JP3708698B2 - Liquid crystal display device with input device and electronic device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid crystal display device with an input device and an electronic apparatus.
[0002]
[Background Art and Problems to be Solved by the Invention]
In a liquid crystal display device with an input device having a liquid crystal display panel in which liquid crystal is sealed between two substrates and an input device provided on the display screen side of the liquid crystal display panel, a sheet-like member has been conventionally used. It is known that a fixed icon is displayed in a part of a display area using an icon sheet on which an icon is printed. In this case, the icon sheet is disposed between the liquid crystal display panel and the input device.
[0003]
By the way, a pair of polarizing plates is usually attached to the liquid crystal display panel so as to sandwich the liquid crystal display panel. In a liquid crystal display device with an input device, a polarizing plate on the display screen side of the pair of polarizing plates may be disposed on the input device for the purpose of suppressing reflection of external light on the display screen. .
[0004]
However, when an icon sheet is used and a polarizing plate is mounted on the input device, the printed icon looks dark and the icon display portion does not look good.
[0005]
The present invention has been made in view of the above problems, and an object thereof is to provide a liquid crystal display device with an input device and an electronic apparatus capable of displaying icons with good appearance.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention described in claim 1 includes a transparent input device, a liquid crystal display panel disposed on the back side of the transparent input device so as to overlap an input region of the transparent input device,
A fixed display sheet that is bonded and fixed to the input side surface of the transparent input device so as to overlap a part of the input area of the transparent input device and a part of the liquid crystal display panel; And the polarizing plate overlaps with other parts of the input area of the transparent input device so as to avoid a part of the input area of the transparent input device to which the fixed display sheet is bonded and fixed, It overlaps with the display area of the liquid crystal display panel, and is bonded and fixed to the input side surface of the transparent input device together with the fixed display sheet.
[0007]
According to the present invention, since the polarizing plate is attached to avoid the upper area of the fixed display portion, the display provided on the fixed display portion looks bright and clear. For this reason, the appearance of the fixed display portion on which the fixed display is performed is improved, and the liquid crystal display device with an input device having a good overall appearance can be obtained.
[0008]
Furthermore, since the polarizing plate is attached to the input side surface of the input device, it is possible to realize an easy-to-see liquid crystal display with less external light reflection on the input side surface.
[0009]
According to a second aspect of the present invention, in the liquid crystal display device with an input device according to the first aspect, the fixed display sheet is bonded and fixed to the input-side surface of the transparent input device, and is substantially as thin as the polarizing plate. It is characterized by having.
[0010]
The fixed display unit is made of a flexible thin material on which a display is printed, and is arranged on the surface side of the transparent input device.
[0011]
According to a third aspect of the present invention, in the liquid crystal display device with an input device according to the second aspect, the fixed display sheet is made of a flexible thin material on which a display is printed, and is provided on the input side of the transparent input device. It is characterized by being bonded and fixed to the surface.
[0013]
The electronic apparatus according to the present invention includes any one of the above-described liquid crystal display devices with an input device.
[0014]
According to the present invention, since the liquid crystal display device with an input device having a good appearance is provided, an electronic apparatus having a fixed display portion having a good appearance can be easily obtained.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Next, preferred embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 2 is a front view showing an example of an electronic apparatus according to the present invention.
[0017]
In the figure, the electronic device is an electronic notebook 50, and a display screen 54 is formed on one surface of a main body 52 having a thin rectangular parallelepiped shape. The display screen 54 is divided into a fixed display area 12 in which icons are fixedly displayed by print display, and a liquid crystal display area 14 in which various displays can be performed by liquid crystal display. Further, in any of the areas 12 and 14 on the display screen 54, it is possible to input by directly touching the screen.
[0018]
Here, a schematic cross-sectional view of a liquid crystal display device with an input device forming the display screen 54 is shown in FIG.
