13.27715 複數呈陣列排布之顯示單元120。該磁性筆11包括一第一 端部112及一與該第一端部ι12相對之第二端部114’該第 一端部112為N極，該第二端部114為S極。該磁性筆11 可以係圓柱形，方形或其他形狀，最好選擇方便使用者使 用及符合人體工學的形狀，在本實施例中，該磁性筆11為 圓柱狀筆形結構。13.27715 A plurality of display units 120 arranged in an array. The magnetic pen 11 includes a first end portion 112 and a second end portion 114' opposite the first end portion ι12. The first end portion 112 is an N pole, and the second end portion 114 is an S pole. The magnetic pen 11 may be cylindrical, square or other shape, and is preferably selected for user convenience and ergonomic shape. In the present embodiment, the magnetic pen 11 is a cylindrical pen-shaped structure.
請同時參見圖2與圖3，該顯示單元120包括一發光 單元121 ’ 一開關單元122及—固定板123，該發光單元 121設置於該固定板123之一側，該開關單元U2設置於 該固定板123中並與該發光單元ι21相對。 該發光單元121包括一第一電極1211，一第二電極 1212，一發光體1213，一導線1214，一反射板1215。 該第一電極1211與該第二電極1212並列設置於該反 射板1215之底部並與該固定板123相連，該發光體1213 没置於該第一電極1211上且與該固定板123相對，該導線 m4之兩端分別與5彡發光H 1213及鮮二電極1212相 連。該發光體m3與該導線1214的上方即遠離該固定板 123之-側具有-開口 1216’ ;^該開口 m6中可以填充透 明膠體1217。該發光體切3 ▼以係發光二極體（Ught Emitting Diode, LED)，有地，心 ’磯發光二極體（Organic LightReferring to FIG. 2 and FIG. 3, the display unit 120 includes a light-emitting unit 121', a switch unit 122, and a fixing plate 123. The light-emitting unit 121 is disposed on one side of the fixed plate 123, and the switch unit U2 is disposed on the switch unit U2. The fixing plate 123 is opposed to the light emitting unit ι21. The light emitting unit 121 includes a first electrode 1211, a second electrode 1212, an illuminant 1213, a wire 1214, and a reflector 1215. The first electrode 1211 and the second electrode 1212 are disposed in parallel with the bottom of the reflector 1215 and connected to the fixing plate 123. The illuminant 1213 is not disposed on the first electrode 1211 and opposite to the fixing plate 123. Both ends of the wire m4 are respectively connected to the 5 彡 light-emitting H 1213 and the fresh second electrode 1212. The illuminant m3 and the side of the wire 1214, that is, the side away from the fixing plate 123, have an opening 1216'; the opening m6 can be filled with a transparent colloid 1217. The illuminator cuts 3 ▼ to the Ught Emitting Diode (LED), the ground, the heart ‘Lighting diode (Organic Light)
EmiUing D喊⑽戦W電致發光元件，在本實施例 中，該發光體m3為咖。^口㈣可為圓形，、㈣ 或適合實際需要之其他形狀。讀反射板1215可以將該發光 9 的光反射使光線更好的彳（該開σ 1216出射。 元件單：^22包括—與該第1極1211相連之開關 〜與㈣關70件1221相鄰之磁體1222。該開 為導電材料所制，其包括片1223, ㈣m :片1225及一彈性片1227 ’該第-固定片1223 二=:固定片1225相對設置，該第-固定片m3之— 端了…弟兒極1211相連，該彈性片1227之一端與該第 ^定γ 1225之一端相連，該彈性片1227之另一端可與 „玄第口夂片1223之另一端相連，該第二固定片^25之 另鈿用乂與外電源相連，在不受外力作用的情況下，該 彈性片^227之另—端與該第一固定片1223之另—端處於 分離狀怨。可以理解的是，該第二固定片1225與該彈性片 1227可為一體結構。 /、體1222可為鐵氧體磁石、紹錄始磁石、欽鐵爛磁 石或知始磁石等，在本實施例中，該磁體1222為鐵氧體磁 石；該磁體1222可為圓柱形，方形或其他形狀，在本實施 例中’該磁體1222為圓柱形。 該固定板123中具有一收容部1231，該收容部1231 設置於與該發光單元121相對之一側，該開關元件1221位 於該收容部1231側壁，該磁體1222設置於該收容部1231 内，該磁體1222在未受外加磁力作用時與該第二固定片 1225相接觸。 當該第二電極1212接一正電壓，該開關元件1221之 1327715 • 第二固定片1225接一負電壓時，該磁性筆11之第一端部 112靠近該發光體1213且其與該發光體1213相鄰近時， • 該磁體1222會於該第一端部112對其的異性相吸的作用力 - 下沿該固定板123之收容部1231以靠近該磁性筆11的方 式移動到該發光體1213之下方，使該開關元件1221之彈 性片1227與該第一固定片1223相接觸，從而使該發光體 1213所處之電氣回路導通進而使其點亮，所以該磁性筆11 $ 之第一端部112靠近不同的顯示單元120後均使該不同的 顯示單元120所包括之發光體1213點亮，從而由該點亮之 顯示單元120構成之影像即為所要顯示的資訊。 由此可見，該顯示裝置10藉由其包括之顯示模組12 中複數顯示單元120點亮所構成之影像來顯示資訊，不需 要粉筆或白板筆，從而不會有損人體健康及污染環境。 