TW202341205A - Backlight keyswitch and backlight module thereof - Google Patents

Backlight keyswitch and backlight module thereof Download PDF

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Publication number
TW202341205A
TW202341205A TW112109798A TW112109798A TW202341205A TW 202341205 A TW202341205 A TW 202341205A TW 112109798 A TW112109798 A TW 112109798A TW 112109798 A TW112109798 A TW 112109798A TW 202341205 A TW202341205 A TW 202341205A
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Taiwan
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ink layer
backlight
light
circuit board
reflective ink
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TW112109798A
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Chinese (zh)
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黃恒儀
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達方電子股份有限公司
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Priority to US18/128,240 priority Critical patent/US20230317386A1/en
Publication of TW202341205A publication Critical patent/TW202341205A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/056—Diffuser; Uneven surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/06—Reflector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/062—Light conductor

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  • Push-Button Switches (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Position Input By Displaying (AREA)

Abstract

A backlight keyswitch includes a keyswitch body, a board connected to the keyswitch body, a backlight module and a membrane disposed between the keyswitch body and the board. The backlight module is disposed under the board and includes a backlight circuit board, a light-blocking sheet, a first reflecting ink layer, and a light guide plate disposed between the light-blocking sheet and the backlight circuit board having a backlight source disposed in a containing hole of the light guide plate. The first reflecting ink layer is formed on the board, the membrane, or the light-blocking sheet and located above the backlight source, for at least partially reflecting light emitted by the backlight source back to an optical microstructure in the light guide plate, such that light can pass through the light-blocking sheet, the board and the membrane sequentially via scattering of the optical microstructure to be incident to the keyswitch body.

Description

背光按鍵及其背光模組Backlight buttons and their backlight modules

本發明關於一種背光按鍵及其背光模組，尤指一種使用反射油墨層將背光光源向上發射之光線至少部分反射回導光板內的背光按鍵及其背光模組。The present invention relates to a backlight button and its backlight module, and in particular, to a backlight button and its backlight module that uses a reflective ink layer to reflect at least part of the light emitted upward by a backlight source back into a light guide plate.

一般而言，背光鍵盤之背光模組包含導光板以及背光光源，背光鍵盤之底板設置於導光板上且對應背光鍵盤之複數個背光按鍵的位置分別形成有破孔區，導光板對應每一破孔區之位置形成有光學微結構，以引導光線穿過破孔區入射至背光按鍵上所對應的字符而產生字符發光效果。Generally speaking, the backlight module of a backlight keyboard includes a light guide plate and a backlight light source. The bottom plate of the backlight keyboard is disposed on the light guide plate and has hole areas corresponding to the plurality of backlight keys of the backlight keyboard. The light guide plate corresponds to each hole. An optical microstructure is formed at the position of the hole area to guide light through the hole area and incident on the corresponding characters on the backlight button to produce a character luminous effect.

目前常見背光光源設計係直接在底板下配置具有分別對應每一按鍵之複數個發光二極體的背光電路板，藉此，發光二極體係可射出光線至鍵帽上相對應之字符而產生字符發光效果。然而，由於發光二極體向上發射之光線會直接入射至背光按鍵，因此往往會產生背光按鍵上之中間字符過亮但側邊字符亮度不足的問題，從而影響背光按鍵的發光均勻性與在使用時的視覺美觀效果。At present, a common backlight source design is to configure a backlight circuit board with a plurality of light-emitting diodes corresponding to each key directly under the bottom plate. Through this, the light-emitting diode system can emit light to the corresponding characters on the keycaps to generate characters. Glow effect. However, since the light emitted upward by the light-emitting diodes will be directly incident on the backlight keys, there will often be a problem that the middle characters on the backlight keys are too bright but the side characters are not bright enough, thus affecting the uniformity of the backlight keys and their use. visual aesthetic effect.

因此，本發明的目的在於提供一種使用反射油墨層將背光光源向上發射之光線至少部分反射回導光板內的背光按鍵及其背光模組，以解決上述問題。Therefore, an object of the present invention is to provide a backlight button and its backlight module that use a reflective ink layer to reflect at least part of the light emitted upward by the backlight source back into the light guide plate, so as to solve the above problems.

根據一實施例，本發明之背光按鍵包含一按鍵主體、一底板、一薄膜電路板，以及一背光模組。該底板設置於該按鍵主體下且連接於該按鍵主體以使該按鍵主體可相對於該底板上下移動，該底板對應該按鍵主體之位置具有至少一破孔區。該薄膜電路板設置於該按鍵主體與該底板之間。該背光模組設置於該底板下，該背光模組包含一導光板、一背光電路板、一遮光片，以及一第一反射油墨層。該導光板對應該按鍵主體之位置具有一容置孔且對應該至少一破孔區之位置形成有一光學微結構。該背光電路板設置於該導光板下且具有一背光光源，該背光光源設置於該容置孔中。該遮光片設置於該底板以及該導光板之間且對應該按鍵主體之位置具有一透光區。該第一反射油墨層形成於該底板、該薄膜電路板以及該遮光片之其中之一且位於該背光光源之上方，用來將該背光光源向上發射之光線至少部分反射回該光學微結構且經由該光學微結構之散射依序穿過該透光區、該至少一破孔區與該薄膜電路板而入射至該按鍵主體。According to an embodiment, the backlight key of the present invention includes a key body, a base plate, a thin film circuit board, and a backlight module. The bottom plate is disposed under the key body and connected to the key body so that the key body can move up and down relative to the bottom plate. The bottom plate has at least one hole area corresponding to the position of the key body. The thin film circuit board is disposed between the key body and the base plate. The backlight module is disposed under the base plate. The backlight module includes a light guide plate, a backlight circuit board, a light shielding sheet, and a first reflective ink layer. The light guide plate has a receiving hole corresponding to the key body and an optical microstructure formed corresponding to the at least one hole area. The backlight circuit board is disposed under the light guide plate and has a backlight source. The backlight source is disposed in the accommodating hole. The light-shielding sheet is disposed between the bottom plate and the light guide plate and has a light-transmitting area corresponding to the position of the key body. The first reflective ink layer is formed on one of the base plate, the thin film circuit board and the light-shielding sheet and is located above the backlight source for at least partially reflecting the light emitted upward by the backlight source back to the optical microstructure. The scattering through the optical microstructure sequentially passes through the light-transmitting area, the at least one hole area and the film circuit board and is incident on the key body.

