TWI251684B - Diffraction micro-structure color splitting device - Google Patents

Abstract

There is provided a diffraction micro-structure color splitting device, which uses the diffraction theory and the binary optical computation theory to determine a color splitter with a complicated 2D surface phase micro-structure via the operation of phase iteration method. The micro-structure color splitter has a multi-wavelength modulation effect for simultaneously splitting and condensing the light wave, thereby effectively simplifying the number of using system elements and greatly increasing the usage efficiency of the backlight source for the display device.

Description

1251684 V. INSTRUCTION DESCRIPTION (i) [Technical Field] The present invention particularly relates to providing a surface phase microstructure optical element to simplifying the use of the element and improving the optical device. [Prior Art] The species can be used at the same time, and there is a knife wave and a cluster. It is applied to the 髟ayou, ^^ _ outside Xuan display system. Political structure color two-dimensional reachable wave Wang Wenqiao Ϊ - the main birth of low power consumption and other advantages Crystal display Iter) A light wave like three T through the source wear into the spectrum band and thus. In order to do it first! However, with ^ ’ recent ΐ quantity, unfortunate ‘ and by g-technology to achieve ^ all contain 4 F butyl 4 filter is blocked 卞 T F T ^ too much. The filter should pass, i cause the light 2 to improve the upper i-wave, and then the image is replaced by the liquid-film danger. The damage of the FT film passes through the image (CRT/Cathode Ray) Tube) display does not (four) progress 'various display technologies such as the rain after the spring ^ crystal display (LCD) has a thin and short, dangerous, flat right angle display and image stability is not the mainstream status of the CRT; however, the current liquid using chemical color filter (c〇1〇r Η For the purpose of display, since the L c-plane [": G, B three sub-pixels, :: = clothing is only available for the red, blue, and green spectrum bands into the TF-d-pixel. Most of the circuit parts on the D-pixels, and only the part of the circuit, the aperture ratio is too low, so that the light is on the pixel, and through the TFT pixel: complex J can only correspond to the red or blue or green frequency, The remaining spectrum light waves are absorbed and disappeared, and the loss of the system light is based on the t-shaped shape of the 珈田士心, and the other seven 丄 sheep are also limited to the limit. If the light source enters the TFT pixel, 1251684 5, invention description (2) Focus, that is, to each T filter Use 'can be used as a description: 1 · US patents please refer to the structure 2 or the full-phase wave 7,8 concentrating elements, and the sub-pixel array system needs to be matched by two components. 2. US patent Please refer to the combination of the R, the level of the mirror, the space required to set the space, 3 _ US patent can make the light of the opening of the material to the F pixel of the light source is too low, the following patent document, the fifth, 748, 828: 1 picture, which is in the backlight, so that the light is incident on the part), when the light is above, 9 will pass through the other 4 (which can enter the liquid crystal panel 56 for the microlens array.) The wave component (light color dispersion is achieved, not only needs to be considered, but the module is added, No. 6, 3 9 2, 8 06: 2), which is separated by micro G and B bands, and the convergence to the receiving end corresponds to the tradition. The color filter considers the complicated assembly and thus causes the excessively high number 6th, 104, 446: Source 1 a light structure in a column or in the liquid structure 3 Complex cost: receiving the lowest 'and increasing the optocoupler II , you can avoid using the color and the second technology The subordinates of the subordinates of the light and the shortcomings of the light exiting through the light collimation structure 3 (can be the optical phase separation into R, G, B, the refractive index change lens placed on the light dispersion structure 3) The color machine required for each of the corresponding D-type crystal displays and the concentrating element 4 are both white (the assembly alignment problem, and the grating demultiplexing element 10 is required to be incident on the lens group 1 1 The position of each diffraction is to be micro-grating and transparent. The system of this patent technology is aimed at the problem, and it requires a large load. 1251684 V. Invention Description (3) Please refer to Figure 3, By using the condensing and splitting capability of the GR IN 1 ens concentrating grating, the white light spectrum incident on the component can be split and concentrated, and the diffracted beam of R, G, and B will be concentrated to Corresponding pixels. The key optical components of this patented technology are composed of two different materials (gradient index lens + single refractive index transmissive grating), so the system is more complicated and the component cost is also relatively south. SUMMARY OF THE INVENTION The main object of the present invention is to provide a diffraction microstructure color demultiplexing device which utilizes a diffraction theory and a computational theory of binary optics to calculate a complex two-dimensional operation through a phase iterative method. The color phase plate of the surface phase microstructure has the multi-wavelength modulation effect, and can simultaneously perform the splitting and focusing of the light wave. When used in a liquid crystal display, the light source can be firstly used. After splitting, the light waves in each spectral band are respectively concentrated on the corresponding TFT sub-pixels, thereby increasing the aperture ratio when coupled to each TFT sub-pixel, and minimizing the absorption of light energy by the color filter material. Further, the light use efficiency is greatly improved. A second object of the present invention is to provide a diffraction microstructure color splitting device, wherein the microstructure color splitting wave optical component simultaneously performs partial wave splitting and focusing of a light wave with a single component, and can reduce many still need additional lenses. The assembly of the system architecture of the array is aligned with the program and cost, thereby achieving the benefits of reducing system complexity, saving system space, and saving module cost. Another object of the present invention is to provide a diffraction microstructure color splitting device, wherein the microstructured color splitting wave optical element has planarization, element