另外，該磁性筆11之第二端部114靠近已點亮之發光 體1213且其與該已點亮之發光體1213相鄰近時，該磁體 • 1222會於該第二端部114對其的同性相斥的作用力下沿該 固定板123之收容部1231以遠離該磁性筆11之方式移動 以與該第二固定片1225相接觸，則該開關元件1221之彈 性片1227彈起以與該第一固定片1223分離，從而使該發 光體1213所處之電氣回路斷開進而使其熄滅，所以該磁性 筆11之第二端部114靠近不同的已點亮之顯示單元120後 均使該不同的已點亮之顯示單元120所包括之發光體1213 熄滅，從而由該已點亮之顯示單元120所構成之影像即所 11 B27715 • 顯示的資訊被擦除。 請同時參見圖4與圖5,本發明第二實施例提供之顯 • 示裝置20，其與上述第一實施例提供之顯示裝置10基本 • 相同，其不同之處在於：該顯示裝置20包括複數呈陣列排 布之顯示單元220。該第二固定片1225之一端與該第一電 極1211相連，該第二固定片1225之另一端與該彈性片1227 之一端相連，該彈性片1227之另一端可與該第一固定片 ^ 1223之一端相連，該第一固定片1223之另一端用以與外 電源相連，在不受外力作用的情況下，該彈性片1227之另 一端與該第一固定片1223之一端處於分離狀態。 當該第二電極1212接一負電壓，該開關元件2221之 第一固定片1223之另一端接一正電壓時，該磁性筆11之 第二端部114靠近該發光體1213且其與該發光體1213相 鄰近時，該磁體1222會於該磁性筆11之第二端部114對 其的同性相斥的作用力下沿該固定板123以遠離該磁性筆 • 11的方式移動以與該第一固定片1223及該彈性片1227接 觸，使該開關元件2221之彈性片1227與該第一固定片1223 相接觸，從而使該發光體1213所處之電氣回路導通進而使 其點亮，所以該磁性筆11靠近不同的顯示單元220後均使 該不同之顯示單元220所包括之發光體1213點亮，從而由 該點亮之顯示單元220構成之影像即為所要顯示的資訊。 請同時參見圖6與圖7,本發明第三實施例提供之顯 示裝置30，其與上述第一實施例提供之顯示裝置10基本 12 1327715 相同，其不同之處在於：該顯示裝置30包括複數呈陣列排 布之顯示單元320,該顯示單元320包括一開關單元322， • 該開關單元322包括一開關元件3221，該開關元件3221 - 包括第一固定片3223及一與該第一固定片3223相對且分 離設置之第二固定片3225,該第一固定片3223之一端與 該第一電極1211相連，該第一固定片3223之另一端與該 第二固定片3225之一端相對，該第二固定片3225之另一 I 端用以與外電源相連，在不受外加磁力作用時，該磁體1222 與該第一固定片3223及第二固定片3225相接觸；該固定 板123具有一個一端與該第二電極1212相連且沿收容部 1231之延伸方向延伸之導電體1232，該導電體1232鄰近 該磁體1222之一側設置有絕緣層1233，該磁體1222可與 該絕緣層1233相接觸。 當該導電體1232之另一端接一正電壓，該開關元件 3221之第二固定片3225之另一端接一負電壓時，該發光 # 體1213所處之電氣回路導通進而使其點亮，該磁性筆11 之第二端部114靠近該發光體1213且其與該發光體1213 相鄰近時，該磁體1222會於該第二端部114對其的同性相 斥的作用力下沿該固定板123之收容部1231以遠離該磁性 筆11的方式移動以與該第一固定片3223分離，從而使該 發光體1213所處之電氣回路斷開進而使其熄滅，所以該磁 性筆11之第二端部114靠近不同之顯示單元320後均使該 不同之顯示單元320所包括之發光體1213熄滅，從而由該 13 1327715 • 媳滅之顯示單元320構成之影像即為所要顯示的資訊。 5青同時參見圖8與圖9 ’本發明第四實施例提供之顯 . 不裝置4〇 ’其與上述第一實施例提供之顯示裝置基本 - 相同’其不同之處在於：該顯示裝置40包括複數呈陣列排 布之顯示單元420，該顯示單元420包括一發光單元421， 一開關單元422, 一第一電路板424, 一第二電路板425 ; 該發光單元421設置於該第一電路板424之一側，該 φ 發光單元421包括一第一電極4211，一第二電極4212及 一發光體1213，該第一電極4211與該第二電極4212分別 包括位於該第—電路板424兩側之兩部分且藉由該第一電 路板424中之導孔4241相連； 該固定板123設置於該第一電路板424之另一側，該 固定板123具有一與該第二電極4212相連且沿收容部1231 之延伸方向延伸之導電體4232，於該導電體4232鄰近該 磁體1222之一側設置有絕緣層1233，同時該第二電極4212 # 之鄰近該固定板123的部分與該第一電極4211相對之一側 也可設置有絕緣層1233 ; 該開關單元422包括一開關元件4221，該開關元件 4221包括第一固定片4223、第二固定片1225及一彈性片 1227，該第一固定片4223之一端與該第一電極4211鄰近 該固定板123的部分相連，該彈性片1227之一端與該第二 固定片1225之一端相連，該彈性片1227之另一端可與該 第一固定片4223之另一端相連，在不受外力作用的情況 14 13-27715 • 下，該彈性片1227之另一端與該第一固定片4223之另一 端處於分離狀態； ' 該第二電路板425設置於該固定板123之與該第一電 - 路板424相對之一側，該第二電路板425包括第一導線4251 與第二導線4252，該第一導線4251與該第二固定片1225 之另一端相連通，該第二導線4252與該導電體4232相連 通； ^ 當該第一導線4251接一負電壓時，該第二導線4252 接一正電壓，該磁性筆11靠近該發光體1213且其與該發 光體1213相鄰近時，該磁體1222會於該磁性筆11對其之 異性相吸的作用力下沿該固定板123之收容部1231以靠近 該磁性筆11的方式移動以與該第一固定片4223及該彈性 片1227接觸，使該開關元件4221之彈性片1227與該第一 固定片4223相接觸，從而使該發光體1213所處之電氣回 路導通進而使其點亮，所以該磁性筆11靠近不同的顯示單 • 元420後均使該不同的顯示單元420所包括之發光體1213 點亮，從而由該點亮之顯示單元420構成之影像即為所要 顯示的資訊。 該第一電路板424與該第二電路板425均可為玻璃纖 維板，軟性電路板，陶瓷板或其他類型之電路板。 請同時參見圖8與圖9,本發明第五實施例提供一種 利用顯示裝置40顯示資訊的方法，該方法包括： 將該第一導線4251接一負電壓，該第二導線4252接 15 13.27715 • 一正電壓； 將磁性筆11靠近不同的顯示單元420，使該不同的顯 ’ 示單元420所包括之磁體1222於該磁性筆11對其的異性 • 相吸的作用力下以靠近該磁性筆11的方式移動以與該第 一固定片4223及該彈性片1227接觸，使該開關元件4221 之彈性片1227與該第一固定片4223相接觸，從而使該發 光體1213所處之電氣回路導通進而使其點亮，由該點亮之 $ 顯示單元420構成之影像即為所要顯示的資訊。 該顯示資訊的方法藉由該磁性筆11靠近不同的顯示 單元420使其所包括之發光體1213點亮，由複數點亮之顯 示單元420所構成之影像來顯示資訊，不需要粉筆或白板 筆，從而不會有損人體健康及污染環境。 請同時參見圖6與圖7,本發明第六實施例提供一種 利用顯示裝置30顯示資訊的方法，該方法包括： 將該固定板123中之導電體1232接一正電壓及將該開 • 關元件3221之第二固定片3225接一負電壓； 將磁性筆11靠近不同的顯示單元320，使該不同的顯 示單元320所包括之磁體1222於該磁性筆11對其的同性 相斥的作用力下以遠離該磁性筆11的方式移動以與該第 一固定片3223分離，使該發光體1213所處之電氣回路斷 開進而使其熄滅，由該熄滅之顯示單元320構成之影像即 為所要顯示的資訊。 該顯示資訊的方法藉由該磁性筆11靠近不同的顯示 16 1327715 • 單元320使其所包括之發光體1213熄滅，由複數熄滅之顯 示單元320所構成之影像來顯示資訊，不需要粉筆或白板 • 筆，從而不會有損人體健康及污染環境。 - 本發明確已符合發明專利要件，爰依法提出專利申 請。惟，以上所述者僅為本發明之較佳實施例，舉凡熟悉 本案技藝之人士，於援依本案發明精神所作之等效修飾或 變化，皆應包含於以下之申請專利範圍内。 $ 【圖式簡單說明】 圖1係本發明第一實施例提供之顯示裝置之局部立體 示意圖。 圖2係圖1中顯示單元之正視圖。 圖3係圖2中顯示單元沿III-III之剖面圖。 圖4係本發明第二實施例提供之顯示裝置之局部立體 示意圖。 圖5係圖4中顯示單元之剖面圖。 • 圖6係本發明第三實施例提供之顯示裝置之局部立體 示意圖。 圖7係圖6中顯示單元之剖面圖。 圖8係本發明第四實施例提供之顯示裝置之局部立體 示意圖。 圖9係圖8中顯示單元之剖面圖。 【主要元件符號說明】 17 13-27715 顯示裝置 10,20,30,40 磁性筆 11 顯示模組 12 顯示單元 120,220,320,420 第一端部 112 第二端部 114 發光單元 121,421 開關單元 122,322,422 固定板 123 第一電極 1211,4211 第二電極 1212,4212 發光體 1213 導線 1214 反射板 1215 開口 1216 透明膠體 1217 彈性片 1227 磁體 1222 第一電路板 424 第二固定片 1225,3225 導孔 4241 收容部 1231 絕緣層 1233 第二電路板 425 第二導線 4252 導電體 4232 第一導線 4251 第一固定片 1223,3223,4223 開關元件 1221,2221,3221,4221 18EmiUing D calls the (10) 电W electroluminescent element. In the present embodiment, the illuminant m3 is a coffee. ^ (4) can be round, (4) or other shapes suitable for actual needs. The read reflector 1215 can reflect the light of the light 9 to make the light better (the opening σ 1216 is emitted. The component single: ^22 includes - the switch connected to the first pole 1211 is adjacent to the (four) off 70 piece 1221 The magnet 1222 is made of a conductive material, and includes a sheet 1223, (4) m: a sheet 1225 and an elastic sheet 1227. The first fixing piece 1223 2=: the fixing piece 1225 is oppositely disposed, and the first fixing piece m3 is The other end of the elastic piece 1227 is connected to one end of the first γ 1225, and the other end of the elastic piece 1227 can be connected to the other end of the sinusoidal slab 1223, the second The other side of the fixing piece 25 is connected to the external power source, and the other end of the elastic piece 227 is separated from the other end of the first fixing piece 1223 without being subjected to an external force. The second fixing piece 1225 and the elastic piece 1227 may be a unitary structure. The body 1222 may be a ferrite magnet, a shovel magnet, a sinter magnet, or a magnet, etc., in this embodiment. The magnet 1222 is a ferrite magnet; the magnet 1222 can be cylindrical, square or other shape In the present embodiment, the magnet 1222 is cylindrical. The fixing plate 123 has a receiving portion 1231. The receiving portion 1231 is disposed on a side opposite to the light emitting unit 121. The switching element 1221 is located on the side wall of the receiving portion 1231. The magnet 1222 is disposed in the receiving portion 1231. The magnet 1222 is in contact with the second fixing piece 1225 when the magnetic force is not applied. When the second electrode 1212 is connected to a positive voltage, the switching element 1221 is 1327715. When the second fixing piece 1225 is connected to a negative voltage, when the first end 112 of the magnetic pen 11 is adjacent to the illuminant 1213 and adjacent to the illuminant 1213, the magnet 1222 will be at the first end 112. The absorbing force of the opposite side of the fixing plate 123 moves to the lower side of the illuminating body 1213 so as to be close to the illuminating body 1213, so that the elastic piece 1227 of the switching element 1221 and the first fixing portion The pieces 1223 are in contact with each other, so that the electrical circuit in which the illuminant 1213 is located is turned on to illuminate the light. Therefore, the first end portion 112 of the magnetic pen 11 $ is adjacent to the different display unit 120 to make the different display unit 120 Included The illuminant 1213 is illuminated, so that the image formed by the illuminating display unit 120 is the information to be displayed. It can be seen that the display device 10 is illuminated by the plurality of display units 120 in the display module 12 included therein. The formed image is used to display information, and no chalk or whiteboard pen is needed, so as not to damage human health and pollute the environment. In addition, the second end portion 114 of the magnetic pen 11 is adjacent to the illuminated illuminator 1213 and When the illuminated illuminators 1213 are adjacent to each other, the magnets 1222 will move away from the magnetic pen 11 along the accommodating portion 1231 of the fixing plate 123 under the force of the same end repelling the second end portion 114. Moving in contact with the second fixing piece 1225, the elastic piece 1227 of the switching element 1221 is popped up to be separated from the first fixing piece 1223, so that the electrical circuit in which the illuminating body 1213 is located is disconnected and extinguished. Therefore, after the second end portion 114 of the magnetic pen 11 is adjacent to the different illuminated display unit 120, the illuminant 1213 included in the different illuminated display unit 120 is turned off, thereby being illuminated. Display unit 120 Information to the image that is displayed in the 11 B27715 • be erased. Referring to FIG. 4 and FIG. 5, a display device 20 according to a second embodiment of the present invention is substantially the same as the display device 10 provided in the first embodiment, except that the display device 20 includes The plurality of display units 220 are arranged in an array. One end of the second fixing piece 1225 is connected to the first electrode 1211, and the other end of the second fixing piece 1225 is connected to one end of the elastic piece 1227. The other end of the elastic piece 1227 and the first fixing piece 1223 One end of the first fixing piece 1223 is connected to the external power source, and the other end of the elastic piece 1227 is separated from one end of the first fixing piece 1223 without being subjected to an external force. When the second electrode 1212 is connected to a negative voltage, and the other end of the first fixing piece 1223 of the switching element 2221 is connected to a positive voltage, the second end 114 of the magnetic pen 11 is adjacent to the illuminant 1213 and the illuminating portion thereof When the body 1213 is adjacent to the body 1212, the magnet 1222 moves along the fixing plate 123 away from the magnetic pen 11 under the force of the same end repelling by the second end portion 114 of the magnetic pen 11 to A fixing piece 1223 and the elastic piece 1227 are in contact with each other, so that the elastic piece 1227 of the switching element 2221 is in contact with the first fixing piece 1223, so that the electrical circuit in which the illuminating body 1213 is located is turned on to illuminate, so After the magnetic pen 11 is adjacent to the different display unit 220, the illuminant 1213 included in the different display unit 220 is illuminated, so that the image formed by the illuminated display unit 220 is the information to be displayed. Referring to FIG. 6 and FIG. 7 