TWI438547B - Multi-direction transmitting color image projector and the method thereof - Google Patents

Description

Multi-directional transmissive color image projection device and method thereof

The present invention relates to a projection apparatus, and more particularly to a multi-directional transmissive image projection apparatus.

With the continuous expansion of the information and computer market, electronic products are rapidly growing under the trend of light, short, and versatile. Based on the advent of the high-tech era, telecommunications networks and the Internet are emerging industries in recent years, and the development of communication systems with mobile phone integration technology continues to provide users with a more convenient way to obtain information. As a result, communication technology has become a new darling, and the businesses affiliated with communication devices have also flourished due to the convenience of contact needs and information. No matter the Internet, mobile communication devices, personal digital assistants have been filled with the entire living space, and the Internet and communications companies have also introduced new commercial services to help customers transfer their data or obtain to expand the market and services. In terms of electronic components, it is moving toward multi-functional development, such as light and short, multi-functional speed, and communication service providers or information providers must provide diversified, comprehensive and up-to-date information to customers. The currently used handheld communication devices include mobile phones, stock machines, and personal digital assistant systems (or personal electronic organizer devices), commonly known as Personal Digital Assistants (PDAs), which have become increasingly popular in the lives of ordinary people. It has become an indispensable electronic product. The integration system of the above electronic devices is also generally filled with life.

At present, most of the projection devices use a single-source multi-liquid crystal display screen, which is enlarged by a projection lens. However, such a structure requires white light to be transmitted through the beam splitter and the mirror, and the optical mechanism is too complicated to be reduced. Others use DMD wafers, but the cost is too high and requires a color wheel, which is easy to cause mechanical vibration. In addition, the color separation circuit is used, but the same image is divided into three colors to be synthesized, and the projection method is too complicated and requires a color separation circuit.

The first figure is a prior art, using a white light source to direct light to a LCOS (LCD on Silicon) having a color filter through a polarizing beam splitter PBS. After passing through the liquid crystal, the light is reflected by the germanium substrate and then passed through the PBS through the lens. projection. Based on its light path, it is refracted and reflected many times, and most importantly, the color filter will cover a lot of light, causing insufficient light passing rate, causing light to be absorbed or worn, resulting in insufficient brightness, and the polarizing beam splitter PBS will filter out. Half of the polarized polarized light. It consumes electricity by increasing the power of the light source, and generates a large amount of heat due to the white light source.

Referring to the second figure, the current penetrating projector is based on a large volume, is very awkward and is not easy to carry, and also generates high heat and is inefficient, and thus has many defects. The figure shows the optical path of a conventional projection device, which comprises a white light source 22, which filters the two kinds of light through the lens group 24 and the filter devices 30, 32, respectively, and then reflects the light into the crucible through the reflective lens 38, and the remaining color passes through the optical device. 34, 36 are introduced into the crucible, and finally enter the crucible combination through the three-color display element 28, respectively, and are projected through the projection lens 26. And it requires an optical relay lens 40, 42. The invention discloses an optical system of a projection device, which uses a white light source to pass white light into three colors of red, blue and green through a three-component optical lens, and then passes through the display device and is combined by a beryllium. Based on its complex optical system, it contains many filters, reflection devices, etc., so it cannot reduce the body. product.

The optical system employed based on the prior art includes a beam splitter and is equipped with a plurality of lenses, so the degree of volume reduction is limited.

In view of the above, it is an object of the present invention to provide a multi-directional transmissive image projection device that allows the relative positions of a plurality of light sources to be optically identical to each other to reduce optical deviation effects.