根據另一實施例，本發明之背光模組適用於一背光按鍵，該背光按鍵具有一按鍵主體、一底板，以及一薄膜電路板，該底板設置於該按鍵主體下且連接於該按鍵主體以使該按鍵主體可相對於該底板上下移動，該底板對應該按鍵主體之位置具有至少一破孔區，該薄膜電路板設置於該按鍵主體與該底板之間，該背光模組包含一導光板、一背光電路板、一遮光片，以及一第一反射油墨層。該導光板對應該按鍵主體之位置具有一容置孔且對應該至少一破孔區之位置形成有一光學微結構。該背光電路板設置於該導光板下且具有一背光光源，該背光光源設置於該容置孔中。該遮光片設置於該底板以及該導光板之間且對應該按鍵主體之位置具有一透光區，該第一反射油墨層形成於該底板、該薄膜電路板以及該遮光片之其中之一且位於該背光光源之上方，用來將該背光光源向上發射之光線至少部分反射回該光學微結構且經由該光學微結構之散射依序穿過該透光區、該至少一破孔區與該薄膜電路板而入射至該按鍵主體。According to another embodiment, the backlight module of the present invention is suitable for a backlight button. The backlight button has a button body, a base plate, and a film circuit board. The base plate is disposed under the button body and connected to the button body. The key body can move up and down relative to the base plate. The base plate has at least one hole area corresponding to the position of the key body. The film circuit board is disposed between the key body and the base plate. The backlight module includes a light guide plate. , a backlight circuit board, a light shielding sheet, and a first reflective ink layer. The light guide plate has a receiving hole corresponding to the key body and an optical microstructure formed corresponding to the at least one hole area. The backlight circuit board is disposed under the light guide plate and has a backlight source. The backlight source is disposed in the accommodating hole. The light-shielding sheet is disposed between the base plate and the light guide plate and has a light-transmitting area corresponding to the key body. The first reflective ink layer is formed on one of the base plate, the thin film circuit board and the light-shielding sheet. Located above the backlight source, it is used to at least partially reflect the light emitted upward by the backlight source back to the optical microstructure and pass through the light-transmitting area, the at least one hole area and the optical microstructure sequentially through the scattering of the optical microstructure. The thin film circuit board is incident on the key body.

綜上所述，本發明係採用將反射油墨層設置在背光光源上方以將背光光源向上發射之光線至少部分反射回導光板（可避免中間字符過亮）且接著經由導光板光學微結構之散射而入射至按鍵主體（可提升側邊字符亮度）之導光設計，以解決先前技術中所提到的發光二極體向上發射之光線會直接入射至背光按鍵導致中間字符過亮但側邊字符亮度不足的問題，從而大幅地提升背光按鍵的發光均勻性與在使用時的視覺美觀效果。To sum up, the present invention uses a reflective ink layer disposed above the backlight source to at least partially reflect the light emitted upward by the backlight source back to the light guide plate (to avoid over-brightness of the middle characters) and then scatter it through the optical microstructure of the light guide plate. The light guide design that is incident on the key body (which can increase the brightness of the side characters) solves the problem mentioned in the previous technology that the light emitted upward by the light-emitting diodes will be directly incident on the backlight button, causing the middle characters to be too bright but the side characters to be too bright. The problem of insufficient brightness is eliminated, thereby greatly improving the uniformity of the backlight keys and the visual aesthetics during use.

關於本發明之優點與精神可以藉由以下的發明詳述及所附圖式得到進一步的瞭解。The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings.

以下內容將搭配圖式，藉由特定的具體實施例說明本發明之技術內容，熟悉此技術之人士可由本說明書所揭示之內容輕易地了解本發明之其他優點與功效。本發明亦可藉由其他不同的具體實施例加以施行或應用。本說明書中的各項細節亦可基於不同觀點與應用，在不背離本發明之精神下，進行各種修飾與變更。尤其是，於圖式中各個元件的比例大小及配置關係（如油墨層比例大小等）僅具示範性用途，並非代表本發明實施的實際狀況。The following content will be combined with drawings to illustrate the technical content of the present invention through specific embodiments. Those familiar with this technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various modifications and changes may be made to various details in this description based on different viewpoints and applications without departing from the spirit of the present invention. In particular, the proportional size and arrangement relationship of each component in the drawings (such as the proportional size of the ink layer, etc.) are only for exemplary purposes and do not represent the actual implementation of the present invention.

