1247093 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種檢測液晶面板是否具有均勻間距 (Cell Gap)之檢測機台及檢測方法，且特另^是有關於一種可迅速 的以人工或自動方式檢測液晶面板是否具有均勻間距之檢測機 台及檢測方法。 【先前技術】 薄膜電晶體平面顯示螢幕，特別是薄膜電晶體液晶顯示螢幕 (以下簡稱TFT-LCD)，主要是利用成矩陣狀排列的薄膜電晶體，配 合適當的電容、轉接墊等電子元件來驅動液晶像素，以產生豐富亮 麗的圖形。由於TFT-LCD具有外型輕薄、耗電量少以及無輻射污 染等特性，因此被廣泛地應用在筆記型電腦（Notebook)、個人數位 助理（PDA)等攜帶式資訊產品上，甚至已有逐漸取代傳統桌上型電 腦之CRT監視器的趨勢。 傳統的TFT-LCD主要具有一下基板，其上有許多以陣列方式 排列的薄膜電晶體、像素電極、互相垂直交錯的掃瞄線（Scan or Gate Line)以及訊號線（Data or Signal Line)，一具有彩色濾光鏡 (Color Filter，CF)的上基板，以及填充於下基板與上基板之間的 液晶分子。其中上基板與下基板可為透明的玻璃基板。使用 TFT-LCD時，係以垂直於水平面或與水平面略成一傾斜角立於一 平台。一般會在具有彩色濾光鏡的上基板處形成多個感光型間隔物 (Photo Spacer)，若是感光型間隔物本身高度不足、液晶分子的填 充量過多、加壓封口製程沒有將多餘的液晶分子擠出等等因素，造 成上下基板間的間距不一，則會產生許多問題。其中最常見的就是 液晶顯示螢幕在直立狀態長時間使用後（如TFT—LCd在出廠前進 1247093 行加溫信賴度測試，或是出廠後在使用者長時間點亮使用），上方 的液晶分子會因為重力而向下方流動，因而造成間距（Ce丨丨Gap) 不均一，以致產生重力色不均（Gravjty Mura)的問題。 睛參照第1圖，其繪示液晶顯示螢幕内液晶分子產生重力色 不均之示意圖。第1圖中，筆記型電腦100由操作平台1〇2與液 晶顯示螢幕所組成，液晶顯示螢幕則由框架（未顯示）固定住顯示面 板104。顯示面板104包括一具有彩色濾光鏡(CF)的上基板1〇6 和一具有薄膜電晶體(TFT)的下基板108。上基板1〇6和下基板1〇8 中間所填充的液晶分子若過量則長時間使用後會由於重力的影響 而向下流動，累積於液晶顯示螢幕104的下方靠近操作平台1〇2 處，使液晶顯示螢幕104下方的間距（Ce|| Gap)變大。由於液晶對 光的延遲量（retardation)是靠間距來控制，因此當下方的間距改變 了，此處的液晶分子旋光性也會不同。假設施以一電壓於液晶顯示 螢幕104，欲使液晶分子呈現關閉狀態，但螢幕1〇4下方可能會 因間距改變造成漏光的情形，此種現象即為重力色不均（Gravjty Mura)。 因此，顯示面板的間隙不均所產生的問題（例如重力色不均的 現象）不但影響了螢幕的顯像品質，也縮短了產品的使用壽命。一 般在產品製程時，即需要檢查顯示面板的間距是否均勻，是否有 重力色不均的現象產生。請參照第2圖，其繪示一種傳統檢查顯 示面板之方法示意圖。首先，將對組完成的面板22 一片片平放於 加熱裝置（如烤爐）24中，再以垂立方式對面板22進行加熱。加熱 是為了使液晶分子的黏度降低，加速填充過多的液晶分子可因重力 而向下流動。檢驗時，將加熱後的面板22置放於一具有背光源 (Backlight)的架台26上，架台26上並貼附第一偏光板 (Polarizer)27，面板22則放置於第一偏光板27上，檢驗人員則 1247093 取第二偏光板28以旋轉的方式對面板22進行檢驗。若面板22有 間距不均的狀況產生例如重力色不均的問題，檢驗人員可透過 第二偏光板28觀察到面板22有色澤濃淡不均的現象，特別是 在面板22下方容易產生重力色不均的位置。然而，此種傳統的 檢查方法需要依靠人工作業，一片一片的將面板22放置在架台 26上’再慢慢旋轉第二偏光板28以做檢驗。因此，除了面板22 的加熱時間外，還有面板22挪動、置放及檢驗的冗長作業時 間，費力費時，極不具經濟效益。 【發明内容】 有鑑於此，本發明的目的就是在提供一種檢測機台及檢測 方法，以迅速檢測出液晶面板是否具有均勻間距（Ceil Gap)。 根據本發明的目的，係提出一種檢測機台，至少包括一平 台（Stage)、一光源（Light Source)、一影像擷取裝置、一第一 偏光板（First Pol arize r)和一第二偏光板（Second Polarizer)。平 台係用以承載一待檢測之液晶面板。光源係設置於平台下方， 以自待檢測之液晶面板之背後向前照射。第一偏光板則設置於 光源與液晶面板之間，用以轉換光源的光線極性。影像擷取裝 置係設置於平台上方，用以擷取待檢測之液晶面板之影像。第 二偏光板則設置於影像擷取裝置與液晶面板之間。 根據本發明的目的，係提出一種檢測方法，用以檢測一液 晶面板是否具有均勻之一間距。檢測方法包括步驟：提供一平 台用以承載液晶面板，自平台下方以一光源對液晶面板照光， 使光線自液晶面板之背後向前照射；以一影像擷取裝置擷取待 檢測之液晶面板之影像；及以一處理單元紀錄並儲存所擷取之 影像。其中，在光源與液晶面板之間設置一第一偏光板，在影 1247093 - 像擷取裝置與液晶面板之間設置一第二偏光板，以轉換該光源 的光線極性。 【實施方式】 本發明在檢驗液晶顯示面板時，係應用數位巨觀（Digital Macro) 影像處理的方式，以迅速地檢驗出顯示面板是否具有均勻的間距。 以下係以一實施例做本發明之檢測機台與檢測方法的詳細說明，然 而，該實施例並不會限縮本發明欲保護之範圍。本發明之技術並不1247093 IX. Description of the Invention: [Technical Field] The present invention relates to a detection machine and a detection method for detecting whether a liquid crystal panel has a uniform pitch (Cell Gap), and particularly relates to a rapid A detection machine and a detection method for detecting whether the liquid crystal panel has a uniform pitch manually or automatically. [Prior Art] Thin film transistor flat display screen, especially thin film transistor liquid crystal display screen (hereinafter referred to as TFT-LCD), mainly using thin film transistors arranged in a matrix, with appropriate capacitors, transfer pads and other electronic components To drive the LCD pixels to produce rich and beautiful graphics. TFT-LCD is widely used in portable information products such as notebooks and personal digital assistants (PDAs) because of its thin appearance, low power consumption and no radiation pollution. A trend to replace the CRT monitors of traditional desktop computers. A conventional TFT-LCD mainly has a lower substrate having a plurality of thin film transistors arranged in an array, pixel electrodes, Scan or Gate Lines and a Data or Signal Line. An