baber/WOPTO huggingface dataset:
Patent JP-2022065182-A (JP)
Title: Laser device and light source device
IPC: H01S3/067
Filed: 2022-02-25
Abstract: PROBLEM TO BE SOLVED: To provide a laser device and a light source device capable of reducing a footprint to save space. 
     SOLUTION: A laser device 10 has: a bottom plate part 24; a plurality of semiconductor laser elements 12 installed onto the bottom plate part; terminal parts 20 and 22 provided upward on the bottom plate part, being electrically connectable with the exterior; and a housing that has the bottom plate part. Each terminal part has a columnar conductor 50 protruded from the housing. The columnar conductor has an insulation part 53. The housing has a top plate part 36 opposed to the bottom plate part. The top plate part is provided with openings 54 and 56 corresponding to the columnar conductors. A conductor part of each columnar conductor and each opening are in contact with each other via the insulation part. A conductor component is in contact with and fixed to the columnar conductor with a screw screwed to the columnar conductor. The columnar conductor is electrically connected with the exterior via the conductor component. The columnar conductor partially protrudes to the outside of the housing via the opening. 
     SELECTED DRAWING: Figure 1B 
     COPYRIGHT: (C)2022,JPO&INPIT
Patent JP-2022066298-A (JP)
Title: Light-emitting device
IPC: H01S5/02255
Filed: 2022-03-01
Abstract: PROBLEM TO BE SOLVED: To provide a light-emitting device which reduces color shading and light emission irregularity while suppressing conversion efficiency of a phosphor part from decreasing. 
     SOLUTION: A light-emitting device according to the present invention comprises a semiconductor laser element 10, a light reflection part 20 provided with a light reflection surface 21, and a phosphor part 30 having a light irradiation surface. A region, irradiated with radiant light, of the light reflection surface 21 has a first region 21a and a second region 21b, which are so provided that on the light irradiation surface of the phosphor part 30, radiant light, reflected on a side close to the second region 21b, of radiant light reflected in the first region 21a and radiant light, reflected on a side far away from the first region 21a, of radiant light reflected in the second region 21b overlap each other and radiant light, reflected on a side far away from the second region 21b, of the radiant light reflected in the first region 21a and radiant light, reflected on a side close to the first region 21a, of the radiant light reflected in the second region 21b overlap each other. 
     SELECTED DRAWING: Figure 5 
     COPYRIGHT: (C)2022,JPO&INPIT
Patent JP-2023127208-A (JP)
Title: vehicle
Inventor: SHIMOGAKI YUSUKE
IPC: H02J7/10
Filed: 2022-03-01
Abstract: To precisely perform power measurement in normal charging/discharging while suppressing an increase of cost in a vehicle corresponding to quick charging and normal charging/discharging.SOLUTION: A vehicle 1 is an electric vehicle corresponding to quick charging and normal charging/discharging. When normal charging/discharging is executed, an ECU 100 of the vehicle 1 sets relays 82 and 83 in a closed state and charges/discharges a battery 11 through power lines PL3 and NL2. The ECU 100 measures charging current or discharging current on the basis of a detection value of a current sensor 85, and measures charging power or discharging power on the basis of the detection value of the current sensor 85 and a detection value of a voltage sensor 77.SELECTED DRAWING: Figure 1
Patent JP-2023131175-A (JP)
Title: Fastening device
Inventor: OWAKI EISAKU
IPC: A63F7/02
Filed: 2022-03-07
Abstract: To provide a fastening device which can easily attach/detach a constitution member of a game machine.SOLUTION: A fastening device 1 comprises: a fastening mechanism body 200 which is provided in one of an inner frame 102 of a game machine 100 and a game machine constitution member 110 constituting the game machine 100 and has a locking member urging spring storage part 2015; and an insertion body 300 which is provided in the other of the inner frame 102 and the game machine constitution member 110 and has a tip part 304 and a recess part 303 to be inserted to the locking member urging spring storage part 2015. The fastening mechanism body 200 comprises: a switching member 203; a guide member 204 which holds the switching member 203 in a slidable manner; a locking member 205 which locks the switching member 203; a switching member urging spring 206 which urges the switching member 203 in the slide direction; and a locking member urging spring 207 which urges the locking member 205.SELECTED DRAWING: Figure 3b
Patent JP-2023131661-A (JP)
Title: Titanium boride dispersion strengthening steel, manufacturing method of titanium boride dispersion strengthening steel, and raw material powder for dispersing titanium boride
Inventor: KIKUCHI TAKAHIKO
IPC: C22C33/02
Filed: 2022-03-09
Abstract: To provide titanium boride dispersed steel due to 3-D molding that is titanium boride dispersion strengthening steel capable of effectively developing the titanium boride dispersion strengthening, a manufacturing method of the titanium boride dispersion strengthened steel, and raw material powder for dispersing the titanium boride.SOLUTION: Titanium boride dispersed steel contains titanium boride particles having an average particle diameter of 3.0 μm or less in terms of projected area circle equivalent diameter, and the titanium boride particles are present as aggregates, and the titanium boride particles are present in aggregates, and the aggregates have a size of 5 μm or more and 20 μm or less, and the aggregates are scattered throughout the steel. A method for manufacturing titanium boride dispersed steel uses a powder bed melt modeling method, in which a mixed powder of composite powder containing titanium boride and iron and steel powder is used as a raw material, and the titanium boride is molded under the conditions of combining a laser output and a scanning speed that become energy density that does not melt the titanium boride.SELECTED DRAWING: Figure 1
Patent JP-2023111797-A (JP)
Title: User equipment, base station, and method for time domain correlation information reporting
Inventor: YOKOMAKURA KAZUNARI
IPC: H04W24/10
Filed: 2022-03-11
Abstract: To provide user equipment (UE), a base station device, and a communication method for time domain correlation information reporting that improves communication flexibility and/or efficiency.SOLUTION: In a communication system, UE includes receiving circuitry configured to receive first information to configure one or more channel state information-reference signals (CSI-RS) for tracking and second information to configure time domain correlation related information from a base station device. The UE also includes transmitting circuitry configured to transmit a channel state information (CSI) report including the time domain correlation related information to the base station device. A first parameter trs-Info is included in the first information. A second parameter reportQuantity is not set to 'none'. The time domain correlation related information is measured by the one or more CSI-RS for tracking.SELECTED DRAWING: Figure 7
Patent JP-2023140365-A (JP)
Title: Man conveyor handrail device and man conveyor
Inventor: TOMINAGA YASUSUKE
IPC: B66B29/00
Filed: 2022-03-15
Abstract: To provide a man conveyor handrail device capable of detecting cracks occurring in a glass panel.SOLUTION: A man conveyor handrail device has a glass panel, a light projector that projects light onto the glass panel so that the light enters the inside of the glass panel, and a light receiver that receives light that comes out from inside the glass panel.SELECTED DRAWING: Figure 3
Patent JP-2023136759-A (JP)
Title: Processing apparatus, processing method, and processing program
Inventor: ONUKI AKITO
IPC: G06Q30/06
Filed: 2022-03-17
Abstract: To enable a user to be given a coupon privilege and points even if the user forgets to carry a paper coupon or a point card when visiting a store.SOLUTION: A server device 10 includes: an identification unit 132 which, in response to receiving an input of an image obtained by capturing a face of a first user, performs face authentication to identify an ID of the first user; a determination unit 133 which refers to user information 122 to acquire an attribute of the first user on the basis of the ID of the first user and determines whether the first user is an object to which a coupon and/or points are to be presented or not; and a presentation unit 134 which, if it is determined that the first user is an object to which a coupon and/or points are to be presented, refers to coupon/point information 123 to present a coupon and/or points given to the first user.SELECTED DRAWING: Figure 3
Patent JP-2023138043-A (JP)
Title: Yarn processing facility
Inventor: NAGAI NORIHIRO
IPC: B65H63/00
Filed: 2022-03-18
Abstract: To easily acquire information of an individual residual amount and/or a total residual amount of yarn contained in a plurality of packages during unwinding that are used in a manufacturing plant, and to alleviate a burden on an operator involved in acquiring an individual residual amount and/or a total residual amount.SOLUTION: An information management section 110 of a yarn processing facility 100 acquires, for a plurality of spindles 9 respectively, individual residual amount content information which takes into consideration an individual residual amount indicating a residual amount of yarn Y contained in packages during unwinding that are unwinding yarn Y at a predetermined yarn supply information reference time or that have unwound yarn at the yarn supply information reference time, as yarn supply packages Ps. In addition to that or instead of that, the information management section 110 acquires total residual amount content information which takes into consideration a total residual amount obtained by totaling the individual residual amounts of the plurality of spindles 9. Further, the information management section 110 outputs the acquired individual residual amount content information and/or the total residual amount content information to a machine stand output section 5b.SELECTED DRAWING: Figure 7
Patent JP-2023138067-A (JP)
Title: connector
Inventor: HOTSUKI MASAKI
IPC: H01R13/6474
Filed: 2022-03-18
