JP3215902U - Optical film and display device - Google Patents

Optical film and display device Download PDF

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JP3215902U
JP3215902U JP2018000494U JP2018000494U JP3215902U JP 3215902 U JP3215902 U JP 3215902U JP 2018000494 U JP2018000494 U JP 2018000494U JP 2018000494 U JP2018000494 U JP 2018000494U JP 3215902 U JP3215902 U JP 3215902U
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optical film
light
layer
partition
light emitting
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蔚軒 陳
蔚軒 陳
凱鈞 楊
凱鈞 楊
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Radiant Guangzhou Opto Electronics Co Ltd
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Abstract

【課題】コリメーションのよい光源の光学フィルム及びそれを応用した表示装置を提供する。【解決手段】光入射層12と、光出射層14と、光入射層12と光出射層14との間に位置し、複数の通路部16及び複数の仕切部162を有し、通路部161と仕切部162が交互に配列され、通路部161は、光入射層12に対向される第1の端部163及び光出射層14に対向される第2の端部164を有し、仕切部162は、光入射層12に対向される第3の端部165及び光出射層14に対向される第4の端部166を有し、第1の端部163及び第3の端部165が、光入射層12に接触し覆われ、第2の端部164及び第4の端部166が、光出射層14に接触し覆われる中間層16と、を含む光学フィルム10であって、さらに、当該光学フィルム10を使用する表示装置とする。【選択図】図1An optical film of a light source with good collimation and a display device using the same are provided. A light incident layer, a light emitting layer, a light incident layer, and a light emitting layer are provided between the light incident layer and the light emitting layer. And the partition 162 are alternately arranged. The passage 161 has a first end 163 facing the light incident layer 12 and a second end 164 facing the light emitting layer 14. 162 has a third end 165 facing the light incident layer 12 and a fourth end 166 facing the light emitting layer 14, and the first end 163 and the third end 165 are the same. The optical film 10 including the intermediate layer 16 that is in contact with and covered with the light incident layer 12, and the second end portion 164 and the fourth end portion 166 are in contact with and cover the light emitting layer 14, and The display device uses the optical film 10. [Selection] Figure 1

Description

本考案は、光学フィルム及び表示装置に関し、特に、コリメーションのよい光源を提供できる光学フィルム及びそれを応用した表示装置に関する。   The present invention relates to an optical film and a display device, and more particularly to an optical film that can provide a light source with good collimation and a display device using the optical film.

液晶ディスプレイは、携帯電話、PDA、車載用ディスプレイ、ノートブックコンピュータ、液晶モニタ及び液晶テレビ等を含む様々なものに幅広く応用されている。しかしながら、TFT−LCD(薄膜トランジスタ−液晶)ディスプレイは、非自己発光型(non−emission)ディスプレイであるため、画面表示を制御する液晶パネルに加えて、バックライトモジュールを追加して面光源として提供する必要がある。典型的なサイドライト型バックライトモジュールは、導光板を利用して面光源を形成し、主な部材として、光源、導光板、反射シート以外にも、通常、構造的に互いに垂直である二つの集光プリズムシート(prism sheet)と、当該二つの集光プリズムシートの上下両面に設けられて当該二つの集光プリズムシートを挟む二つの拡散シート(Diffuser)と、を備える。当該集光プリズムシートは、通常、BEF(Brightness Enhancement Film)と略称される。当該集光プリズムシートの役割とは、光の出射角度を制限して、ほとんどの光線を正面視角の±22〜25度の範囲から出射させ、残りの光線を反射させて再利用(リサイクル)することにより、集光と輝度向上の効果に達することである。また、当該拡散シートは、光を拡散させて均一にする機能を有するため、明るさ(輝度)の不均一性を低減でき、モアレパターン(Moire pattern)のような光学的欠陥を隠すことができる。   Liquid crystal displays are widely applied to various types of devices including mobile phones, PDAs, in-vehicle displays, notebook computers, liquid crystal monitors, liquid crystal televisions, and the like. However, since a TFT-LCD (thin film transistor-liquid crystal) display is a non-self-emission display, a backlight module is added to provide a surface light source in addition to a liquid crystal panel that controls screen display. There is a need. A typical sidelight-type backlight module uses a light guide plate to form a surface light source, and as a main member, in addition to the light source, the light guide plate, and the reflection sheet, two structurally perpendicular members are usually perpendicular to each other. A condensing prism sheet, and two diffusion sheets (Diffuser) provided on both upper and lower surfaces of the two condensing prism sheets and sandwiching the two condensing prism sheets. The condensing prism sheet is generally abbreviated as BEF (Brightness Enhancement Film). The role of the condensing prism sheet is to limit the light emission angle so that most of the light rays are emitted from the range of ± 22 to 25 degrees of the front viewing angle, and the remaining light rays are reflected and reused (recycled). Thus, the effect of condensing and improving luminance is achieved. In addition, since the diffusion sheet has a function of diffusing light to make it uniform, non-uniformity in brightness (luminance) can be reduced, and optical defects such as moire patterns can be hidden. .

