201245501 六、發明說明： 【發明所屬之技術領域】 本發明乃是關於一種工件表面的光致變色方法，特別 是指以光線照射於工件的表面，利用光線破壞色層的分 子，而使工件的表面產生不同顏色的方法。 【先前技術】 現今攜帶式電子產品非常普及，例如手機、個人數位 助理、電腦等。消費者愈來愈注重其外觀，因此各種電子 產品的殼體通常具有光亮的表面，特別是金屬表面，通常 加以多種手續，使其具有吸引人的平滑表面及光澤。 為著在殼體的表面上色，目前已知的技術有利用陽極 處理在金屬表面形成氧化膜而產生顏色的方法。此種方式 僅限於單一顏色，不易產生漸層色或是多色的變化。經陽 極處理產生的氧化膜會因厚度不同而產生不同顏色，厚度 決定於電解液濃度、電壓及電流強度、及電解時間…等許 多因素，若要形成不同厚度的氧化膜或是改變染色方法於 同一殼體上以產生不同顏色，實際上非常困難。 目前為了在同一铭型工件加工成兩種顏色，在素材工 件利用貼膜式進行兩次喷漆的方法，在第一次喷漆並經固 化後，必須採用貼膜遮蓋一部分，喷塗另一部分，然後撕 膜，以便獲得兩種顏色。然而，上述過程繁瑣費時，貼膜 容易影響喷漆的品質，此外喷漆也會影響工件表面的金屬 質感。 因此如何在殼體的表面產生不同顏色或漸層色，並且 具有金屬光澤、及金屬觸感，是本發明想要解決的課題。 【發明内容】 3/16 201245501 本發明所要解決的技術問題，在於提供一種工件表面 的光致變色方法’在工件的表面產生不同顏色或漸層色， 並且具有金屬光澤、及金屬觸感。 為了解決上述技術問題，根據本發明之其中一種方 案，提供一種工件表面的光致變色方法，包括下列的步驟： (a) 提供一工件； ’ (b) 形成一色層於該工件的表面； (c) 置放具有該色層的該工件於一平台上； (d) 提供一光源’設於該工件的上方；及 ⑷由該光源提供光線，照射於該卫件的該表面達一預定白; 時間’使該色層產生顏色的變化。 =明至少具有以下有益效果，本發明以光線照㈣ 工件（叙體）的表面以產生不同顏色或漸層色，可以於 ^體維持其金屬光澤、及金屬觸感，不會破壞其表面# 【實施方式】 為了能更進-步瞭解本發明為達成狀目的 請參閱以下有關本發明之詳細說明、 圖式相k本發明之目的、特徵與特點，告叮山^ 、 入且具體之瞭解’然而所附圖式 “二::: 用，並_來對本發明加以_者。考與㈣ [第一實施方式] -實i方本發明之工件表面的光致變色方法的第 方法第!^的方t示f圖。本發明之工件表面的光致變色 =Γ 包括至少下列主要的步驟： 步驟⑷、提供一工件2〇 ; ^ 4/16 201245501 +、形成—色層於該碍_表面，該色層200可 疋早純一底色或包括至少一顏色； ς = 置放具有該色層的該工件加於—平台上，本 、也列為水平地置放該工件20 ; 提供—光源1G，設於該卫件2g的上方；該光源10 為1外線、雷射或紅外線； 二称(e)、提供至少-舰件’位於該域10與該工件20之 間，及201245501 VI. Description of the Invention: [Technical Field] The present invention relates to a photochromic method for a surface of a workpiece, in particular, a method of illuminating a surface of a workpiece with light, and destroying the molecules of the color layer by using light to make the workpiece The method of producing different colors on the surface. [Prior Art] Today's portable electronic products are very popular, such as mobile phones, personal digital assistants, computers, and the like. Consumers are increasingly focusing on their appearance, so the housing of various electronic products typically has a shiny surface, especially a metal surface, which is often subjected to a variety of procedures to provide an attractive smooth surface and gloss. In order to color the surface of the casing, a currently known technique has a method of forming an oxide film on a metal surface by anodizing to produce a color. This method is limited to a single color, and it is not easy to produce a gradient or a multi-color change. The oxide film produced by the anodizing process may have different colors depending on the thickness, and the thickness is determined by many factors such as electrolyte concentration, voltage and current intensity, and electrolysis time, etc., if an oxide film of different thickness is formed or the dyeing method is changed. It is actually very difficult to produce different colors on the same casing. At present, in order to process the same type of workpiece into two colors, the material workpiece is sprayed twice by the film method. After the first painting and curing, the film must be covered with a part of the film, another part is sprayed, and then the film is peeled off. In order to get two colors. However, the above process is cumbersome and time consuming, and the film is liable to affect the quality of the paint, and the paint also affects the metallic texture of the surface of the workpiece. Therefore, how