WO2020019584A1

WO2020019584A1 - Light-blocking mechanism for testing light box

Info

Publication number: WO2020019584A1
Application number: PCT/CN2018/115758
Authority: WO
Inventors: 鲁周波
Original assignee: 鲁周波
Priority date: 2018-07-25
Filing date: 2018-11-15
Publication date: 2020-01-30
Also published as: CN109445136A; CN108826225A; CN209343075U

Abstract

Provided is a light-blocking mechanism for a testing light box, mainly comprising a light-blocking cloth (1) and a driving device (2). The light-blocking cloth (1) is provided with a light-blocking region (11) and one or more light-transmitting regions (12). The driving device (2) is used to drive movement of the light-blocking cloth (1) and to realize switching of the light-transmitting regions (12). When the testing light box is used to test products with different model numbers, the light-blocking mechanism drives the light-blocking cloth (1) internally provided in the light box, so as to realize switching between different light-transmitting regions (12), thereby achieving the goal of using one testing light box to test products with different model numbers. The testing light box has a simple structure, is easy to operate, and can effectively reduce the likelihood of light leakage during a test, and accordingly increase the accuracy of a test result.

Description

Shading mechanism of test light box

Technical field

The invention relates to the field of testing equipment, and in particular, to a light-shielding mechanism for a test light box.

Background technique

With the economic development and the improvement of people's living standards, the role of various types of liquid crystal application products in the production of national economy and people's social life has become more and more important. The liquid crystal application products have become increasingly diversified and popularized. In the process, in order to improve the versatility and cost-effectiveness of the product, it is necessary to test the optical characteristics of the liquid crystal panel. During the test, a light-emitting light box is usually used instead of the backlight module in the liquid crystal display. Due to the increasing size of liquid crystal panels, in actual production, a test device is often required to test multiple liquid crystal panel models.

When a large-sized test device tests a small-sized LCD panel, the light-emitting area of the test light box that interferes with the optical detection instrument needs to be shielded. At present, the light-shielding mechanism composed of a light-shielding cloth, a slide rail and a screw rod is generally used in actual production. Blocking is performed in this way to block the light box from three directions, but this type of blocking method is prone to light leakage and affects the test results. The structure of the blocking mechanism is complicated and the operation is troublesome.

Summary of the Invention

An object of the present invention is to provide a light shielding mechanism for a test light box, which can solve the technical problems of the prior art.

According to one aspect of the present invention, a light-shielding mechanism for a test light box is provided, which includes a driving device and a light-shielding cloth. The light-shielding cloth is provided with a light-shielding area and more than one light-transmitting area. The driving device is used to drive the movement of the light-shielding cloth to realize Switching of transparent areas.

The light-shielding area of the present invention refers to a part of the light-shielding cloth that cannot pass light, which can effectively prevent light leakage. The light-transmitting area refers to an area where light can pass and be tested. A light-transmitting area corresponds to a product that needs to be tested. Model size.

The beneficial effect is that: the light-shielding cloth is provided with a light-shielding zone and more than one kind of light-transmitting zones, and the light-shielding cloth is driven by the driving device to realize the switching of the light-transmitting zones. The invention has a simple structure, convenient operation, complete light-shielding areas, and avoids The situation of multi-direction common shading reduces the possibility of light leakage during the test process, improves the test accuracy, and simultaneously meets the actual production requirements of a test light box that can test many different types of products.

In some embodiments, the driving device includes a first roller, a second roller, a first motor, and a second motor. A light source unit is provided in the test light box. The first roller is fixed on one side of the light source unit and the second roller is fixed. On the other side of the light source unit, the first roller and the second roller are arranged in parallel, the shading cloth is wound on the first roller and the second roller, the first motor is connected to the first roller, and the second motor is connected to The second roller is connected. Since the light-shielding cloth is wound on the first and second rollers, when the first and second motors drive the two rollers to move at the same speed and in the same direction, the light-shielding cloth also moves with it, so that the light-transmitting area is changed to achieve The purpose of measuring multiple models of products on the same test light box, and the structure of the shading mechanism is simple, easy to operate, and not easy to leak light.