A multi-directional transmissive color image projection device comprises: a transmissive color image projection device comprising: a light control unit; a multi-white light source electrically coupled to the light control unit for controlling the independent light sources of the multiple white light sources The light guiding device is configured to guide the light emitted by the plurality of white light sources, wherein the plurality of white light sources are respectively disposed on the side of the light guiding device; and the color display is correspondingly disposed on the light guiding device for displaying the image. The color display is penetrated by the multi-white light source; and the projection lens is correspondingly disposed on the color display for projecting the color image. The light guiding device comprises a dichroic mirror or an X-block; wherein the multi-white light source comprises a laser, a light emitting diode or an organic light emitting element; the color display comprises a plasma display, an organic light emitting display, a field emission display, a liquid crystal display The electronic paper or IMOD display, wherein the transmissive color image projection device can be built in or externally connected to the handheld device, and the handheld device comprises a mobile phone, a notebook, a tablet computer, a media player, a satellite positioning system, and a digital image. Take the device.

An image projection method includes: providing a light control unit and a plurality of white light sources, electrically coupling the light control unit to radiate the independent light of the multiple white light source; providing a light guiding device to facilitate guiding the multiple white light source Each of the lights is directed to a display such that the light passes through the color display; and the projection lens is correspondingly disposed on the color display for projecting the image. Wherein the light guiding device comprises a dichroic mirror or an X-square, wherein the multi-white light source comprises a laser, a light emitting diode or an organic light emitting element; the display comprises a plasma display, an organic light emitting display, and a field emission Display, liquid crystal display.

A light guiding structure comprising: a plurality of light guiding devices arranged on a light path; a plurality of light sources each disposed on a side of the plurality of light guiding devices; wherein the plurality of light guiding devices are configured to guide the plurality of light sources . The plurality of light guiding devices described above comprise a dichroic mirror, an X-square, or a combination thereof. If the number of the plurality of light guiding devices is three, the seven side configurable light sources are included. If the number of the plurality of light guiding devices is four, the nine side configurable light sources are included.

At one point in time, the invention can control only one light source to be turned on, and at the same time, the plurality of light sources are turned on, so that the energy saving effect can be achieved, and the light source portion can reach at least twice the endurance.

The white light and light guiding architecture of the present invention can shorten the optical path of the prior art and improve the brightness. The present invention employs a single display, which saves both display costs over the prior art. In addition to controlling the order of illumination, the light control unit can also control each light individually to achieve multi-stage lumen adjustment.

The above and other objects, features, and advantages of the present invention will become more apparent and understood. To limit the invention.

The invention can also be built in or externally connected to the handheld communication device, including a mobile phone, a personal digital assistant and a smart phone. Handheld wireless communication devices typically include a mobile telephone, a paging device, a personal digital assistant, or the like.

The system architecture of the above wireless communication device generally includes a wireless communication module, which can be applied to a protocol for two-way transmission, and the mobile phone and the personal digital assistant include at least a two-way communication module. In the case of a two-way communication module, the communication protocol used is in the form of a GSM, CDMA, PHS or two-way pager communication protocol. The message provided by the service provider is received via the two-way communication module and decoded by the decoding device to be converted into an identifiable signal. The wireless communication device includes a microprocessor or a central processing unit and a user interface coupled to the microprocessor to facilitate input of the command, and the input may be by touch or voice-activated voice input. The signals received by the two-way communication module are processed by the microprocessor and loaded with data or programs stored in the memory unit, such as comparison protocol, interpretation and judgment. The device can also be applied to GPS, notebook computers or multimedia players.

The third figure shows the transmissive image projection device of the present invention, which comprises a multi-monochromatic light source 1100R, 1100G, 1100B, such as a red light source 1100R, a green light source 1100G, and a blue light source 1100B, which can respectively emit red, green and blue light. The color light control unit 1000 (fourth figure) is electrically coupled to the above-mentioned reference color light sources 1100R, 1100G, and 1100B to sequentially emit at least three colors of light, respectively. In one embodiment, the gray scale display device 1200 is configured to display a gray scale image, which is preferably a gray scale liquid crystal (LCD) display, the substrate of which is transparent to facilitate light penetration. The multi-monochromatic light source 1100 is at least 3 monochromatic light to facilitate the respective emission of blue, green, and red light to facilitate color synthesis. The image on the LCD panel can be The gray scale, and then the monochromatic light, such as blue, green, and red, is sequentially radiated, and the three colors of the three colors respectively penetrate the LCD, so that the red, green, and blue images are enlarged and projected onto the screen through the projection lens 1300. The order of the three-color light can be arbitrarily arranged, and the combination thereof is, for example, an order of blue-green red, blue-red-green, green-red-blue, green-blue-red, blue-red-green, or blue-green-red. A light guiding device 1350 is configured to arrange the respective light sources 1100R, 1100G, and 1100B on three sides of the light guiding device 1350 to facilitate directing the individual light to the display 1200. The light guiding device 1350 described above may be an X-cube or a dichroic mirror. The three-color light source is sequentially radiated based on the above, so that the human eye sees a color image while being in the visual persistence. The multi-monochromatic light source 1100 controls its respective intensity and emission time through the color light control unit 1000, depending on the color information. In order to enhance the light intensity and avoid excessive darkness, the multi-monochromatic light source 1100 may include a white light arrangement to enhance the brightness in addition to the 3 monochromatic light, and the white light may be interspersed in any arrangement of the above three color lights; In order to increase the color, you can also insert yellow light. The image display of the liquid crystal display 1200 is fed by the image signal input unit 1400 (fourth figure). According to the invention, according to the emission of at least three monochromatic lights, and sequentially passing the RGB image through the gray scale display 1200, and passing through the projection lens 1300 to the display screen, it is easy to reduce the volume and simplify the assembly alignment, etc. without the need for defects. Complexity and simplified light mechanism. If a light-emitting element such as an LED, a laser, or an organic light-emitting (EL) element is selected, in addition to reducing the device, the heat dissipation effect is better than that of the light bulb. The display device 1200 described above may also employ an organic light emitting display device, a plasma display device, an electroluminescence display device, or a field emission display device.

In short, the color light control unit 1000 controls the radiation order and intensity of each independent monochromatic light to facilitate mixing into a color. When a single color light is transmitted from the display 1200, the grayscale image on the display 1200 can be formed into a single image. The color image is projected through the projection lens 1300 to sequentially project the images of the monochromatic light, and then the phenomenon of persistence of the human eye is used to visually see the synthesized color image. Therefore, the present invention uses a plurality of monochromatic light sources that do not consume heat as an imaging light source, and uses a single gray scale display 1200 to sequentially pass each monochromatic light through the single gray scale display 1200 to facilitate at least three generations at different times. The image of the color scale is projected onto the screen at different times depending on the projection lens. However, based on the persistence of vision, the human eye thinks that the color light is synthesized at the same time. Therefore, the present invention has the advantages of eliminating the need for a complicated optical mechanism, reducing the cost and simplifying the structure. Furthermore, the present invention does not require the use of the combined light, so that the three-side light source can be disposed on one side. Therefore, the present invention greatly reduces the optical mechanism. In the preferred embodiment, display 1200 includes liquid crystals for displaying grayscale images. When a gray scale image is used, a color filter may not be required in the liquid crystal display device because the color filter causes great shading, resulting in a slight lack of lumens. If you save this filter, you can help with miniaturization, which can improve lumens and reduce power consumption.

The above-mentioned radiation source may be a light-emitting diode (LED), a laser, a single single light source, or a plurality of wires arranged in a line or adjacently, as shown in FIG. 3A or a light-emitting device. The poles are arranged in a matrix, and the three primary colors are repeatedly arranged to form a matrix, as shown in FIG. 3B, which is only shown as an example, and is not intended to limit the present invention, and any number of rows and columns may be configured according to requirements. Insert white or yellow. The above-mentioned radiation source can also be adopted Organic, luminescent, and field emission elements emit red, green, and blue light. The projection lens 1300 is disposed on the display 1200 side, and a display screen can be placed in an appropriate position for projecting imaging. Therefore, the data, files, and video games stored in the handheld communication device, the media player, or the computer memory can be enlarged and projected to the outside through the projection display device. Based on the invention, organic excitation, light radiation, laser and other components are used, which are light and thin, so that they can be integrated into the mobile phone. Referring to the fourth figure, the wireless transmission module 1500 can receive images from the outside and input signals or images to be projected through the image signal input unit 1400. You can also input the signal or image to be projected through the memory card or the flash drive 1600. This can save the inconvenience of carrying the computer. You can also connect the mobile phone through the input interface 1700, such as USB, HDMI, etc. to project the image or information in the mobile phone.

Under the framework of the above embodiments, please refer to FIG. 4A for a modified architecture. The difference between the third and fourth figures is that the present example uses a color display, which can be a liquid crystal color display and a color plasma (PLASMA). A display, a color organic light emitting display (OLED), a color electronic paper display, a color IMOD display (IMOD), a color field emission display (FED). Therefore, the light source can be changed to at least one white light source 1100W, and a homogenizer or a focusing element can be arranged between the white light source 1100W and the display, as shown in the sixth figure. This example can be applied to other numbers of light sources with multiple (square) directions, such as three white light sources 1100W. For example, three white light sources can be controlled to rotate the light source during the visual persistence, and 3 white light is sequentially penetrated through the color display. During the visual persistence, the human eye perceives the color image of the three overlapping lumens, and at a certain time. Light is only turned on for one-third of the time, which saves power consumption. In addition, when the ambient light is weak, the human eye can easily observe the image, so the lumen can be reduced, and only one light source or two light sources can be turned on (simultaneously turned on or turned on sequentially) to save power; When the ambient light is strong, the human eye is not easy to observe the image. In order to improve the lumen, three white light sources can be simultaneously turned on, thus achieving the purpose of controlling the lumen of the multi-segment and multi-directional control light source. The above control can be achieved by the light control unit 1000A. In addition, the light sensor 1000B can be configured to couple the light control unit 1000A to adjust the brightness of the light source according to the brightness of the external environment sensed. If the clock is turned on sequentially, refer to the fourth figure B. The above picture shows the light source rotating in sequence. The following figure shows the light source turning on the light source at the same time to improve the brightness. The light guiding device 1350 can be combined with a plurality of X-cubes or dichroic mirrors to achieve a configuration of multiple light sources, which can be used for imaging white light or three primary color sources or four color light sources. To configure the multi-directional light source to be optically similar relative to the display, or to resemble an equidistant optical path to reduce optical misalignment problems, please refer to Figure 4C. A light guiding structure includes: a plurality of light guiding devices 1350 arranged on a light path; a plurality of light sources each disposed on a side of the plurality of light guiding devices 1350; wherein the plurality of light guiding devices 1350 are configured to guide The plurality of light sources, the number of light sources can be selected according to requirements. The plurality of light guiding devices 1350 described above may include a dichroic mirror, an X-square, or a combination thereof. If the number of the plurality of light guiding devices is three, the seven side configurable light sources are included. If the number of the plurality of light guiding devices is four, the nine side configurable light sources are included. In the above example, the light paths of at least six or nine light sources are equal in length with respect to the display, so that it is easy to control the light source, and multi-directional, multi-segment light source control can be provided.