to produce different colors or gradation colors on the surface of the casing, and to have a metallic luster and a metallic touch are the problems to be solved by the present invention. SUMMARY OF THE INVENTION 3/16 201245501 The technical problem to be solved by the present invention is to provide a photochromic method for the surface of a workpiece which produces different colors or gradation colors on the surface of the workpiece, and has metallic luster and metallic touch. In order to solve the above technical problems, according to one aspect of the present invention, a photochromic method for a surface of a workpiece is provided, comprising the steps of: (a) providing a workpiece; '(b) forming a color layer on the surface of the workpiece; c) placing the workpiece having the color layer on a platform; (d) providing a light source 'located above the workpiece; and (4) providing light from the light source to illuminate the surface of the guard to a predetermined white ; time ' causes the color layer to change color. The invention has at least the following beneficial effects. The present invention uses light to illuminate the surface of the workpiece (synthesis) to produce different colors or gradient colors, which can maintain its metallic luster and metallic touch without damaging its surface. [Embodiment] In order to further understand the present invention, the following is a detailed description of the present invention, and the purpose, features, and characteristics of the present invention are disclosed in the following description. 'However, the drawings "2::: use, and _ to the present invention." Test and (4) [First Embodiment] - The first method of the photochromic method of the surface of the workpiece of the present invention! The square of the workpiece shows the photochromism = Γ including at least the following main steps: Step (4), providing a workpiece 2 〇; ^ 4/16 201245501 +, forming a color layer in the obstacle _ a surface, the color layer 200 may be as early as a base color or include at least one color; ς = placing the workpiece having the color layer on the platform, and placing the workpiece 20 horizontally; a light source 1G is disposed above the guard 2g; the light source 10 is 1 An outer line, a laser or an infrared ray; a second scale (e) providing at least a ship member between the field 10 and the workpiece 20, and
射於至少-遮蔽件3。 卿上述工件2〇可以為金屬材質，並可作為電子產品的殼 體。在提供I件的频⑻巾，可以進—步包括清洗該工件 ^的步驟，例如脫脂(degreasing)，亦即清除工件表面的油 脂，髒污；脫脂後，可進一步進行鹼洗(alkaHne etching)， 為著^除工件表面的天然氧化，並使工件露出純淨的金屬 基體’利於陽極膜的生成並獲得較高品質的膜層。後續還 可以化學抛光（chemical polishing)、化學姓刻或稱梨地 (chemical etching)、酸洗(surface adjuSt)。化學拋光是以化學 方式提高表面平整度，增加金屬基體表面光澤，可得較光 亮之表面；梨地是為著增加表面粗糙度以達到霧面或近似 於喷砂之效果；酸洗是為著去除前處理後工件表面所殘留 的石夕灰’並去除前製程殘留的化學劑，最主要可增加工件 表面的潔淨度以利陽極氧化製程。 在上述形成色層的步驟(b)中，以該工件20作為電子裝 置的殼體’並且殼體為鋁質為例說明，其表面的色層2〇〇 車父佳可以是陽極氧化染色技術，包括了（bl)陽極處理、（b2) 5/16 201245501 染色、以及(b3)封孔處理。 上述陽極處理，首先是將鋁質的該工件浸入電解液作 為陽極。前述電解液可以是酸系電解液。舉例而言，電解 液可以是硫酸毅。陽極處理後，於王件2()表面氧化而形 成陽極氧化膜，陽極氧化膜是由大量垂直於金屬表面的六 邊形晶胞組成，每個晶胞中心、有—個膜孔，並具有極強的 吸附力。陽極處理後’進行水洗以清紅件2Q的表面。 染色是將氧化過的鋁質的工件浸入染 分子通過舰仙私氧倾的觀卜㈣ = 成難以分離的共價鍵和離子鍵。 /、虱化膜形 封孔處理’例如蒸氣封孔、熱水封孔、中溫封孔，為 =染料較在難巾，同進增加氧化__、财磨等 扒丁姓主工 疋―少1从進行除灰(desmut)，以>· 留封孔液，以及去除表面雜質;吹風㈣ :夕餘水:认，料麵紐轉表面 (dry)’以使工件表面保持乾燥。 