TWI805417B

TWI805417B - Illuminatiion system and projeciton device

Info

Publication number: TWI805417B
Application number: TW111123348A
Authority: TW
Inventors: 林孟萱; 陳彥霖
Original assignee: 中強光電股份有限公司
Priority date: 2022-04-06
Filing date: 2022-06-23
Publication date: 2023-06-11
Also published as: CN116931358A; TW202340644A

Abstract

An illumination system including a light source module, a first lens array, a condensing element, a second lens array and a prism element is provided. The light source module is adapted to providing an illumination beam. The first lens array is arranged on the transmission path of the illumination beam. The condensing element is arranged on the transmission path of the illumination beam. The first lens array is located between the light source module and the condensing element. The second lens array is arranged on the transmission path of the illumination beam. The prism element is arranged on the transmission path of the illumination beam. The second lens array is located between the condensing element and the prism element, wherein the area of the second lens array is larger than the area of the first lens array.

Description

照明系統以及投影裝置Lighting system and projection device

本發明是有關於一種光學系統以及顯示裝置，且特別是有關於一種照明系統以及具有所述照明系統的投影裝置。The present invention relates to an optical system and a display device, and in particular to an illumination system and a projection device with the illumination system.

投影裝置為一種用於產生大面積畫面的顯示裝置，隨著科技技術的演進與創新，一直不斷的在進步。投影裝置的成像原理是將照明系統所產生的照明光束藉由光閥轉換成影像光束，再將影像光束通過投影鏡頭投射到投射目標物（例如：螢幕或牆面上），以形成投影畫面。The projection device is a display device used to generate a large-area image, and has been continuously improving with the evolution and innovation of technology. The imaging principle of the projection device is to convert the illumination beam generated by the lighting system into an image beam through the light valve, and then project the image beam to the projection target (such as a screen or wall) through the projection lens to form a projection image.

為了追求更小體積的投影裝置應用在微型投影裝置上，可以使用在頭戴顯示器上，微型投影裝置的照明系統從早期的R / G / B三個通道(Red/Green/Blue LED light beams forming three pathways)，逐漸演變至目前的RB / G二個通道(Red and Blue/Green LED light beams forming two pathways)，或是RGB一個通道(Red and Blue and Green LED light beams forming one pathway)。上述三種架構，都是利用準直透鏡將發光二極體所提供光源平行入射至透鏡陣列，再經由聚光透鏡將透鏡陣列上的光束聚焦在光閥的成像元件上。不過，為了達到最小體積的設計，會使用最少的光源來做設計。然而，因為部分色光光源為各一顆光源，且位置互為對角線，所以投影出來的畫面會有很明顯的顏色不均勻的問題。In order to pursue a smaller projection device and apply it to a micro projection device, it can be used on a head-mounted display. The lighting system of the micro projection device has changed from the early R / G / B three channels (Red/Green/Blue LED light beams forming three pathways), and gradually evolved to the current RB / G two channels (Red and Blue/Green LED light beams forming two pathways), or RGB one channel (Red and Blue and Green LED light beams forming one pathway). The above-mentioned three structures all use collimating lens to make the light source provided by light-emitting diodes incident to the lens array in parallel, and then focus the light beam on the lens array on the imaging element of the light valve through the condenser lens. However, in order to achieve the smallest volume design, the least number of light sources will be used for the design. However, because part of the color light sources are one light source each, and the positions are diagonal to each other, the projected picture will have obvious color unevenness.

“先前技術”段落只是用來幫助了解本發明內容，因此在“先前技術”段落所揭露的內容可能包含一些沒有構成所屬技術領域中具有通常知識者所知道的習知技術。在“先前技術”段落所揭露的內容，不代表該內容或者本發明一個或多個實施例所要解決的問題，在本發明申請前已被所屬技術領域中具有通常知識者所知曉或認知。The "Prior Art" paragraph is only used to help understand the content of the present invention, so the content disclosed in the "Prior Art" paragraph may contain some conventional technologies that do not constitute the knowledge of those with ordinary skill in the art. The content disclosed in the "Prior Art" paragraph does not mean that the content or the problems to be solved by one or more embodiments of the present invention have been known or recognized by those with ordinary knowledge in the technical field before the application of the present invention.

本發明提供一種照明系統以及投影裝置，可提升照明光束的均勻度以及不同顏色的均勻度。The invention provides an illumination system and a projection device, which can improve the uniformity of the illumination beam and the uniformity of different colors.

