IMAGE DISPLAY DEVICE
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United States of America Patent
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N/A
Issued Date -
N/A
app pub date -
Oct 24, 2014
filing date -
Jun 29, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In a vehicle display device, a transmission-type intermediate image screen is provided with a diffusion layer in which bead diffusion materials are used. A luminous intensity half-value angle of a transmission light distribution angle of the light transmitted through the transmission-type intermediate image screen is ±7.5 to 10 degrees. Given, when a virtual image of a size of about 10 inches is presented 1.7 to 2 meters ahead of a user, that a target value of the resolution of the actual image formed by the transmission-type intermediate image screen is set to be R and that the luminous intensity half-width at half-maximum angle of the transmission light distribution angle of the light transmitted through the diffusion layer is set to be A, a thickness T of the diffusion layer inside the transmission-type intermediate image screen satisfies 0
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