CN2891002Y - Improved three-lens reflective LCD projector capable of automatically aligning pixels - Google Patents
Improved three-lens reflective LCD projector capable of automatically aligning pixels Download PDFInfo
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- CN2891002Y CN2891002Y CN200620039536.5U CN200620039536U CN2891002Y CN 2891002 Y CN2891002 Y CN 2891002Y CN 200620039536 U CN200620039536 U CN 200620039536U CN 2891002 Y CN2891002 Y CN 2891002Y
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Abstract
The utility model provides a modified auto align three-lens full digital reflex projector, is characterized is that the projector is provided with a control governor mechanism for auto-aligning the projection pixels of three projection lens, which comprises a prolate axis connecting three projection lens, a carriage for supporting the prolate axis, at least a optical boundary CCD for testing the overhead projectual of three projection lens, two stepping motors for driving both sides projection lens move, and at least a control circuit. Wherein, the input end of the control circuit is connected with the CCD to receive the detection signal and the output is connected with the stepping motors to control the action. As adding the control governor mechanism for auto-aligning the projection pixels of three projection lens, the utility model is greatly convenient for the use for workers, ensures the projection results of the projector so as to make the overhead projectual keep clear all the time.
Description
Technical field
The utility model relates to a kind of projector, relates in particular to the automatic snap to pixels three-lens reflective liquic crystal display of a kind of modified (LCOS) projector.
Background technology
Projector is widely used in education, commerce and the family.Common projector generally comprises a housing and is arranged on the interior photo engine of housing, circuit board, apparatus for lighting up, light source and corresponding cooling mechanism.According to what of camera lens used in the photo engine, projector can be divided into single-lens projector and tri-lens projector again.Generally all be that the white light that earlier a light source is produced is isolated red, green, blue three coloured light in design, by three liquid crystal light valves three coloured light are modulated respectively, three coloured light after the modulation are handled with diverse ways according to different mining single-lens or the three-lens design.In single-lens projector, be with closing that color component is synthesized and by the single lens projection imaging with three coloured light.In tri-lens projector, be that three coloured light are projected to imaging on the same screen via three different camera lenses respectively.Wherein single-lens projector has the advantages that volume is little, be convenient for carrying, but its back focal length is longer, and camera lens aperture requires to strengthen, and optical modules such as employed camera lens and spectroscope are very high to the requirement of quality, precision, cause cost higher.And tri-lens projector can project big picture in than short distance, and picture brightness and contrast all improve a lot than single-lens projector.
The structure difference of projector's basis optical system wherein can be divided into LCD (Liquid CrystalDisplay liquid crystal board) projector, CRT (Cathode Ray Tube cathode-ray tube (CRT)) projector, DLP (Digital Light Processor digital light transmission processor) projector and LCOS (reflective type silicon-based liquid crystal technology) projector again.
In reflection liquid crystal projector (LCOS projector), be that the switch control unit of transistor as the pixel liquid crystal is made on one deck silicon substrate, silicon substrate (also claiming reflection electrode layer) be positioned at liquid crystal layer below, be used for the various control electrodes of pixel address addressing and interelectrode insulation course be positioned at silicon substrate below, total is the three-dimensional arrangement mode of a 3D.Can not the penetrate through reflective electrode layer from the light of light source, but the electrode layer reflection that is reflected, various structural sheets the stopping below having avoided to light.Therefore, (the aperture ratio in the DLP technology is 88% to adopt the aperture ratio of the liquid crystal board of reflective type silicon-based liquid crystal technology can accomplish 93%, and the aperture ratio of the liquid crystal board of transmission type LCD is 40-60%), therefore, adopt the projector of reflective type silicon-based liquid crystal technology higher, can realize higher brightness output the utilization factor of light source.
Single-lens projector can be made by reflection liquid crystal projector (LCOS projector), also can make tri-lens projector.Three-lens reflective liquic crystal display projector has the advantage of above-mentioned tri-lens projector and reflection liquid crystal projector concurrently.But; three-lens reflective liquic crystal display projector is owing to there are three projection lens; the projector distance of its requirement is certain relatively; in different fields of employment; this projector distance can be restricted and influence; this restriction and influence in some cases can (screen generally be that inconvenience is mobile by the mobile projector machine; for example can utilize fixing metope to make screen usually) solve; but under the other situation; mobile projector chance have any problem (being subjected to environment and attendance's restriction); perhaps clear picture can't be made by the mobile projector machine merely, thereby the drop shadow effect of projector can be influenced.In addition, promptly enable by mobile projector machine snap to pixels, it is also pretty troublesome, time-consuming to operate.Also have the putting in the shadow process of projector, certain accident also may occur and projector be produced move or vibration, cause the projected pixel of three camera lenses uneven, influence drop shadow effect.
