TWM250481U - An improved polarizing device applied on a projector - Google Patents

Description

M250481 4. Creation Instructions (1) [Technical Field to which the New Type belongs] This creation is an improved polarizing device applied to a projector, especially an LCD using a full-wavelength (380 nm ~ 700 nm) polarizing plate for LCD (Liquid Crystal Display) Polarizer for projectors. [Previous technology] The basic principle of projection display is to use an image modulation device (micro display panel) to modulate the light signal emitted by the light source to be projected onto the screen. In order to accurately project the color of the image, The light source is separated into three colors of R, G and B and controlled separately, and then the r, g, and B three-color image light sources are combined into the image to be projected, and then the projection lens is used to project onto the glory screen. The monolithic design is based on In continuous mode, the single-chip panel displays three colors of R, G, and B in time. Projection display products can be made into front-projection projectors that project images from the front of the screen, or they can be assembled into large-scale back (inside) projection TVs. The light projector is placed inside and projects images from the back of the screen. The image modulation device used in the optical system of the projection display. In the early days, a CRT (Cathode Ray Tube) was commonly used to directly generate light sources and images (unlike the projection display discussed below). Due to the use of three CRTs and three The projection lens is also called a three-shot projector. Nowadays, it is more common to use light bulbs to generate light sources, and then use the light source modulation elements such as LCD, DMD, or LC0S to control the projected image. LCD projectors are LCD projectors, and those using DMDs are DLP (Digital

Light Processing) projectors, with LC0S panels as the modulating elements, are LC0S projectors (LCOS Projectors), these are the so-called single shot 3

Page 7 M250481

4. Creation instructions (2) Machine 0 Because the single-gun projector uses only one projection lens _ θ one. It is easier to adjust the focal length than three-gun projectors, and has significant improvements in volume and weight. It is not only convenient to carry. The price is also attractive. For users, it is easy to carry, (2) easy to install, (3 ) Can project a 30 ~ 300-inch screen, (4) accept Vide'〇 and Data image signals, (5) can play the advantages of color dynamic images, etc. ° Projection display has a wide range of applications, such as watching TV movies from home, office meetings Large open spaces such as briefing books, school dynamic film teaching, audiovisual consumer venues, and exhibition venues can easily obtain good results using the large daytime display of the projection display. Since a single grab projector is easy to install, and can provide both static and dynamic images and sound effects, using = projector for presentations can greatly improve the efficiency of the conference. The projector can flexibly adjust the size of the projected picture.纟 For general commercial use:

: Righteousness, briefings or product introductions have been very popular. Recently, the new A Lightweight ’is flexible for individuals or small units to use ... Therefore, the commercial use J is currently the largest market for projectors.疋 Since the year of GG1 fermentation, it is the household market, whether it is home

Home Theate—r projectors or rear projection TVs are expected to cut into the consumer market of the family f! 5 # 'Now manufacturers are striving to improve the performance of projection monitors and develop lower-cost shelves ^ μ mouth you ^ LL L, the first learning engine of wooden structure to reduce production. "These two major development directions are to be able to compete with the improved CRT TVs" and to reduce the price of projection monitors is equivalent to lowering the door entry into the home market. Projection display correlation technology is quite complex, and the system parameters are Affect each other

M250481, Creative Instructions (3), and changing one of them may affect the integration between the whole. The projection display system generally requires eight components to process the optics, projection lens, drive circuit, and panel, color, and lighter.) If you are making a rear projection display, you need to use the same thing: the screen and the refractive mirror. The key components of the projection display include Er'er (HTPS LCD or DMD or LC0S, etc.), optical components (two sub-units, display, projection lens, etc.). These are the important and important components of the optical engine structure. 'In addition, the light source of the display is also one of the factors that affect the development of the industry. The high-brightness output bulbs required by the projection display are not easy to make. The size of the bulbs, miniature display panels, optical components and optical properties need to cooperate with each other. Adjustments and thermal effects are also important points that must be considered. Since projection display technology involves optics and electromechanics, even if the key components are in place, they still need to have the ability to design optical systems, mechanisms, and circuits. Among them, the technology can be described as interlocking, which affects the whole body, and the display must take into account performance. In addition, it is not easy to advance the technology by taking into consideration both heat dissipation and noise resolution while reducing weight. Miniature display panels that can be used by a projector include a transmissive LCD panel, a reflective DMD element, and a reflective LCOS panel. Their main function is to modulate the light emitted by the light source to be projected onto the screen. Because the projection technology enlarges and projects the image light, the slight defects of the image light source will be projected a hundred times magnified, so the display element is an extremely important link in the projection display technology. In order to make projection display products more lightweight, micro-displays with a diagonal of about 1 inch or smaller are often used, so that the corresponding optical components and light source systems can be relatively small in size.

