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Projector

A projector, opto-mechanical technology, used in optics, instruments, projection devices, etc.

Inactive Publication Date: 2009-07-29
QISDA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned earlier, it is not allowed to install components on the back of the optical machine to perform calibration operations, which makes the main circuit board and the semi-closed housing only supported by copper pillars, so the copper pillars will stand alone in this space , without other components overlapping the copper pillars, which may cause the copper pillars to produce antenna effects in EMI

Method used

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Embodiment Construction

[0016] figure 1 A perspective view showing a preferred embodiment of the projector of the present invention. The projector 100 includes an optical engine 10 , a casing 20 carrying the optical engine 10 , a circuit board 30 , a casing 40 , a copper pillar 50 and a shrapnel 60 . Wherein, the shell 20 and the shell 40 are both made of metal, the circuit board 30 is plugged on the top of the optical machine 10, and the shell 40 covers the circuit board 30 in a way of sandwiching up and down, so it is semi-closed, and the shell 40 It is supported by the copper pillar 50 and connects the shell 40 to the shell 20 , so that the electromagnetic wave generated by the circuit board 30 is guided to the shell 20 through the shell 40 and the copper pillar 50 to achieve the effect of grounding.

[0017] The shrapnel 60 is made of metal, one end is fixed on the optical machine 10, and the other end is kept in contact with the copper column 50. In this embodiment, the shrapnel 60 generally fo...

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PUM

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Abstract

The invention discloses a projector, which includes a circuit board arranged above the optical machine, in order to prevent electromagnetic interference, the circuit board is covered with a semi-closed casing, and a copper column is used to connect the semi-closed casing and accommodate The casing of the optical machine is used to achieve the purpose of grounding. At the same time, a metal shrapnel is set to make it contact with the copper column, so as to increase the grounding effect of the copper column and avoid the antenna effect of the copper column with electromagnetic interference.

Description

technical field [0001] The invention relates to a technology for preventing electromagnetic interference in a projector, in particular to a technology for arranging a metal shrapnel in the projector to contact a supporting copper column to prevent electromagnetic interference. Background technique [0002] With the advancement of projector technology, the light machine of the projector has two holes on the back of the light source to calibrate the accuracy of the light machine, so no components can be placed on the back of the light machine. In addition, in order to reduce costs, do not use expensive The flexible cable (FPC) to drive the chip of the digital micromirror device (DMD), but the main circuit board is directly plugged into the optical machine through the slot. Since the back of the optical machine is not allowed to set any components, the usual configuration The optical machine is below, and the main circuit board is plugged in above the optical machine. [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/00
Inventor 彭荣兴李轩诚
Owner QISDA CORP