CN108873447B - Touch control display device - Google Patents
Touch control display device Download PDFInfo
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- CN108873447B CN108873447B CN201810614640.XA CN201810614640A CN108873447B CN 108873447 B CN108873447 B CN 108873447B CN 201810614640 A CN201810614640 A CN 201810614640A CN 108873447 B CN108873447 B CN 108873447B
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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
- G02F1/133528—Polarisers
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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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- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses a touch display device, which comprises a light emitting module, a touch sensing module, a circular polarization layer and a transparent cover plate. The touch sensing module and the circular polarization layer are stacked with each other to be arranged on the light emitting module, and the circular polarization layer is provided with a liquid crystal molecule stacking layer. The transparent cover plate is arranged on the touch sensing module or the circular polarization layer. The invention uses liquid crystal molecules to form the circular polarization layer, thereby avoiding using a supporting substrate and any adhesive, further greatly reducing the overall thickness and facilitating bending.
Description
Technical Field
The present invention relates to a touch display device, and more particularly, to a foldable touch display device.
Background
In recent years, Touch panels (Touch panels) have been widely applied to various electronic products, such as: global Positioning System (GPS), Personal Digital Assistant (PDA), cellular phone (cellular phone), and Hand-held PC (Hand-held PC) to replace the conventional input devices (such as keyboard and mouse). The great change in design not only improves the human-computer interface affinity of the electronic devices, but also saves more space for installing a display panel with a larger size for the convenience of users to browse data because the traditional input device is omitted. In a conventional touch display device, a circular polarizing plate is composed of a linear polarizing layer and a quarter-wave plate, wherein the linear polarizing layer is formed by stretching a low-cost polyvinyl alcohol (PVA) film and then absorbing iodine molecules, and since the PVA film shrinks after being stretched and loses directionality, a Triacetylcellulose (TAC) film needs to be attached to the upper and lower portions of the linear polarizing layer, and then a pressure sensitive adhesive and the quarter-wave plate are pressed together.
Therefore, the present invention provides a touch display device to solve the above problems.
Disclosure of Invention
The main objective of the present invention is to provide a touch display device, which utilizes a liquid crystal molecule stack layer to form a circular polarization layer, so as to avoid using a supporting substrate and any adhesive, thereby greatly reducing the overall thickness and facilitating bending.
To achieve the above object, the present invention provides a touch display device, which includes a light emitting module, a touch sensing module, a circular polarizing layer and a transparent cover. The touch sensing module and the circular polarization layer are stacked with each other to be arranged on the light emitting module, and the circular polarization layer is provided with a liquid crystal molecule stacking layer. The transparent cover plate is arranged on the touch sensing module or the circular polarization layer. For example, the light emitting module is an Active Matrix Organic Light Emitting Diode (AMOLED) module,
in an embodiment of the present invention, the circularly polarizing layer further includes an alignment layer, and the circularly polarizing layer is formed by coating, and the alignment layer is made of polyvinyl alcohol (PVA) or Polyimide (PI).
In an embodiment of the invention, the touch sensing module further includes a first optical adhesive layer, a transparent substrate, a touch sensing layer and a second optical adhesive layer. The first optical adhesive layer is arranged on the light-emitting module, the transparent substrate is arranged on the first optical adhesive layer, the touch sensing layer is arranged on the transparent substrate, the second optical adhesive layer is arranged on the touch sensing layer, and the circular polarization layer is arranged on the second optical adhesive layer.
In an embodiment of the invention, the touch sensing module further includes a first optical adhesive layer, a touch sensing layer, a transparent substrate and a second optical adhesive layer. The first optical adhesive layer is arranged on the light-emitting module, the touch sensing layer is arranged on the first optical adhesive layer, the transparent substrate is arranged on the touch sensing layer, the second optical adhesive layer is arranged on the transparent substrate, and the circular polarization layer is arranged on the second optical adhesive layer.
In an embodiment of the present invention, the liquid crystal molecule stacking layer further includes at least one retardation film and a linear polarization layer. The phase difference film is composed of optically active liquid crystal molecules and is arranged on the second optical adhesive layer. The linear polarization layer is composed of liquid crystal molecules, the linear polarization layer is arranged on the phase difference film, the alignment layer is arranged on the linear polarization layer, and the transparent cover plate is arranged on the alignment layer.
In one embodiment of the present invention, the number of the retardation films is two, which is a half-wavelength retardation film and a quarter-wavelength retardation film, the quarter-wavelength retardation film is disposed on the second optical adhesive layer, the half-wavelength retardation film is disposed on the quarter-wavelength retardation film, and the linear polarization layer is disposed on the half-wavelength retardation film.
