Patent Application
20120169633
a. Field of the Invention
The invention relates to a touch-sensitive display device.
b. Description of the Related Art
Referring to
Taiwan patent no. M368846 discloses a touch panel adhered to a display screen by an adhesive layer. Taiwan patent application publication no. 201011388 discloses an embedded touch-sensitive liquid crystal panel, where a touch-sensitive element is directly disposed inside the liquid crystal panel. Taiwan patent application publication no. 200949649 discloses a touch-sensitive liquid crystal panel having a liquid crystal layer interposed between a top substrate and a bottom substrate, and an insulating layer, a conductive layer and a buffer layer are formed in succession on an inner surface of the top substrate to form a capacitive touch panel.
The invention provides a touch-sensitive display device having simplified assembly processes, reduced assembly hours, thin shape and low fabrication costs.
Other objects and advantages of the invention may be further illustrated by the technical features broadly embodied and described as follows. In order to achieve one or a portion of or all of the objects or other objects, one embodiment of the invention provides a touch-sensitive display device including a liquid crystal display module and a touch-sensitive element attached to a surface of the liquid crystal display module.
In one embodiment, an optical adhesive is interposed between the liquid crystal display module and the touch-sensitive element, and the touch-sensitive element is adhered to the surface of the liquid crystal display module by the optical adhesive.
In one embodiment, a double-sided adhesive tape is disposed in a non-active area of the liquid crystal display module, and the touch-sensitive element is adhered to the surface of the liquid crystal display module by the double-sided adhesive tape.
In one embodiment, the liquid crystal display module includes a top polarizer and a bottom polarizer opposite the top polarizer, and the touch-sensitive element is adhered to the top polarizer.
In one embodiment, the touch-sensitive element includes a transparent substrate and a touch-sensitive circuit printed on a surface of the transparent substrate.
In one embodiment, the touch-sensitive element and the liquid crystal display module are confined in a front bezel and attached to a back frame.
In one embodiment, the touch-sensitive display device includes a tape for limiting the position of the touch-sensitive element and the liquid crystal display module and adhering the touch-sensitive element and the liquid crystal display module to a back frame.
Another embodiment of the invention provides a touch-sensitive display device having a liquid crystal panel and a backlight module. The backlight module is disposed on one side of the liquid crystal panel and including a light source, a light guide plate capable of guiding a light beam emitted by the light source, and a film set disposed between the light guide plate and the liquid crystal panel. The film set includes at least a touch-sensitive element, a diffusion sheet and a brightness enhancement film stacked with each other.
Another embodiment of the invention provides a touch-sensitive display device having a liquid crystal panel, a backlight module and a touch-sensitive circuitry layer. The backlight module includes a light source, a light guide plate capable of guiding a light beam emitted by the light source, and an optical film set disposed between the light guide plate and the liquid crystal panel. The optical film set includes at least a diffusion sheet and a brightness enhancement film stacked with each other. The touch-sensitive circuitry layer is printed on at least one of the liquid crystal panel, the light guide plate and the optical film set.
The embodiment or the embodiments of the invention may have at least one of the following advantages. According to the above embodiments, the touch-sensitive element is adhered to a surface of the liquid crystal display module, so the touch-sensitive element and the liquid crystal display module are combined with each other as a single piece. Further, the touch-sensitive element and the liquid crystal display module that are combined with each other as a single piece are directly attached to a back frame by a fastener. Therefore, assembly processes of the touch-sensitive display device are simplified, and assembly hours, packing and transportation costs, the possibility of damage to materials, and the overall thickness of a finished product are all reduced. Besides, since the touch-sensitive element and the liquid crystal display module are integrated as one piece, the buffer material used in a conventional design is no longer needed to further reduce fabrication costs, and possible electrostatic adhesion between the touch-sensitive element and the liquid crystal display module is also avoided. Similarly, the touch-sensitive element is not liable to bend due to gravity to avoid the formation of Newton's rings and thus improve display quality. In addition, the touch-sensitive element may be stacked with optical films to together form a film set to therefore lower production defective rate and material costs for adhesion. Besides, a touch-sensitive circuitry layer may be directly printed on at least one of a liquid crystal panel, a light guide plate and an optical film set to further reduce fabrication costs and the overall thickness of a finished product.
Other objectives, features and advantages of the invention will be further understood from the further technological features disclosed by the embodiments of the invention wherein there are shown and described preferred embodiments of this invention, simply by way of illustration of modes best suited to carry out the invention.