請參閱第1圖，其為根據本發明之一實施例所提出之背光按鍵10之剖面簡示圖，背光按鍵10係可較佳地應用在一般具有由上蓋與下殼體組成之開合電子設備或具有按鍵輸入功能之電子裝置上（如筆記型電腦或鍵盤裝置，但不以此為限）且提供字符發光功能，以便使用者按壓而執行使用者所欲輸入之功能，如第1圖所示，背光按鍵10包含按鍵主體12、底板14、薄膜電路板16，以及背光模組18。底板14係設置於按鍵主體12下以及連接於按鍵主體12以使按鍵主體12可相對於底板14上下移動，底板14對應按鍵主體12之位置具有至少一破孔區15（於第1圖中顯示二個，但不以此為限），且薄膜電路板16係設置於按鍵主體12與底板14之間，至於針對按鍵主體12之元件的相關描述，其係常見於先前技術中，舉例來說，按鍵主體12可包含鍵帽20、升降機構22以及彈性復位件24（但不受此限），薄膜電路板16具有開關，鍵帽20連接於升降機構22，升降機構22可活動地設置在底板14以用來承托鍵帽20上下移動以接近或遠離開關，彈性復位件24受壓時儲存之彈性恢復力可幫助鍵帽20回復到初始位置以便使用者進行後續按壓操作。Please refer to Figure 1, which is a schematic cross-sectional view of a backlight button 10 according to an embodiment of the present invention. The backlight button 10 can be preferably applied to an electronic switch that generally has an upper cover and a lower shell. Equipment or electronic devices with key input functions (such as laptops or keyboard devices, but not limited to this) and provide a character illumination function so that the user can press and execute the function the user wants to input, as shown in Figure 1 As shown, the backlight key 10 includes a key body 12, a base plate 14, a thin film circuit board 16, and a backlight module 18. The bottom plate 14 is disposed under the key body 12 and connected to the key body 12 so that the key body 12 can move up and down relative to the bottom plate 14. The bottom plate 14 has at least one hole area 15 corresponding to the position of the key body 12 (shown in Figure 1 Two, but not limited to), and the film circuit board 16 is disposed between the key body 12 and the base plate 14. As for the relevant descriptions of the components of the key body 12, they are commonly seen in the prior art. For example , the key body 12 may include a keycap 20, a lifting mechanism 22 and an elastic return member 24 (but is not limited to this), the film circuit board 16 has a switch, the keycap 20 is connected to the lifting mechanism 22, the lifting mechanism 22 is movably disposed on The bottom plate 14 is used to support the keycap 20 to move up and down to approach or move away from the switch. The elastic restoring force stored when the elastic return member 24 is pressed can help the keycap 20 return to the initial position for the user to perform subsequent pressing operations.

以下係針對背光模組18之設計進行詳細之描述，背光模組18係設置於底板14下且包含導光板26、背光電路板28、遮光片30，以及第一反射油墨層32。導光板26對應按鍵主體12之位置具有容置孔34且對應破孔區15之位置形成有光學微結構36，背光電路板28係設置於導光板26下且具有背光光源38，背光光源38（較佳地為發光二極體，但不以此為限）係設置於容置孔34中，遮光片30係設置於底板14以及導光板26之間且對應按鍵主體12之位置具有透光區31，第一反射油墨層32係可較佳地為白色油墨層（但不受此限）且形成於遮光片30且位於背光光源38之上方，更詳細地說，在此實施例中，由第1圖可知，第一反射油墨層32係可形成於遮光片30之下表面S1，且在實際應用中，為了防止光線部分穿透第一反射油墨層32而直接向上入射至按鍵主體12以更進一步地改善中間字符過亮的問題，背光模組18可另包含不透光油墨層40，不透光油墨層40係可較佳地為黑色油墨層（但不受此限）且形成於遮光片30之上表面S2以用來阻止穿透第一反射油墨層32之光線直接入射至按鍵主體12。The following is a detailed description of the design of the backlight module 18 . The backlight module 18 is disposed under the base plate 14 and includes a light guide plate 26 , a backlight circuit board 28 , a light shielding sheet 30 , and a first reflective ink layer 32 . The light guide plate 26 has an accommodating hole 34 corresponding to the key body 12 and an optical microstructure 36 formed at a position corresponding to the hole area 15. The backlight circuit board 28 is disposed under the light guide plate 26 and has a backlight source 38. The backlight source 38 ( Preferably, but not limited to, light-emitting diodes (LEDs) are disposed in the accommodating holes 34. The light-shielding sheet 30 is disposed between the base plate 14 and the light guide plate 26 and has a light-transmitting area corresponding to the position of the key body 12. 31. The first reflective ink layer 32 may preferably be a white ink layer (but not limited thereto) and is formed on the light shielding sheet 30 and located above the backlight source 38. More specifically, in this embodiment, by As shown in Figure 1, the first reflective ink layer 32 can be formed on the lower surface S1 of the light-shielding sheet 30, and in practical applications, in order to prevent light from partially penetrating the first reflective ink layer 32 and directly upwardly incident on the key body 12. To further improve the problem of over-brightness of the middle characters, the backlight module 18 may further include an opaque ink layer 40. The opaque ink layer 40 may preferably be a black ink layer (but not limited to this) and formed on The upper surface S2 of the light-shielding sheet 30 is used to prevent light that penetrates the first reflective ink layer 32 from directly entering the key body 12 .

透過上述配置，第一反射油墨層32係可將背光光源38向上發射之光線至少部分反射回導光板26中且入射至光學微結構36（如第1圖所示），藉此，位於導光板26內的光線即可經由光學微結構36之散射依序穿過遮光片30之透光區31、底板14之破孔區15與薄膜電路板16而入射至按鍵主體12，從而產生字符發光效果。Through the above configuration, the first reflective ink layer 32 can reflect at least part of the light emitted upward by the backlight source 38 back into the light guide plate 26 and incident on the optical microstructure 36 (as shown in FIG. 1 ), thereby being located on the light guide plate. The light in 26 can pass through the light-transmitting area 31 of the light-shielding sheet 30, the perforated area 15 of the bottom plate 14 and the film circuit board 16 in sequence through the scattering of the optical microstructure 36, and then be incident on the key body 12, thereby producing a character luminous effect. .