また、従来のマイクロレンズ集光方式を利用して半透過型バックライトの光利用効率を向上させる技術や、従来の染料吸収型カラーフィルターの代わりに、グレーティング回折分光法を利用して光利用効率を向上させる技術、レンチキュラーレンズを使用して両眼の視覚にずれが生じるようにする立体3Dディスプレイ技術のような周知技術は、いずれもコリメーションのよい光出射面型のバックライトを必要とする。しかしながら、従来の液晶ディスプレイでのバックライトモジュールのライトフィールドの半値全幅は約30〜50度であり、コリメーションのよいバックライトを提供することができるコリメーションのよいバックライト技術における構造は、複雑過ぎ且つ工程が難しいので、大量の生産に不利である。   In addition, the technology to improve the light utilization efficiency of the transflective backlight using the conventional microlens focusing method, and the light utilization efficiency using the grating diffraction spectroscopy instead of the conventional dye absorption color filter. Any known technique such as a stereoscopic 3D display technique that uses a lenticular lens to shift the vision of both eyes requires a light-emitting surface type backlight with good collimation. However, the full width at half maximum of the light field of the backlight module in the conventional liquid crystal display is about 30 to 50 degrees, and the structure in the collimating backlight technology that can provide the collimating backlight is too complicated and The process is difficult, which is disadvantageous for mass production.

本考案は、コリメーションのよい光源の光学フィルム及びそれを応用した表示装置を提供することを目的とする。   An object of the present invention is to provide a light source optical film with good collimation and a display device using the same.

本考案に係る光学フィルムは、光入射層と、光出射層と、前記光入射層と前記光出射層との間に位置し、複数の通路部及び複数の仕切部を有し、前記通路部と前記仕切部が交互に配列され、前記通路部は、前記光入射層に対向される第1の端部及び前記光出射層に対向される第2の端部を有し、前記仕切部は、前記光入射層に対向される第3の端部及び前記光出射層に対向される第4の端部を有し、前記第1の端部及び前記第3の端部が、前記光入射層に接触し覆われ、前記第2の端部及び前記第4の端部が、前記光出射層に接触し覆われる中間層と、を含む。   An optical film according to the present invention includes a light incident layer, a light output layer, and a plurality of passage portions and a plurality of partition portions, which are located between the light incident layer and the light output layer, and the passage portion. And the partition portion are alternately arranged, the passage portion has a first end portion facing the light incident layer and a second end portion facing the light emitting layer, and the partition portion is , Having a third end facing the light incident layer and a fourth end facing the light emitting layer, wherein the first end and the third end are the light incident An intermediate layer that is in contact with and covered with the layer, and wherein the second end and the fourth end are in contact with and covered with the light emitting layer.

本考案に係る表示装置は、上記光学フィルムと、光源と、光学プレートと、表示パネルと、を含み、前記光学プレートが前記光源で生じた光線を受けて面状光源に変換させ、前記光学フィルムの前記光入射層が前記光学プレートに対向され、前記光学フィルムの前記光出射層は、前記表示パネルに対向される。   A display device according to the present invention includes the optical film, a light source, an optical plate, and a display panel, wherein the optical plate receives light generated by the light source and converts the light into a planar light source, and the optical film. The light incident layer is opposed to the optical plate, and the light emitting layer of the optical film is opposed to the display panel.

