DLP projector, optical machine and LED light source device calibration method

Abstract

The invention discloses a DLP projector, an optical machine and an LED light source device calibration method. The method comprises the following steps: S101, carrying out collection at a preset position to obtain a standard calibration image; S103, marking the standard calibration image withan LED reference line, wherein the LED reference line is used for calibrating a light source fixing position of an LED light-emitting chip on an LED support, and the light source fixing position is the position, aligned with the optical axis of the collimating lens, on the LED support; S105, placing an LEDlight-emitting chip and an LED support on the lamp adjusting base; S107, acquiring an image to be calibrated at a preset position; S109, moving a PCB to make the LED light-emitting chip attached to the LED reference line; and S111, taking down the calibrated LED light-emitting chip and the PCB from the lamp adjusting base. Therefore, the light-emitting surface of the LED light-emitting chip can accurately face the optical axis of the collimating lens, the positioning error between the LED light-emitting chip and the collimating lens is reduced, the energy utilization rate of the light sourceis improved, and the projection uniformity and the projection quality of the optical machine can be integrally improved.

Description

technical field [0001] The invention relates to the technical field of DLP projection, in particular to a method for calibrating a DLP projector, an optical machine and an LED light source device. Background technique [0002] Micro-projection technology is a new type of modern projection display technology. With its miniaturization and portability, it gradually penetrates into people's daily life, and has gradually become an important development trend of projection display. The digital light processing (Digital Light Processing, DLP) projection display method has the characteristics of high brightness, high contrast, and high resolution. It is combined with a new LED light source to realize a miniaturized portable micro-projection, which meets people's desire for portable and free projection display. demand. [0003] DLP projectors often use three-color (R, G, B) diodes (LEDs) as light sources, where the R, G, and B diodes can be driven to switch sequentially, and then th...

AI Technical Summary

Problems solved by technology

It can be seen that the lighting system needs to go through the longest optical transmission path to reach the target projection plane. The lighting system is a crucial part of the projector system, which determines the energy utilization rate, projection uniformity, and projection quality of the entire projection system; In addition, the lighting system also affects the volume, cost and other aspects of the performance of the projector. For example, when the energy utilization rate of the light source is low and cannot meet the energy demand, it is necessary to configure a larger volume of light source, which will lead to complete machine matching. The size of the parts increases accordingly

[0004] The applicant's research shows that the installation accuracy of the three-color LED will directly affect the transmission direction of the light source, thereby further affecting the utilization rate of the light source, that is, the energy utilization rate of the light source

In the prior art, the PCB board equipped with three-color LEDs is often directly fixed on the main housing of the projector or the housing of the collimation system by means of screws, studs or gluing. However, the PCB board and the main housing of the projector There is a large tolerance between the PCB board and the housing of the collimation system, and the existing tolerance is uncontrollable. Therefore, this fixing method will cause a large positioning error. After a long After the transmission path, the positioning error will be amplified, resulting in serious light energy attenuation, which in turn will seriously affect the projection uniformity and projection quality on the projection plane

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