Device for measuring cohesive force of backlight and LCD (Liquid Crystal Display)

Abstract

The utility model discloses a device for measuring cohesive force of backlight and an LCD (liquid crystal display), and belongs to the technical field of measuring equipment for the cohesive force of the backlight and the LCD. Comprising a backlight, an LCD, a tension tester used for stretching the measured adhesive force of the backlight and the LCD, a fixing clamp used for fixing and limiting the positions of the backlight and the LCD, and a fixing substrate used for placing the backlight and the LCD and fixedly connected with the tension tester, and the fixing substrate is connected with the tension tester in a bolt connection mode. The fixing clamp is arranged on the fixing substrate and is in threaded connection with the fixing substrate, and the backlight and the LCD are fixed and limited on the fixing substrate by the fixing clamp and are located at the measuring position of the tension tester; according to the device, the backlight can be accurately fixed and limited, the hook is pasted on the LCD, so that the tension tester completes the measurement of the adhesive force between the backlight and the LCD after pulling the hook to move upwards, the accurate measurement of the adhesive force between the backlight and the LCD is realized, and a basis is provided for judging whether the backlight and the LCD are separated or not through the measurement of the adhesive force.

Description

Technical Field

[0001] This utility model relates to the technical field of backlight and LCD adhesion force measurement equipment, specifically to a device for measuring the adhesion force between backlight and LCD. Background Technology

[0002] During the use of an LCD monitor, the backlight provides the light source behind the liquid crystal display. If the adhesion between the two is insufficient, factors such as daily vibration, impact, or temperature changes may cause the LCD and backlight to separate, affecting the display effect or even making the monitor malfunction. By accurately measuring the adhesion force, sufficient strength can be ensured, effectively preventing this separation and guaranteeing the normal functioning of the product.

[0003] Measuring the adhesion force between an LCD (Liquid Crystal Display) and its backlight is an important means of evaluating the bond strength between the two. When the LCD and backlight separate or display malfunctions, adhesion force measurement is one of the important methods for failure analysis. By measuring the adhesion force of the faulty product and comparing it with that of the normal product, combined with other methods such as microscopic analysis of the bonded area and performance testing of the bonding material, the cause of the failure can be accurately identified, such as adhesive quality problems, bonding process defects, abnormal use environment, etc. This provides a basis for judging whether the backlight and LCD will separate. Therefore, this device provides a means of measuring the adhesion force between the backlight and the LCD. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a device for measuring the adhesion force between backlight and LCD, thereby solving the aforementioned technical problems.

[0005] The present invention adopts the following technical solution: it includes a backlight and an LCD, and further includes a tensile tester for measuring the adhesion force between the backlight and the LCD, a fixing clamp for fixing and limiting the position of the backlight and the LCD, and a fixing base plate for placing the backlight and the LCD and fixingly connecting them to the tensile tester. The fixing base plate is connected to the tensile tester by bolts. The fixing clamp is disposed on the fixing base plate and is threaded. The backlight and the LCD are fixed and limited on the fixing base plate by the fixing clamp and are located at the measurement position of the tensile tester. A hook is attached to the LCD.

[0006] Furthermore, the tensile testing instrument is provided with a placement platform, the placement platform is provided with several threaded holes, and the tensile testing instrument is provided with a tensile measuring hook that is connected to the hook for hanging.

[0007] Furthermore, the fixing base plate includes a base plate and connecting bolts. There are several connecting bolts, and each of the connecting bolts is threaded to a threaded hole on the placement platform. The base plate has several fixing holes, and the connecting bolts pass through the corresponding fixing holes and are threaded into the corresponding threaded holes.

[0008] Furthermore, the base plate is symmetrically provided with two rows of limiting holes, and the base plate is provided with auxiliary grooves for the backlight legs.

[0009] Furthermore, the fixing fixture includes a fixing plate, a limiting bolt, and a fixing bolt. There are two fixing plates, which are symmetrically arranged. Each of the two fixing plates has several internal threaded holes on its side. There are several limiting bolts, which are threadedly connected to the corresponding limiting holes. There are several fixing bolts, which pass through the corresponding internal threaded holes and abut against both sides of the backlight.

