TWM518337U - Backlight module automatic adhering device with built-in direct alignment device capable of auto focus and contrast enhancement - Google Patents

Description

Direct alignment device with built-in autofocus and enhanced contrast for backlight module automatic laminating machine

The present invention relates to an optical inspection device for a backlight module automatic laminating machine, in particular to a direct alignment device for a built-in autofocus and enhanced contrast of a backlight module automatic laminating machine.

The conventional liquid crystal display panel is composed of TFT (thin film transistor), but it does not emit light by itself. The light intensity of the backlight module is required to illuminate the entire display screen, so in mobile phones, tablet computers, notebooks, digital devices. Cameras, LCD TVs, car screens, video games, business machines, or small appliances. Wherever there is a liquid crystal display screen, there is a need for a backlight module. At present, the largest amount of the smart phone is of course the largest; the backlight module The structure is divided into two parts by the assembly process: the pre-process is to cover the frame 60 and the back cover 80, the reflection sheet 70, the light guide plate 50, the light-emitting diode (LED) 90, and the flexible printed circuit board ( FPC) 1 combination, and then the post-process assembly of three optical films (lower diffusion film 40, lower brightness enhancement film 30 and upper brightness enhancement film 20), and finally a piece of light shielding film 10 to complete the entire assembly of the backlight module Work (as shown in the first figure). In the past, the backlight modules were assembled manually. In the clean room, the operator wiped the optical film one by one from the protective film with a pair of gloves and gloves, and then placed them in the plastic frame. Thus, it takes about 45 seconds to 1 minute to assemble four membranes manually. Later, the demand for mobile phones exploded, so that the automatic laminating machine has been developed to automatically operate the program. The machine can replace the manual automatic feeding, automatic positioning, and automatic take-up to complete the assembly and bonding machine. Shorten the group to 5 seconds (as shown in the second figure, the automatic laminating machine is a multi-station type, which is the feeding station of the plastic frame, the cleaning station for eliminating static electricity and removing debris, and the lower diffusion sheet. Station 4, lower glossing bonding station 3, upper brightnessing bonding station 2, preparatory station 5, visor bonding station 1, tamping station compacting station 8, finished product discharge station 9), that is, four sheets The diaphragm is compacted and automatically discharged. Since the size of the mobile phone window has been increased from two or three inches to five or six inches, and the overall design thickness has become thinner and thinner, the frame has been made narrower and narrower in order to highlight the large picture; correspondingly, the backlight mode The group is also compressed to thin With the surrounding frame as small as 1mm or less, the positioning accuracy of the mechanism used in the automatic laminating machine has been insufficient. Therefore, the automatic image position is used instead, but the color contrast between the plastic frame and the die surface is too close. There is a problem with the identification; in addition, there is a considerable drop in the height of the diaphragm pick and place, and the magnification and depth of field are outside the working range of the visual alignment. In order to avoid this problem, the commercially available visual alignment automatic laminating machine adopts the indirect alignment method. The so-called indirect alignment is to use the diaphragm and the background in comparison with the plastic frame, and the diaphragm is fixed in the image capturing device. After the position is recognized, the positive position is turned, and then the diaphragm is sucked into the plastic frame. Although the image alignment is used, the positive alignment is not performed directly above the assembly of the plastic frame, and the trial and error method is biased, and then the command is corrected. Losing the meaning of true alignment, the technical bottleneck of the direct alignment is that the plastic frame is close to the color of the diaphragm, and the contrast of the image is too small to be accurately identified, so that the background contrast is strengthened and then identified. During the film transfer process, there is a height difference with the plastic frame, and the difference far exceeds the depth of field of the image capturing device, and the focus cannot be effectively focused, and the image magnification is also different to cause the visual alignment error. Although the organic type is directly aligned on the market, but the panoramic image is used, and the tens of millions of pixels of the image capturing component are installed, the entire size of the entire film is captured, but the average pixel per unit area is obtained because of the panoramic view. On the contrary, too little, so the resolution is not good, with a simple analogy, is to use the principle of telescope to take pictures, see the whole picture, but slightly the refinement of the alignment, of course, the accuracy is not high; in order to provide more For the actual demand items, the creator conducts research and development to solve the problems that are easy to produce in the conventional use.

