1260434 五、發明說明（1) 【發明所屬之技術領域】 較高光模組及其導光板，尤指-種具 r,^ 又之月光模組及其導光板。 L无則技術】 由枰ί ;曰::員示器為1重非自發光顯示裝置，其顯示主要藉 二 °卩光源所發出光束之通過或者不通過來實現，因 之背光模組或者前光模組，該背光或者前光模 俨。：邛光源所發出之光束導向顯示面板，實現顯示功 +明茶閱第一圖’係一種先前技術之背光模組1，該背 光模組1包括二LED光源U、一反射板12、一導光板13、一 擴散板14及一增亮片15。該導光板13大致為平板形，其包 括了入光面131、一底面〗33及一出光面132。其中該光源 U係相對於導光板13之入光面131設置，該反射板12、導 光板1 3、擴散板1 4及增亮片1 5依次層疊放置。由光源丨丨發 出之，束，經導光板13、反射板12及擴散板14作用後導向 違增党片1 5，該增亮片1 5表面均勻分佈有複數平行之稜鏡 、、、。構1 5 1，该稜鏡結構1 5 1將該光束聚集並導向顯示面板 (圖未示）。惟，該背光模組丨採用之元件數目較多且各元 件均分立，故光束介面反射之光能損失較大，該背光模組 1出光輝度較低，且增亮片1 5之價格較高，致使該背光模 組1成本較南。 、 請參閱第二圖，為克服上述缺點，先前技術提供另一 種背光模組2，該背光模組2包括二LED光源21、一反射板 1260434 五、發明說明（2) 23，一導光 鏡結構2 2 2 其中該 該反射板23 可省掉增亮 光板2 0之透 導光板20表 源近端與遠 易形成暗帶 有鑑於 光模組及導 【發明内容 本發明 度之導光板 本發明 均勻度之背 本發明 括：至少一 面’其係用 底面散射、 \光面垂直 鏡寬度變化 寬度從此二 份之稜鏡寬 板2 0。該導光板2 〇之出光面2 〇 2上分佈複數棱 ，該導光板20之底面2 0 3分佈有網點結構221。 光源2 1係相對於導光板2 〇之入光面2 〇 1設置， 、導光板20層疊放置。此種結構之背光模組2 片f本惟，因平订佈置之稜鏡結構2 2 2鱼導 體成形，稜鏡結構222均勾分佈於 面，稜鏡結構222只有聚弁# 、 踹之媸庚至门 广永先作用’無法改變光 鈿之輝度羞，因而均勻度較 ，影響視覺效果。 ^ ^ ^ fa1 Ϊ板無暗帶且具較高出光均句度之背 九扳貫為必需。 ] 之目的在於提供一種無暗帶且具較高出光均勻 之另目的在於提供一種無暗帶且 光模組。 ”罕乂问出九 所提供用於配合至少二LED光源之導光 入光面，其係用於接收外部之入射光東麻 於散射、反射該入射光束；一出4束二； 反身:之光束導出；其中，該出光面具有複：： 之棱鏡結構，該稜鏡結構之棱鏡 ^ ，其分佈方式為:對應二相鄰LED光;=二； L E D光源内側邊緣至其中間逐漸減小、，’之上鏡 度等於稜鏡週期。 其餘41260434 V. INSTRUCTIONS (1) [Technical Fields According to the Invention] A higher optical module and a light guide plate thereof, in particular, a moonlight module and a light guide plate thereof. L is not technology] 枰ί ;曰:: The indicator is a 1-weight non-self-luminous display device, the display is mainly realized by the passage or non-passing of the light beam emitted by the 2° 卩 light source, because the backlight module or the front light Module, the backlight or the front light module. The light beam emitted by the xenon light source is directed to the display panel to realize the display work + the first picture of the tea is a backlight module 1 of the prior art, and the backlight module 1 includes two LED light sources U, a reflection plate 12, and a guide. The light plate 13, a diffusion plate 14, and a brightness enhancement sheet 15. The light guide plate 13 is substantially in the shape of a flat plate, and includes a light incident surface 131, a bottom surface 33, and a light exit surface 132. The light source U is disposed on the light incident surface 131 of the light guide plate 13, and the reflector 12, the light guide plate 13, the diffusion plate 14 and the brightness enhancement sheet 15 are sequentially stacked. The light beam is emitted from the light source, and is guided by the light guide plate 13, the reflection plate 12 and the diffusion plate 14 to guide the violation of the party piece 15 , and the surface of the brightness enhancement film 15 is evenly distributed with a plurality of parallel lines 、 , , , . The structure 1 5 1 gathers the light beam and directs it to the display panel (not shown). However, the backlight module uses a large number of components and each component is separated, so that the light energy loss of the beam interface reflection is large, the backlight module 1 has a low light-emitting luminance, and the price of the brightness-increasing film 15 is relatively high. The backlight module 1 is relatively cost-effective. Referring to the second figure, in order to overcome the above disadvantages, the prior art provides another backlight module 2, which includes two LED light sources 21, a reflector 1260434, and a description (2) 23, a light guide mirror. Structure 2 2 2 wherein the reflector 23 can eliminate the brightness-increasing plate 20 of the transparent light guide plate 20, the near end of the source and the far-reaching dark band, in view of the optical module and the guide [the invention of the present invention, the light guide plate BACKGROUND OF THE INVENTION The invention includes: at least one side of which is scattered by the bottom surface, and the width of the vertical mirror width of the smooth surface is changed from the width of the wide plate 20 to the top. A plurality of ribs are distributed on the light-emitting surface 2 〇 2 of the light guide plate 2, and a bottom dot structure 221 is disposed on the bottom surface of the light guide plate 20. The light source 2 1 is disposed relative to the light incident surface 2 〇 1 of the