CN112433428A

CN112433428A - DLP projector, optical machine and LED light source device calibration method

Info

Publication number: CN112433428A
Application number: CN202010833216.1A
Authority: CN
Inventors: 程炎; 孙峰; 朱青
Original assignee: Shenzhen Anhua Optoelectronics Technology Co Ltd
Current assignee: Shenzhen Anhua Photoelectric Technology Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-03-02
Anticipated expiration: 2040-08-18
Also published as: CN112433428B

Abstract

The invention discloses a DLP projector, an optical machine and a method for calibrating an LED light source device, wherein the method comprises the following steps: step S101, acquiring a standard calibration image at a preset position; step S103, marking an LED reference line on the standard calibration image, wherein the LED reference line is used for calibrating a light source fixing position of the LED light-emitting chip on the LED support, and the light source fixing position is a position on the LED support aligned with an optical axis of the collimating lens; s105, placing the LED light-emitting chip and the LED bracket on a light adjusting base; s107, acquiring an image to be calibrated at a preset position; step S109, moving the PCB to enable the LED light-emitting chip to be attached to the LED reference line; and step 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, and then the energy utilization rate of a light source is improved, so that the projection uniformity and the projection quality of the light machine can be integrally improved.

Description

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

Technical Field

The invention relates to the technical field of DLP projection, in particular to a DLP projector, an optical machine and a calibration method of an LED light source device.

Background

The micro projection technology is a novel modern projection display technology, gradually permeates into the daily life of people by virtue of the miniaturization and portability of the micro projection technology, and gradually becomes a great important development trend of projection display. Digital Light Processing (DLP) projection display mode has the characteristics of high brightness, high contrast and high resolution, is combined with a novel LED Light source, realizes miniaturized portable miniature projection, and meets the requirements of people on portability and freedom of projection display.

DLP projectors often use three-color (R, G, B) diodes (LEDs) as the light source, wherein R, G, B diodes are driven to turn on and off sequentially, and then the image is projected onto a target projection plane, such as a screen, through an illumination system. For example, the R, G, B diode light source is projected onto the target plane along the light path sequentially through the collimating system, the light combining system, the reflector, the Digital Micromirror Device (DMD) imaging system, the rear lens group, and the front lens group. Therefore, the illumination system needs to reach a target projection plane through the longest light path transmission path, is a vital part in a projector system, and determines the energy utilization rate, the projection uniformity, the projection quality and the like of the whole projection system; in addition, the lighting system also affects the performance of the projector in terms of volume, cost, and the like, for example, when the energy utilization rate of the light source is low and the energy requirement cannot be met, a larger-volume light source needs to be configured, which results in the corresponding increase of the volume of the complete machine kit.

The research of the applicant shows that the mounting accuracy of the three-color LED can directly influence the transmission direction of the light source, thereby further influencing the utilization rate of the light source, namely the energy utilization rate of the light source. In the prior art, a PCB board equipped with a three-color LED is usually directly fixed on a main chassis of a projector or a housing of a collimation system by screws, studs or gluing, however, a large tolerance exists between the PCB board and the main chassis of the projector or between the PCB board and the housing of the collimation system, and the existing tolerance is not controllable, so that a large positioning error is caused by the fixing manner, and after the PCB board passes through a long transmission path, the positioning error is amplified, so that the attenuation of light energy is serious, and then, the projection uniformity and the projection quality on a projection plane are seriously affected.

Therefore, how to improve the energy utilization rate of the light source, and improve the projection uniformity and the projection quality becomes an urgent technical problem to be solved.

Disclosure of Invention

Based on the above situation, the present invention is directed to a DLP projector, an optical engine and a method for calibrating an LED light source device, so as to improve the energy utilization of the light source, and improve the projection uniformity and the projection quality.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

according to a first aspect, the embodiment of the invention discloses a method for calibrating an LED light source device for a DLP projector, the DLP projector comprises an optical machine, the optical machine comprises a collimating lens and a collimating lens mounting seat, and the method is characterized in that the calibrating method is used for calibrating and fixing an LED light-emitting chip and an LED bracket to obtain the LED light source device, wherein the LED light-emitting chip is fixed on a PCB board, and the PCB board can be mounted on the collimating lens mounting seat through the LED bracket so that the light-emitting surface of the LED light-emitting chip faces the collimating lens and is positioned on the optical axis of the collimating lens; the calibration method comprises the following steps:

step S101, acquiring a standard calibration image facing a light adjusting base at a preset position; step S103, marking an LED reference line on the standard calibration image, 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 a position which is aligned with an optical axis of the collimating lens after the LED support is fixed on the collimating lens mounting seat; s105, placing the LED light-emitting chip and the LED support on a light adjusting base, wherein the LED support is positioned by the light adjusting base, and the LED light-emitting chip is movably arranged on the LED support through a PCB; s107, collecting an LED light-emitting chip and an LED bracket which are positioned on a light adjusting base at a preset position to obtain an image to be calibrated; step S109, moving the PCB to enable the LED light-emitting chip to be attached to the LED reference line, and obtaining the calibrated LED light-emitting chip and the calibrated PCB; and step S111, taking down the calibrated LED light-emitting chip and the PCB from the lamp adjusting base so as to cure the calibrated LED light-emitting chip and the calibrated PCB.

Optionally, step S101 includes: step S1011, placing a standard LED light source device on a light adjusting base; the standard LED light source device comprises: the standard LED light-emitting device comprises a standard LED light-emitting chip and a standard LED bracket, wherein the standard LED light-emitting chip is positioned at a standard light source fixing position of the standard LED bracket; step S1013, collecting a standard LED light source device on a light adjusting base at a preset position to obtain a standard calibration image; step S103 includes: determining a standard outline of a standard LED light-emitting chip on the standard calibration image; and marking the standard outline to obtain an LED reference line.

Optionally, between step S1011 and step S1013, the method further includes: step S1012, fixing the lamp adjusting base so as to make the position of the lamp adjusting base relative to the world coordinate system unchanged; in step S105, the LED light emitting chip and the LED holder are placed on the fixed lamp adjusting base so that the position of the LED holder with respect to the world coordinate system is the same as the position of the standard LED holder with respect to the world coordinate system.

Optionally, before step S105, the method further includes: and step S104, pre-bonding the PCB with the LED light-emitting chip on the LED bracket by glue, wherein the curing time of the glue exceeds the preset time.

Optionally, the glue is black glue, or the glue is heat-resistant glue.

Optionally, the LED support has a placement hole; in step S104, after the PCB board and the LED support are pre-bonded, the LED light emitting chip passes through the placing hole; in step S105, the PCB is attached to the upper end surface of the lamp adjusting base, and the LED bracket is away from the upper end surface of the lamp adjusting base.

Optionally, after step S111, the method further includes: step S113, after a first time interval, judging whether the calibrated LED light-emitting chip is attached to an LED reference line; if the calibrated LED light-emitting chip is attached to the LED reference line, executing the step S115; and S115, standing the calibrated LED light-emitting chip and the PCB for at least exceeding a second time interval so as to cure the calibrated LED light-emitting chip and the PCB.

According to a second aspect, an embodiment of the present invention discloses an optical machine, including:

a plurality of LED light source devices calibrated using any of the methods disclosed in the first aspect above.

According to a third aspect, an embodiment of the present invention discloses a DLP projector, including:

the light engine as disclosed in any of the above second aspects.

According to the DLP projector, the optical machine and the LED light source device calibration method disclosed by the embodiment, after a standard calibration image is acquired by facing a lamp adjusting base at a preset position, an LED reference line is marked on the standard calibration image, the LED reference line marks the light source fixing position of an LED light emitting chip on an LED support, and the LED support is fixed on a collimating lens mounting seat and then aligns to the position of the optical axis of a collimating lens; then, the LED light-emitting chip and the LED support are placed on the lamp adjusting base, the image to be calibrated is acquired through the same preset position, the LED light-emitting chip is moved to be attached to an LED reference line, and the calibrated LED light-emitting chip and the calibrated PCB are obtained. Therefore, the LED light-emitting chip after calibration is accurate in position relative to the LED support, and the LED support and the collimating lens mounting seat can be formed through the die, so that the LED support and the collimating lens mounting seat can be accurately positioned, namely, the light source fixing position of the LED support can be accurately aligned to the optical axis of the collimating lens. 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, and then the energy utilization rate of a light source is improved, so that the projection uniformity and the projection quality of the light machine can be integrally improved.

