TWI714503B - Display apparatus - Google Patents

Display apparatus Download PDF

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TWI714503B
TWI714503B TW109115165A TW109115165A TWI714503B TW I714503 B TWI714503 B TW I714503B TW 109115165 A TW109115165 A TW 109115165A TW 109115165 A TW109115165 A TW 109115165A TW I714503 B TWI714503 B TW I714503B
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light
dimensional image
diffusion
display device
liquid crystal
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TW109115165A
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TW202142923A (en
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范姜冠旭
林淇文
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立景光電股份有限公司
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Abstract

A display apparatus includes a coherent light source, a display unit, a light-diffusing element, and at least one optical element. The coherent light source is configured to provide coherent light beams. The display unit is configured to form a three-dimensional image beam based on interference of the coherent light beams, wherein the three-dimensional image beam is imaged on an intermediate imaging surface after passing through the display unit. The light-diffusing element is located on the intermediate imaging surface, wherein a diffusion angle of the three-dimensional image beam is sequentially changed by passing through the light-diffusing element. The at least one optical element is located on a transmission path of the three-dimensional image beam from the light-diffusing element, and is configured to project the three-dimensional image light beam passing through the display unit out of the display apparatus to display a three-dimensional image.

Description

顯示裝置Display device

本發明是有關於一種使用同調光束的顯示裝置，且特別是有關於一種使用全息術的顯示裝置。The present invention relates to a display device using coherent light beams, and more particularly to a display device using holography.

三維（three-dimensional，3D）顯示技術應用於各種圖像顯示領域，例如，電影、電視（television，TV）、和行動電話等。最終，3D顯示的目的是能夠使人體驗3D效果（彷彿他或她處於真實環境中），因此，一直在對包括例如身歷聲方案和多視角方案等的各種各樣的技術進行研究。全息術（holography）被代表性地用作將3D空間光資訊恢復為真實光的形式的技術。全息術可以基於干涉（即，光的波形性）在空間中將光恢復。Three-dimensional (3D) display technology is applied in various image display fields, such as movies, television (television, TV), and mobile phones. Ultimately, the purpose of 3D display is to enable a person to experience 3D effects (as if he or she is in a real environment). Therefore, various technologies including stereophonic solutions and multi-view solutions have been researched. Holography is representatively used as a technique for restoring 3D spatial light information to the form of real light. Holography can restore light in space based on interference (ie, the waveform of light).

然而，由於使用全息術的顯示裝置所使用的同調光束具有高同調性，因此在空間形成建設性或破壞性干涉（interference）現象，進而在被照射面上產生斑點狀的散斑（speckle）。此種散斑是一種不規則的雜訊狀圖案，具有看似不規則的亮暗雜點，而會導致被照射面上的亮度不均勻。因此，易造成應用此光源的投影裝置的影像品質下降，而令使用者視覺觀感變差。However, since the coherent light beams used in display devices using holography have high coherence, constructive or destructive interference is formed in space, and speckle-like speckles are generated on the illuminated surface. This kind of speckle is an irregular noise-like pattern with seemingly irregular bright and dark noise points, which will cause uneven brightness on the illuminated surface. Therefore, the image quality of the projection device using the light source is likely to be degraded, and the user's visual perception is deteriorated.

現有一種用於消除使用同調光束的一般顯示裝置的散斑的方法是在同調光源的前面設置振動鏡以使同調光束均勻化，但是，由於此種方法會改變相干光束的空間光信息，因此會影響全息圖的形成，所以無法被應用於使用全息術的顯示裝置上。An existing method for eliminating speckle in general display devices using coherent light beams is to install a vibrating mirror in front of the coherent light source to homogenize the coherent light beam. However, because this method changes the spatial light information of the coherent light beam, it will It affects the formation of holograms, so it cannot be applied to display devices using holography.

本發明提供一種顯示裝置，能夠提供具有良好影像品質的影像。The present invention provides a display device capable of providing images with good image quality.

