TW200420978A - Light emitting apparatus and method for reducing lamp image of light emitting apparatus - Google Patents

Abstract

The novel technology and means can prevent low illumination and reduce lamp image. The light emitting apparatus has lamp 3 being disposed on the backside of light-emitting plane, including diffusion films 11, 13 as the haze member for haze the lamp image. The lens members 12b, 14 are used to increase the number of hazed lamp image along the planar direction due to the lens.

Description

200420978 V. Description of the invention Q) [Fa: technical field to which it belongs] The present invention relates to a

The light-emitting device of the group is a straight-down type that is not used for A. [Prior art] The method of reducing the image of the lamp tube of the first device is ‘first M 2: the display device includes a liquid crystal panel and a set of moonlight branches. The backlight module is a direct-type backlight module composed of two: first, the first to the liquid crystal panel: 述: a number of thick white plates formed by multiple cold cathodes. For the direct type backlight module, the moon plate is diffused from the cold cathode main plate to obtain a planar light emitting surface. & Light for Diffusion When light from the lamp tube passes through the diffuser plate, it is diffused by a diffusing agent. The 'diffusion plate' existing in the politic plate usually has a thickness of several 时. When the light-passing plate is used, the diffusion effect of the diffusing agent is large, which can: ^ image. J Λ, Meidi reduces the shadow of the light tube ^ Also, the traditional diffuser plate is set to a relatively low light transmittance, and the official light is not reflected and diffused by the diffuser plate, which can be suppressed from being directly above the light tube and placed 2 clearly. It also has a high diffusion effect at the same time, so as to obtain a relatively good luminous product. Such a traditional direct-type backlight module. In order to obtain a planar light emitting surface formed by a cold cathode tube of a linear light source, the diffusion plate is Indispensable. Also, for the case of the diffuser plate, it is difficult to eliminate the image of the lamp tube. Although, for example, No. 2 0 2-3 1 3 1 0 3, the light curtain (1 丨 t 丨 ng curtain) is used in the lamp. Directly above the tube to block light, so that the light on the light emitting surface has