The main purpose of this creation is to provide a direct alignment device for the built-in autofocus and contrast enhancement of the backlight module automatic laminating machine, which adopts a low pixel image capturing component, but is respectively disposed at the opposite ends of the diagonal line and the diagonal line. Image comparison, cost saving, and more accurate comparison, so that the two corners are correct, that is, the four sides are aligned, and the setting of the automatic lifting platform and the controllable movable background film is as follows. The way to improve the resolution.

In order to achieve the above purpose, the structure of the creation is: three diaphragm assemblys arranged in the backlight film group, which is a switching element having a background piece in the lower half of a stand, and a take-up on the upper half of the stand. An auto-lifting mechanism component of the component; wherein the image capturing component has at least two ends disposed at a line (an adjacent line or a diagonal line), and the image of the partially captured corner is sent to an image analyzing component for analysis Whether the positive plastic frame and the diaphragm are corrected to match the transfer mechanism component of the diaphragm; wherein the automatic lifting mechanism component of the image capturing component is also connected to the image analyzing component, first ingesting The object of the plastic frame is at a distance from the image, and then rises a short distance. After moving into the film, the image is re-imaged and then compared by the image analysis component. The switching element of the background film has a background film on a lateral translation mechanism component. The background piece is matched with the depth and reverse setting of the plastic frame. When the transfer mechanism component of the diaphragm moves over the plastic frame, the background piece is also transferred by the lateral translation mechanism element to the lower position of the plastic frame.

In order to enable your review committee to further understand the techniques, means and functions of this creation for the purpose of achieving the intended purpose, a better and feasible embodiment is presented, and the detailed description of the drawings is followed, and the purpose and characteristics of the creation are believed. And the advantages, when you can get a deep and specific understanding.

[study]

10‧‧ ‧ shading film

20‧‧‧Uplighting

30‧‧‧下增片

40‧‧‧Drops

50‧‧‧Light guide plate

60‧‧‧ plastic frame

70‧‧‧reflector

80‧‧‧Back cover

90‧‧‧Lighting diode (LED)

91‧‧‧Soft Printed Circuit Board (FPC)

6‧‧‧ Feeding station

7‧‧‧Clean station

4‧‧‧Drop film bonding station

3‧‧‧Glowing film bonding station

2‧‧‧Uplighting film bonding station

5‧‧‧Preparation station

1‧‧‧shading station

8‧‧ ‧ Shuttering station for shading

9‧‧‧ Finished product discharge station

[this creation]

11‧‧‧Background film

12‧‧‧Switching components

13‧‧‧Image taking components

14‧‧‧ Lifting mechanism components

16‧‧‧ stand

The first figure is a planar side exploded view of a conventional component.

The second picture is a perspective view of a conventional machine.

The third picture is a perspective view of the background piece of the creation.

The fourth figure is a perspective view of the image capturing component of the creation.

The fifth picture is the top view of the set background and imaging components of the creation.

The sixth picture is a three-dimensional diagram of the creation on the machine.

As shown in the third to sixth figures, the direct alignment device for the built-in autofocus and contrast enhancement of the backlight module automatic laminating machine is provided in the assembly of the three diaphragms of the backlight film group. A switching element 12 having a background piece 11 in the lower half of a stand 16 (fifth, sixth figure), and an automatic lifting mechanism element 14 having an image taking element 13 in the upper half of the stand 16; the image taking element 13 (Lens) having at least two ends disposed at one line (the adjacent line or the diagonal line) (three shown in the fourth figure, and the image at the partial capture corner is sent to an image analysis element (Fig. In the case where it is not shown, it is analyzed whether the positive plastic frame and the diaphragm are corrected to match the transfer mechanism component of the diaphragm; wherein the automatic lifting mechanism component of the image capturing component is also connected with the image analyzing component, and the plastic frame is first taken. The object distance image is then increased by a small distance, and after being moved into the film, the image is re-imaged and then image-aligned by the image analysis component; wherein the switching element 12 of the background film 11 has a background film on a lateral translation mechanism component. 11, the background piece 11 is matched with the depth of the plastic frame, Membrane transfer mechanism While the component is moved over the frame, the background piece is also transferred by the lateral translation mechanism element below the same position of the frame.