本發明的顯示裝置包括同調光源、顯示單元、光擴散元件以及至少一光學元件。同調光源提供一同調光束。顯示單元基於對於同調光束的干涉而形成一三維圖像光束，三維圖像光束在通過顯示單元後成像於一中間成像面上。光擴散元件設置於中間成像面上，其中三維圖像光束通過光擴散元件而時序性改變三維圖像光束的擴散角度。至少一光學元件位於來自於光擴散元件的三維圖像光束的傳遞路徑上，用於將通過顯示單元的三維圖像光束投影出顯示裝置，以顯示三維圖像。The display device of the present invention includes a coherent light source, a display unit, a light diffusion element and at least one optical element. The co-tuned light source provides a co-tuned beam. The display unit forms a three-dimensional image beam based on the interference of the coherent beam, and the three-dimensional image beam is imaged on an intermediate imaging surface after passing through the display unit. The light diffusion element is arranged on the intermediate imaging surface, wherein the three-dimensional image beam passes through the light diffusion element to sequentially change the diffusion angle of the three-dimensional image beam. At least one optical element is located on the transmission path of the three-dimensional image beam from the light diffusion element, and is used to project the three-dimensional image beam passing through the display unit out of the display device to display the three-dimensional image.

在本發明的一實施例中，上述的光擴散元件具有一致動器，致動器與光擴散元件電性連接，並用於以一驅動頻率驅動光擴散元件。In an embodiment of the present invention, the aforementioned light diffusing element has an actuator, and the actuator is electrically connected to the light diffusing element, and is used to drive the light diffusing element at a driving frequency.

在本發明的一實施例中，上述的致動器用於驅動光擴散元件振動，且驅動頻率為光擴散元件的振動頻率。In an embodiment of the present invention, the aforementioned actuator is used to drive the light diffusion element to vibrate, and the driving frequency is the vibration frequency of the light diffusion element.

在本發明的一實施例中，上述的致動器用於驅動光擴散元件轉動，且驅動頻率為光擴散元件的轉動頻率。In an embodiment of the present invention, the aforementioned actuator is used to drive the light diffusion element to rotate, and the driving frequency is the rotation frequency of the light diffusion element.

在本發明的一實施例中，上述的光擴散元件為一液晶元件，且光擴散元件包括一控制器，控制器控制液晶元件中的液晶分子的排列狀態隨時序改變。In an embodiment of the present invention, the above-mentioned light diffusion element is a liquid crystal element, and the light diffusion element includes a controller, and the controller controls the arrangement state of the liquid crystal molecules in the liquid crystal element to change with time.

在本發明的一實施例中，上述的控制器能夠控制光擴散元件形成多個擴散圖案，各擴散圖案分別在不同的時序中對應地形成，且光擴散元件形成其中一擴散圖案時的液晶分子的排列狀態與光擴散元件形成另一擴散圖案時的液晶分子的排列狀態彼此不同。In an embodiment of the present invention, the above-mentioned controller can control the light diffusion element to form a plurality of diffusion patterns, and each diffusion pattern is correspondingly formed in a different time sequence, and the liquid crystal molecules when the light diffusion element forms one of the diffusion patterns The arrangement state of and the arrangement state of liquid crystal molecules when the light diffusion element forms another diffusion pattern are different from each other.

在本發明的一實施例中，上述的控制器能夠控制光擴散元件的一擴散圖案切換頻率，擴散圖案切換頻率為單位時間內的多個擴散圖案形成的頻率，且當多個擴散圖案的種類為N種時，切換頻率的範圍大於60赫茲的N倍。In an embodiment of the present invention, the above-mentioned controller can control a diffusion pattern switching frequency of the light diffusion element. The diffusion pattern switching frequency is the frequency of the formation of multiple diffusion patterns per unit time, and when the type of the multiple diffusion patterns is In the case of N types, the range of the switching frequency is greater than N times of 60 Hz.