In an embodiment of the present invention, the liquid crystal molecule stacking layer further includes at least one retardation film and a linear polarization layer. The phase difference film is composed of optical rotation liquid crystal molecules, and is arranged on the light emitting module through the alignment layer. The linear polarization layer is composed of liquid crystal molecules, the linear polarization layer is arranged on the phase difference film, and the touch sensing module is arranged on the linear polarization layer.
In one embodiment of the present invention, the number of the retardation films is two, which is a half-wavelength retardation film and a quarter-wavelength retardation film, the quarter-wavelength retardation film is disposed on the alignment layer, the half-wavelength retardation film is disposed on the quarter-wavelength retardation film, and the linear polarization layer is disposed on the half-wavelength retardation film.
In an embodiment of the invention, the touch sensing module further includes a first optical adhesive layer, a transparent substrate, a touch sensing layer and a second optical adhesive layer. The first optical adhesive layer is arranged on the linear polarization layer, the transparent substrate is arranged on the first optical adhesive layer, the touch sensing layer is arranged on the transparent substrate, the second optical adhesive layer is arranged on the touch sensing layer, and the transparent cover plate is arranged on the second optical adhesive layer.
In an embodiment of the invention, the touch sensing module further includes a first optical adhesive layer, a touch sensing layer, a transparent substrate and a second optical adhesive layer. The first optical adhesive layer is arranged on the linear polarization layer, the touch sensing layer is arranged on the first optical adhesive layer, the transparent substrate is arranged on the touch sensing layer, the second optical adhesive layer is arranged on the transparent substrate, and the transparent cover plate is arranged on the second optical adhesive layer.
In an embodiment of the invention, the touch sensing module further includes a first optical adhesive layer, a transparent substrate and a touch sensing layer. The first optical adhesive layer is arranged on the light-emitting module, the transparent substrate is arranged on the first optical adhesive layer, the touch sensing layer is arranged on the transparent substrate, and the circular polarization layer is arranged on the touch sensing layer.
In an embodiment of the invention, the circular polarizing layer further includes a second optical adhesive layer, and the liquid crystal molecule stacking layer further includes at least one retardation film and a linear polarizing layer. The phase difference film is composed of optical rotation liquid crystal molecules and is arranged on the touch sensing layer. The linear polarization layer is composed of liquid crystal molecules, the linear polarization layer is arranged on the phase difference film, and the transparent cover plate is arranged on the linear polarization layer through the second optical adhesive layer.
In an embodiment of the invention, the number of the retardation films is two, which is a half-wavelength retardation film and a quarter-wavelength retardation film, the quarter-wavelength retardation film is disposed on the touch sensing layer, the half-wavelength retardation film is disposed on the quarter-wavelength retardation film, and the linear polarization layer is disposed on the half-wavelength retardation film.
In an embodiment of the invention, the touch sensing module further includes a first optical adhesive layer, a touch sensing layer and a transparent substrate. The first optical adhesive layer is arranged on the light-emitting module, the touch sensing layer is arranged on the first optical adhesive layer, the transparent substrate is arranged on the touch sensing layer, and the circular polarization layer is arranged on the transparent substrate.
In an embodiment of the invention, the circular polarizing layer further includes a second optical adhesive layer, and the liquid crystal molecule stacking layer further includes at least one retardation film and a linear polarizing layer. The retardation film is composed of optically active liquid crystal molecules, and is provided on the transparent substrate. The linear polarization layer is composed of liquid crystal molecules, the linear polarization layer is arranged on the phase difference film, and the transparent cover plate is arranged on the linear polarization layer through the second optical adhesive layer.
In one embodiment of the present invention, the number of the retardation films is two, which is a half-wavelength retardation film and a quarter-wavelength retardation film, the quarter-wavelength retardation film is disposed on the transparent substrate, the half-wavelength retardation film is disposed on the quarter-wavelength retardation film, and the linear polarization layer is disposed on the half-wavelength retardation film.
In an embodiment of the invention, the circular polarizing layer further includes a first optical adhesive layer, and the liquid crystal molecule stacking layer further includes at least one retardation film and a linear polarizing layer. The phase difference film is composed of optical rotation liquid crystal molecules and is arranged on the light-emitting module through the first optical adhesive layer. The linear polarization layer is composed of liquid crystal molecules, the linear polarization layer is arranged on the phase difference film, and the touch sensing module is arranged on the linear polarization layer.
