TW201830068A - A back light module and light guide plate thereof - Google Patents
A back light module and light guide plate thereof Download PDFInfo
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Description
本發明係與背光模組領域相關，尤其是一種背光模組及其導光板。 The invention relates to the field of backlight modules, in particular to a backlight module and its light guide plate.
隨電腦鍵盤技術之發展，除必備的產品功能外，為提升消費者的購買慾望、產品美觀度與便利性，具發光效能之鍵盤應運而生。習知發光鍵盤係透過裝設於按鍵面板底側之導光板及光源而達到發光功效，光源光線由導光板入光面進入導光板內，受導引後即可於導光板之出光面形成出光，而提供光線予按鍵面板。 With the development of computer keyboard technology, in addition to the necessary product functions, in order to enhance consumers' desire to buy, product aesthetics and convenience, keyboards with luminous efficacy came into being. The conventional light-emitting keyboard achieves the light-emitting effect through the light guide plate and the light source installed on the bottom side of the key panel. The light from the light source enters the light guide plate from the light entrance surface of the light guide plate, and can be formed on the light exit surface of the light guide plate after being guided , And provide light to the key panel.
鑒於安裝與散熱等需求，導光板上除了依據出光需求佈設取光微結構外，亦會設置如貫孔等供以組裝之結構，惟該些結構係會大幅影響導光板的出光均勻度，導致導光板角落處具有陰暗的光場，亦降低發光鍵盤的亮度均勻性。 In view of the installation and heat dissipation requirements, in addition to arranging the light extraction microstructures according to the light output requirements, the light guide plate will also be provided with structures such as through holes for assembly, but these structures will greatly affect the light guide plate light uniformity, resulting in The corner of the light guide plate has a dark light field, which also reduces the brightness uniformity of the light-emitting keyboard.
為解決前述缺失，本發明人係提出如美國專利第US8534853B2號文獻所述之技術內容，其係藉由使光源最強光線偏離貫孔的方式，來避免光線於傳遞途中提早消耗其能量，造成輝度下降之情況。惟實際應用上，該種導光板仍會產生嚴重的輝度不均情況，無法有效改善導光板角落的暗區。 In order to solve the aforementioned deficiencies, the present inventors proposed the technical content as described in US Patent No. US8534853B2, which prevents the light from consuming its energy early in the transmission process and causing brightness by causing the strongest light of the light source to deviate from the through hole The situation of decline. However, in practical applications, this kind of light guide plate will still produce serious unevenness in brightness, which cannot effectively improve the dark area in the corner of the light guide plate.
故本發明人續構思並提出一種背光模組及其導光板，希冀可 有效解決導光板出光輝度不均的現象，提供效能更為優異的導光元件。 Therefore, the inventor continued to conceive and propose a backlight module and its light guide plate, hoping to effectively solve the phenomenon of uneven brightness of the light guide plate and provide a light guide element with more excellent performance.
本發明之一目的，旨在提供一種背光模組及其導光板，係可有效地補足導光板上亮度較暗的區域，以大幅提升導光板整體出光均勻度以獲得更佳之光學品味，並使其搭配應用之電子裝置可具有優越效能。 An object of the present invention is to provide a backlight module and its light guide plate, which can effectively fill in the darker areas of the light guide plate, so as to greatly improve the overall light uniformity of the light guide plate to obtain a better optical taste, and make The matched electronic device can have superior performance.
為達上述目的，本發明之於一實施方式中，係揭示一種背光模組，具有一導光板及至少一第一發光元件，該導光板具有一出光面，且該出光面具有至少一第一開槽及複數微結構區，該等微結構區係間隔設置於該出光面供以形成出光，該第一開槽位於該出光面之一中央區域內，該第一發光元件係容置於該第一開槽中以提供光線予該導光板，其特徵在於：該出光面更具有至少一第一導光區及至少一第一補光區，該第一導光區為直線態樣，並由該第一發光元件沿其出光方向延伸至該第一補光區且穿越至少一該微結構區；其中該微結構區與該第一導光區重疊區域內之取光能力，係小於該微結構區未與該第一導光區重疊區域內之取光能力，藉此使該第一發光元件之部分光線沿該第一導光區行進而被導引至該第一補光區，尤在應用於發光鍵盤時更可有效補足受限於導光板既有結構下而產生之暗區，以提升整體的出光均勻度。 To achieve the above object, in one embodiment of the present invention, a backlight module is disclosed, which has a light guide plate and at least one first light emitting element, the light guide plate has a light exit surface, and the light exit surface has at least a first A slot and a plurality of microstructure regions, the microstructure regions are arranged at intervals on the light exit surface for forming light output, the first slot is located in a central area of the light exit surface, and the first light emitting element is accommodated in the The first slot is used to provide light to the light guide plate, characterized in that the light exit surface further has at least a first light guide area and at least a first light supplement area, the first light guide area is linear, and The first light-emitting element extends to the first light-filling area along its light-emitting direction and passes through at least one of the microstructure areas; wherein the light extraction capability in the overlapping area of the microstructure area and the first light guide area is less than the The light extraction capability in the area where the microstructure area does not overlap with the first light guide area, so that part of the light of the first light emitting element travels along the first light guide area and is then guided to the first fill light area, Especially when it is applied to a light-emitting keyboard, it can effectively fill up the dark areas limited by the existing structure of the light guide plate, so as to improve the overall light uniformity.
