WO2013111472A1 - Method and device for creating light guide plate - Google Patents

Method and device for creating light guide plate Download PDF

Info

Publication number
WO2013111472A1
WO2013111472A1 PCT/JP2012/082473 JP2012082473W WO2013111472A1 WO 2013111472 A1 WO2013111472 A1 WO 2013111472A1 JP 2012082473 W JP2012082473 W JP 2012082473W WO 2013111472 A1 WO2013111472 A1 WO 2013111472A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
light
printing
ink
Prior art date
Application number
PCT/JP2012/082473
Other languages
French (fr)
Japanese (ja)
Inventor
要一 阿部
智雄 中嶋
Original Assignee
武藤工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 武藤工業株式会社 filed Critical 武藤工業株式会社
Publication of WO2013111472A1 publication Critical patent/WO2013111472A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0065—Manufacturing aspects; Material aspects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity

Definitions

  • the present invention relates to a method and an apparatus for producing a light guide plate used for a liquid crystal screen display device or the like.
  • Thinning the liquid crystal display devices such as current liquid crystal televisions and liquid crystal monitors is one of the issues, and a light guide plate used therefor is required to have a dot pattern that cannot be seen even if it is thin. Further, in order to obtain a good visual effect when the liquid crystal screen is viewed with eyes, there is a problem that it cannot be achieved only by making the reflection from the light guide plate uniform. In addition, a light guide plate with high luminance is also required from the aspect of brightness. The present invention aims to solve the above problems.
  • the present invention transfers printing data of a light reflection pattern stored in a computer to an ink jet printer, and prints a substantially rectangular shape surrounded by upper, lower, left and right edges of the light guide plate by the ink jet printer.
  • the reflection printing includes titanium oxide so that the print density increases from the four-direction edges corresponding to the edges to the high density setting points set in front of the facing edges. This is performed using white ink.
  • one of the four edge portions of the print data is used for light source placement, and the high density setting point is set as the light source placement edge portion and the opposite edge portion facing the edge portion.
  • the distance between them is 1, it is set to an arbitrary position that is less than 1 from the edge for arranging the light source and less than 1, and is set to be approximately the center between the remaining two other edges.
  • the present invention also comprises an ink jet printer and a computer for transferring the print data of the light reflection pattern to the printer. The print data of the light reflection pattern stored in the computer is transferred to the ink jet printer and guided by the ink jet printer.
  • the print data for printing is printed from the four-direction edge corresponding to the four-direction edge of the light guide plate toward the high-density setting point set in front of the opposite edge. Is designed to be high.
  • a pattern of print data whose density increases from the edge in the four directions toward the high density set point is formed by gradation processing. Further, the present invention is characterized in that the print data is created with reference to an ideal luminance distribution pattern required for the light guide plate.
  • the ink jet printer is provided with a white ink supply unit that stores a plurality of types of white ink for determining the color temperature of the light emitting surface of the light guide plate in an ink tank for each type.
  • a recording head is provided, and one of the ink tanks is connected to each recording head so that each recording head can eject different types of white ink, and the ink jet printer is connected to the light guide plate.
  • the reflection printing is formed, and a light guide plate having a color temperature corresponding to a selected combination of one type or a plurality of types of white ink is created.
  • the present invention is also characterized in that the plurality of types of white inks that determine the color temperature of the light emitting surface of the light guide plate have different particle size distributions of titanium oxide in the respective inks.
  • the present invention is also characterized in that the plurality of types of white inks for determining the color temperature of the light emitting surface of the light guide plate are different in content of titanium oxide in each ink.
  • a light guide plate having high brightness near the center when light is emitted from a peripheral portion with a light source such as an LED can be used, and a good visual effect can be obtained by using this for a liquid crystal screen display device.
  • a light guide plate that does not cause the appearance of a dot pattern can be provided by performing fine printing by changing the print density using an ink jet method using white ink using titanium oxide. Further, since the ink jet method is used, the thickness of the ink can be reduced, and bright surface emission can be provided by the light transmitted through and reflected by the light. By changing the content of titanium oxide, it becomes possible to cope with fine changes in luminance.
  • FIG. 1 and 3 are schematic views of a light guide plate printing apparatus including an inkjet printer 2 and a computer 4 such as a personal computer connected to a controller of the printer 2 via an input / output interface.
  • the light guide plate 6 is detachably held on the table 8 of the printing apparatus with the printing surface 6b on the back side of the light emitting surface 6a facing up.
  • Printing (printing) on the light guide plate 6 is performed in units of prints in which the horizontal rail 10 is set in one direction (sub-scanning direction) under the control of the printing apparatus main body drive unit.
  • the head carriage 20 including the ink jet recording heads 12, 14, 16, 18 is moved in the main scanning direction perpendicular to the conveying direction of the horizontal rail 10.
  • print data that ejects ink from the nozzles of the recording heads 12 to 18 and is transferred from the computer 4 to the controller of the ink jet printer 2 is stored in the controller. Is printed on the printing surface 6b of the light guide plate 6. Note that printing in the sentence is synonymous with printing.
  • the storage device of the computer 4 stores a print program for controlling the controller of the inkjet printer 2 and performing printing.
  • a horizontal rail 10 is arranged on the table 8 so as to be movable in the sub-scanning direction, and a head carriage 20 is connected to the horizontal rail 10 so as to be movable in the main scanning direction.
  • the head carriage 20 holds a plurality of ink jet recording heads 12, 14, 16, and 18 as shown in FIG.
  • Each recording head 12, 14, 16, 18 includes a large number of nozzles that eject ink. As shown in FIG. 4, each head 12, 14, 16, and 18 has an ink tank 22 corresponding to each of the white ink supply units A, B, C, and D each having an ink tank disposed in the body of the printer 2. , 24, 26, and 28 via an ink supply means such as a tube.
  • the plurality of recording heads 12, 14, 16, 18 are arranged in parallel so that their print areas overlap in the main scanning direction along the horizontal rail 10.
  • the storage device of the computer 4 stores software (print program) for creating print data of the light reflection pattern, and an ink data table 30 is provided.
  • This data table 30 is used to create light guide plates with various color temperatures by printing a plurality of types of white inks A, B, C, and D individually or in combination on the light guide plate 6. In addition, combinations of color temperatures and inks A, B, C, and D are set in advance. By using this data table 30, light guide plates having various color temperatures can be easily created. It is.
  • white inks A and B indicate two types of inks having different color temperatures with respect to the particle diameter of titanium oxide
  • white ink C has a content of titanium oxide in white ink A.
  • a different white ink is shown, and a white ink D is a white ink having a titanium oxide content different from that of the white ink B.
  • the content of titanium oxide in the white ink is desirably 10% or less, and experimentally it is easy to control the fine gradation brightness change of the light-emitting surface of the light guide plate by lowering the titanium oxide content. It has been confirmed.
  • the printing program for printing control stored in the computer 4 is configured so that the ink data table 30 can be created and corrected.
  • the prepared light guide plate 6 is obtained by printing reflection dots or reflection gradation (fine dots such as frosted glass) on the plane portion of the printing surface 6b of the light guide plate such as a transparent acrylic plate. 7, by arranging a light source 40 made of a light emitter such as a cold-cathode tube or an LED in the thickness portion of the upper edge portion 32 of the rectangular light guide plate 6, the entire plane of the light emitting surface 6 a emits light. It looks like you are.
  • titanium oxide ink prepare white ink with different color temperature depending on the particle size distribution of titanium oxide in the ink, and if the dispersion of the particle size distribution is changed, there will be a difference in reflected light. There is a difference in color temperature. This is because the particle diameter of titanium oxide in the ink is different, so that the intensity of light scattered after printing differs depending on the wavelength of light, and as a result, the color temperature of the scattered light of the printed light guide plate is different.
  • White ink uses titanium oxide as an ink pigment. Titanium oxide particles have the property of reflecting light with a wavelength twice as large as the particle diameter, and as an ideal white ink, the distribution of titanium oxide particle diameter is uniform between 200 nm and 400 nm as shown in FIG. Is to exist. In this case, the color becomes white which uniformly reflects light 400 nm to 800 nm (visible light) having a wavelength twice as large as the particle diameter 200 nm to 400 nm.
  • the particle size distribution rarely exists uniformly at 200 nm-400 nm, (1) When there are many particles having a particle diameter of 200 nm (see FIG. 17), white ink that strongly reflects 400 nm light (short wavelength), and white ink that has a high color temperature and bluish. (2) When there are many particles having a particle diameter of 400 nm (see FIG. 18), the white ink strongly reflects 800 nm light (long wavelength), and the white ink has a low color temperature, red, yellow, or green.
  • a desired light wavelength region may be obtained by adding other particles, copper phthalocyanine, or the like.
  • FIGS. 16 to 18 are distribution image diagrams of the particle diameter of titanium oxide in the ink.
  • the horizontal axis represents the particle diameter, and the vertical axis represents the degree of distribution.
  • FIG. 16 shows an ideal distribution of titanium oxide particles in white ink
  • FIGS. 17 to 18 show an actual distribution of titanium oxide particles in white ink.
  • a small amount of copper phthalocyanine is added to the ink used in this embodiment.
  • the amount of this addition has been experimentally selected so that the color temperature of the ink can be easily controlled by selecting an appropriate amount experimentally.
  • the operator can select the white ink A, B, C, D by hitting the ink selection button 48 displayed on the display 46 of the computer 4 with a mouse or the like.
  • the mixing button 50 by operating the mixing button 50, the white ink can be mixed in a desired combination. It is also possible to specify a plurality of inks such as A and B, A and C, and to specify what ink is to be used in which print portion in correspondence with the created print data. .
  • FIG. 10 shows reflective surface print data 56 created on a computer using print data creation software for creating a reflection pattern of the light guide plate.