upper substrate having a color filter (CF), and liquid crystal molecules filled between the lower substrate and the upper substrate. The upper substrate and the lower substrate may be transparent glass substrates. When a TFT-LCD is used, it stands on a platform perpendicular to the horizontal plane or at an oblique angle to the horizontal plane. Generally, a plurality of photosensitive spacers (Photo Spacer) are formed on the upper substrate having a color filter. If the photosensitive spacer itself is insufficient in height, the filling amount of liquid crystal molecules is excessive, and the pressurized sealing process does not have excess liquid crystal molecules. Factors such as extrusion and the like, resulting in different spacing between the upper and lower substrates, create many problems. The most common one is that after the liquid crystal display screen is used for a long time in an upright state (such as TFT-LCd in the factory advancement 12407093 line heating reliability test, or after the factory is used for a long time, the liquid crystal molecules will be used) The flow downwards due to gravity, resulting in a non-uniform spacing (Ce丨丨Gap), resulting in a problem of Gravjty Mura. Referring to Fig. 1, there is shown a schematic diagram showing the occurrence of gravity color unevenness of liquid crystal molecules in a liquid crystal display screen. In Fig. 1, the notebook computer 100 is composed of an operating platform 1〇2 and a liquid crystal display screen, and the liquid crystal display screen is fixed to the display panel 104 by a frame (not shown). The display panel 104 includes an upper substrate 1〇6 having a color filter (CF) and a lower substrate 108 having a thin film transistor (TFT). If the liquid crystal molecules filled in between the upper substrate 1〇6 and the lower substrate 1〇8 are excessive, the liquid crystal molecules flow downward due to the influence of gravity after a long time of use, and accumulate below the liquid crystal display screen 104 near the operation platform 1〇2. The pitch (Ce|| Gap) below the liquid crystal display screen 104 is made larger. Since the retardation of the liquid crystal to light is controlled by the pitch, when the pitch of the lower side is changed, the optical rotation of the liquid crystal molecules here is also different. The fake device has a voltage on the liquid crystal display screen 104, so that the liquid crystal molecules are turned off, but the light may be caused by the change of the pitch under the screen 1〇4, which is the gravity unevenness (Gravjty Mura). Therefore, the problem caused by the unevenness of the gap of the display panel (for example, the phenomenon of uneven color gravity) not only affects the development quality of the screen but also shortens the service life of the product. Generally, during the product manufacturing process, it is necessary to check whether the spacing of the display panel is uniform and whether there is a phenomenon of uneven gravity. Please refer to FIG. 2, which illustrates a schematic diagram of a conventional inspection display panel. First, the panel 22 of the group is placed flat in a heating device (e.g., oven) 24, and the panel 22 is heated in a vertical manner. Heating is to reduce the viscosity of liquid crystal molecules, and accelerate the filling of excessive liquid crystal molecules to flow downward by gravity. During the inspection, the heated panel 22 is placed on a gantry 26 having a backlight. The gantry 26 is attached with a first polarizer 27, and the panel 22 is placed on the first polarizer 