DMD component, DLP light machine and DLP projection device

Abstract

The invention relates to the technical field of optics and projection, and particularly relates to a DMD component, a DLP light machine and a DLP projection device. The DMD component comprises a base with an accommodation groove on one side, a driving plate, a DMD chip which is arranged in the accommodation groove, a supporting plate and a fixation frame with an embedded through hole. A number of elastic hooks are arranged on the edge of one side of the embedded through hole. The driving plate is fixedly clamped between the fixation frame and the supporting plate through a fastener. The base is embedded into the embedded through hole from one side, which is close to the driving plate, of the fixation frame, and the elastic hooks on the other side hook the edge of the inner wall of the accommodation groove and contact the surface of the DMD chip. According to the invention, the accuracy and stability of the contact between the DMD chip and the contact of the driving plate are ensured; the quality of the final projection screen is improved; the difficulty of disassembly and assembly and the requirement on the size of associated structural members are reduced; the efficiency of processing and production is improved; and the production cost is reduced.

Description

[0001] 【Technical field】 [0002] The present invention relates to the technical field of optics and projection, in particular to a DMD component, a DLP optical machine and a DLP projection device. [0003] 【Background technique】 [0004] DLP (Digital Light Procession, digital light processing) projectors have the characteristics of high native contrast, miniaturization of machines, and closed optical paths, which make them more and more favored by users. Among them, DLP projectors use DMD ( Digtal Micromirror Device (Digital Micromirror Device) chip is used as an imaging device to realize a projection technology of projected images by adjusting the reflected light. [0005] In the prior art, the connection between the DMD and the drive board is a multi-contact connection; please refer to the appendix. figure 1 , The traditional contact between the DMD chip and the driver board is mainly achieved by locking the driver board with screws, and then the driver board presses the co...

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Problems solved by technology

[0007] 1. Due to the one-to-one correspondence between the multiple contacts of the driver board and the DMD chip, it is difficult to ensure the fixing accuracy in this way, and there are cases where the contacts are not corresponded to each other, and the requirements for the size and installation methods of related structural parts are relatively high;

[0008] 2. The multiple contacts of the driver board and the DMD chip need to be tightly attached to each other, but because the flatness of the DMD chip itself is difficult to guarantee, using this method of fixing may lead to uneven force and poor contact of local contacts, and due to The back-end heat sink is large in size and weight. There is only a gap between the protruding heat sink and the back of the DMD chip to fill with thermal paste. It is easy for the heat sink to exert a thrust on the DMD chip due to the action of the heat sink or the force involved. , resulting in the separation of the DMD chip and the contacts of the driver board and poor contact, and then due to poor contacts, dark areas appear in the projection image display, and the projection screen cannot be displayed normally, requiring repeated debugging by production line workers;

[0009] 3. The DMD chip and the driver board are locked by screws. During the drop test and vibration test, the axial displacement between the DMD chip and the driver board is prone to occur, which makes the contact stability lower;

[0010] 4. The DMD chip and the driver board are not relatively fixed, and it is inconvenient to assemble and disassemble

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