Summary of the invention
The purpose of this utility model provides a kind of modified automatic snap to pixels three-lens reflective liquic crystal display projector exactly in order to address the above problem.
The purpose of this utility model is achieved in that the automatic snap to pixels three-lens reflective liquic crystal display projector of a kind of modified, comprises housing and is arranged on the interior photo engine of housing, circuit board, apparatus for lighting up, light source, power supply and corresponding cooling mechanism; Described photo engine comprises illumination optics unit, coloured light dissociated optical unit, electrooptical modulation unit and projecting optical unit; Described electrooptical modulation unit comprises three groups of electro-optic modulation arrangement, and every group of electro-optic modulation arrangement comprises a polarizing prism and a reflective type silicon-based liquid crystal plate; Described projecting optical unit comprises three projection lens, be characterized in, the regulating and controlling mechanism that also comprises the projected pixel of three projection lens that are used for aliging automatically, this regulating and controlling mechanism comprises a major axis that three projection lens are chained together, a bracing frame that is used to support above-mentioned major axis, the charge-coupled image sensor of the optical boundary of at least one projected image that is used to detect three projection lens, two are used for driving respectively stepper motor and at least one control circuit that the both sides projection lens moves, the input end of control circuit connects charge-coupled image sensor and receives its detection signal, and the output terminal of control circuit connects its action of step motor control.
In described three projection lens, the projection lens in the middle of being positioned at is fixed on the described major axis, and two projection lens that are positioned at both sides are movably connected in respectively can be along this major axis move left and right on the described major axis.
Described charge-coupled image sensor is one, and this charge-coupled image sensor is arranged on a side of projector, and described control circuit is one, and the output terminal of this control circuit connects two its actions of step motor control respectively.
Described charge-coupled image sensor is two, two charge-coupled image sensors are separately positioned on the both sides of projector, described control circuit is two, the input end of two control circuits connects two charge-coupled image sensors respectively, and the output terminal of two control circuits connects two its actions of step motor control respectively.
The automatic snap to pixels three-lens reflective liquic crystal display projector of a kind of modified of the utility model owing to set up be used for aliging the automatically regulating and controlling mechanism of projected pixel of three projection lens, greatly facilitate the use of staff to projector, and guaranteed the drop shadow effect of projector, it is clear that projected image can be remained.
Description of drawings
Fig. 1 is the photo engine in the automatic snap to pixels three-lens reflective liquic crystal display projector of a kind of modified of the utility model and the structural principle synoptic diagram of regulating and controlling mechanism.
Embodiment
The automatic snap to pixels three-lens reflective liquic crystal display projector of a kind of modified of the utility model comprises housing and is arranged on photo engine, circuit board, apparatus for lighting up, light source, power supply and the corresponding cooling mechanism in the housing and the regulating and controlling mechanism of the projected pixel of three projection lens that are used for aliging automatically.The structural principle of photo engine wherein and regulating and controlling mechanism as shown in Figure 1, it comprises the regulating and controlling mechanism 5 of illumination optics unit 1, coloured light dissociated optical unit 2, electrooptical modulation unit 3, projecting optical unit 4 and projection lens.Electrooptical modulation unit 3 wherein comprises three groups of electro-optic modulation arrangement 31,32,33, projecting optical unit comprises three projection lens 41,42,43, three groups of electro-optic modulation arrangement 31,32,33 are separately positioned on the isolated red, green, blue three coloured light roads, coloured light dissociated optical unit, and three projection lens 41,42,43 are separately positioned on the emitting light path of three groups of electro-optic modulation arrangement.Wherein, three groups of electro-optic modulation arrangement (31,32,33) respectively comprise a polarizing prism (311,321,331) and a reflective type silicon-based liquid crystal plate (312,322,332), three polarizing prisms 311,321,331 to be separately positioned on coloured light dissociated optical unit isolated red, green, on the blue three color light road, three reflective type silicon-based liquid crystal plates 312,322,332 are separately positioned on the back of three polarizing prisms, and respectively perpendicular to red, green, the incident direction of blue three color light, i.e. three projection lens 41,42,43 and three reflective type silicon-based liquid crystal plates 312,322,332 are separately positioned on three polarizing prisms 311,321,331 both sides, front and back.Regulating and controlling mechanism 5 comprises major axis 51, bracing frame 52, charge-coupled device (CCD) 53, stepper motor 54 and control circuit 55.Major axis 51 is chained together three projection lens 41,42,43, in three projection lens, projection lens 42 in the middle of being positioned at is fixed on the major axis 51, and two projection lens 41,43 that are positioned at both sides are movably connected in respectively can be along this major axis move left and right on the major axis 51.Bracing frame 52 is installed on the housing of projector and is used to support major axis 51.Charge-coupled image sensor 53 also is installed on the housing of projector, is used to detect the optical boundary of the projected image of three projection lens.As required, charge-coupled image sensor 53 can be set to two or one.When adopting one, this charge-coupled image sensor is arranged on a side of projector, and when using two, two charge-coupled image sensors are separately positioned on the both sides of projector.Situation for two of uses embodiment illustrated in fig. 2.Two stepper motors 54 are installed in respectively on the housing of projector, and link to each other with projection lens 41,43 transmissions of both sides respectively, are used for driving respectively the projection lens 41,43 of both sides along the major axis move left and right.Control circuit 55 also can be set to one or two, is used to receive the detection signal of charge-coupled image sensor, and converts the action of control signal control step motor to.A control circuit and a charge-coupled image sensor are used, and two control circuits are used with two charge-coupled image sensors respectively.When adopting a control circuit, the output terminal of this control circuit connects two stepper motors respectively.When control circuit was two, the input end of two control circuits connected two charge-coupled image sensors respectively, and the output terminal of two control circuits connects two stepper motors respectively.Shown in Fig. 1,6 is light source, and 7 is screen.
