CN205193383U - Right angle structure of pad in a poor light - Google Patents

Abstract

The utility model relates to a liquid crystal display module field especially relates to a right angle structure of pad in a poor light. The utility model provides a right angle structure of pad in a poor light, including superimposed POL, LCD, POL, board that is shaded down gone up in proper order, still including setting up in the FPC in a poor light of the board bottom of being shaded and set up in the IC of LCD bottom, the last module FPC that is provided with of LCD, LCD includes LCD and lower LCD, module FPC with the pad has all been welded on the FPC in a poor light, be shaded FPC the pad extension elongation with module FPC's pad extension elongation is with the POL thickness and the lower LCD thickness sum one -tenth right angled triangle length of side concern down. The utility model discloses it counterpoints inaccurately to produce the pad when can effectively solve the LCM welded easily to causing rosin joint, dummy solder joint's problem, leading to the module black screen, the customer who increases the front end verifies and the complete machine equipment qualification rate of success rate and volume production reduces the market repair rate.

Description

A kind of right-angle structure of backlight pad

Technical field

The utility model relates to liquid crystal display module field, particularly relates to a kind of right-angle structure of backlight pad.

Background technology

In the design of current LCM, lamp and the main FPC of backlight are connected by pad, thus drive the lamp of backlight by mainboard, play the light source of LCM display.The FPC of current main FPC and backlight lamp bar is placed in the middle by AA district, and both are with the glue frame of backlight for benchmark, and the FPC pad of lamp and the coincidence of main FPC pad design, and the length of stretching out is the same, and such way exists following problem:

If 1 according to former design, backlight FPC is parallel with the pad of module FPC, both are in the process of welding, due between the two also every time POL and lower LCD, there is individual difference in height, easily produce pad contraposition when welding to be forbidden, thus cause the problem of rosin joint, dry joint, cause module blank screen.2, when welding, due to pad off normal, so need special tool Tilt Over Mode bond pads, or by hand Tilt Over Mode bond pads, welding efficiency is lower.

Utility model content

The purpose of this utility model is for the deficiencies in the prior art, a kind of right-angle structure of backlight pad is provided, easily produce pad contraposition when can solve LCM welding preferably to be forbidden, thus cause the problem of rosin joint, dry joint, cause module blank screen, increase the customer authentication success ratio of front end and the complete machine packaging qualification rate of volume production, reduce market repair rate.

To achieve these goals, the technical solution adopted in the utility model is to provide a kind of right-angle structure of backlight pad, comprise the upper POL superposed successively, LCD, lower POL, backlight, also comprise the backlight FPC be arranged at bottom backlight and the IC be arranged at bottom LCD, described LCD is provided with module FPC, described LCD comprises LCD and lower LCD, described module FPC and described backlight FPC is welded with pad, the pad extension elongation of described backlight FPC and the pad extension elongation of described module FPC and lower POL thickness and the lower LCD thickness sum triangle length of side at a right angle relation.

As further improvement of the utility model, described lower POL thickness and lower LCD thickness sum and described module FPC pad extension elongation sum are greater than the length that described backlight FPC stretches out.

As further improvement of the utility model, the quadratic sum of described lower POL thickness and lower LCD thickness sum and described module FPC pad extension elongation equal the length that described backlight FPC stretches out square.

As further improvement of the utility model, the AA district center alignment of LCD described in the VA region of described backlight.

As further improvement of the utility model, the pads parallel of the pad on described module FPC and described backlight FPC and overlapping.

The beneficial effects of the utility model are: easily produce pad contraposition time the utility model effectively can solve LCM welding and forbidden, thus cause the problem of rosin joint, dry joint, cause module blank screen, increase the customer authentication success ratio of front end and the complete machine packaging qualification rate of volume production, reduce market repair rate.

Accompanying drawing explanation

Fig. 1 is side view of the present utility model.

Embodiment

To illustrate below in conjunction with accompanying drawing and embodiment further illustrates the utility model.

Numeral in figure: 1, lower POL; 2, lower LCD; 3, upper LCD; 4, upper POL; 5, IC; 6, backlight FPC; 7, pad; 8, module FPC.

