1334950 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種侧光源型（edge_lighttype)背光模 組，特別是關於一種無導光板之側光源型背光模組。 【先前技術】 近年來，卩逍著光電技術的持續發展，顯示器產品不但 在薄型化方面有了長足的進步，並且，相關之薄型化產品 的顯示品質與效能亦有明顯改善，不少薄型化的顯示技術 已可與傳統之陰極射線顯示器相抗衡，且更有超越者。 在薄型化顯示器之中，背光模組係用以提供非自發光 性的顯示面板(例如液晶面板)所需要的背光源。背光模組 在薄型化顯示器巾的重要性並不亞於顯示面板(例如液晶 面板)本身。首先，背光模組在機構上的薄型化與否，對於 員示器整體的薄型化占有很重的比重。其次，背光模組所 提供之光源是否均勻，則對顯示器的成像品質有舉足輕重 的影響。再者，背光模組在電能—光能之間的轉換效能， 則影響了顯示器在發光效率上的表現。 請參照圖一，圖一係為一典型側光源型(edge_Hghttype) 背光模組側剖面示意圖。背光模組1〇主要包括一殼體12、 一導光板14與一光源16，殼體12又包括一基板121以及 至；一側壁123。其中，導光板14與光源16皆設置於殼 體12内部，導光板14設置於基板121上，而光源％設置 於接近设體12崎接近側壁123的位置。光源ί6通常為 冷陰極燈管（CCFL)或發光二極體（led)，其所產生之 5 1334950 光線由側端141進入導光板14,以導光板14為傳播介質， 且利用導光板14與空氣介質的不同而產生界面全反射效 應，使光線均勻散布於導光板14中，最後則由導光板14 之出光面125出射以提供給顯示面板17。 一般來說’側光源型背光模組10相較於另一種背光模 組—直下式背光模組而言，側光源型背光模組10之優點係 在於較易實現薄型化的要求。1334950 IX. Description of the Invention: [Technical Field] The present invention relates to an edge light source type (edge_light type) backlight module, and more particularly to a side light source type backlight module without a light guide plate. [Prior Art] In recent years, with the continuous development of optoelectronic technology, display products have not only made great progress in thinning, but also the display quality and performance of related thin products have been significantly improved, and many thinner. The display technology has been able to compete with traditional cathode ray displays and is even more superior. Among the thinned displays, the backlight module is used to provide a backlight required for a non-self-luminous display panel such as a liquid crystal panel. The backlight module is as important as a display panel (such as a liquid crystal panel) in a thinner display. First of all, the thinness of the backlight module in the mechanism has a heavy weight for the overall thinness of the indicator. Secondly, whether the light source provided by the backlight module is uniform or not has an important influence on the imaging quality of the display. Moreover, the conversion performance of the backlight module between the electric energy and the light energy affects the performance of the display in terms of luminous efficiency. Please refer to FIG. 1 . FIG. 1 is a side cross-sectional view of a typical edge source type (edge_Hght type) backlight module. The backlight module 1A mainly includes a casing 12, a light guide plate 14 and a light source 16. The casing 12 further includes a substrate 121 and a side wall 123. The light guide plate 14 and the light source 16 are both disposed inside the casing 12, the light guide plate 14 is disposed on the substrate 121, and the light source is disposed at a position close to the side wall 123 of the installation body 12. The light source ί6 is usually a cold cathode fluorescent lamp (CCFL) or a light emitting diode (LED), and the generated light of 5 1334950 enters the light guide plate 14 from the side end 141, and the light guide plate 14 is used as a propagation medium, and the light guide plate 14 is used. The interface is totally reflected by the difference in the air medium, so that the light is evenly dispersed in the light guide plate 14, and finally emitted from the light exit surface 125 of the light guide plate 14 to be supplied to the display panel 17. In general, the side light source type backlight module 10 has the advantage that the side light source type backlight module 10 is easier to achieve thinning than the other backlight mode group-direct type backlight module.
請參照圖二’圖二係為一無導光板之側光源型背光模 組示意圖。相較於圖一之背光模組10，圖二背光模組2〇 係不具有導光板14 ’然而，背光模組20之光源26仍然是 設置於其内部（殼體22内部）之側壁223的位置，因此並 不同於習知之直下式背光模組。背光模組20主要是利用設 置於殼體22之基板221之一反射板24，來將位於侧壁223 之光源26的光線反射至顯示面板27。 將背光模組20設計成不具有導光板（可對照圖一導光Please refer to FIG. 2'. FIG. 2 is a schematic diagram of a side light source type backlight module without a light guide plate. Compared with the backlight module 10 of FIG. 1, the backlight module 2 of FIG. 2 does not have the light guide plate 14' However, the light source 26 of the backlight module 20 is still disposed on the sidewall 223 of the inside (the inside of the casing 22). The position is therefore different from the conventional direct type backlight module. The backlight module 20 mainly reflects the light from the light source 26 located on the side wall 223 to the display panel 27 by using one of the reflectors 24 disposed on the substrate 221 of the housing 22. The backlight module 20 is designed not to have a light guide plate (refer to the light guide according to FIG.