基於上述，本發明的實施例的顯示裝置可以通過光擴散元件的配置來調節三維圖像光束的整體的均勻性。因此，通過光擴散元件形成的三維圖像光束具有良好的均勻性，如此，顯示裝置能夠提供呈現均勻亮度的三維圖像，進而改善影像品質和使用者的視覺觀感。Based on the above, the display device of the embodiment of the present invention can adjust the overall uniformity of the three-dimensional image light beam through the configuration of the light diffusion element. Therefore, the three-dimensional image beam formed by the light diffusion element has good uniformity. In this way, the display device can provide a three-dimensional image showing uniform brightness, thereby improving the image quality and the user's visual perception.

圖1是依照本發明一實施例的顯示裝置的結構示意圖。請參照圖1，在本實施例中，顯示裝置100包括同調光源110、顯示單元120、光擴散元件130以及至少一光學元件140。同調光源110用以提供一同調光束50。舉例而言，在本實施例中，同調光源110是雷射光源，顯示單元120可為一矽基液晶面板(liquid-crystal-on-silicon panel, LCOS panel)，而可用以調制同調光束50的相位，以使通過顯示單元120的同調光束50能夠基於彼此之間的干涉來形成三維圖像光束60。然而，本發明不以此為限，在其他實施例中，顯示單元120亦可以是其他可用以調制同調光束50的相位的光束調變器。只要顯示單元120可以用作空間光調製器，並且可以具有能夠調制同調光束50的相位的結構即可。FIG. 1 is a schematic structural diagram of a display device according to an embodiment of the invention. 1, in this embodiment, the display device 100 includes a coherent light source 110, a display unit 120, a light diffusion element 130 and at least one optical element 140. The co-tuned light source 110 is used to provide a co-tuned beam 50. For example, in this embodiment, the coherent light source 110 is a laser light source, and the display unit 120 can be a liquid-crystal-on-silicon panel (LCOS panel), which can be used to modulate the coherent light beam 50. Phase so that the coherent light beams 50 passing through the display unit 120 can form a three-dimensional image light beam 60 based on interference with each other. However, the present invention is not limited to this. In other embodiments, the display unit 120 may also be other beam modulators that can be used to modulate the phase of the co-modulated beam 50. As long as the display unit 120 can be used as a spatial light modulator and can have a structure capable of modulating the phase of the coherent light beam 50.

此外，如圖1所示，在本實施例中，顯示裝置100還可包括一透鏡ML。具體而言，透鏡ML可以被設置成對應於顯示單元120上的每個像素，並將同調光束50引導到顯示單元120中的特定位置上，以使同調光束50能有效地被調制為三維圖像光束60，其中三維圖像光束60記載了形成三維圖像所需的空間光資訊(spatial light information)。In addition, as shown in FIG. 1, in this embodiment, the display device 100 may further include a lens ML. Specifically, the lens ML can be arranged to correspond to each pixel on the display unit 120, and guide the coherent beam 50 to a specific position in the display unit 120, so that the coherent beam 50 can be effectively modulated into a three-dimensional image. The image beam 60, wherein the three-dimensional image beam 60 records the spatial light information required to form a three-dimensional image.

如此，顯示單元120基於對於同調光束50的干涉而能用以形成三維圖像光束60，並且，如圖1所示，三維圖像光束60在通過顯示單元120後成像於一中間成像面IS上。更具體而言，如圖1所示，在本實施例中，光擴散元件130也設置於中間成像面IS上。In this way, the display unit 120 can be used to form a three-dimensional image beam 60 based on the interference of the coherent beam 50, and, as shown in FIG. 1, the three-dimensional image beam 60 is imaged on an intermediate imaging surface IS after passing through the display unit 120 . More specifically, as shown in FIG. 1, in this embodiment, the light diffusion element 130 is also disposed on the intermediate imaging plane IS.