於另一實施方式中，則揭露一種導光板，供以配合至少一第一發光元件使用，該導光板具有一出光面，且該出光面更具有至少一第一開槽及複數微結構區，該等微結構區間隔設置於該出光面以供形成出光，該第一開槽係位於該出光面之一中央區域，供以容置該第一發光元件，其特徵在於：該出光面更具有至少一第一導光區及至少一第一補光區，該第 一導光區為直線態樣，並由該第一發光元件沿其出光方向延伸至該第一補光區且穿越至少一該微結構區；其中該微結構區與該第一導光區重疊區域內之取光能力，係小於該微結構區未與該第一導光區重疊區域內之取光能力，藉此使該第一發光元件之部分光線沿該第一導光區行進而被導引至該第一補光區，而可提升整體出光均勻度。 In another embodiment, a light guide plate is disclosed for use with at least one first light emitting element, the light guide plate has a light exit surface, and the light exit surface further has at least a first slot and a plurality of microstructure areas, The microstructure regions are spaced apart on the light-emitting surface for forming light-emitting, the first slot is located in a central area of the light-emitting surface for accommodating the first light-emitting element, characterized in that the light-emitting surface further has At least one first light guide area and at least one first light fill area, the first light guide area is linear, and extends from the first light emitting element to the first light fill area along its light emitting direction and passes through at least one The microstructure area; wherein the light extraction capability in the area where the microstructure area overlaps the first light guide area is less than the light extraction capability in the area where the microstructure area does not overlap the first light guide area, thereby enabling Part of the light of the first light emitting element travels along the first light guide area and then is guided to the first light supplement area, which can improve the overall light uniformity.
承前述二實施方式，於再一實施方式中係揭示該第一導光區係由該第一發光元件朝該第一補光區呈漸寬設置，以因應所需補光要求取得更佳之均光效能。 According to the foregoing two embodiments, in yet another embodiment, it is disclosed that the first light guide region is gradually widened from the first light emitting element toward the first fill light region, so as to obtain a better average according to the required fill light requirements Light efficiency.
於次一實施方式中，較佳者，該第一導光區之寬度介於1~2mm，以避免第一導光區過寬影響所穿射之微結構區出光效能，甚或造成第一補光區過亮情況，及避免第一導光區過窄而無法導引足夠之光線至第一補光區。 In the next embodiment, preferably, the width of the first light guide region is between 1 and 2 mm, so as to avoid that the first light guide region is too wide to affect the light output efficiency of the microstructure region penetrated, or even cause the first supplement The light area is too bright, and the first light guide area is too narrow to guide enough light to the first fill area.
又一實施方式中，係揭示背光模組或導光板更包括一第二導光區，該第二導光區為直線態樣，並由該第一發光元件沿其出光方向延伸至一第二補光區且穿越至少一該微結構區；其中該微結構區與該第二導光區重疊區域內之取光能力，係小於該微結構區未與該第二導光區重疊區域內之取光能力，藉此使第一發光元件可同時補償第一補光區與第二補光區，以提升第一發光元件之使用效能與導光板整體出光均勻度。 In yet another embodiment, it is disclosed that the backlight module or the light guide plate further includes a second light guide area, the second light guide area is linear, and extends from the first light emitting element to a second The light supplementing area passes through at least one of the microstructure areas; wherein the light extraction capability in the overlapping area of the microstructure area and the second light guide area is less than the area of the microstructure area not overlapping the second light guide area The light extraction capability enables the first light-emitting element to compensate the first light-filling area and the second light-filling area at the same time, so as to improve the use efficiency of the first light-emitting element and the overall light-emitting uniformity of the light guide plate.
