JP2001117077A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a liquid crystal display device thin without decreasing the luminance and strength against mechanical stress such as vibration and impact. SOLUTION: In a liquid crystal display device having such a structure that a liquid crystal display panel 1 consisting of two glass sheets is housed inside a metal frame 5 with a color filter glass 6 as the display screen facing outside, the inner edge 5a of the metal frame 5 which constitutes the display window is disposed outside around the color filter glass 6. Thereby, the inner edge 5a of the metal frame 5 can be disposed lower and nearer to an array glass 7 under the color filter glass 6 so that the device can be made thin without decreasing the thickness of a light guide plate or other glass sheets.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a liquid crystal display device.

[0002]

2. Description of the Related Art In recent years, mobile applications have been increasing in the personal computer industry in which liquid crystal display devices are used, and there has been an increasing demand for thinner and lighter liquid crystal display devices compatible with mobile devices. As shown in FIG. 3, a conventional liquid crystal display device has a liquid crystal display panel 1, a printed circuit board 2 on which a driving circuit of the liquid crystal display panel 1 is formed, and a T mounted with a driving IC.
A CP (film carrier) 3 is assembled by inserting a dummy rubber 4 into a metal frame 5. Although not shown, a backlight unit including a light guide plate is provided between the liquid crystal display panel 1 and the printed circuit board 2. The liquid crystal display panel 1 is shown in FIG.
As shown in FIG. 3, the color filter glass 6 and the array side glass 7 larger than the color filter glass 6
Are formed so as to protrude, and the inner peripheral end 5a of the metal frame 5 which contacts the surface of the peripheral edge 6a of the color filter glass 6 also serves to hold the liquid crystal display panel 1.

In the liquid crystal display device having such a configuration, technical developments such as reducing the thickness of the light guide plate of the backlight unit and reducing the glass thickness of the color filter glass 6 and the array side glass 7 have been made in response to the reduction in thickness. Has been done.

[0004]

However, in the above-described method, since the brightness is reduced by reducing the thickness of the light guide plate, it has to be compensated by using a high-priced member such as an optical lens film. In addition, the corresponding method requires a process change in order to transport the thin glass, and there are technical problems and strength problems when the thin glass is made large-sized, resulting in an increase in cost.

[0005] The present invention solves the above-mentioned problems, without reducing the glass thickness of a light guide plate or a liquid crystal display panel.
An object is to realize a thin liquid crystal display device.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a liquid crystal display panel made of two glasses is provided such that an upper glass serving as a display screen faces outward. In a liquid crystal display device housed inside a metal frame, an inner peripheral edge of a metal frame constituting a display window is arranged on an outer peripheral side of the upper glass.

[0007] According to this configuration, the inner peripheral end of the metal frame is disposed lower toward the lower glass than in the conventional model in which the inner peripheral end of the metal frame is in contact with the peripheral surface of the upper glass. Therefore, the device can be made thinner without reducing the thickness of the light guide plate and the upper and lower glasses. According to a second aspect of the present invention, in the configuration of the first aspect, the liquid crystal display panel is configured such that at least three peripheral edges of the lower glass project by the upper glass and the lower glass formed larger than the upper glass. It is characterized by the following.

According to this configuration, at least three peripheral edges of the lower glass are pressed by the inner peripheral edge of the metal frame, so that mechanical stress such as vibration and impact of the liquid crystal panel can be sufficiently prevented. Thus, a reduction in strength can be avoided even though the apparatus is thin.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the liquid crystal display device according to the embodiment of the present invention has substantially the same configuration as that of the conventional liquid crystal display device described above with reference to FIGS. A panel 1 and a printed circuit board 2 on which a driving circuit of the liquid crystal display panel 1 is formed are arranged in parallel with each other, and an input terminal and an output terminal are provided at peripheral portions of mutually opposing surfaces of the liquid crystal display panel 1 and the printed circuit board 2, respectively. TCP with drive IC mounted so that
The metal frame 5 is provided outside the TCP 3. A dummy rubber 4 is interposed between the metal frame 5 and the input end of the TCP 3, and a backlight unit (not shown) made of a light guide plate or the like is provided between the liquid crystal display panel 1 and the printed board 2. Is provided.

