specific polarized light by the polarizing plate 15.
- the display device 1 with a touch panel can display an arbitrary image with this configuration.
- any known driving method can be used as the driving method of the liquid crystal layer 13.
- the color filter substrate 12 has a color filter layer 121 formed on one surface and a sensor pattern layer 122 formed on the other surface.
- the color filter layer 121 and the sensor pattern layer 122 are disposed so as to overlap each other when viewed from the z-axis direction with the color filter substrate 12 interposed therebetween.
- the color filter layer 121 is disposed between the color filter substrate 12 and the liquid crystal layer 13, and the sensor pattern layer 122 is disposed between the color filter substrate 12 and the polarizing plate 15.
- the color filter layer 121 includes a plurality of pixels PX.
- Each of the pixels PX includes a red color filter 121R, a green color filter 121G, a blue color filter 121B, and a black matrix BM disposed therebetween.
- the color filters 121R, 121G, and 121B are arranged at the sub-pixel interval CFSY along the y direction.
- the sensor pattern layer 122 includes a plurality of electrodes 1220 formed at a predetermined interval.
- Each of the electrodes 1220 is formed of a transparent conductive film such as ITO (Indium Tin Oxide).
- the electrodes 1220 are arranged at a sensor interval SY along the y direction.
- the display device with a touch panel 1 can calculate the coordinates of a finger or the like approaching the display device with a touch panel 1 by measuring the capacitance of each electrode 1220.
- An index matching layer may be formed between the color filter substrate 12 and the sensor pattern layer 122, between the sensor pattern layer 122 and the polarizing plate 15, or both.
- the index matching layer adjusts the refractive index to improve the transmittance of the electrode 1220 and improve the optical characteristics of the sensor pattern layer 122.
- FIG. 2 is a plan view showing the configuration of the color filter layer 121.
- the color filters 121R, 121G, and 121B are hatched. This is a schematic representation of the colors of the color filters 121R, 121G, and 121B by hatching, and does not indicate a cross-sectional structure. The same applies to FIGS. 6A to 6D, FIGS. 7A to 7D, and FIGS. 11A to 11D described later.
- the color filter layer 121 includes a plurality of pixels PX.
- Each of the pixels PX includes color filters 121R, 121G, and 121B.
- the color filters 121R, 121G, and 121B are arranged at the sub-pixel interval CFSY along the y direction.
- the plurality of pixels PX are arranged in a matrix along the x direction and the y direction.
- the pixels PX are arranged at a pixel interval CFX along the x direction, and are arranged at an interval (3 ⁇ CFSY) three times the sub pixel interval CFSY along the y direction.
- FIG. 3 is a plan view showing the configuration of the sensor pattern layer 122.
- the sensor pattern layer 122 includes a plurality of electrodes 1220 arranged at the sensor interval SY along the y direction. Each of the electrodes 1220 is formed so as to form a bias angle ⁇ with the x direction.
- the length SL of the gap between the electrodes 1220 is preferably as short as possible from the viewpoint of the characteristics of the sensor pattern layer 122. However, if the length SL of the gap is too short, the electrodes 1220 are easily short-circuited, and the yield of the display device 1 with a touch panel is reduced. For this reason, the length SL of the gap is usually set to be approximately the same as the sub-pixel interval CFSY.
- the sensor interval SY, the pixel interval CFX, the sub-pixel interval CFSY, and the bias angle ⁇ satisfy the following expressions (2) and (3).
- FIG. 4 is a schematic cross-sectional view for explaining the effects of the display device 1 with a touch panel.
- the display device with a touch panel 1 is irradiated with light from a light source (not shown) toward the polarizing plate 14.
- the light irradiated on the display device with a touch panel 1 is schematically shown by white arrows.
- light that has passed through the color filter layer 121 is schematically shown by an arrow with the same hatching as the color filter that has passed through.
- the brightness of light that has passed through the color filter layer 121 is schematically shown by the length of the arrow.
- the sensor pattern layer 122 has different light transmittances between a portion where the electrode 1220 is formed and a portion where the electrode 1220 is not formed. Specifically, light that has passed through the electrode 1220 becomes darker than light that has passed through a portion where the electrode 1220 is not formed. Therefore, when the balance of the area where the portion where the electrode 1220 is not formed and the color filter of each color overlaps is lost, transmitted light may appear to be colored in a specific color.
- FIG. 5 is a diagram illustrating an example when the setting of the sensor interval SY is inappropriate.