需注意的是，上述反射油墨層與不透光油墨層之配置亦可應用在背光電路板28上，舉例來說，由第1圖可知，背光模組18可另包含第二反射油墨層42以及不透光油墨層44，第二反射油墨層42（較佳地為白色油墨層，但不受此限）形成於背光電路板28上以用來將從導光板26向下射出之光線反射回導光板26，且不透光油墨層44（較佳地為黑色油墨層，但不受此限）形成於背光電路板28下以用來阻止光線穿透背光電路板28，從而進一步地提升背光光源38入射至導光板26的光線使用效率。It should be noted that the above configuration of the reflective ink layer and the opaque ink layer can also be applied to the backlight circuit board 28. For example, as shown in Figure 1, the backlight module 18 can further include a second reflective ink layer 42. As well as an opaque ink layer 44, a second reflective ink layer 42 (preferably a white ink layer, but not limited thereto) is formed on the backlight circuit board 28 to reflect light emitted downwardly from the light guide plate 26. back to the light guide plate 26, and an opaque ink layer 44 (preferably a black ink layer, but not limited thereto) is formed under the backlight circuit board 28 to prevent light from penetrating the backlight circuit board 28, thereby further improving the The light usage efficiency of the backlight source 38 incident on the light guide plate 26 .

綜上所述，本發明係採用將反射油墨層設置在背光光源上方以將背光光源向上發射之光線至少部分反射回導光板（可避免中間字符過亮）且接著經由導光板光學微結構之散射而入射至按鍵主體（可提升側邊字符亮度）之導光設計，以解決先前技術中所提到的發光二極體向上發射之光線會直接入射至背光按鍵導致中間字符過亮但側邊字符亮度不足的問題，從而大幅地提升背光按鍵的發光均勻性與在使用時的視覺美觀效果。To sum up, the present invention uses a reflective ink layer disposed above the backlight source to at least partially reflect the light emitted upward by the backlight source back to the light guide plate (to avoid over-brightness of the middle characters) and then scatter it through the optical microstructure of the light guide plate. The light guide design that is incident on the key body (which can increase the brightness of the side characters) solves the problem mentioned in the previous technology that the light emitted upward by the light-emitting diodes will be directly incident on the backlight button, causing the middle characters to be too bright but the side characters to be too bright. The problem of insufficient brightness is eliminated, thereby greatly improving the uniformity of the backlight keys and the visual aesthetics during use.

值得一提的是，油墨層之堆疊配置係可不限於上述實施例，意即本發明亦可採用其他油墨層堆疊設計，其油墨層尺寸比例關係以及油墨顏色與種類端視背光模組18之實際出光應用而有所變化。舉例來說，如第2圖（a）所示，第一反射油墨層32係可形成於遮光片30之下表面S1，且不透光油墨層40係可形成於第一反射油墨層32與遮光片30之間；如第2圖（b）所示，第一反射油墨層32係可形成於遮光片30之上表面S1，且不透光油墨層40係可疊設形成於第一反射油墨層32上。It is worth mentioning that the stacking configuration of the ink layers is not limited to the above embodiment, which means that the present invention can also adopt other ink layer stacking designs. The size ratio of the ink layers as well as the color and type of the ink depend on the actual backlight module 18 It varies depending on the lighting application. For example, as shown in FIG. 2(a) , the first reflective ink layer 32 can be formed on the lower surface S1 of the light-shielding sheet 30 , and the opaque ink layer 40 can be formed on the first reflective ink layer 32 and the lower surface S1 of the light-shielding sheet 30 . between the light-shielding sheets 30; as shown in Figure 2(b), the first reflective ink layer 32 can be formed on the upper surface S1 of the light-shielding sheet 30, and the opaque ink layer 40 can be stacked and formed on the first reflective ink layer 32. on the ink layer 32.

除此之外，反射油墨層之形成位置亦可不限於上述實施例，舉例來說，請參閱第3圖，其為根據本發明另一實施例所提出之背光按鍵100之剖面簡示圖，在此實施例與上述實施例中所提到之元件具有相同編號者，其代表具有相同或相似之結構與功能，於此不再贅述。如第3圖所示，背光按鍵100包含按鍵主體12、底板14、薄膜電路板16，以及背光模組102，背光模組102係設置於底板14下且包含導光板26、背光電路板28、遮光片30、第二反射油墨層42、不透光油墨層44，以及第一反射油墨層104。在此實施例中，第一反射油墨層104係可較佳地為白色油墨層（但不受此限）且形成於底板14之下表面S3，藉此，由第3圖可知，第一反射油墨層104係可將背光光源38向上發射之光線至少部分反射回導光板26中且入射至光學微結構36，如此一來，位於導光板26內的光線即可經由光學微結構36之散射依序穿過遮光片30之透光區31、底板14之破孔區15與薄膜電路板16而入射至按鍵主體12，從而產生字符發光效果。In addition, the formation position of the reflective ink layer is not limited to the above embodiment. For example, please refer to Figure 3, which is a schematic cross-sectional view of the backlight button 100 according to another embodiment of the present invention. Components mentioned in this embodiment and the above-mentioned embodiments with the same numbers represent that they have the same or similar structures and functions, and will not be described again here. As shown in Figure 3, the backlight button 100 includes a button body 12, a base plate 14, a film circuit board 16, and a backlight module 102. The backlight module 102 is disposed under the base plate 14 and includes a light guide plate 26, a backlight circuit board 28, The light-shielding sheet 30 , the second reflective ink layer 42 , the opaque ink layer 44 , and the first reflective ink layer 104 . In this embodiment, the first reflective ink layer 104 may preferably be a white ink layer (but not limited thereto) and is formed on the lower surface S3 of the bottom plate 14. Therefore, as can be seen from Figure 3, the first reflective ink layer The ink layer 104 can reflect at least part of the light emitted upward by the backlight source 38 back into the light guide plate 26 and incident on the optical microstructure 36. In this way, the light in the light guide plate 26 can be scattered by the optical microstructure 36. It sequentially passes through the light-transmitting area 31 of the light-shielding sheet 30, the hole area 15 of the base plate 14 and the thin film circuit board 16 and is incident on the key body 12, thereby producing a character luminous effect.