simultaneously, the display device 30 according to the third embodiment of the present invention is the same as the display device 10 provided in the first embodiment, substantially 12 1327715, except that the display device 30 includes a plurality of The display unit 320 is arranged in an array, and the display unit 320 includes a switch unit 322. The switch unit 322 includes a switch element 3221. The switch element 3221 includes a first fixing piece 3223 and a first fixing piece 3223. The second fixing piece 3225 is oppositely disposed, and one end of the first fixing piece 3223 is connected to the first electrode 1211, and the other end of the first fixing piece 3223 is opposite to one end of the second fixing piece 3225, the second The other end of the fixing piece 3225 is connected to the external power source, and the magnet 1222 is in contact with the first fixing piece 3223 and the second fixing piece 3225 when the magnetic force is not applied; the fixing plate 123 has one end and The second electrode 1212 is connected to the conductive body 1232 extending along the extending direction of the receiving portion 1231. The conductive body 1232 is disposed adjacent to one side of the magnet 1222 with an insulating layer 1233. The magnet 1222 and the insulating layer 123 3 phases of contact. When the other end of the conductor 1232 is connected to a positive voltage, and the other end of the second fixing piece 3225 of the switching element 3221 is connected to a negative voltage, the electrical circuit of the light-emitting body 1213 is turned on to turn on the light. When the second end portion 114 of the magnetic pen 11 is adjacent to the illuminant 1213 and adjacent to the illuminant 1213, the magnet 1222 will be along the fixing plate under the force of the same end repelling the second end portion 114. The accommodating portion 1231 of the 123 moves away from the magnetic pen 11 to be separated from the first fixing piece 3223, so that the electrical circuit in which the illuminant 1213 is located is disconnected and extinguished, so the second of the magnetic pen 11 After the end portion 114 is close to the different display unit 320, the illuminant 1213 included in the different display unit 320 is turned off, so that the image formed by the 13 1327715 annihilation display unit 320 is the information to be displayed. 5 is also referred to FIG. 8 and FIG. 9 'the fourth embodiment of the present invention. The non-device 4' is substantially the same as the display device provided in the first embodiment described above. The difference is that the display device 40 The display unit 420 includes a plurality of display units 420, and the display unit 420 includes a light-emitting unit 421, a switch unit 422, a first circuit board 424, and a second circuit board 425. The light-emitting unit 421 is disposed on the first circuit. On one side of the board 424, the φ illuminating unit 421 includes a first electrode 4211, a second electrode 4212 and an illuminant 1213. The first electrode 4211 and the second electrode 4212 are respectively disposed on the first circuit board 424. The two sides of the side are connected by the guiding holes 4241 in the first circuit board 424; the fixing plate 123 is disposed on the other side of the first circuit board 424, and the fixing plate 123 has a connection with the second