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

Backlight module automatic adhering device with built-in direct alignment device capable of auto focus and contrast enhancement Download PDF

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Publication number
TWM518337U
TWM518337U TW104210148U TW104210148U TWM518337U TW M518337 U TWM518337 U TW M518337U TW 104210148 U TW104210148 U TW 104210148U TW 104210148 U TW104210148 U TW 104210148U TW M518337 U TWM518337 U TW M518337U
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Taiwan
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image
component
frame
film
diaphragm
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TW104210148U
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Chinese (zh)
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Wen-Shan Dong
Jue-Ren Zhang
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Jan Tech Automation Co Ltd
Jue-Ren Zhang
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Priority to TW104210148U priority Critical patent/TWM518337U/en
Publication of TWM518337U publication Critical patent/TWM518337U/en

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背光模組自動貼合機內建自動對焦及增強對比之直接對位裝置 Direct alignment device with built-in autofocus and enhanced contrast for backlight module automatic laminating machine

本創作係關於一種背光模組自動貼合機光學檢查裝置,特別是指一種背光模組自動貼合機內建自動對焦及增強對比之直接對位裝置。 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.

習知之液晶顯示面板是由TFT(薄膜電晶體)所組成,但其本身不會自主發光,需經由背光模組的光強度才能照亮整個顯示幕,所以在手機、平板電腦、筆電、數位相機、液晶電視、車載銀幕、電玩機、事務機器或是小家電,凡是有液晶顯示幕的地方都需要有背光模組的存在,目前用量最大的當然還是智慧型手機為最大宗;背光模組的結構由組裝的前、後工序分為二大部份:前工序是將膠框60與背蓋80、反射片70、導光板50、發光二極體(LED)90、軟式印刷電路板(FPC)1等組合,接著交由後工序組裝三張光學膜片(下擴散片40、下增光片30及上增光片20),最後再貼上一片之遮光片10完成背光模組的整個組裝工作(如第一圖所示)。以往背光模組都採用人工進行組裝,在無塵室中由操作人員著無塵服帶著手套用鑷子小心將光學膜片一一從保護膜中夾取出,然後對準放入膠框中,如此,使用人工手工進行組裝四張膜片約需45秒至1分鐘。後來手機的需求量爆增,於是至目前已發展出自動貼合機進行自動作的操作程序,以機械取代人工能自動供料、自動整位、自動取片完成組裝貼合之機台,可以縮短至5秒內完成一組(如第二圖,自動貼合機是多站式,分別是放入膠框之入料站4、消除靜電與去除雜物之清潔站7、下擴散片貼合站4、下增光片貼合站3、上增光片貼合站2、預備站5、遮光片貼合站1、遮光片之壓實站8、成品排出站9),即能將四張膜片裝妥壓實並自動排出。由於手機視窗尺寸由二、三寸一直加大到五、六寸,而且整體設計厚度變得愈來愈薄,又為了突顯大畫面又將邊框做的愈來愈窄;相對應地,背光模組也跟著被壓縮到變薄 與四周邊框小到1mm以下,以往自動貼合機上使用機構之定位精度已不敷使用,因此改用影像自動位,可是受限於膠框與模面二者間顏色對比太接近,取像辨識出現問題;另外,膜片取放的高度有相當大的落差,倍率及景深都在視覺對位的工作範圍之外。一般市售視覺對位的自動貼合機為了迴避此問題,於是採用間接對位方式;所謂間接對位是在膠框旁利用膜片與背景的對比,將膜片以固定的取像裝置作位置辨識後轉正對位,接著才將膜片吸放到膠框內,雖然是使用影像對位,可是不在膠框組裝的正上方轉正對位,採用試誤法有偏差,再下指令修正而失去了真正對位的意義,為什麼不直接對位的技術瓶頸就在於:膠框與膜片顏色接近,影像對比太小無法作精確辨識,乃至於在旁便加強背景對比後再作辨識。膜片移載過程中與膠框有一高度差,而此差距遠超過取像裝置的景深範圍而無法有效對焦,同時取像倍率也因此不同造成視覺對位的誤差。市面上雖有機型採用直接對位,但使用全景取像,動擇裝設數千萬像素的取像元件,整個膜片全尺寸雖被擷取到,可是因為全景而使單位面積平均的像素反而太少,以致解析度不佳,用一淺顯的比喻,是用望遠鏡的原理取像,看到了全貌,卻乎略了對位的精緻化,當然準確度就不高了;為了提供更符合實際需求之物品,創作人乃進行研發,以解決習知使用上易產生之問題。 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.

本創作之主要目的在於提供一種背光模組自動貼合機內建自動對焦及增強對比之直接對位裝置,採用低像素之取像元件,但分別於鄰角線、對角線的兩端設置取像比對,節省成本,且對比更精準確實,使二角正確即四邊都已對正,配合設有自動昇降的載台與可控式活動背景片的切換設置,有如以顯微放大之方式提高了解析度。 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.