As an optional scheme, the PCB with the LED light-emitting chip is pre-bonded on the LED bracket through glue, the curing time of the glue exceeds the preset time, on one hand, the curing time of the glue exceeds the preset time, so that the PCB can be conveniently moved; on the other hand, because the PCB is pre-adhered on the LED bracket, the PCB cannot fall off from the LED bracket in the process of moving the PCB.

Other advantages of the present invention will be described in the detailed description, and those skilled in the art will understand the technical features and technical solutions presented in the description.

Drawings

Embodiments according to the present invention will be described below with reference to the accompanying drawings. In the figure:

fig. 1 is a schematic view of an optical-mechanical structure of a DLP projector disclosed in this embodiment;

fig. 2 is a bottom exploded view of the mounting structure of the PCB board and the LED bracket according to the present embodiment;

fig. 3 is a flowchart illustrating a method for calibrating an LED light source device for a DLP projector according to the present embodiment;

fig. 4 is a schematic diagram illustrating a principle of a calibration apparatus for an LED light source device according to the present disclosure;

fig. 5A and fig. 5B are schematic diagrams of a standard calibration image collected according to the present embodiment, where fig. 5A is a flowchart of a method for collecting a standard calibration image facing a lamp adjusting base according to the present embodiment, and fig. 5B is a schematic diagram of a standard calibration image disclosed in the present embodiment;

fig. 6 is a schematic view of a movable arrangement structure of the PCB 32 and the LED bracket 4 disclosed in this embodiment;

fig. 7A and 7B are schematic diagrams of an image to be calibrated according to the present embodiment, where fig. 7A is a schematic diagram in an uncalibrated state, and fig. 7B is a schematic diagram in a state after calibration is completed;

fig. 8 is a perspective view of an optical mechanical device disclosed in this embodiment.

Detailed Description

In a DLP projector, in order to improve energy utilization of a light source, improve projection uniformity and projection quality, the present embodiment discloses a method for calibrating an LED light source device of the DLP projector, where the DLP projector includes an optical machine, please refer to fig. 1 and 2, where fig. 1 is a schematic diagram of an optical machine structure of the DLP projector disclosed in the present embodiment, fig. 2 is a schematic diagram of an upward explosion of a PCB board and an LED bracket mounting structure disclosed in the present embodiment, and in a specific embodiment, the optical machine includes a collimating lens 1, a collimating lens mounting base 2 and an LED light source device, where the LED light source device includes: the LED light-emitting device comprises an LED light-emitting chip 31 and an LED support 4, wherein the LED light-emitting chip 31 is fixed on the LED support 4 through a PCB 32.

Referring to fig. 3, it is a flowchart of a calibration method for an LED light source device of a DLP projector disclosed in this embodiment, the calibration method is used to calibrate and fix an LED light emitting chip 31 and an LED bracket 4 to obtain the LED light source device, wherein the LED light emitting chip 31 is fixed on a PCB board 32, and the PCB board 32 can be mounted on a collimator lens mount 2 through the LED bracket 4, so that a light emitting surface of the LED light emitting chip 31 faces a collimator lens 1 and is located on an optical axis of the collimator lens 1. The calibration method of the LED light source device disclosed by the embodiment comprises the following steps:

and S101, acquiring a standard calibration image facing the lamp adjusting base at a preset position. Referring to fig. 4, a schematic diagram of a calibration apparatus for an LED light source device disclosed in this embodiment is shown, the calibration apparatus includes a light adjustment base T1, a workbench T2, and a camera T3, wherein the light adjustment base T1 is disposed on the workbench T2, the camera T3 is fixed at a preset position, and performs image acquisition toward the light adjustment base T1, and transmits the acquired image to a display screen or a projection screen for display. In this embodiment, the camera T3 may be a camera with a magnifying function, such as a microscope; the camera T3 may be fixed focus or may be adjustable. In this embodiment, a standard calibration image is acquired by the camera T3 facing the light adjustment base, and the standard calibration image is displayed by the display device. In a specific embodiment, the standard relative position can be indicated by the relative position between the standard LED light emitting chip and the standard LED support, specifically, please refer to the description below.