Abstract: To provide a connector that is easy to manufacture and suitable for high-speed transmission, and includes a terminal in which the plate thickness direction of a second holding portion is oriented in a direction that intersects a plane perpendicular to the first plate width direction when the plate width direction of a first holding portion is the first plate width direction.SOLUTION: An intermediate portion 33 of a terminal 30 of a connector 100 includes a plate thickness direction conversion portion 33b. The plate thickness direction conversion portion 33b includes a conversion curved portion 33b2 bent in the thickness direction, a first plate surface portion 33b1 formed on the first holding portion 32 side with respect to the conversion curved portion 33b2, and a second plate surface portion 33b3 that is formed on the second held portion 34 side with respect to the conversion curved portion 33b2. The first plate surface portion 33b1 has its thickness direction oriented in a direction parallel to a plane perpendicular to the first plate width direction, and the second plate surface portion 33b3 has its thickness direction oriented to intersect with a plane perpendicular to the first plate width direction.SELECTED DRAWING: Figure 4
Patent JP-2023143427-A (JP)
Title: Light source unit and lighting fixture
Inventor: SAEGUSA HIROKAZU
IPC: F21S8/04
Filed: 2022-03-25
Abstract: To provide a light source unit facilitated in work for being mounted on a fixture body: and to provide a lighting fixture.SOLUTION: A light source unit 2 is detachably mounted on a fixture body 3 and includes a mounting part 4, a light source part 20, a spring member 5 and a temporary holding part 6. The mounting part 4 has a long plate-like primary part 41. The light source part 20 is mounted on a first surface 410a of the primary part 41. The spring member 5 is mounted on a second surface 410b of the primary part 41 and has an arm part 52 capable of being hooked on the fixture body 3. The spring member 5 is disposed to a first end part 411 of the primary part 41. A temporary holding part 6 holds the arm part 52 so that at least a tip end 528 of the arm part 52 is located at a position more apart from the first end part 411 than that when the arm part 52 is hooked on the fixture body 3 in a state that the arm part 52 is not hooked on the fixture body 3.SELECTED DRAWING: Figure 1
Patent JP-2023147399-A (JP)
Title: Control device
Inventor: MORI BUNTA
IPC: B60W20/17
Filed: 2022-03-30
Abstract: To detect generation of abnormal sound or vibration precisely during firing of an internal combustion engine in a gear mechanism which joins a rotary electric machine to the internal combustion engine.SOLUTION: A control device which controls an internal combustion engine and a rotary electric machine which is connected to the internal combustion engine via a gear mechanism, is configured so as to measure time required for an output axis of the internal combustion engine to rotate by unit angle repeatedly during execution of firing which rotates the rotary electric machine while combusting fuel in a gas column of the internal combustion engine and then generating engine torque, and to determine whether or not there is a possibility that tooth beating sound is generated in the gear mechanism on the basis of time sequence of the duration.SELECTED DRAWING: Figure 4
Patent JP-2023147783-A (JP)
Title: Method for measuring bending of rolled material
Inventor: SUZUKI TOMONORI
IPC: B21B38/02
Filed: 2022-03-30
Abstract: To provide a method for measuring bending of a rolled material, which can quantitatively, easily and accurately measure bending of the rolled material in a hot rolling step without lowering productivity and safety of an operator and without causing appearance quality problem of a finally obtained rolled product or foreign object entry.SOLUTION: This method for measuring bending of the rolled material in the hot rolling step measures the bending of the rolled material on the entrance and the exit of a hot rolling mill or by displacement meters arranged on the entrance and the exit and capable of measurement in a strip manner and in non-contact.SELECTED DRAWING: Figure 1
Patent JP-2023151923-A (JP)
Title: Negative electrode active material and manufacturing method thereof
Inventor: HIROSE KIICHI
IPC: H01M4/58
Filed: 2022-04-01
Abstract: To provide a negative electrode active material that can improve initial efficiency and increase battery capacity, achieve sufficient battery cycle characteristics, and increase stability during mass production slurry production, and a manufacturing method that can manufacture such a negative electrode active material.SOLUTION: A negative electrode active material includes negative electrode active material particles, the negative electrode active material particles include silicon compound particles containing Li silicate, an intermediate layer covering the surface of the silicon compound particles, and including a Li compound different from the Li silicate adjacent to a portion of the surface of the silicon compound particle, and/or a metal oxide and/or a metal hydroxide adjacent to at least a portion of the surface of the silicon compound particle, and an outermost carbon layer covering the intermediate layer.SELECTED DRAWING: Figure 1
Patent JP-2022097498-A (JP)
Title: Refractory sheet, and method for producing the same
IPC: C09K21/02
Filed: 2022-04-07
Abstract: PROBLEM TO BE SOLVED: To provide a refractory sheet that has improved fire resistance and flexibility while having improved productivity. 