light guide plate 2 , and the light guide plate 20 is stacked. The backlight module 2 of the structure has the same shape, and the 稜鏡 structure 2 2 2 fish conductor is formed by the flat arrangement, and the 稜鏡 structure 222 is hooked on the surface, and the 稜鏡 structure 222 is only 弁 、 、 、 Geng to the door Guang Yong first role 'can not change the brightness of the light shy, so the uniformity is more, affecting the visual effect. ^ ^ ^ fa1 The seesaw has no dark band and has a higher light-emitting period. The purpose of the invention is to provide a dark-bandless and uniform light-emitting uniform. "Nanhan asked nine light-guided light-incident surfaces for matching at least two LED light sources, which are used to receive external incident light to scatter and reflect the incident light beam; one out of four beams; reflexive: The light beam is led out; wherein the light exiting surface has a complex prism structure, and the prism of the 稜鏡 structure is distributed in the following manner: corresponding to two adjacent LED lights; =2; the inner edge of the LED light source is gradually reduced to the middle thereof , 'The mirror is equal to the 稜鏡 period. The remaining 4
第6胃 1260434 五、發明說明（3) ' --〜〜 本發明之背光模組包括：至少二LE])光源；一導光 f ’係用以接收來自該至少二LED光源發出之光束並將其 導出；其中，該導光板具至少一入光面、一出光面及」、广 面’該至少二LED光源相對該至少一入光面設置，該至少氐 一入光面用以接收該至少二led光源所發出之光束。其 中’該出光面具有複數與入光面垂直之棱鏡結構，該棱於 結構之稜鏡週期恆定，稜鏡寬度變化，其分佈方式為對兄 應二相鄰LED光源間之稜鏡寬度從此：LED光源内側邊緣至 其中間逐漸減小，其餘部份之稜鏡寬度等於棱鏡週期。 相較於先前技術，本發明背光模組之導光板出光面具 有複數與入光面垂直之棱鏡結構，該稜鏡結構之稜鏡週^ I*亙疋’對應一LED光源間稜鏡寬度變小，該結構可有效提 高該出光面之出光均勻度，從而提高背光模組之出光均勻 度，並可消除暗帶。 【實施方式】 清一併參閱第四圖及第五圖，分別係本發明背光模組 第一實施方式之立體圖與主視圖。該背光模組3包括二led 光源31及一導光板30。其中，該導光板30係用以接收來自 該二LED光源31發出之光束並將其導出；其具一入光面 301、一出光面302及一與入光面301垂直而與出光面相 〆對之底面303，該底面303均勻設置有複數網點34。 其中’该出光面302具有複數與入光面垂直之稜鏡結 構33，該棱鏡結構33之棱鏡週期τ恆定，稜鏡寬度b變化， 其分佈方式為：對應該二LED光源31間之稜鏡寬度b從此二The sixth stomach 1260434 V. The invention description (3) '-~~ The backlight module of the present invention comprises: at least two LE] light sources; a light guide f' is for receiving light beams emitted from the at least two LED light sources Deriving the light guide plate, wherein the light guide plate has at least one light incident surface, a light exit surface, and a wide surface, wherein the at least two LED light sources are disposed opposite to the at least one light incident surface, and the at least one light incident surface is configured to receive the light guide surface At least two beams emitted by the led light source. Wherein the illuminating surface has a plurality of prism structures perpendicular to the incident surface, the ribs are constant in the period of the structure, and the width of the ridge varies, and the distribution pattern is the width between the adjacent LED light sources of the brothers: The inner edge of the LED light source is gradually reduced from the middle to the middle, and the width of the remaining portion is equal to the prism period. Compared with the prior art, the light-emitting surface of the light guide plate of the backlight module of the present invention has a plurality of prism structures perpendicular to the light-incident surface, and the circumference of the 稜鏡 structure is corresponding to the width of the LED light source. Small, the structure can effectively improve the light uniformity of the light-emitting surface, thereby improving the light uniformity of the backlight module and eliminating the dark band. [Embodiment] Referring to FIG. 4 and FIG. 5, respectively, a perspective view and a front view of a first embodiment of a backlight module of the present invention are shown. The backlight module 3 includes two LED light sources 31 and a light guide plate 30. The light guide plate 30 is configured to receive the light beams emitted from the two LED light sources 31 and to lead them out; the light incident surface 301, a light exit surface 302, and a light incident surface 301 are perpendicular to the light emitting surface and opposite to the light emitting surface. The bottom surface 303 is uniformly provided with a plurality of dots 34. Wherein the light exiting surface 302 has a plurality of ridge structures 33 perpendicular to the light incident surface, the prism period τ of the prism structure 33 is constant, and the 稜鏡 width b varies, and the distribution manner is: corresponding to the gap between the two LED light sources 31 Width b from this two