Page 9 M250481 IV. Creative Instructions (4) Miniature displays used in projection systems can be divided into two types: transmissive and reflective. The transmissive type is a TFT-LCD that uses high temperature poly silicon (HTPS; High Temperature Poly Silicon). There are two types of microdisplays that can be used for the reflective type. One is the reflective LC0S (Liquid).

Crystal On Si 1 icon) liquid crystal panel; the other is DMD, which belongs to micro-electromechanical systems (MEMS; Micro-electromechanical systems). Semiconductor devices are used to build micro-mechanical and electrical element systems. Because of the physical movement of display elements, external The light source performs amplitude or phase modulation, so unlike LCD or LC0S, you need to select s-polarized aurora first. Transmissive LCD is currently the mainstream of single-chip microdisplays for projectors. The optical-mechanical structure can be divided into single-chip and three-chip according to the number of LCDs used. Monolithic LCD projectors use only one transmissive LCD. Since R, G, and B colors must be provided on the same LCD panel at the same time, the light source utilization efficiency is low. In order to accurately project the three colors R, G, and B of the image, the liquid crystal projector is controlled to separate the light source into R modulation. Because narrow-band filtering of color separation is more efficient and the color performance is better, the different colors are combined together. . Color 'can separate the colors of the light source and then combine the three colors. The three-piece G and B three colors correspond to each panel and the sheet has high light energy efficiency, so the light source is beneficial but requires very accurate position accuracy. Β two fronts penetrate Λ liquid Λ projectors are mostly three-piece, the main optical Structure: Guangli Push 10 'includes the light source module, lens array, and the number of elements. In addition to the factors of light source and system design, the utilization efficiency is improved first, and it is driven by the ancient times. In addition to the increased degree, the characteristics of the LCD panel

M250481 Fourth, creative instructions (5) Improved sex, increased aperture ratio, and the use of microlenses have also helped a lot. The CRT projector uses three CRT projection tubes to project R (red), G (green), and B (blue) two primary color scenes respectively, and then focuses the image on the screen to form a full-color daylight surface. The CRT projector installs two small CRTs representing the three primary colors of r, g, and B in the chassis in a horizontal row. 'Because the light projection path has not been bent, and there is no distortion of the screen's daylight quality, when the picture is still generated by the CRT and is matched with an efficiency With a higher optical lens system, it can have excellent image brightness and image quality. Since the projector and screen have been separated, the advantages of fixed optical adjustment have also been lost. If you want to get the perfect image quality and before you start watching, this type of projector must be carefully adjusted so that the light can be accurately focused on the screen 'and the two-color image is accurately converged to form a clear picture. This step may take several hours or even a day, so CRT projectors are currently only suitable for permanent installation. DLP projectors were developed exclusively by Texas Instruments (TI) more than ten years ago, but in recent years, mass production of semiconductor technology has only begun and has been accepted by the market. The principle of the DLP projector is to project the light source to the high-speed rotating red, blue, and green three-color filter color ring, and then pass through the DMD (Digital Micro mirror Device) chip to rotate through many tiny lenses on the chip at different angles, causing the light to be straight / refracted or Reflect to get full color image. DLP projectors are still relatively new, and it is too early to fully understand their advantages and disadvantages. LCD projectors can be roughly divided into two categories: LCD panel projectors (hereafter referred to as LCD projectors) and LCD light valve projectors. LCD is

Page 11 M250481 IV. Creative Instructions (6)

The substance between liquid and solid does not emit light by itself, and its working properties are greatly affected by temperature. Its operating temperature range is 55 ° C ~ + 77t. The projector uses the photoelectric effect of liquid crystal, that is, the arrangement of liquid crystal molecules in an electric field. X changes with use, affecting the transmittance or reflectivity of its liquid crystal cell, thereby affecting its optical properties, to produce maps with different gray levels and colors. LCD panels used in LCD projectors and the general market The liquid crystal displays seen above are different. The liquid crystal panel used by the LCD projector must be able to withstand strong light and high heat. At the same time, there are many transistors in the LCD panel as switches to block or transmit light. Because liquid crystals are regularly arranged liquids, they are affected by external forces, such as the influence of electric or magnetic fields, to change the alignment state. The display principle is to control the alignment of liquid crystal molecules by external voltage changes, and then control the path of light. , Resulting in light penetration, semi-penetration or impenetrability. As mentioned earlier, the basic principle of LCD projectors is to use the LCD module to modulate the light emitted by the light source. In order for the LCD liquid crystal module to accurately project the color of the image, the light needs to be separated into The three colors R, G, and B are controlled separately, and then the three colors r, g, and B are combined and projected onto the screen using a projection lens. σ