  • the print data 56 generated in the rectangular area according to the rectangular shape of the light guide plate is formed so that the print density (density) increases toward the high density setting point set in the rectangular area. Since the reflection pattern is printed on the light guide plate, printing is performed on the whole, and the gradation direction of the print density in the print is shown.
  • FIG. 10 is an example, and the shape and the like are not particularly limited thereto.
  • FIG. 20 shows a three-dimensional image of the print density (print density) of the print data 66. In the figure, the symbol P indicates a high density set point. The high density setting point indicates the highest density portion.
  • the high density setting point is one point, but is not particularly limited to one point.
  • numeral 1 indicates the light source direction
  • numerals 1 to 7 indicate that the distance between the light source side edge 60 of the print data 56 and the opposite edge 62 opposite thereto is divided into seven equal parts.
  • S1, S3 and S5 indicate the scale between the left and right edge portions 64 and 66.
  • the high density setting point P is set near the lower center of the rectangular area, and the part with the high print density is gathered at this point. It is necessary to increase the reflectivity as the distance from the light source increases. This is because there are parts that are affected by reflections that return from the other peripheral edges (see Fig. 7). good.
  • the print data 56 is created with a gradation pattern.
  • gradation refers to a print density change pattern formed by the gradation pattern generation mode of the print data creation software.
  • the print density can be changed between 0% and 100%.
  • FIG. 11 is an explanatory diagram of the density in the gradation pattern diagram. In FIG. 11, (A) is 0%, (B) is 25%, (C) is 50%, (D) is 75%, and (E). Indicates 100% concentration. Note that FIG. 11 is merely a simplified description. In actual printing, printing is performed with a large number of dots, so that the printing place is designated according to the resolution of the printer. Printing within an arbitrary range such as 0 to 100% is possible.
  • the first density changing portion forms a gradation pattern from the light source arrangement side edge 60 of the print data 56 in a state where the print density is low with respect to the high density set point set in the print area.
  • An arrow a indicates a state in the first density changing portion where the density increases from a low density state toward the arrow direction, that is, toward the high density setting point.
  • gradation is formed from a state in which the print density is reduced toward the high density set point in the print area within a relatively short range from the edge 62 on the side opposite to the light source arrangement side edge 60. As shown, it is formed by changing it until it becomes the darkest state.
  • An arrow b indicates a state in the second density changing portion where the density increases from a low density state toward the arrow direction, that is, toward the high density setting point. From both the left and right edge portions 64 and 66, the print density is changed from a light state to a darkest state so that a gradation pattern is gradually formed toward a high density set point in the print region within a relatively short range. Thus, the third density changing portion and the fourth density changing portion are formed.
  • An arrow c indicates a state in which the density is increased from a light state in the direction of the arrow in the third density changing part
  • an arrow d indicates a state in which the density is increased in the direction of the arrow from a light state in the fourth density changing part. .
  • the print data 56 is designed with reference to an ideal luminance distribution pattern diagram of the light guide plate prepared in advance.
  • FIG. 19 is a graph showing the relationship between dot density and luminance.
  • X indicates the light source direction
  • each horizontal axis indicates the distance from the light source.
  • the high density setting point is approximately in the middle between the left and right edges, and when the distance between the light source arrangement side edge 60 and the opposite edge 62 is 1, the distance from the edge 60 exceeds 1/2. Is set at an arbitrary position less than (that is, in front of the edge 62). In this embodiment, when the image is divided into seven equal parts, a peak of a high-density portion appears at a position about 6/7 from the edge 60.
  • the position depends on the material of the light guide plate used, the thickness, the type of ink, the brightness of the light source, and the like. For example, when the thickness of the light guide plate is reduced, a better result may be obtained by bringing the edge 62 closer to the center, such as 1/4 or 1/3. Also, the magnitude of the change in print density may be changed according to the conditions. In this example, the print density is changed toward the leading end portion of the high density portion, that is, the high density setting point P. However, the portion does not necessarily have to be in the leading end state as shown in FIG. You may make it change toward the above flat area
  • the high density setting point is approximately at the center between the left and right edges and between the edge 60 and the opposite edge 62. If the distance is set to 1, it is desirable to set the distance from the edge 62 to approximately 1 ⁇ 2.
  • the luminance is displayed in color (color).
  • FIG. 13 shows a luminance distribution pattern diagram of the light guide plate in the present embodiment, which is substantially coincident with an ideal luminance distribution pattern diagram as a reference.
  • the area a of the light emitting surface 6a of the light guide plate 6 has a luminance of 1000-1500 (unit candela per square meter), the area b has a luminance of 1500-2500, the area c has a luminance of 2500-3500, the area d has a luminance of 3500-4000, and the area e has The luminance is 4500-.
  • the light guide plate 6 having an ideal luminance distribution pattern shown in FIG. 13 is applied to a liquid crystal display device such as a liquid crystal television or a liquid crystal monitor having a prism sheet 68, a diffusion plate 70, and a reflection plate 44 as shown in FIG.
  • a liquid crystal display device such as a liquid crystal television or a liquid crystal monitor having a prism sheet 68, a diffusion plate 70, and a reflection plate 44 as shown in FIG.
  • the print data is transferred from the computer 4 to the printer 2, and after the data is processed by the printer 2, the horizontal rail 10 is conveyed and conveyed in the print width unit set in the sub-scanning direction, The head carriage 20 is driven in the main scanning direction, and printing is performed on the light guide plate 6 with white ink under the selected printing condition.
  • the thickness H of the ink dots 54 is set to 0.5 ⁇ m, which is much thinner than screen printing (about 100 ⁇ m).
  • the light guide plate 6 brighter than the conventional one can be obtained by the synergistic effect of the light reflected from the white ink dots and the light transmitted through the ink and reflected from the reflection plate 72.
  • the content of titanium oxide is adjusted so that the brightness can be easily controlled by fine gradation printing.
  • the amount of reflection is changed accordingly, so that it is possible to cope with fine changes, thereby facilitating control of the amount of reflected light and the amount of scattering.
  • the content of titanium oxide in the white ink is 10% or less.
  • white ink with a content of about 1% is also prepared for finer control.
  • the brightness can be easily controlled by fine gradation, and if the dot diameter of about 100 ⁇ m necessary to fill 360 dpi is used, the printing speed can be increased. Further, printing may be performed with a dot diameter of about 50 ⁇ m necessary for filling 720 dpi. In actual printing, printing is performed while the head is moving, so the ink dot diameter is elliptical. Therefore, the ink dot diameter can be filled even in a narrow width direction at the resolution used. Printing may be performed by combining the dot diameters. When printing on the light guide plate 6 is completed, the printed light guide plate 6 is mounted on the LED lighting stand 72 shown in FIG. 3, the LED is turned on, and the light emitting surface of the light guide plate 6 is photographed by the camera 74. Measure the brightness distribution.
  • Luminance data measured by the camera 74 (luminance is displayed in color) is displayed or printed out on the screen of the computer 4 as a luminance distribution pattern diagram, and compared with a reference ideal luminance distribution pattern diagram, and the light guide plate 6 If the luminance distribution matches or approximates the ideal luminance distribution pattern, the print data creation operation on the computer is completed. If satisfactory results are not obtained at this time, this operation is repeated until the print data is corrected and an ideal luminance distribution pattern is obtained. For example, in FIG. 13, when a portion with high luminance is slightly shifted downward, the print density of the print data corresponding to the print data shown in FIG. 10 is changed, or the position of the dark print portion is changed. Correct it a little upwards. It is also conceivable to change the type of ink used at that position and the ink dot diameter used.
  • the light source 40 is arranged on one edge 32 of the light guide plate 6, but as shown in FIG. 9, the light sources 40, 40 may be arranged on both edges 32, 34, There is no particular limitation on providing one light source.
  • the luminance distribution also changes, so a print pattern corresponding to the light distribution is required, and a portion having a high print density moves in the center direction in terms of data. Even if the luminance of the light source varies, a desired luminance distribution can be obtained by correcting the portion with the print pattern, and the difference between the light sources at both ends can be dealt with.
  • the medium is fixed and the apparatus in which the inkjet head moves is described.
  • the present invention is not limited to this, and printing is performed using an apparatus or a line head that performs printing by moving the medium. Any device that can perform printing by an ink jet method, such as a device that performs printing.
  • the inkjet printer can use a plurality of resolutions depending on the product specifications (for example, select and use a necessary print mode such as 180 to 1440 dpi), the resolution may be selected as necessary. .
  • Inkjet printer 4 Computer 6 Light guide plate 6a Light emitting surface 6b Printing surface 8 Table 10 Horizontal rail 12 Recording head 14 Recording head 16 Recording head 18 Recording head 20 Head carriage 22 Ink tank 24 Ink tank 26 Ink tank 28 Ink tank 30 Ink data table 32 Edge 34 Edge 36 Edge 38 Edge 40 Light source 42 Ink 44 Reflector 46 Display 48 Ink selection button 50 Mixing button 52 Print rate button 54 Ink dot 56 Print data 60 Edge 62 Edge 64 Edge 66 Edge 68 Prism sheet 70 Diffuser 72 LED lighting stand 74 Camera

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

The purpose of the present invention is to provide a light guide for a liquid crystal screen display device such that excellent visual effects are obtained. A light guide plate is created by transferring printing data for a light reflection pattern stored in a computer to an inkjet printer and carrying out reflective printing by an inkjet printer onto a substantially rectangular printing surface surrounded by top, bottom, left, and right edge parts of the light guide plate for random scattering of light output by a light source into the light guide plate. The printing data for carrying out the reflective printing is created such that the printing density increases from the edge parts thereof that correspond to the edge parts of the light guide plate in the four directions, toward respective high density setting points set so as to be positioned before the respective opposing edge parts that each face the edge parts in the four directions. The reflective printing is carried out using white ink that includes a titanium oxide.

