TW201804185A - Display device and refrigerator having the same capable of increasing the light use efficiency - Google Patents

Display device and refrigerator having the same capable of increasing the light use efficiency Download PDF

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Publication number
TW201804185A
TW201804185A TW106124157A TW106124157A TW201804185A TW 201804185 A TW201804185 A TW 201804185A TW 106124157 A TW106124157 A TW 106124157A TW 106124157 A TW106124157 A TW 106124157A TW 201804185 A TW201804185 A TW 201804185A
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Taiwan
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light
guide plate
light guide
display device
display
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TW106124157A
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Chinese (zh)
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TWI632405B (en
Inventor
池田光晴
山崎康位
菊地芳輝
松本尚大
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日立空調 家用電器股份有限公司
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F23/00—Advertising on or in specific articles, e.g. ashtrays, letter-boxes
    • G09F23/0058—Advertising on or in specific articles, e.g. ashtrays, letter-boxes on electrical household appliances, e.g. on a dishwasher, a washing machine or a refrigerator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/028—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/36—Visual displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs
    • G09F2013/1804—Achieving homogeneous illumination
    • G09F2013/1831—Achieving homogeneous illumination using more than one light source

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

The invention relates to a display device capable of increasing the light use efficiency and a refrigerator having the display device. The display device includes a display panel, a light guide plate disposed behind the display panel, a light emitting means configured to emit light into the light guide plate, and a substrate disposed behind the display panel and provided with a detection part configured to detect a change of capacitance. The light guide plate includes light extraction parts configured to irradiate light that is light-guided in the light guide plate. The number of the light extraction parts disposed at the side of the display panel is larger than the number of the light extraction parts disposed at the side of the substrate.

Description

顯示裝置及具備其之冰箱 Display device and refrigerator provided with the same

本發明，係有關顯示裝置及具備其之冰箱。 The present invention relates to a display device and a refrigerator including the same.

在冰箱、微波爐等的家電產品、便攜機器等上採用利用導光板下的顯示裝置的情況漸增。導光板，係如下之板：一面將從丙烯酸、聚苯乙烯等的透明板之側面所入射的光，以依司乃耳的定律下的全反射予以導光，一面在形成於表面的光取出部將一部分的光予以散射，予以發光。此外，顯示裝置，係構成為：在導光板的表面側，配置文字、記號印刷或遮光的膜，將此文字等以來自光源的光進行照射。如此之利用導光板下的顯示裝置的先前技術方面，存在例如專利文獻1。 Increasingly, display devices using a light guide plate are used in home appliances such as refrigerators, microwave ovens, and portable devices. A light guide plate is a plate that guides light incident from the side of a transparent plate such as acrylic, polystyrene, etc., to total light under the law of Esnael to guide the light, while taking out the light formed on the surface The part scatters part of the light and emits light. In addition, the display device is configured such that a character, a mark print, or a light-shielding film is arranged on the surface side of the light guide plate, and the character or the like is irradiated with light from a light source. As such a prior art aspect of using a display device under a light guide plate, for example, there is Patent Document 1.

在專利文獻1，係具備冰箱主體的貯藏室、將貯藏室的前方開口進行開閉的貯藏室門、貯藏室門的前表面的透光性的門前表面板、門前表面板的背面的基板、基板與門前表面板之間的顯示構材、將顯示構材朝門前表面進行照射的照明手段、在顯示構材的後方就電容的變化進行檢測的檢測部、顯示構材與檢測部之間的導光板、就檢 測部及照明手段進行控制的控制部，將照明手段及檢測部構成於基板上，檢測部係採用互容式。 Patent Document 1 relates to a storage room including a refrigerator main body, a storage room door that opens and closes a front opening of the storage room, a light-transmitting door front surface plate on a front surface of the storage room door, a substrate on a back surface of the door front surface plate, and a substrate. The display structure between the door and the front panel, the illumination means for illuminating the display structure toward the front surface of the door, the detection unit that detects the change in capacitance behind the display structure, and the guidance Light board, inspection The control unit that controls the measurement unit and the illumination means is configured on the substrate by the illumination means and the detection unit, and the detection unit adopts a mutual capacitance type.