13012pif.Ptd Page 5 200420978 V. Description of the Invention (2) ^ ”疋 However, in this case a diffuser is still necessary. The installation of the diffuser plate is inferior in obtaining the desired luminous quality, but it has the disadvantage that the luminous efficiency is low. Inverted = For the diffuser plate, because the light from the lamp tube does not fall on the diffuser plate, ΐ x will have a good luminous quality ', but its brightness will be absorbed down, resulting in low luminous efficiency. Diffusion in the expansion plate creates a small phase of light However, it is considered that the increase in the number of lamps to increase the brightness and shrink is the lamp 3: to increase the brightness and reduce the image of the lamp, but the increase in S number will cause power consumption. [Content of the invention] To reduce the lamp tube ΐ: what is provided is to prevent the brightness from being low and scattered to the extent that the image of the lamp tube is kept. The second image, as well as the increase in direction. g ~ number of image 1 through lens; in the first embodiment of the present invention, the light remaining from the light from the lamp tube is used to remove the light from the lamp tube. The brightness and darkness of the model = Lu image makes moderate diffusion, tube image films, etc .: J shovel: The number of dark blurred image of the tube is increased by using the lens to be scattered in the direction of the surface. "Using a lens film ... As a result, more light tubes than the actual number of light tubes appear on the light-emitting surface." 5. Description of the invention (3) Images. The digestion effect is ϊ = early ~ in the case of adding the number of lamp officials' to the lamp image of the lamp; image: 部 r ::; :::: paste: In the state, it will not be able to smash up = ^ = "3 ^^ stack It is used to collect light and the lens film combination, from the strict black # ,,. In the traditional diffuser and: and the tube image is reduced two states τ: enough: to reduce the positive appearance of the light-emitting surface on the front : Strip: For the spread in all directions, the brightness of the falling surface is increased to make the expansion; Seer ::: = set; the mirror diaphragm is used to make the positive side, as the lens of the present invention, although the iron can be protected by rust Mei Erji shot at the lens film of the lens of the present invention. Here, 'the light from the lamp tube is maintained !; the scattered light passes through the lens film', so that the image of the lamp tube is clearly seen. The second embodiment is specific to the light-emitting device behind the light-emitting surface structure. The package includes: a line that allows direct light from the linear light source to enter and expand. Light passes through, and = plane: 'Configure a plurality of protrusions extending slightly in parallel with the linear light source (where it is placed so that light from the lens face can be incident. We expand the film With the number! The diffusion film is a thin film, and the thickness of the diffusion plate is not 200420978 V. Description of the invention (4), the degree of the lamp tube image is blurred without reaching a t. Then, from the first 1 The light emitted by the diffusion film passes through the first shovel: f tube shadow: capture, with the lens acting in the long direction of the linear light source / straight; = part of the = image is dispersed. Use the first diffusion film to increase the blur ”—Lamp tube: Make the interval between the tube images smaller, such as the official shadow situation, and increase the uniformity of the light emitting surface upward. $ The second increased number of diaphragms makes the light blur by blurring the light. Uniformity = Xiangsheng uses the second diffuser plate to make the two diffuser films substantially overlap, although it is not necessary to diffuse-some difficulties, because the lens V between the two diffuser films: the image will have ± light (through diffusion Plate) Light V directly incident on the first diffusion film: the light tube light tube image. First, the above-mentioned situation for sufficiently raising the light tube image can be reduced, and it is configured so that the former] It is formed by a plurality of lenses that are extended parallel to the first lens and two lenses. The second lens of the protruding bar, the slightly mirrored face of the large treaty, the booster is perpendicular to the linear light source .... Using the second lens and the situation with many lamps, the f amount of the second light emitting surface is increased, and the blur is used. It is also private to increase the number of lamp tube images. In this way, the luminous quality is further improved. &Quot; It is known that, in the third embodiment of the present invention, it is specific to the luminous f / ,,,, etc. behind the luminous surface structure. " The linear light source is configured by stacking a plurality of planar members :: Setting it = The light emitting surface structure is a blurring part for keeping the light from the linear light source. The linear members include: To blur the image of the lamp tube; and the degree of divergence of a lens face " official image " is arranged at a position where light from the mold passes through 13012pif.ptd 200420978 V. Description of the invention (5) ^^ There are formed a plurality of lens faces that extend approximately parallel to this surface, and the linear light source and the linear light source on the face hold the rigidity of the light emitting surface structure ::: is the thickest, and is formed. In this case, by increasing the number of lamp images formed by the blurring section and transparent material, it is possible to increase ^ = 2 and the lens section because the number of thick diffuser plates is used to maintain the development surface ::: Yi: The light loss of Shicheng is very large, but in the present invention, it is transparent because of the expansion of μ. For a thickness of several mm, it is roughly a loss of rigid parts, and the luminous efficiency is good. a is caused by light absorption. It is preferable that a diffusion film is used as the blur portion. In addition, in the fourth embodiment of the present invention, a light emitting device behind a smooth surface is used to reduce the light tube 4 = a method of ^^ ~ image after the lamp tube is left by the light disposed in the light tube, including: Make the blurred tube N like the f political chaos to blur the image of the tube; add to lighten up; = increase the direction of the surface by the lens ^ ^ ^ the image of the front tube. [Embodiment] Figure 乂 iV Λ? Shows a preferred embodiment of the present invention.光 装置 1。 Light device 1. A light tube 3 is provided in the light 2 of the direct-type backlight module for the light emitting display device:? Signature: It consists of a shell with an opening formed on the light-emitting surface. Shoot. ^ First, it was photographed on the LCD panel (pictured by Satellite TV) and it was' LCD display + strong, high brightness ^ Straight down type backlight module, requires a thin 13〇12Pif ptcj Page 9 200420978 V. Description of the invention (6) " " ------ The casing 2 is erected with a box shape that forms an upper opening from a side surface 2 of each side of the rectangular bottom surface 2a. The inside of the casing 2 uses a reflecting film 5, the inside surface of the casing 2, and a reflection surface where light is reflected toward the light emitting surface structure 4. They are composed of a tube 3, a can light source, and specifically. The lamp tube 3 is provided with a customer_α & & d-class in the casing 2, and each of the lamp tubes 3 is arranged with thousands of lamps each other. In the long direction of ^. ^ In lamp tube 3 in FIG. 1, it passes straight to the drawing surface. The structure I body 4 is composed of a plurality of planar members 11, 12, 13, and 14 being transparent. A transparent plate 12 is provided as the thickest member in the member. this