或於另一實施方式中，背光模組或導光板更包括一第二發光元件、一第二開槽及一第二導光區，該第二開槽位於該中央區域內，供以容置該第二發光元件，該第二導光區為直線態樣，並由該第二發光元件沿其出光方向延伸至該第一補光區且穿越至少一該微結構區；其中該微結構 區與該第二導光區重疊區域內之取光能力，係小於該微結構區未與該第二導光區重疊區域內之取光能力。藉此，透過第二發光元件配合第一發光元件，即可藉由第一導光區與第二導光區同時補償第一補光區之出光輝度，以均勻化整體出光效果。 Or in another embodiment, the backlight module or the light guide plate further includes a second light emitting element, a second slot, and a second light guide area, the second slot is located in the central area for accommodation The second light-emitting element, the second light-guiding area is linear, and extends from the second light-emitting element to the first light-filling area along its light-emitting direction and passes through at least one of the microstructure areas; wherein the microstructure area The light extraction capability in the area overlapping the second light guide area is smaller than the light extraction capability in the area not overlapping the second light guide area. In this way, by combining the second light-emitting element with the first light-emitting element, the first light-guiding area and the second light-guiding area can compensate for the brightness of the first fill-in area at the same time, so as to homogenize the overall light-emitting effect.
視導光板之點亮需求，於一實施方式中則揭示該第一發光元件係朝該出光面之一短邊發光，以提供導光板所需之光線。 Depending on the lighting requirements of the light guide plate, in one embodiment, it is disclosed that the first light emitting element emits light toward a short side of the light emitting surface to provide the light required by the light guide plate.
或如另一實施方式所揭示，該出光面具有相對設置之二短邊，且該第一發光元件為複數設置，至少一該第一發光元件係朝向其中之一該短邊發光，至少一該第一發光元件朝向另一該短邊發光，以使導光板整體各區域皆具有可供以利用之足夠光線能量。 Or as disclosed in another embodiment, the light-emitting surface has two short sides disposed oppositely, and the first light-emitting elements are provided in plural, at least one of the first light-emitting elements emits light toward one of the short sides, and at least one of the The first light-emitting element emits light toward the other short side, so that each area of the light guide plate has sufficient light energy available for use.
承前述實施方式，於一實施方式中，係使至少一該第一發光元件係朝該出光面之一長邊發光，且該長邊與該等短邊係相互垂直，以補償前述各第一發光元件之間的發光輝度。 According to the foregoing embodiment, in one embodiment, at least one of the first light-emitting elements emits light toward a long side of the light-emitting surface, and the long side and the short sides are perpendicular to each other to compensate for each of the first Luminous brightness between light-emitting elements.
綜上所述，本發明所揭示之背光模組與其導光板，利用光路設計之概念於導光板設置第一導光區，使發光元件的部分光線可依循第一導光區路徑被導向出光面上屬於較暗區域之補光區，並讓光線不會在微結構區或受貫孔影響耗損過多能量，進而提高整體出光均勻度與光學品味，使應用該背光模組及其導光板之電子裝置可具有優越的出光效能。 In summary, the backlight module and the light guide plate disclosed in the present invention use the concept of optical path design to provide a first light guide area on the light guide plate, so that part of the light of the light emitting element can be guided to the light exit surface according to the path of the first light guide area It belongs to the light supplement area of the darker area, so that the light will not consume too much energy in the microstructure area or affected by the through hole, thereby improving the overall light uniformity and optical taste, so that the application of the backlight module and its light guide plate electronics The device can have superior light output efficiency.
1‧‧‧背光模組 1‧‧‧Backlight module
2‧‧‧導光板 2‧‧‧Light guide plate
20‧‧‧出光面 20‧‧‧Glossy
20a‧‧‧短邊 20a‧‧‧short side
20b‧‧‧長邊 20b‧‧‧Long side
201‧‧‧第一開槽 201‧‧‧The first slot
2011‧‧‧入光面 2011‧‧‧entrance
202‧‧‧微結構區 202‧‧‧Microstructure area
203‧‧‧中央區域 203‧‧‧Central area
204‧‧‧第一導光區 204‧‧‧First light guide area
205‧‧‧第一補光區 205‧‧‧ First fill light area
206‧‧‧第二導光區 206‧‧‧Second light guide area
207‧‧‧第二補光區 207‧‧‧Second fill light area
208‧‧‧第二開槽 208‧‧‧The second slot
21‧‧‧貫孔 21‧‧‧Through hole
3‧‧‧第一發光元件 3‧‧‧First light-emitting element
4‧‧‧第二發光元件 4‧‧‧Second light-emitting element
A‧‧‧主出光軸 A‧‧‧Main optical axis
第1圖，為本發明第一實施方式之平面示意圖。 Figure 1 is a schematic plan view of the first embodiment of the present invention.