Description

導光板作成方法及び装置Light guide plate creation method and apparatus
　本発明は液晶画面表示装置等に使用される導光板の作成方法及び装置に関する。 The present invention relates to a method and an apparatus for producing a light guide plate used for a liquid crystal screen display device or the like.
　透明なアクリル板などにインクジェットプリンタなどで印字（印刷）を行い、画素密度を操作して均一な反射をさせる導光板を作製することが従来知られており、また、印字密度などをＬＥＤなどの光源を設ける周縁部からの距離で変更させる技術も従来知られている（例えば特許文献１参照）。
　また、スクリーン印刷では、対応できる解像度の問題があり、これにより、ドットパターンが見えてしまういわゆるドットパターン見えの現象が起こることも知られている。それを回避するためには光拡散シートなどを使用することや微細なピッチにするとそれをなくせることも提案されている（例えば特許文献２参照）。 It is conventionally known to produce a light guide plate that prints (prints) on a transparent acrylic plate or the like with an inkjet printer or the like, and manipulates the pixel density to make uniform reflection. A technique of changing the distance by the distance from the peripheral edge where the light source is provided is also known (see, for example, Patent Document 1).
It is also known that screen printing has a resolution problem that can be dealt with, and this causes a so-called dot pattern appearance phenomenon in which the dot pattern is visible. In order to avoid this, it has been proposed to use a light diffusing sheet or the like, or to eliminate it when the pitch is fine (see, for example, Patent Document 2).
特開平９－６８６１４号公報JP-A-9-68614 特開２００１－９３３１９号公報JP 2001-93319 A
　現在の液晶テレビや液晶モニターなどの液晶画面表示装置では薄型化が一つの課題になっており、それに用いられる導光板としては、薄型になってもドットパターンが見えないものが求められている。また、液晶画面を目で見たときに良好な視覚効果を得られるためには、導光板からの反射を均一な反射とすることだけでは達成できないという問題点がある。
また、明るさの面からも輝度の高い導光板が求められている。
　本発明は、上記問題点を解決することを目的とする。 Thinning the liquid crystal display devices such as current liquid crystal televisions and liquid crystal monitors is one of the issues, and a light guide plate used therefor is required to have a dot pattern that cannot be seen even if it is thin. Further, in order to obtain a good visual effect when the liquid crystal screen is viewed with eyes, there is a problem that it cannot be achieved only by making the reflection from the light guide plate uniform.
In addition, a light guide plate with high luminance is also required from the aspect of brightness.
The present invention aims to solve the above problems.
　上記問題点を達成するため、本発明は、コンピュータに格納された光反射パターンの印字データをインクジェットプリンタに転送し、該インクジェットプリンタによって導光板の上下左右の縁部で囲まれた略矩形の印刷面に、光源から導光板の内部に出射される光を乱射させるための反射印刷を施し導光板を作成する方法であって、前記反射印刷を行うための印字データを、前記導光板の四方向の縁部に対応する四方向の縁部からそれぞれ対向する縁部の前方に位置して設定された高濃度設定ポイントに向けて印字の濃度が高くなるようにし、前記反射印刷を酸化チタンを含む白インクを使用して行うようにしたものである。
　また本発明は、前記印字データの四方向の縁部の中の１つの縁部を光源配置用とし、前記高濃度設定ポイントを、光源配置用縁部と該縁部に対向する反対側縁部間の距離を１としたとき、光源配置用縁部から距離１／２を越え1に満たない任意の位置に設定し、且つ残る２つの他の縁部間の略中央となるように設定したものである。
　また本発明は、インクジェットプリンタと該プリンタに光反射パターンの印字データを転送するためのコンピュータとから成り、コンピュータに格納された光反射パターンの印字データをインクジェットプリンタに転送し、該インクジェットプリンタによって導光板の印刷面に、光源から導光板の内部に出射された光を乱射させるための反射印刷を酸化チタンを含む白インクを使用して施し、導光板を作成する装置であって、前記反射印刷を行うための印字データを、前記導光板の四方向の縁部に対応する四方向の縁部からそれぞれ対向する縁部の前方に位置して設定された高濃度設定ポイントに向けて印字の濃度が高くなるようにしたものである。
　また本発明は、前記四方向の縁部から前記高濃度設定ポイントに向けて濃度が高くなる印字データのパターンがグラデーション処理により形成されるようにしたものである。
　また本発明は、前記印字データを、導光板に求められる理想的な輝度分布パターンを参照して作成したことを特徴とする。
　また本発明は、前記白インクの酸化チタンの含有量の割合を１０％以下としたことを特徴とする。
　また本発明は、前記白インクに銅フタロシアニンを添加したことを特徴とする。
　また本発明は、前記インクジェットプリンタに、前記導光板の発光面の色温度を決定する複数種類の白インクを種類ごとにインクタンクに収納した白インク供給部を設け、前記インクジェットプリンタに複数個の記録ヘッドを設け、前記各記録ヘッドに前記インクタンクの中の１つをそれぞれ接続して、各記録ヘッドが互いに種類の異なる白インクを吐出できるように成し、前記インクジェットプリンタが前記導光板に前記反射印刷を形成して、選択した一種類または複数種類の白インクの組み合わせに対応する色温度を備えた導光板を作成するようにしたことを特徴とする。
　また本発明は、前記導光板の発光面の色温度を決定する複数種類の各白インクは、それぞれのインク中の酸化チタンの粒子径の分布が異なっていることを特徴とする。
　また本発明は、前記導光板の発光面の色温度を決定する複数種類の各白インクは、それぞれのインク中の酸化チタンの含有量が異なっていることを特徴とする。 In order to achieve the above problems, the present invention transfers printing data of a light reflection pattern stored in a computer to an ink jet printer, and prints a substantially rectangular shape surrounded by upper, lower, left and right edges of the light guide plate by the ink jet printer. A method of creating a light guide plate by performing reflection printing for scattering light emitted from a light source to the inside of the light guide plate on a surface, and printing data for performing the reflection printing is performed in four directions of the light guide plate The reflection printing includes titanium oxide so that the print density increases from the four-direction edges corresponding to the edges to the high density setting points set in front of the facing edges. This is performed using white ink.
Further, according to the present invention, one of the four edge portions of the print data is used for light source placement, and the high density setting point is set as the light source placement edge portion and the opposite edge portion facing the edge portion. When the distance between them is 1, it is set to an arbitrary position that is less than 1 from the edge for arranging the light source and less than 1, and is set to be approximately the center between the remaining two other edges. Is.
The present invention also comprises an ink jet printer and a computer for transferring the print data of the light reflection pattern to the printer. The print data of the light reflection pattern stored in the computer is transferred to the ink jet printer and guided by the ink jet printer. A device for producing a light guide plate by applying a reflection print for scattering light emitted from a light source to the inside of the light guide plate on a printing surface of the light plate using a white ink containing titanium oxide. The print data for printing is printed from the four-direction edge corresponding to the four-direction edge of the light guide plate toward the high-density setting point set in front of the opposite edge. Is designed to be high.
According to the present invention, a pattern of print data whose density increases from the edge in the four directions toward the high density set point is formed by gradation processing.
Further, the present invention is characterized in that the print data is created with reference to an ideal luminance distribution pattern required for the light guide plate.
In the invention, it is preferable that the content ratio of titanium oxide in the white ink is 10% or less.
Further, the present invention is characterized in that copper phthalocyanine is added to the white ink.
According to the present invention, the ink jet printer is provided with a white ink supply unit that stores a plurality of types of white ink for determining the color temperature of the light emitting surface of the light guide plate in an ink tank for each type. A recording head is provided, and one of the ink tanks is connected to each recording head so that each recording head can eject different types of white ink, and the ink jet printer is connected to the light guide plate. The reflection printing is formed, and a light guide plate having a color temperature corresponding to a selected combination of one type or a plurality of types of white ink is created.
The present invention is also characterized in that the plurality of types of white inks that determine the color temperature of the light emitting surface of the light guide plate have different particle size distributions of titanium oxide in the respective inks.
The present invention is also characterized in that the plurality of types of white inks for determining the color temperature of the light emitting surface of the light guide plate are different in content of titanium oxide in each ink.
　本発明は、ＬＥＤなどの光源で周縁部から発光をさせたときに中心付近での輝度が高くなった導光板を作成できるので、これを液晶画面表示装置に用いることで良好な視覚効果を得ることができる。
　また、酸化チタンを使用した白インクを用いてインクジェット方式で微細な印刷を印字密度を変更させて印刷を行うことによりドットパターン見えの起こらない導光板を提供することができる。また、インクジェット方式のためインクの厚さも薄くでき、光の透過する部分と反射してくる部分の光により明るい面発光を提供することができる。酸化チタンの含有量を変更することにより、微細な輝度の変更にも対応が出来るようになる。 According to the present invention, a light guide plate having high brightness near the center when light is emitted from a peripheral portion with a light source such as an LED can be used, and a good visual effect can be obtained by using this for a liquid crystal screen display device. be able to.
In addition, a light guide plate that does not cause the appearance of a dot pattern can be provided by performing fine printing by changing the print density using an ink jet method using white ink using titanium oxide. Further, since the ink jet method is used, the thickness of the ink can be reduced, and bright surface emission can be provided by the light transmitted through and reflected by the light. By changing the content of titanium oxide, it becomes possible to cope with fine changes in luminance.
本装置のブロック説明図である。It is block explanatory drawing of this apparatus. 本発明の説明図である。It is explanatory drawing of this invention. 本発明の説明図である。It is explanatory drawing of this invention. 本発明の説明図である。It is explanatory drawing of this invention. 導光板の説明図である。It is explanatory drawing of a light-guide plate. 導光板の説明図である。It is explanatory drawing of a light-guide plate. 導光板の説明図である。It is explanatory drawing of a light-guide plate. 液晶画面表示装置の一部の説明図である。It is explanatory drawing of a part of liquid crystal screen display apparatus. 導光板の説明図である。It is explanatory drawing of a light-guide plate. 本発明の説明図である。It is explanatory drawing of this invention. 本発明の説明図である。It is explanatory drawing of this invention. 本発明の説明図である。It is explanatory drawing of this invention. 本発明の説明図である。It is explanatory drawing of this invention. 本発明の説明図である。It is explanatory drawing of this invention. 本発明の説明図である。It is explanatory drawing of this invention. 本発明の説明図である。It is explanatory drawing of this invention. 本発明の説明図である。It is explanatory drawing of this invention. 本発明の説明図である。It is explanatory drawing of this invention. 本発明の説明図である。It is explanatory drawing of this invention. 本発明の説明図である。It is explanatory drawing of this invention.
　以下に本発明の構成を添付した図面を参照して、詳細に説明する。
図１及び図３は、インクジェットプリンタ２と該プリンタ２のコントローラに入出力インターフェイスを介して接続するパーソナルコンピュータなどのコンピュータ４とからなる導光板印字装置の概略図を示している。図５に示すように、導光板６は発光面６ａに対して裏側の印字面６ｂを上にして印字装置のテーブル８上に脱着可能に保持される。 Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