= Γ = 度 约 1 ~ 3 _ ′ is preferably about 2_. The surface materials 11, 1 3, and 1 4 other than the transparent plate 12 are individually f μ ^ 0.25 m. The specific thickness of the pull-tab-like shape is about the film-like planar members 11, 13, and 14 located at the opening of the casing 2, which has rigidity that can prevent the light-emitting surface structure 4 from being bent. In this regard, the most transparent plate 1 2 ′ has the same rigidity as the conventional diffuser plate to prevent bending. The transparent plate 12 can be acrylic, poly, or cyclopentadiene polymer (product name: Zeonor's by Zeon Corporation, etc., with the same transparency at high temperature (about 80 degrees Celsius) The shape can be maintained at the bottom. The transparent plate 12 can also be broken glass. Although it has such a thickness, the transparent plate 12 has almost no light loss due to its transparency. For this, traditionally, it has a ten-inch expansion, and the board is milk ... There will be a small amount of light absorption due to the diffusing agent and so on. Because the transparency of this embodiment is used, light loss can be prevented.

200420978 V. Description of the invention (7) The exit surface 1 2b which is opposite to the light-receiving surface 1 2 a on the side of the lamp tube 3 is formed by the first lens portion. The first lens portion 12b has a plurality of protrusions. The cross-section of the protruding bar is triangular or semi-circular, and is extended and protruded in a direction perpendicular to the paper surface of FIG. The protrusion is approximately parallel to the longitudinal direction of the lamp tube 3 in its longitudinal direction. ^ ^ In Figure 1, it is easy to understand that ′ is described as a large protrusion but is actually fine. As described above, the transparent plate 12 is composed of a planar member holding a lens as a reading surface portion. X, in figure i, for the shape of the cross-section of the protruding bar (taking the angle, angle 稜鏡) as an example. The first lens portion 12b may be formed integrally with the transparent plate 12, and the transparent plate 12 without the lens may be bonded to the lens portion (lens film) by using a UV-curable resin or the like. Transparent, section 12b, the lamp image on the light emitting surface is divided into a plurality of directions in the surface direction. The lamp image is divided in a direction D which is perpendicular to the longitudinal direction of the protruding line of the lens portion 12b. Since the protruding strips of the first lens portion 12b face the same direction as the rectangular f of the linear lamp tube 3, the linear lamp images corresponding to the respective lamp tubes 3 are divided into two in a direction perpendicular to the tube length direction!). Therefore, in the same way as the lamp official distance L 丨 becomes smaller when the lamp 3 is multiplied several times, the distance between the lamp images becomes smaller because the number of lamp images is doubled. FIG. 3 illustrates the principle of increasing the number of lamp images in FIG. 2, and the principle is considered as follows. The position B in FIG. 2 (the upper position of the lamp tube), as shown in FIG. 3B, the light from the obituary lamp officer 3 directly reaching the lens portion 1 2 b is approximately perpendicular to the surface of the lens portion 12 b. (Ii) The double reflection is not emitted. On the one hand, the positions A and C from the position B of the lamp directly upward are shown in Figs. 3A and 3C. Because of the zigzag of the protruding bar (稜鏡),

