JP2010145865A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device, wherein a panel is positioned and supported with a high precision while preventing breakage of the panel, without increasing the member cost and the manufacturing cost. <P>SOLUTION: The display device is provided with: a display panel 11 and a frame 12 supporting the display panel 11, wherein the frame 12 has: an outer peripheral wall portion 12a which is abutted on the outer peripheral surface of the supported display panel 11 and has an inner lower end located below a bottom surface of the display panel 11; a bottom surface support portion 12b which is formed on the bottom surface side of the supported display panel 11 and is abutted on the bottom surface; and a step portion 12c which is formed between the bottom surface support portion 12b and the inner lower end of the outer peripheral wall portion 12a and is recessed below the bottom surface support portion 12b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device having a liquid crystal display panel or the like.

  Liquid crystal display devices for displaying images are widely used as displays for mobile phones, PDAs, mobile type PCs (personal computers), ATMs (automated teller machines), portable music players, car navigation devices, and the like. In addition, a liquid crystal display device equipped with a touch panel is also used. In these liquid crystal display devices, a liquid crystal display panel and a touch panel are usually installed, positioned and supported in a frame that functions as a case. The frame has an outer peripheral wall portion for positioning the panel by contacting the outer peripheral surface of a liquid crystal display panel or a touch panel panel.

  However, as shown in FIG. 5, when the outer peripheral wall portion 2a is formed, the base portion (inner lower end) of the outer peripheral wall portion 2a has a bend R. When positioning by bringing the surface into contact with the inner surface of the outer peripheral wall portion 2a, the edge portion 1a at the lower end of the outer peripheral surface of the panel 1 interferes with the bent R portion, and in the assembled state, the position of the panel 1 is shifted. There was an inconvenience. Further, if the edge portion 1a of the panel 1 is forcibly pressed against the bent R portion and positioned, the edge portion 1a of the panel 1 may be damaged.

  Conventionally, for example, Patent Document 1 proposes a display unit fixing structure that attaches and fixes a display unit to a unit mounting member via a cushioning material. In this structure, a cushioning material having a curved concave shape is formed of a resilient material such as rubber or elastomer, and this is installed at the corners of the four corners of the unit mounting member so that the corners of the display unit are cushioned. The display unit is supported in a contracted state by pressing.

JP 2004-258461 A (Claims, FIG. 1)

However, the following problems remain in the conventional technology.
In other words, the technique disclosed in Patent Document 1 supports a panel such as a display unit via a curved concave buffer material, which makes it difficult to position with high accuracy due to shrinkage of the buffer material. It was. In addition, since the edge portion of the panel of the display unit or the like is positioned in direct contact with the cushioning material, the edge portion may also be damaged. Furthermore, it is necessary to separately prepare and install the buffer material, which increases the member cost and the manufacturing process.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a display device capable of positioning and supporting a panel with high accuracy and preventing damage without increasing the member cost and the manufacturing process. And

  The present invention employs the following configuration in order to solve the above problems. That is, the display device of the present invention includes a display panel and a frame that supports the display panel or a touch panel installed above the display panel, and the frame supports the display panel or the outer periphery of the touch panel. An outer peripheral wall portion that is in contact with the surface and whose inner lower end is disposed below the lower surface of the display panel or the touch panel, and a lower surface support portion that is formed on the lower surface side of the supporting display panel or the touch panel and is in contact with the lower surface And a step portion formed between the lower surface support portion and an inner lower end of the outer peripheral wall portion and recessed below the lower surface support portion.

  In this display device, the frame has a step portion formed between the lower surface support portion and the inner lower end of the outer peripheral wall portion and recessed below the lower surface support portion. The edge portion of the panel is disposed in the gap portion on the step portion, and the edge portion does not contact the bent R portion at the inner lower end of the outer peripheral wall portion. Therefore, by providing the stepped portion, interference between the edge portion of the panel and the bent R portion of the outer peripheral wall portion can be prevented, the panel can be positioned with high accuracy, and damage to the edge portion and the like can be prevented. Further, it is not necessary to separately prepare a member and install it on a frame or the like, and the member cost and the manufacturing process are not increased.

  The display device of the present invention is characterized in that the stepped portion extends along an outer periphery of the display panel or the touch panel to be supported. That is, in this display device, the stepped portion extends not only at the outer peripheral wall portion but also along the outer periphery of the supporting display panel or touch panel, so that the stepped portion closes the gap on the outer peripheral side and is incorporated. It is possible to prevent the intrusion of garbage into the interior in a state where it has been removed.