- the portion where the electrode 1220 is not formed and the color filter 121 ⁇ / b> R exist at substantially the same period in the y direction. Therefore, the area where the portion where the electrode 1220 is not formed overlaps with the color filter 121R is larger than the area where the color filter 121R overlaps. In this manner, when a portion where the electrode 1220 is not formed and a specific color filter overlap in a narrow region, the color of the specific color filter appears to be colored. When regions that appear to be colored in red, green, and blue are periodically generated, they are observed as moire.
- [Setting of sensor interval SY] 6A to 6D are plan views showing the color filter layer 121 and four types of sensor pattern layers 122 having different sensor intervals SY in an overlapping manner.
- FIG. 6A is a diagram when the sensor interval SY is three times the sub-pixel interval CFSY.
- the region R1 the area where the portion where the electrode 1220 is not formed and the color filter 121B overlap is larger than the area where the color filter of other colors overlaps. Therefore, the region R1 appears to be colored blue. Similarly, region R2 appears colored green and region R3 appears colored red.
- FIG. 6B is a diagram when the sensor interval SY is four times the sub-pixel interval CFSY.
- the area where the electrode 1220 is not formed and the color filter of each color overlap is equal.
- FIG. 6C is a diagram when the sensor interval SY is five times the sub-pixel interval CFSY. Also in this example, in each of the regions R9 to R13, the area where the portion where the electrode 1220 is not formed overlaps with the color filter of each color is equal.
- FIG. 6D is a diagram when the sensor interval SY is six times the sub-pixel interval CFSY.
- the region R14 the area where the portion where the electrode 1220 is not formed overlaps with the color filter 121B is larger than the area where the color filter 121B overlaps. Therefore, the region R14 appears colored blue. Similarly, the region R15 appears colored green, and the region R16 appears colored red.
- [Setting of bias angle ⁇ ] 7A to 7D are plan views showing the color filter layer 121 and four types of sensor pattern layers 122 having different bias angles ⁇ in an overlapping manner.
- the bias angle ⁇ is set so that the end of the electrode 1220 moves by a distance of 1/3 times the sub-pixel spacing CFSY in the y direction when the same distance as the pixel spacing CFX moves in the x direction. It is.
- the area where the portion where the electrode 1220 is not formed overlaps with the color filter 121G is larger than the area where the color filter overlaps with other color filters.
- the length of the region R17 in the x direction is three times the pixel interval CFX.
- the bias angle ⁇ is set so that the end of the electrode 1220 moves in the y direction by a distance that is 2/3 times the sub-pixel interval CFSY when moved in the x direction by the same distance as the pixel interval CFX. It is.
- the area where the portion where the electrode 1220 is not formed overlaps with the color filter 121G is larger than the area where the color filter overlaps with other color filters.
- the length of the region R18 in the x direction is twice the pixel interval CFX.
- the bias angle ⁇ is set so that the end of the electrode 1220 moves in the y direction by a distance that is 5/3 times the sub-pixel spacing CFSY when moved in the x direction by the same distance as the pixel interval CFX. It is.
- the area where the portion where the electrode 1220 is not formed overlaps with the color filter 121R is larger than the area where the color filter overlaps with other color filters.
- the length of the region R19 in the x direction is one time the pixel interval CFX.
- the bias angle ⁇ is 45 degrees.
- the area where the color filter of a specific color is hidden by the electrode 1220 increases. That is, as the angle of the electrode 1220 increases, the pitch (same color) of the gap that does not interfere with the electrode 1220 in the x direction decreases. When viewed in the y direction, the color other than the color that escapes from the non-interfering gap is an area that interferes with ITO, resulting in a bias in color.
- the bias angle ⁇ preferably satisfies the following formula (3). As long as the following expression (3) is satisfied, moire is not recognized and the color balance is not lost.
- FIG. 8 is a table summarizing the relationship between the pixel interval CFX and the sensor interval SY and the presence or absence of moire.
- the value of CFX is described. The bias angle was 30 degrees. “ ⁇ ” indicates that moire did not occur. “ ⁇ ” indicates that the moire was a level that could be confirmed using a microscope. “X” indicates that the moire was at a level that can be visually confirmed.
- FIG. 9 is a table summarizing the relationship between the pixel interval CFX and the bias angle ⁇ and the presence or absence of moiré.
- the value of the bias angle ⁇ is described.
- the columns “CFX” and “CFSY” indicate that the bias angle is set so that when the distance proceeds in the x direction by the distance described in the CFX column, the distance proceeds in the y direction by the distance described in the CFSY field. .
- CFX is “3 pixels” and “CFSY” is “4 pixels”
- the display device with a touch panel 1 has been described above.