1 and 3 are schematic views of a light guide plate printing apparatus including an inkjet printer 2 and a computer 4 such as a personal computer connected to a controller of the printer 2 via an input / output interface. As shown in FIG. 5, the light guide plate 6 is detachably held on the table 8 of the printing apparatus with the printing surface 6b on the back side of the light emitting surface 6a facing up.
導光板６に対する印字（印刷）は、印字装置本体駆動部の制御により、横レール１０が一方向（副走査方向）に設定された印字単位で送られる一方、この横レール１０に沿って、ヘッドキャリッジ駆動部の制御により、インクジェット記録ヘッド１２，１４，１６，１８を備えたヘッドキャリッジ２０が前記横レール１０の搬送方向とは直角な主走査方向に移動して行われる。前記ヘッドキャリッジ２０が主走査方向に移動するとき、記録ヘッド１２～１８のノズルからインクを吐出し、コンピュータ４からインクジェットプリンタ２のコントローラに転送される印字データが、該コントローラに格納されたソフトウエアの制御により、導光板６の印刷面６ｂ上に印字される。尚、文中の印字は印刷と同義である。 Printing (printing) on the light guide plate 6 is performed in units of prints in which the horizontal rail 10 is set in one direction (sub-scanning direction) under the control of the printing apparatus main body drive unit. Under the control of the carriage drive unit, the head carriage 20 including the ink jet recording heads 12, 14, 16, 18 is moved in the main scanning direction perpendicular to the conveying direction of the horizontal rail 10. When the head carriage 20 moves in the main scanning direction, print data that ejects ink from the nozzles of the recording heads 12 to 18 and is transferred from the computer 4 to the controller of the ink jet printer 2 is stored in the controller. Is printed on the printing surface 6b of the light guide plate 6. Note that printing in the sentence is synonymous with printing.
コンピュータ４の記憶装置には、インクジェットプリンタ２のコントローラを制御し、印字を行うための印刷プログラムが格納されている。テーブル８上には、横レール１０が副走査方向に平行移動可能に配置され、該横レール１０にヘッドキャリッジ２０が主走査方向に移動自在に連結している。このヘッドキャリッジ２０には、図４に示すように複数個のインクジェット記録ヘッド１２，１４，１６，１８が保持されている。 The storage device of the computer 4 stores a print program for controlling the controller of the inkjet printer 2 and performing printing. A horizontal rail 10 is arranged on the table 8 so as to be movable in the sub-scanning direction, and a head carriage 20 is connected to the horizontal rail 10 so as to be movable in the main scanning direction. The head carriage 20 holds a plurality of ink jet recording heads 12, 14, 16, and 18 as shown in FIG.
各記録ヘッド１２，１４，１６，１８は、インクを吐出する多数個のノズルを備えている。各ヘッド１２，１４，１６，１８は、図４に示すように、それぞれプリンタ２の機体に配設されたインクタンクを備えた白インク供給部Ａ，Ｂ，Ｃ，Ｄの対応するインクタンク２２，２４，２６，２８にチューブなどのインク供給手段を介して連通している。複数個の記録ヘッド１２，１４，１６，１８は、横レール１０に沿った主走査方向に互いの印字領域が重なるように並列配置されている。 Each recording head 12, 14, 16, 18 includes a large number of nozzles that eject ink. As shown in FIG. 4, each head 12, 14, 16, and 18 has an ink tank 22 corresponding to each of the white ink supply units A, B, C, and D each having an ink tank disposed in the body of the printer 2. , 24, 26, and 28 via an ink supply means such as a tube. The plurality of recording heads 12, 14, 16, 18 are arranged in parallel so that their print areas overlap in the main scanning direction along the horizontal rail 10.
コンピュータ４の記憶装置には、光反射パターンの印字データ作成用のソフトウエア（印字プログラム）が格納されるとともに、インクデータテーブル３０が設けられている。このデータテーブル３０は、複数種類揃えた白インクＡ，Ｂ，Ｃ，Ｄを、個々または組み合わせて導光板６に印字を行うことにより、多種の色温度の導光板の作成ができるようにするために、色温度とインクＡ，Ｂ，Ｃ，Ｄとの組み合わせを予め設定したものであり、このデータテーブル３０を使用することにより、簡単に多種の色温度の導光板を作成することができるものである。 The storage device of the computer 4 stores software (print program) for creating print data of the light reflection pattern, and an ink data table 30 is provided. This data table 30 is used to create light guide plates with various color temperatures by printing a plurality of types of white inks A, B, C, and D individually or in combination on the light guide plate 6. In addition, combinations of color temperatures and inks A, B, C, and D are set in advance. By using this data table 30, light guide plates having various color temperatures can be easily created. It is.
図２において、白インクＡ，Ｂは、酸化チタンの粒子径に関して、インクの色温度の違う２種類のインクを示し、白インクＣは、白インクＡとはその中の酸化チタンの含有量が違う白インクを示し、白インクＤは、白インクＢとはその中の酸化チタンの含有量が違う白インクを示している。本実施形態では、酸化チタンの粒子径と含有量に関して複数種類の白インクを用意することで、簡単に複数の色温度での印字または、これらを組み合わせての印字を可能としている。白インク中の酸化チタンの含有量は、１０％以下が望ましく、酸化チタンの含有量を下げることで、導光板の発光面の微細なグラデーションの輝度の変化をコントロールし易くなることが実験的に確認されている。 In FIG. 2, white inks A and B indicate two types of inks having different color temperatures with respect to the particle diameter of titanium oxide, and white ink C has a content of titanium oxide in white ink A. A different white ink is shown, and a white ink D is a white ink having a titanium oxide content different from that of the white ink B. In this embodiment, by preparing a plurality of types of white ink with respect to the particle size and content of titanium oxide, printing at a plurality of color temperatures or a combination of these can be easily performed. The content of titanium oxide in the white ink is desirably 10% or less, and experimentally it is easy to control the fine gradation brightness change of the light-emitting surface of the light guide plate by lowering the titanium oxide content. It has been confirmed.
コンピュータ４に格納された印字制御用の印刷プログラムは、インクデータテーブル３０の作成、修正などを行うことができるように構成されている。作成された導光板６は、透明なアクリル板などの導光板の印刷面６ｂの平面部分に反射ドットまたは、反射グラデーション（曇りガラスのような細かいドット）を印字したものであり、図５～図７に示すように、矩形の導光板６の上部の縁部３２の厚み部分に冷陰極管やＬＥＤなどの発光体から成る光源４０を配置することにより、発光面６ａの平面全体が発光しているように見せるものである。 The printing program for printing control stored in the computer 4 is configured so that the ink data table 30 can be created and corrected. The prepared light guide plate 6 is obtained by printing reflection dots or reflection gradation (fine dots such as frosted glass) on the plane portion of the printing surface 6b of the light guide plate such as a transparent acrylic plate. 7, by arranging a light source 40 made of a light emitter such as a cold-cathode tube or an LED in the thickness portion of the upper edge portion 32 of the rectangular light guide plate 6, the entire plane of the light emitting surface 6 a emits light. It looks like you are.
光源３２から導光板６に出射された光は、導光板６の縁部３２から内部に入り、矢印で示されるように、内部で反射して導光板６全体に拡散する。光は上に抜けるものやあるいは、インク４２を抜けるものや、反射板４４から戻るもの、導光板６の縁部３４，３６，３８で反射するもの等があり、導光板６全体に拡散する。酸化チタンを用いたインクを使用する場合には、インク中の酸化チタンの粒子径の分布により、色温度の違う白インクを用意し、粒子径の分布のばらつきを変更すると、反射光に差が出て色温度に差が出る。これはインク中の酸化チタンの粒子径が異なるために印刷後、散乱する光の強度が光りの波長により異なり、結果、印刷された導光板の散乱光の色温度が異なるようになる。 The light emitted from the light source 32 to the light guide plate 6 enters the inside from the edge portion 32 of the light guide plate 6, is reflected inside and diffuses throughout the light guide plate 6 as indicated by arrows. There are light that escapes upward, light that passes through the ink 42, light that returns from the reflection plate 44, light that is reflected by the edge portions 34, 36, and 38 of the light guide plate 6, and the light diffuses throughout the light guide plate 6. When using titanium oxide ink, prepare white ink with different color temperature depending on the particle size distribution of titanium oxide in the ink, and if the dispersion of the particle size distribution is changed, there will be a difference in reflected light. There is a difference in color temperature. This is because the particle diameter of titanium oxide in the ink is different, so that the intensity of light scattered after printing differs depending on the wavelength of light, and as a result, the color temperature of the scattered light of the printed light guide plate is different.
［白インクと色温度について］
白インクは酸化チタンをインクの顔料としている。酸化チタンの粒子は粒子径の２倍の波長の光をもっとも強く反射する性質があり、白インクとしての理想は酸化チタンの粒子径の分布が、図１６に示すように、２００ｎｍ－４００ｎｍで均一に存在することである。その場合、粒子径２００ｎｍ－４００ｎｍの２倍の波長の光４００ｎｍ－８００ｎｍ（可視光）を均一に反射する白色になる。 [About white ink and color temperature]
White ink uses titanium oxide as an ink pigment. Titanium oxide particles have the property of reflecting light with a wavelength twice as large as the particle diameter, and as an ideal white ink, the distribution of titanium oxide particle diameter is uniform between 200 nm and 400 nm as shown in FIG. Is to exist. In this case, the color becomes white which uniformly reflects light 400 nm to 800 nm (visible light) having a wavelength twice as large as the particle diameter 200 nm to 400 nm.
しかし実際の白インクでは、粒子径の分布が、２００ｎｍ－４００ｎｍで均一に存在することは稀であり、
（１）粒子径２００ｎｍに多く存在する場合（図１７参照）、４００ｎｍの光（短波長）を強く反射する白インク、色温度が高く青みがかった白色のインクになる。
（２）粒子径４００ｎｍに多く存在する場合（図１８参照）、８００ｎｍの光（長波長）を強く反射する白インク、色温度が低く赤くまたは、黄、緑色かかった白インクになる。 However, in actual white ink, the particle size distribution rarely exists uniformly at 200 nm-400 nm,
(1) When there are many particles having a particle diameter of 200 nm (see FIG. 17), white ink that strongly reflects 400 nm light (short wavelength), and white ink that has a high color temperature and bluish.
(2) When there are many particles having a particle diameter of 400 nm (see FIG. 18), the white ink strongly reflects 800 nm light (long wavelength), and the white ink has a low color temperature, red, yellow, or green.
色温度の調整においては、これらの色温度の異なる（酸化チタンの分布が異なる）白インクの組み合わせによって、所望の色温度＝所望の酸化チタン分布＝所望の光の波長域、の導光板を作成する。しかしながら、酸化チタンの粒子径のみでの色温度の調整が難しい場合は、その他の粒子、銅フタロシアニンなどを加えることにより所望の光の波長域を得ることもある。 In adjusting the color temperature, a light guide plate having a desired color temperature = desired titanium oxide distribution = desired wavelength range of light is created by combining the white inks having different color temperatures (different titanium oxide distributions). To do. However, when it is difficult to adjust the color temperature only with the particle diameter of titanium oxide, a desired light wavelength region may be obtained by adding other particles, copper phthalocyanine, or the like.
図１６－図１８はインク中の酸化チタンの粒子径の分布イメージ図であり、横軸は粒径を示し、縦軸は分布の度合いを示している。図１６は、理想的な白インク中の酸化チタン粒子の分布を示し、図１７－図１８は、実際の白インク中の酸化チタン粒子の分布を示している。 FIGS. 16 to 18 are distribution image diagrams of the particle diameter of titanium oxide in the ink. The horizontal axis represents the particle diameter, and the vertical axis represents the degree of distribution. FIG. 16 shows an ideal distribution of titanium oxide particles in white ink, and FIGS. 17 to 18 show an actual distribution of titanium oxide particles in white ink.
