CN206573842U

CN206573842U - Dmd chip protection combination unit

Info

Publication number: CN206573842U
Application number: CN201621235543.2U
Authority: CN
Inventors: 马赛
Original assignee: Sichuan Changhong Electric Co Ltd
Current assignee: Sichuan Changhong Electric Co Ltd
Priority date: 2016-11-17
Filing date: 2016-11-17
Publication date: 2017-10-20
Anticipated expiration: 2026-11-17

Abstract

The utility model is related to a kind of dmd chip protection combination unit; particularly a kind of dmd chip applied to DLP projection arts protects combination unit; including fixed seat, anti-dazzling screen, heat insulating mattress and dmd chip; the anti-dazzling screen is located between fixed seat and dmd chip, and the heat insulating mattress is located between anti-dazzling screen and dmd chip.Combination unit is protected using the dmd chip of the application, the undesired light for being irradiated to DMD lens perimeters can be effectively reduced, rationally and effectively control DMD operating temperature, reaching makes the purpose of its long-term stable operation；Simultaneously using the anti-dazzling screen blacked, unnecessary diffusing reflection light beam can be absorbed, moreover it is possible to the speckle effectively launched in reduction optical system, reduce dark picture brightness, system contrast can be effectively improved, have further lifting to system optics performance.

Description

Dmd chip protection combination unit

Technical field

The utility model is related to a kind of dmd chip protection combination unit, particularly a kind of to be applied to DLP projection arts Dmd chip protection combination unit.

Background technology

DLP technologies are a kind of original creation, the solution that digital light source is shown are produced using optical semiconductor.It is main at present To be applied to various product (such as giant-screen DTV, company/family/specialized conference projector and digital camera.Meanwhile, This solution is also the full ripe independent technique used by global numerous electronic enterprises.

DLP technological core is DMD (digital Micromirror Device) chip, and DMD is in semiconductor chip In the matrix that upper arrangement one is made up of micromirror (accurate, miniature speculum), each micromirror control projected picture A pixel.The quantity of micromirror is consistent with the resolution ratio of projected picture, 800 × 600,1024 × 768,1280 × 720 Hes 1920x 1080 is some common DMD size, and 4K dmd chips new at present have been listed.

DMD operation principle is exactly that the light needed is reflected by micro-mirror device, need not while being absorbed by light absorber Light realize the projection of image.The spot size being irradiated on dmd chip is produced by ray machine front end light source and optical system, Spot size has an accuracy rating, and hot spot is less than normal, and image border variegation or brightness can be caused up to standard, so hot spot design at present Will be more bigger-sized than DMD minute surface, unnecessary light can be absorbed so as to cause dmd chip self-temperature to rise by DMD, if DMD operating temperatures exceed will reduce chip service life using specification, so as to cause some DLP products to there is DMD reliabilities Risk, market initial failure ratio is higher.

Utility model content

Technical problem to be solved in the utility model, which is to provide one kind, can effectively prevent dmd chip temperature from raising, and show Write the service life for improving DMD, it is to avoid the dmd chip protection combination unit of DMD bad point failure phenomenons.

The dmd chip used to solve above-mentioned technical problem the utility model protects combination unit, including fixed seat, screening Mating plate, heat insulating mattress and dmd chip, the anti-dazzling screen be located between fixed seat and dmd chip, the heat insulating mattress be located at anti-dazzling screen and Between dmd chip.

It is further that the anti-dazzling screen is copper metal anti-dazzling screen.

It is further that the fixed seat is aluminium alloy fixed seat.

It is further that the heat insulating mattress is high-temperature-resisting silicon rubber heat insulating mattress.

The beneficial effects of the utility model are：Combination unit is protected using the dmd chip of the application, photograph can be effectively reduced The undesired light of DMD lens perimeters is mapped to, DMD operating temperature is rationally and effectively controlled, reaching makes its long-term stable operation Purpose；Simultaneously using the anti-dazzling screen blacked, unnecessary diffusing reflection light beam can be absorbed, moreover it is possible to effectively launched in reduction optical system Speckle, reduce dark picture brightness, system contrast can be effectively improved, have further lifting to system optics performance.

Brief description of the drawings

Fig. 1 is the structural representation of the application；

Parts, position and numbering in figure：Fixed seat 1, anti-dazzling screen 2, heat insulating mattress 3, dmd chip 4.

Embodiment

The utility model is described in further detail below in conjunction with the accompanying drawings.