     SOLUTION: A refractory sheet has a matrix resin, thermally expandable graphite, and an inorganic filler, and contains a plurality of air bubbles inside it. The plurality of air bubbles have an average diameter of 90 μm or more, and an area ratio of the air bubbles in the cross section is 3-25%. 
     SELECTED DRAWING: None 
     COPYRIGHT: (C)2022,JPO&INPIT
Patent JP-2023157289-A (JP)
Title: Push-pull output circuit
Inventor: MIZUOCHI TAKAO
IPC: H03K17/66
Filed: 2022-04-14
Abstract: To provide a push-pull output circuit capable of suppressing increase in the number of components and complication of wiring, and of preventing a transistor from being in saturated with certainty.SOLUTION: A push-pull output circuit 10 comprises: a diode-connected bipolar transistor Q1 that configures a current mirror circuit; a bipolar transistor Q2 whose base terminal is connected with a base terminal of the bipolar transistor Q1; a constant current source Io; a diode D4 whose anode terminal is connected with a collector terminal of the bipolar transistor Q1 and whose cathode terminal is connected with the constant current source; and a lateral bipolar transistor Q3 whose base terminal is commonly connected with the base terminal of the bipolar transistor Q1 and the base terminal of the bipolar transistor Q2, one of whose emitter and collector terminals is connected with the cathode terminal of the diode, and the other of whose emitter and collector terminals is connected with a collector terminal of the bipolar transistor Q2.SELECTED DRAWING: Figure 1
Patent JP-2022090049-A (JP)
Title: Npra agonists, compositions, and uses thereof
IPC: A61P9/00
Filed: 2022-04-22
Abstract: PROBLEM TO BE SOLVED: To provide a natriuretic peptide derivative of a Formula (I), (fatty acyl) z -(B) x -(G) y -NP, and compositions including the natriuretic peptide derivative of the Formula (I). 
     SOLUTION: In a formula: z is 1, x is an integer from 2 to 4, and y is 3; or z is 0, x is an integer from 0 to 4, and y is an integer from 1 to 3; the fatty acyl comprises 12 to 24 (e.g., 12 to 18) carbons atoms; B is lysine or arginine; G is glycine; NP is a natriuretic peptide; if present, (fatty acyl) z - is covalently linked to the N-terminus of (B) x ; (fatty acyl) z -(B) x - is covalently linked to the N-terminus of (G) y ; and (fatty acyl) z -(B) x -(G) y - is covalently linked to the N-terminus of NP. 