本發明的其他目的和優點可以從本發明所揭露的技術特徵中得到進一步的了解。Other purposes and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

為達上述之一或部份或全部目的或是其他目的，本發明提供一種照明系統，包括光源模組、第一透鏡陣列、聚光元件、第二透鏡陣列以及稜鏡元件。光源模組用於提供照明光束。第一透鏡陣列配置於照明光束的傳遞路徑上。聚光元件配置於照明光束的傳遞路徑上。第一透鏡陣列位於光源模組與聚光元件之間。第二透鏡陣列，配置於照明光束的傳遞路徑上。稜鏡元件配置於照明光束的傳遞路徑上。第二透鏡陣列位於聚光元件與稜鏡元件之間，其中第二透鏡陣列的表面面積大於第一透鏡陣列的表面面積。In order to achieve one or part or all of the above objectives or other objectives, the present invention provides an illumination system, including a light source module, a first lens array, a light concentrating element, a second lens array, and an optical element. The light source module is used for providing illumination beams. The first lens array is arranged on the transmission path of the illumination light beam. The light collecting element is arranged on the transmission path of the illumination beam. The first lens array is located between the light source module and the light concentrating element. The second lens array is arranged on the transmission path of the illumination light beam. The 稜鏡 element is arranged on the transmission path of the illumination light beam. The second lens array is located between the light concentrating element and the narrowing element, wherein the surface area of the second lens array is greater than that of the first lens array.

在一實施例中，第二透鏡陣列包括多個微透鏡，且位於第二透鏡陣列的相對兩面。In one embodiment, the second lens array includes a plurality of micro-lenses located on opposite sides of the second lens array.

在一實施例中，第二透鏡陣列包括多個微透鏡，且多個微透鏡呈六角排列、矩形排列或螺旋排列。In one embodiment, the second lens array includes a plurality of microlenses, and the plurality of microlenses are arranged in a hexagonal arrangement, a rectangular arrangement or a helical arrangement.

在一實施例中，第二透鏡陣列的延伸方向與稜鏡元件的出光面的延伸方向具有夾角。In one embodiment, the extension direction of the second lens array has an included angle with the extension direction of the light-emitting surface of the micron element.

在一實施例中，光源模組包括發光元件以及準直透鏡組，其中發光元件提供紅光、綠光以及藍光。In one embodiment, the light source module includes a light emitting element and a collimating lens group, wherein the light emitting element provides red light, green light and blue light.

在一實施例中，發光元件為紅色、綠色、綠色及藍色發光二極體排列而成。In one embodiment, the light emitting element is arranged by red, green, green and blue light emitting diodes.

在一實施例中，準直透鏡組包括至少一光學透鏡。In one embodiment, the collimating lens group includes at least one optical lens.

在一實施例中，準直透鏡組包括複合拋物面聚光器。In one embodiment, the collimating lens set includes a compound parabolic concentrator.

在一實施例中，第一透鏡陣列直接地連接複合拋物面聚光器。In one embodiment, the first lens array is directly connected to the compound parabolic concentrator.

在一實施例中，聚光元件具有反射面，用於反射照明光束以傳遞至第二透鏡陣列。In one embodiment, the light concentrating element has a reflective surface for reflecting the illuminating light beam to pass to the second lens array.

為達上述之一或部份或全部目的或是其他目的，本發明另提供一種投影裝置，包括照明系統、光閥以及投影鏡頭。照明系統用於提供照明光束。照明系統包括光源模組、第一透鏡陣列、聚光元件、第二透鏡陣列以及稜鏡元件。光源模組用於提供照明光束。第一透鏡陣列配置於照明光束的傳遞路徑上。聚光元件配置於照明光束的傳遞路徑上。第一透鏡陣列位於光源模組與聚光元件之間。第二透鏡陣列，配置於照明光束的傳遞路徑上。稜鏡元件配置於照明光束的傳遞路徑上。第二透鏡陣列位於聚光元件與稜鏡元件之間。光閥配置於照明光束的傳遞路徑上，用於將照明光束轉換為影像光束。投影鏡頭配置於影像光束的傳遞路徑上，用於將影像光束投射出投影裝置，其中第二透鏡陣列的表面面積大於第一透鏡陣列的表面面積。To achieve one or part or all of the above objectives or other objectives, the present invention further provides a projection device, including an illumination system, a light valve, and a projection lens. The lighting system is used to provide the lighting beam. The lighting system includes a light source module, a first lens array, a light-condensing element, a second lens array, and a lens element. The light source module is used for providing illumination beams. The first lens array is arranged on the transmission path of the illumination light beam. The light collecting element is arranged on the transmission path of the illumination beam. The first lens array is located between the light source module and the light concentrating element. The second lens array is arranged on the transmission path of the illumination light beam. The 稜鏡 element is arranged on the transmission path of the illumination light beam. The second lens array is located between the light concentrating element and the narrowing element. The light valve is arranged on the transmission path of the illuminating light beam, and is used for converting the illuminating light beam into an image light beam. The projection lens is arranged on the transmission path of the image beam for projecting the image beam out of the projection device, wherein the surface area of the second lens array is larger than that of the first lens array.

基於上述，本發明的實施例至少具有以下其中一個優點或功效。在本發明的照明系統以及投影裝置中，照明系統包括光源模組、第一透鏡陣列、聚光元件、第二透鏡陣列以及稜鏡元件。其中第一透鏡陣列配置於光源模組與聚光元件之間，用於控制光源模組所提供照明光束的光束截面積尺寸以匹配接收照明光束的光閥的表面尺寸(表面面積)，第二透鏡陣列配置於聚光元件與稜鏡元件之間，用於改變照明光束中各色的光型並使其均勻化。如此一來，可提升照明光束的均勻度以及不同顏色的均勻度，以避免人眼可看出發光元件所發出的色光具有不均勻的現象。Based on the above, the embodiments of the present invention have at least one of the following advantages or functions. In the lighting system and the projection device of the present invention, the lighting system includes a light source module, a first lens array, a light concentrating element, a second lens array, and a lens element. Wherein the first lens array is arranged between the light source module and the condensing element, and is used to control the beam sectional area size of the illumination beam provided by the light source module to match the surface size (surface area) of the light valve receiving the illumination beam, and the second The lens array is arranged between the light-condensing element and the light-emitting element, and is used for changing and uniformizing the light pattern of each color in the illumination beam. In this way, the uniformity of the illumination beam and the uniformity of different colors can be improved, so as to avoid the phenomenon that the color light emitted by the light-emitting element is not uniform.

為讓本發明的上述特徵和優點能更明顯易懂，下文特舉實施例，並配合所附圖式作詳細說明如下。In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

有關本發明之前述及其他技術內容、特點與功效，在以下配合參考圖式之一較佳實施例的詳細說明中，將可清楚的呈現。以下實施例中所提到的方向用語，例如：上、下、左、右、前或後等，僅是參考附加圖式的方向。因此，使用的方向用語是用來說明並非用來限制本發明。The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only directions referring to the attached drawings. Accordingly, the directional terms used are for the purpose of illustration and not for the purpose of limiting the invention.

圖1為本發明一實施例的投影裝置的示意圖。請參考圖1。在一實施例中，投影裝置10可應用於頭戴顯示器。本實施例提供一種投影裝置10包括照明系統100、光閥60以及投影鏡頭70。其中，照明系統100用於提供一照明光束LB。光閥60配置於照明光束LB的傳遞路徑上，用於轉換照明光束LB為影像光束LI。投影鏡頭70配置於影像光束LI的傳遞路徑上，且用於將影像光束LI投射出投影裝置10至投影目標（未顯示），例如螢幕、牆面或頭戴式裝置的波導元件。FIG. 1 is a schematic diagram of a projection device according to an embodiment of the present invention. Please refer to Figure 1. In one embodiment, the projection device 10 can be applied to a head-mounted display. This embodiment provides a projection device 10 including an illumination system 100 , a light valve 60 and a projection lens 70 . Wherein, the illumination system 100 is used for providing an illumination beam LB. The light valve 60 is disposed on the transmission path of the illumination beam LB for converting the illumination beam LB into the image beam LI. The projection lens 70 is disposed on the transmission path of the image beam LI, and is used to project the image beam LI out of the projection device 10 to a projection target (not shown), such as a screen, a wall or a waveguide element of a head-mounted device.

在本實施例中，光閥60例如是液晶覆矽板（Liquid Crystal On Silicon panel，LCoS panel）、數字微鏡元件（Digital Micro-mirror Device，DMD）等反射式光調變器。本發明對光閥60的型態及其種類並不加以限制。光閥60將來自照明系統100的照明光束LB轉換為影像光束LI的方法，其詳細步驟及實施方式可以由所屬技術領域的通常知識獲致足夠的教示、建議與實施說明，因此不再贅述。在本實施例中，光閥60的數量為一個，例如是使用單個數字微鏡元件的投影裝置10。光閥60也可使用液晶覆矽板。在本實施例中，投影裝置10還包括保護蓋80（見如圖2），用於避免光閥60接觸灰塵而影響光學效果。保護蓋80的材質例如是玻璃或塑膠。In this embodiment, the light valve 60 is, for example, a reflective light modulator such as a Liquid Crystal On Silicon panel (LCoS panel) or a digital micromirror device (Digital Micro-mirror Device, DMD). The present invention does not limit the type and type of the light valve 60 . The detailed steps and implementation of the method for the light valve 60 to convert the illumination beam LB from the illumination system 100 into the image beam LI can be obtained from the general knowledge in the technical field for sufficient teaching, suggestion and implementation description, and thus will not be repeated here. In this embodiment, the number of the light valve 60 is one, for example, the projection device 10 using a single DMD. The light valve 60 can also use a liquid crystal silicon on board. In this embodiment, the projection device 10 further includes a protective cover 80 (see FIG. 2 ), which is used to prevent the light valve 60 from contacting dust and affecting the optical effect. The material of the protective cover 80 is, for example, glass or plastic.

投影鏡頭70例如包括具有屈光度的一或多個光學鏡片的組合，例如包括雙凹透鏡、雙凸透鏡、凹凸透鏡、凸凹透鏡、平凸透鏡以及平凹透鏡等非平面鏡片的各種組合。於一實施例中，投影鏡頭70還可以包括平面光學鏡片，以反射方式將來自光閥60的影像光束LI投射至投影目標。本發明對投影鏡頭70的型態及其種類並不加以限制。The projection lens 70 includes, for example, a combination of one or more optical lenses with diopters, such as various combinations of non-planar lenses such as biconcave lenses, biconvex lenses, concave-convex lenses, convex-concave lenses, plano-convex lenses, and plano-concave lenses. In an embodiment, the projection lens 70 may also include a flat optical lens to project the image light beam LI from the light valve 60 to the projection target in a reflective manner. The present invention does not limit the type and type of the projection lens 70 .