In one embodiment of the present invention, the number of the retardation films is two, which is a half-wavelength retardation film and a quarter-wavelength retardation film, the quarter-wavelength retardation film is disposed on the first optical adhesive layer, the half-wavelength retardation film is disposed on the quarter-wavelength retardation film, and the linear polarization layer is disposed on the half-wavelength retardation film.
In an embodiment of the invention, the touch sensing module further includes a transparent substrate, a touch sensing layer and a second optical adhesive layer. The transparent substrate is arranged on the linear polarization layer, the touch sensing layer is arranged on the transparent substrate, the second optical adhesive layer is arranged on the touch sensing layer, and the transparent cover plate is arranged on the second optical adhesive layer.
In an embodiment of the invention, the touch sensing module further includes a touch sensing layer, a transparent substrate and a second optical adhesive layer. The touch sensing layer is arranged on the linear polarization layer, the transparent substrate is arranged on the touch sensing layer, the second optical adhesive layer is arranged on the transparent substrate, and the transparent cover plate is arranged on the second optical adhesive layer.
In one embodiment of the present invention, the circularly polarizing layer is formed by coating.
In order to provide further understanding and appreciation of the structural features and advantages of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings, in which:
drawings
Fig. 1 is a cross-sectional view of a touch display device according to a first embodiment of the invention.
FIG. 2 is a cross-sectional view of a touch display device according to a second embodiment of the present invention.
FIG. 3 is a cross-sectional view of a touch display device according to a third embodiment of the present invention.
Fig. 4 is a cross-sectional view of a touch display device according to a fourth embodiment of the invention.
Fig. 5 is a cross-sectional view of a fifth embodiment of the touch display device of the present invention.
Fig. 6 is a cross-sectional view of a touch display device according to a sixth embodiment of the invention.
Fig. 7 is a cross-sectional view of a seventh embodiment of the touch display device of the present invention.
Fig. 8 is a cross-sectional view of an eighth embodiment of the touch display device of the present invention.
Reference numerals:
34 light emitting module 36 touch sensing module
38 circular polarizing layer 40 transparent cover plate
42 liquid crystal molecule stacked layer 44 alignment layer
46 first optical adhesive layer 48 transparent substrate
50 touch-sensing layer 52 second optical adhesive layer
54 phase difference film 56 linear polarizing layer
58 shielding layer 60 half-wavelength phase difference film
62 quarter-wave retardation film 64 light emitting module
66 circular polarizing layer 68 touch sensing module
70 transparent cover plate 72 liquid crystal molecular stack layer
74 alignment layer 76 phase difference film
78 linear polarizing layer 80 half wavelength phase difference film
82 quarter-wave retardation film 84 first optical adhesive layer
86 transparent substrate 88 touch sensing layer
90 second optical adhesive layer 92 shielding layer
94 light-emitting module 96 touch sensing module
98 circular polarizing layer 100 transparent cover plate
102 liquid crystal molecular stack layer 104 first optical adhesive layer
106 transparent substrate 108 touch sensing layer
110 second optical adhesive layer 112 phase difference film
114 linear polarizing layer 116 masking layer
118 half-wavelength retardation film 120 quarter-wavelength retardation film
122 light emitting module 124 circular polarizing layer
126 transparent cover for touch sensing module 128
130 liquid crystal molecule stacked layer 132 first optical adhesive layer
134 phase difference film 136 linear polarizing layer
138 half-wavelength retardation film 140 quarter-wavelength retardation film
142 transparent substrate 144 touch sensing layer
146 second optical adhesive layer 148 shielding layer
Detailed Description
Embodiments of the present invention will be further explained by referring to the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts. In the drawings, the shape and thickness may be exaggerated for simplicity and convenience. It is to be understood that elements not specifically shown in the drawings or described in the specification are of a type well known to those of ordinary skill in the art. Many variations and modifications may be made by one of ordinary skill in the art in light of the teachings of the present invention.
