Journal of Applied Optics, Volume. 43, Issue 5, 973(2022)

Application of PWM dimming based on Grassmann optical model

Zongqian LI... Yan SHI*, Yinghua LIAO and Yi LUO |Show fewer author(s)
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    Figures & Tables(13)
    Diagram of chromaticity analysis of CIE x-y
    Diagram of overall design of system hardware
    Schematic diagram of main control module circuit
    Schematic of coloured lantern module relationship
    Flow chart of system software control
    Flow chart of software control design
    Schematic diagram of illumination detection experiment of colored lamp
    Experimental diagram of illuminance with mixed red and blue light
    • Table 1. Luminous intensity of WS2812B

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      Table 1. Luminous intensity of WS2812B

      光源颜色发光强度I/mcd
      红色390~420
      绿色660~720
      蓝色180~200
    • Table 2. Maximum illuminance measurement data of monochromatic light

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      Table 2. Maximum illuminance measurement data of monochromatic light

      光源颜色符号光通量等级光通量等级百分比%/照度测量值/lx
      红色Er255100122.71
      绿色Eg255100215.86
      蓝色Eb255100262.14
    • Table 3. Illuminance measurement data of blue light

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      Table 3. Illuminance measurement data of blue light

      光源颜色光通量等级光通量等级百分比/%照度测量值/lx照度理论值/lx差值百分比/%(精度范围±4%)
      蓝色255100261.50262.14−0.24
      蓝色20480212.00209.71−1.09
      蓝色15360158.67157.28−0.88
      蓝色10240104.33104.86+0.51
      蓝色512051.9252.43+0.97
      蓝色000.000.000.00
    • Table 4. Red and blue mixed illuminance measurement data

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      Table 4. Red and blue mixed illuminance measurement data

      光源颜色光通量等级光通量等级百分比/%照度测量值/lx照度理论值/lx差值百分比%/(精度范围±4%)
      蓝色 红色255100372.00384.85+3.34
      蓝色 红色20480300.5307.88+2.40
      蓝色 红色15360228.66230.91+0.97
      蓝色 红色10240155.50153.94−1.01
      蓝色 红色512077.5076.97−0.69
      蓝色 红色0000.000.00
    • Table 5. Illuminance measurement data of mixed red, green and blue light

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      Table 5. Illuminance measurement data of mixed red, green and blue light

      光源颜色光通量等级光通量等级百分比//%照度测量值/lx照度理论值/lx差值百分比/%(精度范围±4%)
      蓝色 红色 绿色255100542.17600.71+9.75%
      蓝色 红色 绿色20480438.00480.57+8.86%
      蓝色 红色 绿色15360346.83360.43+3.77%
      蓝色 红色 绿色10240236.00240.28+1.78%
      蓝色 红色 绿色5120117.86120.14+1.90%
      蓝色 红色 绿色0000.000.00
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    Zongqian LI, Yan SHI, Yinghua LIAO, Yi LUO. Application of PWM dimming based on Grassmann optical model[J]. Journal of Applied Optics, 2022, 43(5): 973

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    Paper Information

    Category: OPTICAL ELEMENT AND FABRICATION

    Received: Mar. 9, 2022

    Accepted: --

    Published Online: Oct. 12, 2022

    The Author Email: SHI Yan (sy71Email@163.com)

    DOI:10.5768/JAO202243.0505001

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