| When people began to be able to observe the world without leaving their homes,the vast sky could also appear in front of them,all these miracles depend on the progress of display technology,from the cathode ray tube to the widespread application of liquid crystal technology,from OLED display devices sweeping the market to three-dimensional display technology that can interact with images.Such as computers,TV,mobile phones and other equipment are also constantly updated,display equipment will bring us no longer 2D plane visual experience,with the development of 3D display technology,as well as virtual reality,augmented reality,we can in a more three-dimensional image world to observe,experience.Nowadays,the mainstream realization means of 3D display include holographic display and free stereoscopic display,especially the latter.After combining the market needs and the development status of industrial production technology,more and more 3D display equipment based on free stereoscopic display technology appears in people’s vision.This is followed by the demand for lightweight,miniaturization and stability of such display devices.To meet this demand,organic light-emitting diode(OLED)is widely used as a light-emitting device for 3D display.However,traditional OLED-based naked eye 3D technology relies on complex optical systems.Multiple independent optical elements increase the size and complexity of the device.Therefore,this thesis proposes a3 D display device with integrated resonator and dielectric metasurface on OLED,aiming to solve the problem that traditional devices are difficult to miniaturize and integrate.Since the emergence of metasurface,researchers have developed a variety of functions of metasurface in application level,such as metasurface,vortex beam generator,beam deflector,etc.In the field of engineering,the need for highly integrated and miniaturized industrial equipment creates a broad stage for metasurface.This thesis will focus on metasurface,briefly discuss its development process and future prospects.Combining with the practical demand of 3D display technology,the thesis focuses on how the metasurface can accurately control the phase of the outgoing light wave.This thesis also introduces the luminous principle of OLED and the common OLED structure and materials,and discusses the luminous performance of OLED combined with optical resonator.The most important performance of OLED is the emission Angle of the outgoing light wave.By limiting the Angle,we can adapt to the requirements of the metasurface on the incident light wave.In addition,the basic principle of distributed Bragg reflector(DBR),the research status of dynamic metasurface and the possibility of future application in 3D display field are briefly introduced in this thesis,which provides a new idea for3 D display technology in the future.In this thesis,the effects of structural parameters on the performance of integrated distributed Bragg reflector and metasurface OLED are systematically analyzed by using three-dimensional finite-difference time-domain method.A micro-cavity OLED is designed to minimize the beam divergence Angle without losing the external quantum efficiency of the OLED.By adding DBR to the bottom of the OLED,it forms an optical resonator.By using the micro-cavity resonance characteristics,the appropriate wavelength is selected to emit,ensuring the direction of the light source.In addition,three different DBR materials,namely titanium dioxide,tantalum pentoxide and silicon nitride,are selected in this thesis,aiming to find a reflector with superior performance and relatively simple manufacturing process,so as to provide a good beam emission environment for the subsequent realization of the light source of the open-hole 3D equipment.At the same time,a transmission-type phase metasurface is introduced in this thesis,and the influence of the two working environments of the metasurface in air and glass on its performance is discussed.Titanium dioxide and crystalline silicon are selected to construct the metasurface respectively.During the design process,the height,radius and period of the metasurface are changed to observe its complex transmissibility.Artificially constructed smooth gradient phase,directional deflection of the light emitted by the OLED,so that it can accurately reach the specified eye of the observer,thus achieving a three-dimensional display effect.The proposal of this device fills the gap of metasurface in the field of OLED integration,provides a new idea for the miniaturization of 3D display equipment,and provides a new choice for the development of virtual reality and augmented reality technology.It is a promising alternative for three-dimensional display. |