第2圖，為本發明第一實施方式之剖面示意圖。 FIG. 2 is a schematic cross-sectional view of the first embodiment of the present invention.
第3圖，為本發明第一實施方式另一實施態樣之平面示意圖。 FIG. 3 is a schematic plan view of another embodiment of the first embodiment of the present invention.
第4圖，為本發明第二實施方式之平面示意圖。 Fig. 4 is a schematic plan view of a second embodiment of the invention.
第5圖，為本發明第三實施方式之平面示意圖。 Fig. 5 is a schematic plan view of a third embodiment of the invention.
第6圖，為本發明第四實施方式之平面示意圖。 Fig. 6 is a schematic plan view of a fourth embodiment of the invention.
如前述，目前的導光元件係仍存有出光均勻度不佳之現象，導致後續應用上，部分區域易產生明顯偏暗的視覺呈現，影響光學品味，故本發明人係提出一種如下所述之背光模組及其導光板。請參閱第1及2圖，其係為本發明第一實施方式之平面示意圖及剖面示意圖。該背光模組1係具有一導光板2及至少一第一發光元件3，且背光模組1係可應用於電子裝置如發光鍵盤等，導光板2具有一出光面20，且於出光面20上具有至少一第一開槽201及複數微結構區202，該些微結構區202間隔設置於出光面20供以形成出光。詳細言，各微結構區202係分別對應鍵盤按鍵之位置而設置，於應用時即可使光線於該些微結構區202形成出光，而點亮對應的鍵盤按鍵，並各微結構區202中可佈設有網點結構以利光線於該區域內形成出光。其中為利於說明，故於各圖中係以實線表示各微結構區202，然實際上該些微結構區202並非利用實際線條於出光面20分割形成。第一開槽201位於出光面20之一中央區域203內，第一發光元件3則容置於第一開槽201中，以提供光線予導光板2。其中，第一開槽201之內壁係對應第一發光元件3形成一入光面2011，第一發光元件3之光線即藉由入光面2011進入導光板2內，並受出光面20對應各微結構區202形成出光。特別一提的是，基於安裝、散熱或光學需求等因素，導光板2除具前述結構外，亦 須開設一個或多個貫孔21，以便達成該些需求，並該些貫孔21並不設置於任二微結構區202之間，避免佔據微結構區202而影響其出光效能，於此先行敘明。 As mentioned above, the current light guide element still has the phenomenon of poor light uniformity, which leads to the obvious darker visual appearance in some areas in subsequent applications, which affects the optical taste. Therefore, the inventor proposes a method as follows Backlight module and its light guide plate. Please refer to FIGS. 1 and 2, which are a schematic plan view and a schematic cross-sectional view of the first embodiment of the present invention. The backlight module 1 has a light guide plate 2 and at least one first light emitting element 3, and the backlight module 1 can be applied to electronic devices such as a light-emitting keyboard, etc. The light guide plate 2 has a light exit surface 20, and the light exit surface 20 There are at least one first slot 201 and a plurality of micro-structure regions 202 on the light-emitting surface 20 for forming light. In detail, each micro-structured area 202 is respectively arranged corresponding to the position of the keyboard keys, and when applied, light can be formed in the micro-structured areas 202 to light up the corresponding keyboard keys, and each micro-structured area 202 can be A dot structure is arranged to facilitate light to form light in this area. For the convenience of description, each microstructure region 202 is indicated by a solid line in each figure. However, in practice, the microstructure regions 202 are not formed by dividing the light emitting surface 20 with actual lines. The first slot 201 is located in a central region 203 of the light exit surface 20, and the first light emitting element 3 is accommodated in the first slot 201 to provide light to the light guide plate 2. Wherein, the inner wall of the first slot 201 forms a light incident surface 2011 corresponding to the first light emitting element 3, the light of the first light emitting element 3 enters the light guide plate 2 through the light incident surface 2011, and corresponds to the light exit surface 20 Each microstructure region 202 forms light. In particular, based on factors such as installation, heat dissipation, or optical requirements, in addition to the aforementioned structure, the light guide plate 2 must also have one or more through holes 21 to meet these requirements, and these through holes 21 are not It is arranged between any two micro-structure regions 202 to avoid occupying the micro-structure region 202 and affecting its light output efficiency, which will be described first.