Crystal LCD projectors are distinguished by the number of LCD panels used, which can be divided into 4y and a. Since the single-chip LCD projector has three colors G, B, the color performance is better than

On the panel, the R three-chip type is poor at the same time. Although the cost is low, it has been eliminated in the market.

The basic principle of the LC0S projector is similar to that of the LCD projector, except that lc〇s

Page 12 M250481 4. Creation instructions (7) The projector uses the L C 0 S panel to modulate the light signal emitted by the light source to be projected to the glory screen. The LCOS panel uses a CMOS chip as a circuit substrate and a reflective layer, and then is coated with a liquid crystal layer and then packaged in a glass flat plate. The upper layer of the LC0S panel is a liquid crystal 'the bottom layer is a silicon substrate', that is, the bottom layer of the LC0S panel is a CMOS circuit using a Shi Xi substrate to replace the conventional HTPS LCD (High Tempei ^ tui'e Poly-Silicon Liquid Crystal Display). Glass base board. The biggest advantage of L C 0 S technology is that the aperture ratio can be as high as 90%, the South resolution and the panel structure are easy to be miniaturized. However, because the current technology is still immature and the standard process has not been established, the cost cannot be reduced and the product price is too high.

Please refer to FIG. 1, which is a schematic diagram of a conventional LCD projector structure. The structure of the LCD projector can be divided into three parts: a light source system 1 a, a spectroscopic light combining system 2A, and an imaging system 3A. The principle of the LCD projector is that a parallel light is generated by the light source system 1A, processed by the spectroscopic light system 2A, and finally an image is output by the imaging system 3A, which will be described in detail later. A light source 11A generates a parallel light. The light source 11A may be a metal halide (Metal Halide) or an ultra-high pressure mercury lamp (uhp). The parallel light passes through a lens array (Integrator) 21A, and the lens array 21A redistributes the parallel light to make the energy distribution uniform without causing uneven brightness. Then the parallel light passes through a first mirror 22A, is reflected by the first mirror 22A, and then passes through a first dichroic mirror 2 2ia. The dichroic mirror 2 21A has a filtering function, that is, a specific wavelength Light passes through 'the rest cannot pass through but is reflected. At this time, the parallel light is converted into two parts by the first dichroic mirror 221A, and the first part is light with a wavelength of blue light.

Page 13 M250481 IV. Creative Instructions (8) The second part is light of other wavelengths. The first part of the blue wavelength light is directed to a second reflector 22 3A, and the rest of the second wavelength light is reflected to a second dichroic mirror 222A. The second dichroic mirror 222A further filters parallel light, that is, Only the red light is allowed to pass, so the red light goes directly to a third mirror 224A and reflects the red light to a fourth mirror 225A, and the green light is reflected by the second dichroic mirror 222A. So far the preliminary red, blue, and green spectrometers have been reached. Please refer to Fig. 1 and Fig. 2. The green light is reflected by a second dichroic mirror 2 22A to a first condenser lens 2 221A. The green light passes through the first condenser lens 2 221A, and the first condenser lens 2 2 2 1 A maintains the optical path. Convergent state, allowing light energy to pass in parallel. Then it leads to a first green light polarizing plate 2 222A for the first polarization, then passes through a first LCD panel 2223A, and then passes through a second green light polarizing plate 2224A for the second polarization to achieve the best effect. At this point, the green light splitting process has been completed. The blue light processing program passes a second condenser lens 2 231A. The second condenser lens 2 2 3 1 A maintains the optical path to converge and allows the light energy to be transmitted in parallel. Then it passes to a first blue light polarizer 2232A for the first polarization. After passing through a second LCD panel 2233A, and then passing through a second blue light polarizing plate 2234A for the second polarization to achieve the best effect, the blue light splitting processing has been completed. The red light passes through a third condenser lens 2 251A. The third condenser lens 2 251A maintains the convergence of the light path and allows the light energy to be transmitted in parallel. It then passes to a first red light polarizer 2 2 52 A for the first polarization, followed by Pass a third LCD panel 2253A, and then pass through a second red light polarizing plate 22 54A for the second polarization to achieve the best effect. The red, blue, and green lights are polarized twice, and are incident on a combined light unit 23A. The combined light unit 23A combines red, blue, and green light signals.