13012pif-Ptd Page 11 200420978-_ 5. Description of the invention (8) Shooting in the front direction. The photosynthesis from one lamp 3 is at the 8-2 position! The lamp image is scattered, and two lamp officer images are produced for each θ I. Also, because the difference between light and dark becomes smaller. And, the brightness of the official image is low, and the traditional light-emitting surface is straight down. / / Used, the traditional straight lens lens is raised to the brightness of the film, which is the mirror film [also known as Raise the front direction (the normal of the diffuser plate is two: the scattered light 'is in the brightness, but it is not used to divert the lamp tube: = diffuse and: the direction of the incident lens diaphragm, because _ # j 1 special ,, First, at the positions of A, B, and C in Figure 2, the light that diffuses in all directions on the light-emitting surface, the lens film, is made by M. For the twists and turns of 3A, 3B), the light is collected in the front direction = light collection Function, but there is no function to disperse the lamp image. The lens diaphragm has a direct light type backlight module and a set of 3 light-dimensional i-faces, which are known from ancient times. Because the light from the lamp tube and the linearity are maintained, the person shoots the light shirt of the lens department. For example, the lens portion 12b is regarded as a function of dispersing the image of the lamp tube. 9. The light-transmitting surface 1 2a side of the Lu transparent plate 12 is provided with an i-th diffusion% film diffusion film 11. Among the materials 13 and U constituting the light-emitting surface structure 4, it is from the lamp tube 3. The light is initially arranged on the 3 side of the human torch. As for the first diffusion film n, if the light is taken away from the lamp y, it will spread and scatter, and the diffuser film 11 with the image of the lamp tube blurred / direct is used as the blur part. However, due to the fact that the heat is confessed / \ § § "Brother's thin, there is no strong elimination such as thick diffuser plate; Qiyue ^ film Germany film non ^ month 1 display lamp official image diffusion 13012pif.ptd 200420978 V. Description of the invention (9) function, but the image of the tube remains. As the first diffusion film 11, a high haze (h a z e) value is preferable, and a specific haze value of 80% or more is preferable. As such a diffusion membrane 11, BS-04, # 1 〇〇-KBS2 manufactured by Huihe Co., Ltd., and 100GM2 and 188GM2 manufactured by KM0T0 Dream Co., Ltd., and 117117Eγ manufactured by SUJIDEN Co., Ltd. can be used. Wait. 〆 疋 In order to enhance the blurring ability of the first diffusion film π, a fine unevenness is formed on the light incident surface 12a of the transparent plate lj. This unevenness is used to blur the image of the lamp. The fine unevenness of the transparent plate 12 can be formed by sandblasting the area corresponding to the light incident surface 12a of the mold for forming the transparent plate 12 by sandblasting. In addition, as for the blurred portion provided on the transparent plate j2, in addition to the uneven shape, white dots printed on the light incident surface 12a can be used. The application of diffusion beads' has the adhesion of the diffusion member. In addition, when the light incident surface 12a provided on the two bright plates 12 is used as the blurring part, the " wide diffusion film can omit 0 incident: = == the light difference between the brightness and darkness of the tube image in the blurred state, so that Yanji = Second =, / Brother M 2b, because the first lens part 12b divides the blurred image and shirt image into multiple ones, only the light-emitting surface of Sakata Bayi is uniform. We can use the image of the dispersing lamp tube to also make the plate 12: transparent ::: 2 :: wide: ㈣ between the mirror and the coffee 'use the light diffused by the transparent part η to reach the transparent reason; bright / the existence' use blur When the delay occurs, it can be increased; 1 When the paste = ，, the position in the plane direction will be a small distance between the plurality of lamps 3, and the situation from the lamp 3 to the

200420978 V. Description of the Invention (ί) Cases where the distance between the glossy structures 4 is large, etc. 'In the case where only the image of the tube is weakened, the first diffuser plate 11 and the transparent plate 12 can be used to obtain good light emission. quality. However, for the present invention, because the distance L 1 of the lamp tube 3 is kept large (about 25 mm), the distance L 2 between the bottom of the reflecting surface 5 and the light emitting surface body 4 is relatively small (about 10 mm). , The tube image appears stronger. Therefore, the second blurring portion and the second lens portion described later are used to achieve good light emission quality. In 4 Liang, specifically, on the light emitting surface 1 2 b side of the transparent plate 2, a second diffusion film 1 3 is disposed. The light emitted from the first lens portion J 2b is incident on the second diffusion film s sheet,