進一步而言，如圖1所示，在本實施例中，光擴散元件130具有一致動器131，致動器131與光擴散元件130電性連接，並用於以一驅動頻率驅動光擴散元件130。舉例而言，致動器131用於驅動光擴散元件130轉動且驅動頻率為光擴散元件130的轉動頻率。Furthermore, as shown in FIG. 1, in this embodiment, the light diffusion element 130 has an actuator 131, and the actuator 131 is electrically connected to the light diffusion element 130, and is used to drive the light diffusion element 130 at a driving frequency. . For example, the actuator 131 is used to drive the light diffusion element 130 to rotate, and the driving frequency is the rotation frequency of the light diffusion element 130.

如此，三維圖像光束60通過光擴散元件130而時序性改變三維圖像光束60的擴散角度。並且，由於視覺暫留的作用，人眼所觀察到的被照射面上的光斑亮度會是一視覺暫留時間內的不同時間點之光斑的疊加後的亮度。由於光擴散元件130能使三維圖像光束60的光斑分布隨時間而改變，但不影響其記錄的空間光資訊，因此，通過光擴散元件130的三維圖像光束60在不同時間點中的光斑分佈並不相同，但三維圖像光束60仍可以保有其記錄的空間光資訊。因此，這些視覺暫留時間內的不同時間點之光斑的疊加之後會產生亮度較為均勻的光斑，進而使通過光擴散元件130而形成的三維圖像光束60具有更好的均勻度，並仍能保有其記錄的空間光資訊而能順利顯示三維圖像。In this way, the three-dimensional image light beam 60 passes through the light diffusion element 130 to sequentially change the diffusion angle of the three-dimensional image light beam 60. Moreover, due to the effect of persistence of vision, the brightness of the light spots on the illuminated surface as observed by the human eye will be the superimposed brightness of the light spots at different time points within the duration of the vision. Since the light diffusing element 130 can change the spot distribution of the three-dimensional image light beam 60 over time, but does not affect the spatial light information recorded by it, the light spots of the three-dimensional image light beam 60 passing through the light diffusing element 130 at different time points The distribution is not the same, but the three-dimensional image beam 60 can still retain its recorded spatial light information. Therefore, the superposition of the light spots at different time points in the visual duration will produce a light spot with a relatively uniform brightness, so that the three-dimensional image beam 60 formed by the light diffusion element 130 has better uniformity and still can It retains its recorded spatial light information and can display three-dimensional images smoothly.

具體而言，由於光擴散元件130是配置為用以時序性改變三維圖像光束60的擴散角度，因此，光擴散元件130的尺寸較佳為略大於三維圖像光束60成像於中間成像面IS上的尺寸，以使光擴散元件130能對整體的三維圖像光束60的均勻度進行調整。舉例而言，在本實施例中，光擴散元件130的尺寸範圍大於1公分。Specifically, since the light diffusing element 130 is configured to sequentially change the diffusion angle of the three-dimensional image light beam 60, the size of the light diffusing element 130 is preferably slightly larger than that of the three-dimensional image light beam 60 on the intermediate imaging surface IS. The size of the upper part, so that the light diffusion element 130 can adjust the uniformity of the overall three-dimensional image beam 60. For example, in this embodiment, the size range of the light diffusing element 130 is greater than 1 cm.