在步驟⑷巾，也可以視需要，提供m 20的側邊，以照射工件2〇的側邊。 、在"十 避蔽=)::該遮蔽件30可以是具有不同遮蔽程〇 遇敝處《而遮敝不同程度的光線 鬆的遮蔽處·或者較_舰處3()2 藉由形成不同疏密_^^者麵片。若於網版上月 膜，成不同疏密程度的遮蔽二== 6/16 201245501 可耐熱的材料製成，以承受步驟(f)所產生的熱。 -· 本發明藉由光線的照射，使工件20的色層200產生顏 化。其利㈣原理在於’當以制波長的光線透過 該遮蔽件3G照射於該工件2G的該表面達—預定的時間， 累積至-定的光能量，光線會破壞色層的分子，使顏 色變淡。光線可以是紫外線、紅外線或雷射光，例如近程 ’ 300〜_ nm) '中程㈣也’ 28〇〜315 或遠程 (far ’ 100〜280 nm)紫外線，其中紫外線波長愈短，能量強 度愈強，需要的時間就愈短。紫外線光源通常為燈管或發 光-極體(UV LED)，燈管適合於大面積照射用途，發光二 極體適合於小面積局部照射用途；雷射光源通常是昭 圍較小，適合局部照射用途。再藉由具有不同疏密的遮蔽 處的遮蔽件30，造成不同遮蔽的程度，因而可以在工件π 的表面上可形成漸層的效果，如較淡的顏色2〇1及較 顏色202。 本實施例中，上述累積的光能量只需要達到肉眼可觀 察到的褪色即可，舉例說明之，以波長365_，能量為125 mW/cmA2的紫光線光源，以鋁作為基材的工件，距離u 公分’分別照射5、10、15、20分鐘，即可使陽極處理後 的色層產生足夠目視的顏色的變化。上述顏色的變化，在 纟更大能量的光源、’或更短的波長，或更短的距離，都可 2再縮短變色的時間。本發明龍色條件，以波長⑽ f驗’當累積光能量朗毫焦耳㈣即可產生變色的 -效果。當配合具有不同遮蔽程度（例如漸層）的遮蔽件3 〇， 工件的表面即可形成漸層的效果。 此外，本實施例中，進一步還可以包括—不透光的遮 7/16 201245501 罩綱，以該遮I 304局部覆蓋於該工件2〇的 3〇4本身可以具有_，如 遮罩 雪早吝。从士描门也 口 1 f所不的A ’可應用於 304。上述遮罩3〇4可以早 ^夕遮罩 膠、或遮蔽模型件以置放於膠帶、可剝 成本低廉，操作簡單，無殘留痕跡一種方^點在於 剝膠㈣祕歸)經由印刷的方式形成遮罩t於Ζ 2 0上’並且可印刷成一圖形_ 刷電路板要保護的部份，是-種呈液狀的保 勝後’可進行供乾的步驟，以使可_= 遮敝㈣件可以是以耐光線照射的材料製成，以重 覆使用’例如是-金屬製成之標誌(iogo)。 上述遮罩304可以單獨使用，被遮罩304遮住的地方， 未經光線破壞’呈現色層·的原色，並依遮罩3〇4的形 狀而形成隨’例如圖式巾的A，而未被遮住的地方即 以使工件20產生另外較淡的顏色。上述遮罩3〇4也可以配 合使用遮蔽件30-起使用，而同時具有全面漸層色效果及 產生圖案的局部效果。 [第二實施方式] 請參考圖2,為本發明之工件表面的光致變色方法的第 二實施方式的結構示意圖。 此實施例與前述的差異在於進一步提供一對位於該工 件20側邊的遮蔽件30a、30b ’以及一對側邊的光源i〇a、 10b位於該對遮蔽件30a、30b的外側，藉此即可使工件2〇 的側邊也形成漸層色的效果。此處所指的遮蔽件，如同上 面所述的，可以是網版、濾光片或者玻璃片。為著固定側 8/16 201245501 邊的遮蔽件30a、30b及頂部的遮蔽件30，本實施例可進〆 步提供—框架型的固定件32 ’使遮蔽件30、30a、30b可拆 '· 卸式固定於該固定件32上。 相較於圖1 ’本實施例在工件2〇的表面產生全面範圍 之漸層變色的效果。 [第三實施方式] 請參考圖3，為本發明之工件表面的光致變色方法的第 二實施方式的結構示意圖。本第三實施例包括的步驟如下： ⑻提供一工件20 ; (b)形成一色層於該工件2〇的表面； (e)置玫具有該色層的該工件2〇於—支撐架5〇上；此實施 例中為斜放該工件20，該支撐架50形成一傾斜面而允許= 件20呈斜放狀態，支撐架50可以呈三角形或L形，而形 成可供置放工件20的傾斜面。 夕 (d) 提供一光源】〇 ’設於該工件20的上方； (e) 由該光源10提供光線，照射於該工件2〇的該 預定的時間。 本實施例與前述實施例的差異在於，不需遮蔽件 使工件20呈斜向擺設’直接照射於該卫件2()的該表 • 預定的時間。然而由於傾斜擺放工件2〇，工件2〇的 . 與光源10具有不同的距離，如圖式之較短的第一距離^】面 及較長的第二距離D2。藉由不同距離，照射於工件2〇 、 的光線的強度即產生強弱的區別，在較短的第一距離D1上 接受較強的光線能量而產生淡色201的效果，而在_ 心 第二距離D2處接受較弱的光線能量而產生深色2〇2乂、的 果。 的致 9/16 201245501 本實施例的優點在於更節省成本，不需要遮蔽件即可 使工件20的不同位置接受不同的光線能量，而使工件2〇 的表面得以產生漸層色的效果。 當然本實施例也可以進一步包括提供一遮罩（未圖 示），並且以該遮罩局部覆蓋於該工件的該表面。 若工件20的側邊也需要變色，也可以於工件2〇的 側邊提供光源。 [第四實施方式] °月參考圖4 ’為本發明之工件表面的光致變色方法的第 四實施方式的示意圖。本實施例相較於上述實施例，提供 可。周整角度的支稽架50 ’其包括一承載板5丨及一樞接 方;承載板51的底板52’在承載板51形成可置放工件2〇的 傾斜面。树齡m-鉸鏈裝£ 54連接於承載板51及底 板52 ’使承載板51與底板52之間的失角θ可以調整，承 載板51與底板52之間必要時可以設置一支撐件。 本實施例另-特點在於進—步包括—旋轉台6〇位於支 撐架50’的下方，旋轉台60可相對於平台4〇旋轉，以使工 件20得以旋轉。配合旋轉台6G，本實 可以進-步設有-對夾持件5〗2以夾持於工件2〇的兩側 以避免工件20在旋轉中搖動。 [第五實施方式] 請參閱圖5,為本發明之工件表面的光致變色方法的第 五實施方式的示意圖。此實施_示本發明可固定工件如 而移動光源刚的作法’利用移動光源刚也可在工件加 的表面形成不同的照射程度而產生顏色改變的效果 1〇d可以外加一罩體12以限制光線的照射範圍。特別說明 10/16 201245501 的疋圖中光源1Gd與工件2〇的距離僅為示意說明，實^ 上可以是更貼近工件20。 ’、 、。/匕實施例中，可進一步設置一對軌道34，使光源1〇d 沿者執道34移動。當然可以設置動力機構以供移動光線 刚’例如馬達等’也可以利用電腦控制其移動的情形。例 如光源10d的移動速度v可以在一些地方較慢地移動以知 長照射的時間’使光致變色的程度較大；光源l〇d也可移 動較快速以減少照射的時間，而減少光致變色的程度。> 旦本發明亦可針對光源進行調整控制以改變其輸出的能 里二例如可以調整光源的電流、光的頻率、脈衝寬度、照 射蚪間…專以調整光線的輸出能量，以控制變色的程度。 [第六實施方式] 凊簽閱圖6,為本發明之工件表面的光致變色方法的第 /、汽把方式的示意圖。此實施例提供一的遮蔽層設在 工件.20的表面或上方係可全面地遮蔽工件2〇，遮蔽層 。又有局部鏤空部305，如圖式中的文字jc。遮蔽層3〇e可以 疋一可遮光的板體，如金屬板或其他板體等，而可供重覆 使用；也可以是如上述的可剝膠。本實施例利用一局部性 的光源10e，例如可以是雷射、紅外線或紫外線發光二極 體，僅照射鏤空部305。此實施例說明本發明在某些應用的 條件下可應用局部的光源，而不需要全面性的照射。該光 源】〇e、遮蔽層30e與工件2〇三者之間的距離視需要的條 件而可以調整。 小是以，透過本發明工件表面的光致變色方法，具有至 少下述之特點及功能。