Page 14 M250481

^ Δδ 1 λ ^ ^ λ to the lens 31Α ', the synthetic light passes through the lens 31Α, and is projected and concentrated on a 屝 #r (not shown) To form an image, please refer to FIG. 3, A A feather A -W * / V ^ ,, m ^, a spectral analysis data chart of a red light polarizing plate, one of Feng I know technologies. Among them, "Single suppression of y πΓ" means that there is only one polarizer, without "two counter, parallel" means that the angles of the fences of the two polarizers are two lights, and "仃" represents the grid of two polarizers. The blocking angles are orthogonal to each other. The wavelength range of red light is from 5 50 nm to 770 nm, and the industry generally takes 61 η η as the observation point. The straight line data graph in Figure 3 shows the popularity of known technologies

The light polarizing plate has a transmittance close to 0% around 5 65 nm to 655 nm, which means that the red light absorption rate is quite high. However, it only applies to the red wavelength range and is not stable in other wavelength ranges.

More than a month ..., Figure 4 'This is a spectral analysis data chart of a green light polarizing plate, which is one of the conventional techniques. “Single” means that there is only one polarizer, without the first polarizer; “Parallel” means that the grid angles of the two polarizers are parallel to each other; “Straight” means that the grid angles of the two polarizers are perpendicular to each other Father. The wavelength of green light ranges from 490 nm to 560 nm, and the industry generally uses 550 n m as the observation point. The straight data graph in Figure 4 shows that the green polarizing plate of the conventional technology has a transmittance of less than 10% at about 380 nm to 610 nm, that is, the green light absorption rate is quite high. However, it only applies to the green wavelength range and is not stable in other wavelength ranges. Please refer to FIG. 5, which is a spectral analysis data chart of spectral analysis of a blue light polarizing plate, which is a conventional technique. “Single” represents only one polarizing plate ’without a second polarizing plate;“ Parallel ”represents a grid of two polarizing plates

11 ^ page 15 M250481 4. Creation instructions (10) The angles of the columns are parallel to each other; “Straight” means that the barrier angles of the two polarizers are perpendicular to each other. The wavelength range of blue light is 430 nm ~ 490 nm, and the industry generally takes 440 nm as the observation point. The straight line data graph in Figure 5 shows that the blue light polarizing plate of the conventional technology has a transmittance of less than 5% at about 400 nm to 570 nm, that is, the blue light absorption rate is quite high. It only applies to the blue wavelength range, and is not stable in other wavelength ranges. [New content] This creation is an improved polarizing device applied to a projector, especially a polarizing device applied to an LCD projector using a full-wavelength (380 nm ~ 700 nm) polarizer. This creation can solve the characteristics of the fixed optical calibration that the CRT projector lacks in the conventional technology and the disadvantages of the time-consuming and labor-intensive calibration after installation. This creation is an improved polarizing device applied to a projector, especially a polarizing device applied to an LCD projector using a full-wavelength (380 nm ~ 700 nra) polarizer. This creation can solve the shortcomings of the lack of stability, standard manufacturing process and the high cost of LC0s LCD projectors in the conventional technology. This creation is an improved polarizing device applied to a projector, especially a polarizing device applied to an LCD projector using a full-wavelength (38 nm ~ 700 nm) polarizer. This creation can reduce the errors in [CD projector operator's assembly errors and the high cost burden of using red, blue, and green polarizing plates, respectively. The improved polarizing device of this creation includes a light combining device and three sets of polarizing devices