另外，請參閱第4圖，其為根據本發明另一實施例所提出之背光按鍵150之剖面簡示圖，在此實施例與上述實施例中所提到之元件具有相同編號者，其代表具有相同或相似之結構與功能，於此不再贅述。如第4圖所示，背光按鍵150包含按鍵主體12、底板14、薄膜電路板16，以及背光模組152，底板14可另具有中間孔區154，背光模組152係設置於底板14下且包含導光板26、背光電路板28、遮光片30、第二反射油墨層42、不透光油墨層44，以及第一反射油墨層156。在此實施例中，第一反射油墨層156係可較佳地為白色油墨層（但不受此限）且形成於薄膜電路板16之下表面S4，藉此，由第4圖可知，第一反射油墨層156係可將背光光源38向上發射且通過中間孔區154之光線至少部分反射回導光板26中且入射至光學微結構36，如此一來，位於導光板26內的光線即可經由光學微結構36之散射依序穿過遮光片30之透光區31、底板14之破孔區15與薄膜電路板16而入射至按鍵主體12，從而產生字符發光效果。In addition, please refer to Figure 4, which is a schematic cross-sectional view of a backlight button 150 according to another embodiment of the present invention. In this embodiment, the components mentioned in the above embodiment have the same numbers. They have the same or similar structures and functions and will not be described again here. As shown in Figure 4, the backlight button 150 includes a button body 12, a base plate 14, a film circuit board 16, and a backlight module 152. The base plate 14 can also have a middle hole area 154. The backlight module 152 is disposed under the base plate 14 and It includes a light guide plate 26 , a backlight circuit board 28 , a light shielding sheet 30 , a second reflective ink layer 42 , an opaque ink layer 44 , and a first reflective ink layer 156 . In this embodiment, the first reflective ink layer 156 may preferably be a white ink layer (but not limited thereto) and is formed on the lower surface S4 of the thin film circuit board 16. Therefore, as can be seen from Figure 4, A reflective ink layer 156 can reflect at least part of the light emitted upward by the backlight source 38 and passing through the middle hole area 154 back into the light guide plate 26 and incident on the optical microstructure 36. In this way, the light located in the light guide plate 26 can be The scattering through the optical microstructure 36 sequentially passes through the light-transmitting area 31 of the light-shielding sheet 30, the perforated area 15 of the base plate 14, and the film circuit board 16, and is incident on the key body 12, thereby producing a character luminous effect.

在實際應用中，為了避免鍵帽對應反射油墨層之位置出現亮度不足的問題，本發明亦可選擇性地採用補光孔設計，舉例來說，請參閱第5圖，其為根據本發明另一實施例所提出之背光按鍵200之剖面簡示圖，在此實施例與上述實施例中所提到之元件具有相同編號者，其代表具有相同或相似之結構與功能，於此不再贅述。如第5圖所示，背光按鍵200包含按鍵主體12、底板14、薄膜電路板16，以及背光模組202，底板14可另具有中間孔區204，背光模組202係設置於底板14下且包含導光板26、背光電路板28、遮光片30、不透光油墨層40、第二反射油墨層42、不透光油墨層44，以及第一反射油墨層206。在此實施例中，第一反射油墨層206係可較佳地為白色油墨層（但不受此限），第一反射油墨層206係可形成於遮光片30之上表面S2且具有至少一補光孔207，於第5圖中顯示二個補光孔207以分別位於不透光油墨層40之兩側（但不以此為限），藉此，除了可將背光光源38向上發射之光線至少部分反射回導光板26中之外，第一反射油墨層206亦可允許背光光源38向上發射之光線通過補光孔207、中間孔區204與薄膜電路板16而入射至按鍵主體12以產生亮度補償效果，從而進一步地提昇背光按鍵200的發光均勻性。In practical applications, in order to avoid the problem of insufficient brightness at the position of the keycap corresponding to the reflective ink layer, the present invention can also selectively adopt a light filling hole design. For example, please refer to Figure 5, which is another method according to the present invention. A schematic cross-sectional view of the backlight button 200 proposed in one embodiment. The components mentioned in this embodiment and the above embodiment have the same numbers, which represent the same or similar structures and functions, and will not be described again here. . As shown in Figure 5, the backlight button 200 includes a button body 12, a base plate 14, a film circuit board 16, and a backlight module 202. The base plate 14 can also have a middle hole area 204. The backlight module 202 is disposed under the base plate 14 and It includes a light guide plate 26 , a backlight circuit board 28 , a light shielding sheet 30 , an opaque ink layer 40 , a second reflective ink layer 42 , an opaque ink layer 44 , and a first reflective ink layer 206 . In this embodiment, the first reflective ink layer 206 may preferably be a white ink layer (but is not limited thereto). The first reflective ink layer 206 may be formed on the upper surface S2 of the light-shielding sheet 30 and have at least one The light filling holes 207 are shown in Figure 5 as two light filling holes 207 respectively located on both sides of the opaque ink layer 40 (but not limited to this), whereby the backlight source 38 can be emitted upward. In addition to at least partially reflecting the light back into the light guide plate 26 , the first reflective ink layer 206 can also allow the light emitted upward by the backlight source 38 to pass through the light fill hole 207 , the middle hole area 204 and the film circuit board 16 to be incident on the key body 12 . A brightness compensation effect is produced, thereby further improving the lighting uniformity of the backlight button 200 .