本發明以光線照射在工件（殼體） 的表面以產生不_色或漸層色，可⑽金屬殼體維持其 11/16 201245501 金屬光澤、及金屬觸感，不會破壞其表 的製造時間短，適合大量生產。 “本發明 惟以上所述僅為本發明之較佳可 揭限本發明之專利範圍，频π j _非因此即 内―制本㈣朗書及圖式 ^ ^ '^b 1 【圖式簡單說明】 實施方式 ^ 1為本㈣之工件表面的光致變色方法的第一 的結構示意圖。 圖 的結i本::。之工件表面的光致變色方法的第如 圖 的結^之I件表面的光致變色方法的第三實施方式 =為本㈣之卫件表面的紐變色方法的第四實施方式 的結構示意圖。 ^ 本發明之卫件表面的紐變色方法的第五實施方式 的示意圖。 =6 ^本發明之工件表面的光致變色方法的第施 的不意圖。 【主要元件符號說明】 光源 10、10a、10b、 罩體 工件 10d 、 10e 12 20 色層..................... 遮蔽件..............30、30a、30b 顏色 201 、 202 12/16 201245501 遮蔽層..............30e 鏤空部..............305 固定件..............32 執道..................34 遮蔽處..............301、302 遮罩 304 平台..................40 支撐架..............50、50’ 夾持件..............512 底板..................52 鉸鏈裝置..........54 旋轉台..............60 距離..................Dl、D2 13/16Shot at least - the shield 3 . The above workpiece 2 can be made of metal and can be used as a casing for electronic products. In the case of providing the frequency (8) towel of the I piece, the step of cleaning the workpiece ^, for example, degreasing, that is, removing the grease on the surface of the workpiece, and soiling can be further carried out; after degreasing, the alkali washing can be further performed (alkaHne etching). In order to remove the natural oxidation of the surface of the workpiece and expose the workpiece to a pure metal substrate, it facilitates the formation of the anodic film and obtains a higher quality film. Subsequent chemical polishing, chemical etching or chemical etching, surface adjuSt can also be used. Chemical polishing is to chemically improve the surface flatness, increase the surface gloss of the metal substrate, and obtain a brighter surface; the pear ground is to increase the surface roughness to achieve a matte surface or similar to sandblasting; pickling is to remove After the pretreatment, the residual ash on the surface of the workpiece and the removal of the chemical agent remaining in the previous process can increase the cleanliness of the surface of the workpiece to facilitate the anodizing process. In the step (b) of forming the color layer, the workpiece 20 is used as the casing of the electronic device, and the casing is made of aluminum, and the color layer of the surface is good for anodizing dyeing. It includes (bl) anodizing, (b2) 5/16 201245501 dyeing, and (b3) sealing. In the above anodizing treatment, first, the aluminum workpiece is immersed in an electrolytic solution as an anode. The electrolyte solution may be an acid electrolyte. For example, the electrolyte can be sulphuric acid. After the anodizing treatment, anodized film is formed on the surface of the king member 2 (), and the anodized film is composed of a plurality of hexagonal unit cells perpendicular to the metal surface, each cell center, having a film hole, and having Extremely strong adsorption. After the anodizing treatment, water washing was performed to clear the surface of the red member 2Q. Dyeing is the immersion of the oxidized aluminum workpiece into the dyed molecules through the observation of the oxygen (Ti) = into difficult to separate covalent and ionic bonds. /, 虱化膜-shaped sealing treatment 'for example, steam sealing, hot water sealing, medium temperature sealing, for = dye is more difficult to towel, the