本実施形態で使用されるインクには、銅フタロシアニンが微量に添加されている。この添加の量は、実験的に適量を選択することでインクの色温度のコントロールが容易となる実験結果を得ている。導光板６への印字に際し、操作者は、コンピュータ４のディスプレイ４６に表示されるインク選択ボタン４８をマウスなどによりヒットすることで、白インクＡ，Ｂ，Ｃ，Ｄの選択を行うことができ、また、混合ボタン５０を操作することで、白インクを所望の組み合わせて混合させることができるように構成されている。またＡとＢ、ＡとＣなどのインクを複数個指定する事もでき、作成された印字データとの対応関係で、どの印字部分で何のインクを使用するかの指定もできるようにしてある。 A small amount of copper phthalocyanine is added to the ink used in this embodiment. The amount of this addition has been experimentally selected so that the color temperature of the ink can be easily controlled by selecting an appropriate amount experimentally. When printing on the light guide plate 6, the operator can select the white ink A, B, C, D by hitting the ink selection button 48 displayed on the display 46 of the computer 4 with a mouse or the like. In addition, by operating the mixing button 50, the white ink can be mixed in a desired combination. It is also possible to specify a plurality of inks such as A and B, A and C, and to specify what ink is to be used in which print portion in correspondence with the created print data. .
図１０は、導光板の反射パターンを作成するための印字データ作成ソフトウエアを用いてコンピュータ上に作成された反射面用印字データ５６を示している。導光板の矩形形状に応じて矩形の領域内に生成された印字データ５６は、その矩形領域内に設定した高濃度設定ポイントに向かって印字濃度（密度）が濃くなるように形成されている。導光板の反射パターンの印字であるため、全体への印字はされているものであり、その中での印字濃度のグラデーションの方向を示している。尚、図１０は一例でありとくに形状などはこれに限定されているものではない。図２０は、印字データ６６の印字濃度（印字密度）の具体的なイメージを立体的にし、図中、符号Ｐは、高濃度設定ポイントを示している。この高濃度設定ポイントは、最も高い濃度部分を示し、本実施形態では高濃度設定ポイントは一点であるが、一点に特に限定されるものではなく、図１０中、四方向にある程度の広がり（スペース）を有するようにしてもよい。尚、図２０中、数字１は光源方向を示し、数字１～７は印字データ５６の光源側縁部６０とこれと対向する反対側の縁部６２間を７等分したことを示している。また、Ｓ１，Ｓ３，Ｓ５は、左右の縁部６４，６６間の目盛りを示している。矩形領域内の下部中央付近に高濃度設定ポイントＰが設定されており、このポイントに印字密度の濃い部分が集まるようにしたのは、光源からの部分は遠くなるほど反射率などを上げる必要が出てくるからであるが、その他の周端部に関しては端部から戻ってくる反射の影響を受ける部分もあるため（図7参照)、その部分を考慮して印字パターンのデータを作成しても良い。 FIG. 10 shows reflective surface print data 56 created on a computer using print data creation software for creating a reflection pattern of the light guide plate. The print data 56 generated in the rectangular area according to the rectangular shape of the light guide plate is formed so that the print density (density) increases toward the high density setting point set in the rectangular area. Since the reflection pattern is printed on the light guide plate, printing is performed on the whole, and the gradation direction of the print density in the print is shown. FIG. 10 is an example, and the shape and the like are not particularly limited thereto. FIG. 20 shows a three-dimensional image of the print density (print density) of the print data 66. In the figure, the symbol P indicates a high density set point. The high density setting point indicates the highest density portion. In the present embodiment, the high density setting point is one point, but is not particularly limited to one point. In FIG. ). In FIG. 20, numeral 1 indicates the light source direction, and numerals 1 to 7 indicate that the distance between the light source side edge 60 of the print data 56 and the opposite edge 62 opposite thereto is divided into seven equal parts. . S1, S3 and S5 indicate the scale between the left and right edge portions 64 and 66. The high density setting point P is set near the lower center of the rectangular area, and the part with the high print density is gathered at this point. It is necessary to increase the reflectivity as the distance from the light source increases. This is because there are parts that are affected by reflections that return from the other peripheral edges (see Fig. 7). good.
印字データ５６は、グラデーションパターンにより作成されている。ここでグラデーションとは、印字データ作成ソフトのグラデーションパターン生成モードにより形成される印字濃度変化パターンのことを言う。グラデーションパターンの作図において、印字密度は、０％から１００％の間で変化させることができる。図１１は、グラデーションパターン図における濃度の説明図であり、図１１中（Ａ）は０％、（Ｂ）は２５％、（Ｃ）は５０％、（Ｄは）は７５％、（Ｅ）は１００％の濃度をそれぞれ示している。なお図１１は単に簡略して説明をしただけのものであり、実際の印字では多数のドットにて印字がされるものであるためプリンタの解像度により印字される場所に関しての指定がされ、その範囲内で０～１００％などの任意の範囲での印字が可能である。 The print data 56 is created with a gradation pattern. Here, gradation refers to a print density change pattern formed by the gradation pattern generation mode of the print data creation software. In drawing a gradation pattern, the print density can be changed between 0% and 100%. FIG. 11 is an explanatory diagram of the density in the gradation pattern diagram. In FIG. 11, (A) is 0%, (B) is 25%, (C) is 50%, (D) is 75%, and (E). Indicates 100% concentration. Note that FIG. 11 is merely a simplified description. In actual printing, printing is performed with a large number of dots, so that the printing place is designated according to the resolution of the printer. Printing within an arbitrary range such as 0 to 100% is possible.
印字データ５６において、第１の濃度変化部は、印字データ５６の光源配置側縁部６０から、印字領域に設定した高濃度設定ポイントに対して印字濃度を薄い状態から、グラデーションパターンが形成されるように、最も濃い状態に変化させて形成する。矢印ａは第１の濃度変化部において、濃度が薄い状態から矢印の方向即ち高濃度設定ポイントに向かって濃くなる様子を示している。
第２の濃度変化部は、光源配置側縁部６０とは反対側の縁部６２から、比較的短い範囲で、印字領域の高濃度設定ポイントに向かって印字濃度を薄い状態から、グラデーションが形成されるように、最も濃い状態になるまで変化させて形成する。 In the print data 56, the first density changing portion forms a gradation pattern from the light source arrangement side edge 60 of the print data 56 in a state where the print density is low with respect to the high density set point set in the print area. As shown in FIG. An arrow a indicates a state in the first density changing portion where the density increases from a low density state toward the arrow direction, that is, toward the high density setting point.
In the second density change portion, gradation is formed from a state in which the print density is reduced toward the high density set point in the print area within a relatively short range from the edge 62 on the side opposite to the light source arrangement side edge 60. As shown, it is formed by changing it until it becomes the darkest state.
矢印ｂは、第２の濃度変化部において、濃度が薄い状態から矢印の方向即ち高濃度設定ポイントに向かって濃くなる様子を示している。左右両側の縁部６４，６６からも、比較的短い範囲で印字領域の高濃度設定ポイントに向かって印字濃度を薄い状態からなだらかにグラデーションパターンが形成されるように最も濃い状態になるまで変化させて、第３濃度変化部と第４濃度変化部を形成する。矢印ｃは第３濃度変化部において、濃度が薄い状態から矢印の方向に濃くなる様子を示し、矢印ｄは第４濃度変化部において濃度が薄い状態から矢印の方向に濃くなる様子を示している。 An arrow b indicates a state in the second density changing portion where the density increases from a low density state toward the arrow direction, that is, toward the high density setting point. From both the left and right edge portions 64 and 66, the print density is changed from a light state to a darkest state so that a gradation pattern is gradually formed toward a high density set point in the print region within a relatively short range. Thus, the third density changing portion and the fourth density changing portion are formed. An arrow c indicates a state in which the density is increased from a light state in the direction of the arrow in the third density changing part, and an arrow d indicates a state in which the density is increased in the direction of the arrow from a light state in the fourth density changing part. .
印字データ５６は、予め作成した導光板の理想的輝度分布パターン図を参照して設計する。図１９は、ドット密度と輝度との関連を示すグラフであり、図中、Ｘは、光源方向を示し、各横軸は光源からの距離を示している。高濃度設定ポイントは、左右縁部間のほぼ中央で且つ光源配置側縁部６０とその反対側の縁部６２との間の距離を１とすると、縁部６０から距離１／２を越え1に満たない任意の位置（即ち縁部６２の前方）に設定され、本実施形態では７等分をした場合に縁部６０から６／７程度の位置に高濃度の部分のピークがきているが、この位置は使用をする導光板の材質、厚さ、インクの種類、光源の輝度などにより前後する。例えば導光板の厚さが薄くなった場合には、縁部６２から１／４、１／３などと中央付近に近づけた方が良い結果が出ていたりする。また印字濃度の変化させる大きさも条件により変更させると良い。今回は高濃度部分の先端部分即ち高濃度設定ポイントＰに向かって印字濃度の変化をさせているのだが、その部分は必ずしも図２０に示すように、先端状態である必要はなく、ある一定レベル以上の平坦な領域に向かって変化をさせるようにしても良い。
なお、上下の縁部６０，６２に光源が配置される印字の場合には、高濃度設定ポイントは、左右縁部間のほぼ中央で且つ縁部６０とその反対側の縁部６２との間の距離を１とすると、縁部６２から略１／２の距離に設定されることが望ましい。理想的輝度分布パターン図は、輝度がカラー（色）によって表示される。図１３は、本実施形態における導光板の輝度分布パターン図を示し、基準となる理想的輝度分布パターン図と略一致させている。 The print data 56 is designed with reference to an ideal luminance distribution pattern diagram of the light guide plate prepared in advance. FIG. 19 is a graph showing the relationship between dot density and luminance. In the figure, X indicates the light source direction, and each horizontal axis indicates the distance from the light source. The high density setting point is approximately in the middle between the left and right edges, and when the distance between the light source arrangement side edge 60 and the opposite edge 62 is 1, the distance from the edge 60 exceeds 1/2. Is set at an arbitrary position less than (that is, in front of the edge 62). In this embodiment, when the image is divided into seven equal parts, a peak of a high-density portion appears at a position about 6/7 from the edge 60. The position depends on the material of the light guide plate used, the thickness, the type of ink, the brightness of the light source, and the like. For example, when the thickness of the light guide plate is reduced, a better result may be obtained by bringing the edge 62 closer to the center, such as 1/4 or 1/3. Also, the magnitude of the change in print density may be changed according to the conditions. In this example, the print density is changed toward the leading end portion of the high density portion, that is, the high density setting point P. However, the portion does not necessarily have to be in the leading end state as shown in FIG. You may make it change toward the above flat area | region.
In the case of printing in which light sources are arranged on the upper and lower edges 60 and 62, the high density setting point is approximately at the center between the left and right edges and between the edge 60 and the opposite edge 62. If the distance is set to 1, it is desirable to set the distance from the edge 62 to approximately ½. In the ideal luminance distribution pattern diagram, the luminance is displayed in color (color). FIG. 13 shows a luminance distribution pattern diagram of the light guide plate in the present embodiment, which is substantially coincident with an ideal luminance distribution pattern diagram as a reference.
導光板６の発光面６ａのエリアａは輝度１０００～１５００（単位カンデラ/平方メートル以下同じ）、エリアｂは輝度１５００～２５００、エリアｃは輝度２５００～３５００、エリアｄは３５００～４０００、エリアｅは輝度４５００～である。 The area a of the light emitting surface 6a of the light guide plate 6 has a luminance of 1000-1500 (unit candela per square meter), the area b has a luminance of 1500-2500, the area c has a luminance of 2500-3500, the area d has a luminance of 3500-4000, and the area e has The luminance is 4500-.