1251684 V. INSTRUCTIONS (4) Features of small size and good light transmission 5 Therefore, in addition to the use of unit parts, they can also be arranged in an array to form a liquid crystal module integrated into a liquid crystal display. Another object of the present invention is to provide a diffraction microstructure color splitting device, wherein the microstructure color splitting optical element combines the functions of a conventional color filter and a microlens array, and when a color CCD system is applied, It can achieve the simplification of the number of system components, the improvement of light efficiency and the improvement of aperture ratio. [Embodiment] In order to enable the reviewing committee to further understand the present invention, a preferred embodiment will be described with reference to the following description: The present invention calculates the phase equation required for the diffractive microstructure optical element. Through the theoretical calculation of binary optics and diffractive optics, and then using the phase iteration method to solve the surface structure of the component, the iterative loop is as follows: 1251684 V. Inventive Note (5) Φ;

AdT ^2 'ecu: Φ, exp

CM)J

Arg{ j,i G k I a P ' 7 = 1_ A', · work G k,a P'

Lp,kaG ]p, Σ η(^λ〇m where: 0 1 : is the phase of the component 02: the phase of the light field is obtained according to the above, and the phase of the desired component can be obtained, and then calculated by the program is 11·· 1251684 Explanation (6) The 3D micro-structure of the component can be obtained. Please refer to Figure 5 for the color-demultiplexing plate. 2 The light source is properly designed and designed to be post-modulated, so that the light source of the component spectrum band is incident. In order to invent the application with small microstructure and good light transmission. Please apply every single wave and focus in the array after the polarizing plate 2 2 of the liquid crystal display, and set each other 'and then L blue light; the characteristics of the invention Therefore, when it is prime, it can be substantially the same spectrum band. The partial wave of the 0 optical element of the present invention and its microjunction light propagate to the focusing effect. Please refer to the characteristics of R, G, and the color of the performance, see the liquid crystal mode of the eighth. Entering the color of the color one to converge the light wave to the color of the C panel. The color wave is added to the surface light structure by the light wave. As shown in Fig. 4, the two-wavelength splittable focusing has a copy, its focus, structure If the observation plane, and FIG three waves are 6 B 2 defined wavelength plate so a single view this group, color sub-wave plate

Divide R to correspond to the emerging non-wave plate 2 to converge the openings to integrate the dichotomous two. Therefore, when the incident light (the focal plane is separately arranged, the length of the length of the polyposition has 0 elements to make the invention to the backlight sheet 2 0 2 0, , G, TFT The same spectrum 0 is due to the post-focus rate, and then the color source of the re-dimensional surface wavelength is not surfaced. For the purpose of planarization, the array of array type 2 1 , that is, the three sub-pixel bands of light B have the corresponding partial wave at the same time, and the phase modulation is made by phase fine-tuning. The wavelength can be split in blue and green. If you read the seventh, the component can also be 4 non-column visible light. The color wave has different frequency 2 3 array red light, and the TF characteristic of the partial wave. For the T structure, the phase design bit and the red frequency slice can be obtained. Yu Guangyi's design diagram 'The area of the array is combined with the applied wave through the partial wave plate to perform the spectral band green light and the focused Ding image can be used to

1251684 V. INSTRUCTIONS (7) 愔I to avoid the difference of the spectral wave loss caused by the traditional corresponding filter: "The invention can greatly improve the efficiency of light use and the effect of color display: special: 夕卜' The color splitter 20 of the invention can reduce the complexity of the system and save the system by reducing the complexity of the system and the cost of the system architecture of the lens array. : a and the cost of the module, so it can be applied not only to liquid crystal y for color CCD systems. Referring to FIG. 9, the color wave plate 20 of the present invention is changed in the right, and the micro-structure design is changed to form a three-wave multi-point focusing, and the respective arrays show the array blue, green, and red spectrum bands. Light waves. Referring to FIG. 1 , the three-wavelength individual multi-point focusing effect of the present invention is applied to the array, so that each single color-wavelength slice 20 corresponds to the same focus number τ FT sub-pixel 2 3 , that is, It reduces the number of required color splitters 2 阵列 in the array and reduces the cost of the array. Referring to FIG. 1 , the color splitting plate 2 of the array of the present invention is focused on the focus, and the focus points can be distributed in different positions in the space according to the user's requirements, so that each A focus point position forms a spot of light representing three colors of r, G, and B. Referring to Figure 1 2, the color splitting chip array of the present invention can be fabricated on a high molecular weight quartz or glass substrate 24 to provide splitting and focusing characteristics. Referring to Fig. 1 3, the color splitter 2 〇 array of the present invention can be fabricated on the other side of the substrate 25 with a polarization conversion function, and the gain, split-wave, and focus functions are integrated on a single component. Referring to Figure 14, the color 分 2 〇 array of the present invention can be fabricated on the other side of the substrate 26 having a polarized sheet characteristic, and the polarization, splitting, and focusing functions are integrated into a single unit.