27. The inspector then 1247093 takes the second polarizing plate 28 to inspect the panel 22 in a rotating manner. If the panel 22 has uneven spacing, for example, the problem of uneven gravity color, the inspector can observe the unevenness of the color of the panel 22 through the second polarizing plate 28, especially the gravity color is not generated under the panel 22. The location of the place. However, such a conventional inspection method requires manual work, placing the panel 22 on the gantry 26 one by one, and then slowly rotating the second polarizing plate 28 for inspection. Therefore, in addition to the heating time of the panel 22, there is also a lengthy working time for the panel 22 to be moved, placed, and inspected, which is laborious and time consuming, and extremely economical. SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a detecting machine and a detecting method for quickly detecting whether a liquid crystal panel has a uniform pitch (Ceil Gap). According to an object of the present invention, a detection machine is provided, comprising at least one stage, a light source, an image capturing device, a first polarizing plate and a second polarizing light. Plate (Second Polarizer). The platform is used to carry a liquid crystal panel to be inspected. The light source is disposed under the platform to illuminate the back of the liquid crystal panel to be detected. The first polarizing plate is disposed between the light source and the liquid crystal panel to convert the light polarity of the light source. The image capturing device is disposed above the platform for capturing an image of the liquid crystal panel to be detected. The second polarizing plate is disposed between the image capturing device and the liquid crystal panel. In accordance with the purpose of the present invention, a detection method is proposed for detecting whether a liquid crystal panel has a uniform pitch. The detecting method comprises the steps of: providing a platform for carrying the liquid crystal panel, and illuminating the liquid crystal panel with a light source from the bottom of the platform to illuminate the light from the back of the liquid crystal panel; and capturing the liquid crystal panel to be detected by an image capturing device Image; and record and store the captured image in a processing unit. Wherein, a first polarizing plate is disposed between the light source and the liquid crystal panel, and a second polarizing plate is disposed between the image 1247093-like capturing device and the liquid crystal panel to convert the light polarity of the light source. [Embodiment] In the inspection of the liquid crystal display panel, the present invention applies a digital macro image processing method to quickly check whether the display panel has a uniform pitch. The following is a detailed description of the detection machine and the detection method of the present invention by an embodiment. However, this embodiment does not limit the scope of the invention to be protected. The technology of the present invention is not