     SELECTED DRAWING: None 
     COPYRIGHT: (C)2022,JPO&INPIT
Patent JP-2023160629-A (JP)
Title: 成膜方法及び基板処理装置
IPC: C23C16/04
Filed: 2022-04-22
Abstract: 【課題】自己組織化単分子膜を用いて所望の領域に絶縁膜を選択的に形成する際の選択性を向上する成膜方法及び基板処理装置を提供する。【解決手段】第１領域の表面に形成された金属膜と、第２領域の表面に形成された第１絶縁膜と、を有する基板を準備する工程と、鎖部と、前記鎖部の一端に設けられた第１機能基と、前記鎖部の他端に設けられた第２機能基と、を有する有機化合物を含むガスを前記基板の表面に供給して、前記第１領域に前記有機化合物の自己組織化単分子膜を形成する工程と、前駆体ガス及び反応ガスを前記基板の表面に供給して、前記第２領域に第２絶縁膜を形成する工程と、前記第１領域に形成された前記自己組織化単分子膜を除去する工程と、を有する、成膜方法。【選択図】図４
Patent JP-2023161650-A (JP)
Title: 検査用プローブ、及び、該検査用プローブを有する検査用ソケット
IPC: G01R1/067
Filed: 2022-04-26
Abstract: 【課題】電流路を大きくした検査用プローブ及びこの検査用プローブを有する検査用ソケットを提供する。【解決手段】第一の面と第二の面を有する導電性材料から成る支持体と、支持体の第一の面側に設けた第一の接触部材及び支持体の第二の面側に設けた第二の接触部材を備える。第一の接触部材及び第二の接触部材の少なくとも一方が複数設けられており、複数の第一の接触部材と少なくとも１つの第二の接触部材、又は、複数の第二の接触部材と少なくとも１つの第一の接触部材が、支持体を通じて電気的に接続されている。【選択図】図２
Patent JP-2023162520-A (JP)
Title: 水性インク、インクカートリッジ、及びインクジェット記録方法
IPC: C09D11/322
Filed: 2022-04-27
Abstract: 【課題】加熱及び乾燥機構や反応液を用いずに、耐擦過性が良好な画像を難吸収性記録媒体に記録することが可能な水性インクを提供する。【解決手段】ブリストー法において接触開始から３０ｍｓｅｃ１／２までの水吸収量が３ｍＬ／ｍ２以上１０ｍＬ／ｍ２以下である記録媒体へのインクジェット方式による記録に用いられる水性インクである。この水性インクは、顔料、非プロトン性の含硫黄環状有機溶剤、及び樹脂粒子を含有し、前記樹脂粒子のガラス転移温度が、３０℃以上であることを特徴とする。【選択図】なし
Patent JP-2023162568-A (JP)
Title: リソグラフィー装置、リソグラフィー方法、及び物品の製造方法
IPC: H01L21/027
Filed: 2022-04-27
Abstract: 【課題】 
  重ね合せ精度を向上させることができるリソグラフィー装置を提供する。 
【解決手段】 
  リソグラフィー装置において、基板保持部により保持された基板のショット領域にパターン部を用いてパターンを形成するパターン形成手段と、前記基板保持部に対する前記基板の位置ずれ量と、前記基板を保持するために前記基板の少なくとも一部に加える保持力と、前記基板と前記パターン部との重ね合わせ誤差の関係を予め取得する取得手段と、前記基板保持部に対する前記基板の前記位置ずれ量を測定する測定手段と、前記測定手段によって測定された前記位置ずれ量と、前記取得手段により取得された前記関係とに基づき、前記基板と前記パターン部の重ね合わせ誤差を低減するように前記保持力を制御する制御手段と、を有する。 
【選択図】  図１
Patent JP-2022093614-A (JP)
Title: Method of and apparatus for extending electrode life in laser chamber
IPC: H01S3/038
Filed: 2022-05-02
Abstract: PROBLEM TO BE SOLVED: To extend a useful lifetime of a laser discharge chamber. 
     SOLUTION: Disclosed are methods of and apparatus for extending a useful lifetime of a laser discharge chamber. In the laser discharge chamber, the polarity of an electrode positioned at a fixed position within the chamber is caused to be positive with respect to the polarity of a second electrode defining a discharge gap with the first electrode. The first electrode is made of a material that forms an erosion resistant surface when the first electrode is used and an anode. Also disclosed are an arrangement in which a first electrode is positionable with respect to a second electrode defining a discharge gap with the second electrode, and the position of the first electrode controlled to maintain the width of the gap within a predetermined range. 
     SELECTED DRAWING: Figure 5 
     COPYRIGHT: (C)2022,JPO&INPIT
Patent JP-2023165310-A (JP)
Title: 学習装置、学習方法及び学習プログラム
IPC: G06N20/00
Filed: 2022-05-02
Abstract: 【課題】学習中の学習モデルの中から性能が良い学習モデルを適切に選定することができる学習装置、学習方法及び学習プログラムを提供する。【解決手段】エージェントの学習モデルを学習させるための学習装置１０であって、学習部は、エージェントが所定の環境において付与される報酬が最大となるように学習モデルを学習させる強化学習部と、学習モデルの第１指標値と第２指標値とを算出する評価指標値算出部と、学習ステップ数が所定以上の学習モデルを学習済みモデルとして抽出するモデル抽出部と、を備える。モデル抽出部は、学習済みモデルのうち、第１指標値と第２指標値との各々が所定の条件を満たす学習済みモデルを、評価対象の学習済みモデルとして選定する。【選択図】図２
Patent JP-2022119825-A (JP)
Title: Composition and method for treating pulmonary vascular disease
IPC: A61P9/10
Filed: 2022-05-16
Abstract: PROBLEM TO BE SOLVED: To provide compositions and methods for treating pulmonary vascular disease in a subject. 