第7頁 1260434 五、發明說明（4) L E D光源内側邊緣至其中間逐漸減小到棱鏡週期τ之1 / 3， 其餘部份之棱鏡寬度B等於棱鏡週期丁。 該二LED光源31相對該入光面3〇1設置，該入光面 用以接收该一 L E D光源3 1所發出之光束，該底面3 〇 3將該光 束散射、反射後導向出光面302，由出光面3〇2將該光束導 出。 因為棱鏡結構33之集光作用同棱鏡週期τ與稜鏡寬度b 之比值呈近似線性關係的原理，藉由上述結構對led光束 之修正，可形成如第七圖所示之LED等效光路示意圖，相 較先前技術之背光模組結構，光束更集中（參照第三圖）， 光源間之光束亮度增強，故，可使暗帶消除，並有效提高 背光模組之出光均勻度。 請參閱第六圖，為本發明背光模組第二實施方式之主 視圖。該背光模組4包括三LED光源41及一導光板4〇。其 中’該導光板40係用以接收來自該三LED光源41發出之光 束並將其導出；其具一入光面4〇1、一出光面402及一與入 光面401垂直而與出光面402相對之底面403，該底面4〇3均 勻設置有複數網點4 4。 . 其中，該出光面402具有複數與入光面4〇1垂直之棱鏡 結構43，該稜鏡結構43之棱鏡週期T恆定，稜鏡寬度B變 化’其分佈方式為：該稜鏡結構4 3之稜鏡寬度B從對應二相 鄰LED光源4 1内側邊緣至其中間逐漸減小到稜鏡週期τ之 1 / 3 ’其餘部份之棱鏡寬度β等於稜鏡週期τ。 該三LED光源41相對該入光面401設置，該入光面4〇1Page 7 1260434 V. INSTRUCTIONS (4) The inner edge of the L E D source is gradually reduced to 1 / 3 of the prism period τ, and the prism width B of the remaining portion is equal to the prism period. The two LED light sources 31 are disposed opposite to the light incident surface 3〇1, and the light incident surface is configured to receive the light beam emitted by the LED light source 31, and the bottom surface 3〇3 scatters and reflects the light beam to the light exit surface 302. The light beam is led out by the light exit surface 3〇2. Because the light collecting action of the prism structure 33 is in a nearly linear relationship with the ratio of the prism period τ to the 稜鏡 width b, the modification of the led beam by the above structure can form an equivalent optical path diagram of the LED as shown in the seventh figure. Compared with the backlight module structure of the prior art, the beam is more concentrated (refer to the third figure), and the brightness of the beam between the light sources is enhanced, so that the dark band can be eliminated and the uniformity of the light output of the backlight module can be effectively improved. Please refer to the sixth figure, which is a front view of a second embodiment of the backlight module of the present invention. The backlight module 4 includes a three LED light source 41 and a light guide plate 4〇. The light guide plate 40 is configured to receive and emit a light beam emitted from the three LED light sources 41. The light guide plate 40 has a light incident surface 4, a light exit surface 402, and a light exit surface 401 perpendicular to the light exit surface 401. 402 is opposite to the bottom surface 403, and the bottom surface 4〇3 is uniformly provided with a plurality of dots 44. Wherein, the light-emitting surface 402 has a plurality of prism structures 43 perpendicular to the light-incident surface 4〇1, and the prism period T of the 稜鏡 structure 43 is constant, and the 稜鏡 width B changes 'the distribution pattern is: the 稜鏡 structure 4 3 The width B of the ridge is then equal to the 稜鏡 period τ from the inner edge of the corresponding two adjacent LED light sources 4 1 to the gradual decrease from the middle to the 1/3 of the 稜鏡 period τ. The three LED light sources 41 are disposed opposite to the light incident surface 401, and the light incident surface 4〇1
第8頁 1260434 五、發明說明（5) 用以接收該二LED光源41所發出之光束，該底面4〇3將該光 束散射、反射後導向出光面4〇2，由出光面4〇2將該光束導 出0 因為棱鏡結構43之集光作用同棱鏡週期τ與稜鏡寬度B 之比值呈近似線性關係的原理，藉由上述結構對LED光束 之修正’可形成如第七圖所示之LEI)等效光路示意圖，相 較先A技術之为光模組結構，光束更集中（參照第三圖）， 光源間之光束亮度增強，故，可使暗帶消除，並有效提高 背光模組之出光均勻度。Page 8 1260434 V. Description of the invention (5) for receiving the light beam emitted by the two LED light sources 41, the bottom surface 4〇3 scatters and reflects the light beam to the light exit surface 4〇2, which is to be emitted by the light exit surface 4〇2 The beam is derived from 0 because the light collecting action of the prism structure 43 is approximately linear with the ratio of the prism period τ to the 稜鏡 width B, and the correction of the LED beam by the above structure can form the LEI as shown in the seventh figure. The equivalent optical path diagram, compared with the first A technology as the optical module structure, the beam is more concentrated (refer to the third figure), the brightness of the beam between the light sources is enhanced, so that the dark band can be eliminated, and the backlight module is effectively improved. Light uniformity.
