Abstract
ABSTRACTThis paper presents an examination of the control of optical quenching according to the junction temperature of a high-brightness laser. A high-brightness blue laser source is being reviewed for head-up display). The laser is problematic, however, because its luminous efficiency, and hence its lifetime, is reduced due to its low laser junction temperature, and particularly due to its blue optical quenching, which is a disadvantageous characteristic. This problem was addressed by applying a current supply method with a high-frequency pulse width modulation (PWM) scheme and a digital micro-mirror device panel based on a method using a color wheel that uses yellow phosphor material. PWM of the frequency and analysis and optimization of the duty ratio enabled the prevention of the optical quenching of the blue laser to obtain high optical efficiency.
Highlights
This paper presents an examination of the control of optical quenching according to the junction temperature of a high-brightness laser
The laser is problematic, because its luminous efficiency, and its lifetime, is reduced due to its low laser junction temperature, and due to its blue optical quenching, which is a disadvantageous characteristic. This problem was addressed by applying a current supply method with a high-frequency pulse width modulation (PWM) scheme and a digital micro-mirror device panel based on a method using a color wheel that uses yellow phosphor material
The methods that can be used to enhance the image color so that it exceeds 24 bits in the projection system structure of head-up displays (HUDs) that use a digital micro-mirror device (DMD) panel are based on the use of different light sources, including light-emitting diodes (LEDs), blue laser, phosphor, and a halogen lamp [1]
Summary
The methods that can be used to enhance the image color so that it exceeds 24 bits in the projection system structure of head-up displays (HUDs) that use a digital micro-mirror device (DMD) panel are based on the use of different light sources, including light-emitting diodes (LEDs), blue laser, phosphor, and a halogen lamp [1]. This temperature characteristic of the wavelength appears to be the cause of the change in the image color of a virtual display that uses a DMD panel.
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