所述背光模組1之特徵在於，導光板2之出光面20更具有至少一第一導光區204及至少一第一補光區205，第一導光區204為直線態樣，並由第一發光元件3沿其出光方向延伸至第一補光區205且穿越至少一微結構區202。其中，微結構區202與第一導光區204重疊區域內之取光能力，係小於微結構區202未與第一導光區204重疊區域內之取光能力，藉此使第一發光元件3之部分光線沿第一導光區204行進而被導引至第一補光區205，以提高導光板2的整體出光品質與光學品味。藉由第一導光區204，確保第一發光元件3至少有部分光線可達到導光板2出光面20的第一補光區205，而較佳者，第一發光元件3係依據所需發光需求，而可呈朝向出光面20之一短邊20a或一長邊20b發光之態樣，亦即使第一發光元件3之主出光軸A朝向短邊20a或長邊20b照射之意。或如本實施例所示，出光面20具有相對設置之二短邊20a，且第一發光元件3為複數設置，至少一第一發光元件3係朝向其中之一短邊20a發光，亦即使第一發光元件3之主出光軸A朝向其中之一短邊20a照射，至少一第一發光元件3係朝向另一短邊20a發光，亦即使第一發光元件3之主出光軸A朝向另一短邊20a照射。藉此，以使導光板2整體各區域皆具有可供以利用之足夠光線能量。並為了讓第一發光元件3之光線不會受到貫孔21結構影響，而降低導光板2部分區域的光場，故於此亦可讓第一發光元件3之主出光軸A偏離於其發光範圍內之至少一貫孔21。 The feature of the backlight module 1 is that the light emitting surface 20 of the light guide plate 2 further has at least one first light guide area 204 and at least one first light supplement area 205. The first light guide area 204 is linear, and is composed of The first light-emitting element 3 extends to the first light-filling area 205 along its light exit direction and passes through at least one microstructure area 202. Wherein, the light extraction capability in the overlapping area of the microstructure area 202 and the first light guide area 204 is less than the light extraction capability in the area where the microstructure area 202 does not overlap the first light guide area 204, thereby enabling the first light emitting element Part 3 of the light travels along the first light guide area 204 and is then guided to the first light supplement area 205 to improve the overall light output quality and optical taste of the light guide plate 2. With the first light guide area 204, it is ensured that at least part of the light of the first light emitting element 3 can reach the first light fill area 205 of the light emitting surface 20 of the light guide plate 2, and preferably, the first light emitting element 3 emits light according to the need According to requirements, the light emitting surface 20 may emit light toward one of the short side 20a or a long side 20b, even if the main light emitting axis A of the first light emitting element 3 illuminates toward the short side 20a or the long side 20b. Or as shown in this embodiment, the light-emitting surface 20 has two short sides 20a oppositely arranged, and the first light emitting element 3 is provided in plural, at least one first light emitting element 3 emits light toward one of the short sides 20a, even if the first The main light emitting axis A of a light emitting element 3 is irradiated toward one of the short sides 20a, and at least one first light emitting element 3 emits light toward the other short side 20a, even if the main light emitting axis A of the first light emitting element 3 faces another short side Side 20a is illuminated. In this way, each area of the light guide plate 2 as a whole has enough light energy to be utilized. In order to prevent the light of the first light-emitting element 3 from being affected by the structure of the through hole 21 and reduce the light field of the light guide plate 2 in a partial area, the main light-emitting axis A of the first light-emitting element 3 can also be deviated from its light emission At least one through hole 21 in the range.
於本實施方式中，第一補光區205係指導光板2上所形成之暗區，以應用於發光鍵盤的導光板2而言，由於第一發光元件3設置於中央區域203，當光線自導光板2中央往其他方向傳遞後，導光板2之角落區域因與第一發光元件3之距離較遠，且中途光線能量亦會於微結構區202形成出光而導致損耗，待光線傳遞至角落區域時已不具足夠能量形成足夠亮度出光，因此暗區多半會位於出光面20之角落區域，於本實施例中即以第一補光區205位於導光板2角落為例說明，惟第一補光區205仍可視實際應用時導光板2上的暗區位置而設置，並不侷限於前述態樣。 In this embodiment, the first fill-in area 205 is a dark area formed on the light-guiding plate 2. For the light-guiding plate 2 applied to a light-emitting keyboard, since the first light-emitting element 3 is disposed in the central area 203, when light After the center of the light guide plate 2 is transmitted in other directions, the corner area of the light guide plate 2 is farther away from the first light-emitting element 3, and the light energy in the middle will also form light in the microstructure area 202 and cause loss, until the light is transmitted to the corner The area does not have enough energy to generate enough brightness to emit light, so the dark area will most likely be located in the corner area of the light emitting surface 20. In this embodiment, the first fill light area 205 is located in the corner of the light guide plate 2 as an example, but the first supplement The light area 205 can still be set according to the position of the dark area on the light guide plate 2 in actual application, and is not limited to the foregoing.