same increase to increase oxidation __, Cai mill, etc. Less than 1 from the desmut, to > · leave the sealing liquid, and remove surface impurities; blowing (four): evening water: recognize, the surface of the material to dry (dry) 'to keep the surface of the workpiece dry. In the step (4), it is also possible to provide the side of the m 20 as needed to illuminate the side of the workpiece 2〇. In the "10 escaping =):: The shielding member 30 can be a different shaded area, and the concealer of different degrees of light blushing or more than _ship 3 () 2 is formed by Different sizes of _^^. If the film is on the screen, the masking of different degrees of density is made of heat-resistant material to withstand the heat generated by step (f). - The present invention causes the color layer 200 of the workpiece 20 to be colored by the irradiation of light. The principle of the fourth principle is that 'when the light of the wavelength is transmitted through the shielding member 3G to the surface of the workpiece 2G for a predetermined time, the light energy is accumulated to a certain amount, and the light destroys the molecules of the color layer, causing the color to change. light. Light can be ultraviolet, infrared or laser light, such as short-range '300~_nm) 'medium range (four) also '28〇~315 or remote (far '100~280 nm) ultraviolet light, where the shorter the ultraviolet wavelength, the higher the energy intensity Strong, the shorter the time needed. The ultraviolet light source is usually a lamp tube or a light-emitting body (UV LED). The lamp tube is suitable for large-area illumination applications, and the light-emitting diode is suitable for small-area local illumination applications; the laser light source is usually small, suitable for local illumination. use. Further, by the shielding members 30 having different dense shielding portions, the degree of different shielding is caused, so that a gradation effect such as a lighter color 2〇1 and a smaller color 202 can be formed on the surface of the workpiece π. In this embodiment, the accumulated light energy only needs to reach the fading which can be observed by the naked eye. For example, a purple light source with a wavelength of 365_, an energy of 125 mW/cmA2, and a workpiece with aluminum as a substrate, the distance u centimeters are irradiated for 5, 10, 15, and 20 minutes, respectively, to produce a sufficiently visual change in the color of the anodized color layer. The above color changes, in the case of a larger energy source, or a shorter wavelength, or a shorter distance, can shorten the time of discoloration. The dragon condition of the present invention, at a wavelength (10) f, is effective when the cumulative light energy is a millijoule (four). When mating the shield 3 具有 with different degree of shading (for example, gradation), the surface of the workpiece can form a gradation effect. In addition, in this embodiment, the opaque cover 7/16 201245501 cover can be further included, and the cover 314 can partially have the cover 本身4 itself, such as a mask snow early. stingy. A' can't be applied to 304 from the mouth of the mouth. The above-mentioned mask 3〇4 can cover the glue or mask the model