13 ° This second diffusion film 13 is the same as the second diffusion film 11 and serves as a blurring portion that blurs the light and dark of the total image of the lamp. Due to the arrangement of the second diffusion film, the uniformity of light is promoted. For this purpose, the second diffusion film 1 3 has a high blur value, and more specifically, a blur value of 80% or more is better. The diffusing membrane 13 may be BS—〇4, # 100-KBS2 manufactured by Huihe Co., Ltd., 100GM2, 188GM2 manufactured by KIMOTO Co., Ltd., D117UEY manufactured by TSUJIDEN, or D120. The upper surface of the diaphragm 13 is further equipped with a lens diaphragm (prism-shaped film: 2 diffuser diaphragm 1 3, and the light emitted from the '3' is incident on the lens diaphragm i 4. # 朵 二, the second diffuser diaphragm 1 3 is on the light emitting surface Among the structures 4, the final position of the planar member H is represented by H :. The second diffusion film 13 is from the lens film 14. In this embodiment, the second diffusion film 13 is on the light-emitting surface. The structure 4 is applied, and the surface of Qiu Bi Bi %% @ 中 疋 is used as the final position of the planar W material to homogenize the light. Through the bell gland Η〗 4 and Washan Zhi ^, the mirror diaphragm 14 is broken So that the surface on which the lens is formed is the light-emitting side (the upper side of the //,, and + ports in Figure 1). The lens diaphragm 14 is triangular in cross section.

200420978

-A plurality of protruding strips of the round shape are formed with a flat surface of the long direction of the lamp tube 3 and the protruding portion of the first lens portion 1 2 b ^ ^ having a lens-shaped member. In this way, the lens diaphragm 14 is constituted by the second lens portion as a lens diaphragm = lens portion (second lens portion). βΐ? ΐ7τ τπη / ΓΛ For example, the diaphragm W can be made of 3M, or the same company's BEFI 1 9 0/5 0. As a result, the second diffusion film 13 of the diaphragm round paste portion and the second lens portion of the second lens portion can be blurred into a large number, so that it is different from the first diffusion film 11 and the first lens portion 12b. In other words, the same machine uses the second diffusion film 13 to perform the tube image. The second lens film 14 is used to disperse the blurred tube image. As a result, the number of tube images is larger than that of the actual tube 3. The quantity is strict ... part or all of the image of the lamp tube and others: ° 1 to achieve uniform brightness. In this way, by making the lens part = scattered back and forth for many times, it is easy to increase the quality of the light tube. In addition, simply adding the lamp tube shadow ^ ^ said that the fork y has a strong tomorrow 9 is necessary to eliminate its diffusion plate: the strong diffusion effect may be necessary, because the lamp tube image of the politician k officer image The blurring is combined, and when the difference between light and dark is reduced, the number of lamp images is increased, and a uniform light emitting surface is easily obtained. In addition, as shown in FIG. 1, the aforementioned planar members u, 12, 13, and 14 are 5 for the homogenization of light, and are used as the light emitting surface structure 4, and one side is a protective lens film 14 (in the absence of In the case of the second lens diaphragm 14: 2), for the purpose of enhancing the power of "seeing the corner of the wild angle", it may also include other: For the purpose of protecting the lens, the sub-diaphragm can be used as a protective diaphragm, for example, low blur Value diffusion plate (such as pss — 〇10, manufactured by Huihe Co., Ltd.),

200420978 V. Description of the invention (12) # 100-BMU4S only). For the widening viewing angle, the protective film can be a diffuser with a blur value of 30% to 50%. For example, # 100-BMU4S, PBS- 0 6 0 manufactured by Huihe Co., Ltd. , Or 125TL4, etc. manufactured by KIMTOT0 Co., Ltd.) Example