圖2為本發明一實施例的照明系統的示意圖。圖3為本發明一實施例的光源模組的示意圖。請參考圖2及圖3。本實施例的照明系統100至少可應用於圖1所顯示的投影裝置10中，故以下說明以此為例。在本實施例中，照明系統100包括光源模組110、第一透鏡陣列120、聚光元件130、第二透鏡陣列140以及稜鏡元件150。光源模組110用於提供照明光束LB。在本實施例中，光源模組110包括發光元件112以及準直透鏡組114，其中發光元件112例如是整合型發光二極體，提供紅光、綠光以及藍光。具體而言，發光元件112為紅色、綠色、綠色及藍色發光二極體排列而成，且紅色與藍色發光二極體互為對角線，兩綠色發光二極體互為對角線，如圖3所顯示。因此，可使其實現最小體積的設計，但本發明並不限於此。在本實施例中，準直透鏡組114包括至少一光學透鏡，準直透鏡組114用於提供平行的照明光束LB到第一透鏡陣列120，本發明亦不限於此。FIG. 2 is a schematic diagram of an illumination system according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a light source module according to an embodiment of the present invention. Please refer to Figure 2 and Figure 3. The lighting system 100 of this embodiment can be applied to at least the projection device 10 shown in FIG. 1 , so the following description takes this as an example. In this embodiment, the lighting system 100 includes a light source module 110 , a first lens array 120 , a light concentrating element 130 , a second lens array 140 , and a lens element 150 . The light source module 110 is used for providing an illumination beam LB. In this embodiment, the light source module 110 includes a light emitting element 112 and a collimating lens group 114 , wherein the light emitting element 112 is, for example, an integrated light emitting diode, which provides red light, green light and blue light. Specifically, the light-emitting element 112 is arranged by red, green, green and blue light-emitting diodes, and the red and blue light-emitting diodes are diagonal to each other, and the two green light-emitting diodes are diagonal to each other. , as shown in Figure 3. Therefore, it is possible to achieve a minimum volume design, but the present invention is not limited thereto. In this embodiment, the collimating lens group 114 includes at least one optical lens, and the collimating lens group 114 is used to provide parallel illumination beams LB to the first lens array 120 , and the invention is not limited thereto.

第一透鏡陣列120配置於照明光束LB的傳遞路徑上，用於控制光源模組110所提供的照明光束LB的光束截面積尺寸以匹配接收照明光束LB的光閥60的表面尺寸(表面面積)。舉例而言，穿過第一透鏡陣列120的照明光束LB的光束截面積尺寸等於或近似接收照明光束LB的光閥60的表面尺寸。The first lens array 120 is arranged on the transmission path of the illumination beam LB, and is used to control the beam cross-sectional area size of the illumination beam LB provided by the light source module 110 to match the surface size (surface area) of the light valve 60 receiving the illumination beam LB. . For example, the beam cross-sectional size of the illumination beam LB passing through the first lens array 120 is equal to or approximate to the surface size of the light valve 60 receiving the illumination beam LB.

第一透鏡陣列120包括多個微透鏡，可位於第一透鏡陣列120的單面上或位於第一透鏡陣列120的相對兩面上，本發明並不限於此。The first lens array 120 includes a plurality of microlenses, which may be located on a single surface of the first lens array 120 or on two opposite surfaces of the first lens array 120 , the present invention is not limited thereto.

聚光元件130配置於照明光束LB的傳遞路徑上，且第一透鏡陣列120位於光源模組110與聚光元件130之間。在本實施例中，聚光元件130具有反射面132，例如鍍上一層反射膜，用於反射照明光束LB以傳遞至第二透鏡陣列140。The light concentrating element 130 is disposed on the transmission path of the illumination beam LB, and the first lens array 120 is located between the light source module 110 and the light concentrating element 130 . In this embodiment, the light concentrating element 130 has a reflective surface 132 , for example coated with a reflective film, for reflecting the illumination light beam LB to transmit to the second lens array 140 .

第二透鏡陣列140配置於照明光束LB的傳遞路徑上，用於改變照明光束LB中各色(紅色、綠色及藍色)的光型並使其均勻化，進而提升照明光束LB的均勻度以及不同顏色的均勻度，以避免人眼可看出發光元件112所發出的色光具有不均勻的現象。第二透鏡陣列140包括多個微透鏡，位於第二透鏡陣列140的相對兩面上。在本實施例中，在物理上，第二透鏡陣列140的表面面積大於第一透鏡陣列120的表面面積。此外，第二透鏡陣列140的入光面接收到照明光束LB的光束面積也會大於第一透鏡陣列120的入光面接收到照明光束LB的光束面積。The second lens array 140 is arranged on the transmission path of the illumination beam LB, and is used to change the light pattern of each color (red, green, and blue) in the illumination beam LB and make it uniform, thereby improving the uniformity and the difference of the illumination beam LB. The uniformity of the color can avoid the phenomenon that the color light emitted by the light emitting element 112 is not uniform. The second lens array 140 includes a plurality of micro lenses located on two opposite surfaces of the second lens array 140 . In this embodiment, physically, the surface area of the second lens array 140 is larger than that of the first lens array 120 . In addition, the beam area of the light incident surface of the second lens array 140 receiving the illumination beam LB is larger than the beam area of the light incident surface of the first lens array 120 receiving the illumination beam LB.