piece to be placed on the tape, the peeling cost is low, the operation is simple, and there is no residual trace. The point is that the peeling glue (4) secretly returns) Forming a mask t on Ζ2 0' and printing it into a pattern _ The part to be protected by the brush circuit board is a liquid-like step of 'supplied' to make it dry, so that _= concealer (4) The piece may be made of a material that is resistant to light and is used repeatedly to 'for example, an ogo made of metal. The above-mentioned mask 304 can be used alone, and is covered by the mask 304, and the original color of the color layer is not destroyed by the light, and is formed according to the shape of the mask 3〇4, for example, A of the pattern towel. The uncovered area is such that the workpiece 20 produces an additional lighter color. The above-mentioned mask 3〇4 can also be used in conjunction with the shield member 30, while having a full gradation effect and a partial effect of generating a pattern. [Second Embodiment] Please refer to Fig. 2, which is a schematic structural view of a second embodiment of a photochromic method on the surface of a workpiece of the present invention. This embodiment differs from the foregoing in that a pair of shielding members 30a, 30b' on the side of the workpiece 20 and a pair of side light sources i?a, 10b are provided outside the pair of shielding members 30a, 30b, whereby The side of the workpiece 2〇 can also be formed into a gradient color effect. The shield referred to herein, as described above, may be a screen, a filter or a glass sheet. For the fixed side 8/16 201245501 side shielding members 30a, 30b and the top shielding member 30, the embodiment can be provided in a step-by-frame type fixing member 32' to make the shielding members 30, 30a, 30b detachable. The unloading type is fixed to the fixing member 32. Compared to Fig. 1 ' this embodiment produces a full range of gradation discoloration effects on the surface of the workpiece 2〇. [THIRD EMBODIMENT] Please refer to Fig. 3, which is a schematic structural view of a second embodiment of a photochromic method on the surface of a workpiece of the present invention. The third embodiment comprises the following steps: (8) providing a workpiece 20; (b) forming a color layer on the surface of the workpiece 2; (e) placing the workpiece having the color layer on the support frame 5〇 In this embodiment, the workpiece 20 is obliquely placed, and the support frame 50 forms an inclined surface to allow the member 20 to be placed obliquely. The support frame 50 may be triangular or L-shaped to form a workpiece 20 for placement. Inclined surface. In the evening (d), a light source 〇 ’ is provided above the workpiece 20; (e) light is supplied from the light source 10 to illuminate the workpiece 2 该 for the predetermined time. The difference between this embodiment and the foregoing embodiment is that the workpiece 20 is obliquely disposed 'without the shield' directly irradiated to the watch of the guard 2 () for a predetermined period of time. However, since the workpiece 2 is tilted, the workpiece 2 has a different distance from the light source 10, such as a shorter first distance surface and a longer second