The switching element of the controllable movable background piece, when the film is sent directly to the plastic frame, a background piece is cut between the gap between the plastic frame and the film, and three optical films are assembled in the white light color plastic frame. Use a dark background film; use a light background piece when assembling three optical films in a black and dark plastic frame; thus, the contrast enhancement can naturally be accurately identified (as shown in the third figure).

The automatic lifting mechanism component of the image capturing component is used to fix the image capturing object distance, and the image capturing component is fixed directly above the assembled plastic frame. When each station is in the assembly position, the rubber frame is first imaged, and the coordinate position is calculated, and then When the diaphragm is sent to the position directly above the assembly, except for the cutting of the background piece, the entire image capturing device is stably raised upward by a small distance on a power sliding table, and the object distance between the lens and the previous lens to the plastic frame is raised. The object distance is the same, thus eliminating the imaging error, and calculating the gap between the diaphragm coordinates and the frame assembly, and using the X, Y, and θ axes on the diaphragm transfer mechanism to align the alignment (as shown in the fourth figure).

The image taking component captures the image of the diagonal line and the diagonal line to increase the resolution by microscopic enlargement. In the position of the adjacent or diagonal corner of the plastic frame, two groups to three groups of images are installed according to the precision requirement. The component can be calculated by taking a small field of view magnified image of the adjacent pair of feet to calculate the coordinate position of the entire film. The cost of the image capturing component used is not too expensive, and the resolution of the unit area is several times that of tens of millions. An expensive camera with pixels can easily achieve resolutions of less than 6 micron (0.006mm) with a 5 megapixel camera (as shown in Figure 5).

In summary, the design uses a specially designed low-pixel two or more imaging components to improve the accuracy of alignment, which is completely different from other commercially available machines using panoramic or indirect alignment. The accuracy of the image is only 0.05mm. The 5 megapixel camera can achieve a resolution of less than 6 micron (0.006mm), which is much higher than the precision requirement of the backlight module. It is ten times more precise than the conventional one. It can greatly reduce the manufacturing cost of the machine. Because it is combined with the local image micro-amplification, it can easily meet the demand of the matching table with the automatic lifting platform and the controllable movable background film, so that the machine is good. The rate is greatly improved, and the cost can be greatly reduced under the control. Therefore, the overall structure is the easiest to understand and implement, so it can provide good usability and cost convenience, and is a completely different institution.

The above is a detailed description and drawing of the preferred embodiment of the present invention, and is not used To limit the creation of this work, all scope of the creations shall be subject to the following patent scope, and the spirit of the patent scope and its similarly modified embodiments and approximate structures shall be included in this creation.

11‧‧‧Background film

12‧‧‧Switching components

13‧‧‧Image taking components

14‧‧‧ Lifting mechanism components

16‧‧‧ stand

Claims (1)

The backlight module automatic laminating machine has built-in auto-focusing and contrast-enhancing direct aligning device, which is arranged in the assembly of three diaphragms of the backlight film group, and is a switching element with a background piece in the lower half of a stand. The upper lifting half of the vertical frame has an automatic lifting mechanism component of the image taking component; wherein the image capturing component has at least two images disposed at two ends of the line (the adjacent line or the diagonal line) and partially capturing the corner Sending to an image analysis component for analysis whether the positive plastic frame and the diaphragm are corrected to match the transfer mechanism component of the diaphragm; wherein the automatic lifting mechanism component of the image capturing component is also connected with the image analyzing component, and the glue is first taken. The object of the frame is spaced from the image, and then rises a short distance. After moving into the diaphragm, the image is re-imaged and then image-aligned by the image analysis component; wherein the switching element of the background film has a background film on a lateral translation mechanism component. The background piece is matched with the depth and back of the frame, and when the film transfer mechanism element is moved over the frame, the background piece is also transferred by the lateral translation mechanism element to the lower position of the frame.