Light source device and display device
A light source and device technology, applied in the field of light source devices and display devices, can solve the problems of low light output efficiency and affect the display effect of the display device, etc., and achieve the effect of ultra-high single-side light output efficiency.
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Embodiment 1
[0044] During specific implementation, in the above-mentioned light source device provided by the embodiment of the present invention, such as figure 2 As shown, the refractive index of the first substrate 01 is equal to that of the second substrate 02 , and the light source device further includes: a grating coupling structure 05 arranged between the waveguide layer 03 and the first substrate 01 .
[0045] In specific implementation, in the above-mentioned light source device provided by the embodiment of the present invention, since the refractive index of the first substrate and the second substrate are equal, when the side-type collimated light source is incident on the waveguide layer at an angle greater than the critical angle, the A waveguide mode is formed, that is, the incident light will be totally reflected at the interface plate of the first substrate and the interface of the second substrate. However, when a grating coupling structure is provided between the wave...
Embodiment 2
[0080] During specific implementation, in the above-mentioned light source device provided by the embodiment of the present invention, such as figure 1 As shown, the refractive index of the second substrate 02 is greater than that of the first substrate 01 .
[0081] During specific implementation, the refractive index of the first substrate is set to n1, the refractive index of the second substrate is n2, and the refractive index of the waveguide layer is n0. When the side-entry collimated light enters the waveguide layer, total reflection occurs at the interface of the first substrate. The critical angle of θ1 is θ1, and the critical angle of total reflection at the interface of the second substrate is θ2. When the light of the side-type collimated light source is incident from the side of the waveguide layer at a preset angle θi (incident angle), it will change with θi , the optical path in the waveguide layer will change. For example: (1) when the incident angle satisfies...
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Abstract
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