限於實施例中所敘述之模式。 請參照第3圖，其繪示依照本發明一較佳實施例之檢測機台 之簡單示意圖。檢測機台30至少包括一平台（stage)3i、一光源 (Light Source)33、一影像擷取裝置（lmage capture APparatus)35、一第一偏光板（First Polarizer)34 和一第二偏光 板（Second P〇lariZer)36。平台31是用來承載一待檢測之液晶 板32。平台31的設計可以是一般承載架台，或是具有傳輪機 傳輸帶和滚輪）的平台以連續式地傳送多塊對組完成之面板 一 33設置於平台31下方，以自待檢測之面板32背後向前照射& 在光源33與液晶面板32之間係設置第一偏光板34，It is limited to the mode described in the embodiment. Referring to Figure 3, a simplified schematic diagram of a testing machine in accordance with a preferred embodiment of the present invention is shown. The detecting machine 30 includes at least a stage 3i, a light source 33, an image capturing device (APage capture AP) 35, a first polarizing plate (First Polarizer) 34 and a second polarizing plate ( Second P〇lariZer) 36. The platform 31 is for carrying a liquid crystal panel 32 to be detected. The platform 31 can be designed as a general carrier platform or a platform with a transmission belt and a roller to continuously transport a plurality of pairs of panels. The panel 33 is disposed below the platform 31 to be behind the panel 32 to be inspected. Forward illumination & a first polarizing plate 34 is disposed between the light source 33 and the liquid crystal panel 32,
用以轉換 光源33發出的光線極性。而影像擷取裝置35，例如是電荷輕、 合元件（Charge Couple Device，CCD)，係設置於平台31上 方，用以擷取待檢測面板32之影像。並且在影像掏取梦置％ 與液晶面板32之間設置第二偏光板36，以轉換光線極性，使 面板間距不均的現象能清楚呈現。 另外’影像擷取裝置35更與一處理單元（未顯示）電性連 接。此處理單元可紀錄並儲存影像擷取裝置35所操取之影像 再利用人工或自動方式判斷所擷取的影像是否出現間距不均的 8 1247093 • / / / • 問題。 若以人工方式判斷，由於本發明是利用數位巨觀影像處理 方式，所擁取的影像係全面地呈現，並且將影像儲存在處理單 元，因此在判斷面板間距是否有問題時，操作人員直接從處理 早凡讀取已儲存之影像，不需等待機台負載/卸載以及影像操取 之時間，一個操作人員甚至可以同時檢查多條（例如4~5條）產 品線的產品，相較於傳統的檢查方法，具有省時省力的優點。 若影像操取當時操作人員因故無法立即檢驗面板狀況，則可利 用記錄之檔案查詢面板是否正常。另外，也可以自動方式判斷， 例如在處理單元中加入自動光學檢測系統，自動判斷是否有色 不均的異常產生，制用標示指令以標示出間距不均的面板， 或疋在處理單元中加入自動移除動作，將間距不均的面板自產 線上取下。本發明在此並不特別限制。 根據上述，本發明之檢測方法，用以檢測一液晶面板是否 具有均勻間距（Cell Gap)，係包括步驟如下。首先，提供一平台 (Stage)31用以承載一待檢測之液晶面板32。在置放面板％於 平口 31之鈾，亦需先加熱液晶面板32，加熱方式例如是垂直 加熱方式（如第2圖所示），以加速多餘的液晶分子向下流動。 接著’自平台31下方以一光源（Light s〇urce)33對液晶面板32 妝光’使光線透過第一偏光板34後自液晶面板32之背後向前 妝射。再以影像擷取裝置35透過第二偏光板36擷取待檢測液 晶面板32之影像。然後以一處理單元紀錄並儲存所擷取之影 像。最後以人工或自動方式判斷所呈現的影像是否有面板間距 不均的問題’例如面板下方是否出現重力色不均（Gravjty Mura) 的現象。 相車父於習知技術，本發明的檢測機台和檢測方法可迅速的 1247093 達到檢測面板間距是否均勻的目❸，具有省時省力，提高經濟 放1之乜點並且相較於習知技術必須在生產線外另設置檢測 機口曰本發明的檢測機台和檢測方法可以設置在基板對組且灌 夜曰曰後玻璃基板切割成小面板前的製程間，配合自動化整 口人整個生m中’如此可更有效率地從事檢測工作。 乡示上所述 :、、、毛明已以較佳實施例揭露如上，然其並非用 以限定本發明，任何熟習此技藝者，在不脫離本發明之精神和範圍 :可作各種之更動與潤飾，因此本發明之保護範 申請專利範圍所界定者為準。 彳交町& 【圖式簡單說明】 春第1圖繪示液晶顯示螢幕内液晶分子產生重力色不均之八名 第2圖繪示一種傳統檢查顯示面板之方法示意圖。 第3圖繪示依照本發明一較佳實施例之檢測 一 g。 口心間早示意 【主要元件符號說明】 1〇〇 :筆記型電腦 102 :操作平台 104、22、32 ··顯示面板 1 :具有彩色滤光鏡(CF)的上基板 1〇8 :具有薄膜電晶體(TFT)的下基板 24 :加熱裝置 26 ·β架台 27、34 ·•第一偏光板 1247093 28、36 :第二偏光板 30 :檢測機台 31 :平台（Stage) 33 :光源（Light Source) 35 :影像擷取裝置It is used to convert the polarity of the light emitted by the light source 33. The image capturing device 35 is, for example, a charge coupled device (CCD), which is disposed above the platform 31 for capturing an image of the panel 32 to be detected. And a second polarizing plate 36 is disposed between the image capturing dream % and the liquid crystal panel 32 to convert the polarity of the light, so that the unevenness of the panel spacing can be clearly presented. Further, the image capturing device 35 is further electrically connected to a processing unit (not shown). The processing unit can record and store the image captured by the image capturing device 35. The manual or automatic method can be used to determine whether the captured image has uneven spacing. 8 1247093 • / / / • The problem. If it is judged manually, since the present invention utilizes the digital panoramic image processing method, the captured image is comprehensively presented, and the image is stored in the processing unit, so when judging whether there is a problem with the panel spacing, the operator directly Handling pre-existing read images without waiting for machine load/unload and image acquisition time, an operator can even check multiple (for example, 4~5) product lines at the same time, compared to traditional The inspection method has the advantage of saving time and effort. If the operator cannot