Analysis of the Temperature Dependence of Phosphor Conversion Efficiency in White Light-Emitting Diodes

Ryu, Guen-Hwan; Ryu, Han-Youl

doi:10.3807/josk.2015.19.3.311

Cited by 14 publications

(13 citation statements)

References 12 publications

(10 reference statements)

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“…Through the analysis of the equal proportion of the edge length of similar triangle and the analysis of the green and blue primary colors, it can be concluded that the target luminance should meet the requirements of formula (7).…”

Section: Proposed Algorithmmentioning

confidence: 99%

“…According to the requirements of formula (7) and the calculation method of formula (5), it can be concluded that the PWM of the color compensation module should be revised as shown in formula (8).…”

Section: Proposed Algorithmmentioning

confidence: 99%

“…However, due to the characteristics of phosphors, the material of phosphors is mainly YAG. The luminous efficiency of phosphor conversion materials varies at different temperature . The emission of phosphor depends on the intensity of blue light and the conversion efficiency of phosphors.…”

Section: Introductionmentioning

confidence: 99%

“…The luminous efficiency of phosphor conversion materials varies at different temperature. 7,8 The emission of phosphor depends on the intensity of blue light and the conversion efficiency of phosphors. Usually, the phosphor wheel rotates at high speed, and its working temperature mainly depends on the incident blue laser power and heat dissipation environment.…”

Section: Introductionmentioning

confidence: 99%

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A laser current control algorithm to avoid color distortion in laser projection displays

Guo

Wang

et al. 2019

J Soc Info Display

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Laser display technology has gradually become an important solution for large screen display. As a mature lighting technology in recent decades, phosphor has been widely used in the field of lighting and display. As a solid‐state light source, it has the advantages of low power consumption, environmental protection, rich color, and dynamic modulation. The luminescent efficiency of phosphors varies with temperature, which results in the nonlinearity of phosphor emission when the light source is dynamically modulated and the color temperature drift of the display image. In this paper, a control model of color temperature of laser TV display changing with laser current and temperature is established. The color temperature of laser TV is corrected by using current compensation control algorithm. The problem of color temperature drift caused by the change of phosphor conversion efficiency with t7emperature is solved. The color temperature deviation is 1118 K in the luminance range of the light source before compensation. By compensating and controlling the laser current, the ratio of blue light and phosphor is constant when the luminance changes, thus ensuring the color temperature constant when the luminance of the laser light source changes. The color temperature deviation is 50 K in the luminance range. By analyzing the different luminance of the display image, the stability of the color temperature is improved.

show abstract

Section: Proposed Algorithmmentioning

confidence: 99%

Section: Proposed Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A laser current control algorithm to avoid color distortion in laser projection displays

Guo

Wang

et al. 2019

J Soc Info Display

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show abstract

“…However, due to the characteristics of phosphors, the material of phosphors is mainly YAG. The luminous efficiency of phosphor conversion materials varies at different temperature [7][8] . The emission of phosphor depends on the intensity of blue light and the conversion efficiency of phosphors.…”

Section: Because Of the Low Efficiency Of Green Light Serious Specklementioning

confidence: 99%

29.4: A laser current control algorithm to avoid color distortion in laser projection displays

Guo

Wang

et al. 2019

Symp Digest of Tech Papers

View full text Add to dashboard Cite

Laser display technology has gradually become an important solution for large screen display. As a mature lighting technology in recent decades, phosphor has been widely used in the field of lighting and display. As a solid‐state light source, it has the advantages of low power consumption, environmental protection, rich color and dynamic modulation. The luminescent efficiency of phosphors varies with temperature, which results in the non‐linearity of phosphor emission when the light source is dynamically modulated and the color temperature drift of the display image. In this paper, a control model of color temperature of laser TV display changing with laser current and temperature is established. The color temperature of laser TV is corrected by using current compensation control algorithm. The problem of color temperature drift caused by the change of phosphor conversion efficiency with temperature is solved. The color temperature deviation is 1118 K in the brightness range of the light source before compensation. By compensating and controlling the laser current, the ratio of blue light and phosphor is constant when the brightness changes, thus ensuring the color temperature constant when the brightness of the laser light source changes. The color temperature deviation is 50K in the brightness range. By analyzing the different brightness of the display image, the stability of the color temperature is improved.

show abstract

A Comparative Thermal and Lumen Performance Study of Thin-film Amorphous Silicon Dielectric Coating on Aluminum as an LED Packaging Substrate

Chidambaram,

Jayalakshmi,

Ramachandran

et al. 2024

Silicon

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Analysis of the Temperature Dependence of Phosphor Conversion Efficiency in White Light-Emitting Diodes

Cited by 14 publications

References 12 publications

A laser current control algorithm to avoid color distortion in laser projection displays

A laser current control algorithm to avoid color distortion in laser projection displays

29.4: A laser current control algorithm to avoid color distortion in laser projection displays

A Comparative Thermal and Lumen Performance Study of Thin-film Amorphous Silicon Dielectric Coating on Aluminum as an LED Packaging Substrate

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