The fifth figure shows a functional block diagram of the device integrated into the handheld device 10, such as a mobile phone. It can also be a digital camera, a digital camera, a GPS, a multimedia playback device, etc., which includes a SIM connector 130 for carrying the SIM card 135. The SIM card is not a necessary device for the mobile phone, and the PHS system does not need to be used. The handheld communication device 10 includes a radio frequency communication module including an antenna 105. The antenna 105 is coupled to the transceiver device 110 for receiving or transmitting signals. The RF communication module also includes the CODEC 115, DSP 120, and A/D converter. The device of the present invention includes a central control IC 100 for controlling the processing of signals and data, power control, and processing of input and output signals. An input unit 150, a built-in display unit 160, an operating system (OS) 145, and a power source 140 are electrically coupled to the control IC 100 described above, respectively. The device also includes a memory 155 coupled to the control IC 100 described above for storage as a data and operating system. Depending on the attributes, it can include ROM, RAM, non-volatile flash memory, and so on. The RF communication module can process the reception of the signal, the processing of the fundamental frequency, and the processing of the digital signal. The SIM card hardware interface carries the SIM card. Finally, the voice signal is sent to an output device such as speaker/microphone unit 190. The memory unit can be divided into three parts, namely, mask-type read-only memory (MASK ROM), non-volatile memory such as flash memory (FLASH), and static random access memory (SRAM). . Generally, the unchanging data can be stored in the mask-type read-only memory (MASK ROM). The system operation software or fixed application can generally be stored in non-volatile memory and execute other instructions. The internal data can still be retained in the power state, and can be read or written repeatedly when there is power. The image capturing unit 152 is electrically coupled to the control IC 100.

Therefore, the advantages of the present invention are that the optical structure can be simplified without using a filter and a plurality of optical lenses. In terms of miniaturization, since the color filter will cover or consume a lot of light and the optical path of the prior art is too long, the present invention uses gray scale imaging with at least a color-independent independent light source to generate R, G, and B parameters in color sequence. The image, and then the use of visual persistence to produce color completely solves the above problem.

Referring to FIG. 6A, if desired, the homogenizer 3210 can be disposed between the light source 1100 and the light guiding device 1350, or between the light guiding device 1350 and the display 1200, as shown in FIG. The homogenizer 3210 can be a Fresnel lens on the side of the light source, the light source being located at approximately its focal length, allowing the point source to pass through the Fresnel lens to a parallel speed of light. Fresnel lens has a discontinuous surface that is cut into a piece of curvature. The surface is divided into fine lines, so it looks like a circle of circles, that is, the Fresnel lens contains a series of concentric circular lines (ie The Fresnel zone) achieves a concentrating effect, and conversely places the light source at a focal length to form a parallel light velocity. Moreover, the Fresnel lens reduces the thickness at the same time to facilitate miniaturization. It can be thought of as a series of ridges arranged in a ring shape with sharp edges and a smoother center at the center. The design of the Fresnel lens allows for a significant reduction in lens thickness, weight and volume. The arrangement of the Fresnel lens in front of the light source can be applied to the above embodiments. It is also possible to use a collimator (sixth panel C) or a (concentrating) lens, an internal reflection structure, a grating to replace the Fresnel lens described above or to use it with a Fresnel lens to facilitate the generation of parallel light. The collimator contains a curved lens with the light source placed at its focus. The curvature of the mirror facing the light source is larger, and the curvature of the other mirror is smaller. The collimator can also correct whether other optical components are located on the optical axis, so that the light source can be used as a parallel beam or can be used for calibration purposes. The Fresnel lens or collimator described above may also be disposed between the display device and the projection lens, and the projection lens is described in its focus. See Figure 6D. A Fresnel lens or collimator 3210 is placed between the projection lens 1300 and the display 1200, and the projection lens described above is placed at the focus of the Fresnel lens or collimator 3210. In the back of the light source of the above embodiments, the retroreflective sheeting can be configured to reflect light into the display.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. All other equivalent changes or modifications which are not departing from the spirit of the present invention should be included in the following. Within the scope of the patent application.

1000. . . Shade control unit

1000A. . . Light control unit

1000B. . . Light sensor

1100W. . . White light source

1100R, 1100G, 1100B. . . Monochromatic light source

1100W. . . White light source

1200. . . monitor

1300. . . Projection lens

1400. . . Video signal input unit

1500. . . Wireless transmission module

1600. . . Memory card

1700. . . Input interface

10. . . Handheld communication device

IC100. . . control

105. . . antenna

110. . . Transceiver

115. . . Speech codec

120. . . DSP

125. . . D/A converter

130. . . SIM card connector

135. . . SIM card

140. . . power supply

145. . . OS

150. . . Input unit

155. . . Memory

190. . . Speaker and / or microphone

3210. . . Shader or Fresnel lens

The first figure shows a prior art schematic.