Claims (4)
1, the automatic snap to pixels three-lens reflective liquic crystal display projector of a kind of modified comprises housing and is arranged on the interior photo engine of housing, circuit board, apparatus for lighting up, light source, power supply and corresponding cooling mechanism; Described photo engine comprises illumination optics unit, coloured light dissociated optical unit, electrooptical modulation unit and projecting optical unit; Described electrooptical modulation unit comprises three groups of electro-optic modulation arrangement, and every group of electro-optic modulation arrangement comprises a polarizing prism and a reflective type silicon-based liquid crystal plate; Described projecting optical unit comprises three projection lens, it is characterized in that: the regulating and controlling mechanism that also comprises the projected pixel of three projection lens that are used for aliging automatically, this regulating and controlling mechanism comprises a major axis that three projection lens are chained together, a bracing frame that is used to support above-mentioned major axis, the charge-coupled image sensor of the optical boundary of at least one projected image that is used to detect three projection lens, two are used for driving respectively stepper motor and at least one control circuit that the both sides projection lens moves, the input end of control circuit connects charge-coupled image sensor and receives its detection signal, and the output terminal of control circuit connects its action of step motor control.
2, the automatic snap to pixels three-lens reflective liquic crystal display projector of modified according to claim 1, it is characterized in that: in described three projection lens, projection lens in the middle of being positioned at is fixed on the described major axis, and two projection lens that are positioned at both sides are movably connected in respectively can be along this major axis move left and right on the described major axis.
3, the automatic snap to pixels three-lens reflective liquic crystal display projector of modified according to claim 1, it is characterized in that: described charge-coupled image sensor is one, this charge-coupled image sensor is arranged on a side of projector, described control circuit is one, and the output terminal of this control circuit connects two its actions of step motor control respectively.
4, automatic alignment focal length pixel three-lens full-digital reflective projector according to claim 1, it is characterized in that: described charge-coupled image sensor is two, two charge-coupled image sensors are separately positioned on the both sides of projector, described control circuit is two, the input end of two control circuits connects two charge-coupled image sensors respectively, and the output terminal of two control circuits connects two its actions of step motor control respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620039536.5U CN2891002Y (en) | 2006-02-17 | 2006-02-17 | Improved three-lens reflective LCD projector capable of automatically aligning pixels |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620039536.5U CN2891002Y (en) | 2006-02-17 | 2006-02-17 | Improved three-lens reflective LCD projector capable of automatically aligning pixels |
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| CN2891002Y true CN2891002Y (en) | 2007-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200620039536.5U Expired - Fee Related CN2891002Y (en) | 2006-02-17 | 2006-02-17 | Improved three-lens reflective LCD projector capable of automatically aligning pixels |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458409B (en) * | 2008-12-17 | 2012-10-10 | 康佳集团股份有限公司 | Liquid crystal display device and method for improving display effect of LCD |
| CN112859496A (en) * | 2021-03-22 | 2021-05-28 | 青岛海信激光显示股份有限公司 | Projection imaging system |
-
2006
- 2006-02-17 CN CN200620039536.5U patent/CN2891002Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458409B (en) * | 2008-12-17 | 2012-10-10 | 康佳集团股份有限公司 | Liquid crystal display device and method for improving display effect of LCD |
| CN112859496A (en) * | 2021-03-22 | 2021-05-28 | 青岛海信激光显示股份有限公司 | Projection imaging system |
| CN112859496B (en) * | 2021-03-22 | 2022-08-16 | 青岛海信激光显示股份有限公司 | Projection imaging system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |