CN101651728B - Projection apparatus and projection method based on liquid crystal display screen of mobile phone - Google Patents
Projection apparatus and projection method based on liquid crystal display screen of mobile phone Download PDFInfo
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- CN101651728B CN101651728B CN 200910091991 CN200910091991A CN101651728B CN 101651728 B CN101651728 B CN 101651728B CN 200910091991 CN200910091991 CN 200910091991 CN 200910091991 A CN200910091991 A CN 200910091991A CN 101651728 B CN101651728 B CN 101651728B
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Abstract
The invention discloses a projection apparatus based on a liquid crystal display screen of a mobile phone, comprising a light source assembly embedded in the liquid crystal display screen (LCD) of the mobile phone and an optical assembly arranged outside the LCD of the mobile phone, wherein the light source assembly is used for emitting high-lightened parallel light, and the optical assembly is used for projecting audio-visual pictures displayed on the LCD of the mobile phone as images. The invention further discloses a projection method based on the liquid crystal display screen of the mobile phone, comprising the following steps: after emitting the high-lightened parallel light by the light source assembly, projecting the audio-visual pictures displayed on the LCD of the mobile phone as images through the optical element, wherein the focus used for projecting as images is equal to a projection distance/a width of the projection. By using the apparatus and the method, the projection function can be realized by the mobile phone with low cost, simple structure, easy operation and convenient adaptation to the mobile phone.
Description
Technical field
The present invention relates to have the technical field of the mobile phone of projecting function, relate in particular to a kind of projector equipment and projecting method based on liquid crystal display screen of mobile phone (LCD, Liquid Crystal Display Panel).
Background technology
The mobile phone of projecting function has appearred having at present, U.S. Patent number is 6489934, denomination of invention has disclosed a kind of existing mobile phone with projecting function for " Cellular phone with builtin optical projector for display of data ", this mobile phone comprises: be positioned at interior of mobile phone, be used for realizing the mobile phone unit of normal cell-phone function; And be positioned at interior of mobile phone, be used for realizing the projecting cell of projecting function; And projecting cell is made of light source, image display, optical module.The operation principle of this mobile phone is: be responsible for playing audio/video file by mobile phone unit, and send video-audio signal to projecting cell; By image display built-in in the projecting cell, show video/audio image such as miniature LCD display; Finally video/audio image is launched in conjunction with optical module by the light source in the projecting cell, to realize the projecting function of mobile phone.
Adopt existing mobile phone with projecting function, its weak point is: on the one hand, realize the projecting function of mobile phone, must be on the basis of original mobile phone, and in the interior of mobile phone unit that independently adds drop shadow, newly added equipment must increase the input of cost.And projecting cell is made of light source, image display, optical module, and function is complicated, is unfavorable for operation; On the other hand, because the mobile phone projection unit is still only at the experimental stage at present, do not have ripe product to occur, can't reach the best-fit effect when suitable with mobile phone, and the size of existing projecting cell also can't satisfy the demand of mobile phone miniaturization.At present in the urgent need to a kind of mobile phone with projecting function, can satisfy the saving input cost, simple in structure easy to operate, be convenient to the needs suitable with mobile phone.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of projector equipment based on LCD of mobile phone and projecting method, can realize projecting function by mobile phone, can satisfy simultaneously the saving input cost, simple in structure easy to operate, be convenient to the needs suitable with mobile phone.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of projector equipment based on liquid crystal display screen of mobile phone, this equipment comprises the mobile phone of supporting that audio/video file is play, and this equipment also comprises: at the embedded light source part in LCDs (LCD) position of described mobile phone, at the external optics in the LCD position of described mobile phone; Wherein,
Described light source part is used for sending highlighted directional light;
Described optics, for the audio-visual picture projection imaging on the LCD that will be presented at mobile phone, described optics comprises the convex lens with magazine; Wherein, realize the width of the focal length=projector distance of the described convex lens that described projection imaging is adopted/projection.
Wherein, described light source part specifically comprises: light-emitting diode (LED) cold light panel; Described LED cold light panel is used for sending described highlighted directional light.
Wherein, the optional in advance one assembling of LCD with described mobile phone of described LED cold light panel; The thickness of described LED cold light panel needs to satisfy the requirement that is installed in the interior of mobile phone LCD back side and does not affect mobile phone basic structure.
