CN209821546U - Detection device for liquid crystal display screen - Google Patents

Abstract

The utility model discloses a liquid crystal display detection device, which comprises a bracket, an L-shaped workbench arranged on the bracket, a backlight arranged on the side wall of the vertical end of the workbench, and two oppositely arranged horizontal ends of the workbench. The surface of the shading plate, the vertical end of the workbench and the top of the side wall facing the support are provided with a support block in the same direction as the length of the horizontal end, and the support is provided with a lift that drives the workbench to slide along its height direction. Assemblies, the support block is provided with an adjustment assembly that drives the two shading plates to approach or move away from each other, and a detection space is formed between the two shading plates for the light source of the backlight to pass through; the detection device can adjust the two shading plates The distance between the boards is suitable for LCD screens of different sizes, and the light is not directly irradiated to the eyes of the staff. The detection efficiency is high and the application range is wide.

Description

Liquid crystal display detection device

technical field

The utility model relates to the technical field of liquid crystal display detection, in particular to a liquid crystal display detection device.

Background technique

Liquid crystal display, abbreviated as LCD in English, is a kind of flat-panel display. It is used for the screen display of TVs and computers. The advantages of this display are low power consumption, small size, and low radiation. The liquid crystal solution in the sheet polarized material, when the current passes through the liquid, the crystals will be rearranged to achieve the purpose of imaging.

The assembly of liquid crystal display involves multiple processes. During the assembly process, it is necessary to inspect the liquid crystal display to determine whether the quality is qualified. The inspection of the liquid crystal display includes the inspection of its light transmission performance, whether there is point damage to the liquid crystal display, Linear damage, and the detection of foreign matter, etc., the current detection method for LCD screens is to use the backlight, and the staff can observe whether there are quality problems in the LCD screen.

However, there are the following limitations in the existing technical problems: due to the consistent size of the backlight, when the size of the liquid crystal display to be detected is smaller than the size of the backlight, the light emitted by the backlight directly shines on the eyes of the staff In fact, the staff needs to test hundreds of LCD screens every day, and the eyes of the staff are exposed to light for a long time, which will cause visual fatigue, which will affect the vision of the staff, affect the detection effect, and the detection efficiency is low. Small.

Utility model content

The purpose of this utility model is to provide a detection device for a liquid crystal display, which has the advantages that the detection device can adjust the irradiation area of the backlight light so as to adapt to liquid crystal display screens of different sizes, and avoid the light directly irradiating the eyes of the staff , high detection efficiency and wide application range.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions:

A detection device for a liquid crystal display, comprising a support, an L-shaped workbench arranged on the support for placing a liquid crystal display, a backlight arranged on the vertical end side wall of the workbench, and two oppositely arranged workbench levels. The shading plate on the upper surface of the end, the sum of the width dimensions of the two shading plates is consistent with the length dimension of the horizontal end of the workbench, and the height dimension of the two shading plates is consistent with the height dimension of the vertical end of the workbench. The vertical end and the top of the side wall facing the bracket are provided with a support block in the same direction as the length direction of the horizontal end. The support is provided with a lifting assembly that drives the workbench to slide along its height direction. The support block is provided with a drive The two shading plates are adjusted to be close to or far away from each other, and a detection space is formed between the two shading plates for the light source of the backlight to pass through.

Through the above technical scheme, firstly, the lifting component drives the workbench up and down to a suitable height, which is convenient for the staff to place the liquid crystal display to be tested on the workbench; secondly, the adjustment component is used to drive the two shading plates away from each other to a suitable position, so that the backlight The light source is transmitted through the detection space, and the staff can detect the LCD screen; the detection device composed of the above structure can adjust the distance between the two light-shielding plates to adapt to different sizes of LCD screens, and then control the The light source penetrates the irradiated area of the detection space, which can avoid the light source from directly irradiating the eyes of the staff, improves the detection efficiency, and has a wide range of applications.

The utility model is further configured as follows: the support includes a base and two rows of uprights facing each other on the upper surface of the base, and the ends of the uprights away from the base are respectively fixed on the lower surface of the horizontal end of the workbench.