Referring to fig. 1, a first embodiment of a touch display device according to the invention is described. The touch display device includes a light emitting module 34, a touch sensing module 36, a circular polarization layer 38 and a transparent cover 40. The touch sensing module 36 and the circular polarizing layer 38 are stacked on each other to be disposed on the light emitting module 34, the circular polarizing layer 38 has a liquid crystal molecule stacking layer 42 and an alignment layer 44, and the circular polarizing layer 38 is formed by coating. The transparent cover 40 is disposed on the touch sensing module 36 or the circular polarization layer 38. For example, the light emitting module 34 is an Active Matrix Organic Light Emitting Diode (AMOLED) module, the transparent cover 40 is made of glass, Cyclic Olefin Polymer (COP), inorganic transparent polyimide (CPI) or polyvinylidene chloride (HPVDF), and the alignment layer 44 is made of polyvinyl alcohol (PVA) or Polyimide (PI). In addition, in the first embodiment, the touch sensing module 36, the circular polarizing layer 38 and the transparent cover 40 are sequentially stacked on the light emitting module 34. In the manufacturing process, the liquid crystal molecule stack layer 42 and the alignment layer 44 are coated on the transparent cover 40 first and then combined with other components, and no adhesive is needed in the coating process, so that the overall thickness of the touch display device can be greatly reduced.
Specifically, the touch sensing module 36 further includes a first optical adhesive layer 46, a transparent substrate 48, a touch sensing layer 50 and a second optical adhesive layer 52. The first optical adhesive layer 46 is disposed on the light emitting module 34, the transparent substrate 48 is disposed on the first optical adhesive layer 46, the touch sensing layer 50 is disposed on the transparent substrate 48, the second optical adhesive layer 52 is disposed on the touch sensing layer 50, and the circular polarization layer 38 is disposed on the second optical adhesive layer 52. For example, the transparent substrate 48 can be selected from a material with birefringence (Re) greater than 5, and the Retardation is Re when two beams of polarized light incident perpendicularly to each other have a Retardation. The material with birefringence is polyethylene terephthalate (PET) or inorganic transparent polyimide (CPI). In addition, the transparent substrate 48 may also be made of a material without birefringence, i.e., Re is less than 5. The non-birefringent material is glass, Cyclic Olefin Polymer (COP), polyvinylidene chloride (HPVDF), Cyclic Block Copolymer (CBC) or Polycarbonate (PC). The touch sensing layer 50 may be a metal mesh (metal mesh) of copper or silver or a nano silver wire (AgNWs). Alternatively, the touch sensing layer 50 is made of Indium Tin Oxide (ITO), poly (3, 4-ethylenedioxythiophene) (PEDOT) or Carbon Nanotubes (CNT).
The liquid crystal molecular stack layer 42 further includes at least one retardation film 54 and a linear polarization layer 56. The retardation film 54 is composed of optically active liquid crystal molecules, and the retardation film 54 is provided on the second optical adhesive layer 52. The linear polarization layer 56 is composed of liquid crystal molecules, the linear polarization layer 56 is disposed on the retardation film 54, the alignment layer 44 is disposed on the linear polarization layer 56, and the transparent cover plate 40 is disposed on the alignment layer 44. In addition, a shielding layer 58 formed of ink is applied between the alignment layer 44 and the transparent cover 40. The linear polarizing layer 56 has a thickness of 1-5 microns. In the first embodiment, the number of the retardation films 54 is two, which are the half-wavelength retardation film 60 and the quarter-wavelength retardation film 62, the quarter-wavelength retardation film 62 is disposed on the second optical adhesive layer 52, the half-wavelength retardation film 60 is disposed on the quarter-wavelength retardation film 62, and the linear polarization layer 56 is disposed on the half-wavelength retardation film 60. The quarter-wave retardation film 62 has a thickness of 1 to 5 μm. The polarizing angle between the quarter-wave retardation film 62 and the linear polarizing layer 56 is 45 degrees, the polarizing brightness is 80-99.5%, the transmittance is 33-45%, and the flexible diameter is 2 mm. Since the liquid crystal molecule stacking layer 42 and the alignment layer 44 are used to form the circular polarization layer 38, the thin film does not need to be stretched, so as to avoid using a supporting substrate and any adhesive, thereby greatly reducing the overall thickness and facilitating bending.
Referring to fig. 2, a second embodiment of the touch display device of the present invention is described. The difference between the second embodiment and the first embodiment is the touch sensing module 36, and the rest of the structure is the same as that of the first embodiment, which is not described herein again. In the second embodiment, the touch sensing module 36 further includes a first optical adhesive layer 46, a touch sensing layer 50, a transparent substrate 48 and a second optical adhesive layer 52. The first optical adhesive layer 46 is disposed on the light emitting module 34, the touch sensing layer 50 is disposed on the first optical adhesive layer 46, the transparent substrate 48 is disposed on the touch sensing layer 50, the second optical adhesive layer 52 is disposed on the transparent substrate 48, and the circular polarization layer 38 is disposed on the second optical adhesive layer 52.