immediately check the panel status for any reason, the recorded file can be used to check whether the panel is normal. In addition, it can also be determined automatically, for example, by adding an automatic optical detection system to the processing unit, automatically determining whether an abnormality of color unevenness is generated, using a marking instruction to mark a panel with uneven pitch, or adding an automatic to the processing unit. Remove the action and remove the unevenly spaced panels from the production line. The invention is not particularly limited herein. According to the above, the detecting method of the present invention for detecting whether a liquid crystal panel has a uniform pitch (Cell Gap) includes the following steps. First, a stage 31 is provided for carrying a liquid crystal panel 32 to be detected. In the uranium in which the panel is placed at the flat port 31, the liquid crystal panel 32 is also heated first, for example, by a vertical heating method (as shown in Fig. 2) to accelerate the downward flow of excess liquid crystal molecules. Then, light is applied to the liquid crystal panel 32 from a lower side of the stage 31 by a light source. The light is transmitted through the first polarizing plate 34 and then projected from the back of the liquid crystal panel 32. Then, the image capturing device 35 captures the image of the liquid crystal panel 32 to be detected through the second polarizing plate 36. The captured image is then recorded and stored in a processing unit. Finally, it is manually or automatically determined whether the image presented has a problem of uneven panel spacing, such as the presence of Gravjty Mura under the panel. According to the conventional technology, the detection machine and the detection method of the invention can quickly reach the goal of detecting whether the panel spacing is uniform, which is time-saving and labor-saving, and improves the economy and is compared with the prior art. The detection machine must be installed outside the production line. The detection machine and the detection method of the invention can be set in the process of the substrate pair group and the glass substrate is cut into a small panel after the night, and the whole person is fully equipped with m. In the 'so that it can be more efficient in testing. It is to be noted that the following description of the preferred embodiments of the present invention is not intended to limit the present invention, and that those skilled in the art can make various changes without departing from the spirit and scope of the present invention. And the retouching, and therefore the scope defined by the scope of the protection patent application of the present invention shall prevail.彳交町 & [Simple description of the picture] Figure 1 of the spring shows eight liquid crystal molecules in the liquid crystal display screen. The second figure shows a schematic diagram of a traditional method for inspecting the display panel. Figure 3 illustrates the detection of a g in accordance with a preferred embodiment of the present invention. Early indication between the mouths [Main component symbol description] 1〇〇: Notebook 102: Operating platform 104, 22, 32 · Display panel 1: Upper substrate with color filter (CF) 1〇8: With film Lower substrate 24 of a transistor (TFT): heating device 26 · β gantry 27, 34 · First polarizing plate 12407093 28, 36: Second polarizing plate 30: Detection machine 31: Stage 33: Light source (Light Source) 35 : Image capture device
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