JP2010015094A - Display device and portable equipment assembling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique permitting a narrow frame formation in a display device. <P>SOLUTION: The display device comprises: a display panel and a front panel arranged on the surface of the observer side of the display panel, wherein the front panel has a convex lens function and is formed with dimensions covering the whole display region of the display panel. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device and a portable device in which the display device is incorporated, and more particularly to a narrow frame of the display device.

  A liquid crystal display device is known as one of display devices. In this liquid crystal display device, a front panel is fixed to a polarizing plate on the viewer side of the liquid crystal display panel through an adhesive having a refractive index equivalent to that of the polarizing plate (hereinafter referred to as a hybrid panel structure). Things are known. Compared with the structure in which the front panel is disposed on the polarizing plate on the viewer side of the liquid crystal display panel via the gap layer, this hybrid panel structure is (1) dust-free (contamination of foreign matter is less), ( 2) Thinning, (3) Good outdoor visibility, and (4) High luminance rate.

In a liquid crystal display device used as a display unit of a mobile device such as a mobile phone, a frame is required (maximum screen size within the same external dimensions). On the other hand, the hybrid panel structure has been widespread in the past few years, and is in a state of being widely applied to portable liquid crystal display devices. Therefore, the present inventor made the present invention paying attention to the front panel.
An object of the present invention is to provide a technique capable of achieving a framed display device.
The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows.
(1) A display device including a display panel and a front panel disposed on a viewer-side surface of the display panel, the front panel having a convex lens function and a display area of the display panel It is formed in a size that covers the whole.
(2) In the above (1), the display panel is a liquid crystal display panel having a polarizing plate on the surface on the viewer side, and the front panel is fixed to the polarizing plate via an adhesive.
(3) In the above (1), the front panel is formed in a square shape having a plane having four sides, and each of the four sides has a curved shape in which an intermediate portion protrudes.
(4) In the above (1), the peripheral edge of the front panel has a round cross-sectional shape along the thickness direction.

(5) a first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrates, and an observer side of the second substrate opposite to the liquid crystal layer; A display device comprising a liquid crystal display panel having a polarizing plate provided on a surface, and a front panel fixed to the polarizing plate via an adhesive,
The liquid crystal display panel has a display area in which a plurality of pixels are arranged, and a non-display area arranged around the display unit, the front panel has a convex lens function, and the display of the display panel Formed to cover the entire area,
When the liquid crystal display panel is viewed from the front panel side, the non-display area of the liquid crystal display panel cannot be seen.
(6) In the above (5), the non-display area of the display panel has a light shielding film.
(7) In the above (5), the front panel enlarges and displays the display area of the liquid crystal display panel to the periphery of the front panel.

(8) A portable device including a liquid crystal display module and a housing,
The liquid crystal display module includes a first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrates, and an observation of the second substrate opposite to the liquid crystal layer. A liquid crystal display panel having a polarizing plate provided on the surface of the person, and a front panel fixed to the polarizing plate via an adhesive,
The liquid crystal display panel is formed in a rectangular planar shape having a long side and a short side,
The liquid crystal display panel includes a display area in which a plurality of pixels are arranged, and a non-display area in which a light shielding film is formed around the display unit,
The front panel has a convex lens function and is formed with a size that covers the entire display area of the display panel,
The housing has an opening for storing the front panel,
In the direction along the short side of the liquid crystal display panel, the front panel enlarges and displays the display area of the liquid crystal display panel to the periphery of the front panel,
The front panel has a colored layer of the same color as the housing on the periphery of the polarizing plate side surface of the front panel in the direction along the long side of the liquid crystal display panel,
When the liquid crystal display panel is viewed from the front panel side, the light shielding film is covered with the colored layer and the casing on the short side of the front panel.

(9) A portable device including a liquid crystal display module and a housing,
The liquid crystal display module includes a first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrates, and an observation of the second substrate opposite to the liquid crystal layer. A liquid crystal display panel having a polarizing plate provided on the surface of the person, and a front panel fixed to the polarizing plate via an adhesive,
The liquid crystal display panel is formed in a rectangular planar shape having a long side and a short side,
The liquid crystal display panel includes a display area in which a plurality of pixels are arranged, and a non-display area in which a light shielding film is formed around the display unit,
The front panel has a convex lens function and is formed with a size that covers the entire display area of the display panel,
The housing has an opening for storing the front panel,
In the direction along the short side of the liquid crystal display panel, the front panel enlarges and displays the display area of the liquid crystal display panel to the periphery of the front panel,
When the liquid crystal display panel is viewed from the front panel side, the light shielding film is covered with the casing on the short side of the liquid crystal display panel.

The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows.
According to the present invention, it is possible to achieve a framed display device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In all the drawings for explaining the embodiments of the invention, those having the same function are given the same reference numerals, and their repeated explanation is omitted.
[Example 1]
In the first embodiment, an example in which the present invention is applied to, for example, a liquid crystal display module (liquid crystal display device) will be described as an example of a display device.
1 to 3 are diagrams related to a liquid crystal display module according to Embodiment 1 of the present invention.
FIG. 1 is a perspective view showing a schematic configuration of a liquid crystal display module;
FIG. 2 is a plan view showing a schematic configuration of the liquid crystal display module;
FIG. 3 is a cross-sectional view showing a cross-sectional structure along the line AA ′ of FIG.
The liquid crystal display module 41 according to the first embodiment is a TFT (Thin Film Transistor) type liquid crystal display module having a small liquid crystal display panel having a pixel number of about 240 × 320 × 3 for color display. Widely used as a display unit for portable devices.

As shown in FIGS. 1 to 3, the liquid crystal display module 41 according to the first embodiment includes a liquid crystal display panel 10, a front panel 30 disposed on a viewer-side surface of the liquid crystal display panel 10, and a liquid crystal display panel. 10 is provided with a backlight 20 disposed below the surface opposite to the viewer side.
The liquid crystal display panel 10 includes a first substrate 11, a second substrate 12, a liquid crystal layer (not shown) sandwiched between the first substrate 11 and the second substrate 12, and a drive circuit. A mounted semiconductor chip 14, a flexible wiring substrate 15 connected to at least one side of the first substrate 11, and a polarizing plate 18 attached to the surface of the second substrate 12 opposite to the liquid crystal layer. Have. The side opposite to the liquid crystal layer of the second substrate 12 is the observer side.
Further, the liquid crystal display panel 10 includes a display area a in which a plurality of pixels are arranged in a matrix and a non-display area b arranged around the display area a. Each of the plurality of pixels has a pixel electrode and a counter electrode. In the non-display area b, a light shielding film 13 such as a black matrix is provided.
As the first and second substrates (11, 12), for example, transparent insulating substrates such as glass are used. As the liquid crystal layer, positive type liquid crystal or negative type liquid crystal is used.
Each of the first and second substrates (11, 12) is formed in, for example, a rectangular planar shape having a long side and a short side. Of the first and second substrates (11, 12), the long side of the first substrate 11 is longer than the long side of the second substrate 12, and the first substrate 11 does not overlap the second substrate 12. It has a configuration having a region (hereinafter referred to as a non-overlapping region). The semiconductor chip 14 is mounted in a non-overlapping region on the surface of the first substrate 11 on the liquid crystal layer side.
A thin film transistor, a pixel electrode, a counter electrode, and the like are formed on the first substrate 11, and a color filter and the like are formed on the second substrate 2. Here, since the liquid crystal display panel 10 of this embodiment is an IPS liquid crystal display panel, the counter electrode is provided on the first substrate 11 side, but in the case of a TN liquid crystal display panel or a VA liquid crystal display panel, the counter electrode is provided. The electrode is provided on the second substrate 12 side.

The front panel 30 is bonded and fixed to the polarizing plate 18 on the second substrate 12 side of the liquid crystal display panel 10 through an adhesive 19 having a refractive index equivalent to that of the polarizing plate 18.
The front panel 30 has a convex lens function for enlarging and displaying the display area a of the liquid crystal display panel 10 when the display area a of the liquid crystal display panel 10 is viewed from the front panel 30 side. It is formed in a size that covers the entire 10 display areas a.
Further, the front panel 30 is formed in a square shape having four sides 30 a when the front panel 30 is viewed from the observer side, and is formed in the same planar shape as the liquid crystal display panel 10. Since the liquid crystal display panel 10 of this embodiment is formed in a rectangular planar shape, the front panel 30 is also formed in a rectangular planar shape having long sides and short sides. The front panel 30 is made of a transparent insulating material such as glass or resin.
In FIG. 1 to FIG. 3, the symbol A is a pixel region obtained by enlarging the pixel region a of the liquid crystal display panel 10 by the convex lens function of the front panel 30.
In the liquid crystal display module 41 of the first embodiment, as described above, the front panel 30 is attached to the polarizing plate 18 on the viewer side of the liquid crystal display panel 10 via the adhesive 19 having the same refractive index as that of the polarizing plate 18. It has a fixed structure, that is, a hybrid panel structure. The front panel 30 has a convex lens function and is formed with a size that covers the entire display area a of the display panel 10. With such a configuration, the display area a of the liquid crystal display panel 10 can be enlarged and displayed on the front panel, in other words, the screen size can be enlarged within the same outer dimensions. Can be achieved.
In this embodiment, as shown in FIG. 3, the display area a of the liquid crystal display panel 10 is not expanded to the periphery of the front panel 30, but the display area a of the liquid crystal display panel 10 is extended to the periphery of the front panel 30. You may make it expand.

[Example 2]
4 to 6 are diagrams related to the liquid crystal display module according to the second embodiment of the present invention.
FIG. 4 is a perspective view showing a schematic configuration of the liquid crystal display module;
FIG. 5 is a plan view showing a schematic configuration of the liquid crystal display module;
FIG. 6 is a cross-sectional view showing a cross-sectional structure along the line BB ′ in FIG.
The liquid crystal display module 42 of the second embodiment basically has the same configuration as that of the first embodiment, and the following points are different.
That is, in the above-described first embodiment, each of the four sides 30a constituting the planar shape when the front panel 30 is viewed from the observer side (which becomes the outline of the outer edge) is a straight line as shown in FIG. It is in the shape. On the other hand, in the present Example 2, each of the four sides 30a constituting the planar shape when the front panel 30 is viewed from the observer side has each intermediate portion as shown in FIG. It has a curved shape protruding outward from both ends.
Further, in the first embodiment described above, the peripheral edge of the front panel 30 is bent in cross-sectional shape along the thickness direction as shown in FIG. On the other hand, in the second embodiment, the peripheral edge of the front panel 30 has a round cross-sectional shape along the thickness direction as shown in FIG.
When the planar shape of the front panel 30 is a quadrangle, the enlarged screen looks distorted at the periphery, so that each of the four sides 30a constituting the planar shape of the front panel 30 is curved as in the second embodiment. By doing so, you can reduce the sense of incongruity. Moreover, the same effect can be acquired also by giving roundness to the cross-sectional shape along the thickness direction of the periphery of the front panel 30. FIG.

[Example 3]
FIG. 7 is a cross-sectional view showing a cross-sectional structure of a liquid crystal display module according to Embodiment 3 of the present invention.
The liquid crystal display module 43 of the third embodiment basically has the same configuration as that of the first embodiment described above, and differs in the following points.
That is, in the above-described first embodiment, the front panel 30 is constituted by a single member having a convex lens function as shown in FIG. On the other hand, in the third embodiment, as shown in FIG. 7, a lens member 31 having a convex lens function and a flat plate member 32 arranged on the member 31 are combined.
In the third embodiment, the same effect as that of the first embodiment can be obtained.

[Example 4]
In general, since the display area a of the liquid crystal display panel 10 is surrounded by a non-display area b having a light shielding film 13, the periphery of the display area a is black when the liquid crystal display panel 10 is viewed from the observer side. Although the screen is trimmed, the non-display area b may be enlarged as the display area a is enlarged. Thus, in the fourth embodiment, the display area a of the liquid crystal display panel 10 is enlarged by the front panel 30 having a convex lens function, and the screen display of the non-display area b that borders the display area a in black is suppressed. It is a thing.
8 to 10 are diagrams related to a portable device according to the fourth embodiment of the present invention.
FIG. 8 is a plan view showing a display unit of a portable device,
FIG. 9 is a cross-sectional view showing a cross-sectional structure along the line CC ′ of FIG.
FIG. 10 is a cross-sectional view showing a cross-sectional structure along the line DD ′ in FIG.
The mobile device of the fourth embodiment includes a housing 50 and a liquid crystal display module 44 as shown in FIGS. 8 to 10 in the display unit. The housing 50 accommodates the front panel 30 of the liquid crystal display module 44 inside, and includes an opening 51 whose opening end is located outside the periphery of the front panel 30.
The liquid crystal display module 44 of the fourth embodiment basically has the same configuration as that of the first embodiment described above, and differs in the following points.
That is, as shown in FIG. 9, the front panel 30 is arranged on the long side (side along the first direction) of the front panel 30, in other words, in the direction along the short side of the front panel 30. The display area a of the liquid crystal display panel 10 is enlarged and displayed (display area a <display area A).
Further, as shown in FIG. 10, the front panel 30 is arranged on the short side of the front panel 30 (the side along the second direction intersecting the first direction), in other words, on the long side of the front panel 30. In the extending direction, a colored layer 33 having the same color as the housing 50 is provided on the periphery of the surface on the polarizing plate 18 side.
Further, when the liquid crystal display panel 10 is viewed from the front panel 30 side, the light shielding film 13 in the non-display area b of the liquid crystal display panel 10 is formed on the short side of the front panel 30 with the colored layer 33 of the front panel 30 and the housing. And 50.
With such a configuration, the display area a of the liquid crystal display panel 10 is enlarged and displayed on the long side of the front panel 30 up to the periphery of the front panel 30, so that the non-display is performed on the long side of the front panel 30. The area is not displayed on the screen.
Further, on the short side of the front panel 30, the light shielding film 13 in the display area “a” of the liquid crystal display panel 10 is configured by the same color as the casing 50 and the colored layer provided on the front panel 30. 33, the non-display area is not displayed on the screen even on the short side of the front panel 30.
Accordingly, the display area a of the liquid crystal display panel 10 can be enlarged by the front panel 30 having the convex lens function, and the screen display of the non-display area b that borders the periphery of the display area a can be suppressed.
[Example 5]
FIG. 11 is a sectional view showing a sectional structure of a liquid crystal display module which is Embodiment 5 of the present invention. FIG. 11 corresponds to FIG. 10 of the fifth embodiment described above.
The portable device of the fifth embodiment basically has the same configuration as that of the fourth embodiment described above, and differs in the following points.
That is, the front panel 30 expands the display area a of the liquid crystal display panel 10 to the periphery of the front panel 30 in the direction along the short side of the front panel 30 as shown in FIG. However, when the liquid crystal display panel 10 is viewed from the front panel 30 side, the light shielding film 13 is covered with a housing 50 on the short side of the front panel 30 as shown in FIG.
With such a configuration, the display area a of the liquid crystal display panel 10 is enlarged and displayed on the long side of the front panel 30 up to the periphery of the front panel 30, so that it is not displayed on the long side of the front panel 30. The area is not displayed on the screen.
Further, on the short side of the front panel 30, the light shielding film 13 in the display area a of the liquid crystal display panel 10 is covered with the casing 50, so that the non-display area is not displayed on the screen on the short side of the front panel 30. .
Therefore, also in the fifth embodiment, the display area a of the liquid crystal display panel 10 is enlarged by the front panel 30 having a convex lens function, and the screen display of the non-display area b that borders the display area a in black is suppressed. Can do.
In the above-described embodiments, the liquid crystal display module including the liquid crystal display panel and the portable device incorporating the liquid crystal display panel are described as an example of the display panel. However, the present invention is not limited to this, and the organic EL display is not limited thereto. The present invention can be applied to a display module including another display panel such as a panel or an inorganic EL display panel, and a portable device incorporating the display module.
As mentioned above, the invention made by the present inventor has been specifically described based on the above embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Of course.