一本發明之‘光板底面所設置之複數網點所採用之材料 為南發散光物其形狀可為圓形、方形或菱形，其分佈 方式亦可為μ遠離入光面逐漸增加其大小或密度。同時可 相對導光板之底面設置一反射才反，該反射板可將導光板洩 漏之光束反射入導光板’提高導光板出光面之輝度。該反 射板亦可為反射膜，該反射膜貼覆於導光板之底面。另， 该導光板之底面亦可與入光面傾斜相交。背光模組之lei) 光源數量亦可多於三個。A material used for the plurality of dots disposed on the bottom surface of the optical plate of the present invention is a south astigmatism whose shape may be a circular shape, a square shape or a diamond shape, and may be distributed in such a manner that the size or density of μ is gradually increased away from the light incident surface. At the same time, a reflection can be arranged opposite to the bottom surface of the light guide plate, and the reflector can reflect the light beam leaking from the light guide plate into the light guide plate to improve the brightness of the light exit surface of the light guide plate. The reflective plate may also be a reflective film that is attached to the bottom surface of the light guide plate. In addition, the bottom surface of the light guide plate may also obliquely intersect the light incident surface. The backlight module can have more than three light sources.
綜上所述，本發明符合發明專利要件，爰依法提出專 利申明。惟’以上所述者僅為本發明之較佳實施方式，舉 凡先、心本案技藝之人士，在援依本案發明精神所作之等效 G飾或是化’皆應包含於以下之申請專利範圍内。In summary, the present invention complies with the requirements of the invention patent, and proposes a patent declaration according to law. However, the above description is only a preferred embodiment of the present invention, and the equivalent G decoration or chemistry of the person in the spirit of the present invention should be included in the following patent application scope. Inside.
第9頁 1260434Page 9 1260434
第ίο頁 圖式簡單說明 第 一 圖 係 一 種先 前技術背光 模組之立體分解圖 〇 第 二 圖 係 另 一種 先前技術背 光模組之立體圖。 第 二 圖 係 先 前技 術L E D光強度極座標分佈 圖。 第 四 圖 係 本 發明 背光模組第 一實施方式之立體 圖。 第 五 圖 係 第 四圖 所示背光模 組之主視圖。 第 六 圖 係 本 發明 背光模組第 二實施方式之主視 圖。 第 七 圖 係 本 發明L E D光強度極座標分佈圖 〇 [ 主 要 元 件 符號 說明】 背 光 模 組 3、4 入光面 301、 401 出 光 面 3 0 2 > ‘402 底面 3 0 3、 403 稜 鏡 結 構 33 、43 光源 31 、41 網 點 34 λ 44BRIEF DESCRIPTION OF THE DRAWINGS The first figure is an exploded perspective view of a prior art backlight module. The second figure is a perspective view of another prior art backlight module. The second figure is the prior art L E D light intensity polar coordinate distribution map. Fig. 4 is a perspective view showing the first embodiment of the backlight module of the present invention. The fifth picture is the front view of the backlight module shown in Figure 4. Fig. 6 is a front elevational view showing a second embodiment of the backlight module of the present invention. Figure 7 is a diagram showing the distribution of the LED light intensity polar coordinates of the present invention [Main component symbol description] Backlight module 3, 4 light-incident surface 301, 401 light-emitting surface 3 0 2 > '402 bottom surface 3 0 3, 403 稜鏡 structure 33 , 43 light source 31, 41 outlet 34 λ 44