In some embodiments, the driving device includes a third roller, a fourth roller, and a third motor. A light source unit is provided in the test light box. The light source unit is suspended and fixed inside the light box, and the third roller is fixed on one side of the light source unit. The four rollers are fixed on the other side of the light source unit, the third roller and the fourth roller are arranged in parallel, the shading cloth is connected end to end, and the sides are ring-shaped, wound on the third roller and the fourth roller, and the light source unit It is placed in the ring intermediate position, and the third motor is connected to the third roller side. Because the motor drives the two rollers to be synchronously driven, the shading cloth moves cyclically with the rollers to drive the light-transmitting area to change accordingly. The purpose of measuring multiple models of the same test light box is simple, and the structure is highly reliable.

In some embodiments, the driving device includes a first rack, a second rack, a first gear, a second gear, a third gear, a fourth gear, a fourth motor, and a fifth motor, the first rack and the second The racks are respectively arranged under the shading cloth and fixedly connected to the shading cloth. The first rack and the second rack are arranged in parallel. A light source unit is provided in the test light box. The first gear and the third gear are installed on one side of the light source unit. And the distance between them is equal to the distance between the first rack and the second rack, the second gear and the fourth gear are installed on the other side of the light source unit, and the distance between them is equal to the first rack and the first The distance between the two racks, the fourth motor is connected to the first gear, and the fifth motor is connected to the second gear. Because the motor drives the gear to run, the gear drives the rack to run, and the shading cloth on the rack moves with it, to achieve the switching of the light transmission area, to achieve the purpose of measuring multiple models of products with the same test light box. The structure is simple and easy to operate.

In some embodiments, several sets of lifting units are provided outside the light source unit. The lifting unit includes a lifting element, a lifting rod, and a guide rail. The lifting element is provided along the outer periphery of the light source unit. The lifting rod is provided above the light source unit and is connected to the guide rail. Connected, under the action of the jacking element, the lifting rod can make vertical movement along the guide rail. Because the lifting element drives the lifting rod to move vertically along the guide rail, when the lifting rod moves to the top of the guide rail, the shading cloth directly contacts the optical glass on the surface of the light box, and there is no gap between the shading cloth and the optical glass on the surface of the light box, which makes it difficult to cause light leakage and improves the test. Precision.

In some embodiments, the jacking element is an air cylinder. When the driving device drives the shading cloth to complete the movement and the light transmission area is adjusted to a suitable position, the air cylinder drives the lifting rod to rise, so that the shading cloth can directly contact the surface of the light box, eliminating both The gap between them reduces the possibility of light leakage and improves test accuracy.

In some embodiments, the light-shielding cloth is an optical composite film, and the light-shielding area is spray-painted with an opaque material. Because the light-shielding area is spray-painted with opaque materials, the light-shielding area is complete and the light-shielding effect is good. The light-shielding cloth is an optical composite film as a whole. One test light box can test many different types of products, and it can reduce the possibility of light leakage and improve the test accuracy.

In addition, in the technical solutions described in the present invention, unless otherwise specified, the technical solutions can be implemented by using conventional means in the art.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a top view of a schematic structural diagram of a shading mechanism of a test lamp box according to a first embodiment of the present invention.

FIG. 2 is a left side view of a schematic structural diagram of a shading mechanism of a test light box according to the first embodiment of the present invention.

FIG. 3 is a top view of a schematic structural diagram of a shading mechanism of a test light box according to a second embodiment of the present invention.

FIG. 4 is a left side view of a schematic structural diagram of a shading mechanism of a test light box according to a second embodiment of the present invention.

FIG. 5 is a top view of a schematic structural diagram of a shading mechanism of a test light box according to a third embodiment of the present invention.

FIG. 6 is a right side view of a cross section of a light blocking mechanism of a test light box according to a third embodiment of the present invention.

FIG. 7 is a left side view in section of a light blocking mechanism of a test light box according to a third embodiment of the present invention.

detailed description

The present invention is described in further detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

Embodiment one:

A light-shielding mechanism for a test light box, as shown in FIGS. 1 and 2, includes a light-shielding cloth 1 and a driving device 2, and a light source unit 3 is provided in the test-light box. A light-shielding area 11 is provided on the light-shielding cloth 1 and a The above light-transmitting area 12 and the light-shielding cloth 1 can be selected from tensile optical composite film with excellent light transmission. On the light-shielding cloth 1, the light-shielding area 11 is painted with opaque materials such as black ink. Each of the plurality of light-transmitting regions 12 corresponds to a product size of a model.