其中，本實施方式之導光板2，係使微結構區202與第一導光區204重疊區域內的取光能力，小於微結構區202未與第一導光區204重疊區域內之取光能力，例如可讓第一導光區204中不具有任何微結構，而進一步確保光線進入導光板2內傳輸後，不會在出光面20對應第一導光區204內形成出光狀態。亦可使微結構區202與第一導光區204重疊區域佈設有些許微結構，但滿足前述取光能力表現，以順利使光線沿第一導光區204傳遞至第一補光區205處。 Wherein, the light guide plate 2 of this embodiment makes the light extraction capability in the overlapping area of the microstructure area 202 and the first light guide area 204 smaller than that in the area where the microstructure area 202 does not overlap the first light guide area 204 The ability, for example, allows the first light guide region 204 not to have any microstructures, and further ensures that after the light enters the light guide plate 2 and is transmitted, it does not form a light emitting state in the first light guide region 204 corresponding to the light exit surface 20. It is also possible to arrange some microstructures in the overlapping area of the microstructure area 202 and the first light guide area 204, but satisfy the aforementioned performance of light extraction ability, so as to smoothly transmit light along the first light guide area 204 to the first fill area 205 .
進一步地，請續參閱第3圖，其係為本發明第一實施方式另一實施態樣之平面示意圖。其中，第一導光區204除可為等寬直線狀態樣，亦可如本實施態樣所示，為由第一發光元件3朝第一補光區205漸寬設置之態樣，而因應第一補光區205態樣取得更佳之導光效果，有效地填補第一補光區205的亮度。並較佳者，第一導光區204之寬度係介於1~2mm，避免第一導光區204過窄影響導引光線之效能，無法使光線順利到達第一補光區205，或第一導光區204過寬而使過多的光線被傳遞至第一補光區205， 除了造成穿越之微結構區202亮度不足外，甚可能造成第一補光區205過亮之情況，反而使導光板2整體的出光均勻度下降。 Further, please refer to FIG. 3, which is a schematic plan view of another embodiment of the first embodiment of the present invention. In addition, the first light guide region 204 may be a state of a straight line with a constant width, or as shown in the embodiment, it is a state that the first light emitting element 3 is gradually widened toward the first light supplementing region 205. The aspect of the first fill light area 205 achieves a better light guiding effect, and effectively fills the brightness of the first fill light area 205. Preferably, the width of the first light guide region 204 is between 1 and 2 mm, to avoid that the first light guide region 204 is too narrow to affect the efficiency of guiding light, and the light cannot reach the first fill region 205 smoothly, or the first A light guide area 204 is too wide and excessive light is transmitted to the first fill light area 205. In addition to the insufficient brightness of the microstructure area 202 passing through, it may even cause the first fill light area 205 to be too bright. The uniformity of light output of the light guide plate 2 as a whole decreases.
請續參閱第4圖，其係為本發明第二實施方式之平面示意圖。承第一實施方式，相同之技術特徵細節，於此即不再贅述。於本實施方式中，導光板2更包括一第二導光區206，第二導光區206為直線態樣，並由第一發光元件3沿其出光方向延伸至一第二補光區207且穿越至少一微結構區202。其中微結構區202與第二導光區206重疊區域內之取光能力，係小於微結構區202未與第二導光區206重疊區域內之取光能力，以有效導引光線至第二補光區207。除了如前述實施方式，使第一發光元件3透過第一導光區204補亮第一補光區205外，更可進一步再設置第二導光區206，使第一發光元件3可同時針對導光板2之多個暗區進行補光，而提升整體出光均勻度。同樣地，第二導光區206亦可同於第一導光區204為等寬態樣，或由第一發光元件3朝第二補光區207呈漸寬設置。 Please refer to FIG. 4, which is a schematic plan view of a second embodiment of the invention. According to the first embodiment, the same technical feature details will not be repeated here. In this embodiment, the light guide plate 2 further includes a second light guide area 206. The second light guide area 206 is linear and extends from the first light emitting element 3 to a second light supplement area 207 along its light emitting direction And through at least one microstructure area 202. The light extraction capability in the overlapping area of the microstructure area 202 and the second light guide area 206 is less than the light extraction capability in the area of the microstructure area 202 not overlapping the second light guide area 206, so as to effectively guide light to the second Fill light area 207. In addition to the first embodiment, the first light-emitting element 3 is used to fill the first light-guiding area 205 through the first light-guiding area 204, and a second light-guiding area 206 can be further provided so that the first light-emitting element 3 can be aimed at A plurality of dark areas of the light guide plate 2 are used for supplementary light to improve the overall light uniformity. Similarly, the second light guide region 206 can be the same width as the first light guide region 204, or it can be gradually widened from the first light emitting element 3 toward the second fill region 207.