図１３に示す、理想的な輝度分布パターンを備えた導光板６を図８に示すように、プリズムシート６８、拡散板７０、反射板４４を備えた液晶テレビや液晶モニターなどの液晶表示装置に用いると、中心の輝度が高く、端部になると少し輝度が低くなる人間の視覚に適合した最適な面発光装置を得ることができる。ソフトウエアで作成した反射用印字データを５６を、導光板６に印字する場合には、操作者は、使用するインクの種類又はインクの混合条件を選択して、これらをコンピュータ４に入力し印刷ボタンをクリックする。 The light guide plate 6 having an ideal luminance distribution pattern shown in FIG. 13 is applied to a liquid crystal display device such as a liquid crystal television or a liquid crystal monitor having a prism sheet 68, a diffusion plate 70, and a reflection plate 44 as shown in FIG. When used, it is possible to obtain an optimal surface light emitting device suitable for human vision, in which the luminance at the center is high and the luminance is slightly reduced at the end. When printing the reflection print data 56 created by software on the light guide plate 6, the operator selects the type of ink to be used or the ink mixing conditions and inputs them to the computer 4 for printing. Click the button.
これによりコンピュータ４からプリンタ２に印字データが転送され、その後、プリンタ２にてデータの処理がされた後に、横レール１０が副走査方向に設定がされた印字幅単位で搬送がされ搬送され、ヘッドキャリッジ２０が主走査方向に駆動されて導光板６に、選択された印字条件の白インクにて印字が実行される。本実施形態では、図１５に示すようにインクドット５４の厚さＨは、０，５μｍに設定され、スクリーン印刷（１００μｍ程度）に比べて非常に薄い。 As a result, the print data is transferred from the computer 4 to the printer 2, and after the data is processed by the printer 2, the horizontal rail 10 is conveyed and conveyed in the print width unit set in the sub-scanning direction, The head carriage 20 is driven in the main scanning direction, and printing is performed on the light guide plate 6 with white ink under the selected printing condition. In the present embodiment, as shown in FIG. 15, the thickness H of the ink dots 54 is set to 0.5 μm, which is much thinner than screen printing (about 100 μm).
これにより、白インクのドットから反射する光とそのインクを透過して反射板７２から反射してくる光との相乗効果で従来のものより明るい導光板６を得ることができる。印字に使用する白インクは微細なグラデーション印字による輝度のコントロールをし易くするために酸化チタンの含有量を調整している。酸化チタンの含有量を変更することにより、その分反射する量が変更されるので細かい変化に対応でき、それにより光の反射量や散乱量のコントロールを容易にしている。 Thereby, the light guide plate 6 brighter than the conventional one can be obtained by the synergistic effect of the light reflected from the white ink dots and the light transmitted through the ink and reflected from the reflection plate 72. In the white ink used for printing, the content of titanium oxide is adjusted so that the brightness can be easily controlled by fine gradation printing. By changing the content of titanium oxide, the amount of reflection is changed accordingly, so that it is possible to cope with fine changes, thereby facilitating control of the amount of reflected light and the amount of scattering.
微妙なこれらのコントロールをするには白インクの酸化チタンの含有量が１０％以下が望ましく、また本件ではさらに細かいコントロールをするために１％程度の含有量の白インクも用意し、個々の白インクや複数の白インクを組み合わせての使用により微細なグラデーションでの印字による輝度のコントロールを実現している。
　また複数のインク吐出用の印字波形や駆動電圧を利用してインク吐出量を制御しインクドット径の変更ができるインクジェットプリンタにおいては複数の解像度への対応ができるので、例えば解像度1440ｄｐｉを埋めるのに必要な25μｍ程度のドット径で印字を行えば微細なグラデーションによる輝度のコントロールが容易となり、また360ｄｐｉを埋めるのに必要な100μｍ程度のドット径を使用すれば印字速度を上げることもできる。また720ｄｐｉを埋めるのに必要な50μｍ程度のドット径で印字を行ってもよい。なお実際の印字においてはヘッドが移動しながら印字を行うのでインクドット径は楕円になるため、使用する解像度において狭い幅方向でも埋める事ができるインクドット径であれば良く、埋まらない場合には複数のドット径を組み合わせて印字を行っても良い。
導光板６への印字が完了したところで、印字した導光板６を図３に示すＬＥＤ点灯台７２に装着し、ＬＥＤを点灯させて、カメラ７４で導光板６の発光面を撮影し、発光面の明るさの分布を計測する。 In order to perform these subtle controls, it is desirable that the content of titanium oxide in the white ink is 10% or less. In this case, white ink with a content of about 1% is also prepared for finer control. By using a combination of ink and multiple white inks, brightness control is achieved by printing with fine gradation.
Ink jet printers that can change the ink dot diameter by controlling the ink discharge amount using a plurality of print waveforms and drive voltages for ink discharge can cope with a plurality of resolutions. For example, to fill a resolution of 1440 dpi If printing is performed with the required dot diameter of about 25 μm, the brightness can be easily controlled by fine gradation, and if the dot diameter of about 100 μm necessary to fill 360 dpi is used, the printing speed can be increased. Further, printing may be performed with a dot diameter of about 50 μm necessary for filling 720 dpi. In actual printing, printing is performed while the head is moving, so the ink dot diameter is elliptical. Therefore, the ink dot diameter can be filled even in a narrow width direction at the resolution used. Printing may be performed by combining the dot diameters.
When printing on the light guide plate 6 is completed, the printed light guide plate 6 is mounted on the LED lighting stand 72 shown in FIG. 3, the LED is turned on, and the light emitting surface of the light guide plate 6 is photographed by the camera 74. Measure the brightness distribution.
カメラ７４で測定した輝度データ（輝度がカラーで表示される）を、輝度分布パターン図としてコンピュータ４の画面に表示あるいはプリントアウトし、基準となる理想的輝度分布パターン図と比較し、導光板６の輝度分布が理想的な輝度分布パターンと一致または近似していれば、コンピュータ上での印字データ作成作業を完了する。このとき満足すべき結果が得られなければ、印字データを修正して、理想的な輝度分布パターンが得られるまで、この作業を繰り返す。例えば図１３にて輝度が高い部分が少し下方向にずれていた場合には、図１０で示す印字データにおける対応する部分の印字データの印字濃度を変更したり、印字濃度の濃い部分の位置を少し上方向に修正したりして対応する。またその位置で使用するインクの種類や使用するインクドット径を変更したりする対応も考えられる。 Luminance data measured by the camera 74 (luminance is displayed in color) is displayed or printed out on the screen of the computer 4 as a luminance distribution pattern diagram, and compared with a reference ideal luminance distribution pattern diagram, and the light guide plate 6 If the luminance distribution matches or approximates the ideal luminance distribution pattern, the print data creation operation on the computer is completed. If satisfactory results are not obtained at this time, this operation is repeated until the print data is corrected and an ideal luminance distribution pattern is obtained. For example, in FIG. 13, when a portion with high luminance is slightly shifted downward, the print density of the print data corresponding to the print data shown in FIG. 10 is changed, or the position of the dark print portion is changed. Correct it a little upwards. It is also conceivable to change the type of ink used at that position and the ink dot diameter used.
酸化チタンを使用した白インクを用いたインクジェット方式で微細な印字を印字密度を変更させて行う上記実施形態では、いわゆるドットパターン見え現象の起こらない導光板を提供することができる。また、インクの厚さもインクジェット方式では、薄くできるため透過する部分と反射してくる部分の光により、明るい面発光を提供できる。インクは色温度の違う白インクを複数用意しておくことで、簡単に複数の色温度での印字が可能になり、また組み合わせての印字も可能なので細かい色温度コントロールができる。 In the above-described embodiment in which fine printing is performed by changing the print density by an ink jet method using white ink using titanium oxide, a light guide plate that does not cause a so-called dot pattern appearance phenomenon can be provided. Further, since the ink thickness can be reduced in the ink jet system, bright surface emission can be provided by the light of the transmitting part and the reflecting part. By preparing multiple white inks with different color temperatures, it is possible to easily print at multiple color temperatures and to print in combination, so fine color temperature control is possible.
酸化チタンの含有量を少なくしている場合には、光の反射量の微細な変更を簡単に制御でき、また酸化チタンの含有量を変更させた白インクを複数設けても良く、また小さなドット径を使用して印字をする場合には更に細かい制御も可能になる。
本装置で作成した導光板を液晶表示装置などに使用した場合に使用者の条件に合えば拡散板などを無くす事も可能になるため、構造を減らすことでの薄型化も可能になる。またコスト的にも部品点数が削減できる。 When the content of titanium oxide is low, fine changes in the amount of reflected light can be easily controlled, and multiple white inks with a modified content of titanium oxide can be provided. When printing is performed using the diameter, finer control becomes possible.
When the light guide plate created by this apparatus is used for a liquid crystal display device or the like, it is possible to eliminate the diffusion plate or the like if the user's conditions are met. Therefore, the thickness can be reduced by reducing the structure. Also, the number of parts can be reduced in terms of cost.
上記実施形態では、導光板６の片方の縁部３２に光源４０を配置しているが、図９に示すように、両方の縁部３２，３４に光源４０，４０を配置しても良く、１つの光源を設けることに特に限定されるものではない。両方の端部に光源を設けた場合には輝度分布も変わるってくるためそれに合わせた印字パターンが必要になりデータ的には印字密度の高い部分が中心方向に移動する。なお光源の輝度にバラつきがあってもその部分を印字パターンでの修正により所望の輝度分布を得る事ができ、両端部での光源の差も対応する事が出来る。
なお本件は説明のために媒体を固定してインクジェットヘッドが移動する装置で説明をしているがそれに限定されるものでなく、媒体が移動して印字を行う装置やラインヘッドを使用して印字をおこなうものなど、インクジェット方式で印字ができるものであればよい。
またインクジェットプリンタでは製品の仕様によっては複数の解像度を使用する事ができるので、（例えば１８０～１４４０ｄｐｉなどの必要な印字モードを選択して使用）必要に応じて解像度を選択するようにしても良い。 In the above embodiment, the light source 40 is arranged on one edge 32 of the light guide plate 6, but as shown in FIG. 9, the light sources 40, 40 may be arranged on both edges 32, 34, There is no particular limitation on providing one light source. When the light sources are provided at both ends, the luminance distribution also changes, so a print pattern corresponding to the light distribution is required, and a portion having a high print density moves in the center direction in terms of data. Even if the luminance of the light source varies, a desired luminance distribution can be obtained by correcting the portion with the print pattern, and the difference between the light sources at both ends can be dealt with.
In this case, for the sake of explanation, the medium is fixed and the apparatus in which the inkjet head moves is described. However, the present invention is not limited to this, and printing is performed using an apparatus or a line head that performs printing by moving the medium. Any device that can perform printing by an ink jet method, such as a device that performs printing.
In addition, since the inkjet printer can use a plurality of resolutions depending on the product specifications (for example, select and use a necessary print mode such as 180 to 1440 dpi), the resolution may be selected as necessary. .
２　　　　インクジェットプリンタ
４　　　　コンピュータ
６　　　　導光板
６ａ　　　発光面
６ｂ　　　印刷面
８　　　　テーブル
１０　　　横レール
１２　　　記録ヘッド
１４　　　記録ヘッド
１６　　　記録ヘッド
１８　　　記録ヘッド
２０　　　ヘッドキャリッジ
２２　　　インクタンク
２４　　　インクタンク
２６　　　インクタンク
２８　　　インクタンク
３０　　　インクデータテーブル
３２　　　縁部
３４　　　縁部
３６　　　縁部
３８　　　縁部
４０　　　光源
４２　　　インク
４４　　　反射板
４６　　　ディスプレイ
４８　　　インク選択ボタン
５０　　　混合ボタン
５２　　　印字率ボタン
５４　　　インクドット
５６　　　印字データ
６０　　　縁部
６２　　　縁部
６４　　　縁部
６６　　　縁部
６８　　　プリズムシート
７０　　　拡散板
７２　　　ＬＥＤ点灯台
７４　　　カメラ 2 Inkjet printer 4 Computer 6 Light guide plate 6a Light emitting surface 6b Printing surface 8 Table 10 Horizontal rail 12 Recording head 14 Recording head 16 Recording head 18 Recording head 20 Head carriage 22 Ink tank 24 Ink tank 26 Ink tank 28 Ink tank 30 Ink data table 32 Edge 34 Edge 36 Edge 38 Edge 40 Light source 42 Ink 44 Reflector 46 Display 48 Ink selection button 50 Mixing button 52 Print rate button 54 Ink dot 56 Print data 60 Edge 62 Edge 64 Edge 66 Edge 68 Prism sheet 70 Diffuser 72 LED lighting stand 74 Camera