為達成上述之目的,本創作之結構為:設於背光膜組之三片膜片組裝處,是於一立架之下半具有一背景片的切換元件、於立架之上半具有一取像元件之自動昇降機構元件;其中取像元件具有至少二個設於一線(鄰角線或對角線)之兩端處,且局部擷取角落處之影像送至一影像解析元件處進行分析是否對正膠框與膜片,以配合膜片之移載機構元件進行修正;其中取像元件之自動昇降機構元件也與影像解析元件相連接,先攝取 膠框之物距像,之後再上昇一小段距離,移入膜片後,再度取像後由影像解析元件處進行對焦比對;其中背景片的切換元件具有一橫向平移機構元件上之一背景片,背景片配合膠框之深淺反向設定,當膜片之移載機構元件移至膠框上方之同時,背景片也由橫向平移機構元件移載至膠框之相同位置下方處。 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.

為使 貴審查委員能更進一步瞭解本創作為達成預定目的所採取之技術、手段及功效,茲舉一較佳可行之實施例,並配合圖式詳細說明如後,相信本創作之目的、特徵與優點,當可由此得一深入且具體之瞭解。 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.

〔習知〕 [study]

10‧‧‧遮光片 10‧‧ ‧ shading film

20‧‧‧上增光片 20‧‧‧Uplighting

30‧‧‧下增光片 30‧‧‧下增片

40‧‧‧下擴散片 40‧‧‧Drops

50‧‧‧導光板 50‧‧‧Light guide plate

60‧‧‧膠框 60‧‧‧ plastic frame

70‧‧‧反射片 70‧‧‧reflector

80‧‧‧背蓋 80‧‧‧Back cover

90‧‧‧發光二極體(LED) 90‧‧‧Lighting diode (LED)

91‧‧‧軟式印刷電路板(FPC) 91‧‧‧Soft Printed Circuit Board (FPC)

6‧‧‧入料站 6‧‧‧ Feeding station

7‧‧‧清潔站 7‧‧‧Clean station

4‧‧‧下擴散片貼合站 4‧‧‧Drop film bonding station

3‧‧‧下增光片貼合站 3‧‧‧Glowing film bonding station

2‧‧‧上增光片貼合站 2‧‧‧Uplighting film bonding station

5‧‧‧預備站 5‧‧‧Preparation station

1‧‧‧遮光片貼合站 1‧‧‧shading station

8‧‧‧遮光片之壓實站 8‧‧ ‧ Shuttering station for shading

9‧‧‧成品排出站 9‧‧‧ Finished product discharge station

〔本創作〕 [this creation]

11‧‧‧背景片 11‧‧‧Background film

12‧‧‧切換元件 12‧‧‧Switching components

13‧‧‧取像元件 13‧‧‧Image taking components

14‧‧‧昇降機構元件 14‧‧‧ Lifting mechanism components

16‧‧‧立架 16‧‧‧ stand

第一圖為習知元件之平面側視分解圖。 The first figure is a planar side exploded view of a conventional component.

第二圖為習知之機台立體圖。 The second picture is a perspective view of a conventional machine.

第三圖為本創作之設置背景片之立體圖。 The third picture is a perspective view of the background piece of the creation.

第四圖為本創作之設置取像元件之立體圖。 The fourth figure is a perspective view of the image capturing component of the creation.

第五圖為本創作之設置背景片與取像元件之頂視圖。 The fifth picture is the top view of the set background and imaging components of the creation.

第六圖為本創作之設於機台之立體圖。 The sixth picture is a three-dimensional diagram of the creation on the machine.

如第三圖至第六圖所示,為本創作一種背光模組自動貼合機內建自動對焦及增強對比之直接對位裝置,設於背光膜組之三片膜片組裝處,是於一立架16(第五、六圖)之下半具有一背景片11的切換元件12、於立架16之上半具有一取像元件13之自動昇降機構元件14;其中之取像元件13(鏡頭)具有至少二個設於一線(鄰角線或對角線)之兩端處(第四圖中所示為三個,且局部擷取角落處之影像送至一影像解析元件(圖中未表示)處進行分析是否對正膠框與膜片,以配合膜片之移載機構元件進行修正;其中取像元件之自動昇降機構元件也與影像解析元件相連接,先攝取膠框之物距像,之後再上昇一小段距離,移入膜片後,再度取像後由影像解析元件處進行對焦比對;其中之背景片11的切換元件12具有一橫向平移機構元件上之一背景片11,背景片11配合膠框之深淺反向設定,當膜片之移載機構 元件移至膠框上方之同時,背景片也由橫向平移機構元件移載至膠框之相同位置下方處。 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.

可控式活動之背景片的切換元件,膜片送到膠框正上方時,在膠框與膜片的空隙間切入一背景片,於白淺色之膠框所組裝三張光學膜片時用暗色背景片;於黑深色之膠框所組裝三張光學膜片時用淺色背景片;如此產生對比度之強化,自然能作精確的辨識(如第三圖)。 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).