electrode 4212. And an electric conductor 4232 extending along the extending direction of the receiving portion 1231, an insulating layer 1233 is disposed on a side of the electric conductor 4232 adjacent to the magnet 1222, and a portion of the second electrode 4212 adjacent to the fixing plate 123 and the first portion One electrode 4211 is opposite An insulating layer 1233 may be disposed on one side; the switching unit 422 includes a switching element 4221, and the switching element 4221 includes a first fixing piece 4223, a second fixing piece 1225, and an elastic piece 1227. One end of the first fixing piece 4223 One end of the first electrode 4211 is adjacent to the fixing plate 123. One end of the elastic piece 1227 is connected to one end of the second fixing piece 1225. The other end of the elastic piece 1227 can be connected to the other end of the first fixing piece 4223. Connected, in the case of no external force 14 13-27715 •, the other end of the elastic piece 1227 is separated from the other end of the first fixing piece 4223; 'The second circuit board 425 is disposed on the fixing plate 123 The second circuit board 425 includes a first conductive line 4251 and a second conductive line 4252. The first conductive line 4251 is in communication with the other end of the second fixing piece 1225. The second wire 4252 is in communication with the conductor 4232; ^ when the first wire 4251 is connected to a negative voltage, the second wire 4252 is connected to a positive voltage, and the magnetic pen 11 is adjacent to the illuminant 1213 and the illuminating portion thereof When the body 1213 is adjacent, The magnet 1222 moves along the accommodating portion 1231 of the fixing plate 123 in proximity to the magnetic pen 11 to contact the first fixing piece 4223 and the elastic piece 1227 under the force of the oppositely attracting the magnetic pen 11 . The elastic piece 1227 of the switching element 4221 is brought into contact with the first fixing piece 4223, so that the electrical circuit in which the illuminating body 1213 is located is turned on to illuminate, so that the magnetic pen 11 is close to different display sheets. After 420, the illuminant 1213 included in the different display unit 420 is illuminated, so that the image formed by the illuminating display unit 420 is the information to be displayed. The first circuit board 424 and the second circuit board 425 can each be a glass fiber board, a flexible circuit board, a ceramic board or other type of circuit board. Referring to FIG. 8 and FIG. 9 simultaneously, a fifth embodiment of the present invention provides a method for displaying information by using a display device 40. The method includes: connecting the first wire 4251 to a negative voltage, and the second wire 4252 is connected to 15.1331515. a positive voltage; the magnetic pen 11 is brought close to the different display unit 420, so that the magnet 1222 included in the different display unit 420 is placed under the force of the opposite polarity of the magnetic pen 11 to attract the magnetic pen 11 is moved to contact the first fixing piece 4223 and the elastic piece 1227, so that the elastic piece 1227 of the switching element 4221 is in contact with the first fixing piece 4223, so that the electrical circuit of the illuminating body 1213 is turned on. Further, it is lit, and