Design concept of the present utility model: the thickness taking into full account POL and LCD during design drawing, according to the right angle principle of design, calculates the length of backlight FPC bending.

As shown in Figure 1, the utility model provides a kind of right-angle structure of backlight pad, comprise the upper POL (4) superposed successively, LCD, lower POL (1), backlight, also comprise the backlight FPC (6) be arranged at bottom backlight and the IC (5) be arranged at bottom LCD, described LCD is provided with module FPC (8), described LCD comprises LCD (3) and lower LCD (2), described module FPC (8) and described backlight FPC (6) are welded with pad (7), the length that described backlight FPC (6) pad stretches out and described module FPC pad extension elongation and lower POL (1) thickness and lower LCD (2) the thickness sum triangle length of side at a right angle relation.

Described lower POL (1) thickness and lower LCD (2) thickness sum and described module FPC (8) pad extension elongation sum are greater than the length that described backlight FPC stretches out.

The quadratic sum of described lower POL (1) thickness and lower LCD (2) thickness sum and described module FPC (8) pad extension elongation equal the length that described backlight FPC stretches out square.

Module design is the AA district center alignment of LCD described in the VA region by backlight, then with the glue frame outer of backlight for benchmark, the pad of the pad of backlight FPC and module FPC overlaps and designs.

The pads parallel of the pad on described module FPC and described backlight FPC and overlapping.

Consider the thickness of POL and LCD, can avoid when welding, easily producing pad contraposition preferably and be forbidden, thus cause rosin joint, dry joint, cause the problem of module blank screen.

Shown in Fig. 1, significantly can find out the structure of each layer, if according to former design, backlight FPC is parallel with the pad of module FPC, and both are in the process of welding, due between the two also every time POL (1) and lower LCD (2), there is individual difference in height, easily produce pad contraposition when welding to be forbidden, thus cause the problem of rosin joint, dry joint, cause module blank screen.

After change, the length of the FPC of backlight considers the thickness of POL and LCD, pad contraposition can be avoided preferably to be forbidden, thus cause the problem of rosin joint, dry joint in the assembling of reality.

New computing method:

Suppose: module FPC pad extension elongation is a

Lower POL thickness is b

Lower LCD thickness is c

Backlight FPC pad extension elongation is d

Then: $d=\sqrt{a^2+{(b+c)}^2}$

Before improvement, easily occur welding off normal, the problems such as rosin joint, cause module blank screen, and after improvement, backlight FPC and module FPC pad can well be corresponding, can improve the problem of welding off normal preferably.

Weld before improvement, general needs lifts micro-for LCM, needs the inclined position module according to pad when welding, so that better contraposition; Add backlight FPC length after improvement, thus can improve the gimmick of welding, hand can lie horizontally module and weld, and pad locations can contraposition preferably, is not easy to be partially welded, and improves the efficiency of welding.

Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should be considered as belonging to protection domain of the present utility model.

Claims (5)

1. the right-angle structure of a backlight pad, it is characterized in that: comprise upper POL, the LCD superposed successively, lower POL, backlight, also comprise the backlight FPC be arranged at bottom backlight and the IC be arranged at bottom LCD, described LCD is provided with module FPC, described LCD comprises LCD and lower LCD, described module FPC and described backlight FPC is welded with pad, the pad extension elongation of described backlight FPC and the pad extension elongation of described module FPC and lower POL thickness and the lower LCD thickness sum triangle length of side at a right angle relation.

2. the right-angle structure of backlight pad according to claim 1, is characterized in that: described lower POL thickness and lower LCD thickness sum and described module FPC pad extension elongation sum are greater than the length that described backlight FPC stretches out.

3. the right-angle structure of backlight pad according to claim 1, is characterized in that: the quadratic sum of described lower POL thickness and lower LCD thickness sum and described module FPC pad extension elongation equal the length that described backlight FPC stretches out square.

4. the right-angle structure of backlight pad according to claim 1, is characterized in that: the AA district center alignment of LCD described in the VA region of described backlight.

5. the right-angle structure of backlight pad according to claim 1, is characterized in that: the pads parallel of the pad on described module FPC and described backlight FPC and overlapping.