進一步而言，如圖1所示，在本實施例中，至少一光學元件140位於來自於光擴散元件130的三維圖像光束60的傳遞路徑上，用於將通過顯示單元120的三維圖像光束60投射出顯示裝置100，以顯示三維圖像。舉例而言，在本實施例，通過中間成像面IS的三維圖像光束60可被傳遞至光學元件140處，並且經由這些光學元件140投射出顯示裝置100外後再次成像，以顯示三維圖像。光學元件140包括凹面鏡CM或擋風玻璃WS等的光學元件。如此，由於通過光擴散元件130而形成的三維圖像光束60具有良好的均勻度，因此顯示裝置100也將能夠提供亮度均勻的顯示畫面，進而提升影像品質以及使用者的視覺觀感。Furthermore, as shown in FIG. 1, in this embodiment, at least one optical element 140 is located on the transmission path of the three-dimensional image beam 60 from the light diffusion element 130, and is used to transfer the three-dimensional image passing through the display unit 120 The light beam 60 is projected out of the display device 100 to display a three-dimensional image. For example, in this embodiment, the three-dimensional image light beam 60 passing through the intermediate imaging plane IS can be transmitted to the optical element 140, and projected out of the display device 100 through these optical elements 140 and then imaged again to display the three-dimensional image . The optical element 140 includes an optical element such as a concave mirror CM or a windshield WS. In this way, since the three-dimensional image beam 60 formed by the light diffusion element 130 has good uniformity, the display device 100 will also be able to provide a display screen with uniform brightness, thereby improving the image quality and the user's visual perception.

圖2A是依照一比較例的習知顯示裝置提供的圖像的正視圖。圖2B是依照圖1的顯示裝置提供的圖像的正視圖。用以顯示圖2A的影像的習知顯示裝置與圖1的顯示裝置100類似，而差異如下所述，習知顯示裝置不具有光擴散元件130的配置。如此，如圖2A所示，習知的顯示裝置的影像出現了明顯的光斑，相對於此，如圖2B所示，顯示裝置100的影像則是亮度均勻且清楚，而具有良好的影像品質並改善使用者的視覺觀感。2A is a front view of an image provided by a conventional display device according to a comparative example. FIG. 2B is a front view of an image provided by the display device according to FIG. 1. FIG. The conventional display device for displaying the image of FIG. 2A is similar to the display device 100 of FIG. 1, but the difference is as follows. The conventional display device does not have the configuration of the light diffusing element 130. In this way, as shown in FIG. 2A, the image of the conventional display device has obvious light spots. In contrast, as shown in FIG. 2B, the image of the display device 100 is uniform and clear in brightness, and has good image quality. Improve the user's visual perception.

值得注意的是，在前述的實施例中，致動器131雖以用於驅動光擴散元件130轉動為例，但本發明不以此為限。在另一實施例中，致動器131也可驅動光擴散元件130振動，而使三維圖像光束60的光斑分布隨時間而改變。以下將進行進一步地說明。It is worth noting that in the foregoing embodiments, although the actuator 131 is used to drive the light diffusion element 130 to rotate as an example, the present invention is not limited thereto. In another embodiment, the actuator 131 can also drive the light diffusion element 130 to vibrate, so that the spot distribution of the three-dimensional image beam 60 changes with time. This will be further explained below.

圖3是依照本發明另一實施例的顯示裝置的結構示意圖。請參照圖3，圖3的顯示裝置300與圖1的顯示裝置100類似，而差異如下所述。致動器131用於驅動光擴散元件130振動，且驅動頻率為光擴散元件130的振動頻率。如此，顯示裝置100仍可通過光擴散元件130的配置，來對整體的三維圖像光束60的均勻度進行調整，而亦可使顯示裝置300能達到與前述的顯示裝置100類似的效果與優點，在此就不再贅述。FIG. 3 is a schematic structural diagram of a display device according to another embodiment of the invention. Please refer to FIG. 3. The display device 300 of FIG. 3 is similar to the display device 100 of FIG. 1, but the differences are as follows. The actuator 131 is used to drive the light diffusion element 130 to vibrate, and the driving frequency is the vibration frequency of the light diffusion element 130. In this way, the display device 100 can still adjust the uniformity of the overall 3D image beam 60 through the configuration of the light diffusion element 130, and the display device 300 can also achieve similar effects and advantages to the aforementioned display device 100. , I won’t repeat it here.