[0019]
In the figure, the liquid crystal display device with an input device 10 has a fixed display portion 40 so as to cover a part of one surface 20a of the liquid crystal display panel 20, and is transparent so as to face the surface 20a and the fixed display portion 40. An input device 30 is disposed, a first polarizing plate 42 is attached to an input side surface 30a of the input device 30, and a second polarizing plate 44 and a reflecting plate are provided on the other surface 20b of the liquid crystal display panel 20. 46 is formed in a layered manner.
[0020]
More specifically, the liquid crystal display panel 20 is formed by sealing a liquid crystal 28 with a sealing material 26 between a transparent upper substrate 22 and a lower substrate 24. Here, the upper substrate 22 and the lower substrate 24 are made of glass, hard plastic or the like, and a transparent electrode (not shown) made of ITO (Indium Tin Oxide) or the like is disposed on the surface facing the liquid crystal 28. In addition, a transparent spacer (not shown) is provided between the upper substrate 22 and the lower substrate 24 to maintain a constant distance between the two substrates 22 and 24. As the liquid crystal 28, STN liquid crystal is used. As the liquid crystal 28, in addition to the STN type, for example, a liquid crystal having various electro-optical characteristics such as a TN type, a guest host type, a polymer dispersion type, a phase transition type, and a ferroelectric type may be used.
[0021]
The fixed display unit 40 is formed of an icon sheet on which a predetermined icon is printed in advance on one surface of a thin material, and is formed to have a size that covers a part of the surface 20 a formed of the upper substrate 22 of the liquid crystal display panel 20. The material and properties of the icon sheet are not particularly limited and may be hard or flexible. Further, the number and form of icons to be printed can be arbitrarily determined as necessary. Then, the surface on which the icon is printed is adhered and fixed on the surface 20a with the surface facing the input device 30.
[0022]
The input device 30 is formed such that a transparent first substrate 32 and a second substrate 34 facing each other are fixed at a predetermined interval via a sealing material 36 and a transparent spacer (not shown). Here, the first substrate 32 is made of a flexible thin material such as a plastic film, and the second substrate 34 is formed of a hard material such as hard plastic or glass.
[0023]
A transparent electrode (not shown) made of ITO (Indium Tin Oxide) or the like is disposed on the surfaces of the first substrate 32 and the second substrate 34 facing each other. The transparent electrodes attached to the substrates 32 and 34 are not in contact with each other normally by the dot spacers.
[0024]
Silicone oil or the like may be sealed between the substrates 32 and 34.
[0025]
The first polarizing plate 42 has flexibility and is smaller than the input-side surface 30 a of the input device 30. Then, it is bonded and fixed to the input side surface 30a while avoiding the upper region of the fixed display section 40. For other points, a known configuration is adopted. The region covered with the polarizing plate 42 corresponds to the liquid crystal display region 14, and the upper region of the fixed display unit 40 corresponds to the fixed display region 12.
[0026]
Since the configuration and usage of the second polarizing plate 44 and the reflecting plate 46 are well known, detailed description thereof is omitted here.
[0027]
By having such a configuration, it is possible to obtain the liquid crystal display device 10 with an input device and the electronic notebook 50 that have good appearance and easy-to-see icons of printed icons.
[0028]
That is, since the first polarizing plate 42 is not provided in the upper region of the fixed display unit 40, the fixed display unit 40 looks bright and clear through the input device 30, and the appearance is improved.
[0029]
Further, since the first polarizing plate 42 is attached to the input-side surface 30a of the input device 30, external light reflection on the input-side surface 30a is reduced, and the liquid crystal display is easy to see.
[0030]
Further, since the icon sheet is used, the fixed display portion can be easily formed at an arbitrary position, and the liquid crystal display device with an input device 10 having the fixed display portion can be easily manufactured.
[0031]
Next, FIG. 3 is a schematic cross-sectional view showing an embodiment of a liquid crystal display device with an input device according to the present invention.
[0032]
In the figure, a liquid crystal display device with an input device 60 has substantially the same configuration as the liquid crystal display device with an input device 10 shown in FIG. Therefore, the same components as those in the liquid crystal display device 10 with an input device are denoted by the same reference numerals as those in FIG.