板14)的優點係在於因減少了介質介面，而得以提高背光 模組20之光學效率，亦即—對於圖一具有導光板14之背 光模組10而言，光源16所產生的光線必有部份在導光板 14 β產生消耗；而背光模組20則不具此缺點。另一項優點 則疋著眼於減少導光板14的使用’係有助於產品的輕量 化。 然而，由於背光模組20其中之光源26仍然是設置於 =之側壁223的位置’如何使得光線均勻地反射至顯示 :太fV縣此技術領域巾之重要議題。且，在越來越多 ，品係採祕光二極體以做為光源（圖—標號16與圖二 6 = 26)的趨勢下，有鑑於發光二極體所提供之光線亮度 /刀佈係因角度而不同，因此並不均勻，而是呈現三維 ⑽）分佈的情況’在此情形下，如何使得光線均勻地 反射至面板之議題則更為突顯。 【發明内容】 本發明之目的係在於提供—種背光模組，其可以使光 線均勻地反射至顯示器面板。 本發明之另一目的係在於提供一種反射板的製作方 法，其可以使製作出-種使光源之光線均勻地反射至顯示 器面板之反射板。 本發明係揭示-種背光模組，其包括—殼體、一光源 以及一反射板。殼體包含一基板以及一側壁，側壁係鄰接 於基板；光源設置於殼體内部且接近於側壁；反射板設置 於基板上，並具有一反射面，反射面依與側壁大體上垂直 之一橫軸（X-axis)剖視呈一第一曲面，第一曲面由連續 的複數個斜面所構成；反射面更依一縱軸（Y_axis)剖視 呈一第二曲面，第二曲面由連續的複數個斜面所構成，其 中縱軸係正交於橫軸。 該反射面係被複數條第一分隔線區分為複數個橫轴分 區(X-axis partition)，該等第一分隔線係與縱軸平行，且每 一橫軸分區所接收光源之光線係大體上相等；該反射面又 被複數條第二分隔線區分為複數個縱軸分區（Y_axis partition)，該等第二分隔線係與橫軸平行，且每一縱軸分 區所接收光源之光線係大體上相等。 該等第-分隔線以及該等第二分隔線更將反射面分隔 為複數個反射區塊，該些反射區塊係為斜面且分別具有一 松軸傾角以及-雜傾角’藉由該等橫軸㈣的角度不同 以構成第-曲面’ X，藉由該等縱軸傾角的角度不同以構 成第二曲面。在一較佳實施例中，前述之第一曲面係包 括二凹部以及-凸部，又，凸部係介於兩凹部之間；第二 曲面係為具有一凹部之曲面。 本發明更揭示了 _L述反射板的製作方法，該製作步驟 係首先，於反射面上定義正交之-橫軸以及一縱轴。 其次’進行-第-模擬程序，係先依據與縱軸平行之 複數條第-分隔線’將反射面區分為複數個橫軸分區，每 該橫軸分區接收総之光線大體上鱗；再侧地調整每 該橫軸分區之-橫軸傾角’使每雜轴分區之絲反射至 反射板上方之-擴散片之出光量大體上鱗，並且反射面 依橫軸剖面係呈連續的複數個斜面。 P逍後’進行-第二模擬程序，係先依據與橫轴平行之 複數條第二分隔線，將反射面區分為複數個縱軸分區，每 該縱軸分區接收該光源之光線大體上相等；再個別地調整 每該縱軸分區之-縱軸傾角’使每該縱軸分區之 至反射板上方之-擴散>;之出光量大體上鱗，並且該反 射面依該縱軸剖面係呈連續的複數個斜面。 最後’依據第-模擬程序所得之該些橫轴分區的橫轴 傾角’與第二模擬程序所求得之該些縱軸分區的縱轴傾 角’以實際形成三維（3-D)之反射面。 藉由本發賴揭示之製作轉所製狀反射板，係依 ，相異，源之光學特性（㈣光線之強度、角度），經精密 換擬計算，將反射面分割紐數個斜面，使光源之光線經 該些斜面反射至擴散片之亮度係均勻分布。如此一來，本 發明所揭示之背光模組雖係側光源型係不具有導光板，卻 具有光線均勻分布且光線亮度不為導光板所消耗等優異的 光學特性，且因省去導光板的使用而大幅地減低了重量， 實為一精良之創新發明。 關於本發明所述之背光模組，可以藉由以下發明詳述 及所附圖示，得到進一步的瞭解。 【實施方式】 首先’請參閱圖三’該圖係為本發明背光模組立體爆 炸圖。如圖三所示，一背光模組40係包括一殼體42、一 光源46以及一反射板44。殼體42包含一基板421以及一 側壁423，側壁423係鄰接於基板421 ;光源46設置於殼 體42内部且接近於側壁423 ;反射板44設置於基板421 上’並具有一反射面441，反射面441依與側壁423大體 上垂直之一橫轴X剖視呈一第一曲面，第一曲面由連續的 複數個斜面所構成；反射面441更依一縱軸γ剖視呈一第 二曲面，第二曲面由連續的複數個斜面所構成，其中縱軸 γ係正交於橫軸X。 背光模組40更包括一擴散片48,擴散片48係覆於殼 體42之上方’用以接收由反射面441反射之光線，使光線 穿透射入顯示面板（圖中未示）。在本發明一實施例中，擴 1334950 散片48的表面上係設有特定圖樣之網點，用以進一步提开 顯示面板之光線亮度與均勻性。The advantage of the board 14) is that the optical efficiency of the backlight module 20 is improved by reducing the media interface, that is, for the backlight module 10 having the light guide plate 14, the light generated by the light source 16 must have Part of the light guide plate 14 β is consumed; and the backlight module 20 does not have this disadvantage. Another advantage is that the use of the light guide plate 14 is reduced to help reduce the weight of the product. However, since the light source 26 of the backlight module 20 is still disposed at the position of the side wall 223 of the = side, the light is uniformly reflected to the display: too important issues of this technical field in fV County. Moreover, in the trend of more and more, the product uses the light dipole as the light source (Fig. 16 and Fig. 2 = 26), in view of the brightness of the light provided by the LED or the knife cloth It differs depending on the angle, so it is not uniform, but presents a three-dimensional (10)) distribution. In this case, the issue of how to make the light evenly reflected to the panel is more prominent. SUMMARY OF THE INVENTION An object of the present invention is to provide a backlight module that can uniformly reflect light to a display panel. Another object of the present invention is to provide a method of fabricating a reflecting plate which can produce a reflecting plate which uniformly reflects light from a light source to a display panel. The present invention discloses a backlight module including a housing, a light source, and a reflector. The housing comprises a substrate and a side wall, the side wall is adjacent to the substrate; the light source is disposed inside the housing and close to the side wall; the