The driving device 2 includes a first roller 211, a second roller 212, a first motor 213, and a second motor 214. The first roller 211 is fixed on one side of the light source unit 3, and the second roller 212 is fixed on the light source unit 3. On one side, the first roller 211 and the second roller 212 are parallel. The shading cloth 1 is fixed on the first roller 211 on one side and the second roller 212 on the other side, and the middle portion is wound on the first roller The first motor 213 is connected to one end of the first roller 211, and the second motor 214 is connected to one end of the second roller.

When testing the product, the driving device 2 is started. The first motor 213 and the second motor 214 respectively drive the first roller 211 and the second roller 212 to move in the same direction. When the light-transmitting area 12 on the light-shielding cloth 1 and the measured When the models match, stop drive 2 and test. The light-shielding mechanism has a simple structure and convenient operation, and reduces the possibility of light leakage.

Further, two sets of lifting units 4 are provided on the outside of the light source unit 3, one set is provided between the light source unit 3 and the first roller 211, and the other set is provided between the light source unit 3 and the second roller 212 The lifting unit 4 includes a lifting element 41, a lifting rod 42 and a guide rail 43, the lifting element 41 is disposed on a side close to the light source unit 3, the lifting rod 42 is disposed above the lifting element 41, and the lifting rod 42 is connected to the guide rail 43, When the jacking unit is activated, the lifting rod 42 can move vertically along the guide rail 43.

Further, the lifting element 1 may use a cylinder.

The number of jacking units 4 can be adjusted accordingly according to the actual situation. When the driving device 2 drives the shading cloth 1 to complete the movement, and the light-transmitting area 12 is adjusted to a proper position, the lifting member 42 drives the lifting rod 42 to move vertically along the guide rail 43. When the lifting lever 42 moves to the top of the guide 43, the shading cloth 1 It is in direct contact with the optical glass on the surface of the light box. There is no gap between the shading cloth 1 and the optical glass on the surface of the light box. It is not easy to cause light leakage, which can improve the test accuracy.

Embodiment two:

A light-shielding mechanism for a test light box, as shown in FIGS. 3 to 4. The light-shielding mechanism includes a light-shielding cloth 1 and a driving device 2. At the same time, a light source unit 3 is provided in the test-light box. The above light-transmitting area 12 and the light-shielding cloth 1 can be selected from tensile optical composite film with excellent light transmission. On the light-shielding cloth 1, the light-shielding area 11 is painted with opaque materials such as black ink. Each of the plurality of light-transmitting regions 12 corresponds to a product size of a model.

The driving device 2 includes a third roller 221, a fourth roller 222, and a third motor 223. The third roller 221 is fixed on one side of the light source unit 3, the fourth roller 222 is fixed on the other side of the light source unit 3, and the third The roller 221 and the fourth roller 222 are arranged in parallel, the light-shielding cloth 1 is closed at the end, and the sides are ring-shaped, and are wound around the third roller 221 and the fourth roller 222. At this time, the light source unit 3 is placed in the middle of the ring. In position, the third motor 223 is connected to one end of the third roller 221.

When testing the product, the driving device 2 is started, and the third motor 223 drives the third roller 221 and the fourth roller 222 to move at the same speed and in the same direction. When the light-transmitting area 12 on the light-shielding cloth 1 is consistent with the tested model, The test can be performed by stopping the driving device 2. The light-shielding mechanism has a simple structure and convenient operation, which reduces the possibility of light leakage and improves test accuracy.

Embodiment three:

A light-shielding mechanism for a test light box, as shown in FIGS. 5 to 7. The light-shielding mechanism includes a light-shielding cloth 1 and a driving device 2. At the same time, a light source unit 3 is provided in the test-light box, and a light-shielding area 11 is provided on the light-shielding cloth 1. The above light-transmitting area 12 and the light-shielding cloth 1 can be selected from tensile optical composite film with excellent light transmission. On the light-shielding cloth 1, the light-shielding area 11 is painted with opaque materials such as black ink. Each of the plurality of light-transmitting regions 12 corresponds to a product size of a model.