Referring to fig. 3, a third embodiment of the touch display device of the present invention is described. The touch display device includes a light emitting module 64, a circular polarizing layer 66, a touch sensing module 68 and a transparent cover 70. The touch sensing module 68 and the circular polarizing layer 66 are stacked on each other to be disposed on the light emitting module 64, the circular polarizing layer 66 has a liquid crystal molecule stack layer 72 and an alignment layer 74, and the circular polarizing layer 66 is formed by coating. The transparent cover 70 is disposed on the touch sensing module 68 or the circular polarization layer 66. For example, the light emitting module 64 is an Active Matrix Organic Light Emitting Diode (AMOLED) module, the transparent cover 70 is made of glass, Cyclic Olefin Polymer (COP), inorganic transparent polyimide (CPI) or polyvinylidene chloride (HPVDF), and the alignment layer 74 is made of polyvinyl alcohol (PVA) or Polyimide (PI). In addition, in the first embodiment, the circular polarizing layer 66, the touch sensing module 68 and the transparent cover plate 70 are sequentially stacked on the light emitting module 64. In the manufacturing process, the liquid crystal molecule stack layer 72 and the alignment layer 74 are coated on the light emitting module 64 and then combined with other components, and no adhesive is needed in the coating process, so that the overall thickness of the touch display device can be greatly reduced.
Specifically, the liquid crystal molecule stacking layer 72 further includes at least one retardation film 76 and a linear polarization layer 78. The retardation film 76 is made of optically active liquid crystal molecules, and the retardation film 76 is provided on the light emitting module 64 through the alignment layer 74. The linear polarizing layer 78 is made of liquid crystal molecules, the linear polarizing layer 78 is disposed on the retardation film 76, and the touch sensing module 68 is disposed on the linear polarizing layer 78. In the third embodiment, the number of the retardation films 76 is two, which is a half-wavelength retardation film 80 and a quarter-wavelength retardation film 82, the quarter-wavelength retardation film 82 is provided on the alignment layer 74, the half-wavelength retardation film 80 is provided on the quarter-wavelength retardation film 82, and the linearly polarizing layer 78 is provided on the half-wavelength retardation film 80. The thickness of the linearly polarizing layer 78 and the quarter-wave retardation film 82 are both 1-5 μm. The linear polarization layer 78 and the quarter-wave retardation film 82 have a polarization angle of 45 degrees, a polarization brightness of 80-99.5%, a transmittance of 33-45%, and a flexible diameter of 2 mm. Since the liquid crystal molecule stack layer 72 and the alignment layer 74 are used to form the circular polarization layer 66, the thin film does not need to be stretched, thereby avoiding the use of a supporting substrate and any adhesive, and further greatly reducing the overall thickness for bending.
The touch sensing module 68 further includes a first optical adhesive layer 84, a transparent substrate 86, a touch sensing layer 88 and a second optical adhesive layer 90. The first optical adhesive layer 84 is disposed on the linear polarization layer 78, the transparent substrate 86 is disposed on the first optical adhesive layer 84, the touch sensing layer 88 is disposed on the transparent substrate 86, the second optical adhesive layer 90 is disposed on the touch sensing layer 88, and the transparent cover plate 70 is disposed on the second optical adhesive layer 90. In addition, a shielding layer 92 formed by ink is coated between the second optical adhesive layer 90 and the transparent cover plate 70. For example, the transparent substrate 86 may be made of a material having a birefringence (Re) greater than 5, and the Retardation is Re when two beams of polarized light are polarized perpendicularly to each other. The material with birefringence is polyethylene terephthalate (PET) or inorganic transparent polyimide (CPI). In addition, the transparent substrate 86 may also be selected to have no birefringence, i.e., Re is less than 5. The non-birefringent material is glass, Cyclic Olefin Polymer (COP), polyvinylidene chloride (HPVDF), Cyclic Block Copolymer (CBC) or Polycarbonate (PC). The touch sensing layer 88 may be a metal mesh (metal mesh) of copper or silver or nano silver wires (AgNWs). Alternatively, the touch sensing layer 88 is made of Indium Tin Oxide (ITO), poly (3, 4-ethylenedioxythiophene) (PEDOT) or Carbon Nanotube (CNT).