In an alternative embodiment, please refer to fig. 5A, which is a flowchart illustrating a method for acquiring a standard calibration image by a lamp adjusting base according to the present embodiment, wherein step S101 includes:

step S1011, placing the standard LED light source device on the light adjusting base. The standard LED light source device comprises: the LED light-emitting device comprises a standard LED light-emitting chip and a standard LED support, wherein the standard LED light-emitting chip is located at a standard light source fixing position of the standard LED support. In this embodiment, the standard LED light source device is a device in which the standard LED light emitting chip is accurately located at the light source fixing position of the standard LED bracket, and specifically, the standard LED light source device may be a model as long as the relative position of the standard LED light emitting chip and the standard LED bracket can be indicated, in other words, the standard LED light emitting chip and the standard LED bracket may also be only one profile pattern. It should be noted that the profile of the standard LED light emitting chip should be the same as the profile of the LED light emitting chip 31 to be calibrated, and the profile of the standard LED support should be the same as the profile of the LED support 4 to be calibrated.

And S1013, collecting a standard LED light source device on the light adjusting base at a preset position to obtain a standard calibration image. Referring to fig. 5B, a schematic diagram of a standard calibration image disclosed in this embodiment is shown, where the standard calibration image is displayed on a display screen T4, and a standard LED light emitting chip and a standard LED support are imaged in the standard calibration image, where the standard LED support is shown as a white filled frame, the standard LED light emitting chip is shown as a diamond filled frame, and the standard LED light emitting chip is located on the standard LED support. In the standard calibration image, the standard LED light emitting chip can be considered to be precisely located on the light source fixing position of the standard LED support.

Step S103, marking the LED reference line on the standard calibration image. The LED reference line is used to calibrate a light source fixing position of the LED light emitting chip 31 on the LED support 4, where the light source fixing position is a position aligned with the optical axis of the collimating lens 1 after the LED support is fixed on the collimating lens mounting base 2.

In a specific embodiment, step S103 includes: determining a standard outline of a standard LED light-emitting chip on the standard calibration image; and marking the standard outline to obtain an LED reference line. Specifically, referring to fig. 5B, an LED reference line may be marked on the display screen T4 along the outline of the standard LED light emitting chip, as shown by the dotted line in fig. 5B, where the area surrounded by the dotted line is the position of the standard LED light emitting chip on the standard LED support.

Step S105, the LED light emitting chip 31 and the LED support 4 are placed on the lamp adjusting base. The LED light emitting chip 31 is movably arranged on the LED support 4 through the PCB 32, the LED support 4 is positioned by the light adjusting base, and the LED light emitting chip 31 is fixed on the PCB 32. Referring to fig. 6, which is a schematic diagram of a movable arrangement structure of the PCB 32 and the LED support 4 disclosed in this embodiment, the LED support 4 has a placing hole through which the LED light emitting chip 31 passes.

And S107, collecting the LED light-emitting chip 31 and the LED bracket 4 which are positioned on the light adjusting base at a preset position to obtain an image to be calibrated. Fig. 7A and fig. 7B are schematic diagrams of an image to be calibrated according to the present embodiment, where fig. 7A is a schematic diagram of an uncalibrated state, and fig. 7B is a schematic diagram of a state after calibration is completed. In this embodiment, since the camera T3 is fixed at the preset position, after the camera T3 captures images toward the light adjustment base T1, the positions of the LED stands displayed on the display screen or the projection screen are the same, that is, the positions of the light sources of different LED stands fixed on the display screen or the projection screen are the same, that is, as shown by the dotted lines in fig. 7A and 7B.

Step S109, moving the PCB 32 to make the LED light emitting chip 31 adhere to the LED reference line, so as to obtain the calibrated LED light emitting chip 31 and the calibrated PCB 32. In order to calibrate the LED chip 31 and the PCB 32, the PCB 32 may be moved, so that the LED chip 31 fixed on the PCB 32 may be moved in the same manner. Referring to fig. 7B, the LED light emitting chip 31 is moved to fit the LED reference line, so that it can be determined that the LED light emitting chip 31 is already located on the light source fixing position of the PCB 32.