本考案の第1の実施例の光学フィルムを示す断面図である。It is sectional drawing which shows the optical film of the 1st Example of this invention. 本考案の第2の実施例の光学フィルムを示す断面図である。It is sectional drawing which shows the optical film of the 2nd Example of this invention. 本考案の他の実施例の表示装置を示す断面図である。It is sectional drawing which shows the display apparatus of the other Example of this invention.

本考案の上記の目的、特徴、及び利点をさらに明瞭にするために、以下、図面を参照して、好ましい実施例により、詳しく説明する。   In order to further clarify the above-described objects, features and advantages of the present invention, a preferred embodiment will be described in detail below with reference to the drawings.

図1に示すように、本考案の光学フィルム10の第1の実施例は、光入射層12と、光出射層14と、前記光入射層12と前記光出射層14との間に位置する中間層16と、を含む。前記中間層16は、複数の通路部161及び複数の仕切部162を有し、前記通路部161と前記仕切部162は交互に配列され、前記通路部161は、前記光入射層12に対向される第1の端部163及び前記光出射層14に対向される第2の端部164を有し、前記仕切部162は、前記光入射層12に対向される第3の端部165及び前記光出射層14に対向される第4の端部166を有し、前記第1の端部163及び前記第3の端部165は、前記光入射層12に接触し覆われ、前記第2の端部164及び前記第4の端部166は、前記光出射層14に接触し覆われる。   As shown in FIG. 1, the first embodiment of the optical film 10 of the present invention is located between the light incident layer 12, the light emitting layer 14, and the light incident layer 12 and the light emitting layer 14. Intermediate layer 16. The intermediate layer 16 includes a plurality of passage portions 161 and a plurality of partition portions 162, the passage portions 161 and the partition portions 162 are alternately arranged, and the passage portions 161 are opposed to the light incident layer 12. The first end portion 163 and the second end portion 164 facing the light emitting layer 14, and the partition portion 162 includes the third end portion 165 facing the light incident layer 12 and the second end portion 164. The first end portion 163 and the third end portion 165 are in contact with and covered with the light incident layer 12, and have a fourth end portion 166 facing the light emitting layer 14. The end portion 164 and the fourth end portion 166 are in contact with and covered with the light emitting layer 14.

ここで、前記第1の端部163の幅が前記第2の端部164の幅より狭く、前記第3の端部165の幅が前記第4の端部166の幅より広いため、前記通路部161は、前記光入射層12から前記光出射層14に向けてだんだん広くなる形状になり、前記仕切部162は、前記光入射層12から前記光出射層14に向けてだんだん狭くなる形状になる。   Here, since the width of the first end 163 is narrower than the width of the second end 164 and the width of the third end 165 is wider than the width of the fourth end 166, the passage The portion 161 has a shape that gradually widens from the light incident layer 12 toward the light emitting layer 14, and the partition portion 162 has a shape that gradually narrows from the light incident layer 12 toward the light emitting layer 14. Become.

その他、前記光学フィルム10は、さらに、それぞれ前記仕切部162の前記第3の端部165に設けられる複数の反射部材18を含む。よって、光線が前記光入射層12を通過した後、その一部の光線は、前記反射部材18によって反射されて前記仕切部162を通過できず、他の一部の光線は、比較的狭い前記第1の端部163を通過して、前記通路部161の中で伝播され、さらに、比較的広い前記第2の端部164を経由して、最後に前記光出射層14を貫通する。前記第1の端部163が比較的狭いため、角度が比較的よくコリメートされた光線のみを通過させ、角度が比較的発散した光線は、前記第3の端部165上の前記反射部材18によって反射され易いので、ライトフィールドの半値全幅(FWHM,Full Width Half Maximum)を大幅に減少できる。   In addition, the optical film 10 further includes a plurality of reflecting members 18 provided at the third end 165 of the partition 162. Therefore, after a light ray passes through the light incident layer 12, a part of the light ray is reflected by the reflecting member 18 and cannot pass through the partition 162, and the other part of the light ray is relatively narrow. The light passes through the first end portion 163, propagates in the passage portion 161, passes through the relatively wide second end portion 164, and finally penetrates the light emitting layer. Since the first end 163 is relatively narrow, only light rays that are relatively well collimated are allowed to pass through, and light rays that are relatively divergent in angle are reflected by the reflective member 18 on the third end 165. Since it is easily reflected, the full width at half maximum (FWHM, Full Width Half Maximum) of the light field can be greatly reduced.