M250481 IV. Creation Instructions (11) ---- The single polarizing group consists of two polarizing plates and a coffee panel, which are respectively arranged on three sides of the light combining device. When the light is polarized by three sides, After the group polarizing poles are transmitted to the light combining device, they are collected into a fourth surface and emitted for imaging. The improved polarizing device is designed with a full wavelength (380 nm ~ 70 0 nm), that is, a single red light wavelength polarizing plate, a blue light wavelength polarizing plate, and a green light wavelength polarizing plate are combined into a full wavelength type (38 (0 nm ~ 700 nm) polarizing plate. This full-wavelength (38 ° ~ 700 nm) polarizing plate replaces any of the aforementioned polarizing plates and works with traditional technology of polarizing devices to achieve better projection efficiency. In order for those skilled in the art to understand the purpose, features and effects of this creation ', the following specific embodiments and the accompanying drawings are used to explain this creation in detail as follows. [Embodiment] Please refer to FIG. 6 ′, which is one of the preferred embodiments of the creative ^ c d projector structure diagram. The structure of the LCD projector can be divided into three parts: a light source system 1, a light splitting and combining system 2, and an imaging system 3. The principle of the LCD projector is that a parallel light is generated by the light source system 1 and processed by a spectroscopic combining system 2 and an image is finally output by the imaging system 3, which will be described in detail later. A light source 11 generates a parallel light. The light source 11 may be a metal halide lamp (Metal Halide) or an ultra high pressure mercury lamp (UHP). The parallel light passes through a lens array (Integrator) 21, and the lens array 21 redistributes the parallel light to make the energy distribution uniform without causing uneven brightness. The parallel rays then pass through a first mirror 22 and pass through the first mirror

M250481 IV. Creative Instructions (12) 22 After reflection, it passes through a first dichroic mirror 2 21. This dichroic mirror 221 has the function of filtering, that is, passing light of a specific wavelength, and the rest cannot be transmitted and is reflected. . At this time, the parallel light is filtered into two parts by the first dichroic mirror 2 21, the first part is light of blue light wavelength, and the second part is light of other wavelengths. The first part of the blue wavelength light is directed to a second mirror 223, and the remaining part of the light of the second wavelength is reflected to a second dichroic mirror 222. The second dichroic mirror 2 2 2 further filters parallel light, that is, only red light is allowed to pass, so the red light goes directly to a third mirror 224 and reflects the red light to a fourth mirror 225, and the green light is The second dichroic mirror 222 reflects out. So far, the initial red, blue and green spectrometry has been achieved. Please refer to FIG. 6 and FIG. 7, the green light is reflected by a second dichroic mirror 2 22 to a first condenser lens 2221, and the green light passes through the first condenser lens 2221, and the first condenser lens 2 22 1 keeps the optical path in a convergent state, so that Light energy is transmitted in parallel. Then it leads to a first full-wavelength polarizing plate 2 2 2 2 for the first polarization, then passes through a first LCD panel 2 223 and passes through a fourth full-wavelength polarizing plate 2 2 2 4 for the second polarization. For best results. So far, the green light spectroscopy processing has been completed. The blue light processing program passes a second condenser lens 2231, which maintains the optical path in a converged state and allows light energy to be transmitted in parallel. Then it leads to a second full-wavelength polarizing plate 2 2 3 2 for the first polarization, then passes through a second LCD panel 2233, and then passes through a fifth full-wavelength polarizing plate 2234 for the second polarization to achieve the best polarization. effect. At this point, the blue light has been processed. The red light passes through a third condenser lens 2 251. The third condenser lens 2251 maintains the optical path in a convergent state, allowing the light energy to be transmitted in parallel, and then passes to a third full-wavelength polarizer 2252 for the first polarization, and then passes through a third LCD panel 22 53 and then wear

Page 18 M250481 IV. Creative Instructions (13) Pass a sixth full-wavelength polarizer 2 2 54 for the second polarization to achieve the best results. The red, blue, and green lights are polarized twice, and then incident on a combined light beam 23 'The combining prism 23 combines the red, blue, and green light signals into an image to be projected and then Refracted to a lens 31, the synthesized light passes through the lens 31 and is projected onto a screen (not shown) to form an image. Incidentally, compared with the polarizing plate in the conventional technology, its operating temperature range is below 80 ° C, and the full wavelength (380 nm ~ 7 00 nm) polarizing plate of this creation can withstand 80 ~ 11 0 ° C's high temperature. Meanwhile, the fourth full-wavelength polarizing plate

2224, the fifth full-wavelength polarizing plate 2234, and the sixth full-wavelength polarizing plate 2254 are not limited to be fixed on the combining light 23, but another example is: the fourth full-wavelength polarizing plate 2224 (the fifth The full-wavelength polarizing plate 22 34 and the sixth full-wavelength polarizing plate 2254 may also be fixed on a glass, and then the glass is placed between the combined light 23 and the LCD panel. Please refer to FIG. 8, which is a spectral analysis data chart of a full-wavelength (380 nm to 700 nm) polarizer, which is one of the preferred embodiments of the present invention. “Single” means that there is only one polarizer and no second polarizer is placed; “Parallel” means that the fence angles of the two polarizers are parallel to each other; “Straight” means that the fence angles of the two polarizers are perpendicular to each other . Full wave of red, blue and green light

The long range is from 400 nm to 700 nm, and the industry generally uses 610 nm, 4400 nm, and 50 nm as observation points. The straight-line data graph in Figure 8 shows that the full-wavelength polarizing plate of this creation has a transmittance close to 0% at about 380 nm to 700 nm, that is, the red, blue, and green light wavelength ranges have high absorption rates and are very stable. Although this creation has been disclosed above with a preferred embodiment, it is not intended to limit this creation. Anyone familiar with this art will not depart from the essence of this creation.