[先前技術文獻] [Prior technical literature] [專利文獻] [Patent Literature]

[專利文獻1]日本專利特開2015-55361號公報 [Patent Document 1] Japanese Patent Laid-Open No. 2015-55361

然而，在記載於專利文獻1之技術，係導光板整體發光，配置於導光板上的膜之中，不僅與文字等對應的顯示部(透光部)，而是多量的光照射於無文字等的遮光部(非透光部)，被遮光部所吸收，故存在光的利用效率低的如此的課題。此外，存在以下課題：導光板的變形、晃動等，使得觸控面板的感度降低，或在接觸部光朝基板側漏光。 However, in the technology described in Patent Document 1, the entire light guide plate emits light, and the film disposed on the light guide plate is not only a display portion (light transmitting portion) corresponding to characters, but a large amount of light is irradiated to the non-text characters. Such a light-shielding portion (non-light-transmitting portion) is absorbed by the light-shielding portion, so that there is such a problem that the utilization efficiency of light is low. In addition, there are problems such as deformation and shaking of the light guide plate, which reduces the sensitivity of the touch panel, or light leaks toward the substrate side at the contact portion.

所以，本發明之目的，係在於提供一種顯示裝置或具備此顯示裝置的冰箱，在該顯示裝置係一面保持觸控面板的感度，一面提高光的利用效率。 Therefore, an object of the present invention is to provide a display device or a refrigerator provided with the display device, in which the display device maintains the sensitivity of the touch panel and improves the light utilization efficiency.

一種顯示裝置，具備：顯示板、位於前述顯示板的背後的導光板、使光入射於前述導光板內的發光手 段、在前述顯示板的後方搭載就電容的變化進行檢測的檢測部的基板，前述導光板，係具有將在前述導光板內進行導光的光予以放出的光取出部，前述光取出部，係前述導光板的前述顯示板側比前述導光板的前述基板側形成較多個。 A display device includes a display panel, a light guide plate located behind the display panel, and a light emitting hand that makes light enter the light guide plate. A substrate provided with a detection unit that detects a change in capacitance is mounted behind the display panel. The light guide plate includes a light extraction portion that emits light guided by the light guide plate, and the light extraction portion. The display panel side of the light guide plate is formed more than the substrate side of the light guide plate.

依本發明時，可提供一種顯示裝置或具備此顯示裝置的冰箱，在該顯示裝置係一面保持觸控面板的感度，一面提高光的利用效率。 According to the present invention, a display device or a refrigerator provided with the display device can be provided. The display device can maintain the sensitivity of the touch panel while improving the light utilization efficiency.

1‧‧‧冰箱主體 1‧‧‧ refrigerator main body

2a‧‧‧左冷藏室門 2a‧‧‧Left refrigerator door

2b‧‧‧右冷藏室門 2b‧‧‧Right refrigerator door

2d‧‧‧冷藏室 2d‧‧‧Freezer

3‧‧‧上鉸鏈 3‧‧‧Upper hinge

3a‧‧‧左鉸鏈 3a‧‧‧left hinge

3a、3b‧‧‧右鉸鏈 3a, 3b‧‧‧Right hinge

3b、4a‧‧‧製冰室門 3b, 4a‧‧‧ Ice door

4b‧‧‧冷凍室門 4b‧‧‧Freezer door

4b、4c‧‧‧急速冷凍室門 4b, 4c‧‧‧‧Freezer door

4d1‧‧‧冷凍室 4d1‧‧‧Freezer

4d2‧‧‧急速冷凍室 4d2‧‧‧Quick Freezer

4d3‧‧‧製冰室 4d3‧‧‧‧Ice-making Chamber

5‧‧‧蔬菜室門 5‧‧‧Vegetable room door

5d‧‧‧蔬菜室 5d‧‧‧Vegetable Room

6‧‧‧門前表面板(玻璃板) 6‧‧‧Door front panel (glass panel)

9‧‧‧操作顯示區域 9‧‧‧ Operation display area

9a‧‧‧顯示用觸控部 9a‧‧‧ Display touch unit

10‧‧‧顯示區域 10‧‧‧ display area

11‧‧‧LED 11‧‧‧LED

12‧‧‧光取出部 12‧‧‧light extraction section

13‧‧‧導光板 13‧‧‧light guide

14‧‧‧顯示部(透光部) 14‧‧‧Display section (light transmitting section)

15‧‧‧非透光部 15‧‧‧Non-light transmitting section

16‧‧‧顯示板(膜) 16‧‧‧display board (film)

17‧‧‧基板 17‧‧‧ substrate

18‧‧‧觸控感測器 18‧‧‧ touch sensor

[圖1]本發明的實施例相關的冰箱的正面圖。 [FIG. 1] A front view of a refrigerator according to an embodiment of the present invention.

[圖2]就示於圖1的P部的顯示區域及操作顯示區域的顯示狀態進行繪示的圖。 [Fig. 2] Fig. 2 is a diagram illustrating display states of a display area and an operation display area of the P portion shown in Fig. 1.