Wherein, the distance between the LCD of described convex lens and described mobile phone is: greater than one times of described focal length, and less than two times of described focal lengths.
Wherein, described equipment also comprises: the projection diverter switch, and for the LCD driver module of control interior of mobile phone, normally use pattern and mobile phone to use between the projection mode at mobile phone and switch;
Described LCD driver module is used for normally using under the state of pattern at mobile phone, drives LED light-emitting particles on the LCD that is positioned at described mobile phone and carries out luminously, and shows described audio-visual picture at the LCD of described mobile phone; Under described projection diverter switch control, enter under the state of mobile phone use projection mode, extinguishing described LED light-emitting particles and driving described LED cold light panel carries out luminous, control simultaneously the processing of reversing of described audio-visual picture, and by described convex lens projection imaging with magazine, obtain the projection of erect image.
A kind of projecting method based on liquid crystal display screen of mobile phone, at the embedded light source part in the LCD position of described mobile phone, and external convex lens with magazine, the method also comprises: after light source part sends highlighted directional light, with the audio-visual picture that is presented on the LCD of mobile phone, by the convex lens projection imaging with magazine; Wherein, realize the width of the focal length=projector distance of the described convex lens that described projection imaging is adopted/projection.
Wherein, when realizing described projection imaging, the object distance of the described convex lens with magazine of described audio-visual picture distance is: greater than one times of described focal length, and less than two times of described focal lengths.
Wherein, the method further comprises: under the control of projection diverter switch, the LCD driver module of interior of mobile phone normally uses between pattern and the mobile phone use projection mode at mobile phone and switches.
Wherein, described light source part specifically comprises: the LED cold light panel, and described LED cold light panel is used for sending described highlighted directional light; When mobile phone normally used pattern, described LCD driver module drove LED light-emitting particles on the LCD that is positioned at mobile phone and carries out luminously, and shows described audio-visual picture at the LCD of mobile phone;
When described LCD driver module enters mobile phone use projection mode under described projection diverter switch control, the LCD driver module extinguishes described LED light-emitting particles and the driving LED cold light panel carries out luminous, control simultaneously the processing of reversing of described audio-visual picture, and by the convex lens projection imaging with magazine, obtain the projection of erect image.
Equipment of the present invention comprises the mobile phone of supporting that audio/video file is play, and this equipment also comprises: at the embedded light source part in the LCD position of mobile phone, at the external optics in the LCD position of mobile phone.Wherein, light source part is used for sending highlighted directional light.Optics is for the audio-visual picture projection imaging on the LCD that will be presented at mobile phone; Wherein, realize the width of focal length=projector distance that projection imaging adopts/projection.
Adopt the present invention, light source part is inserted the back side of interior of mobile phone LCD position; The external LCD position at mobile phone of optics is outside, and the built-in like this and external deconsolidation process that combines can reduce design complexities.And, make light source part have the integrated in advance possibility of assembling with interior of mobile phone LCD, be beneficial to the attenuating manufacturing cost, simplify manufacturing process.In addition, optics is external in outer handset, will launch by optics at the audio-visual picture that LCD shows by existing LCD of mobile phone, is different from prior art and adopts extra LCD to show audio-visual picture, has greatly saved input cost.And, optics is external, also is convenient to adaptive with mobile phone, is different from prior art and adopts optical module in the embedded in mobile phone projecting cell, be not subjected to the restriction of mobile phone size pattern, only need external outside the getting final product of LCD of playing mobile phone at any a support audio/video file.
Description of drawings
Fig. 1 is projection theory figure;
Fig. 2 is the structure assembling schematic diagram of present device;
Fig. 3 is main modular schematic diagram corresponding to present device.
Embodiment
Basic thought of the present invention is: the mobile phone that projector equipment is play based on any a existing support audio/video file, and realize projection imaging by the light source part embedded in the LCD position of mobile phone and at the external optics in the LCD position of mobile phone.
Be described in further detail below in conjunction with the enforcement of accompanying drawing to technical scheme.
A kind of projector equipment based on LCD of mobile phone, this projector equipment comprises: support the mobile phone that audio/video file is play, this equipment also comprises: the embedded light source part and at the external optics in the LCD position of mobile phone in the LCD position of mobile phone.Wherein, light source part is used for sending highlighted directional light.Optics is for the audio-visual picture projection imaging on the LCD that will be presented at mobile phone; Wherein, realize the width of focal length=projector distance that projection imaging adopts/projection.