圖4A至圖4C分別為不同實施例的部份透鏡陣列的示意圖。請參考圖2、圖4A至圖4C。在不同的實施例中，第一透鏡陣列120與第二透鏡陣列140的微透鏡M可因應不同的情境而有不同的排列設計。舉例而言，如圖4A所顯示，第一透鏡陣列120與第二透鏡陣列140的微透鏡M可為六角排列（或稱圓形排列）。或者，如圖4B所顯示，第一透鏡陣列120與第二透鏡陣列140的微透鏡M1可為矩形排列。又或者，如圖4C所顯示，第一透鏡陣列120與第二透鏡陣列140的微透鏡M2可為螺旋排列（為方便顯示，圖4C僅顯示排列位置），但本發明並不限於此。4A to 4C are schematic diagrams of partial lens arrays in different embodiments. Please refer to FIG. 2, FIG. 4A to FIG. 4C. In different embodiments, the micro-lenses M of the first lens array 120 and the second lens array 140 may have different arrangement designs according to different situations. For example, as shown in FIG. 4A , the microlenses M of the first lens array 120 and the second lens array 140 may be arranged in a hexagonal manner (or called a circular arrangement). Alternatively, as shown in FIG. 4B , the microlenses M1 of the first lens array 120 and the second lens array 140 may be arranged in a rectangle. Alternatively, as shown in FIG. 4C , the microlenses M2 of the first lens array 120 and the second lens array 140 may be arranged in a spiral (for convenience, FIG. 4C only shows the arrangement positions), but the present invention is not limited thereto.

圖5為圖2的照明系統的部份放大示意圖。請參考圖2及圖5。稜鏡元件150配置於照明光束LB的傳遞路徑上，且第二透鏡陣列140位於聚光元件130與稜鏡元件150之間。稜鏡元件150例如是全內反射式稜鏡（TIR prism），用以引導照明光束LB傳遞至光閥60以及引導影像光束LI至投影鏡頭70（如圖1）。進一步說明，稜鏡元件150具有第一表面與出光面，稜鏡元件150的第一表面面對第二透鏡陣列140，稜鏡元件150的出光面面對光閥60。稜鏡元件150的第一表面，用於接收照明光束LB，照明光束LB進入稜鏡元件150而傳遞至光閥60。當光閥60將照明光束LB轉換為影像光束LI，影像光束LI再次進入稜鏡元件150，並影像光束LI藉由稜鏡元件150的第一表面反射而離開稜鏡元件150且傳遞至投影鏡頭70。FIG. 5 is a partially enlarged schematic view of the lighting system in FIG. 2 . Please refer to Figure 2 and Figure 5. The light-emitting element 150 is disposed on the transmission path of the illumination beam LB, and the second lens array 140 is located between the light-condensing element 130 and the light-emitting element 150 . The prism element 150 is, for example, a total internal reflection prism (TIR prism) for guiding the illumination beam LB to the light valve 60 and guiding the image beam LI to the projection lens 70 (as shown in FIG. 1 ). To further illustrate, the light-emitting element 150 has a first surface and a light-emitting surface, the first surface of the light-emitting element 150 faces the second lens array 140 , and the light-emitting surface of the light-emitting element 150 faces the light valve 60 . The first surface of the luminous element 150 is used for receiving the illumination beam LB, which enters the luminous element 150 and is transmitted to the light valve 60 . When the light valve 60 converts the illumination light beam LB into the image light beam LI, the image light beam LI enters the light beam element 150 again, and the image light beam LI is reflected by the first surface of the light beam element 150 to leave the light beam element 150 and pass to the projection lens 70.

此外，在本實施例中，第二透鏡陣列140的延伸方向(此延伸方向垂直於第二透鏡陣列140的表面的法線方向)與稜鏡元件150的出光面的延伸方向(此延伸方向垂直於光閥60的表面的法線方向)具有夾角A。稜鏡元件150的出光面平行於光閥60的表面。具體而言，照明系統100還可包括間隔件160，間隔件160與第二透鏡陣列140之間具有一距離。In addition, in this embodiment, the extension direction of the second lens array 140 (this extension direction is perpendicular to the normal direction of the surface of the second lens array 140) and the extension direction of the light-emitting surface of the galvanized element 150 (this extension direction is perpendicular to There is an included angle A in the normal direction of the surface of the light valve 60 ). The light emitting surface of the light emitting element 150 is parallel to the surface of the light valve 60 . Specifically, the lighting system 100 may further include a spacer 160 , and there is a distance between the spacer 160 and the second lens array 140 .