reflective plate is disposed on the substrate and has a reflective surface, and the reflective surface is substantially perpendicular to the sidewall The X-axis is in the form of a first curved surface, and the first curved surface is formed by a continuous plurality of inclined surfaces; the reflective surface is further divided into a second curved surface according to a longitudinal axis (Y_axis), and the second curved surface is continuous A plurality of slopes are formed, wherein the vertical axis is orthogonal to the horizontal axis. The reflecting surface is divided into a plurality of X-axis partitions by a plurality of first dividing lines, the first dividing lines are parallel to the vertical axis, and the light rays of the received light source of each horizontal axis partition are substantially Equally equal; the reflective surface is further divided into a plurality of vertical axis partitions (Y_axis partitions) by a plurality of second dividing lines, the second dividing lines are parallel to the horizontal axis, and each longitudinal axis partitions the light source of the received light source Generally equal. The first dividing line and the second dividing line further divide the reflecting surface into a plurality of reflecting blocks, wherein the reflecting blocks are inclined surfaces and respectively have a loose axis inclination angle and a miscellaneous inclination angle by the horizontal The angles of the axes (four) are different to form a first-surface 'X, and the angles of the inclinations of the longitudinal axes are different to constitute a second curved surface. In a preferred embodiment, the first curved surface includes two concave portions and a convex portion, and the convex portion is interposed between the two concave portions; the second curved surface is a curved surface having a concave portion. The present invention further discloses a method of fabricating a reflector, which first defines an orthogonal-horizontal axis and a vertical axis on the reflective surface. Secondly, the 'execution-first-simulation program first divides the reflection surface into a plurality of horizontal axis partitions according to a plurality of first-divided lines parallel to the vertical axis, and each of the horizontal axis partitions receives the light of the pupils substantially scaled; Adjusting the horizontal axis angle of each of the horizontal axis partitions so that the filaments of each of the miscellaneous axis segments are reflected above the reflecting plate, and the amount of light emitted by the diffusing sheet is substantially scaled, and the reflecting surface is continuous with a plurality of inclined planes according to the horizontal axis profile. . After P逍, the second simulation program first divides the reflection surface into a plurality of vertical axis partitions according to a plurality of second separation lines parallel to the horizontal axis, and each of the vertical axis partitions receives the light of the light source substantially equal. And adjusting the vertical axis inclination of each of the vertical axis partitions so that the amount of light emitted from each of the vertical axes to the top of the reflecting plate is substantially scaled, and the reflecting surface is according to the longitudinal axis A continuous number of slopes. Finally, 'the horizontal axis inclination angle of the horizontal axis partitions obtained by the first-simulation program and the vertical axis inclination angles of the vertical axis partitions obtained by the second simulation program' to actually form a three-dimensional (3-D) reflection surface . According to the production of the reflectors disclosed in this publication, the optical