取像元件之自動昇降機構元件,以固定取像物距,取像元件固定在組裝之膠框之正上方處,各站在組裝位置時,先對膠框取像,並計算座標位置,之後膜片再送到組裝正上方位置時,除了背景片之切入外,整個取像裝置在一動力滑台上被向上穩定的昇高一小段距離,上昇後鏡頭之物距與之前鏡頭到膠框的物距相同,因此消除了成像的誤差,同時計算膜片座標與膠框組裝間的差距,用膜片移載機構元件上的X、Y、θ軸轉位對正(如第四圖)。 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).

取像元件擷取鄰角線、對角線小範圍的影像以顯微放大方式提高解析度,在膠框鄰角或對角線的位置,依精度需求裝設二組到三組之取像元件,擷取鄰對腳小視野放大影像即可計算出整張膜片座標位置,使用的取像元件造價不需太貴,因局部取像放大反而單位面積的解析度數倍於數千萬像素的昂貴相機,以500萬像素的相機就可輕易達到小於6micron(0.006mm)的解析度(如第五圖)。 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).

綜上所述之結構,本創作運用特殊設計之低像素的二組以上之取像元件,便能提高對位之精度,完全不同於其它市售之機台採用全景取像或間接對位取像的精度僅有0.05mm,本創作以500萬像素的相機可做到小於6micron(0.006mm)的解析度,遠高於背光模組貼合的精度需求,是習知之十倍精確,如此便能大幅降低機台的製作成本,因配合採用局部取像顯微放大後,配合自動昇降的載台與可控式活動背景片的切換設置,更容易達到對位之需求,讓機台之良率大幅提高,成本便能於管控下大幅降低,所以,整體結構讓人最容易了解與實施,所以能提供很好之使用性與成本便利性,為一完全與習知不同之機構。 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.

以上所述為本創作之較佳實施例之詳細說明與圖式,並非用 來限制本創作,本創作之所有範圍應以下述之專利範圍為準,凡專利範圍之精神與其類似變化之實施例與近似結構,皆應包含於本創作之中。 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‧‧‧背景片 11‧‧‧Background film

12‧‧‧切換元件 12‧‧‧Switching components

13‧‧‧取像元件 13‧‧‧Image taking components

14‧‧‧昇降機構元件 14‧‧‧ Lifting mechanism components

16‧‧‧立架 16‧‧‧ stand

Claims (1)

一種背光模組自動貼合機內建自動對焦及增強對比之直接對位裝置,設於背光膜組之三片膜片組裝處,是於一立架之下半具有一背景片的切換元件、於立架之上半具有一取像元件之自動昇降機構元件;其中取像元件具有至少二個設於一線(鄰角線或對角線)之兩端處,且局部擷取角落處之影像送至一影像解析元件處進行分析是否對正膠框與膜片,以配合膜片之移載機構元件進行修正;其中取像元件之自動昇降機構元件也與影像解析元件相連接,先攝取膠框之物距像,之後再上昇一小段距離,移入膜片後,再度取像後由影像解析元件處進行對焦比對;其中背景片的切換元件具有一橫向平移機構元件上之一背景片,背景片配合膠框之深淺反向設定,當膜片之移載機構元件移至膠框上方之同時,背景片也由橫向平移機構元件移載至膠框之相同位置下方處。 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.
TW104210148U 2015-06-24 2015-06-24 Backlight module automatic adhering device with built-in direct alignment device capable of auto focus and contrast enhancement TWM518337U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI593968B (en) * 2016-08-08 2017-08-01 由田新技股份有限公司 A transfering apparatus for inspecting plurality of panel simultanneously, and one-side/both side inspecting system comprising thereof
CN107806462A (en) * 2017-11-23 2018-03-16 广东弘景光电科技股份有限公司 Camera module automatic focusing assembly equipment
CN107830032A (en) * 2017-11-23 2018-03-23 广东弘景光电科技股份有限公司 Camera module automatic focusing assembly method
TWI719852B (en) * 2020-03-05 2021-02-21 瑞軒科技股份有限公司 Processing system and processing method of direct type backlight device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI593968B (en) * 2016-08-08 2017-08-01 由田新技股份有限公司 A transfering apparatus for inspecting plurality of panel simultanneously, and one-side/both side inspecting system comprising thereof
CN107703649A (en) * 2016-08-08 2018-02-16 由田新技股份有限公司 Transfer equipment for simultaneously detecting multiple material sheets to be detected and detection system thereof
CN107703649B (en) * 2016-08-08 2020-08-04 由田新技股份有限公司 Transfer equipment for simultaneously detecting multiple material sheets to be detected and detection system thereof
CN107806462A (en) * 2017-11-23 2018-03-16 广东弘景光电科技股份有限公司 Camera module automatic focusing assembly equipment
CN107830032A (en) * 2017-11-23 2018-03-23 广东弘景光电科技股份有限公司 Camera module automatic focusing assembly method
TWI719852B (en) * 2020-03-05 2021-02-21 瑞軒科技股份有限公司 Processing system and processing method of direct type backlight device

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