Claims (11)

  1. コンピュータに格納された光反射パターンの印字データをインクジェットプリンタに転送し、該インクジェットプリンタによって導光板の上下左右の縁部で囲まれた略矩形の印刷面に、光源から導光板の内部に出射される光を乱射させるための反射印刷を施し導光板を作成する方法であって、前記反射印刷を行うための印字データを、前記導光板の四方向の縁部に対応する四方向の縁部からそれぞれ対向する縁部の前方に位置して設定された高濃度設定ポイントに向けて印字の濃度が高くなるようにし、前記反射印刷を酸化チタンを含む白インクを使用して行うようにしたことを特徴とする導光板作成方法。 The print data of the light reflection pattern stored in the computer is transferred to the ink jet printer, and is emitted from the light source to the inside of the light guide plate on the substantially rectangular printing surface surrounded by the upper, lower, left and right edges of the light guide plate. A method of creating a light guide plate by performing reflection printing for scattering light, and printing data for performing the reflection printing from four-direction edges corresponding to the four-direction edges of the light guide plate The print density is increased toward the high density set point set in front of the opposing edges, and the reflection printing is performed using white ink containing titanium oxide. A light guide plate making method.
  2. 前記印字データの四方向の縁部の中の１つの縁部を光源配置用とし、前記高濃度設定ポイントを、光源配置用縁部と該縁部に対向する反対側縁部間の距離を１としたとき、光源配置用縁部から距離１／２を越え1に満たない任意の位置に設定し、且つ残る２つの他の縁部間の略中央となるように設定したことを特徴とする導光板作成方法。 One edge among the four edges of the print data is used for light source placement, and the high density setting point is set to a distance between the light source placement edge and the opposite edge opposite to the edge. Is set to an arbitrary position that is less than 1 from the light source placement edge and is set to be approximately the center between the remaining two other edges. Light guide plate creation method.
  3. インクジェットプリンタと該プリンタに光反射パターンの印字データを転送するためのコンピュータとから成り、コンピュータに格納された光反射パターンの印字データをインクジェットプリンタに転送し、該インクジェットプリンタによって導光板の印刷面に、光源から導光板の内部に出射された光を乱射させるための反射印刷を酸化チタンを含む白インクを使用して施し、導光板を作成する装置であって、前記反射印刷を行うための印字データを、前記導光板の四方向の縁部に対応する四方向の縁部からそれぞれ対向する縁部の前方に位置して設定された高濃度設定ポイントに向けて印字の濃度が高くなるようにしたことを特徴とする導光板作成装置。 An ink jet printer and a computer for transferring the print data of the light reflection pattern to the printer. The print data of the light reflection pattern stored in the computer is transferred to the ink jet printer, and the print surface of the light guide plate is transferred by the ink jet printer. A device for producing a light guide plate by applying a reflection print for scattering light emitted from a light source to the inside of the light guide plate using white ink containing titanium oxide, the print for performing the reflection print The print density is increased from the four-direction edge corresponding to the four-direction edge of the light guide plate toward the high-density setting point set in front of the opposite edge. The light-guide plate production apparatus characterized by the above-mentioned.
  4. 前記印字データの四方向の縁部の中の１つの縁部を光源配置用とし、前記高濃度設定ポイントを、光源配置用縁部と該縁部に対向する反対側縁部間の距離を１としたとき、光源配置用縁部から距離１／２を越え1に満たない任意の位置に設定し、且つ残る２つの他の縁部間の略中央となるように設定したことを特徴とする請求項３に記載の導光板作成装置。 One edge among the four edges of the print data is used for light source placement, and the high density setting point is set to a distance between the light source placement edge and the opposite edge opposite to the edge. Is set to an arbitrary position that is less than 1 from the light source placement edge and is set to be approximately the center between the remaining two other edges. The light guide plate creating apparatus according to claim 3.
  5. 前記四方向の縁部から前記高濃度設定ポイントに向けて濃度が高くなる印字データのパターンがグラデーション処理により形成されるようにしたことを特徴とする請求項３に記載の導光板作成装置。 The light guide plate creating apparatus according to claim 3, wherein a pattern of print data whose density increases from the edge in the four directions toward the high density setting point is formed by gradation processing.
  6. 前記印字データを、導光板に求められる理想的な輝度分布パターンを参照して作成したことを特徴とする請求項３に記載の導光板作成装置。 4. The light guide plate creating apparatus according to claim 3, wherein the print data is created with reference to an ideal luminance distribution pattern required for the light guide plate.
  7. 前記白インクの酸化チタンの含有量の割合を１０％以下としたことを特徴とする請求項３に記載の導光板作成装置。 The light guide plate creating apparatus according to claim 3, wherein a content ratio of titanium oxide in the white ink is 10% or less.
  8. 前記白インクに銅フタロシアニンを添加したことを特徴とする請求項３に記載の導光板作成装置。 The light guide plate creating apparatus according to claim 3, wherein copper phthalocyanine is added to the white ink.
  9. 前記インクジェットプリンタに、前記導光板の発光面の色温度を決定する複数種類の白インクを種類ごとにインクタンクに収納した白インク供給部を設け、前記インクジェットプリンタに複数個の記録ヘッドを設け、前記各記録ヘッドに前記インクタンクの中の１つをそれぞれ接続して、各記録ヘッドが互いに種類の異なる白インクを吐出できるように成し、前記インクジェットプリンタが前記導光板に前記反射印刷を形成して、選択した一種類または複数種類の白インクの組み合わせに対応する色温度を備えた導光板を作成するようにしたことを特徴とする請求項３に記載の導光板作成装置。 The ink jet printer is provided with a white ink supply unit that stores a plurality of types of white ink for determining the color temperature of the light emitting surface of the light guide plate in an ink tank, and the ink jet printer is provided with a plurality of recording heads. One of the ink tanks is connected to each of the recording heads so that each recording head can eject different types of white ink, and the inkjet printer forms the reflective printing on the light guide plate The light guide plate creating apparatus according to claim 3, wherein a light guide plate having a color temperature corresponding to a selected combination of one or a plurality of types of white ink is created.
  10. 前記導光板の発光面の色温度を決定する複数種類の各白インクは、それぞれのインク中の酸化チタンの粒子径の分布が異なっていることを特徴とする請求項３に記載の導光板作成装置。 4. The light guide plate according to claim 3, wherein the plurality of types of white inks that determine the color temperature of the light emitting surface of the light guide plate have different particle size distributions of titanium oxide in the respective inks. apparatus.
  11. 前記導光板の発光面の色温度を決定する複数種類の各白インクは、それぞれのインク中の酸化チタンの含有量が異なっていることを特徴とする請求項３に記載の導光板作成装置。 4. The light guide plate creation apparatus according to claim 3, wherein the plurality of types of white inks that determine the color temperature of the light emitting surface of the light guide plate are different in content of titanium oxide in each ink.
PCT/JP2012/082473 2012-01-24 2012-12-14 Method and device for creating light guide plate WO2013111472A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-011706 2012-01-24
JP2012011706A JP2013152785A (en) 2012-01-24 2012-01-24 Method and device for manufacturing light guide plate