Here, supporting the mobile phone that audio/video file is play, is the existing any a mobile phone that can support that audio/video file is play, and this interior of mobile phone comprises can realize normal cell-phone function and all parts of supporting the audio/video file playing function.Such as, all parts of this interior of mobile phone can comprise: bluetooth module, power amplifier module, audio-frequency module, Mike, receiver interface, speaker interface, earphone interface, memory, keyboard, system connector, master chip, transmitter module, receiver module, duplexer, frequently comprehensive module, power supply and charge management module, battery, LCD driver module, LCD module etc.
Here, light source part specifically comprises: light-emitting diode (LED, Light Emitting Diode) cold light panel; This LED cold light panel is used for sending highlighted parallel high light.
Here, the optional LCD with mobile phone of LED cold light panel in advance one assemble.The thickness of LED cold light panel needs to satisfy the requirement that is installed in the interior of mobile phone LCD back side and does not affect mobile phone basic structure.
Here, optics specifically comprises: with the convex lens of magazine.Distance between the LCD of these convex lens and mobile phone is: greater than one times of described focal length, and less than two times of described focal lengths., greater than one times of described focal length, and also can be understood as less than the requirement of two times of described focal lengths herein: with the convex lens of magazine, the degree of depth of its magazine.
Here, equipment also comprises: the projection diverter switch, be used for the existing LCD driver module of control interior of mobile phone, and normally use pattern and mobile phone to use between the projection mode at mobile phone and switch.
For the LCD driver module, the LCD driver module is used for normally using under the state of pattern at mobile phone, driving be positioned at LED light-emitting particles on the LCD of mobile phone carry out luminous, and when the LCD of mobile phone shows mobile phone normal play audio/video file shown audio-visual picture.Use this LED particle to throw light on when wherein, the user uses mobile phone under normally use pattern of mobile phone.
The LCD driver module is entering under the control of projection diverter switch under the state of mobile phone use projection mode, extinguish the LED light-emitting particles and the driving LED cold light panel carries out luminous, simultaneously LCD driver module control is to the processing of reversing of the upper audio-visual picture that shows of the LCD of mobile phone, and by the external convex lens projection imaging with magazine, obtain the projection of erect image.
It is to be noted: according to the projection imaging principle, the erect image of distance between one times of focal length of convex lens and two times of focal lengths is by obtaining the projection of reverted image after the convex lens projection; And reverted image obtains the projection of erect image after by the convex lens projection.Just because of the audio-visual picture that shows at LCD might be reverted image, therefore, need LCD driver module control to the processing of reversing of the upper audio-visual picture that shows of the LCD of mobile phone, so just can obtain the projection of erect image.
In sum, the present invention mainly comprises following content:
The technical problem to be solved in the present invention is to rely on original handset structure basis, utilizes the LCD of mobile phone display screen, by built-in light source part, cooperates external optics, reaches the final effect of projection imaging.
The present invention is by the following technical solutions: projector equipment comprises this main part of mobile phone, also comprises: light source part and optics.And light source part is built in the back side of LCD of mobile phone position, and optics is by LCD of mobile phone, and is placed on the outside of LCD of mobile phone position.
Wherein, the mobile phone part, hardware aspect needs to support the broadcast of audio/video file; The software aspect can realize the image inversion function under the control of LCD driver module.Light source part needs to adopt the cold light luminous element that can send highlighted directional light.Can select the LED cold light panel that can send the parallel high light of high brightness.The LCD part need reach certain resolution, and screen display is fine and smooth, and the screen optical texture is penetrating.Optics need satisfy certain focal length.