進一步而言，由於本實施例的光擴散元件130是通過振動的方式來使三維圖像光束60的光斑分布隨時間而改變，因以相較於通過轉動的方式，光擴散元件130的移動範圍較小。因此，顯示裝置300的體積可進一步地減少。Furthermore, since the light diffusing element 130 of this embodiment vibrates to make the spot distribution of the three-dimensional image light beam 60 change over time, the moving range of the light diffusing element 130 is compared with that of rotating. Smaller. Therefore, the volume of the display device 300 can be further reduced.

圖4是依照本發明又一實施例的顯示裝置的結構示意圖。請參照圖4，圖4的顯示裝置400與圖3的顯示裝置300類似，而差異如下所述。在本實施例中，光擴散元件430為一液晶元件LC，且光擴散元件430包括一控制器432，控制器432控制液晶元件LC中的液晶分子的排列狀態隨時序改變。舉例而言，當液晶元件LC中的的液晶分子的光軸方向實質上互相混亂而互相交錯，此時通過光擴散元件430的三維圖像光束60會被液晶分子所散射。換言之，當控制器432控制液晶元件LC中的液晶分子的排列狀態為混亂狀態時，光擴散元件430則可呈現霧化態，並可用以改變三維圖像光束60的擴散角度。另一方面，控制器432控制液晶元件LC中液晶分子的光軸方向實質上一致時，通過光擴散元件430的三維圖像光束60的擴散角度則不會被改變。換言之，此時的光擴散元件430則可呈現透明態。4 is a schematic structural diagram of a display device according to another embodiment of the invention. Please refer to FIG. 4. The display device 400 of FIG. 4 is similar to the display device 300 of FIG. 3, but the differences are as follows. In this embodiment, the light diffusing element 430 is a liquid crystal element LC, and the light diffusing element 430 includes a controller 432, and the controller 432 controls the arrangement state of the liquid crystal molecules in the liquid crystal element LC to change with time. For example, when the optical axis directions of the liquid crystal molecules in the liquid crystal element LC are substantially disordered and interlaced with each other, the three-dimensional image beam 60 passing through the light diffusion element 430 will be scattered by the liquid crystal molecules. In other words, when the controller 432 controls the arrangement state of the liquid crystal molecules in the liquid crystal element LC to be in a chaotic state, the light diffusing element 430 can be in a fogging state and can be used to change the diffusion angle of the three-dimensional image beam 60. On the other hand, when the controller 432 controls the optical axis directions of the liquid crystal molecules in the liquid crystal element LC to be substantially the same, the diffusion angle of the three-dimensional image light beam 60 passing through the light diffusion element 430 will not be changed. In other words, the light diffusion element 430 at this time can be in a transparent state.

如此，當控制器432控制液晶元件LC中的液晶分子的排列狀態隨時序改變時，通過光擴散元件430的三維圖像光束60的擴散角度也會因此而隨時序改變。如此，顯示裝置400仍可通過光擴散元件430的配置，來對整體的三維圖像光束60的均勻度進行調整。因此，顯示裝置400亦能達到與前述的顯示裝置300類似的效果與優點。以下將進行進一步的說明。In this way, when the controller 432 controls the arrangement state of the liquid crystal molecules in the liquid crystal element LC to change in time sequence, the diffusion angle of the three-dimensional image light beam 60 passing through the light diffusion element 430 also changes in time sequence accordingly. In this way, the display device 400 can still adjust the uniformity of the overall three-dimensional image beam 60 through the configuration of the light diffusion element 430. Therefore, the display device 400 can also achieve similar effects and advantages to the aforementioned display device 300. Further explanation will be given below.