Through the above technical solution, the bracket formed by the combination of the column and the base is used to support the workbench, which is convenient for the staff to detect the liquid crystal display screen and improves the detection efficiency.

The utility model is further configured as follows: the base is provided with a cavity, the lifting assembly includes a first motor arranged on the upper surface of the base, a first toothed disc arranged on the base at the axis of the bottom wall in the cavity, Rotate the second toothed plate located at the four corners of the bottom wall of the cavity on the base, the third toothed plate meshed with the first toothed plate and the second toothed plate respectively, and the screw arranged at the axis center of the upper surface of the second toothed plate, the The drive shaft of the first motor extends into the cavity and is fixedly connected to the axis of the first toothed disc, the end of the screw rod away from the second toothed disc extends out of the upper surface of the base, and the lower surface of the column is provided with A threaded groove that mates with the screw thread.

Through the above technical solution, the first motor is used to drive the first toothed disc to rotate, to drive the third toothed disc to rotate, and then to drive the four second toothed discs to rotate, thereby driving the screw to rotate. Since the thread groove cooperates with the thread of the screw, the column moves along the screw. It slides up and down in the length direction of the workbench, and finally realizes the adjustment of the workbench to a suitable height to suit the height of the staff, which is convenient for the staff to place the LCD screen on the workbench and detect it, improving the detection efficiency .

The utility model is further configured as follows: the lower surface of the support block is provided with a first chute along its length direction, and the adjustment assembly includes a screw rod that is rotated and arranged in the first chute, and is threadedly matched with both ends of the screw rod. The slider nut and the second motor arranged on the end wall of the support block, the drive shaft of the second motor extends into the first chute and is fixedly connected with one end of the screw rod, and the other end of the screw rod is connected with the first The groove wall of the chute is rotatably connected, the two ends of the screw rod are set as reverse threads, the two slider nuts are close to each other or far away from each other along the length direction of the screw rod, and the upper surfaces of the two light shielding plates are respectively connected to the two The upper surface of a slider nut is fixedly connected.

Through the above technical scheme, the second motor is used to drive the screw to rotate, since the first chute acts as a limiter for the slider nut, and the two ends of the screw are set as reverse threads, and then the two slider nuts move along the screw. The length directions of the two shading plates are close to each other or far away from each other, so that the two shading plates are close to each other or far away from each other to a suitable position, so as to adapt to different sizes of LCD screens, and finally realize the adjustment of the irradiation area of the backlight light source, which can avoid direct light source The eyes of the staff are irradiated, the detection efficiency is improved, and the application range is wide.

The utility model is further configured as follows: the upper surface of the horizontal end of the workbench is provided with two opposite second slide grooves along its length direction, and the lower surfaces of the two light-shielding plates are respectively provided with sliding grooves in the second slide grooves. Slide block.

Through the above technical solution, the cooperation between the second chute and the sliding block improves the stability during the sliding of the two shading plates.

The utility model is further set as follows: the side wall of the sliding block is provided with two opposite elastic projections, and the groove wall adjacent to the second chute and its notch is provided with a card slot matched with the elastic projections .

Through the above technical solution, when the two shading plates are far away from each other to the farthest distance, the two elastic protrusions are inserted into the card slots, so that the shading plates are stable on the workbench; the cooperation between the elastic protrusions and the card slots, A visor plays the role of positioning.

The utility model is further configured as follows: the opposite side walls of the two slider nuts are provided with distance sensors, and the distance sensors are electrically connected to the second motor.

Through the above technical solution, the distance sensor can be used to detect the distance value between the two shading plates in real time. When the distance value reaches the set value, a signal is sent to the PLC control circuit immediately, and the second motor stops working, so that the light source of the backlight can be turned on. By passing through the detection space, the staff can detect the liquid crystal display screen, realize the automatic work, and improve the detection efficiency.

The utility model is further configured as follows: a touch display screen is provided on the side wall of the horizontal end of the workbench, and the touch display screen is respectively electrically connected to the distance sensor and the second motor.