distance D2. By different distances, the intensity of the light illuminating the workpiece 2 即 produces a difference between strong and weak, receiving a stronger light energy at a shorter first distance D1 to produce a light color 201 effect, and a second distance at the _ heart D2 receives weaker light energy and produces darker 2〇2乂. 9/16 201245501 The advantage of this embodiment is that it is more cost-effective, and different positions of the workpiece 20 can be received with different light energy without the need for a shield, so that the surface of the workpiece 2 can be subjected to a gradation effect. Of course, this embodiment may further include providing a mask (not shown) and partially covering the surface of the workpiece with the mask. If the side of the workpiece 20 also needs to be discolored, a light source can also be provided on the side of the workpiece 2〇. [Fourth embodiment] Fig. 4 is a schematic view showing a fourth embodiment of the photochromic method of the surface of the workpiece of the present invention. This embodiment is provided in comparison with the above embodiment. The circumferential angled bracket 50' includes a carrier plate 5'' and a pivotal joint; the bottom plate 52' of the carrier plate 51 forms an inclined surface on the carrier plate 51 on which the workpiece 2 can be placed. The tree-aged m-hinge mount 54 is attached to the carrier plate 51 and the bottom plate 52' so that the loss angle θ between the carrier plate 51 and the bottom plate 52 can be adjusted, and a support member can be disposed between the carrier plate 51 and the bottom plate 52 as necessary. The present embodiment is further characterized in that the further step comprises - the rotary table 6 is located below the support frame 50', and the rotary table 60 is rotatable relative to the platform 4 to allow the workpiece 20 to be rotated. In conjunction with the rotary table 6G, it is possible to carry out the step-to-holding member 5 to clamp on both sides of the workpiece 2 to prevent the workpiece 20 from rocking during rotation. [Fifth Embodiment] Please refer to Fig. 5, which is a schematic view showing a fifth embodiment of a photochromic method on the surface of a workpiece of the present invention. This embodiment shows that the present invention can fix the workpiece, such as moving the light source. The effect of using the moving light source to form a different degree of illumination on the surface of the workpiece to produce a color change can be added to the cover 12 to limit The range of illumination of the light. Special Note 10/16 201245501 The distance between the light source 1Gd and the workpiece 2〇 is only a schematic illustration, which can be closer to the workpiece 20. ', ,. In the embodiment, a pair of rails 34 may be further provided to move the light source 1 〇d along the trajectory 34. It is of course possible to provide a power mechanism for moving light, such as a motor or the like, or to control the movement thereof by a computer. For example, the moving speed v of the light source 10d can be moved slowly in some places to make the length of the irradiation longer to make the degree of photochromism larger; the light source