For realizing the image inversion function, about image inversion, because convex lens imaging principle, if need to obtain erect image, then the projection preimage of LCD demonstration must be processed through counter-rotating.From audio-visual visual displaying principle, because the physiological structure of people's eyes watches the image of per second 10 frames can produce the sense that pauses, if but the film frame number surpasses 20 frame per seconds, and picture is just relatively more smooth.The projection frame number of common film copy is 24 frames, watches the continuity of film to guarantee spectators.That is to say: seem smooth audio-visual image, decompose in fact that to come be the continuous variation picture that per second is put 24 frames.In conjunction with the present invention, because continuous audio-video playing function has been the necessary functions of current main-stream mobile phone, key is that each frame that the image that how decomposition come shows reverses, after the counter-rotating continuously broadcast can satisfy the counter-rotating of projection preimage and process.Image with regard to a frame shows that the handset processes device reads original audio/video file information, and at first video flowing, audio stream analysis, audio stream broadcasts by power amplification, loud speaker by the audio chip decoding is rear; Video flowing is decoded by display module or special-purpose display chip, then passes through the video flowing carry information by the LCD driver module, drives each pixel of LCD display, finally carries out image and shows; If need the original video-audio signal of counter-rotating, decode by display module or special-purpose display chip, re-use special algorithmic function and rebuild video flowing, original erect image stream information is converted to the counter-rotating stream information, drive each pixel of LCD display by the LCD driver module again, realize that finally reverse image shows.
Compared with prior art, the present invention relies on existing handset structure, changing or installing additional on the basis of the least possible equipment, adopt the present invention, can reach with the professional projection module of similar interpolation and obtain the identical effect of mobile phone projection function, all occupy greater advantage aspect productibility and the cost performance.
Below to the present invention's elaboration of giving an example.
Be illustrated in figure 1 as projection theory figure.Projection has utilized convex lens imaging principle, when object distance during less than two times of focal lengths, will become a real image that stands upside down and amplify greater than one times of focal length of convex lens beyond two times of focal lengths of convex lens another side.
Here it should be noted that if the image of launching is erect image, according to convex lens imaging principle, need to use reverted image to show as the projection preimage.
Be illustrated in figure 2 as the structure assembling schematic diagram of present device, provided the structure composition diagram of the projector equipment that the present invention is based on LCD of mobile phone.Among Fig. 2, carried out decomposing indication with 1 to 6 pair of structure based on the projector equipment of LCD of mobile phone, wherein, with 1 indication regular handset; With 2 indication LED cold light panels; With 3 indication LCD; Convex lens with 4 index strip magazines; With 5 indication projection diverter switches; With the LED light-emitting particles of 6 indications for the general normal lighting of mobile phone.
After assembling, LED cold light panel 2, LCD3 are formed by integrated assembling as the mobile phone original paper, with the complete handset structure of 7 indications, complete handset structure 7 cooperates dismountable convex lens 4 with magazine again, jointly forms the final projector equipment 8 based on the LCD of mobile phone display screen.
If when making the LCD3 position between one times of focal length and less than two times of focal lengths, that is to say when with the distance of the convex lens 4 of magazine and LCD3 during between one times of focal length and less than two times of focal lengths, behind the directional light irradiation LCD3 that LED cold light panel 2 sends, by convex lens imaging principle, beyond two times of focal lengths with convex lens 4 another sides of magazine, become a real image that stands upside down and amplify.
In order to launch erect image, need to satisfy three main points: light source part; Convex lens; The screen display of LCD.At first, for light source part, this light source part, to be integrated in the mobile phone such as LED cold light panel 2, dimensional requirement is very strict, and thickness is wanted to satisfy to be installed in the interior of mobile phone LCD display back side and not affect mobile phone basic structure, and first-selection can be sent the LED cold light panel of parallel high light.Secondly, for convex lens, the selection of convex lens need to be satisfied certain focal length.Focal length is by formula: the width of focal length of convex lens distance=projection/projection can obtain.And by this formula as can be known: owing to the degree of depth with this magazine in the convex lens 4 of magazine, it is to have certain requirements between one times of focal length and two focus length, as far as possible miniaturization of matching with mobile phone instructions for use, lightweight, therefore suppose that the focal length of lens is 5cm, then the magazine degree of depth is about 8cm, if want to launch the wide image of 20cm, utilize above-mentioned formula can obtain projector distance, namely the distance between convex lens and image is about 100cm.