- the sensor interval SY, the pixel interval CFX, the sub-pixel interval CFSY, and the bias angle ⁇ satisfy Expressions (2) and (3). As a result, the occurrence of moire is suppressed.
- the display device with a touch panel according to the second embodiment of the present invention includes a sensor pattern layer 222 instead of the sensor pattern layer 122 of the display device with a touch panel 1.
- FIG. 10 is a plan view showing the configuration of the sensor pattern layer 222. Similar to the sensor pattern layer 122, the sensor pattern layer 222 includes a plurality of electrodes 2220 arranged at sensor intervals SY along the y direction. Each of the electrodes 2220 is formed so as to form a bias angle ⁇ with the x direction.
- Each of the electrodes 2220 is folded back so that the angle formed with the x direction is reversed every half of the predetermined period SPN along the x direction.
- the electrode 2220 can be linearly approximately parallel to the x direction in the long section, the degree of freedom in layout of the sensor pattern layer 220 is improved.
- the electrode 2220 is a wiring, the occupied width of the wiring can be reduced.
- [Setting of periodic SPN] 11A to 11D are plan views showing the color filter layer 121 and four types of sensor pattern layers 222 having different periods SPN in an overlapping manner.
- the area where the portion where the electrode 2220 is not formed overlaps with the color filter 121B is smaller than the area where the color filter overlaps with other color filters.
- SPN 2 ⁇ (3 ⁇ CFSY) / TAN ( ⁇ ).
- the area where the portion where the electrode 2220 is not formed and the color filter of each color overlaps is substantially equal.
- SPN 2 ⁇ (4 ⁇ CFSY) / TAN ( ⁇ ).
- the area where the portion where the electrode 2220 is not formed overlaps the color filter of each color is substantially equal.
- SPN 2 ⁇ (5 ⁇ CFSY) / TAN ( ⁇ ).
- the area where the portion where the electrode 2220 is not formed overlaps the color filter of each color is substantially equal.
- the display device with a touch panel preferably satisfies the following formula (4).
- the display device with a touch panel more preferably satisfies the following formula (5).
- SPN (6 ⁇ CFSY) / TAN ( ⁇ ) (5)
- the display device with a touch panel according to the second embodiment of the present invention has been described above. According to this embodiment, the degree of freedom of layout of the electrode 2220 can be improved.
- moire occurs when the sensor interval is close to an integer multiple of pixels in the color filter alignment direction.
- the case where the sensor interval SY is set to CFSY ⁇ 4 to CFSY ⁇ 5 has been described as a condition for preventing the sensor interval from becoming an integral multiple of the pixel. That is, the case where the sensor interval SY is set to 4/3 times to 5/3 times the pixel has been described.
- the sensor interval SY since the sensor interval SY need not be an integer multiple of the pixel, the sensor interval SY is set to CFSY ⁇ 7 to CFSY ⁇ 8 (7/3 to 8/3 times the pixel), CFSY ⁇ 10 to CFSY ⁇ 11 ( It may be set to 10/3 to 11/3 times the pixel),. That is, m may be a positive integer, and the sensor interval SY may be set to CFSY ⁇ (3 ⁇ m + 1) to CFSY ⁇ (3 ⁇ (m + 1) ⁇ 1).
- the color filter layer includes a red color filter, a green color filter, and a blue color filter.
- the combination of color filters is not limited to the above.
- the color filter layer may include four or more color filters.
- the color filter layer may further include a white color filter in addition to a red color filter, a green color filter, and a blue color filter.