Through the above technical solution, using the touch screen, the staff can input the length of the LCD screen into the PLC control circuit, and then the distance sensor receives the signal, and the second motor works. When the distance value between the two light shields reaches the set value When the value is set, the second motor stops working, which realizes automatic work, facilitates operation, improves detection efficiency, and prevents the light from directly shining on the eyes of the staff.

In summary, the utility model has the following beneficial effects:

1. First, the lifting component drives the workbench up and down to a suitable height, which is convenient for the staff to place the liquid crystal display to be tested on the workbench; secondly, the adjustment component is used to drive the two shading plates away from each other to a suitable position, so that the light source of the backlight passes through The detection space passes through, and the staff can detect the LCD screen; the detection device composed of the above structure can adjust the distance between the two shading plates to adapt to different sizes of LCD screens, and then control the light source through the injection. The irradiated area of the detection space can avoid the light source directly irradiating the eyes of the staff, which improves the detection efficiency and has a wide range of applications;

2. Use the second motor to drive the screw to rotate. Since the first chute acts as a limiter for the slider nut, and the two ends of the screw are set as reverse threads, the two slider nuts are aligned along the length of the screw. Close to or far away from each other, so that the two shading plates are close to each other or far away from each other to a suitable position to adapt to different sizes of LCD screens, and finally realize the adjustment of the irradiation area of the backlight light source, which can avoid the light source from directly illuminating the staff eyes, which improves the detection efficiency and has a wide range of applications;

3. The distance sensor can be used to detect the distance value between the two shading plates in real time. When the distance value reaches the set value, a signal is sent to the PLC control circuit immediately, and the second motor stops working, so that the light source of the backlight can pass through the detection space The passing through allows the staff to detect the LCD screen, realizes the automation work, and improves the detection efficiency.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of this embodiment.

Fig. 2 is a schematic structural diagram for embodying the lifting assembly in this embodiment.

Fig. 3 is a schematic structural diagram for embodying the adjustment assembly in this embodiment.

Fig. 4 is a structural schematic diagram for illustrating the positional relationship between the slot and the elastic protrusion in this embodiment.

Reference signs: 1, bracket; 101, base; 102, column; 2, workbench; 3, backlight; 4, shading plate; 5, support block; 6, lifting assembly; 61, first motor; 62, second 1st toothed plate; 63, second toothed plate; 64, third toothed plate; 65, screw rod; 7, adjustment assembly; 71, screw rod; 72, slider nut; 73, second motor; , cavity; 10, thread groove; 11, first chute; 12, second chute; 13, sliding block; 14, elastic bump; 15, card slot; 16, distance sensor; 17, touch screen .

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Example:

A detection device for a liquid crystal display, referring to Fig. 1, comprising a bracket 1, on which an L-shaped workbench 2 is arranged, the upper surface of the horizontal end of the workbench 2 is used to place a liquid crystal display, and the vertical end of the workbench 2 The side wall of the straight end facing its horizontal end is provided with a backlight 3, and the backlight 3 is evenly distributed along the length direction of the vertical end of the workbench 2; the liquid crystal display is placed on the upper surface of the horizontal end of the workbench 2, and the backlight 3 is turned on , at this moment, the light source of the backlight 3 is irradiated on the liquid crystal display screen, and the liquid crystal display screen can be detected.