In the direct type backlight module shown in FIG. 1, the housing 2 is an I Lu with a thickness of 丨 · 〇, the lamp tube 3 is a cold cathode lamp tube with a diameter of 3 mm, and the reflective film 5 is an E60V made by Toray. The diffusion film 11 is BS_〇4 manufactured by Huihe Co., Ltd., the transparent plate 12 is an acrylic transparent plate with a thickness of 2 mm, and the light incident surface of the transparent plate 12 is a concave-convex surface formed by sandblasting. The transparent plate Light-emitting surface of 12] ^!) Triangular protrusions with a top angle of 100 degrees' the width of each protrusion (the length of the bottom side of the triangle) is 70 micrometers, and the second diffusion film 13 is Huihe ( BS_〇4, lens film 14 is made of 3M BEFII 9 0/50, lamp tube distance L1 * 25_, between light emitting surface structure 4 (first diffusion film 11) and reflecting surface 5 The distance L 2 is J 0 mm, and the light emission quality of the light emission surface obtained by the light emission surface structure 4 is visually observed to measure the luminance. For a direct-type backlight module using a conventional diffuser plate, it is difficult to reduce the image of the lamp tube when L 2 is below the level of bandits. Although L 2 is not greater than 16 ·, good luminous quality cannot be obtained. It is also possible to obtain luminous quality if L2 is 〇0 or less. Moreover, high light uniformity can be confirmed. In addition, since no diffuser or light curtain is used, the light loss is small, and it is made of small L2, and a high luminance of 7500cd / m2 can be obtained. As described above, the present invention can achieve thinness, good light emitting quality, and

200420978 V. Description of the invention (13) High brightness. The present invention is not limited to the examples described above, but may be modified in various other ways. For example, when the light emitting surface structure does not require rigidity, the transparent plate 12 may be changed to a lens film. In this case, the light emitting surface structure is about 1 m m thin, and although it is thin, it can exert light uniformity. The light-emitting device of the present invention is not limited to the use of a liquid crystal display device, and may be used in a film viewer or a light-emitting sign.

13012pi f.ptd Page 17 200420978 Brief Description of Drawings Fig. 1 is a schematic cross-sectional view of a light emitting device according to an embodiment of the present invention. FIG. 2 illustrates the light dispersion effect using a lens. FIG. 3A is a schematic diagram of light refraction at the position A in FIG. 2. FIG. 3B is a schematic diagram of multiple light reflections at the position B in FIG. 2. FIG. 3C is a schematic diagram of light refraction at the position C in FIG. 2. [Illustration of diagrammatic symbols] 1 Light-emitting device 2 Housing 3 Light tube (linear light source) 4 Light-emitting surface structure 11 First diffuser plate (first blurred portion) 12 Transparent plate (first lens surface portion) 12b First lens portion 13 Second diffuser plate (second blurred portion) 14 lens diaphragm (second lens portion; second lens face portion)

13012pi f.ptd Page 18

Claims (1)

6. Scope of patent application1. A kind of light-emitting light — a blurring part is arranged behind the light-emitting surface, including: the degree of scattering to blur the image of the lamp tube left by the light from the lamp tube, # π ^ foot official image; and a transparent section, the mirror increases the number of images of the lamp tube that will be blurred in the direction of the plane. After passing through 2 · — a kind of light transmission, including: The light-emitting surface structure has a first diffusion film M-a first lens surface; light passes through and is formed with stripes; and a second diffusion film, which emits 0 Direct light from the linear light source can be made incident; a plurality of protrusions that can be arranged to allow the linear light source from the first diffusion film to extend slightly in parallel are arranged to allow light from the lens face to enter 3. The light-emitting device according to item 2 of the scope of the patent application, wherein A includes a second lens face portion arranged to allow light from the second diffusion film side to pass through, and is formed to extend slightly parallel to the linear light source 4. A light-emitting device comprising: 'a linear light source is disposed behind a light-emitting surface structure, the light-emitting surface is formed by stacking a plurality of planar members, and the planar members are] = A blurring part to scatter the lamp tube left by the light from the linear light source to this extent to blur the image of the lamp tube; and a lens face of the heart palate is arranged to pass the light from the blurring part and A plurality of protruding bars are formed to extend approximately parallel to the linear light source, ' 13012pi f.ptd Page 19 200420978 VI. Scope of patent application The lens face is the thickest in this planar material and is made of a plate-shaped transparent material that holds the rigidity of the light-emitting surface structure. 5. The light-emitting device according to any one of item 4 of the scope of patent application, wherein the blurred portion is a diffusion film. 6. A method for reducing an image of a lamp tube for a light-emitting device in which a lamp tube is disposed behind a light-emitting surface, comprising: dispersing a degree of a lamp image remaining from light from the lamp tube to blur the image of the lamp tube; and The number of blurred image of the lamp tube 13012pif.ptd Page 20