Be illustrated in figure 3 as main modular schematic diagram corresponding to present device, among Fig. 3, only for setting forth with the maximally related module of the present invention, other modules that realize the mobile phone normal function are not here given unnecessary details.Fig. 3 has designed emphatically and has cooperated the light source part of projection and the modular structure figure of projection diverter switch.Comprise among Fig. 3: the existing master chip of interior of mobile phone, existing LCD driver module, existing LCD module and newly-increased led module and projection diverter switch.Wherein, the LCD module is from the angle of handset structure, the LCD display that relates to before namely corresponding; Led module is from the angle of handset structure, the LED cold light panel that relates to before namely corresponding.Here, owing to increased led module and projection diverter switch newly, mobile phone need to be realized projecting function, therefore, the function of LCD driver module has had improvement, be: the LCD driver module is entering under the control of projection diverter switch under the state of mobile phone use projection mode, extinguish the LED light-emitting particles and the driving LED cold light panel carries out luminous, simultaneously LCD driver module control is to the processing of reversing of the upper audio-visual picture that shows of the LCD of mobile phone, and by the external convex lens projection imaging with magazine, obtain the projection of erect image.
As seen, the LCD driver module needs the image that LCD shows is reversed simultaneously, just can obtain erect image after the projection, need to carry out the software and hardware functional additive technique at the LCD driver module here.Wherein, at software section, the LCD driver module need to cooperate projection mode that impact is reversed, by just obtaining erect image behind the convex lens; At hardware components, the control of projection diverter switch is accepted in LCD driver module demand motive and controlling projection light source luminescent body and the work of LED light-emitting particles simultaneously.
The user is under the normal operation pattern, and namely mobile phone normally uses the broadcast of adjusting audio/video file under the state of pattern, and after the projection diverter switch was switched, the LCD driver module extinguished the LED light-emitting particles and drives the projection luminous element and carries out luminous.Simultaneously the LCD driver module is to the image processing of reversing, and the external convex lens by with magazine finally obtains the erect image projection.
A kind of projecting method based on LCD of mobile phone, the method comprises: after light source part sends highlighted directional light, with the audio-visual picture that is presented on the LCD of mobile phone, by the optics projection imaging; Wherein, realize the width of focal length=projector distance that described projection imaging adopts/projection.
Here, when realizing projection imaging, audio-visual picture apart from the object distance of convex lens in the optics is: greater than one times of described focal length, and less than two times of described focal lengths.
Here, the method further comprises: under the control of projection diverter switch, the LCD driver module of interior of mobile phone normally uses between pattern and the mobile phone use projection mode at mobile phone and switches.
Here, when mobile phone normally used pattern, the LCD driver module drove LED light-emitting particles on the LCD be positioned at mobile phone and carries out luminously, and shows described audio-visual picture at the LCD of mobile phone.
When the LCD driver module enters mobile phone use projection mode under the control of projection diverter switch, the LCD driver module extinguishes the LED light-emitting particles and the driving LED cold light panel carries out luminous, control simultaneously the processing of reversing of audio-visual picture, and by the convex lens projection imaging with magazine, obtain the projection of erect image.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.
Claims (9)
1. projector equipment based on liquid crystal display screen of mobile phone, this equipment comprises the mobile phone of supporting that audio/video file is play, it is characterized in that this equipment also comprises: at the embedded light source part in LCDs (LCD) position of described mobile phone, at the external optics in the LCD position of described mobile phone; Wherein,
Described light source part is used for sending highlighted directional light;
Described optics, for the audio-visual picture projection imaging on the LCD that will be presented at mobile phone, described optics comprises the convex lens with magazine; Wherein, realize the width of the focal length=projector distance of the described convex lens that described projection imaging is adopted/projection.
2. equipment according to claim 1 is characterized in that, described light source part specifically comprises: light-emitting diode (LED) cold light panel; Described LED cold light panel is used for sending described highlighted directional light.
3. equipment according to claim 2 is characterized in that, in advance one assembling of the LCD of described LED cold light panel and described mobile phone; The thickness of described LED cold light panel needs to satisfy the requirement that is installed in the interior of mobile phone LCD back side and does not affect mobile phone basic structure.
4. according to claim 2 or 3 described equipment, it is characterized in that the distance between the LCD of described convex lens and described mobile phone is: greater than one times of described focal length, and less than two times of described focal lengths.