The second figure shows a prior art schematic.

The third figure shows a functional block diagram of the present invention.

The third figures A and B show a schematic diagram of the light source of the present invention.

The fourth figure shows a functional block diagram of the present invention.

The fourth diagrams A, B, and C show a schematic diagram of the light source of the present invention.

The fifth figure shows a functional block diagram of the coupled handheld device of the present invention.

6 to 6D show a schematic view of the configuration of the homogenizer of the present invention.

1000A. . . Light control unit

1000B. . . Light sensor

1100W. . . White light source

1200A. . . monitor

1300. . . Projection lens

1350. . . Light guiding device

Claims (13)

A multi-directional transmissive color image projection device comprises: a light control unit; a multi-white light source electrically coupled to the light control unit for controlling the independent light sources of the multiple white light sources to be turned on differently or simultaneously; the light guiding device And guiding the light emitted by the plurality of white light sources, wherein the plurality of white light sources are respectively disposed on the side of the light guiding device; and the color display is correspondingly disposed on the light guiding device for displaying an image, wherein the white color is The light source penetrates the color display; and the projection lens is correspondingly disposed on the color display for projecting the color image. The multi-directional transmissive color image projection device of claim 1, wherein the light guiding device comprises a dichroic mirror or an X-square. The multi-directional transmissive color image projection device of claim 1 or 2, wherein the multi-white light source comprises a laser, a light emitting diode or an organic light emitting element; the color display comprises a plasma display, organic A light-emitting display, a field emission display, a liquid crystal display, an electronic paper, or an IMOD display. The multi-directional transmissive color image projection device of claim 1 or 2, wherein the transmissive color image projection device can be built in or externally connected to the handheld device, the handheld device comprising a mobile phone, pen Electricity, tablet computers, media players, satellite positioning systems, digital image capture devices. The multi-directional transmissive color image projection device of claim 1 or 2, further comprising a light sensor coupled to the light control unit to adjust the brightness of the light source according to the brightness of the sensed external environment. The multi-directional transmissive color image projection device of claim 1 or 2, further comprising a collimator or a Fresnel lens between the display and the projection lens. A multi-directional image projection method includes: providing a light control unit and a plurality of white light sources, electrically coupling the light control unit to radiate the independent light of the multiple white light source, and the light control unit controls each of the multiple white light sources The independent light sources are turned on differently or simultaneously; a light guiding device is provided to facilitate guiding the light of the plurality of white light sources to a display, and the light is transmitted through the color display, wherein the light guiding device comprises a dichroic mirror or The X-block is disposed on the color display corresponding to the projection lens for projecting the image. The multi-directional image projection method of claim 7, further comprising a light sensor coupled to the light control unit to adjust the brightness of the light source according to the brightness of the sensed external environment. The image projection method of claim 7, wherein the multi-white light source comprises a laser, a light emitting diode or an organic light emitting element; the display comprises a plasma display, an organic light emitting display, a field emission display, a liquid crystal display . A multi-directional light guiding structure comprising: a plurality of light guiding devices arranged on a light path; a plurality of light sources each disposed on a side of the plurality of light guiding devices; wherein the plurality of light guiding devices are configured to guide the light guiding device A plurality of light sources; wherein the number of the plurality of light guiding devices is three, comprising seven side configurable light sources. The multi-directional light guiding structure of claim 10, wherein the plurality of light guiding devices comprises a dichroic mirror, an X-square, or a combination thereof. The light sensor is further included in the light control unit as described in claim 10 or 11, and the brightness of the light source is adjusted according to the brightness of the external environment sensed. A multi-directional light guiding structure comprising: a plurality of light guiding devices arranged on a light path; and a plurality of light sources each disposed on a side of the plurality of light guiding devices; The plurality of light guiding devices are configured to guide the plurality of light sources; wherein the number of the plurality of light guiding devices is four, and the nine side configurable light sources are included.