Publications (1)

Publication Number Publication Date
WO2013111472A1 true WO2013111472A1 (en) 2013-08-01

Family

ID=48873212

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/082473 WO2013111472A1 (en) 2012-01-24 2012-12-14 Method and device for creating light guide plate

Country Status (3)

Country Link
JP (1) JP2013152785A (en)
TW (1) TWI490566B (en)
WO (1) WO2013111472A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09145937A (en) * 1995-11-21 1997-06-06 Sharp Corp Back light device
JP2003066208A (en) * 2001-04-19 2003-03-05 Internatl Business Mach Corp <Ibm> Discrete pattern, optical member using the same, light transmission plate, sidelight device, transmissive liquid crystal display device, and method, program and system for generating the discrete pattern and computer readable recording medium with computer readable program for generating the discrete pattern recorded thereon
JP2010164745A (en) * 2009-01-15 2010-07-29 Oji Paper Co Ltd Luminance uniformizing sheet and planar light source apparatus
JP2010186679A (en) * 2009-02-13 2010-08-26 Oji Paper Co Ltd Planar light source device, and method of manufacturing optical member for the planar light source device
JP2010205417A (en) * 2009-02-27 2010-09-16 Nec Lcd Technologies Ltd Surface light-emitting device
WO2011104765A1 (en) * 2010-02-26 2011-09-01 株式会社クラレ Light-guide plate and method for manufacturing a light-guide plate

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003172667A (en) * 2001-12-05 2003-06-20 Hiroshi Iseda Apparatus for measuring photoconductor luminance pattern
TW200616803A (en) * 2004-10-14 2006-06-01 Mitsubishi Rayon Co Drawing device and drawing method
TWI460237B (en) * 2010-07-05 2014-11-11 Chi Mei Corp A pattern forming ink composition, a light guide plate, a light emitting unit, and a liquid crystal display element having the light emitting unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09145937A (en) * 1995-11-21 1997-06-06 Sharp Corp Back light device
JP2003066208A (en) * 2001-04-19 2003-03-05 Internatl Business Mach Corp <Ibm> Discrete pattern, optical member using the same, light transmission plate, sidelight device, transmissive liquid crystal display device, and method, program and system for generating the discrete pattern and computer readable recording medium with computer readable program for generating the discrete pattern recorded thereon
JP2010164745A (en) * 2009-01-15 2010-07-29 Oji Paper Co Ltd Luminance uniformizing sheet and planar light source apparatus
JP2010186679A (en) * 2009-02-13 2010-08-26 Oji Paper Co Ltd Planar light source device, and method of manufacturing optical member for the planar light source device
JP2010205417A (en) * 2009-02-27 2010-09-16 Nec Lcd Technologies Ltd Surface light-emitting device
WO2011104765A1 (en) * 2010-02-26 2011-09-01 株式会社クラレ Light-guide plate and method for manufacturing a light-guide plate

Also Published As

Publication number Publication date
TW201331648A (en) 2013-08-01
TWI490566B (en) 2015-07-01
JP2013152785A (en) 2013-08-08

Similar Documents

Publication Publication Date Title
CN102765258B (en) Ink jet recording device and image forming method
KR101266314B1 (en) Light guide plate manufacturing method and apparatus
EP2562590B1 (en) Illumination unit and display apparatus using the same
JP5909399B2 (en) Light guide plate creation method and apparatus
WO2013121671A1 (en) Method and device for creating light guide plate for liquid crystal tv
JP6043134B2 (en) Method for adjusting color temperature of surface emitting lighting device
WO2013111472A1 (en) Method and device for creating light guide plate
JP5894052B2 (en) Image forming apparatus and image forming method
JP6043135B2 (en) Light guide plate creation method and apparatus, and light guide plate
JP5462306B2 (en) Light guide plate creation method
JP2014021400A (en) Image display body and preparation device thereof
JP2014022223A (en) Plane light emission device having light-emitting surfaces on both sides, and method for manufacturing light guide plate used in the same
JP2014063581A5 (en) Light guide plate creation method and apparatus, and light guide plate

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12866579

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12866579

Country of ref document: EP

Kind code of ref document: A1