請續參閱第5圖，其係為本發明第三實施方式之平面示意圖。承第一實施方式及第二實施方式，相同之技術特徵細節，於此即不再贅述。除了使部分第一發光元件3分別朝向二短邊20a發光外，於本實施態樣中，更進一步地揭露使至少一第一發光元件3朝出光面20之一長邊20b發光，而長邊20b係與該些短邊20a相互垂直。藉此，透過照射至出光面20長邊20b之第一發光元件3，即可補償朝向二短邊20a發光之該些第一發光元件3之間的發光輝度，進而提升整體出光均勻性。 Please refer to FIG. 5, which is a schematic plan view of a third embodiment of the present invention. According to the first embodiment and the second embodiment, the same technical feature details are not repeated here. In addition to causing part of the first light emitting elements 3 to emit light toward the two short sides 20a, in this embodiment, it is further disclosed that at least one first light emitting element 3 emits light toward the long side 20b of the light emitting surface 20, and the long side 20b is perpendicular to these short sides 20a. In this way, by irradiating the first light-emitting elements 3 on the long sides 20b of the light-emitting surface 20, the light-emitting luminance between the first light-emitting elements 3 that emits light toward the two short sides 20a can be compensated, thereby improving the overall light-emitting uniformity.
請續參閱第6圖，其係為本發明第四實施方式之平面示意圖。承第一、第二與第三實施方式，相同之技術特徵細節，於此即不再贅 述。於本實施方式中，更包括一第二發光元件4及一第二開槽208，第二開槽208位於中央區域203內，供以容置第二發光元件4，並第二導光區206為直線態樣，並由第二發光元件4沿其出光方向延伸至第一補光區205且穿越至少一微結構區202。其中微結構區202與第二導光區206重疊區域內之取光能力，係小於微結構區202未與第二導光區206重疊區域內之取光能力，以將第二發光元件4之部分光線導引至第一補光區205，使第一補光區205可同時接收第一發光元件3與第二發光元件4之補充光線，提升該區的亮度而有效地均勻化導光板2整體出光品質。而第一發光元件3與第二發光元件4之出光方向可如前述各實施方式所敘，可同時朝向出光面20之一短邊20a照射；或第一發光元件3照射其中之一短邊20a，而第二發光元件4照射另一相對之短邊20a；或分別配置第一發光元件3與第二發光元件4形成對出光面20之二短邊20a與至少一長邊20b照射之態樣等。 Please refer to FIG. 6, which is a schematic plan view of a fourth embodiment of the present invention. Following the first, second and third embodiments, the same technical feature details are not repeated here. In this embodiment, a second light-emitting element 4 and a second slot 208 are further included. The second slot 208 is located in the central area 203 for accommodating the second light-emitting element 4 and the second light guide region 206 It is linear and extends from the second light-emitting element 4 to the first light-filling region 205 along its light-emitting direction and passes through at least one microstructure region 202. The light extraction capability in the overlapping area of the microstructure area 202 and the second light guide area 206 is less than the light extraction capability in the area of the microstructure area 202 not overlapping the second light guide area 206, so that the second light emitting element 4 Part of the light is guided to the first light supplementing area 205, so that the first light supplementing area 205 can receive the supplementary light of the first light-emitting element 3 and the second light-emitting element 4 at the same time, enhance the brightness of the area and effectively uniformize the light guide plate 2 Overall light quality. The light-emitting directions of the first light-emitting element 3 and the second light-emitting element 4 may be as described in the foregoing embodiments, and may simultaneously illuminate one short side 20a of the light-emitting surface 20; , And the second light-emitting element 4 irradiates another opposite short side 20a; or the first light-emitting element 3 and the second light-emitting element 4 are respectively arranged to form the state of illuminating the two short sides 20a and at least one long side 20b of the light-emitting surface 20 Wait.