Referring to Fig. 1, the horizontal end of the workbench 2 is provided with two opposite shading plates 4 near the upper surface of its vertical end, the sum of the length dimensions of the two shading plates 4 is consistent with the length dimension of the horizontal end of the workbench 2, and the two shading plates 4 are consistent with the length dimension of the horizontal end of the workbench 2. The height dimension of the plate 4 is consistent with the height dimension of the vertical end of the workbench 2, and the vertical end of the workbench 2 is extended toward the top side wall of its horizontal end to be provided with a support block 5, and the support block 5 is parallel to the horizontal end of the workbench 2 and its length In the same direction, the bracket 1 is provided with a lift assembly 6 that drives the workbench 2 to slide along its height direction, and the support block 5 is provided with an adjustment assembly 7 that drives the two shading plates 4 to approach or move away from each other, and the two shading plates 4 There is a detection space 8 useful for the light source of the backlight 3 to pass through; firstly, the lifting assembly 6 is used to drive the workbench 2 to move up and down to a suitable height, so that the staff can place the liquid crystal display on the workbench 2 for detection; secondly, use The adjustment assembly 7 drives the two shading plates 4 to approach or move away from each other, so that the light source of the backlight 3 passes through the detection space 8, which is convenient for the staff to detect the liquid crystal display screen; the detection device composed of the above structure can control the backlight The irradiated area of the lamp 3 light source is suitable for LCD screens of different sizes, avoiding the light directly irradiating the eyes of the staff, with high detection efficiency and wide application range.

With reference to Fig. 1, support 1 comprises base 101 and is arranged on the column 102 of four corners on the upper surface of base 101, and the shape of base 101 is square, and one end of column 102 away from base 101 is respectively fixed on the lower surface of workbench 2 horizontal ends; Base 101 and column The cooperation of 102 is used to support the workbench 2, which is convenient for the staff to detect the liquid crystal display.

Referring to Fig. 2, a cavity 9 is provided in the base 101, and the lifting assembly 6 includes a first motor 61 arranged at the center of the upper surface of the base 101, and a first tooth set at the center of the bottom wall of the cavity 9 where the base 101 is rotated. The disc 62, the second toothed disc 63 that is rotatably disposed on the base 101 at the four corners of the inner bottom wall of the cavity 9, the four third toothed discs 64 that are rotatably disposed on the base 101 that is located on the inner wall of the cavity 9, and the second toothed disc 63 that is disposed on the inner wall of the cavity 9 The screw rod 65 at the axis, the third toothed disc 64 meshes with the first toothed disc 62 and the second toothed disc 63 respectively, the third toothed disc 64 is located between the first toothed disc 62 and the second toothed disc 63, the first toothed disc 64 The drive shaft of the motor 61 extends into the cavity 9 and is fixedly connected to the axis of the upper surface of the first toothed disc 62 , the end of the screw 65 away from the second toothed disc 63 extends out of the upper surface of the base 101 , and the lower surface of the column 102 A screw groove 10 threaded with the screw 65 is provided, and the diameter of the third toothed disc 64 is greater than the diameter of the first toothed disc 62 and the diameter of the second toothed disc 63; A motor 61 drives the first toothed disc 62 to rotate, and then drives the four third toothed discs 64 to rotate, and then drives the four second toothed discs 63 to rotate, thereby driving the screw rod 65 to rotate, because the threaded groove 10 is threadedly matched with the screw rod 65, so that The upright column 102 moves up and down along the length direction of the screw rod 65, and finally realizes that the workbench 2 moves to an appropriate height, which is convenient for the staff to place the liquid crystal display on the workbench 2 for detection, and can be adapted to the height and size of different staff, making the workbench 2 move to a suitable height. Personnel can perform detection more comfortably, and the application range is wide.

Referring to Fig. 1 and Fig. 3, the lower surface of the support block 5 is provided with a first chute 11 along its length direction, and the adjustment assembly 7 includes a screw 71 which is rotatably arranged in the first chute 11, and the two ends of the screw 71 The threaded slider nut 72 and the second motor 73 arranged on the end wall of the support block 5, the two ends of the screw mandrel 71 are set as reverse threads, and the length direction of the screw mandrel 71 is the same as that of the first chute 11. Towards, the drive shaft of the second motor 73 extends into the first chute 11 and is fixedly connected with one end of the screw mandrel 71, and the other end of the screw mandrel 71 is rotationally connected with the groove wall of the first chute 11, and the two ends of the screw mandrel 71 Set as reverse thread, the two slider nuts 72 approach or move away from each other along the length direction of the screw mandrel 71, and the upper surfaces of the two light shields 4 are fixedly connected with the upper surfaces of the two slider nuts 72 respectively; The motor 73 drives the screw rod 71 to rotate. Since the first chute 11 acts as a limiter for the slider nut 72, the slider nuts 72 approach or move away from each other along the length direction of the screw rod 71, thereby realizing two shading plates. 4 away from each other to a suitable position, so that the light source of the backlight 3 passes through the detection space 8, and the staff can detect the liquid crystal display screen; the adjustment method of the above structure can be used to adjust the irradiation area of the light source of the backlight 3, so as to Compatible with LCD screens of different sizes, it can avoid the light source from directly shining on the eyes of the staff, with high detection efficiency and wide application range.

