KR19980031017U - LCD module with improved ground terminal - Google Patents

Abstract

The present invention relates to an LCD module having an improved grounding end, and one side of the module holder is directly connected to the grounding end of the PCB, or the holder part corresponding to the grounding end is bent and connected to the grounding end and soldered, so that an external impact or environment Noise is prevented, and the assembly process of the grounding terminal is omitted in the module assembly process, thereby simplifying the process and improving process yield and reliability of device operation.

Description

LCD module with improved ground terminal

The present invention relates to a liquid crystal display (LCD) module having an improved grounding stage, in particular an LCD panel, a light source and a printed circuit board (hereinafter referred to as a PCB) on a plastic frame. The LCD module which is mounted and the upper part of the holder is covered and protected by directly connecting one side of the holder with the ground terminal of the PCB to prevent the degradation of the operating characteristics due to poor grounding or yield during assembly.

LCD, a type of flat-panel display, is an apparatus that obtains an image with a difference in contrast obtained by changing an optical anisotropy by applying an electric field to a liquid crystal that combines liquidity and optical properties of a crystal. Twisted Nematic (TN), Super TN (STN), Ferroelectric LCD (FLCD), and TFT LCD are used.

Such LCDs have lower power consumption, easier thin and shorter sizes, and can be colored, larger, and more refined than conventional cathode ray tubes.

In general, LCDs are formed in a form in which transparent electrode patterns, which are opposite electrodes, are formed on transparent upper and lower waves, the upper and lower substrates are sealed to have a predetermined interval, and a liquid crystal is sealed in a cell gap therebetween.

The LCD operates with only two colors, the background color of the liquid crystal and the pixel color when driving the liquid crystal. In order to colorize the LCD, a color filter is formed on one substrate.

Since such LCDs do not display screens independently, all LCDs except for reflective LCDs are light emitting devices, for example, electro luminescence (EL) devices or light emitting diodes (LEDs). It is used in the form of a module together with a panel or a cold cathode fluorescence lamp (hereinafter referred to as CCFL).

1 is a cross-sectional view of the LCD module according to the prior art, a cross-sectional view of the ground portion.

First, the LCD 12, the backlight panel 14 serving as the light source, and the PCB 16 on which the driving elements are mounted are sequentially mounted on the rectangular plastic frame 18, and the upper edge portion thereof is mounted. The module holder 10 of the rectangular frame shape is covered. The module holder 10 is attached to the plastic frame 18 to fix the LCD 12, the backlight panel 14, and the PCB 16.

In this case, the LCD 12 and the PCB 16 are electrically connected to each other by a heat seal or a tab package 17, and at one side of the PCB 16, a grounding terminal made of a material such as beryllium-kappa or bronze ( 20) is soldered and pressed into the module holder 10 to ground.

In the conventional LCD module as described above, if a gap is generated between the holder and the ground terminal due to shock or shaking generated during handling of the module, noise is generated in the device because the ground is not made, and the grounding terminal must be soldered in a separate operation. There is a problem that the yield is lowered in the castle.

The purpose of the present invention for solving the above problems is to set a part for grounding on one side of the holder so that the part is directly connected to the PCB, and the process is simple, preventing the occurrence of poor grounding due to impact or shaking process The present invention provides an LCD module that can improve yield and reliability of device operation.

1 is a cross-sectional view of a liquid crystal display module according to the prior art.

2 is a cross-sectional view of an LCD having an improved ground terminal according to an embodiment of the present invention.

3 is a cross-sectional view of an LCD having an improved ground terminal according to another exemplary embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10 module holder 12 LCD

14 back light panel 16 printed circuit board

17: tab package 18: plastic frame

20: grounding terminal 22: grounding bent portion

24: soldering

The present invention is to achieve the above object, the characteristics of the LCD module according to the present invention,

In LCD module where LCD, backlight panel, PCB and plastic frame are fixed by module holder,

The module holder is provided with a protrusion for grounding which is electrically connected to the portion protruding from the ground terminal of the PCB.

Hereinafter, an LCD module according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view of the LCD module according to an embodiment of the present invention, a cross section of the ground end portion.

First, a backlight panel 14 such as an EL, LED or CCFL panel, and an LCD 12 in which liquid crystals are sealed on two insulating substrates are sequentially mounted on a rectangular plastic frame 18. On one side of the LCD 12, a PCB 16 on which driving elements are mounted is mounted and electrically connected to each other by a heat seal or a tab package 17. A module holder having a rectangular frame shape is formed at an upper edge thereof. 10) is covered. Here, the module holder 10 is formed of a cold rolled steel sheet which is surface-treated with zinc, black chromate or nickel to prevent corrosion, and the PCB 16 and the tab package 17 are the module holder 10. The module holder 10 is attached to the plastic frame 18 to fix the LCD 12, the backlight panel 14, and the PCB 16.

In addition, a ground terminal (not shown) of the PCB 16 is formed on the rear side, and a portion corresponding to the ground terminal in the module holder 10 is bent and connected by soldering.

3 is a cross-sectional view of the LCD module according to another embodiment of the present invention, a cross section of the ground end portion.

First, the backlight panel 14, the LCD 12, the heat seal or tab package 17, and the PCB 16 are mounted and electrically connected to the plastic frame 18. 10 is covered and bound with the plastic frame 18 to fix the LCD 12, the backlight panel 14, and the PCB 16, and one side of the module holder 10 is cut and bent downward. The grounded bent portion 22 is formed so that the bent portion 22 is connected to the grounding terminal (not shown) of the PCB 16 by soldering 24.

As described above, in the LCD module with improved grounding stage according to the present invention, one side of the module holder is directly connected to the grounding end of the PCB, or the holder portion corresponding to the grounding end is bent and connected with the grounding end and soldering, The occurrence of noise due to the impact or the environment is prevented, and the assembly process of the grounding terminal is omitted in the module assembly process, thereby simplifying the process, thereby improving process yield and reliability of device operation.

Claims (1)

In LCD module where LCD, backlight panel, PCB and plastic frame are fixed by module holder, LCD module including a protrusion for grounding which is protruded and electrically connected to a portion corresponding to the ground end of the PCB from the module holder.