Abstract
Description
CFSY×(n×m+1)≦SY≦CFSY×(n×(m+1)-1)…(1)
CFSY×(n×m+1)≦SY≦CFSY×(n×(m+1)-1)…(1)
CFSY×4≦SY≦CFSY×5…(2)
atan(2/3×CFSY/CFX)≦θ≦atan(2×CFSY/CFX)…(3)
SPN≧(6×CFSY)/TAN(θ)…(4)
SPN=(6×CFSY)/TAN(θ)…(5)
以下、図面を参照し、本発明の実施の形態を詳しく説明する。図中同一または相当部分には同一符号を付してその説明は繰り返さない。なお、説明を分かりやすくするために、以下で参照する図面においては、構成が簡略化または模式化して示されたり、一部の構成部材が省略されたりしている。また、各図に示された構成部材間の寸法比は、必ずしも実際の寸法比を示すものではない。
[タッチパネル付き表示装置の構成]
図1は、本発明の第1の実施形態にかかるタッチパネル付き表示装置1の構成を模式的に示す断面図である。タッチパネル付き表示装置1は、互いに対向して配置されたアクティブマトリクス基板11およびカラーフィルタ基板12と、これらの基板の間に封入された液晶層13と、偏光板14および15とを備えている。
CFSY×4≦SY≦CFSY×5…(2)
atan(2/3×CFSY/CFX)≦θ≦atan(2×CFSY/CFX)…(3)
図4は、タッチパネル付き表示装置1の効果を説明するための模式的断面図である。タッチパネル付き表示装置1には、図示しない光源から、偏光板14に向かって光が照射される。図4および後述する図5では、タッチパネル付き表示装置1に照射される光を、白抜の矢印で模式的に示している。また、カラーフィルタ層121を通過した光を、通過したカラーフィルタと同じハッチングを付した矢印で模式的に示している。カラーフィルタ層121を通過した光については、矢印の長さによって輝度を模式的に示している。
図6A~図6Dは、カラーフィルタ層121と、センサ間隔SYの異なる4種類のセンサパターン層122とを重ねて示す平面図である。
CFSY×4≦SY≦CFSY×5…(2)
図7A~図7Dは、カラーフィルタ層121と、バイアス角θの異なる4種類のセンサパターン層122とを重ねて示す平面図である。
atan(2/3×CFSY/CFX)≦θ≦atan(2×CFSY/CFX)…(3)
以下、本実施形態のより具体的な構成例を説明する。
本発明の第2の実施形態にかかるタッチパネル付き表示装置は、タッチパネル付き表示装置1のセンサパターン層122に代えて、センサパターン層222を備えている。
図11A~図11Dは、カラーフィルタ層121と、周期SPNの異なる4種類のセンサパターン層222とを重ねて示す平面図である。
SPN≧(6×CFSY)/TAN(θ)…(4)
SPN=(6×CFSY)/TAN(θ)…(5)
以上、本発明についての実施形態を説明したが、本発明は上述の各実施形態のみに限定されず、発明の範囲内で種々の変更が可能である。また、各実施形態は、適宜組み合わせて実施することが可能である。
CFSY×(n×m+1)≦SY≦CFSY×(n×(m+1)-1)…(1)
Claims (5)
- 互いに直交する第1方向および第2方向に沿ってマトリクス状に配置される複数の画素を含むカラーフィルタ層と、
前記第2方向に沿って所定のセンサ間隔SYで配置される複数の電極を含み、前記第1方向および前記第2方向に垂直な方向から見て前記カラーフィルタ層と重なるように配置されるセンサパターン層とを備え、
前記複数の画素の各々は、nを3以上の整数として、互いに異なる波長域の光を透過するn個のカラーフィルタを含み、
前記のn個のカラーフィルタは、前記第2方向に沿って所定のサブ画素間隔CSFYで配置され、
前記センサ間隔SY、および前記サブ画素間隔CSFYは、mを正の整数として、下記の式(1)を満たす、タッチパネル付き表示装置。
CFSY×(n×m+1)≦SY≦CFSY×(n×(m+1)-1)…(1) - 前記カラーフィルタの数nが3であり、
下記の式(2)を満たす、請求項1に記載のタッチパネル付き表示装置。
CFSY×4≦SY≦CFSY×5…(2) - 前記複数の画素は、前記第1方向に沿って所定の画素間隔CFXで配置され、
前記複数の透明電極の各々は、前記第1方向とバイアス角θをなすように形成され、
前記サブ画素間隔CSFY、前記画素間隔CFX、および前記バイアス角は、下記の式(3)を満たす、請求項2に記載のタッチパネル付き表示装置。
atan(2/3×CFSY/CFX)≦θ≦atan(2×CFSY/CFX)…(3) - 前記複数の電極の各々は、前記第1方向に沿って所定の周期SPNの1/2毎に、前記第1方向となす角度が反転するように折り返し、
前記サブ画素間隔CSFY、前記バイアス角θ、および前記周期SPNは、下記の式(4)を満たす、請求項3に記載のタッチパネル付き表示装置。
SPN≧(6×CFSY)/TAN(θ)…(4) - 前記サブ画素間隔CSFY、前記バイアス角θ、および前記周期SPNは、下記の式(5)を満たす、請求項4に記載のタッチパネル付き表示装置。
SPN=(6×CFSY)/TAN(θ)…(5)
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JP2016510161A JP6230696B2 (ja) | 2014-03-28 | 2015-02-26 | タッチパネル付き表示装置 |
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JP2019020486A (ja) * | 2017-07-12 | 2019-02-07 | 大日本印刷株式会社 | 表示パネル、及び表示装置 |
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JP2020134752A (ja) * | 2019-02-21 | 2020-08-31 | 三菱電機株式会社 | 液晶表示装置 |
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