更具體而言，控制器432還可控制光擴散元件430的液晶分子的排列狀態依據其所在區域而呈現特定的排列狀態。也就是說，控制器432能夠控制光擴散元件430形成多個擴散圖案。並且，控制器432還可控制各擴散圖案分別在不同的時序中對應地形成，且光擴散元件430形成其中一擴散圖案時的液晶分子的排列狀態與光擴散元件430形成另一擴散圖案時的液晶分子的排列狀態彼此不同。More specifically, the controller 432 can also control the arrangement state of the liquid crystal molecules of the light diffusion element 430 to present a specific arrangement state according to the region where it is located. That is, the controller 432 can control the light diffusion element 430 to form a plurality of diffusion patterns. In addition, the controller 432 can also control the diffusion patterns to be correspondingly formed in different timings, and the arrangement state of the liquid crystal molecules when the light diffusion element 430 forms one of the diffusion patterns is the same as that when the light diffusion element 430 forms the other diffusion pattern. The arrangement states of the liquid crystal molecules are different from each other.

更具體而言，在本實施例中，控制器432能夠控制光擴散元件430的一擴散圖案切換頻率，擴散圖案切換頻率為單位時間內的多個擴散圖案形成的頻率，且當多個擴散圖案的種類為N種時，切換頻率的範圍大於60赫茲的N倍。如此，控制器432可通過控制光擴散元件430的擴散圖案種類以及其擴散圖案切換頻率，來對整體的三維圖像光束60的均勻度進行調整，而亦可使顯示裝置400能達到與前述的顯示裝置300類似的效果與優點，在此就不再贅述。More specifically, in this embodiment, the controller 432 can control a diffusion pattern switching frequency of the light diffusion element 430. The diffusion pattern switching frequency is the frequency formed by multiple diffusion patterns per unit time, and when the multiple diffusion patterns When the type of is N, the switching frequency range is greater than N times of 60 Hz. In this way, the controller 432 can adjust the uniformity of the overall three-dimensional image light beam 60 by controlling the type of diffusion pattern of the light diffusion element 430 and the switching frequency of the diffusion pattern, and the display device 400 can also achieve the aforementioned The similar effects and advantages of the display device 300 will not be repeated here.

綜上所述，本發明的實施例的顯示裝置可以通過光擴散元件的配置來調節三維圖像光束的整體的均勻性。因此，通過光擴散元件形成的三維圖像光束具有良好的均勻性，如此，顯示裝置能夠提供呈現均勻亮度的三維圖像，進而改善影像品質和使用者的視覺觀感。In summary, the display device of the embodiment of the present invention can adjust the overall uniformity of the three-dimensional image beam through the configuration of the light diffusion element. Therefore, the three-dimensional image beam formed by the light diffusion element has good uniformity. In this way, the display device can provide a three-dimensional image showing uniform brightness, thereby improving the image quality and the user's visual perception.

雖然本發明已以實施例揭露如上，然其並非用以限定本發明，任何所屬技術領域中具有通常知識者，在不脫離本發明的精神和範圍內，當可作些許的更動與潤飾，故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

50:同調光束50: Coherent beam

60:三維圖像光束60: 3D image beam

100、300、400:顯示裝置100, 300, 400: display device

110:同調光源110: Coherent light source

120:顯示單元120: display unit

130、430:光擴散元件130, 430: light diffusion element

131:致動器131: Actuator

140:光學元件140: optical components

432:控制器432: Controller

CM:凹面鏡CM: Concave mirror

IS:中間成像面IS: Intermediate imaging surface

LC:液晶元件LC: liquid crystal element

ML:透鏡ML: lens

WS:擋風玻璃WS: Windshield

圖1是依照本發明一實施例的顯示裝置的結構示意圖。 圖2A是依照一比較例的習知顯示裝置提供的圖像的正視圖。 圖2B是依照圖1的顯示裝置提供的圖像的正視圖。 圖3是依照本發明另一實施例的顯示裝置的結構示意圖。 圖4是依照本發明又一實施例的顯示裝置的結構示意圖。 FIG. 1 is a schematic structural diagram of a display device according to an embodiment of the invention. 2A is a front view of an image provided by a conventional display device according to a comparative example. FIG. 2B is a front view of an image provided by the display device according to FIG. 1. FIG. FIG. 3 is a schematic structural diagram of a display device according to another embodiment of the invention. 4 is a schematic structural diagram of a display device according to another embodiment of the invention.

