Backlight pressing tester

Abstract

The invention discloses a backlight pressing testing machine, and belongs to the technical field of liquid crystal display module (LCM) manufacturing, the backlight pressing testing machine comprises a backlight carrying table, a detection positioning groove is formed in the upper surface of the backlight carrying table, an LED detection piece is installed in the detection positioning groove, dismounting grooves are formed in the two sides of the detection positioning groove, and the LED detection piece is installed in the dismounting grooves. One side of the LED detection piece is fixedly connected with a flat cable connecting end; compared with the prior art, the method has the advantages that the foreign matter imaging problem is solved, specifically, foreign matters between the membrane materials are extruded and imaged through mechanical pressure, and the detection blind area caused by shielding of multiple layers of membrane materials is solved; internal defect detection is achieved, wherein the internal structure abnormity of the backlight module is detected through pressure changes; the problem of quality leakage detection is solved, foreign matters in the film material are presented and effectively detected, and the quality of a backlight finished product is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of liquid crystal display module (LCM) manufacturing, and particularly relates to a backlight pressing test machine. BACKGROUND

[0002] The liquid crystal module is simply a screen + backlight assembly. The display part of the liquid crystal television is the liquid crystal module, which is equivalent to the picture tube in the CRT. Other parts include power supply circuit, signal processing circuit, etc., and of course there is a shell. The module is mainly divided into a screen and a backlight assembly. The two parts are assembled together, but work independently of each other. After production, the surface of the screen needs to be detected by electricity to remove display defective products. The existing detection technology cannot detect foreign matter between film materials, and multiple layers of film materials block small foreign matter and cannot be presented. Surface-level detection cannot find internal defects. Main problem points: foreign matter between backlight film materials is blocked by multiple layers of film materials and cannot be presented; small foreign matter (<0.3mm) is difficult to be recognized by the optical system; internal structural defects cannot be found by surface detection; the miss detection rate is as high as 15-20%, which affects the quality of finished products. Therefore, a backlight pressing test machine is proposed. SUMMARY

[0003] The purpose of the present application is to provide a backlight pressing test machine to solve the problems raised in the background art.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a backlight pressing test machine, comprising a backlight carrier, a detection positioning groove is arranged on the upper surface of the backlight carrier, an LED detection piece is installed in the detection positioning groove, a dismounting groove is arranged on both sides of the detection positioning groove, and a wire connecting end is fixedly connected to one side of the LED detection piece.

[0005] Preferably, a backboard is fixedly connected to the side wall of the backboard, an electric cylinder is fixedly connected to the side wall of the backboard, an electric pressure rod is fixedly connected to the lower end of the electric cylinder, a pressure plate supporting assembly is fixedly connected to the bottom of the electric pressure rod, the pressure plate supporting assembly is specifically in a U shape, a transparent pressure plate is installed in the pressure plate supporting assembly, a power supply pressure head is fixedly connected to the bottom of the pressure plate supporting assembly, the power supply pressure head corresponds to the wire connecting end, and the transparent pressure plate corresponds to the LED detection piece.

[0006] Preferably, a sliding groove is arranged in the pressure plate supporting assembly, and the transparent pressure plate is specifically connected in the sliding groove in a sliding manner.

[0007] Preferably, the LED detection piece is specifically formed by stacking and combining a brightness enhancement film, a prism film, a diffusion film, a light guide plate, and a reflective film.

[0008] The technical effect and advantage of the present application: solve the problem of foreign matter imaging: extrude the foreign matter between the film materials by mechanical pressure to solve the detection blind area caused by the shielding of multi-layer film materials; solve internal defect detection: detect the abnormal internal structure of the backlight module through pressure change; solve the problem of missed detection quality: the foreign matter in the film material is effectively detected, and the quality of the backlight finished product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a schematic diagram of the test machine structure of the present application. Figure 2 It is a front view of the test machine of the present application. Figure 3 It is a side view of the test machine of the present application. Figure 4 It is a sectional view of the test machine of the present application. Figure 5 It is a bottom view of the test machine pressing plate support assembly of the present application. Figure 6 It is a schematic diagram of the backlight carrier structure of the present application.