[圖3]從本實施例相關的顯示裝置將膜除去的狀態的正面圖。 3 is a front view of a state where a film is removed from a display device according to the present embodiment.

[圖4]圖2中的操作顯示區域之處的剖面圖。 [FIG. 4] A cross-sectional view of an operation display area in FIG. 2. [FIG.

[圖5]繪示就歷來的顯示部的照度分布進行計算後的結果的圖。 FIG. 5 is a diagram showing a result obtained by calculating an illuminance distribution of a conventional display unit.

[圖6]繪示就應用本實施例下的顯示部的照度分布進行計算後的結果的圖。 FIG. 6 is a diagram showing a result obtained by calculating an illuminance distribution of a display unit according to this embodiment.

以下，參照圖式而詳細說明本發明之實施形態。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

此處係以將依本發明下的顯示裝置內建於貯藏室門的冰箱為例進行說明。 The following description is based on a refrigerator in which a display device according to the present invention is built in a storage room door.

圖1，係本實施例相關的冰箱的正面圖，為顯示部及操作部處於非顯示狀態的圖。冰箱主體1，係從上依序具有冷藏室2d、冷凍室4d1、蔬菜室5d等。在冷藏室2d與冷凍室4d1之間，係設置急速冷凍室4d2，在急速冷凍室4d2的隔壁設置製冰室4d3。 FIG. 1 is a front view of a refrigerator according to this embodiment, and is a view in which a display portion and an operation portion are in a non-display state. The refrigerator main body 1 includes a refrigerator compartment 2d, a freezer compartment 4d1, a vegetable compartment 5d, and the like in this order from the top. Between the refrigerating compartment 2d and the freezing compartment 4d1, a rapid freezing compartment 4d2 is provided, and an ice-making compartment 4d3 is provided next to the rapid freezing compartment 4d2.

此外，在各貯藏室的前方開口，係設置將前述前方開口進行開閉的門。亦即，在冷藏室2d的前方開口，係設置左冷藏室門2a及右冷藏室門2b，在冷凍室4d1、急速冷凍室4d2、製冰室4d3及蔬菜室5d的個別的前方開口，係分別設置冷凍室門4b、急速冷凍室門4c、製冰室門4a及蔬菜室門5。 Moreover, the front opening of each storage room is provided with the door which opens and closes the said front opening. That is, the front opening of the refrigerating compartment 2d is provided with a left refrigerating compartment door 2a and a right refrigerating compartment door 2b, and the freezer compartment 4d1, the quick freezing compartment 4d2, the ice-making compartment 4d3, and the vegetable compartment 5d are individually opened in front. A freezing compartment door 4b, a quick freezing compartment door 4c, an ice-making compartment door 4a, and a vegetable compartment door 5 are respectively provided.

左冷藏室門2a及右冷藏室門2b，係分別透過設於冰箱主體1之上部的上鉸鏈3(左鉸鏈3a、右鉸鏈3b)等，而被軸撐為旋轉自如。亦即，構成被構成為左右對開式的所謂的法式門。 The left refrigerator compartment door 2a and the right refrigerator compartment door 2b are pivoted freely through the upper hinge 3 (left hinge 3a, right hinge 3b) and the like provided on the upper part of the refrigerator main body 1, respectively. That is, the structure is a so-called French door which is configured as a left-right type.

此外，冷凍室門4b、急速冷凍室門4c、製冰室門4a及蔬菜室門5，分別係抽出式的門，與個別的貯藏室的容器一起抽出自如。 In addition, the freezing compartment door 4b, the quick freezing compartment door 4c, the ice-making compartment door 4a, and the vegetable compartment door 5 are draw-out doors, respectively, and can be freely drawn out together with the container of the individual storage compartment.

並且，左冷藏室門2a及右冷藏室門2b、冷凍 室門4b、急速冷凍室門4c、製冰室門4a以及蔬菜室門5，係在其外表面設置具有透明度的門前表面板(玻璃板)6。 The left refrigerator compartment door 2a and the right refrigerator compartment door 2b The door 4b, the quick freezing compartment door 4c, the ice-making compartment door 4a, and the vegetable compartment door 5 are provided on their outer surfaces with a door front surface plate (glass plate) 6 having transparency.

接著，兼作為操作區域與顯示區域的操作顯示區域9，係使用者從外部進行操作，從而設定冷藏室2d及冷凍室4d1等的各貯藏室的室溫，或將冷藏室2d、冷凍室4d1等急速冷卻，或設定製冰裝置的運轉開啟/關閉、急速製冰等。亦即，使用者就操作顯示區域9進行操作，使得可進行冰箱的諸功能的設定。 Next, the operation display area 9 serving as both the operation area and the display area is operated by the user from outside to set the room temperature of each of the storage compartments such as the refrigerating compartment 2d and the freezing compartment 4d1, or the refrigerating compartment 2d and the freezing compartment 4d1. Wait for rapid cooling, or set the operation of the ice making device on / off, rapid ice making, etc. That is, the user operates the operation display area 9 so that the functions of the refrigerator can be set.