Step S111, the calibrated PCB 32 and the LED support 4 are removed from the lamp-adjusting base to cure the calibrated PCB 32 and the LED support 4. In practice, when the calibrated PCB 32 and the LED holder 4 are removed, the PCB 32 and the LED holder 4 should be kept from relative movement. After the PCB board 32 and the LED support 4 are cured, the LED light emitting chip 31 is fixed on the light source fixing position of the PCB board 32.

In order to ensure that the position of the light adjusting base T1 relative to the world coordinate system is unchanged, so that the light sources of the LED brackets are fixed and located at the same imaging position on the display screen, in an embodiment, referring to fig. 5a, between step S1011 and step S1013, the method further includes:

step S1012, fixing the lamp adjusting base so that the position of the lamp adjusting base relative to the world coordinate system is unchanged. In a specific embodiment, the worktable T2 may be used as a world coordinate system, and specifically, the light adjusting base T1 may be fixed by, for example, a magnetic attraction device, so that the position of the light adjusting base T1 relative to the worktable T2 is unchanged, that is, the light adjusting base T1 is not misaligned relative to the worktable T2.

In step S105, the LED light emitting chip 31 and the LED support 4 are placed on the fixed lamp-adjusting base so that the position of the LED support 4 with respect to the world coordinate system is the same as the position of the standard LED support with respect to the world coordinate system.

In this embodiment, through the fixed lamp base of transferring, can make the LED support 4 of waiting to calibrate the same with the formation of image position of standard LED support on the display screen, that is to say, the LED support 4 of waiting to calibrate is the same with the world coordinate of standard LED support, from this, can ensure that the light source fixed position of different supports is the same.

In an alternative embodiment, before step S105, the method further includes:

step S104, pre-bonding the PCB 32 with the LED light-emitting chip 31 on the LED bracket 4 by glue, wherein the curing time of the glue exceeds the preset time. Specifically, the glue may be a black glue, having a curing time period exceeding a preset time period; or the glue is heat-resistant glue so as to prevent the PCB 32 and the LED bracket 4 from falling off due to overheating of the ambient temperature.

In a specific embodiment, the LED support 4 has a placement hole, and in step S104, after the PCB board 32 and the LED support 4 are pre-bonded, the LED light emitting chip 31 passes through the placement hole, and as shown in fig. 6, the LED light emitting chip 31 passes through the placement hole of the LED support 4.

In order to facilitate the camera T3 to collect images and facilitate the taking and placing of the LED support 4, in step S105, the PCB 32 is attached to the upper end surface of the lamp adjusting base, and the LED support 4 is far away from the upper end surface of the lamp adjusting base. In this embodiment, the up end of lamp base is transferred in the laminating of PCB board 32, and LED support 4 keeps away from the up end of transferring the lamp base to can make LED luminescence chip 31 and LED support 4 towards camera T3, then, the camera T3 of being convenient for gathers the image.

In an optional embodiment, after step S111, the method further includes:

step S113, after a first time interval, determines whether the calibrated LED light emitting chip 31 is attached to the LED reference line. Specifically, the calibrated LED light emitting chip 31, the PCB 32, and the LED bracket 4 may be placed in a lamp adjusting base, images of the LED light emitting chip 31, the PCB 32, and the LED bracket 4 are collected, and on the display screen, whether the LED light emitting chip 31 is attached to the LED reference line is determined. If the calibrated LED light emitting chip 31 is the bonded LED reference line, step S115 is executed. In particular, the first time interval may be determined empirically as long as the PCB board 32 and the LED cradle 4 are not fully cured.

Step S115, the calibrated LED light emitting chip 31 and the PCB 32 are left standing for at least a second time interval to cure the calibrated LED light emitting chip 31 and the PCB 32.

Referring to fig. 8, the optical machine according to this embodiment is a schematic perspective view of the optical machine according to this embodiment, and the optical machine includes a plurality of LED light source devices, and the LED light source devices are calibrated by the method disclosed in any of the above embodiments.

The embodiment also discloses a DLP projector, which comprises the optical machine disclosed by any embodiment.

It will be appreciated by those skilled in the art that the above-described preferred embodiments may be freely combined, superimposed, without conflict.

It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions for details described herein may be made by those skilled in the art without departing from the basic principles of the invention.