此外，請參閱第5圖以及第6圖，第6圖為第5圖之鍵帽20、底板14、第一反射油墨層206與不透光油墨層40之配置關係的上視透視圖，由第5圖以及第6圖可知，第一反射油墨層206係可更形成於遮光片30對應底板14除破孔區15以外之區域的位置上，藉以進一步地提升背光光源38入射至導光板26的光線使用效率，其中如第6圖所示之第一反射油墨層206的塗佈配置僅為舉例之用，本發明並不以此為限。 以上所述僅為本發明之較佳實施例，凡依本發明申請專利範圍所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。 In addition, please refer to Figures 5 and 6. Figure 6 is a top perspective view of the arrangement relationship of the keycap 20, the bottom plate 14, the first reflective ink layer 206 and the opaque ink layer 40 in Figure 5. As can be seen from Figures 5 and 6, the first reflective ink layer 206 can be further formed on the light-shielding sheet 30 corresponding to the area of the base plate 14 except the hole area 15, thereby further improving the incidence of the backlight source 38 to the light guide plate 26 The light usage efficiency, the coating configuration of the first reflective ink layer 206 as shown in Figure 6 is only for example, and the invention is not limited thereto. The above are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the patentable scope of the present invention shall fall within the scope of the present invention.

10、100、150、200:背光按鍵 12:按鍵主體 14:底板 15:破孔區 16:薄膜電路板 18、102、152、202:背光模組 20:鍵帽 22:升降機構 24:彈性復位件 26:導光板 28:背光電路板 30:遮光片 31:透光區 32、104、156、206:第一反射油墨層 34:容置孔 36:光學微結構 38:背光光源 40、44:不透光油墨層 42:第二反射油墨層 154、204:中間孔區 207:補光孔 S1、S3、S4:下表面 S2:上表面 10, 100, 150, 200: Backlit buttons 12:Button body 14: Bottom plate 15: hole area 16:Thin film circuit board 18, 102, 152, 202: Backlight module 20:Keycap 22:Lifting mechanism 24: Elastic reset piece 26:Light guide plate 28:Backlight circuit board 30:Shading film 31: Translucent area 32, 104, 156, 206: first reflective ink layer 34: Accommodation hole 36: Optical microstructure 38: Backlight source 40, 44: Opaque ink layer 42: Second reflective ink layer 154, 204: Middle hole area 207:Filling hole S1, S3, S4: lower surface S2: Upper surface

第1圖為根據本發明之一實施例所提出之背光按鍵之剖面簡示圖。 第2圖為根據本發明不同實施例所提出之不同油墨層配置圖。 第3圖為根據本發明另一實施例所提出之背光按鍵之剖面簡示圖。 第4圖為根據本發明另一實施例所提出之背光按鍵之剖面簡示圖。 第5圖為根據本發明另一實施例所提出之背光按鍵之剖面簡示圖。 第6圖為第5圖之鍵帽、底板、第一反射油墨層與不透光油墨層之配置關係的上視透視圖。 Figure 1 is a schematic cross-sectional view of a backlight key according to an embodiment of the present invention. Figure 2 is a diagram showing different ink layer configurations according to different embodiments of the present invention. Figure 3 is a schematic cross-sectional view of a backlight key according to another embodiment of the present invention. Figure 4 is a schematic cross-sectional view of a backlight key according to another embodiment of the present invention. Figure 5 is a schematic cross-sectional view of a backlight key according to another embodiment of the present invention. Figure 6 is a top perspective view of the arrangement relationship between the keycap, the bottom plate, the first reflective ink layer and the opaque ink layer in Figure 5.

10:背光按鍵 10: Backlit buttons

12:按鍵主體 12:Button body

14:底板 14: Bottom plate

15:破孔區 15: hole area

16:薄膜電路板 16:Thin film circuit board

18:背光模組 18:Backlight module

20:鍵帽 20:Keycap

22:升降機構 22:Lifting mechanism

24:彈性復位件 24: Elastic reset piece

26:導光板 26:Light guide plate

28:背光電路板 28:Backlight circuit board

30:遮光片 30:Shading film

31:透光區 31: Translucent area

32:第一反射油墨層 32: First reflective ink layer

34:容置孔 34: Accommodation hole

36:光學微結構 36: Optical microstructure

38:背光光源 38:Backlight source

40、44:不透光油墨層 40, 44: Opaque ink layer

42:第二反射油墨層 42: Second reflective ink layer

S1:下表面 S1: lower surface

S2:上表面 S2: Upper surface

Claims (24)