Referring to Fig. 3, the upper surface of the horizontal end of the workbench 2 is provided with two opposite second slide grooves 12 along its length direction, and the lower surfaces of the two light-shielding plates 4 are provided with sliding blocks 13, and the sliding blocks 13 are arranged along the second chute. The chute 12 slides in the length direction; the cooperation between the second chute 12 and the sliding block 13 improves the stability of the two shading plates 4 in the sliding process.

Referring to Fig. 3 and Fig. 4, the two side walls of the two sliding blocks 13 are all provided with elastic projections 14, and the two groove walls adjacent to the second chute 12 and its notch are all provided with elastic projections 14 Matching slot 15, the slot 15 is arranged on the groove wall of the second chute 12 close to the side wall of the workbench 2; the two light-shielding plates 4 are far away from each other, and the elastic protrusion 14 is stuck in the slot 15 at this time; The cooperation between the locking groove 15 and the elastic protrusion 14 plays a position-limiting role on the two light-shielding plates 4 and improves the stability of the light-shielding plates 4 .

Referring to Fig. 3, distance sensors 16 are provided on the opposite side walls of the two slider nuts 72, and the distance sensors 16 are electrically connected to the second motor 73; When the distance value reaches the set value, a signal is sent to the PLC control circuit immediately, and the second motor 73 stops working, finally realizing the adjustment of the distance between the two shading plates 4 and realizing automatic work to adapt to liquid crystal displays of different sizes Screen, to avoid the direct light of the staff's eyes, high detection efficiency, wide range of applications.

With reference to Fig. 1 and Fig. 3, the horizontal end of workbench 2 is provided with touch display screen 17 on the side wall away from shade plate 4, and touch display screen 17 is electrically connected with distance sensor 16, second motor 73 respectively; 17. The staff can input the length of the liquid crystal display into the PLC control circuit, and then the distance sensor 16 receives the signal, and the second motor 73 works. When the distance value between the two light shields 4 reaches the set value, the second Motor 73 stops working, has realized automatic work, is convenient to operate, has improved detection efficiency, and can avoid the eyes of the staff that the light source directs.

The working principle of the utility model is as follows: firstly, the first motor 61 is used to drive the first toothed disc 62 to rotate, to drive the third toothed disc 64 to rotate, and then to drive the second toothed disc 63 to rotate, thereby driving the screw rod 65 to rotate, so that the column 102 rotates along the screw rod 65 moves up and down in the length direction, and finally realizes that the workbench 2 moves to a suitable height, and the staff can place the liquid crystal display to be detected on the workbench 2; secondly, using the touch screen 17, the staff inputs the length dimension of the touch screen 17 In the PLC control circuit, the distance sensor 16 is used to detect the distance between the two shading plates 4 in real time, and the second motor 73 works to drive the screw mandrel 71 to rotate, and then the two shading plates 4 are close to each other or mutually along the length direction of the screw mandrel 71. Far away, when the distance value reaches the set value, the second motor 73 stops working, the light source of the backlight 3 passes through the detection space 8, and the staff can detect the LCD screen, which can be adapted to LCD screens of different sizes. It can avoid the light source from directly irradiating the eyes of the staff.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. After reading this description, those skilled in the art can make modifications to the embodiment without creative contribution according to needs, but as long as it is within the utility model All new claims are protected by patent law.