Claims

1. An LED light source device calibration method for a DLP projector, the DLP projector comprising an optical machine, the optical machine comprising a collimating lens (1) and a collimating lens mount (2), characterized in that, the calibration method is used for calibrating and fixing an LED light emitting chip (31) and an LED support (4) to obtain an LED light source device, wherein, the LED light emitting chip (31) is fixed on a PCB board (32), the PCB board (32) can be mounted on the collimating lens mount (2) through the LED support (4), so that the light emitting surface of the LED light emitting chip (31) faces the collimating lens (1) and is located on the optical axis of the collimating lens (1);

the calibration method comprises the following steps:

step S101, acquiring a standard calibration image facing a light adjusting base at a preset position;

step S103, marking an LED reference line on the standard calibration image, wherein the LED reference line is used for calibrating a light source fixing position of the LED light-emitting chip (31) on the LED support (4), and the light source fixing position is a position for aligning the optical axis of the collimating lens (1) after the LED support is fixed on the collimating lens mounting seat (2);

s105, placing the LED light-emitting chip (31) and the LED support (4) on the light adjusting base, wherein the LED support (4) is positioned by the light adjusting base, and the LED light-emitting chip (31) is movably arranged on the LED support (4) through a PCB (32);

s107, collecting the LED light-emitting chip (31) and the LED bracket (4) on the light adjusting base at the preset position to obtain an image to be calibrated;

step S109, moving the PCB (32) to enable the LED light-emitting chip (31) to be attached to the LED reference line, and obtaining the calibrated LED light-emitting chip (31) and the calibrated PCB (32);

and S111, taking down the calibrated PCB (32) and the LED bracket (4) from the lamp adjusting base to cure the calibrated PCB (32) and the LED bracket (4).

2. The LED light source device calibration method according to claim 1, wherein the step S101 includes:

step S1011, placing a standard LED light source device on a light adjusting base; the standard LED light source device comprises: the LED light-emitting device comprises a standard LED light-emitting chip and a standard LED bracket, wherein the standard LED light-emitting chip is positioned at a standard light source fixing position of the standard LED bracket;

step S1013, collecting the standard LED light source device on the light adjusting base at the preset position to obtain the standard calibration image;

the step S103 includes:

determining a standard outline of the standard LED light-emitting chip on the standard calibration image;

and marking the standard outline to obtain the LED reference line.

3. The LED light source device calibration method according to claim 2, further comprising, between the step S1011 and the step S1013:

step S1012, fixing the light adjusting base so as to make the position of the light adjusting base relative to the world coordinate system unchanged;

in the step S105, the LED light emitting chip (31) and the LED support (4) are placed on the fixed lamp adjusting base, so that the position of the LED support (4) relative to the world coordinate system is the same as the position of the standard LED support relative to the world coordinate system.

4. The LED light source device calibration method according to any one of claims 1 to 3, further comprising, before the step S105:

and S104, pre-bonding the PCB (32) with the LED light-emitting chip (31) on the LED bracket (4) by glue, wherein the curing time of the glue exceeds the preset time.

5. The method for calibrating an LED light source device of claim 4, wherein said glue is a black glue or said glue is a heat resistant glue.

6. The LED light source device calibration method according to claim 4, wherein the LED holder (4) has a placement hole;

in the step S104, after the PCB (32) and the LED support (4) are pre-bonded, the LED light emitting chip (31) passes through the placing hole.

In the step S105, the PCB (32) is attached to the upper end surface of the lamp adjusting base, and the LED bracket (4) is away from the upper end surface of the lamp adjusting base.

7. The LED light source device calibration method according to any one of claims 1 to 6, further comprising, after the step S111:

step S113, after a first time interval, judging whether the calibrated LED light-emitting chip (31) is attached to the LED reference line; if the calibrated LED light-emitting chip (31) is attached to the LED reference line, executing a step S115;

and S115, standing the calibrated LED light-emitting chip (31) and the PCB (32) at least for a second time interval to cure the calibrated LED light-emitting chip (31) and the PCB (32).

8. An optical bench, comprising:

a plurality of LED light source devices calibrated using the method of any one of claims 1-7.

9. A DLP projector, comprising:

the light engine of claim 8.