characteristics of the source (different, the intensity and angle of the light) are divided by the precision conversion calculation, and the reflecting surface is divided into a plurality of slopes to make the light source The light reflected by the slopes is uniformly distributed to the brightness of the diffusion sheet. In this way, the backlight module disclosed in the present invention does not have a light guide plate, but has excellent optical characteristics such as uniform light distribution and light brightness is not consumed by the light guide plate, and the light guide plate is omitted. The use of the drastically reduced weight is a sophisticated innovation. The backlight module of the present invention can be further understood by the following detailed description of the invention and the accompanying drawings. [Embodiment] First, please refer to FIG. 3, which is a perspective exploded view of a backlight module of the present invention. As shown in FIG. 3, a backlight module 40 includes a housing 42, a light source 46, and a reflector 44. The housing 42 includes a substrate 421 and a sidewall 423. The sidewall 423 is adjacent to the substrate 421. The light source 46 is disposed inside the housing 42 and adjacent to the sidewall 423. The reflector 44 is disposed on the substrate 421 and has a reflective surface 441. The reflecting surface 441 is formed in a first curved surface according to a transverse axis X substantially perpendicular to the side wall 423. The first curved surface is formed by a continuous plurality of inclined surfaces; the reflecting surface 441 is further formed according to a longitudinal axis γ. The curved surface, the second curved surface is composed of a continuous plurality of inclined faces, wherein the vertical axis γ is orthogonal to the horizontal axis X. The backlight module 40 further includes a diffusion sheet 48 that is disposed above the housing 42 for receiving light reflected by the reflective surface 441 to transmit light into the display panel (not shown). In an embodiment of the invention, the surface of the expanded 1334950 patch 48 is provided with a dot of a particular pattern to further enhance the brightness and uniformity of the light of the display panel.
光源46可為一發光二極體（LED)。發光二極體的優 點包括可提高色彩飽和度、真實度，提升觀看者的視覺感 受’且在電性上具有低耗電能的優勢。因此在發光二極體 的發光效率日漸提高之今日，光源46通常以發光二極體取 代冷陰極燈管。然而，發光二極體係具有一通常稱為可視 角（view angle)之光學特性，亦即，光線強度隨視角改變， 因此’發光二極體亦被指為一種具有“高指向性，，之發光元 件。請參照圖四所示’圖四顯示一發光二極體之發光角度-發光強度關係圖’如圖四所示，發光二極體在一斷面上， 其主發光強度通常是在90度的方向上，而向二侧之〇度或 180度皆是發光強度逐漸衰減的情形。 如前所述，本發明之反射板44具有反射面44卜反射 面441依與側壁423大體上垂直之一橫軸χ剖視呈一第一 曲面，反射面441更依一縱軸Y剖視呈一第二曲面。換句 話說’本發明所提供之反射板441在橫軸χ與縱軸γ此二 方向上皆具有特定的光學設計，第一曲面與第二曲面皆是 為了使得光源46之光線能夠更加均勻地提供給顯示面 板。但值得-提的是’雖然本發明應祕具有高指向性的 光源46時’特顯其效果；然而，&並非用以做為本發明之 Ρ艮制’本發财可_較不具指向性的發光元件，例如△ 陰極燈管（CCFL) ’來作為光源46的實施方式。 7 請參閱圖五A，圖五A係為本發明一實施例反射面上 視圖。反射面441被複數條第一分隔線51區分為複數個橫Light source 46 can be a light emitting diode (LED). The advantages of the light-emitting diode include the advantages of improved color saturation, realism, and improved viewer's visual perception and electrical low power consumption. Therefore, in the day when the luminous efficiency of the light-emitting diode is increasing day by day, the light source 46 usually replaces the cold cathode lamp with a light-emitting diode. However, the light-emitting diode system has an optical characteristic generally called a view angle, that is, the light intensity changes with the viewing angle, so the 'light-emitting diode is also referred to as a kind of "high directivity," Please refer to Figure 4, which shows the relationship between the luminous angle of a light-emitting diode and the luminous intensity. As shown in Figure 4, the main light intensity of the light-emitting diode is