間隔件160設置於第二透鏡陣列140與稜鏡元件150之間，其目的是用於避免照明光束LB在此空氣層中產生光程差，進而造成投影畫面品質下降。值得一提的是，本實施例可依據光閥60的表面尺寸及其收光角度而決定出第二透鏡陣140的尺寸（即光學面積）。如此一來，可提高光的使用效率，如圖5所顯示，進而提升照明光束LB的均勻度。The spacer 160 is disposed between the second lens array 140 and the lens element 150 , and its purpose is to prevent the illuminating light beam LB from producing an optical path difference in the air layer, thereby degrading the quality of the projected image. It is worth mentioning that, in this embodiment, the size (ie, the optical area) of the second lens array 140 can be determined according to the surface size of the light valve 60 and its light-receiving angle. In this way, the use efficiency of light can be improved, as shown in FIG. 5 , thereby improving the uniformity of the illumination beam LB.

圖6為本發明另一實施例的照明系統的示意圖。請參考圖6。本實施例的照明系統100A類似於圖2所顯示的照明系統100。兩者不同之處在於，在本實施例中，光源模組110A的準直透鏡組114A包括複合拋物面聚光器（Compound Parabolic Concentrator, CPC），用於將發光元件112所發出不同角度的光透過複合拋物面聚光器的曲面變成平行光。此外，第一透鏡陣列120A直接地連接複合拋物面聚光器。因此，可進一步節省照明系統100A的體積，且具有良好的光學效果。在另一實施例中，亦可以將第一透鏡陣列120A直接地配置連接於聚光元件130的入光面。如此一來，可提升照明光束的均勻度以及不同顏色的均勻度，以避免人眼可看出發光元件112所發出的色光具有不均勻的現象。Fig. 6 is a schematic diagram of an illumination system according to another embodiment of the present invention. Please refer to Figure 6. The lighting system 100A of this embodiment is similar to the lighting system 100 shown in FIG. 2 . The difference between the two is that, in this embodiment, the collimating lens group 114A of the light source module 110A includes a compound parabolic concentrator (Compound Parabolic Concentrator, CPC), which is used to transmit the light emitted by the light emitting element 112 at different angles. The curved surface of the compound parabolic concentrator becomes parallel light. Furthermore, the first lens array 120A is directly connected to the compound parabolic concentrator. Therefore, the volume of the lighting system 100A can be further saved, and it has good optical effect. In another embodiment, the first lens array 120A may also be directly configured and connected to the light incident surface of the light concentrating element 130 . In this way, the uniformity of the illumination light beam and the uniformity of different colors can be improved, so as to avoid the phenomenon that the color light emitted by the light emitting element 112 is not uniform.

綜上所述，在本發明的照明系統以及投影裝置中，照明系統包括光源模組、第一透鏡陣列、聚光元件、第二透鏡陣列以及稜鏡元件。其中第一透鏡陣列配置於光源模組與聚光元件之間，用於控制光源模組所提供照明光束的光束截面積尺寸以匹配接收照明光束的光閥的表面面積尺寸，第二透鏡陣列配置於聚光元件與稜鏡元件之間，用於改變照明光束中各色的光型並均勻化，以及第二透鏡陣列的表面面積大於所述第一透鏡陣列的表面面積。如此一來，可提升照明光束的均勻度以及不同顏色的均勻度，以避免人眼可看出發光元件所發出的色光具有不均勻的現象。To sum up, in the lighting system and the projection device of the present invention, the lighting system includes a light source module, a first lens array, a light-condensing element, a second lens array, and a light-emitting element. Wherein the first lens array is arranged between the light source module and the condensing element, and is used to control the beam cross-sectional area size of the illumination beam provided by the light source module to match the surface area size of the light valve receiving the illumination beam, and the second lens array is configured Between the light-condensing element and the light-emitting element, it is used to change and uniformize the light pattern of each color in the illumination beam, and the surface area of the second lens array is larger than that of the first lens array. In this way, the uniformity of the illumination beam and the uniformity of different colors can be improved, so as to avoid the phenomenon that the color light emitted by the light-emitting element is not uniform.

惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及發明說明內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。另外本發明的任一實施例或申請專利範圍不須達成本發明所揭露之全部目的或優點或特點。此外，摘要部分和標題僅是用來輔助專利文件搜尋之用，並非用來限制本發明之權利範圍。此外，本說明書或申請專利範圍中提及的“第一”、“第二”等用語僅用於命名元件（element）的名稱或區別不同實施例或範圍，而並非用來限制元件數量上的上限或下限。But the above-mentioned ones are only preferred embodiments of the present invention, and the scope of implementation of the present invention cannot be limited with this, that is, all simple equivalent changes and modifications made according to the patent scope of the present invention and the contents of the description of the invention, All still belong to the scope covered by the patent of the present invention. In addition, any embodiment or scope of claims of the present invention does not need to achieve all the objectives or advantages or features disclosed in the present invention. In addition, the abstract and the title are only used to assist the search of patent documents, and are not used to limit the scope of rights of the present invention. In addition, terms such as "first" and "second" mentioned in this specification or the scope of the patent application are only used to name elements (elements) or to distinguish different embodiments or ranges, and are not used to limit the number of elements. upper or lower limit.