  Further, the display device of the present invention is characterized in that an optical plate or an optical sheet is installed inside the stepped portion. That is, in this display device, since the optical plate or the optical sheet is installed inside the step portion, the entire space is thickened by effectively using the space formed inside the step portion for the optical plate or optical sheet. It can be suppressed.

  Furthermore, the display device of the present invention is characterized in that the display panel is a liquid crystal display panel and the optical plate is a polarizing plate. That is, in this display device, since the polarizing plate used for the liquid crystal display panel is arranged inside the step portion, a thin liquid crystal display device can be obtained.

The present invention has the following effects.
That is, according to the display device according to the present invention, the frame has the step portion formed between the lower surface support portion and the inner lower end of the outer peripheral wall portion and recessed below the lower surface support portion. Without increasing the cost and manufacturing process, the panel can be positioned with high accuracy and damage to the edge portion and the like can be prevented.

  Hereinafter, a display device according to a first embodiment of the present invention will be described with reference to FIGS. In each drawing used in the following description, the scale is appropriately changed to make each member a recognizable size.

The display device 10 according to the present embodiment includes, for example, a display panel 11 that is a liquid crystal display panel mounted on a car navigation device, a frame 12 that supports the display panel 11, and a display panel 11 that is installed below the display panel 11 and below the display panel 11. And a backlight unit 13 for illuminating from.
In the present embodiment, the screen side of the display panel 11 is described as the upper surface side, and the light emission direction of the backlight unit 13 is described as the upward direction.

  The display panel 11 is a transmissive or transflective liquid crystal display panel. For example, in the case of the transmissive liquid crystal display panel 11, a TFT liquid crystal method, a STN liquid crystal method, a TN liquid crystal method, or the like in which a liquid crystal material is sealed with a sealing material in a gap between an upper substrate and a lower substrate each having a transparent electrode and an alignment film. The panel main body 14 and a pair of polarizing plates (optical plate or optical sheet) 15 installed on the upper and lower surfaces of the panel main body 14 are provided.

The frame 12 as a whole is a rectangular frame shape that follows the outer shape of the display panel 11 and the backlight unit 13, and is manufactured by bending a metal plate or the like, or by integral molding of a synthetic resin. Things are adopted.
The frame 12 abuts on the outer peripheral surface of the display panel 11 to be supported and has an inner peripheral lower end 12a disposed below the lower surface of the display panel 11 and a lower surface side of the display panel 11 to be supported. A lower surface support portion 12b contacting the lower surface, a step portion 12c formed between the lower surface support portion 12b and the inner lower end of the outer peripheral wall portion 12a and recessed downward from the lower surface support portion 12b, and an outer periphery of the backlight unit 13 A lower support portion 12d that is formed along the surface and supports the backlight unit 13.

A total of eight outer peripheral wall portions 12 a are arranged in the vicinity of the four corners of the frame 12, respectively. That is, at the corner portion of the frame 12, the outer peripheral wall portion 12 a paired with two sides constituting the corner portion is erected so as to face the outer peripheral surface of the display panel 11.
The step portion 12c extends not only at the outer peripheral wall portion 12a but also along the outer periphery of the display panel 11 to be supported. In the present embodiment, the step portion 12 c is formed to extend on one of the long side and one of the short sides of the frame 12. Note that the step portion 12 c may be formed so as to surround the display panel 11 over the entire circumference of the frame 12.

A polarizing plate 15 disposed on the lower surface of the panel body 14 is installed inside the step portion 12c.
The stepped portion 12c is set to a width of about 4 times the thickness of the frame 12.

  The backlight unit 13 guides light incident on the light source such as an LED light source and a fluorescent tube and light incident on the light source and converts the optical path to emit planar illumination light to the display panel 11 from the upper surface. An optical plate (not shown) and an optical plate or an optical sheet (not shown) such as a reflection sheet installed under the light guide plate, a diffusion plate and a prism sheet installed on the light guide plate, and the like.

  As described above, in the display device 10 according to the present embodiment, the frame 12 includes the step portion 12c that is formed between the lower surface support portion 12b and the inner lower end of the outer peripheral wall portion 12a and is recessed below the lower surface support portion 12b. Therefore, the edge portion 11a of the display panel 11 is arranged in the gap portion on the step portion 12c that is one step lower than the lower surface support portion 12b, and the edge portion 11a is in the bent R portion at the inner lower end of the outer peripheral wall portion 12a. Do not touch. Therefore, by providing the step portion 12c, interference between the edge portion 11a of the display panel 11 and the bent R portion of the outer peripheral wall portion 12a can be prevented, the display panel 11 can be positioned with high accuracy and the edge portion 11a and the like are damaged. Can be prevented. Further, it is not necessary to separately prepare a member and install it on the frame 12 or the like, and the member cost and the manufacturing process are not increased.