However, in the liquid crystal display panel 1, as shown in FIG. 2, by disposing the color filter glass 6 at the center of the larger array side glass 7, the four peripheral edges 7a of the array side glass 7 can be formed. It is configured to protrude. The metal frame 5 has an L-shaped cross section so that the inner peripheral edge 5a constituting the display window is located on the outer peripheral side of the color filter glass 6, and covers the surface of the peripheral edge 7a of the array side glass 7. And so on. As a result, the inner side surface of the inner peripheral end portion 5a is arranged lower near the array side glass 7 and the outer side surface of the inner peripheral end portion 5a is located substantially in the same plane as the surface of the color filter glass 6. A holding member (not shown) for holding the printed circuit board 2 is provided at an edge of the metal frame 5 opposite to the display window.

According to such a configuration, the metal frame 5
The inner peripheral end 5a is located lower near the array side glass 7 than the conventional model in which the inner peripheral end 5a of the light guide plate is in contact with the peripheral edge surface of the color filter glass 6, so that the light guide plate and the color filter Even if the glass thickness of the glass 6 and the glass 7 on the array side are the same, the apparatus can be thinned. Also,
The four peripheral edges 7a of the array side glass 7 are
Is pressed by the inner peripheral end 5a of the liquid crystal panel 1.
Mechanical stress, such as vibration and impact, can be reliably prevented, and a reduction in strength can be avoided even with a thin device. Therefore, the same performance as that of the conventional model can be secured.

Moreover, the inner peripheral end 5a of the metal frame 5
Is in contact with the peripheral surface of the color filter glass 6 and the dummy rubber 4 in the conventional model, but here, only the dummy rubber 4 is in contact.
The force for pressing the input end of the TCP 3 toward the peripheral edge 7a of the array-side glass 7 via the interface becomes large, and the connection of the TCP 3 is ensured.

Accordingly, it can be expected as a structural means for further reducing the thickness of the liquid crystal display device in the future. As a specific example, a liquid crystal display device that was conventionally configured as having a thickness of 7.0 mm and a luminance of 150 cd / m2 can be manufactured without reducing the glass thickness of the light guide plate or the liquid crystal display panel, and thus involves a cost increase and luminance. 6.5mm in thickness (7% reduction)
Thinner. This thin liquid crystal display device was confirmed in a vibration and impact test to have the same strength as a conventional model.

The liquid crystal display panel 1 can be reliably held by the inner peripheral end 5a of the metal frame 5 by forming the three or four peripheral edges 7a of the array side glass 7 to protrude. A configuration in which only the two peripheral edges 7a of the array side glass 7 are protruded and held by the inner peripheral end 5a of the metal frame 5 is also possible. When the color filter glass 6 and the side peripheral edge of the array side glass 7 overlap, the corresponding inner peripheral end 5a of the metal frame 5 abuts on the color filter glass 6 and the outer peripheral surface of the array side glass 7. The shape may be flat.

[0015]

As described above, according to the present invention, a simple structure in which the inner peripheral portion of the metal frame forming the display window is disposed on the outer peripheral side of the upper glass serving as the display screen, lowering the performance and increasing the cost. The thickness of the liquid crystal display device can be reduced without causing the problem. In addition, by configuring the liquid crystal display panel so that at least three peripheral edges of the lower glass protrude, the projected peripheral edge is pressed by the inner peripheral edge of the metal frame to prevent vibration, shock, etc. of the liquid crystal panel. Mechanical stress can be sufficiently prevented, and a reduction in strength can be avoided even with a thin device.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is an oblique projection view of a liquid crystal display panel constituting the liquid crystal display device of FIG. 1;

FIG. 3 is a sectional view of a main part of a conventional liquid crystal display device.

FIG. 4 is an oblique projection view of a liquid crystal display panel constituting the liquid crystal display device of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal panel 2 Printed circuit board 3 TCP 4 Dummy rubber 5 Metal frame 5a Inner peripheral edge 6 Color filter glass 7 Array side glass 7a Peripheral edge

Claims (2)

[Claims] 1. A liquid crystal display device in which a liquid crystal display panel made of two sheets of glass is housed inside a metal frame such that an upper glass serving as a display screen faces outward, and a metal frame forming a display window is provided. A liquid crystal display device wherein an inner peripheral portion is arranged on an outer peripheral side of the upper glass. 2. The liquid crystal display panel according to claim 1, wherein the liquid crystal display panel is configured such that at least three peripheral edges of the lower glass project by the upper glass and the lower glass formed larger than the upper glass. Display device.