10:投影裝置 60:光閥 70:投影鏡頭 80:保護蓋 100,100A:照明系統 110,110A:光源模組 112:發光元件 114,114A:準直透鏡組 120,120A:第一透鏡陣列 130:聚光元件 132:反射面 140:第二透鏡陣列 150:稜鏡元件 160:間隔件 A:夾角 LB:照明光束 LI:影像光束 M,M1,M2:微透鏡。 10: Projection device 60: light valve 70:Projection lens 80: Protective cover 100,100A: lighting system 110,110A: light source module 112: Light emitting element 114, 114A: Collimating lens group 120, 120A: the first lens array 130: Concentrating element 132: reflective surface 140: the second lens array 150: 騜鏡 Components 160: spacer A: Angle LB: lighting beam LI: image beam M, M1, M2: microlenses.

圖1為本發明一實施例的投影裝置的示意圖。圖2為本發明一實施例的照明系統的示意圖。圖3為本發明一實施例的光源模組的示意圖。圖4A至圖4C分別為不同實施例的部份透鏡陣列的示意圖。圖5為圖2的照明系統的部份放大示意圖。圖6為本發明另一實施例的照明系統的示意圖。 FIG. 1 is a schematic diagram of a projection device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of an illumination system according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a light source module according to an embodiment of the present invention. 4A to 4C are schematic diagrams of partial lens arrays in different embodiments. FIG. 5 is a partially enlarged schematic view of the lighting system in FIG. 2 . Fig. 6 is a schematic diagram of an illumination system according to another embodiment of the present invention.

60:光閥 60: light valve

100:照明系統 100: Lighting system

110:光源模組 110:Light source module

112:發光元件 112: Light emitting element

114:準直透鏡組 114: Collimating lens group

120:第一透鏡陣列 120: the first lens array

130:聚光元件 130: Concentrating element

132:反射面 132: reflective surface

140:第二透鏡陣列 140: the second lens array

150:稜鏡元件 150: 騜鏡 Components

160:間隔件 160: spacer

A:夾角 A: Angle

LB:照明光束 LB: lighting beam

Claims

一種照明系統，包括：光源模組，用於提供照明光束；第一透鏡陣列，配置於所述照明光束的傳遞路徑上；聚光元件，配置於所述照明光束的傳遞路徑上，所述第一透鏡陣列位於所述光源模組與所述聚光元件之間；第二透鏡陣列，配置於來自所述聚光元件的所述照明光束的傳遞路徑上；以及稜鏡元件，配置於來自所述第二透鏡陣列的所述照明光束的傳遞路徑上，所述第二透鏡陣列位於所述聚光元件與所述稜鏡元件之間，其中所述第二透鏡陣列的表面面積大於所述第一透鏡陣列的表面面積。 An illumination system, comprising: a light source module, used to provide an illumination beam; a first lens array, arranged on the transmission path of the illumination beam; a concentrating element, arranged on the transmission path of the illumination beam, and the first A lens array is located between the light source module and the light concentrating element; a second lens array is arranged on the transmission path of the illumination light beam from the light concentrating element; On the transmission path of the illuminating light beam of the second lens array, the second lens array is located between the light concentrating element and the light-emitting element, wherein the surface area of the second lens array is larger than that of the first lens array The surface area of a lens array.

如請求項1所述的照明系統，其中所述第二透鏡陣列包括多個微透鏡，且位於所述第二透鏡陣列的相對兩面。 The illumination system as claimed in claim 1, wherein the second lens array includes a plurality of microlenses located on opposite sides of the second lens array.

如請求項1所述的照明系統，其中所述第二透鏡陣列包括多個微透鏡，且所述多個微透鏡呈六角排列、矩形排列或螺旋排列。 The lighting system according to claim 1, wherein the second lens array includes a plurality of microlenses, and the plurality of microlenses are arranged in a hexagonal arrangement, a rectangular arrangement or a helical arrangement.

如請求項1所述的照明系統，其中所述第二透鏡陣列的延伸方向與所述稜鏡元件的出光面的延伸方向具有夾角。 The lighting system according to claim 1, wherein the extending direction of the second lens array has an included angle with the extending direction of the light-emitting surface of the 稜鏡 element.

如請求項1所述的照明系統，其中所述光源模組包括發光元件以及準直透鏡組，其中所述發光元件提供紅光、綠光以及藍光。 The lighting system according to claim 1, wherein the light source module includes a light emitting element and a collimating lens group, wherein the light emitting element provides red light, green light and blue light.

如請求項5所述的照明系統，其中所述發光元件為紅色、綠色、綠色及藍色發光二極體排列而成。 The lighting system according to claim 5, wherein the light-emitting elements are arranged by red, green, green and blue light-emitting diodes.