また、本実施例において、さらに、前記通路部161の屈折率が前記仕切部162の屈折率より大きいことを利用して、前記通路部161が光学的に密な媒質になり、前記仕切部162が光学的に疎な媒質になるようにする。光線が前記通路部161の中で伝播されると、光学的に密な媒質と光学的に疎な媒質との境界で、全反射の効果が生じ易いため、光線が屈折されて前記仕切部162へ入ることを避け、エネルギーの散逸を避けることができる。この状況は、前記仕切部162内に空気があり、前記通路部161がPET或PMMA等のプラチック材料で製造される場合、PET或PMMAからなる前記通路部161が光学的に密な媒質になることに対し、前記仕切部162内の空気が光学的に疎な媒質になることで実現できる。   Further, in the present embodiment, the passage portion 161 becomes an optically dense medium by utilizing the fact that the refractive index of the passage portion 161 is larger than the refractive index of the partition portion 162, and the partition portion 162. To be an optically sparse medium. When the light beam is propagated in the passage portion 161, the effect of total reflection is likely to occur at the boundary between the optically dense medium and the optically sparse medium. Avoiding energy dissipation. In this situation, when there is air in the partition 162 and the passage 161 is made of a plastic material such as PET or PMMA, the passage 161 made of PET or PMMA becomes an optically dense medium. On the other hand, it can be realized by making the air in the partition 162 an optically sparse medium.

図2に示すように、本考案の光学フィルム10の第2の実施例は、第1の実施例に類似し、その相違とは、第2の実施例の前記仕切部162が、前記通路部161に対向される側面167をさらに有し、前記側面167及び前記第3の端部165がいずれも反射機能を有し、前記通路部161内に空気があることである。   As shown in FIG. 2, the second embodiment of the optical film 10 of the present invention is similar to the first embodiment, and the difference is that the partition 162 of the second embodiment has the passage portion. Further, a side surface 167 opposed to 161 is further provided, the side surface 167 and the third end portion 165 both have a reflection function, and air is present in the passage portion 161.

光線が前記光入射層12を通過した後、その一部の光線は、前記第3の端部165によって反射されて前記仕切部162を通過できず、他の一部の光線は、比較的狭い前記第1の端部163を通過し、前記通路部161の中で伝播され、さらに、比較的広い前記第2の端部164を経由して、最後に前記光出射層14を貫通する。前記第1の端部163が比較的狭いため、角度が比較的よくコリメートされた光線のみを通過させ、角度が比較的発散した光線は反射機能を有する前記第3の端部165によって反射され易いので、ライトフィールドの半値全幅(FWHM,Full Width Half Maximum)を大幅に減少できる。   After the light beam has passed through the light incident layer 12, some of the light beam is reflected by the third end 165 and cannot pass through the partition 162, and the other light beam is relatively narrow. The light passes through the first end portion 163, propagates in the passage portion 161, and finally passes through the light emitting layer 14 via the relatively wide second end portion 164. Since the first end 163 is relatively narrow, only light rays that are relatively well collimated are allowed to pass, and light rays that are relatively divergent in angle are likely to be reflected by the third end 165 having a reflective function. Therefore, the full width at half maximum (FWHM, Full Width Half Maximum) of the light field can be greatly reduced.

