KR20110087835A - Liquid crystal display of mobile terminal - Google Patents

Abstract

The present invention relates to a liquid crystal display device of a mobile communication terminal, the liquid crystal display device of the mobile communication terminal according to the present invention accommodates a liquid crystal panel, a backlight unit disposed below the liquid crystal panel, the backlight unit and coated with a conductive material By including the molded frame, an effect of increasing the reception sensitivity of the internal antenna of the mobile communication terminal can be expected.

Description

Liquid crystal display of mobile communication terminal

The present invention relates to a liquid crystal display device of a mobile communication terminal.

In general, a mobile communication terminal such as a mobile phone includes an antenna as an important component for determining its performance, which converts an electrical signal into an electromagnetic signal to receive an air signal into the mobile communication terminal and receives an internal signal. It serves to send to the air. At this time, the traditional antenna is a helical (syubby) antenna (syubby antenna), a helical and a retractable antenna (retractable antenna) to apply a monopole (helopole) together at least a portion of the antenna protrudes to the outside of the product External antennas (or protruding antennas) were mainly used. However, the external antenna has a problem in that it obstructs aesthetics by obstructing the thin and short size of the product, which is a demand of the consumer, and is inconvenient to use and carry, and has a relatively large amount of Specific Absorption Rate (SAR) absorbed by the user.

Accordingly, mobile communication terminals such as plate inverted F antenna (PIFA), inverted F antenna (IFA), folded monopole, dipole, loop, slot, ceramic chip antenna, etc. The so-called built-in built-in antenna (or internal antenna) was introduced. The built-in antenna can reduce the SAR due to the flexible design of the radiation pattern, but has a problem in that the gain is slightly lowered and the band characteristic is lowered due to interference with adjacent components.

The present invention provides a liquid crystal display device of a mobile communication terminal that can improve the sensitivity characteristics of the built-in antenna.

According to an aspect of the present invention, there is provided a liquid crystal display of a mobile communication terminal including a liquid crystal panel, a backlight unit disposed below the liquid crystal panel, and a mold frame accommodating the backlight unit and coated with a conductive material.

In an embodiment of the present invention, by coating the mold frame containing the backlight unit with a conductive material, it is possible to increase the reception sensitivity of the internal antenna of the mobile communication terminal.

1 is an exploded perspective view of a liquid crystal display of a mobile communication terminal according to an embodiment of the present invention.
FIG. 2 is an assembly view of FIG. 1.
3 is a cross-sectional view taken along AA in FIG. 2.
4 is a graph illustrating antenna reception sensitivity for each frequency band of a mobile communication terminal using a mold frame according to an embodiment of the present invention.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Now, a liquid crystal display of a mobile communication terminal according to an embodiment of the present invention will be described in detail with reference to the drawings, and the same or corresponding elements are denoted by the same reference numerals regardless of the reference numerals, and duplicate description thereof will be given. It may be omitted.

1 is an exploded perspective view of a liquid crystal display device of a mobile communication terminal according to an embodiment of the present invention, FIG. 2 is an assembly view of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line A-A of FIG. 2.

1 to 3, the liquid crystal display of the mobile communication terminal includes a liquid crystal panel 10, a backlight unit 20, and a mold frame 30.

The liquid crystal panel 10 is a panel in which a liquid crystal layer is formed between the upper and lower substrates facing each other, and the liquid crystal cells are arranged in a matrix form at the intersections of the plurality of gate lines G and the data lines D. .

The liquid crystal panel 10 is arranged on the top surface of the backlight unit 20 and is accommodated in the mold frame 30.

The backlight unit 20 is accommodated in the mold frame 30 to generate light and emit upward.

The backlight unit 20 includes a reflective sheet 21, a light guide plate 22, a light emitting diode 23, and an optical sheet 24.

The reflective sheet 21 reflects light generated from the light emitting diode 23 upwards.

The light guide plate 22 is disposed on the upper surface of the reflective sheet 21 and receives light emitted from the light emitting diodes 23 and emits light upward through reflection, refraction, and scattering.

The light emitting diodes 23 are disposed on the side surfaces of the light guide plate 22 to generate light and emit light toward the side surfaces of the light guide plate 22.

The optical sheet 24 is disposed on the upper surface of the light guide plate to improve characteristics of light passing through the optical sheet 24.

The mold frame 30 is coated with a conductive material on a plastic or reinforced plastic material, such as polycarbonate.

In this case, the conductive material is a metal material having a strong deposition power on the plastic material, and may be a metal material such as copper (Cu) or nickel (Ni).

In the present invention, the conductive material may be coated on the mold frame 30 by a sputtering deposition method or an ion beam.

4 is a graph illustrating antenna reception sensitivity for each frequency band of a mobile communication terminal using a mold frame 30 according to an exemplary embodiment of the present invention.

In FIG. 4, "data A" is an antenna reception sensitivity for each frequency band of a mobile communication terminal having a mold frame 30 made of a plastic material, and "data B" is a mold frame 30 coated with a conductive material on a plastic material. The antenna reception sensitivity for each frequency band of the mobile communication terminal.

Data B is approximately 2-3 dB higher than data A over the entire frequency band.

That is, the experiment shows that the internal antenna of the mobile communication terminal in which the mold frame 30 is coated with the conductive material has better reception sensitivity than the internal antenna of the mobile communication terminal in which the mold frame 30 is not coated with the conductive material. have.

More specifically, in the related art, the mold frame 30 is made of only a plastic material, so that the mold frame 30 blocks the radio signal received by the internal antenna. However, in the present invention, the mold frame 30 is coated with a conductive material so that the mold frame 30 becomes conductive, thereby acting as a conductor so that the wireless signal is transmitted to the internal antenna.

As described above, in the present invention, by coating the mold frame 30 with a conductive material, the reception sensitivity of the internal antenna of the mobile communication terminal can be increased.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

10: liquid crystal panel
20: backlight unit
30: mold frame

Claims (5)

Liquid crystal panel,
A backlight unit disposed under the liquid crystal panel, and
And a mold frame receiving the backlight unit and coated with a conductive material. The method of claim 1,
The mold frame is a liquid crystal display device of a mobile communication terminal is a frame in which the conductive material is coated on a plastic material. The method of claim 2,
The mold frame is a liquid crystal display of a mobile communication terminal in which the conductive material is sputter deposited on the plastic material. The method of claim 2,
The mold frame is a liquid crystal display of a mobile communication terminal in which the conductive material is coated with an ion beam on the plastic material. The method according to any one of claims 1 to 4,
The conductive material is any one of copper or nickel liquid crystal display device of a mobile communication terminal.

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