Referring to fig. 4, a fourth embodiment of the touch display device of the present invention is described. The difference between the fourth embodiment and the third embodiment is the touch sensing module 68, and the rest of the structure is the same as that of the third embodiment, which is not described herein again. In the fourth embodiment, the touch sensing module 68 further includes a first optical adhesive layer 84, a touch sensing layer 88, a transparent substrate 86 and a second optical adhesive layer 90. The first optical adhesive layer 84 is disposed on the linear polarization layer 78, the touch sensing layer 88 is disposed on the first optical adhesive layer 84, the transparent substrate 86 is disposed on the touch sensing layer 88, the second optical adhesive layer 90 is disposed on the transparent substrate 86, and the transparent cover plate 70 is disposed on the second optical adhesive layer 90.
Referring to fig. 5, a fifth embodiment of the touch display device of the present invention is described. The touch display device includes a light emitting module 94, a touch sensing module 96, a circular polarization layer 98 and a transparent cover 100. The touch sensing module 96 and the circular polarizing layer 98 are stacked on each other to be disposed on the light emitting module 94, the circular polarizing layer 98 has a liquid crystal molecule stacked layer 102, and the circular polarizing layer 98 is formed by coating. The transparent cover 100 is disposed on the touch sensing module 96 or the circular polarization layer 98. For example, the light emitting module 94 is an Active Matrix Organic Light Emitting Diode (AMOLED) module, and the material of the transparent cover 100 is glass, Cyclic Olefin Polymer (COP), inorganic transparent polyimide (CPI) or polyvinylidene chloride (HPVDF). In addition, in the fifth embodiment, the touch sensing module 96, the circular polarizing layer 98 and the transparent cover plate 100 are sequentially stacked on the light emitting module 94.
Specifically, the touch sensing module 96 further includes a first optical adhesive layer 104, a transparent substrate 106 and a touch sensing layer 108. The first optical adhesive layer 104 is disposed on the light emitting module 94, the transparent substrate 106 is disposed on the first optical adhesive layer 104, the touch sensing layer 108 is disposed on the transparent substrate 106, and the circular polarization layer 98 is disposed on the touch sensing layer 108. For example, the transparent substrate 106 may be selected to have a birefringence, i.e., a deceleration (Re) greater than 5, such as polyethylene terephthalate (PET) or inorganic transparent polyimide (CPI). In addition, the transparent substrate 106 may also be made of a material without birefringence, i.e., Re is less than 5. The non-birefringent material is glass, Cyclic Olefin Polymer (COP), polyvinylidene chloride (HPVDF), Cyclic Block Copolymer (CBC) or Polycarbonate (PC). The touch sensing layer 108 may be a metal mesh (metal mesh) of copper or silver or nano silver wires (AgNWs). Alternatively, the touch sensing layer 108 is made of Indium Tin Oxide (ITO), poly (3, 4-ethylenedioxythiophene) (PEDOT) or Carbon Nanotubes (CNT).
The circular polarizing layer 98 further comprises a second optical adhesive layer 110, and the liquid crystal molecular stack layer 102 further comprises at least one retardation film 112 and a linear polarizing layer 114. The retardation film 112 is made of optically active liquid crystal molecules, and the retardation film 112 is disposed on the touch sensing layer 108. The linear polarization layer 114 is composed of liquid crystal molecules, the linear polarization layer 114 is disposed on the retardation film 112, and the transparent cover plate 100 is disposed on the linear polarization layer 114 through the second optical adhesive layer 110. In addition, a shielding layer 116 formed by ink is coated between the second optical adhesive layer 110 and the transparent cover plate 100. Since the retardation film 112 and the linear polarization layer 114 are coated on the touch sensing layer 108, no adhesive exists between the retardation film 112 and the linear polarization layer 114 and between the retardation film 112 and the touch sensing layer 108, so as to achieve the effects of thinning and bending. In the fifth embodiment, the number of the retardation films 112 is two, which is the half-wavelength retardation film 118 and the quarter-wavelength retardation film 120, the quarter-wavelength retardation film 120 is disposed on the touch sensing layer 108, the half-wavelength retardation film 118 is disposed on the quarter-wavelength retardation film 120, and the linear polarization layer 114 is disposed on the half-wavelength retardation film 118. The thickness of the linearly polarizing layer 114 and the quarter-wave retardation film 120 are both 1-10 μm. The linear polarization layer 114 and the quarter-wave retardation film 120 have a polarization angle of 45 degrees, a polarization brightness of 80-99.5%, a transmittance of 33-45%, and a flexible diameter of less than 5 mm. Since the present invention utilizes the liquid crystal molecule stack layer 102 to form the circular polarization layer 98, the thin film does not need to be stretched, thereby avoiding the use of a supporting substrate and any adhesive, and further greatly reducing the overall thickness for bending.