また、本実施例において、前記仕切部162全体を反射率の高い物質で製造するか、又は表面に反射率の高いコーティングを塗布することによって、前記側面167及び前記第3の端部165がいずれも反射機能を有するようにする。光線は前記通路部161で伝播されると、前記側面167で、その反射機能によって前記側面167に反射されるため、光線が屈折されて前記仕切部162へ入ることを避け、エネルギーの散逸を避けることができる。このとき、本実施例は、光学的に密な媒質と光学的に疎な媒質との境界での全反射の原理を利用するのではなく、単に前記仕切部162自身の高い反射率の物質又は高い反射率のコーティングで実現されるものである。従って、本実施例は、前記通路部161内に空気を有する形態を採用でき、これと第1の実施例との相違とは、前記仕切部162内に空気を有し、前記通路部161がPET又はPMMA等のプラチック材料からなることである。   In the present embodiment, the side wall 167 and the third end 165 are either manufactured by manufacturing the entire partition 162 with a highly reflective material or by applying a highly reflective coating on the surface. Also have a reflective function. When the light beam is propagated through the passage portion 161, it is reflected by the side surface 167 by the reflection function at the side surface 167, so that the light beam is refracted and enters the partition portion 162, thereby avoiding energy dissipation. be able to. At this time, the present embodiment does not use the principle of total reflection at the boundary between the optically dense medium and the optically sparse medium, but simply uses a high-reflectance material of the partition 162 itself or It is realized with a coating with high reflectivity. Therefore, the present embodiment can adopt a form having air in the passage portion 161. The difference between this embodiment and the first embodiment is that the partition portion 162 has air, and the passage portion 161 has It consists of a plastic material such as PET or PMMA.

図3に示すように、本考案の他の実施例の表示装置は、光学フィルム10と、光源20と、光学プレート30と、表示パネル40と、を備え、ここで、前記光学プレート30は、前記光源20で生じる光線を受けて面状光源に変換させ、前記光学フィルム10の前記光入射層12は、前記光学プレート30に対向され、前記光学フィルム10の前記光出射層14は、前記表示パネル40に対向される。本実施例において、前記光学プレート30は、導光板の形態であって、サイドライト型バックライトモジュールに応用され、その他、直下型バックライトモジュールに応用される場合、前記光学プレート30は、拡散板の形態である。   As shown in FIG. 3, a display device according to another embodiment of the present invention includes an optical film 10, a light source 20, an optical plate 30, and a display panel 40, where the optical plate 30 is The light generated by the light source 20 is received and converted into a planar light source, the light incident layer 12 of the optical film 10 is opposed to the optical plate 30, and the light emitting layer 14 of the optical film 10 is the display. It faces the panel 40. In this embodiment, the optical plate 30 is in the form of a light guide plate and is applied to a sidelight type backlight module. In addition, when applied to a direct type backlight module, the optical plate 30 is a diffusion plate. It is a form.

上記のように、本考案は、コリメーションの良い光源の光学フィルム10及びそれが応用される表示装置を提供し、前記第1の端部163が比較的狭いため、角度が比較的よくコリメートされた光線のみが通過され、角度が比較的発散した光線は前記第3の端部165上の前記反射部材18又は反射機能を有する前記第3の端部165によって反射されて前記仕切部162へ入れないことを利用し、これによって、ライトフィールドの半値全幅(FWHM、Full Width Half Maximum)を大幅に減少できる。   As described above, the present invention provides an optical film 10 of a light source with good collimation and a display device to which the optical film 10 is applied. Since the first end 163 is relatively narrow, the angle is relatively well collimated. Only the light beam passes and the light beam having a relatively divergent angle is reflected by the reflecting member 18 on the third end portion 165 or the third end portion 165 having a reflecting function and does not enter the partitioning portion 162. This makes it possible to significantly reduce the full width at half maximum (FWHM) of the light field.

本考案において、既に実施例を利用して上記のように開示したが、上記の実施例は、本考案を限定するものではない。当業者は、本考案の要旨と範囲を超えない範囲内で、様々な変更と修飾を行うことができる。よって、本考案の保護範囲は、実用新案登録請求の範囲により限定されたものを基準とする。   Although the present invention has already been disclosed in the above using an embodiment, the above embodiment is not intended to limit the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is based on what is limited by the scope of the utility model registration request.

10 光学フィルム、
12 光入射層、
14 光出射層、
16 中間層、
161 通路部、
162 仕切部、
163 第1の端部、
164 第2の端部、
165 第3の端部、
166 第4の端部、
167 側面、
18 反射部材、
20 光源、
30 光学プレート、
40 表示パネル。
10 Optical film,
12 light incident layer,
14 light emitting layer,
16 middle class,
161 passage,
162 partition,
163 first end,
164 second end,
165 third end,
166 fourth end,
167 side,
18 reflective member,
20 light source,
30 optical plate,
40 Display panel.