[0033]
Specifically, in the liquid crystal display device 60 with an input device, the input device 30 is disposed facing the one surface 20a of the liquid crystal display panel 20 with a space therebetween, and the input device 30 has an upper surface 30a. In addition, the first polarizing plate 42 and the fixed display portion 66 are formed side by side. In addition, the second polarizing plate 44 and the reflection plate 46 are arranged in layers so as to face the other surface 20 b of the liquid crystal display panel 20.
[0034]
Here, the fixed display portion 66 is an icon sheet, and is formed using a flexible thin material such as a plastic film. The size is set smaller than the surface 30a on the input side and the surface 20a of the liquid crystal display panel 20, and is a region avoided by the first polarizing plate 42 on the surface 30a on the input side so as to cover a part of the surface 20a. Adhered and fixed to. Further, the thickness of the icon sheet is set to be approximately equal to the thickness of the first polarizing plate 42 provided therewith.
[0035]
Even with such a configuration, it is possible to achieve the same operations and effects as those of the liquid crystal display device with an input device 10 described above.
[0036]
In particular, in the case of the present embodiment, since there is nothing that blocks the upper area of the fixed display portion 66, the printed icon appears more clearly. In addition, the fixed display portion 66 is provided by using the area avoided by the polarizing plate 42, and the fixed display portion 66 and the first polarizing plate 42 are almost the same thickness, so that the boundary between them is inconspicuous.
[0037]
In addition, since the icon sheet forming the fixed display portion 66 is flexible, even if it is provided on the input side surface 30a of the input device 30, input is not hindered.
[0038]
In addition, embodiment of this invention is not limited to the above-mentioned example, A various deformation | transformation is possible within the scope of the invention.
[0039]
For example, icons, simple characters, decorations, and other displays can be directly printed on the surface of either the upper substrate of the liquid crystal display panel or the two substrates of the input device to form the fixed display portion.
[0040]
Further, a fixed display portion may be provided so as to overlap with a polarizing plate attached to the input side surface of the input device.
[0041]
Alternatively, in each embodiment shown in FIGS. 1 and 3, instead of the second polarizing plate 44, a reflective polarizer that reflects light of a predetermined frequency among received light and transmits light of other frequencies is used. You can also In this case, since the reflection plate can be omitted, a thinner liquid crystal display device with an input device can be obtained.
[0042]
Furthermore, examples of the electronic apparatus according to the present invention include a word processor, a personal computer, a portable information terminal, and the like in addition to the electronic notebook described above.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing a liquid crystal display device with an input device according to the present invention.
FIG. 2 is a front view showing an example of an electronic apparatus according to the invention.
FIG. 3 is a schematic cross-sectional view showing an embodiment of a liquid crystal display device with an input device according to the present invention.

Claims (4)

A transparent input device;
A liquid crystal display panel disposed on the back side of the transparent input device so as to overlap an input area of the transparent input device;
A fixed display sheet that is bonded and fixed to the input-side surface of the transparent input device so as to overlap a part of the input area of the transparent input device and a part of the liquid crystal display panel; and
A polarizing plate, and the polarizing plate overlaps with another part of the input region of the transparent input device so as to avoid a part of the input region of the transparent input device to which the fixed display sheet is bonded and fixed, A liquid crystal display device with an input device, wherein the liquid crystal display device has an input device, and overlaps with a display area of the liquid crystal display panel and is bonded and fixed to the input side surface of the transparent input device in parallel with the fixed display sheet. The liquid crystal display device with an input device according to claim 1, wherein the fixed display sheet is adhesively fixed to an input side surface of the transparent input device and has a thickness substantially equal to that of the polarizing plate.   The input device according to claim 1, wherein the fixed display sheet is made of a flexible thin material on which a display is printed, and is adhesively fixed to an input side surface of the transparent input device. Liquid crystal display device.   An electronic apparatus comprising the liquid crystal display device with an input device according to claim 1.

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