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Projection system and method

A projection system and projection technology, applied in the field of projection systems, can solve problems such as left-right inversion, upside-down data, and inability to ensure the starting position of scanning mirrors, etc.

Inactive Publication Date: 2012-03-14
FUGANG ELECTRONICS DONGGUAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, during the use of the existing projection system, since the starting position of the scanning mirror cannot be guaranteed, and when the starting position of the scanning mirror is not in line with expectations, the projection laser light cannot be projected normally through the scanning mirror, which will cause the projected data to appear. Upside-down and left-right reverse situations, so it is necessary to develop a projection system that can detect the operation status of the scanning mirror and prevent the projected data from appearing upside-down and left-right reverse situations.

Method used

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  • Projection system and method
  • Projection system and method

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Embodiment Construction

[0023] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0024] see figure 1 and figure 2 The projection system 100 of the present invention includes a light source unit 10, a light source driving circuit 20, a scanning unit 30, a scanning unit driving circuit 40, an exit mirror 50, at least one sensor 60, a processor 70 and a video screen ( not shown in the figure).

[0025] see figure 1 and figure 2 The light source driving circuit 20 of the projection system 100 of the present invention is used to drive the light source unit 10 to generate laser light and periodically emitted detection light, the scanning unit driving circuit 40 is used to drive the scanning unit 30, and the scanning unit 30 has a The scanning lens 301 that can swing around the axis in two directions at the same time, t...

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Abstract

The invention discloses a projection system and method. The projection system comprises a light source unit, a scanning unit, at least one sensor and a processor, wherein the light source unit is used for generating laser light and sensing light; the scanning unit is provided with a scanning lens; the laser light projects to form a projection region and a peripheral invisible region; the sensor is arranged in the invisible region and used for receiving the sensing light and generating a feedback signal; and the processor can be used for receiving the feedback signal and judging the initial swing position of the scanning lens, thereby controlling a projection sequence. According to the projection system disclosed by the invention, the sensing light is transmitted in a scanning way and received by the sensor to generate the feedback signal. The processor can be used for receiving the feedback signal, judging the initial swing position of the scanning lens and controlling the projection sequence, thereby correcting the problems that the projection is upside down and heterochiral.

Description

technical field [0001] The invention relates to a projection system, in particular to a projection system which can improve the accuracy of use. Background technique [0002] An existing projection system applicable to electronic products such as mobile phones, personal data assistants, and portable projectors includes a light source unit, a light source driving circuit, a scanning unit, a scanning unit driving circuit and a processor. The scanning unit has a scanning mirror that can swing back and forth. The processor controls the scanning unit driving circuit and the light source driving circuit; the scanning unit driving circuit is used to drive the scanning mirror to swing, and the light source driving circuit drives the light source unit to generate and output high-power projection laser light, which is output by the light source unit The laser light for projection is emitted in a scanning manner through the swing of the scanning mirror and projected on the exit mirror...

Claims

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Application Information

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IPC IPC(8): G02B27/18G02B26/10G03B21/14G03B21/00
Inventor 游镇安柯丽如
Owner FUGANG ELECTRONICS DONGGUAN