請復參閱1~6圖，本發明亦揭示一種導光板2，供以配合至少一第一發光元件3使用，導光板2具有一出光面20，且出光面20更具有至少一第一開槽201及複數微結構區202，微結構區202間隔設置於出光面20以供形成出光，第一開槽201係位於出光面20之一中央區域203，供以容置第一發光元件3，出光面20更具有至少一第一導光區204及至少一第一補光區205，第一導光區204為直線態樣，並由第一發光元件3沿其出光方向延伸至第一補光區205且穿越至少一微結構區202；其中微結構202區與第一導光區204重疊區域內之取光能力，係小於微結構區202未與第一導光區204重疊區域內之取光能力，藉此使第一發光元件3之部分光線沿第一導光區204行進而被導引至第一補光區205。其餘細部特徵請參閱前述各 實施方式內容，於此即不重述。 Please refer to FIGS. 1 ~ 6 again, the present invention also discloses a light guide plate 2 for use with at least one first light emitting element 3, the light guide plate 2 has a light exit surface 20, and the light exit surface 20 further has at least a first slot 201 and a plurality of microstructure regions 202, the microstructure regions 202 are spaced apart on the light emitting surface 20 for forming light output, and the first slot 201 is located in a central region 203 of the light emitting surface 20 for accommodating the first light emitting element 3 to emit light The surface 20 further has at least one first light guide area 204 and at least one first fill light area 205. The first light guide area 204 is linear and extends from the first light emitting element 3 to the first fill light along its light emitting direction Area 205 and traverses at least one microstructure area 202; wherein the light extraction capability of the microstructure area 202 and the first light guide area 204 overlap is smaller than the microstructure area 202 does not overlap with the first light guide area 204 The light capability allows part of the light of the first light-emitting element 3 to travel along the first light guide region 204 and then be guided to the first light supplement region 205. For the rest of the detailed features, please refer to the foregoing embodiments, and they will not be repeated here.
綜上所述，本發明所揭示之背光模組與其導光板，利用光路設計之概念於導光板設置第一導光區，使發光元件的部分光線可依循第一導光區路徑被導向出光面上屬於較暗區域之補光區，使光線不會在微結構區或受貫孔影響耗損過多能量，進而提高整體出光均勻度與光學品味。而第一導光區除可為等寬設計，也可依據需求為漸寬設置。並且，除了前述方式，因應所需之補光需求，亦可作各種設計變化。例如進一步於出光面增設第二導光區，使第一發光元件之部分光線除了可補亮第一補光區外，更可透過第二導光區針對出光面其他暗區形成之第二補光區提供光線，達到單一第一發光元件即可有效補償多個暗區之功效。或可增設第二發光元件，並使第二發光元件部分光線透過對應之第二導光區傳導至第一補光區，達到利用多個發光元件有效補償單一補光區之功效。 In summary, the backlight module and the light guide plate disclosed in the present invention use the concept of optical path design to provide a first light guide area on the light guide plate, so that part of the light of the light emitting element can be guided to the light exit surface according to the path of the first light guide area The upper part belongs to the darker area of the fill light area, so that the light will not consume too much energy in the microstructure area or the through hole, thereby improving the overall light uniformity and optical taste. The first light guide area can be of equal width design or can be gradually widened according to requirements. In addition to the aforementioned methods, various design changes can be made in response to the required fill light requirements. For example, a second light guide area is further added to the light exit surface, so that part of the light of the first light-emitting element can not only fill up the first light supplement area, but also pass through the second light guide area to form a second supplement for other dark areas on the light exit surface. The light area provides light so that a single first light-emitting element can effectively compensate the effect of multiple dark areas. Alternatively, a second light-emitting element may be added, and part of the light of the second light-emitting element may be transmitted to the first light-filling area through the corresponding second light-guiding area, so as to effectively compensate a single light-filling area by using multiple light-emitting elements.
惟，以上所述者，僅為本發明之較佳實施例而已，並非用以限定本發明實施之範圍；故在不脫離本發明之精神與範圍下所作之均等變化與修飾，皆應涵蓋於本發明之專利範圍內。 However, the above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention; therefore, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered in Within the patent scope of the invention.
Claims (9)
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| TW106104750A TW201830068A (en) | 2017-02-14 | 2017-02-14 | A back light module and light guide plate thereof |
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| TW106104750A TW201830068A (en) | 2017-02-14 | 2017-02-14 | A back light module and light guide plate thereof |
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| TW201830068A true TW201830068A (en) | 2018-08-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI743913B (en) * | 2020-07-30 | 2021-10-21 | 群光電子股份有限公司 | Illuminated keyboard |
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| TWI743913B (en) * | 2020-07-30 | 2021-10-21 | 群光電子股份有限公司 | Illuminated keyboard |
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