5. equipment according to claim 4 is characterized in that, described equipment also comprises: the projection diverter switch, and for the LCD driver module of control interior of mobile phone, normally use pattern and mobile phone to use between the projection mode at mobile phone and switch;
Described LCD driver module is used for normally using under the state of pattern at mobile phone, drives LED light-emitting particles on the LCD that is positioned at described mobile phone and carries out luminously, and shows described audio-visual picture at the LCD of described mobile phone; Under described projection diverter switch control, enter under the state of mobile phone use projection mode, extinguishing described LED light-emitting particles and driving described LED cold light panel carries out luminous, control simultaneously the processing of reversing of described audio-visual picture, and by described convex lens projection imaging with magazine, obtain the projection of erect image.
6. projecting method based on liquid crystal display screen of mobile phone, it is characterized in that, at the embedded light source part in the LCD position of described mobile phone, and external convex lens with magazine, the method also comprises: after light source part sends highlighted directional light, with the audio-visual picture that is presented on the LCD of mobile phone, by the convex lens projection imaging with magazine; Wherein, realize the width of the focal length=projector distance of the described convex lens that described projection imaging is adopted/projection.
7. method according to claim 6 is characterized in that, when realizing described projection imaging, the object distance of the described convex lens with magazine of described audio-visual picture distance is: greater than one times of described focal length, and less than two times of described focal lengths.
8. according to claim 6 or 7 described methods, it is characterized in that the method further comprises: under the control of projection diverter switch, the LCD driver module of interior of mobile phone normally uses pattern and mobile phone to use between the projection mode at mobile phone to switch.
9. method according to claim 8 is characterized in that, described light source part specifically comprises: the LED cold light panel, and described LED cold light panel is used for sending described highlighted directional light;
When mobile phone normally used pattern, described LCD driver module drove LED light-emitting particles on the LCD that is positioned at mobile phone and carries out luminously, and shows described audio-visual picture at the LCD of mobile phone;
When described LCD driver module enters mobile phone use projection mode under described projection diverter switch control, the LCD driver module extinguishes described LED light-emitting particles and the driving LED cold light panel carries out luminous, control simultaneously the processing of reversing of described audio-visual picture, and by the convex lens projection imaging with magazine, obtain the projection of erect image.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910091991 CN101651728B (en) | 2009-09-04 | 2009-09-04 | Projection apparatus and projection method based on liquid crystal display screen of mobile phone |
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| CN 200910091991 CN101651728B (en) | 2009-09-04 | 2009-09-04 | Projection apparatus and projection method based on liquid crystal display screen of mobile phone |
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| CN101651728A CN101651728A (en) | 2010-02-17 |
| CN101651728B true CN101651728B (en) | 2013-02-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101859059A (en) * | 2010-07-02 | 2010-10-13 | 余卫华 | Projector for mobile phone and projection mobile phone |
| CN103019004A (en) * | 2012-11-22 | 2013-04-03 | 中兴通讯股份有限公司 | Method and device for projecting by light-compensating lamp of mobile phone |
| CN105426139B (en) * | 2014-09-23 | 2018-08-10 | 联想(北京)有限公司 | A kind of information processing method and electronic equipment |
| CN104618671B (en) * | 2015-01-26 | 2018-12-14 | 联想(北京)有限公司 | A kind of information processing method and electronic equipment |
| CN105962771A (en) * | 2016-07-15 | 2016-09-28 | 安庆市星胜机电设备销售有限公司 | Projection kettle |
| CN105962772A (en) * | 2016-07-15 | 2016-09-28 | 安庆市星胜机电设备销售有限公司 | Electronic projection kettle for homes |
| CN105962768A (en) * | 2016-07-15 | 2016-09-28 | 安庆市星胜机电设备销售有限公司 | Intelligent kettle |
| CN115616846A (en) * | 2021-07-14 | 2023-01-17 | 重庆康佳光电技术研究院有限公司 | Multifunctional display device, display driving method and projection driving method |
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| CN1552056A (en) * | 2000-07-07 | 2004-12-01 | ������ | Cellular phone with built in optical projector for display of data |
| CN101169585A (en) * | 2006-10-25 | 2008-04-30 | 林修平 | Hand-held moving device and method for displaying information |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1552056A (en) * | 2000-07-07 | 2004-12-01 | ������ | Cellular phone with built in optical projector for display of data |
| CN101169585A (en) * | 2006-10-25 | 2008-04-30 | 林修平 | Hand-held moving device and method for displaying information |
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