Further, since the stepped portion 12c extends not only in the outer peripheral wall portion 12a but also along the outer periphery of the display panel 11 to be supported, the stepped portion 12c blocks the gap on the outer peripheral side and is incorporated. It is possible to prevent the intrusion of garbage inside.
Furthermore, since the polarizing plate 15 is installed inside the stepped portion 12c, it is possible to prevent the whole from becoming thick by effectively using the space formed inside the stepped portion 12c for the polarizing plate 15. .

  Next, a second embodiment of the display device according to the present invention will be described below with reference to FIG. Note that, in the following description of the embodiment, the same components described in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The difference between the second embodiment and the first embodiment is that, in the first embodiment, the outer peripheral surface of the display panel 11 is supported by the outer peripheral wall portion 12a of the frame 12, whereas the display of the second embodiment. As shown in FIG. 4, the device 20 includes a touch panel 21 installed above the display panel 11, and the frame 12 supports the touch panel 21.

  That is, in the second embodiment, the display panel 11 and the backlight unit 13 are installed inside the lower support portion 12d of the frame 12, and the outer peripheral surface of the touch panel 21 is applied to the outer peripheral wall portion 12a of the upper portion of the frame 12. The lower surface of the touch panel 21 of the lower surface support portion 12b comes into contact with the touch panel 21, and the touch panel 21 is supported.

  The touch panel 21 can employ a known method such as a resistance film method. For example, in the case of the resistance film method, a glass plate 21a serving as a base on which a transparent electrode (not shown) such as ITO is formed, and the glass plate And a film 21b installed on 21a.

  As described above, in the display device 20 according to the second embodiment, the edge portion 21a of the touch panel 21 is arranged in the gap portion on the step portion 12c that is one step lower than the lower surface support portion 12b, and the edge portion 21a is inside the outer peripheral wall portion 12a. Since the bent R portion at the lower end is not contacted, the touch panel 21 can be positioned with high accuracy and the edge portion 21a and the like can be prevented from being damaged.

  In addition, this invention is not limited to said each embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.

For example, in each of the embodiments described above, the present invention is applied to a liquid crystal display device for a car navigation device. However, a mobile phone, a PDA, a mobile type PC (personal computer), an ATM (automated teller machine), a portable music player, etc. You may apply to the display apparatus mounted in another electronic device.
Moreover, although the liquid crystal display panel is employ | adopted as a display panel, you may employ | adopt other display panels, such as an organic electroluminescent panel.

In 1st Embodiment of the display apparatus which concerns on this invention, it is an expanded longitudinal cross-sectional view which shows the principal part of a display apparatus. In 1st Embodiment, it is a disassembled perspective view which shows a display apparatus. In 1st Embodiment, it is the top view, side view, and front view which show a display apparatus. In 2nd Embodiment of the display apparatus which concerns on this invention, it is an expanded longitudinal cross-sectional view which shows the principal part of a display apparatus. In the conventional example of the display apparatus which concerns on this invention, it is an expanded longitudinal cross-sectional view which shows the principal part of a display apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10,20 ... Display apparatus, 11 ... Display panel, 12 ... Frame, 12a ... Outer peripheral wall part, 12b ... Lower surface support part, 12c ... Step part, 15 ... Polarizing plate, 21 ... Touch panel

Claims (4)

A display panel;
A frame that supports the display panel or a touch panel installed above the display panel,
The outer peripheral wall portion in which the frame is in contact with the outer peripheral surface of the display panel or the touch panel to be supported and the inner lower end is disposed below the lower surface of the display panel or the touch panel;
A lower surface support portion formed on the lower surface side of the display panel or the touch panel to be supported and in contact with the lower surface;
A display device comprising: a step portion formed between the lower surface support portion and an inner lower end of the outer peripheral wall portion and recessed below the lower surface support portion. The display device according to claim 1,
The display device, wherein the step portion extends along an outer periphery of the display panel or the touch panel to be supported. The display device according to claim 1 or 2,
A display device, wherein an optical plate or an optical sheet is installed inside the stepped portion. The display device according to claim 3,
The display panel is a liquid crystal display panel;
The display device, wherein the optical plate is a polarizing plate.

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