| With the widespread use of LED(Light Emitting Diode)and full-color displays in modern life,people have improved the quality of the visual effects of the display determined by parameters such as brightness and chromaticity.The health effects of the human body make demands.In the three-color full-color display of red,green and blue,blue light stimulation can cause brain excitement,on the one hand,it can improve work and study efficiency,on the other hand,it can cause sleep disturbance at night,affecting the human body’s circadian rhythm.At present,the visual parameters(brightness,saturation,hue,etc.)of display devices are relatively convenient and easy to adjust,that is,the visual effects have been basically controllable and adjustable,but in non-visual effects such as blue light that affects the circadian rhythm of the human body Radiation pays less attention,and even lacks evaluation criteria for non-visual effects,let alone quantitatively adjusts the nonvisual effects of display devices.With the increasing reliance on electronic display devices such as computers,mobile phones,ipads,and people receiving blue light radiation at close range,it is inevitable that it will affect the circadian rhythm and cause sub-health problems such as sleep disorders.Therefore,it is of great practical significance to study the effect of blue light radiation on the human body’s circadian rhythm.Therefore,this paper takes VR(Virtual Reality),which has close-range blue radiation to the human body,as the research object,quantitatively evaluates the degree of influence of existing VR equipment on the human circadian rhythm,and develops a Micro-LED display based on VR device with adjustable circadian rhythm.It mainly includes the following aspects:(1)Explain the research background of health display,and point out that the research direction of this article is to study the effect of VR equipment on human circadian rhythm.Introduced the method of Micro-LED display applied to full-color display,pointed out that Micro-LED display will be widely used in VR devices because of its high PPI,point out that the goal of this article is based on the display device to the human body circadian rhythm The impact of Micro-LED full-color display on VR equipment gives guidance.(2)Explain clearly what is the circadian rhythm effect,and the physiological reason why the light source has a circadian rhythm effect on the human body.At the same time,analyze the work results of the Gall team and summarize the experimental method of this article,that is,this article will use the C(λ)curve to analyze the effect of VR display devices on the human circadian rhythm from the perspective of the spectrum,based on circadian rhythm parameters,such as circadian factors(Circadian Action Factor(CAF),Circadian Illuminance(CIL),CIL and melatonin inhibition rate.Design an evaluation system to quantitatively evaluate the circadian performance of smartphone-based VR devices.It also introduces the parameters and calculation methods that can characterize the color performance of the display device.(3)Quantitatively evaluate the effect of VR equipment on human circadian rhythm,build a test platform to evaluate VR equipment circadian rhythm parameters,complete the collection of VR equipment spectrum and circadian rhythm parameters,quantitatively calculate the impact of existing VR equipment on human circadian rhythm At the same time,we solved the problem of how to reduce the impact of VR devices on the circadian rhythm of the human body.We adopted three methods to turn on the blue light filter mode,load the blue light filter film,and turn on the blue light filter mode and load the blue light filter film at the same time to reduce the VR device spectrum.The blue light content of the results confirmed that reducing the blue light content in the spectrum can indeed reduce the impact on the human circadian rhythm,although this is accompanied by changes in the color performance of the display device.At the same time,we propose that setting the green light wavelength in the VR device to be near 555nm can display the effect of reducing the VR device on the circadian rhythm of the human body.The influence of the human body’s circadian rhythm.(4)To solve the problem of how to enhance the effect of VR equipment on the circadian rhythm of the human body,the solution we adopted was to add a blue light supplement module to increase the CAF parameter value,and use Texas Instruments LM3409 as the core component to add a blue LED fill light device for the VR device The device adopts the current PWM(Pulse-Width Modulation)dimming method to adjust the optical power of the blue light supplementary light module to complete the goal of parameterizing the effect of VR equipment on the circadian rhythm of the human body.Finally,an improved scheme of Micro-LED display with built-in blue light supplement module applied to VR equipment is proposed. |