l〇d can also move faster to reduce the irradiation time, and reduce the light-induced The degree of discoloration. > The present invention can also adjust the control of the light source to change the energy of the output. For example, the current of the light source, the frequency of the light, the pulse width, and the illumination time can be adjusted to adjust the output energy of the light to control the color change. degree. [Sixth embodiment] Fig. 6 is a schematic view showing the /th and steamer method of the photochromic method on the surface of the workpiece of the present invention. This embodiment provides a shielding layer disposed on or above the surface of the workpiece 20. to substantially shield the workpiece 2, the shielding layer. There is also a partial hollow portion 305, which is the text jc in the figure. The shielding layer 3〇e may be a light-shielding plate body, such as a metal plate or other plate body, for repeated use; or may be peelable glue as described above. This embodiment utilizes a local light source 10e, such as a laser, infrared or ultraviolet light emitting diode, to illuminate only the hollow portion 305. This embodiment illustrates that the present invention can be applied to local light sources under certain application conditions without the need for comprehensive illumination. The distance between the light source 〇e, the shielding layer 30e and the workpiece 2 can be adjusted depending on the required conditions. Smaller, the photochromic method through the surface of the workpiece of the present invention has at least the following features and functions. The invention irradiates light on the surface of the workpiece (housing) to produce a non-color or gradient color, and the (10) metal casing maintains its 11/16 201245501 metallic luster and metallic touch without damaging the manufacturing time of the watch. Short, suitable for mass production. The invention is only the preferred scope of the present invention, and the frequency range is π j _ is not the inner-system (4) the book and the pattern ^ ^ '^b 1 Description] Embodiment 1 is the first structural schematic diagram of the photochromic method on the surface of the workpiece according to (4). The junction of the figure: the photochromic method on the surface of the workpiece is shown in the figure Third Embodiment of Photochromic Method of Surface = Schematic diagram of the fourth embodiment of the method for changing the color of the surface of the guard of the present invention (4). = 6 ^ The first application of the photochromic method on the surface of the workpiece of the present invention. [Main element symbol description] Light source 10, 10a, 10b, cover workpiece 10d, 10e 12 20 color layer... ............... Shielding parts..............30, 30a, 30b Color 201, 202 12/16 201245501 Shielding layer.... ..........30e hollow part..............305 Fixing parts..............32 Exorcism... ...............34 Shading place..............301,302 Mask 304 Platform........ ..........40 Support frame..............50,50' Clamping parts..............512 bottom plate ..................52 Hinge device..........54 Rotary table..............60 Distance ..................Dl, D2 13/16