50:同調光束 50: Coherent beam

60:三維圖像光束 60: 3D image beam

100:顯示裝置 100: display device

110:同調光源 110: Coherent light source

120:顯示單元 120: display unit

130:光擴散元件 130: light diffusion element

131:致動器 131: Actuator

140:光學元件 140: optical components

CM:凹面鏡 CM: Concave mirror

IS:中間成像面 IS: Intermediate imaging surface

ML:透鏡 ML: lens

WS:擋風玻璃 WS: Windshield

Claims (3)

一種顯示裝置，包括：一同調光源，提供一同調光束；一顯示單元，基於對於所述同調光束的干涉而形成一三維圖像光束，所述三維圖像光束在通過所述顯示單元後成像於一中間成像面上；一光擴散元件，設置於所述中間成像面上，其中所述三維圖像光束通過所述光擴散元件而時序性改變所述三維圖像光束的擴散角度，所述光擴散元件為一液晶元件，且所述光擴散元件包括一控制器，所述控制器控制所述液晶元件中的液晶分子的排列狀態隨時序改變；以及至少一光學元件，位於來自於所述光擴散元件的所述三維圖像光束的傳遞路徑上，用於將通過所述顯示單元的所述三維圖像光束投影出所述顯示裝置，以顯示三維圖像。 A display device includes: a co-tuned light source to provide a co-tuned beam; a display unit that forms a three-dimensional image beam based on the interference of the co-tuned beam, and the three-dimensional image beam is imaged on the display unit after passing through the display unit An intermediate imaging surface; a light diffusion element, arranged on the intermediate imaging surface, wherein the three-dimensional image light beam passes through the light diffusion element to sequentially change the diffusion angle of the three-dimensional image light beam, and the light The diffusion element is a liquid crystal element, and the light diffusion element includes a controller that controls the arrangement state of the liquid crystal molecules in the liquid crystal element to change with time; and at least one optical element located in the light source On the transmission path of the three-dimensional image beam of the diffusion element, the three-dimensional image beam passing through the display unit is projected out of the display device to display a three-dimensional image. 如請求項1所述的顯示裝置，其中所述控制器能夠控制所述光擴散元件形成多個擴散圖案，各所述擴散圖案分別在不同的時序中對應地形成，且所述光擴散元件形成其中一所述擴散圖案時的液晶分子的排列狀態與所述光擴散元件形成另一所述擴散圖案時的液晶分子的排列狀態彼此不同。 The display device according to claim 1, wherein the controller is capable of controlling the light diffusion element to form a plurality of diffusion patterns, each of the diffusion patterns is correspondingly formed in different timings, and the light diffusion element is formed The arrangement state of the liquid crystal molecules in one of the diffusion patterns is different from the arrangement state of the liquid crystal molecules when the light diffusion element forms the other diffusion pattern. 如請求項2所述的顯示裝置，其中所述控制器能夠控制所述光擴散元件的一擴散圖案切換頻率，所述擴散圖案切換頻率為單位時間內的所述多個擴散圖案形成的頻率，且當所述多個 擴散圖案的種類為N種時，所述切換頻率的範圍大於60赫茲的N倍。The display device according to claim 2, wherein the controller is capable of controlling a diffusion pattern switching frequency of the light diffusion element, and the diffusion pattern switching frequency is a frequency at which the plurality of diffusion patterns are formed per unit time, And when the multiple When there are N types of diffusion patterns, the range of the switching frequency is greater than N times of 60 Hz.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2433175B1 (en) * 2009-05-21 2017-01-11 IMAX Theatres International Limited Optical projection system with lenslet arrangement on speckle reduction element

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2433175B1 (en) * 2009-05-21 2017-01-11 IMAX Theatres International Limited Optical projection system with lenslet arrangement on speckle reduction element

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