如請求項5所述的照明系統，其中所述準直透鏡組包括至少一光學透鏡。 The illumination system as claimed in claim 5, wherein the collimating lens group comprises at least one optical lens.

如請求項5所述的照明系統，其中所述準直透鏡組包括複合拋物面聚光器。 The illumination system as claimed in claim 5, wherein said collimating lens group comprises a compound parabolic concentrator.

如請求項8所述的照明系統，其中所述第一透鏡陣列直接地連接所述複合拋物面聚光器。 The illumination system of claim 8, wherein said first lens array is directly connected to said compound parabolic concentrator.

如請求項1所述的照明系統，其中所述聚光元件具有反射面，用於反射所述照明光束以傳遞至所述第二透鏡陣列。 The illumination system as claimed in claim 1, wherein the light concentrating element has a reflective surface for reflecting the illumination light beam to be delivered to the second lens array.

一種投影裝置，包括：照明系統，用於提供照明光束，所述照明系統包括：光源模組，用於提供照明光束；第一透鏡陣列，配置於所述照明光束的傳遞路徑上；聚光元件，配置於所述照明光束的傳遞路徑上，所述第一透鏡陣列位於所述光源模組與所述聚光元件之間；第二透鏡陣列，配置於來自所述聚光元件的所述照明光束的傳遞路徑上；以及稜鏡元件，配置於來自所述第二透鏡陣列的所述照明光束的傳遞路徑上，所述第二透鏡陣列位於所述聚光元件與所述稜鏡元件之間；光閥，配置於所述照明光束的傳遞路徑上，用於將所述照明光束轉換為影像光束；以及投影鏡頭，配置於所述影像光束的傳遞路徑上，用於將所述影像光束投射出所述投影裝置，其中所述第二透鏡陣列的表面面積大於所述第一透鏡陣列的表面面積。 A projection device, comprising: an illumination system for providing an illumination beam, the illumination system comprising: a light source module, for providing an illumination beam; a first lens array, configured on the transmission path of the illumination beam; a light concentrating element , arranged on the transmission path of the illumination light beam, the first lens array is located between the light source module and the light concentrating element; the second lens array is arranged on the illumination from the light concentrating element On the transmission path of the light beam; and the 稜鏡 element, configured on the transmission path of the illumination light beam from the second lens array, the second lens array is located between the light concentrating element and the 稜鏡 element ; The light valve is configured on the transmission path of the illumination light beam, and is used to direct the illumination converting the light beam into an image light beam; and a projection lens, configured on the transmission path of the image light beam, for projecting the image light beam out of the projection device, wherein the surface area of the second lens array is larger than that of the first lens array The surface area of the lens array.

如請求項11所述的投影裝置，其中所述第二透鏡陣列包括多個微透鏡，且位於所述第二透鏡陣列的相對兩面。 The projection device as claimed in claim 11, wherein the second lens array includes a plurality of microlenses, and are located on opposite sides of the second lens array.

如請求項11所述的投影裝置，其中所述第二透鏡陣列包括多個微透鏡，且所述多個微透鏡呈六角排列、矩形排列或螺旋排列。 The projection device according to claim 11, wherein the second lens array includes a plurality of microlenses, and the plurality of microlenses are in a hexagonal arrangement, a rectangular arrangement or a helical arrangement.

如請求項11所述的投影裝置，其中所述第二透鏡陣列的延伸方向與所述稜鏡元件的出光面的延伸方向具有夾角。 The projection device according to claim 11, wherein the extending direction of the second lens array has an included angle with the extending direction of the light-emitting surface of the galvanized element.

如請求項11所述的投影裝置，其中所述光源模組包括發光元件以及準直透鏡組，其中所述發光元件提供紅光、綠光以及藍光。 The projection device according to claim 11, wherein the light source module includes a light emitting element and a collimating lens group, wherein the light emitting element provides red light, green light and blue light.

如請求項15所述的投影裝置，其中所述發光元件為紅色、綠色、綠色、藍色發光二極體排列而成。 The projection device according to claim 15, wherein the light-emitting elements are red, green, green, and blue light-emitting diodes arranged in an arrangement.

如請求項15所述的投影裝置，其中所述準直透鏡組包括至少一光學透鏡。 The projection device as claimed in claim 15, wherein the collimating lens group includes at least one optical lens.

如請求項15所述的投影裝置，其中所述準直透鏡組包括複合拋物面聚光器。 The projection device according to claim 15, wherein the collimating lens group comprises a compound parabolic concentrator.

如請求項18所述的投影裝置，其中所述第一透鏡陣列直接地連接所述複合拋物面聚光器。 The projection device of claim 18, wherein the first lens array is directly connected to the compound parabolic concentrator.

如請求項11所述的投影裝置，其中所述聚光元件具有反射面，用於反射所述照明光束以傳遞至所述第二透鏡陣列。 The projection device as claimed in claim 11, wherein the light concentrating element has a reflective surface for reflecting the illumination light beam to be delivered to the second lens array.