Claims (8)

1. a detection device of a liquid crystal display, is characterized in that: comprise support (1), be arranged on the support (1) and be used to place the workbench (2) that is L-shaped of liquid crystal display on support (1), be arranged on workbench ( 2) The backlight (3) on the side wall of the vertical end and the shading plate (4) on the upper surface of the horizontal end of the two oppositely arranged workbenches (2), the sum of the width dimensions of the two shading plates (4) and the workbench (2) The length dimension of the horizontal end is consistent, and the height dimension of the two shading plates (4) is consistent with the height dimension of the vertical end of the workbench (2), and the vertical end of the workbench (2) faces the support (1 ) on the top of the side wall is provided with a support block (5) in the same direction as the length direction of its horizontal end, and the support (1) is provided with a lifting assembly (6) that drives the workbench (2) to slide along its height direction. The supporting block (5) is provided with an adjustment component (7) that drives the two shading plates (4) to approach or move away from each other, and a light source for the backlight (3) passes through between the two shading plates (4). detection space (8). 2. The liquid crystal display detection device according to claim 1, characterized in that: the support (1) comprises a base (101) and two rows of columns (102) opposite to each other arranged on the upper surface of the base (101) One end of the column (102) away from the base (101) is respectively fixed on the lower surface of the horizontal end of the workbench (2). 3. The liquid crystal display detection device according to claim 2, characterized in that: the base (101) is provided with a cavity (9), and the lifting assembly (6) includes a The first motor (61) on the surface, the first toothed disc (62) that is arranged on the base (101) at the axis of the inner bottom wall of the cavity (9) is rotated, and the rotation is arranged on the base (101) and is located at the cavity (9). The second toothed disc (63) at the four corners of the inner bottom wall, several third toothed discs (64) meshed with the first toothed disc (62) and the second toothed disc (63) respectively, and the second toothed disc (63) The screw rod (65) at the axis of the upper surface, the drive shaft of the first motor (61) extends into the cavity (9) and is fixedly connected with the axis of the first toothed disc (62), the screw ( 65) The end away from the second toothed disc (63) extends out of the upper surface of the base (101), and the lower surface of the column (102) is provided with a threaded groove (10) threaded with the screw rod (65). 4. The detection device of liquid crystal display according to claim 1, characterized in that: the lower surface of the support block (5) is provided with a first chute (11) along its length direction, and the adjustment assembly (7 ) comprises rotating the screw rod (71) that is arranged in the first chute (11), the slider nut (72) that is screwed with the two ends of the screw rod (71) and the screw nut (72) that is arranged on the end wall of the support block (5) The second motor (73), the drive shaft of the second motor (73) extends into the first chute (11) and is fixedly connected with one end of the screw mandrel (71), and the other end of the screw mandrel (71) is connected with the screw mandrel (71). The groove walls of the first chute (11) are rotatably connected, and the two slider nuts (72) approach or move away from each other along the length direction of the screw mandrel (71), and the upper surfaces of the two light-shielding plates (4) are respectively connected to each other. The upper surfaces of the two slider nuts (72) are fixedly connected. 5. The detection device of liquid crystal display according to claim 4, characterized in that: the upper surface of the horizontal end of the workbench (2) is provided with two opposite second slide grooves (12) along its length direction, and the two Sliding blocks (13) sliding in the second slide grooves (12) are respectively provided on the lower surface of the light shielding plate (4). 6. The detection device of liquid crystal display according to claim 5, characterized in that: two opposite elastic bumps (14) are arranged on the side wall of the sliding block (13), and the second slide groove (12) The groove wall adjacent to the groove opening is provided with a card groove (15) matched with the elastic protrusion (14). 7. the detecting device of liquid crystal display screen according to claim 4, is characterized in that: the opposite side wall of two described slider nuts (72) is provided with distance sensor (16), and described distance sensor (16) and the first The two motors (73) are electrically connected. 8. The detection device of liquid crystal display according to claim 7, characterized in that: a touch screen (17) is provided on the horizontal end side wall of the workbench (2), and the touch screen (17) They are respectively electrically connected to the distance sensor (16) and the second motor (73).