一種背光按鍵，其包含： 一按鍵主體； 一底板，其設置於該按鍵主體下且連接於該按鍵主體以使該按鍵主體可相對於該底板上下移動，該底板對應該按鍵主體之位置具有至少一破孔區； 一薄膜電路板，其設置於該按鍵主體與該底板之間；以及 一背光模組，其設置於該底板下，該背光模組包含： 一導光板，其對應該按鍵主體之位置具有一容置孔且對應該至少一破孔區之位置形成有一光學微結構； 一背光電路板，其設置於該導光板下且具有一背光光源，該背光光源設置於該容置孔中； 一遮光片，其設置於該底板以及該導光板之間且對應該按鍵主體之位置具有一透光區；以及 一第一反射油墨層，其形成於該底板、該薄膜電路板以及該遮光片之其中之一且位於該背光光源之上方，用來將該背光光源向上發射之光線至少部分反射回該光學微結構且經由該光學微結構之散射依序穿過該透光區、該至少一破孔區與該薄膜電路板而入射至該按鍵主體。 A backlit button containing: One button body; A bottom plate, which is disposed under the key body and connected to the key body so that the key body can move up and down relative to the bottom plate. The bottom plate has at least one hole area corresponding to the position of the key body; A thin film circuit board is disposed between the key body and the base plate; and A backlight module is provided under the bottom panel. The backlight module includes: A light guide plate, which has a receiving hole corresponding to the position of the key body and an optical microstructure formed corresponding to the position of the at least one hole area; A backlight circuit board is arranged under the light guide plate and has a backlight source, and the backlight source is arranged in the accommodating hole; A light-shielding sheet is disposed between the base plate and the light guide plate and has a light-transmitting area corresponding to the position of the key body; and A first reflective ink layer is formed on one of the base plate, the thin film circuit board and the light-shielding sheet and is located above the backlight source for at least partially reflecting the light emitted upward by the backlight source back to the optical micro structure and is incident on the key body through the light-transmitting area, the at least one hole area and the thin film circuit board through the scattering of the optical microstructure. 如請求項1所述之背光按鍵，其中該第一反射油墨層形成於該遮光片之一上表面或該遮光片之一下表面。The backlight key of claim 1, wherein the first reflective ink layer is formed on an upper surface of the light shielding sheet or a lower surface of the light shielding sheet. 如請求項2所述之背光按鍵，其中該背光模組另包含一不透光油墨層；該第一反射油墨層形成於該遮光片之該上表面且該不透光油墨層疊設形成於該第一反射油墨層上，或者是，該不透光油墨層與該第一反射油墨層分別形成於該遮光片之該上表面以及該下表面，以用來阻止穿透該第一反射油墨層之光線入射至該按鍵主體。The backlight button of claim 2, wherein the backlight module further includes an opaque ink layer; the first reflective ink layer is formed on the upper surface of the light shielding sheet, and the opaque ink layer is stacked on the On the first reflective ink layer, or the opaque ink layer and the first reflective ink layer are respectively formed on the upper surface and the lower surface of the light shielding sheet to prevent penetration of the first reflective ink layer. The light is incident on the key body. 如請求項3所述之背光按鍵，其中該第一反射油墨層為白色油墨層，該不透光油墨層為黑色油墨層。The backlight key of claim 3, wherein the first reflective ink layer is a white ink layer, and the opaque ink layer is a black ink layer. 如請求項3所述之背光按鍵，其中該第一反射油墨層具有至少一補光孔，該底板另具有一中間孔區，該至少一補光孔位於該不透光油墨層之至少一側，使得該背光光源向上發射之光線可通過該至少一補光孔、該中間孔區以及該薄膜電路板而入射至該按鍵主體。The backlight key of claim 3, wherein the first reflective ink layer has at least one light-filling hole, the base plate also has a middle hole area, and the at least one light-filling hole is located on at least one side of the opaque ink layer. , so that the light emitted upward by the backlight source can be incident on the key body through the at least one light filling hole, the middle hole area and the thin film circuit board. 如請求項1或5所述之背光按鍵，其中該第一反射油墨層形成於該遮光片對應該底板除該至少一破孔區以外之區域的位置上。The backlight key according to claim 1 or 5, wherein the first reflective ink layer is formed at a position of the light-shielding sheet corresponding to an area of the base plate other than the at least one hole area. 如請求項1所述之背光按鍵，其中該第一反射油墨層形成於該底板之一下表面。The backlight key of claim 1, wherein the first reflective ink layer is formed on a lower surface of the base plate. 如請求項1所述之背光按鍵，其中該第一反射油墨層形成於該薄膜電路板之一下表面。The backlight key of claim 1, wherein the first reflective ink layer is formed on a lower surface of the thin film circuit board. 如請求項1所述之背光按鍵，其中該第一反射油墨層為白色油墨層。The backlight key of claim 1, wherein the first reflective ink layer is a white ink layer. 如請求項1所述之背光按鍵，其中該背光模組另包含： 一第二反射油墨層，其形成於該背光電路板上，用來將從該導光板向下射出之光線反射回該導光板。 The backlight button as described in claim 1, wherein the backlight module further includes: A second reflective ink layer is formed on the backlight circuit board and used to reflect light emitted downwardly from the light guide plate back to the light guide plate. 如請求項10所述之背光按鍵，其中該第一反射油墨層以及該第二反射油墨層為白色油墨層。The backlight key of claim 10, wherein the first reflective ink layer and the second reflective ink layer are white ink layers. 如請求項1或10所述之背光按鍵，其中該背光模組另包含一不透光油墨層；該不透光油墨層形成於該背光電路板下，以用來阻止光線穿透該背光電路板。The backlight button of claim 1 or 10, wherein the backlight module further includes an opaque ink layer; the opaque ink layer is formed under the backlight circuit board to prevent light from penetrating the backlight circuit. plate. 