It is a perspective view which shows schematic structure of the liquid crystal display module of Example 1 of this invention. It is a top view which shows schematic structure of the liquid crystal display module of Example 1 of this invention. FIG. 2 is a cross-sectional view showing a cross-sectional structure along the line A-A ′ of FIG. 1. It is a perspective view which shows schematic structure of the liquid crystal display module of Example 2 of this invention. It is a top view which shows schematic structure of the liquid crystal display module of Example 2 of this invention. FIG. 5 is a cross-sectional view showing a cross-sectional structure along the line B-B ′ of FIG. 4. It is sectional drawing which shows the cross-section of the liquid crystal display module which is Example 3 of this invention. It is a top view which shows the display part of the portable apparatus of Example 4 of this invention. FIG. 9 is a cross-sectional view showing a cross-sectional structure taken along line C-C ′ of FIG. 8. It is sectional drawing which shows the cross-section along a D-D 'line of FIG. It is sectional drawing which shows the cross-section of the liquid crystal display module which is Example 4 of this invention.

Explanation of symbols

a, A Display area b Non-display area 10 Liquid crystal display panel 11, 12 Substrate 13 Light shielding film 14 Semiconductor chip 15 Flexible wiring substrate 18 Polarizing plate 19 Adhesive 20 Backlight 30 Front panel 31 Lens member 32 Flat plate member 33 Colored layer 41, 42, 43, 44 Liquid crystal display module 50 Case 51 Opening

Claims (9)

A display panel, and a front panel disposed on a viewer-side surface of the display panel,
The display device according to claim 1, wherein the front panel has a convex lens function and has a size covering the entire display area of the display panel. The display panel is a liquid crystal display panel having a polarizing plate on its observer side,
The display device according to claim 1, wherein the front panel is fixed to the polarizing plate via an adhesive. The front panel is formed in a rectangular shape having a plane having four sides,
The display device according to claim 1, wherein each of the four sides has a curved shape in which an intermediate portion of each of the four sides protrudes.   The display device according to claim 1, wherein the peripheral edge of the front panel has a rounded cross-sectional shape along the thickness direction. A first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrates, and a viewer side surface of the second substrate opposite to the liquid crystal layer; A liquid crystal display panel having a polarizing plate,
A front panel fixed to the polarizing plate via an adhesive,
The liquid crystal display panel has a display area in which a plurality of pixels are arranged, and a non-display area arranged around the display unit,
The front panel has a convex lens function and is formed with a size that covers the entire display area of the display panel,
The display device, wherein the non-display area of the liquid crystal display panel is not visible when the liquid crystal display panel is viewed from the front panel side.   The display device according to claim 5, wherein the non-display area of the display panel includes a light shielding film.   6. The display device according to claim 5, wherein the front panel enlarges and displays the display area of the liquid crystal display panel to the periphery of the front panel. A portable device comprising a liquid crystal display module and a housing,
The liquid crystal display module is
A first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrates, and a viewer side surface of the second substrate opposite to the liquid crystal layer; A liquid crystal display panel having a polarizing plate,
A front panel fixed to the polarizing plate via an adhesive,
The liquid crystal display panel and the front panel are formed in a rectangular planar shape having a long side and a short side,
The liquid crystal display panel includes a display area in which a plurality of pixels are arranged, and a non-display area in which a light shielding film is formed around the display unit,
The front panel has a convex lens function and is formed with a size that covers the entire display area of the display panel,
The housing has an opening for storing the front panel,
The front panel enlarges and displays the display area of the liquid crystal display panel to the periphery of the front panel on the long side of the front panel,
The front panel has, on the short side of the front panel, a colored layer of the same color as the casing on the periphery of the polarizing plate side surface of the front panel,
When the liquid crystal display panel is viewed from the front panel side, the light shielding film is covered with the colored layer and the casing on the short side of the front panel. A portable device comprising a liquid crystal display module and a housing,
The liquid crystal display module is
A first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrates, and a viewer side surface of the second substrate opposite to the liquid crystal layer; A liquid crystal display panel having a polarizing plate,
A front panel fixed to the polarizing plate via an adhesive,
The liquid crystal display panel and the front panel are formed in a rectangular planar shape having a long side and a short side,
The liquid crystal display panel includes a display area in which a plurality of pixels are arranged, and a non-display area in which a light shielding film is formed around the display unit,
The front panel has a convex lens function and is formed with a size that covers the entire display area of the display panel,
The housing has an opening for storing the front panel,
The front panel enlarges and displays the display area of the liquid crystal display panel to the periphery of the front panel on the long side of the front panel,
When the liquid crystal display panel is viewed from the front panel side, the light shielding film is covered with the casing on the short side of the front panel.

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