     SOLUTION: A method comprises administering to the subject a therapeutically effective amount of a YAP/TAZ inhibiting composition and/or a GLS1 inhibiting composition. 
     SELECTED DRAWING: None 
     COPYRIGHT: (C)2022,JPO&INPIT
Patent JP-2023169009-A (JP)
Title: 車両用ハンドル保持検出装置
IPC: G08G1/16
Filed: 2022-05-16
Abstract: 【課題】画像中の物体認識などの処理に必要な計算量を削減すると共に、運転者によるハンドル保持の有無を検出する精度を上げること。【解決手段】運転者の手と操舵用ハンドルの両方を含む像を車載カメラで撮影する。処理が容易な事前に定めたハンドルモデルを用意しておき、撮影した画像を事前に用意した変換行列を用いて、Ｓ５２でハンドルモデルの座標系に変換する。判定処理部は、撮影した画像におけるハンドルの位置が、ハンドルモデルの座標系において前記ハンドルモデルと重なるか否かをＳ５３で識別する。更に、撮影した画像における手とハンドルの位置変化に対応するハンドルモデル上の回転角度θと、舵角取得部が取得した舵角Φの変化とをＳ５５で比較する。手がハンドルモデルの円周上にあり、かつ回転角度θと舵角Φの変化が一致した場合にハンドル保持を検知する。【選択図】図１０
Patent JP-2023170090-A (JP)
Title: 直流開閉器および接続箱
IPC: H02S40/34
Filed: 2022-05-18
Abstract: 【課題】小型化を図ることができる直流開閉器および接続箱を提供する。【解決手段】直流開閉器２’は、太陽電池モジュールとパワーコンディショナとの間の直流電路を開閉する直流開閉部と、太陽電池モジュールへの逆流を防止する逆流防止部と、を備える。直流開閉部と逆流防止部は一体的に構成されている。【選択図】図２
Patent JP-2023170276-A (JP)
Title: 配線基板
IPC: H05K3/46
Filed: 2022-05-18
Abstract: 【課題】配線基板の品質向上。【解決手段】実施形態の配線基板１００は、導体パッド１１１を含む第１導体層と、第１導体層を覆っていて上面２１ａを有する樹脂絶縁層２１と、上面２１ａに接合されている金属箔１２ａを含む第２導体層１２と、樹脂絶縁層２１及び金属箔１２ａを貫いて導体パッド１１１を露出させる貫通孔３と、貫通孔３を充填すると共に導体パッド１１１と第２導体層１２とを接続するビア導体４と、を含んでいる。導体パッド１１１の表面１１１ａに存在する樹脂が平面視において貫通孔３内の表面１１１ａに対して占める比率は面積比で５％以下であり、貫通孔３の周囲で金属箔１２ａと樹脂絶縁層２１とが剥離している部分の長さＬは、貫通孔３の中心軸から外側へと向かう方向において１０μｍ以下であり、金属箔１２ａにおける樹脂絶縁層２１から剥離している部分と樹脂絶縁層２１との間がビア導体４によって充填されている。【選択図】図２
Patent JP-2022183047-A (JP)
Title: Light diffusion sheet, backlight unit, liquid crystal display device, and information device
Inventor: FUKUDA TADAYOSHI
IPC: G02F1/1335
Filed: 2022-05-19
Abstract: To provide a light diffusion sheet which is highly capable of equalizing brightness.SOLUTION: A first surface 43a of a light diffusion sheet 43 is provided with a plurality of recesses 105, each having a roughly inverted four-sided pyramid shape. A second surface 43b of the light diffusion sheet 43 is provided with a plurality of linear structures 106 extending in a given direction. An apex angle of the plurality of recesses 105 is 100° or greater.SELECTED DRAWING: Figure 3