Page 19 M250481 IV. Creation Note (14) Various modifications and retouching can be made within the scope of God and Harmony. Therefore, the protection scope of this creation shall be determined by the scope of the attached patent application.

M250481 on page 20 Brief description of the diagram-Figure 1 is a schematic diagram of the LCD projector structure of one of the conventional technologies; Figure 2 is a schematic diagram of the polarizer of a CD projector, one of the conventional technologies; Figure 3 is of the conventional technology A spectral analysis data chart of a red light polarizing plate; FIG. 4 is a spectral analysis data chart of a green light polarizing plate, which is one of the conventional technologies; FIG. 5 is a spectral analysis data chart of a blue light polarizing plate, which is one of the conventional technologies; The figure is a schematic diagram of the LCD projector structure according to one of the preferred embodiments of the invention; FIG. 7 is the schematic diagram of the LCD projector polarizing plate according to one of the preferred embodiments of the invention; Spectral analysis data chart of wavelength polarizer. [Illustration of drawing number] 1A light source system 11A light source 2A light splitting and combining system 21A lens array 22A first reflector 221A first dichroic mirror 222A second dichroic mirror 222 1 A first condenser lens 2222A first green light polarizing plate 2223A An LCD panel 2224A, a second green polarizing plate 223A, a second reflector 223 1 A, a second condenser

M250481 on page 21 Brief description of the drawings 2232A First blue light polarizer 2233A Second LCD panel 2234A Second blue light polarizer 224A Third reflector 22 5A Fourth reflector 225 1 A Third condenser 2252A First red light polarizer 2253A Third LCD panel 2254A Second red light polarizing plate 23A Combined light 3A imaging system 31A Lens 1 Light source system 11 Light source 2 Spectroscopy system 21 Lens array 22 First reflector 221 First dichroic mirror 222 Second dichroic mirror 222 1 First condenser lens 2222 First full-wavelength polarizer 2223 First LCD panel 2224 Fourth full-wavelength polarizer 223 Second reflector

Page 22

M250481 Brief description of the diagram 223 1 2232 2233 2234 224 225 225 1 2252 2253 2254 23 3 31 Second condenser second full-wavelength polarizer second LCD panel fifth full-wavelength polarizer third reflector fourth reflector third condenser The third full-wavelength polarizing plate The third LCD panel The sixth full-wavelength polarizing plate combined optical imaging lens 1 · 1 »Page 23

Claims (1)

M250481 V. Application for patent scope 1 · An improved polarizing device applied to a projector, the improved polarizing device includes: a light combining device; at least one polarizing group, the polarizing group includes at least one polarizing plate and an LCD panel, and The LCD panel is interposed between the polarizing plate and the light combining device; the polarizing group is located on one side of the light combining device, and the light passes through the polarizing group and then passes through the light combining device for imaging. 2 · The improved polarizing device according to item 1 of the scope of the patent application, wherein the polarizing plate is a full-wavelength polarizing plate; wherein the full-wavelength polarizing plate can absorb the wavelength range covering both red, blue and green light. Wavelength range. 3. The improved polarizing device according to item 1 of the scope of patent application, wherein the light combining device is a synthetic chirp. 4 · The improved polarizing device according to item 1 of the scope of the patent application, wherein a condenser can be provided in front of the improved polarizing device. 5. The improved polarizing device as described in item 1 of the scope of patent application, wherein a dichroic mirror can be installed in front of the improved polarizing device. 6 · The improved polarizing device described in item 1 of the scope of the patent application, wherein a reflector can be provided in front of the improved polarizing device. 7 · The improved polarizing device as described in item 1 of the scope of patent application, wherein a lens array can be provided in front of the improved polarizing device. 8 · The improved polarizing device described in item 1 of the scope of patent application, wherein a light source can be provided in front of the improved polarizing device. Page 24