Referring to fig. 6, a sixth embodiment of a touch display device according to the present invention is described. The difference between the sixth embodiment and the fifth embodiment is in the touch sensing module 96, and the rest of the structure is the same as that of the fifth embodiment, which is not described herein again. In the sixth embodiment, the touch sensing module 96 further includes a first optical adhesive layer 104, a touch sensing layer 108 and a transparent substrate 106. The first optical adhesive layer 104 is disposed on the light emitting module 94, the touch sensing layer 108 is disposed on the first optical adhesive layer 104, the transparent substrate 106 is disposed on the touch sensing layer 108, and the quarter-wavelength retardation film 120 of the circular polarization layer 98 is disposed on the transparent substrate 106. Since the retardation film 112 and the linear polarization layer 114 are coated on the transparent substrate 106, no adhesive exists between the retardation film 112 and the linear polarization layer 114 and between the retardation film 112 and the transparent substrate 106, so that the effects of thinning and bending can be achieved.
Referring to fig. 7, a seventh embodiment of a touch display device according to the invention is described. The touch display device includes a light emitting module 122, a circular polarization layer 124, a touch sensing module 126 and a transparent cover plate 128. The touch sensing module 126 and the circular polarizing layer 124 are stacked on each other to be disposed on the light emitting module 122, the circular polarizing layer 124 has a liquid crystal molecule stacking layer 130, and the circular polarizing layer 124 is formed by coating. The transparent cover 128 is disposed on the touch sensing module 126 or the circular polarization layer 124. For example, the light emitting module 122 is an Active Matrix Organic Light Emitting Diode (AMOLED) module, and the transparent cover 128 is made of glass, Cyclic Olefin Polymer (COP), inorganic transparent polyimide (CPI) or polyvinylidene chloride (HPVDF). In addition, in the seventh embodiment, the circular polarizing layer 124, the touch sensing module 126 and the transparent cover plate 128 are sequentially stacked on the light emitting module 122.
Specifically, the circular polarizing layer 124 further includes a first optical adhesive layer 132, and the liquid crystal molecule stacking layer 130 further includes at least one retardation film 134 and a linear polarizing layer 136. The retardation film 134 is made of optically active liquid crystal molecules, and the retardation film 134 is disposed on the light emitting module 122 through the first optical adhesive layer 132. The linear polarizing layer 136 is made of liquid crystal molecules, the linear polarizing layer 136 is disposed on the retardation film 134, and the touch sensing module 126 is disposed on the linear polarizing layer 136. In the seventh embodiment, the number of the retardation films 134 is two, which is the half-wavelength retardation film 138 and the quarter-wavelength retardation film 140, the quarter-wavelength retardation film 140 is disposed on the first optical adhesive layer 132, the half-wavelength retardation film 138 is disposed on the quarter-wavelength retardation film 140, and the linear polarization layer 136 is disposed on the half-wavelength retardation film 138. The thickness of the linear polarization layer 136 and the quarter-wave retardation film 140 are both 1-10 μm. The linear polarization layer 136 and the quarter-wave retardation film 140 have a polarization angle of 45 degrees, a polarization brightness of 80-99.5%, a transmittance of 33-45%, and a flexible diameter of less than 5 mm. Since the liquid crystal molecule stack layer 130 is used to form the circular polarization layer 124, the present invention does not need to stretch the film, thereby avoiding the use of a supporting substrate and any adhesive, and further greatly reducing the overall thickness for bending.
The touch sensing module 126 further includes a transparent substrate 142, a touch sensing layer 144 and a second optical adhesive layer 146. The transparent substrate 142 is disposed on the linear polarization layer 136, the touch sensing layer 144 is disposed on the transparent substrate 142, the second optical adhesive layer 146 is disposed on the touch sensing layer 144, and the transparent cover 128 is disposed on the second optical adhesive layer 146. In addition, a shielding layer 148 formed by ink is coated between the second optical adhesive layer 146 and the transparent cover plate 128. For example, the transparent substrate 142 may be made of a birefringent material, such as polyethylene terephthalate (PET) or inorganic transparent polyimide (CPI). In addition, the transparent substrate 142 may also be made of a material without birefringence, such as glass, Cyclic Olefin Polymer (COP), polyvinylidene chloride (HPVDF), Cyclic Block Copolymer (CBC), or Polycarbonate (PC). The touch sensing layer 144 may be a metal mesh (metal mesh) of copper or silver or a nano silver wire (AgNWs). Alternatively, the touch sensing layer 144 is made of Indium Tin Oxide (ITO), poly (3, 4-ethylenedioxythiophene) (PEDOT) or Carbon Nanotubes (CNT). Since the retardation film 134 and the linear polarization layer 136 are coated on the transparent substrate 142, no adhesive exists between the retardation film 134 and the linear polarization layer 136 and between the linear polarization layer 136 and the transparent substrate 142, so that the effects of thinning and bending can be achieved.