Claims (9)

光学フィルムであって、
光入射層と、
光出射層と、
前記光入射層と前記光出射層との間に位置し、複数の通路部及び複数の仕切部を有し、前記通路部と前記仕切部が交互に配列され、前記通路部は、前記光入射層に対向される第1の端部及び前記光出射層に対向される第2の端部を有し、前記仕切部は、前記光入射層に対向される第3の端部及び前記光出射層に対向される第4の端部を有し、前記第1の端部及び前記第3の端部が、前記光入射層に接触し覆われ、前記第2の端部及び前記第4の端部が、前記光出射層に接触し覆われる中間層と、
を含むことを特徴とする、光学フィルム。
An optical film,
A light incident layer;
A light emitting layer;
Located between the light incident layer and the light emitting layer, and having a plurality of passage portions and a plurality of partition portions, the passage portions and the partition portions are alternately arranged, and the passage portion is formed by the light incidence layer. A first end opposed to the layer and a second end opposed to the light emitting layer, and the partition includes a third end opposed to the light incident layer and the light emitting A fourth end facing the layer, wherein the first end and the third end are in contact with and covered with the light incident layer, and the second end and the fourth end An intermediate layer whose end is in contact with and covered with the light emitting layer;
An optical film comprising:
前記第1の端部の幅が前記第2の端部の幅より狭い、
ことを特徴とする、請求項1に記載の光学フィルム。
The width of the first end is narrower than the width of the second end;
The optical film according to claim 1, wherein:
前記第3の端部の幅が前記第4の端部の幅より広い、
ことを特徴とする、請求項1又は2に記載の光学フィルム。
The width of the third end is wider than the width of the fourth end;
The optical film according to claim 1, wherein the optical film is characterized in that
それぞれ前記仕切部の前記第3の端部に設けられる複数の反射部材をさらに含む、
ことを特徴とする、請求項1乃至3のいずれか一項に記載の光学フィルム。
Each further including a plurality of reflecting members provided at the third end of the partition,
The optical film according to any one of claims 1 to 3, wherein the optical film is characterized in that
前記通路部の屈折率が前記仕切部の屈折率より大きい、
ことを特徴とする、請求項1乃至4のいずれか一項に記載の光学フィルム。
A refractive index of the passage portion is larger than a refractive index of the partition portion,
The optical film according to any one of claims 1 to 4, wherein the optical film is characterized in that
前記仕切部内に空気を有する、
ことを特徴とする、請求項1乃至5のいずれか一項に記載の光学フィルム。
Having air in the partition,
The optical film according to any one of claims 1 to 5, wherein the optical film is characterized in that
前記仕切部は、前記通路部に対向される側面をさらに含み、
前記側面及び前記第3の端部はいずれも反射機能を有する、
ことを特徴とする、請求項1乃至3のいずれか一項に記載の光学フィルム。
The partition part further includes a side surface facing the passage part,
Both the side surface and the third end portion have a reflecting function,
The optical film according to any one of claims 1 to 3, wherein the optical film is characterized in that
前記通路部内に空気を有する、
ことを特徴とする、請求項1乃至3、7のいずれか一項に記載の光学フィルム。
Having air in the passage section,
The optical film according to claim 1, wherein the optical film is characterized in that
表示装置であって、
請求項1乃至8のいずれか一項に記載の光学フィルムと、
光源と、
光学プレートと、
表示パネルと、を含み、
前記光学プレートは、前記光源で生じた光線を受けて面状光源に変換させ、前記光学フィルムの前記光入射層が前記光学プレートに対向され、前記光学フィルムの前記光出射層が前記表示パネルに対向されている、
ことを特徴とする、表示装置。
A display device,
The optical film according to any one of claims 1 to 8,
A light source;
An optical plate;
A display panel,
The optical plate receives light generated by the light source and converts it into a planar light source, the light incident layer of the optical film is opposed to the optical plate, and the light emitting layer of the optical film is applied to the display panel. Faced,
A display device characterized by that.
JP2018000494U 2017-05-24 2018-02-11 Optical film and display device Expired - Fee Related JP3215902U (en)

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