In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof, and in which are shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology, such as “top,” “bottom,” “front,” “back,” etc., is used with reference to the orientation of the Figure(s) being described. The components of the present invention can be positioned in a number of different orientations. As such, the directional terminology is used for purposes of illustration and is in no way limiting. On the other hand, the drawings are only schematic and the sizes of components may be exaggerated for clarity. It is to be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the present invention. Also, it is to be understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless limited otherwise, the terms “connected,” “coupled,” and “mounted” and variations thereof herein are used broadly and encompass direct and indirect connections, couplings, and mountings. Similarly, the terms “facing,” “faces” and variations thereof herein are used broadly and encompass direct and indirect facing, and “adjacent to” and variations thereof herein are used broadly and encompass directly and indirectly “adjacent to”. Therefore, the description of “A” component facing “B” component herein may contain the situations that “A” component directly faces “B” component or one or more additional components are between “A” component and “B” component. Also, the description of “A” component “adjacent to” “B” component herein may contain the situations that “A” component is directly “adjacent to” “B” component or one or more additional components are between “A” component and “B” component. Accordingly, the drawings and descriptions will be regarded as illustrative in nature and not as restrictive.
Referring to
According to the above embodiment, the touch-sensitive element 14 is adhered to a surface of the liquid crystal display module 12, so the touch-sensitive element 14 and the liquid crystal display module 12 are combined with each other as a single piece. Further, the touch-sensitive element 14 and the liquid crystal display module 12 that are combined with each other as a single piece are directly attached to a back frame 28 by a fastener such as a tape 23 or a front bezel 25. Therefore, assembly processes of the touch-sensitive display device are simplified, and assembly hours, packing and transportation costs, the possibility of damage to materials, and the overall thickness of a finished product are all reduced. Besides, since the touch-sensitive element 14 and the liquid crystal display module 12 are integrated as one piece, the buffer material used in a conventional design is no longer needed to further reduce fabrication costs, and possible electrostatic adhesion between the touch-sensitive element 14 and the liquid crystal display module 12 is also avoided. Similarly, the touch-sensitive element 14 is not liable to bend due to gravity to avoid the formation of Newton's rings and thus improve display quality.
Referring to
Referring to
The embodiment or the embodiments of the invention may have at least one of the following advantages. According to the above embodiments, the touch-sensitive element is adhered to a surface of the liquid crystal display module, so the touch-sensitive element and the liquid crystal display module are combined with each other as a single piece. Further, the touch-sensitive element and the liquid crystal display module that are combined with each other as a single piece are directly attached to a back frame by a fastener. Therefore, assembly processes of the touch-sensitive display device are simplified, and assembly hours, packing and transportation costs, the possibility of damage to materials, and the overall thickness of a finished product are all reduced. Besides, since the touch-sensitive element and the liquid crystal display module are integrated as one piece, the buffer material used in a conventional design is no longer needed to further reduce fabrication costs, and possible electrostatic adhesion between the touch-sensitive element and the liquid crystal display module is also avoided. Similarly, the touch-sensitive element is not liable to bend due to gravity to avoid the formation of Newton's rings and thus improve display quality. In addition, the touch-sensitive element may be stacked with optical films to together form a film set to therefore lower production defective rate and material costs for adhesion. Besides, a touch-sensitive circuitry layer may be directly printed on at least one of a liquid crystal panel, a light guide plate and an optical film set to further reduce fabrication costs and the overall thickness of a finished product.
The foregoing description of the preferred embodiments of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form or to exemplary embodiments disclosed. Accordingly, the foregoing description should be regarded as illustrative rather than restrictive. Obviously, many modifications and variations will be apparent to practitioners skilled in this art. The embodiments are chosen and described in order to best explain the principles of the invention and its best mode practical application, thereby to enable persons skilled in the art to understand the invention for various embodiments and with various modifications as are suited to the particular use or implementation contemplated. It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents in which all terms are meant in their broadest reasonable sense unless otherwise indicated. Therefore, the term “the invention”, “the present invention” or the like does not necessarily limit the claim scope to a specific embodiment, and the reference to particularly preferred exemplary embodiments of the invention does not imply a limitation on the invention, and no such limitation is to be inferred. The invention is limited only by the spirit and scope of the appended claims. Moreover, these claims may refer to use “first”, “second”, etc. following with noun or element. Such terms should be understood as a nomenclature and should not be construed as giving the limitation on the number of the elements modified by such nomenclature unless specific number has been given. The abstract of the disclosure is provided to comply with the rules requiring an abstract, which will allow a searcher to quickly ascertain the subject matter of the technical disclosure of any patent issued from this disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. Any advantages and benefits described may not apply to all embodiments of the invention. It should be appreciated that variations may be made in the embodiments described by persons skilled in the art without departing from the scope of the present invention as defined by the following claims. Moreover, no element and component in the present disclosure is intended to be dedicated to the public regardless of whether the element or component is explicitly recited in the following claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201010621992.1 | Dec 2010 | CN | national |
