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Projection device

A projection device and projection technology, applied in the field of projection display, can solve problems such as retinal damage and human eye health, and achieve the effects of avoiding damage, improving comfort and safety

Inactive Publication Date: 2018-11-06
QISDA OPTRONICS (SUZHOU) CO LTD +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

Excessive short-wave blue light radiation will cause damage to the retina of the human eye, and long-term use will affect human eye health

Method used

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Embodiment Construction

[0036] In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

[0037] Certain terms are used in the description and claims to refer to particular elements. Those of ordinary skill in the art will appreciate that manufacturers may refer to the same element by different terms. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Include" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to".

[0038] refer to figure 1 As shown, a schematic structural diagram of the first embodiment of the projection device of the present invention is disclosed. The projection device 10 includes a projection lens unit 11, a sensing unit 12, a pr...

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Abstract

The invention provides a projection device capable of dynamically adjusting blue light. The projection device comprises a projection lens unit, a sensing unit, a processing unit and an adjusting unit;the projection lens unit is used for clearly projecting an image to a projection area to display the projected image; the sensing unit is used for sensing the adjusting condition of the projection lens unit; the processing unit is used for determining an index value of the blue light intensity according to the adjusting condition, sensed by the sensing unit, of the projection lens unit and the corresponding relation between the adjusting condition of the projection lens unit and the projected image sizes and the projection distances; and the adjusting unit adjusts the intensity of the blue light according to the index value of the blue light intensity. According to the projection device, information including the projected image size and the projection distance can be obtained by means ofstate detection on the projection lens unit, then the blue light intensity in the unit projection area is adjusted to avoid the condition that viewers are subjected to too much blue light and eyes are injures, and therefore the viewing comfort and the safety are improved.

Description

technical field [0001] The invention relates to the field of projection display, in particular to a projection device capable of dynamically adjusting blue light. Background technique [0002] At present, laser light sources are widely used in the field of projection display due to their advantages of pure color, good directionality, and long life. Usually a blue laser is used as the excitation source, and the red and green light sources are obtained through phosphor powder; there are also blue and red dual-color lasers and green light sources as the primary color light source for projection display. The blue laser is a laser with a single wavelength, and in consideration of excitation efficiency, the wavelength of the blue light is generally shorter. Excessive short-wave blue light radiation will cause damage to the retina of the human eye, and long-term use will affect human eye health. [0003] Therefore, it is necessary to design a novel projection device to overcome t...

Claims

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Application Information

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IPC IPC(8): G03B21/20
CPCG03B21/204G03B21/2053
Inventor 何旭升施柏维
Owner QISDA OPTRONICS (SUZHOU) CO LTD
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