[0010] In the figure: 101, back plate; 102, backlight carrier; 103, detection positioning groove; 104, LED detection piece; 105, electric cylinder; 106, voltage rod; 107, pressing plate support assembly; 108, transparent pressing plate; 109, power head; 201, wire connection end. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0012] The present application provides a backlight pressing test machine as shown in Figures 1-6 The backlight pressing test machine comprises a backlight carrier 102. Specifically, the upper surface of the backlight carrier 102 is provided with a detection positioning groove 103, the detection positioning groove 103 is provided with a dismounting groove on both sides, and the LED detection piece 104 is fixedly connected with a wire connection end 201 on one side.

[0013] Specifically, the back plate 101 side wall is fixedly connected with the back plate 101, the back plate 101 side wall is fixedly connected with the electric cylinder 105, the lower end of the electric cylinder 105 is fixedly connected with the voltage rod 106, the bottom of the voltage rod 106 is fixedly connected with the pressure plate support assembly 107, the pressure plate support assembly 107 is specifically in a U shape, the pressure plate support assembly 107 is internally installed with the transparent pressure plate 108, the bottom of the pressure plate support assembly 107 is fixedly connected with the power supply pressure head 109, the power supply pressure head 109 corresponds to the wire connecting end 201, and the transparent pressure plate 108 corresponds to the LED detection piece 104.

[0014] Specifically, the pressure plate support assembly 107 is internally provided with a sliding groove, and the transparent pressure plate 108 is specifically slidably connected in the sliding groove.

[0015] Specifically, the LED detection piece 104 is specifically formed by stacking and combining a brightness enhancement film, a prism film, a diffusion film, a light guide plate and a reflective film.

[0016] Working principle: When the device is used, the LED detection piece 104 to be detected is placed in the detection positioning groove 103 above the backlight support table 102, the electric cylinder 105 is started, the electric cylinder 105 is powered and driven to drive the voltage rod 106 to drive the pressure plate support assembly 107 and the transparent pressure plate 108 to be pressed downward, when the transparent pressure plate 108 contacts the LED detection piece 104, the power supply pressure head 109 fixed at the lower end of the pressure plate support assembly 107 contacts the wire connecting end 201 on the LED detection piece 104, the LED detection piece 104 is powered and displayed through the power supply pressure head 109, meanwhile, the lower surface of the transparent pressure plate 108 extrudes the upper surface of the LED detection piece 104, and then the LED detection piece 104 is displayed, so that the defective piece is removed. The LED detection piece 104 is formed by stacking and combining a brightness enhancement film, a prism film, a diffusion film, a light guide plate and a reflective film. Due to factors such as a backlight production environment or process control, there are small particle impurities between the films, the films are non-transparent materials, the impurities are blocked by the films, and the impurities are difficult to be displayed. The surface of the LED detection piece 104 is pressed by the transparent pressure plate 108, the backlight support table 102 is upwardly reacted, the gap between the films is relatively small after extrusion, the particle impurities between the films are also extruded and pushed to the films, the films are damaged and white spots are displayed, so that the defective piece is detected and removed.

[0017] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A backlit press test machine comprising a backlit platen (102), characterized by: The backlight carrier (102) upper surface is equipped with detection positioning groove (103), the detection positioning groove (103) is installed with LED detection piece (104), the detection positioning groove (103) both sides are equipped with dismounting groove, the LED detection piece (104) one side is fixedly connected with wire connecting end (201).

2. The backlight press test machine of claim 1, wherein: The backboard (101) side wall is fixedly connected with backboard (101), the backboard (101) side wall is fixedly connected with electric cylinder (105), the electric cylinder (105) lower end is fixedly connected with voltage rod (106), the voltage rod (106) bottom is fixedly connected with presser plate support assembly (107), the presser plate support assembly (107) is specifically U-shaped, the presser plate support assembly (107) is installed with transparent presser plate (108), the presser plate support assembly (107) bottom is fixedly connected with power supply pressure head (109), the power supply pressure head (109) corresponds with wire connecting end (201), the transparent presser plate (108) corresponds with LED detection piece (104).

3. The backlight press test machine of claim 2, wherein: The presser plate support assembly (107) is equipped with sliding slot, the transparent presser plate (108) is specifically slidingly connected in sliding slot.

4. The backlight press test machine of claim 1, wherein: The LED detection piece (104) is specifically formed by the stack combination of brightness enhancement film, prism film, diffusion film, light guide plate and reflective film.

Images