[0010] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0011] This invention enables precise fixation and positioning of the backlight. A hook is attached to the LCD, allowing a tensile testing instrument to measure the adhesion force between the backlight and the LCD after pulling the hook upwards. This accurate measurement of the adhesion force provides a basis for determining whether the backlight and LCD will separate. Measuring the adhesion force also ensures that the bonding strength between the LCD and the backlight meets product design requirements, preventing separation during use and improving product reliability and stability. Furthermore, understanding the impact of different process parameters on adhesion force helps optimize the bonding process, select suitable adhesives and process conditions, reduce production costs, and improve production efficiency. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a three-dimensional structural diagram of the fixed base plate and the fixed clamp in this utility model;

[0015] Figure 3 This is a partial breakdown of the present invention. Figure 1 ;

[0016] Figure 4 This is a partial breakdown of the present invention. Figure 2 .

[0017] Figure Labels

[0018] Backlight 1, LCD 11, Hook 12, Tensile tester 2, Placement platform 21, Threaded hole 22, Tensile measuring hook 23, Fixing base plate 3, Base plate 31, Fixing hole 311, Connecting bolt 32, Limiting hole 33, Auxiliary groove 34, Fixing clamp 4, Fixing plate 41, Internal threaded hole 411, Limiting bolt 42, Fixing bolt 43. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0021] This utility model embodiment provides a device for measuring the adhesion force between a backlight and an LCD, including a backlight 1 and an LCD 11, and further including a tensile tester 2 for measuring the adhesion force between the backlight 1 and the LCD 11 by stretching, a fixing clamp 4 for fixing and limiting the position of the backlight 1 and the LCD 11, and a fixing base plate 3 for placing the backlight 1 and the LCD 11 and fixingly connecting them to the tensile tester 2. The fixing base plate 3 is connected to the tensile tester 2 by bolts. The fixing clamp 4 is disposed on the fixing base plate 3 and is threaded. The backlight 1 and the LCD 11 are fixed and limited on the fixing base plate 3 by the fixing clamp 4 and are located at the measurement position of the tensile tester 2. A hook 12 is attached to the LCD 11.

[0022] This device can accurately fix and limit the backlight 1. A hook 12 is attached to the LCD 11, allowing the tensile tester 2 to measure the adhesion force between the backlight 1 and the LCD 11 after pulling the hook 12 upwards. This accurate measurement of the adhesion force provides a basis for determining whether the backlight 1 and LCD 11 will separate. Measuring the adhesion force also ensures that the bonding strength between the LCD 11 and the backlight 1 meets product design requirements, preventing separation during use and improving product reliability and stability. Furthermore, understanding the impact of different process parameters on the adhesion force helps optimize the bonding process, select appropriate adhesives and process conditions, reduce production costs, and improve production efficiency.

[0023] The significance of this device's measurement is threefold: First, product quality control: by measuring the adhesive force, it can ensure that the bonding strength between LCD11 and backlight 1 meets the product design requirements, preventing separation during use and improving product reliability and stability. Second, process optimization: understanding the impact of different process parameters on adhesive force helps optimize the bonding process, select appropriate adhesives and process conditions, reduce production costs, and improve production efficiency. Third, failure analysis: when a product experiences a failure where LCD11 separates from backlight 1, adhesive force measurement can help analyze the cause of the failure, whether it is due to adhesive problems, process issues, or other factors, thereby enabling the implementation of corresponding improvement measures.

[0024] In a further preferred embodiment of this utility model, the tensile testing instrument 2 is provided with a placement platform 21, the placement platform 21 is provided with a plurality of threaded holes 22, the tensile testing instrument 2 is provided with a tensile measuring hook 23 connected to the hook 12 for hanging, the fixed base plate 3 includes a base plate 31 and connecting bolts 32, the connecting bolts 32 are provided with a plurality of bolts, each of the bolts 32 being threadedly connected to the threaded holes 22 on the placement platform 21, the base plate 31 is provided with a plurality of fixing holes 311, and the plurality of connecting bolts 32 pass through the corresponding fixing holes 311 and are threadedly connected to the corresponding threaded holes 22. Two rows of limiting holes 33 are symmetrically arranged on the layer plate 31. The base plate 31 is provided with auxiliary grooves 34 for the legs of the backlight 1. The fixing fixture 4 includes a fixing plate 41, limiting bolts 42 and fixing bolts 43. There are two fixing plates 41, which are symmetrically arranged. Each side end of the two fixing plates 41 is provided with a number of internal threaded holes 411. There are a number of limiting bolts 42, which are threadedly connected to the corresponding limiting holes 33. There are a number of fixing bolts 43, which pass through the corresponding internal threaded holes 411 and abut against both sides of the backlight 1.