一種背光模組，其適用於一背光按鍵，該背光按鍵具有一按鍵主體、一底板，以及一薄膜電路板，該底板設置於該按鍵主體下且連接於該按鍵主體以使該按鍵主體可相對於該底板上下移動，該底板對應該按鍵主體之位置具有至少一破孔區，該薄膜電路板設置於該按鍵主體與該底板之間，該背光模組包含： 一導光板，其對應該按鍵主體之位置具有一容置孔且對應該至少一破孔區之位置形成有一光學微結構； 一背光電路板，其設置於該導光板下且具有一背光光源，該背光光源設置於該容置孔中； 一遮光片，其設置於該底板以及該導光板之間且對應該按鍵主體之位置具有一透光區；以及 一第一反射油墨層，其形成於該底板、該薄膜電路板以及該遮光片之其中之一且位於該背光光源之上方，用來將該背光光源向上發射之光線至少部分反射回該光學微結構且經由該光學微結構之散射依序穿過該透光區、該至少一破孔區與該薄膜電路板而入射至該按鍵主體。 A backlight module suitable for a backlight button. The backlight button has a button body, a base plate, and a film circuit board. The base plate is disposed under the button body and connected to the button body so that the button body can face each other. Moving up and down on the bottom plate, the bottom plate has at least one hole area corresponding to the position of the key body. The film circuit board is disposed between the key body and the bottom plate. The backlight module includes: A light guide plate, which has a receiving hole corresponding to the position of the key body and an optical microstructure formed corresponding to the position of the at least one hole area; A backlight circuit board is arranged under the light guide plate and has a backlight source, and the backlight source is arranged in the accommodating hole; A light-shielding sheet is disposed between the base plate and the light guide plate and has a light-transmitting area corresponding to the position of the key body; and A first reflective ink layer is formed on one of the base plate, the thin film circuit board and the light-shielding sheet and is located above the backlight source for at least partially reflecting the light emitted upward by the backlight source back to the optical micro structure and is incident on the key body through the light-transmitting area, the at least one hole area and the thin film circuit board through the scattering of the optical microstructure. 如請求項13所述之背光模組，其中該第一反射油墨層形成於該遮光片之一上表面或該遮光片之一下表面。The backlight module of claim 13, wherein the first reflective ink layer is formed on an upper surface of the light shielding sheet or a lower surface of the light shielding sheet. 如請求項14所述之背光模組，其中該背光模組另包含一不透光油墨層；該第一反射油墨層形成於該遮光片之該上表面且該不透光油墨層疊設形成於該第一反射油墨層上，或者是，該不透光油墨層與該第一反射油墨層分別形成於該遮光片之該上表面以及該下表面，以用來阻止穿透該第一反射油墨層之光線入射至該按鍵主體。The backlight module of claim 14, wherein the backlight module further includes an opaque ink layer; the first reflective ink layer is formed on the upper surface of the light shielding sheet, and the opaque ink layer is stacked on The first reflective ink layer, or the opaque ink layer and the first reflective ink layer are respectively formed on the upper surface and the lower surface of the light shielding sheet to prevent penetration of the first reflective ink. The layer of light is incident on the key body. 如請求項15所述之背光模組，其中該第一反射油墨層為白色油墨層，該不透光油墨層為黑色油墨層。The backlight module of claim 15, wherein the first reflective ink layer is a white ink layer, and the opaque ink layer is a black ink layer. 如請求項15所述之背光模組，其中該第一反射油墨層具有至少一補光孔，該底板另具有一中間孔區，該至少一補光孔位於該不透光油墨層之至少一側，使得該背光光源向上發射之光線可通過該至少一補光孔以及該中間孔區而入射至該按鍵主體。The backlight module of claim 15, wherein the first reflective ink layer has at least one light-filling hole, the base plate also has a middle hole area, and the at least one light-filling hole is located in at least one of the opaque ink layers. side, so that the light emitted upward by the backlight source can be incident on the key body through the at least one light-filling hole and the middle hole area. 如請求項13或17所述之背光模組，其中該第一反射油墨層形成於該遮光片對應該底板除該至少一破孔區以外之區域的位置上。The backlight module as claimed in claim 13 or 17, wherein the first reflective ink layer is formed at a position of the light-shielding sheet corresponding to an area of the base plate other than the at least one hole area. 如請求項13所述之背光模組，其中該第一反射油墨層形成於該底板之一下表面。The backlight module of claim 13, wherein the first reflective ink layer is formed on a lower surface of the base plate. 如請求項13所述之背光模組，其中該第一反射油墨層形成於該薄膜電路板之一下表面。The backlight module of claim 13, wherein the first reflective ink layer is formed on a lower surface of the thin film circuit board. 如請求項13所述之背光模組，其中該第一反射油墨層為白色油墨層。The backlight module of claim 13, wherein the first reflective ink layer is a white ink layer. 如請求項13所述之背光模組，其中該背光模組另包含： 一第二反射油墨層，其形成於該背光電路板上，用來將從該導光板向下射出之光線反射回該導光板。 The backlight module as described in claim 13, wherein the backlight module further includes: A second reflective ink layer is formed on the backlight circuit board and used to reflect light emitted downwardly from the light guide plate back to the light guide plate. 如請求項22所述之背光模組，其中該第一反射油墨層以及該第二反射油墨層為白色油墨層。The backlight module of claim 22, wherein the first reflective ink layer and the second reflective ink layer are white ink layers. 如請求項13或22所述之背光模組，其中該背光模組另包含一不透光油墨層；該不透光油墨層形成於該背光電路板下，以用來阻止光線穿透該背光電路板。The backlight module of claim 13 or 22, wherein the backlight module further includes an opaque ink layer; the opaque ink layer is formed under the backlight circuit board to prevent light from penetrating the backlight. circuit board.
TW112109798A 2022-03-31 2023-03-16 Backlight keyswitch and backlight module thereof TW202341205A (en)

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