The driving device 2 includes a first rack 231, a second rack 232, a first gear 233, a second gear 234, a third gear 235, a fourth gear 236, a fourth motor 237, and a fifth motor 238. The first rack 231 and the second rack 232 are respectively disposed on the back of the light-shielding cloth 1 and are fixedly connected to the two sides of the light-shielding cloth 1. The first rack 231 and the second rack 232 are arranged in parallel, and the first gear 233 and the third gear 235 mesh. On the first rack 231, the second gear 234 and the fourth gear 236 mesh with the second rack 232, the first gear 233 and the third gear 235 are installed on one side of the light source unit 3, and the first gear 233 and the third The distance between the gears 235 is equal to the distance between the first rack 231 and the second rack 232. The second gear 234 and the fourth gear 236 are installed on the other side of the light source unit 3, and the second gear 234 and the fourth The distance between the gears 236 is equal to the distance between the first rack 231 and the second rack 232. The fourth motor 237 is connected to the first gear 233, and the fifth motor 238 is connected to the second gear 234.

When testing the product, the driving device 2 is started. The fourth motor 237 and the fifth motor 238 drive the first gear 233 and the second gear 234 to move, and the first rack 231 and the second rack 232 meshing therewith move accordingly, and block light. The light-transmitting area 12 on the cloth 1 is changed accordingly, thereby realizing the purpose that one test light box can test multiple types of products. This mechanism has a simple structure and convenient operation.

What has been described above are only some embodiments of the invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention.

Claims

The light-shielding mechanism of the test light box is characterized by comprising a light-shielding cloth (1) and a driving device (2), wherein the light-shielding cloth (1) is provided with a light-shielding area (11) and more than one light-transmitting area (12), The driving device (2) is used to drive the light-shielding cloth (1) to move to realize the switching of the light-transmitting area (12).
The light-shielding mechanism of a test light box according to claim 1, wherein the driving device (2) comprises a first roller (211), a second roller (212), a first motor (213), and a second A motor (214), a light source unit (3) is provided in the test light box, the first roller (211) is fixed on one side of the light source unit (3), and the second roller (212) is fixed on the light source On the other side of the unit (3), the first roller (211) and the second roller (212) are arranged in parallel, and the shading cloth (1) is wound around the first roller (211) and On the second roller (212), the first motor (213) is connected to the first roller (211), and the second motor (214) and the second roller (212)相连接。 Phase connection.
The light-shielding mechanism of a test light box according to claim 1, wherein the driving device (2) comprises a third roller (221), a fourth roller (222), and a third motor (223), and the test light box A light source unit (3) is arranged in the light source unit, the light source unit (3) is suspended and fixed inside the light box, the third roller (221) is fixed on one side of the light source unit (3), and the fourth roller (222) ) Is fixed on the other side of the light source unit (3), the third roller (221) and the fourth roller (222) are arranged in parallel, and the light-shielding cloth (1) is ring-shaped at the side where the ends meet. Wound on the third roller (221) and the fourth roller (222), the light source unit (3) is placed in a circular intermediate position, and the third motor (223) is connected to the first roller Three rollers (221) side.
The light-shielding mechanism of the test light box according to claim 1, wherein the driving device (2) comprises a first rack (231), a second rack (232), a first gear (233), and a second A gear (234), a third gear (235), a fourth gear (236), a fourth motor (237), and a fifth motor (238), the first rack (231) and the second rack ( 232) are respectively arranged under the light-shielding cloth (1) and fixedly connected to the light-shielding cloth (1); the first rack (231) and the second rack (232) are arranged in parallel; the test light box There is a light source unit (3), the first gear (233) and the third gear (235) are installed on one side of the light source unit (3), and the first gear (233) and the The distance between the third gear (235) is equal to the distance between the first rack (231) and the second rack (232), and the second gear (234) and the fourth gear ( 236) is installed on the other side of the light source unit (3), and the distance between the second gear (234) and the fourth gear (236) is equal to the first rack (231) and the The distance between the second rack (232), the fourth motor (237) and the first tooth The wheels (233) are connected, and the fifth motor (238) is connected to the second gear (234).
The shading mechanism of the test light box according to claim 2-4, characterized in that: a plurality of sets of lifting units (4) are provided on the outside of the light source unit (3), and the lifting unit (4) includes a lifting element (41) A lifting rod (42) and a guide rail (43), the lifting element (41) is provided along an outer periphery of the light source unit (3), and the lifting rod (42) is provided on the lifting element (41) Above), the guide rail (43) is connected to the lifting rod (42), and the lifting rod (42) can move in a vertical direction along the guide rail (43).
The shading mechanism of the test light box according to claim 5, wherein the jacking element (41) is an air cylinder.
The light-shielding mechanism of the test light box according to claim 1, characterized in that the light-shielding cloth (1) is an optical composite film, and the light-shielding area (11) is spray-painted with a light-opaque material.