[0025] The auxiliary groove 34 on the base plate 31 facilitates the placement of the backlight 1 leg on the backlight 1 during the measurement process;

[0026] When measuring the adhesion force between the backlight 1 and the LCD 11, the base plate 31 is first placed on the platform 21 of the tensile testing instrument 2. Then, several connecting threads pass through the corresponding fixing holes 311 and are threaded into the corresponding threaded holes 22 to fix the base plate 31 on the platform 21. Next, the backlight 1 and LCD 11 are placed at the center of the base plate 31. At this point, two fixing plates 41 are symmetrically placed on both sides of the backlight 1 and LCD 11, with a distance of 0.5cm to 1.5cm between the two fixing plates 41 and the backlight 1 and LCD 11. The two fixing plates 41 are then... The corresponding limiting bolt 42 is threadedly connected to the corresponding limiting hole 33, so that the two fixing plates 41 are fixed on the base plate 31. Then, several fixing threads pass through the corresponding internal thread hole 411 and abut against both sides of the backlight 1. At this time, the fixing and limiting operation of the backlight 1 and LCD 11 is completed. Finally, the hook (12) is pasted on the upper surface of LCD 11, and the hook (12) is hung and connected by the tensile measuring hook 23 on the tensile tester 2. After the tensile tester 2 starts to pull the hook (12) upward through the tensile measuring hook 23, the bonding force between the backlight 1 and LCD 11 is measured.

[0027] This device can be adapted to various widths of backlight 1 and LCD 11 for fixed testing by fixing the two fixing plates 41 in different positions, thus facilitating its widespread use.

[0028] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. An apparatus for measuring the adhesion force between a backlight and an LCD, comprising a backlight (1) and an LCD (11), characterized in that... ； It also includes a tensile tester (2) for measuring the adhesion between the backlight (1) and the LCD (11); A fixing clamp (4) for fixing and limiting the position of the backlight (1) and the LCD (11); A fixed substrate (3) for placing the backlight (1) and the LCD (11) and for fixedly connecting to the tensile tester (2); The fixed base plate (3) is connected to the tensile tester (2) by bolt connection. The fixing clamp (4) is set on the fixed base plate (3) and is threaded connection. The backlight (1) and LCD (11) are fixed and limited on the fixed base plate (3) by the fixing clamp (4) and are located at the measurement position of the tensile tester (2). The LCD (11) is attached with a hook (12).

2. The device for measuring the adhesion force between backlight and LCD as described in claim 1, characterized in that: The tensile tester (2) is provided with a placement platform (21), the placement platform (21) is provided with a plurality of threaded holes (22), and the tensile tester (2) is provided with a tensile measuring hook (23) that is connected to the hook (12) for hanging.

3. The device for measuring the adhesion force between backlight and LCD as described in claim 2, characterized in that: The fixed base plate (3) includes a base plate (31) and connecting bolts (32). There are several connecting bolts (32), and each of the several connecting bolts (32) is threadedly connected to the threaded hole (22) on the placement platform (21). There are several fixing holes (311) on the base plate (31), and the several connecting bolts (32) pass through the corresponding fixing holes (311) and are threadedly connected to the corresponding threaded hole (22).

4. The device for measuring the adhesion force between backlight and LCD as described in claim 3, characterized in that: The base plate (31) is provided with two rows of limiting holes (33) symmetrically arranged, and the base plate (31) is provided with auxiliary grooves (34) for the backlight (1) legs of the backlight (1).

5. The device for measuring the adhesion force between backlight and LCD as described in claim 4, characterized in that: The fixing clamp (4) includes a fixing plate (41), a limiting bolt (42), and a fixing bolt (43). There are two fixing plates (41), which are symmetrically arranged. Each of the two fixing plates (41) has several internal threaded holes (411) on its side. There are several limiting bolts (42), which are threadedly connected to the corresponding limiting holes (33). There are several fixing bolts (43), which pass through the corresponding internal threaded holes (411) and abut against both sides of the backlight (1).

Images