the image formed by the illuminated $ display unit 420 is the information to be displayed. The method for displaying information is to light up the illuminant 1213 included by the magnetic pen 11 near the different display unit 420, and display information by the image formed by the plurality of illuminated display units 420, without chalk or whiteboard pen Therefore, it will not harm human health and pollute the environment. Referring to FIG. 6 and FIG. 7 simultaneously, a sixth embodiment of the present invention provides a method for displaying information by using the display device 30. The method includes: connecting the electrical conductor 1232 in the fixing plate 123 to a positive voltage and turning the switch on and off. The second fixing piece 3225 of the component 3221 is connected to a negative voltage; the magnetic pen 11 is brought close to the different display unit 320, so that the magnet 1222 included in the different display unit 320 is repelled by the magnetic pen 11 Moving away from the magnetic pen 11 to be separated from the first fixing piece 3223, the electrical circuit in which the illuminating body 1213 is located is disconnected and extinguished, and the image formed by the extinguishing display unit 320 is desired. The information displayed. The method for displaying information is that the magnetic pen 11 is close to different displays 16 1327715. The unit 320 is used to extinguish the included illuminant 1213, and the image formed by the plurality of extinguished display units 320 displays information without chalk or whiteboard. • Pen so that it does not harm human health and pollute the environment. - The invention has indeed met the requirements of the invention patent and has filed a patent application in accordance with the law. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partial perspective view of a display device according to a first embodiment of the present invention. Figure 2 is a front elevational view of the display unit of Figure 1. Figure 3 is a cross-sectional view of the display unit of Figure 2 taken along line III-III. Figure 4 is a partial perspective view of a display device according to a second embodiment of the present invention. Figure 5 is a cross-sectional view of the display unit of Figure 4. Figure 6 is a partial perspective view of a display device according to a third embodiment of the present invention. Figure 7 is a cross-sectional view of the display unit of Figure 6. Figure 8 is a partial perspective view of a display device according to a fourth embodiment of the present invention. Figure 9 is a cross-sectional view of the display unit of Figure 8. [Main component symbol description] 17 13-27715 Display device 10, 20, 30, 40 Magnetic pen 11 Display module 12 Display unit 120, 220, 320, 420 First end portion 112 Second end portion 114 Light-emitting unit 121, 421 Switch unit 122, 322, 422 Fixing plate 123 First Electrode 1211, 4211 second electrode 1212, 4212 illuminant 1213 wire 1214 reflector 1215 opening 1216 transparent colloid 1217 elastic piece 1227 magnet 1222 first circuit board 424 second fixing piece 1225, 3225 guide hole 4241 accommodating portion 1231 insulating layer 1233 Second circuit board 425 second wire 4252 conductor 4232 first wire 4251 first fixing piece 1223, 3223, 4223 switching element 1221, 2221, 3221, 4221 18