1251684 V. Description of the invention (8) on the component. Ι1·Ι 1251684 Schematic description of the drawing Fig. 1: Schematic diagram of the U.S. Patent No. 5, 748, 82. Figure 2: Schematic diagram of U.S. Patent No. 6, 3 9 2, 8 06. Figure 3: Schematic diagram of U.S. Patent No. 6,10,4, 4,6. Figure 4: The 3D microstructure surface structure of the two-wavelength splittable focus. Figure 5: Schematic diagram of the three-wavelength individual single-point splitting focus of the present invention. Fig. 6 is a view showing the distribution of the three-wavelength focusing positions of R, G, and B of the present invention. Figure 7: Schematic representation of the array of the invention.

Figure 8 is a diagram showing the correspondence between the three-wavelength individual single-point splitting focus array and the T F T sub-pixel array of the present invention. Figure 9 is a schematic diagram of the three-wavelength individual multi-point splitting focus of the present invention. Fig. 10 is a schematic diagram showing the correspondence between the three-wavelength individual multi-point-wavelength focusing array and the T F T sub-pixel array of the present invention. Figure 11: Schematic diagram of the focus distribution of the present invention. Figure 12: Schematic diagram of the present invention with a high transmittance component substrate. Fig. 3 is a schematic view of the present invention in combination with a component substrate having a polarization conversion function.

Fig. 14 is a schematic view of the present invention in combination with a component substrate having a polarizing plate characteristic. [Component No.] Conventional part: 2: Light collimation structure 4: Concentrating element 6 : T F T sub-pixel array 1 : Backlight 3 : Light dispersion structure 5 : LCD panel

Page 12 1251684 Schematic description of the 1 〇 _ optical thumb splitting component of the present invention: 11: lens group 2 〇 color splitting wave plate 2 1 : backlight 2 2 polarizing plate 2 3 : TFT sub-pixel 2 4 2 6 Glass substrate polarizer substrate 2 5 : Polarization conversion substrate

Claims (1)

1251684 VI. Patent Application Range 1. A diffraction microstructure color demultiplexing device, which is a color demultiplexing plate, which has a complex two-dimensional surface phase microstructure, the distribution of the microstructure and the geometric feature size The white light incident on the backlight can be split and focused simultaneously, so that the light waves of three different spectral bands of R, G, and B can generate the splitting and focusing effects at different positions in the space. 2. The diffraction microstructure color demultiplexing device according to claim 1, wherein the two-dimensional surface phase microstructure of the color separation plate is transmitted according to a diffraction theory and a binary optical calculation theory. The operation of the phase iteration method calculates the geometric feature microstructure. 3. The diffraction microstructure color demultiplexing device of claim 1, wherein the color separation plate can spatially generate a single point splitting focus of three wavelengths. 4. The diffractive microstructure color demultiplexing device of claim 1, wherein the color demultiplexing plate can spatially generate respective multi-point diplexing focusing of three wavelengths. 5. The diffraction microstructure color demultiplexing device of claim 1, wherein the color separation plate is arranged in an array. 6. The diffractive microstructure color demultiplexing device according to claim 5, wherein the color splitting wave array is used in a liquid crystal panel, and the splitting and focusing characteristics thereof can split the light source into Light waves of three different spectral bands, red, green and blue, are concentrated to the corresponding R, G, and BTFT sub-pixels in the liquid crystal panel to provide the color required for image display. 7. Diffraction microstructure color splitting according to item 4 or 5 of the patent application scope Page 14 1251684 VI. Patent application device, wherein when the color splitter is focused on multi-point defocusing, the R, G and BTFT sub-pixels on the liquid crystal panel correspond to the color splitting plate microstructure. The color focus point distribution depends on the TFT sub-pixel arrangement. 8. The diffractive microstructured color-demultiplexing apparatus of claim 3, wherein the color-demultiplexing wave-focusing point system is distributed at different defined positions in the space. 9. The diffraction microstructure color demultiplexing device according to claim 1 or 5, wherein the color separation plate is formed on a high transmittance polymer material or a quartz or glass substrate. The diffractive microstructure color demultiplexing device according to claim 1 or 5, wherein the color demultiplexing plate can be fabricated on the other side of the substrate having the polarization switching function. The diffractive microstructure color demultiplexing device according to claim 1 or 5, wherein the color demultiplexing plate is formed on the other side of the substrate having the characteristics of the polarizing plate. 1 2. The diffraction microstructure color demultiplexing device according to claim 1, wherein the color separation wave plate is applicable to a color C C D system to replace the use of the microlens and the filter. Page 15