Referring to fig. 8, an eighth embodiment of the touch display device of the present invention is described. The difference between the eighth embodiment and the seventh embodiment is in the touch sensing module 126, and the rest of the structure is the same as that of the seventh embodiment, which is not described herein again. In the eighth embodiment, the touch sensing module 126 further includes a touch sensing layer 144, a transparent substrate 142 and a second optical adhesive layer 146. The touch sensing layer 144 is disposed on the linear polarization layer 136, the transparent substrate 142 is disposed on the touch sensing layer 144, the second optical adhesive layer 146 is disposed on the transparent substrate 142, and the transparent cover 128 is disposed on the second optical adhesive layer 146. Since the retardation film 134 and the linear polarization layer 136 are coated on the touch sensing layer 144, no adhesive exists between the retardation film 134 and the linear polarization layer 136 and between the linear polarization layer 136 and the touch sensing layer 144, so that the effects of thinning and bending can be achieved.
In summary, the invention utilizes the liquid crystal molecule stack layer to form the circular polarization layer, so as to avoid using a supporting substrate and any adhesive, thereby greatly reducing the overall thickness of the touch display device, and facilitating bending.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, so that equivalent variations and modifications in the shape, structure, characteristics and spirit of the present invention as described in the claims should be included in the claims of the present invention.
Claims (2)
1. A touch display device, comprising:
a light emitting module;
a touch sensing module and a circular polarizing layer stacked with each other to be disposed on the light emitting module, the circular polarizing layer having a liquid crystal molecule stacked layer; and
the transparent cover plate is arranged on the touch sensing module or the circular polarization layer;
wherein the circular polarization layer does not comprise a supporting substrate, the liquid crystal molecule stacking layer comprises at least one phase difference film and a linear polarization layer, and the phase difference film and the linear polarization layer are arranged in an unstructured way;
wherein the at least one phase difference film is composed of optically active liquid crystal molecules, the linear polarization layer is composed of liquid crystal molecules, the number of the at least one phase difference film is two, the two phase difference films are a half-wavelength phase difference film and a quarter-wavelength phase difference film, and the half-wavelength phase difference film and the quarter-wavelength phase difference film are arranged in a non-structure manner;
wherein the circular polarization layer further comprises an alignment layer, the circular polarization layer is formed by coating, and a shielding layer is coated between the alignment layer and the transparent cover plate;
wherein the touch sensing module comprises:
the first optical adhesive layer is arranged on the light-emitting module;
a transparent substrate arranged on the first optical adhesive layer;
a touch sensing layer arranged on the transparent substrate; and
the second optical adhesive layer is arranged on the touch sensing layer, the circular polarization layer is arranged on the second optical adhesive layer, the quarter-wavelength phase difference film is arranged on the second optical adhesive layer, the half-wavelength phase difference film is arranged on the quarter-wavelength phase difference film, the linear polarization layer is arranged on the half-wavelength phase difference film, the alignment layer is arranged on the linear polarization layer, and the transparent cover plate is arranged on the alignment layer.
2. The touch display device of claim 1, wherein the light emitting module is an active matrix organic light emitting diode module.
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| CN201810614640.XA CN108873447B (en) | 2018-06-14 | 2018-06-14 | Touch control display device |
| TW107122410A TWI670632B (en) | 2018-06-14 | 2018-06-28 | Touch display device |
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| CN201810614640.XA CN108873447B (en) | 2018-06-14 | 2018-06-14 | Touch control display device |
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| CN109659340B (en) * | 2018-12-12 | 2021-01-01 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN112419881A (en) * | 2019-08-20 | 2021-02-26 | 华为技术有限公司 | Cover plate and display screen |
| CN110531897A (en) * | 2019-09-09 | 2019-12-03 | 业成科技（成都）有限公司 | Cover plate assembly, preparation method, touch panel and display device |
| CN113488603B (en) * | 2021-07-07 | 2023-08-25 | 业成科技（成都）有限公司 | Method for manufacturing optical display device |
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| TWI670632B (en) | 2019-09-01 |
| CN108873447A (en) | 2018-11-23 |
| TW202001522A (en) | 2020-01-01 |
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