As shown in figure 1, of the present utility model including fixed seat 1, anti-dazzling screen 2, heat insulating mattress 3 and dmd chip 4, the shading Piece 2 is located between fixed seat 1 and dmd chip 4, and the heat insulating mattress 3 is located between anti-dazzling screen 2 and dmd chip 4.The present apparatus is main It is made up of anti-dazzling screen 2, the two parts of heat insulating mattress 3.Wherein anti-dazzling screen 2 can effectively be absorbed using the efficient light absorption, Heat Conduction Material that black DMD minute surfaces periphery light beam, and heat energy is changed into, while also heat energy quickly can be conducted as early as possible to the fixed seat 1 of dmd chip 4；It is heat-insulated Pad 3 mainly uses soft, high temperature resistant, heat-barrier material, is positioned between anti-dazzling screen 2 and dmd chip 4, and effectively isolation anti-dazzling screen 2 is produced Raw heat energy controls and reduced the purpose of the temperature of dmd chip 4 to the heat transfer of dmd chip 4 so as to reach.After the present apparatus, The undesired light for being irradiated to DMD lens perimeters can be effectively reduced, DMD operating temperature is rationally and effectively controlled, reaching makes it The purpose of long-term stable operation；Simultaneously using the anti-dazzling screen 2 blacked, unnecessary diffusing reflection light beam can be absorbed, moreover it is possible to effectively drop The speckle launched in low optical system, reduces dark picture brightness, can effectively improve system contrast, have to system optics performance Further lifting.

The anti-dazzling screen 2 is copper metal anti-dazzling screen 2.Anti-dazzling screen 2 uses copper metal material, and blackening process, the heat conduction of copper Coefficient is 398W/m.K, can quickly transmit heat, and the blackening process of anti-dazzling screen 2 is, in order to absorb DMD lens perimeter light beams, and to turn Turn to heat energy.

The fixed seat 1 is aluminium alloy fixed seat 1.The main purpose of aluminium alloy fixed seat 1 is used for fixed DMD positions, And the effect for helping anti-dazzling screen 2 to radiate.

The heat insulating mattress 3 is high-temperature-resisting silicon rubber heat insulating mattress 3.Wherein high temperature resistant refers to bear up to more than 250 DEG C Temperature.

Embodiment one

DMD fixed seats 1 in this example, using aluminum alloy material, main purpose is fixed DMD positions, and helps anti-dazzling screen 2 to dissipate The effect of heat.

DMD is Ti moneys dmd chip 4 in this example.

Anti-dazzling screen 2 uses copper metal material, and blackening process in this example, and the thermal conductivity factor of copper is 398W/m.K, can be fast Speed transmission heat, the blackening process of anti-dazzling screen 2 is, in order to absorb DMD lens perimeter light beams, and to be converted into heat energy.

Heat insulating mattress 3 uses high-temperature-resisting silicon rubber material in this example, and heatproof is up to more than 250 DEG C.

Dress is combined by not protecting the dmd chip 4 of combination unit to be protected with this example using DMD using DMD in the prior art The dmd chip 4 postponed carries out control experiment.DMD surface temperatures are gathered by thermocouple collection respectively and recorded.

When there is no this example DMD protection combination units, when DLP system works, strong illumination to DMD surfaces, most of light Beam is concentrated in the range of DMD minute surfaces, but still has segment beam to be radiated at mirror edges.

Increase after this example DMD protection combination units, when DLP system works, most of light beam exposes to DMD surfaces, many Besides enclose light beam and be blocked piece 2 and stop, reduce the beam energy for exposing to DMD minute surfaces periphery.

Reduced temperature test data can see：Increase after this example DMD protection combination units, DMD surface temperatures have bright Aobvious reduction, the working environment of dmd chip 4 is improved.

Embodiment two

Ray machine production process light path debugging step, DMD beam angle correcting process.It can not be accurately aimed at before light beam correction DMD minute surfaces, have certain position skew, it is necessary to which manually change mirror angle is modified on horizontally or vertically position.Repair During just, strong beam has the possibility for exposing to DMD minute surfaces periphery, and this is tested：

DMD fixed seats 1 are aluminum alloy material in this example, and main purpose is fixed DMD positions, and helps anti-dazzling screen 2 to radiate Effect.

DMD is Ti moneys dmd chip 4 in this example.

DMD surface temperatures are gathered by thermocouple and recorded, when protecting combination unit without this example DMD, are started shooting several seconds Interior DMD test points temperature is drastically raised, more than 100 DEG C, beyond the use specification of chip；

Increase after this example DMD protection combination unit, DMD test points temperature keeps stable after start, in specification limit it Interior, DMD can be worked with long-time stable.

Claims

1.DMD chips protection combination unit, it is characterised in that：Including fixed seat (1), anti-dazzling screen (2), heat insulating mattress (3) and DMD cores Piece (4), the anti-dazzling screen (2) is located between fixed seat (1) and dmd chip (4), the heat insulating mattress (3) positioned at anti-dazzling screen (2) and Between dmd chip (4).

2. dmd chip protection combination unit as claimed in claim 1, it is characterised in that：The anti-dazzling screen (2) hides for copper metal Mating plate (2).

3. dmd chip protection combination unit as claimed in claim 1, it is characterised in that：The fixed seat (1) is solid for aluminium alloy Reservation (1).

4. dmd chip protection combination unit as claimed in claim 1, it is characterised in that：The heat insulating mattress (3) is high temperature resistant silicon Rubber heat insulating (3).