usually 90. In the direction of the degree, the twist to the two sides or 180 degrees is the case where the luminous intensity is gradually attenuated. As described above, the reflecting plate 44 of the present invention has the reflecting surface 44, and the reflecting surface 441 is substantially perpendicular to the side wall 423. One of the horizontal axes is a first curved surface, and the reflecting surface 441 is a second curved surface according to a longitudinal axis Y. In other words, the reflecting plate 441 provided by the present invention has a horizontal axis χ and a vertical axis γ. Both of the two directions have a specific optical design, and both the first curved surface and the second curved surface are used to make the light of the light source 46 more uniformly provided to the display panel. However, it is worth mentioning that although the present invention has a high pointing point Sexual light source 46 when 'special The effect is; however, & is not intended to be an embodiment of the present invention, which is a light-emitting element that is less directional, such as a △ cathode lamp tube (CCFL). Referring to FIG. 5A, FIG. 5A is a view of a reflecting surface according to an embodiment of the present invention. The reflecting surface 441 is divided into a plurality of horizontal lines by a plurality of first dividing lines 51.
10 轴分區（X-axispartiti〇n) 55，笼 轴γ作其中，該等第一二==與縱 非以等距離的方式設置之。本發明:: 用第一她程序以測得該等第一分隔線51之 ，’其原則與目的係在於：使得每—橫轴分區55所 自光源奶的光線大體上能夠相等。關於上述第一模 將坪述於後續之本發明製作方法相關段落中。、序 又，反射面441被複數條第二分隔線5 縱軸分區（Y-axis _&η) 56，為複數個 &轴X付。且該等第—分隔線52之 ‘ 目的係在於··使每—縱轴分置的原則與 大體上相“：心 接收光源46之光線係 於^相4。此其中係利用了—第二模擬程序亦將詳述 如圖五A所示，該等第—分隔線51以及該等第二八 隔線52更將反射面州分袼為複數個反射區塊β。刀 請參閱圖五B、圖五C’圖五B係為圖五八反射面延 b-b剖面線剖視圖，圖五c係為 線剖棚。 加五A反射崎e_c剖面 =刺反魄塊45齡媽斜面（可參相三之立體 T ’以XY平面為〇度，在橫軸χ與縱軸γ分別 4視時，個別的反射區塊45係具有—橫軸傾角θγ(如圖 五Β所不）以及一縱軸傾角〜(如圖五c所示)。 如圖iB所不’反射面441藉由該等橫軸傾角知的角 度不同，以構成第一曲面，又，如圖五C所示，反射面441The 10-axis partition (X-axis partiti〇n) 55, the cage axis γ is in which the first two == and the vertical are not equidistantly set. The present invention: uses the first program to measure the first dividing lines 51, the principle and purpose of which is such that the light from the source milk is substantially equal to each of the horizontal axis partitions 55. The first mode described above will be described in the subsequent paragraphs of the manufacturing method of the present invention. Further, the reflecting surface 441 is divided by a plurality of second dividing lines 5 on the vertical axis (Y-axis _& η) 56, and is a plurality of & axes X. And the purpose of the first-separation line 52 is to make the principle of separating each vertical axis substantially the same as "the light of the heart receiving light source 46 is tied to the phase 4. This is utilized - the second The simulation program will also be detailed as shown in FIG. 5A. The first dividing line 51 and the second eight dividing lines 52 further divide the reflecting surface into a plurality of reflecting blocks β. See Figure 5B for the knife. Figure 5C' Figure 5B is a cross-sectional view of the bb section of Figure VIII. Figure 5c is the line shed. Add 5A reflection saki e_c profile = thorny 魄 block 45-year-old mother slope (can participate in phase The three-dimensional T' is in the XY plane, and when the horizontal axis χ and the vertical axis γ are respectively 4, the individual reflection blocks 45 have a horizontal axis inclination angle θγ (as shown in Fig. 5) and a vertical axis. Inclination angle ~ (as shown in Fig. 5c). As shown in Fig. iB, the reflection surface 441 is different in angle by the inclination angle of the horizontal axis to constitute the first curved surface, and, as shown in Fig. 5C, the reflection surface 441