此外，顯示區域10，係就從操作顯示區域9的輸入結果進行顯示者。可透過此顯示區域10，從而確認使用者在操作顯示區域9所進行的操作，或確認預先設定的諸功能的狀態。 In addition, the display area 10 displays a result of the input from the operation display area 9. Through this display area 10, the operation performed by the user in operating the display area 9 can be confirmed, or the status of various functions set in advance can be confirmed.

再者，就供於使操作顯示區域9及顯示區域10亮燈用的顯示用觸控部9a進行操作，使得操作顯示區域9及顯示區域10係從圖1的熄燈狀態，轉移至圖2的亮燈狀態。亦即，使用者進行按下、觸碰、將手指靠近顯示用觸控部9a(作為一例「MENU」的文字顯示標記)等的操作，使得常時可視認的顯示用觸控部9a以外的操作顯示區域9及顯示區域10的文字、記號等，從熄燈狀態切換為亮燈狀態，顯示於玻璃板6上，可進行操作顯示區域9的操作。藉此，通常時、常時可視認的文字、圖形的顯示係僅顯示用觸控部9a，操作顯示區域9及顯示區域10的非點燈時係可作成簡易的外觀，設計感提升。此 外，僅需要操作顯示區域9及顯示區域10時予以亮燈，故可獲得節能效果。 Furthermore, the display touch section 9a for turning on the operation display area 9 and the display area 10 is operated, so that the operation display area 9 and the display area 10 are switched from the light-off state of FIG. 1 to the state of FIG. 2. Lighting status. That is, the user performs operations such as pressing, touching, and bringing his or her finger close to the display touch portion 9a (as an example of a “MENU” text display mark), so that operations other than the display touch portion 9a that is always recognizable are performed. The characters, symbols, and the like in the display area 9 and the display area 10 are switched from the light-off state to the light-on state, and are displayed on the glass plate 6 to operate the display area 9. Thereby, the display of characters and graphics that are usually recognizable at all times is only the display touch portion 9a, and the non-lighting operation of the display area 9 and the display area 10 can make a simple appearance and improve the design sense. this In addition, the display area 9 and the display area 10 only need to be turned on when the display area 10 is operated, so energy saving effects can be obtained.

另外，就顯示觸控部9a進行操作時，操作顯示區域9及顯示區域10的全部的文字、圖形等被亮燈顯示。該一定時間經過後，顯示區域10係僅顯示當下設定的諸功能的設定狀態的顯示會亮燈，其以外的顯示係熄燈。再者，無操作狀態經過一定時間時，操作顯示區域9及顯示區域10的文字、圖形等係全部熄燈，僅顯示用觸控部9a成為可視認。如此，就始終可視認的顯示用觸控部9a進行操作後，暫時使全部的文字等亮燈，使得使用者係可進行冰箱的功能的確認及可確認可進行何種設定變更。 In addition, when the display touch unit 9a is operated, all characters, graphics, and the like in the operation display area 9 and the display area 10 are illuminated and displayed. After the certain period of time has elapsed, the display area 10 is turned on only for the display of the setting status of the functions currently set, and other displays are turned off. In addition, when a certain period of time has passed in the non-operation state, all characters, graphics, and the like in the operation display area 9 and the display area 10 are turned off, and only the display touch portion 9a becomes visible. In this way, after the display touch unit 9a that is always visible is operated, all the characters and the like are temporarily turned on, so that the user can confirm the functions of the refrigerator and confirm what settings can be changed.

此外，玻璃板6的背面，係塗佈有色塗料。藉此，處理為不會從正面側看見發泡隔熱材，且操作顯示區域9及顯示區域10係透過顯示用觸控部9a的操作而明確地視認，故可實現外觀性優異的門。 The back surface of the glass plate 6 is coated with a colored paint. Thereby, the processing is performed so that the foamed heat insulation material is not seen from the front side, and the operation display area 9 and the display area 10 are clearly recognized by the operation of the display touch portion 9a, so that a door having excellent appearance can be realized.

圖3係從顯示裝置除去膜的狀態下的正面圖，圖4係圖2中的操作顯示區域9之處的剖面圖。與此操作顯示區域9對應的顯示裝置，係具備：具有顯示部(透光部)14及非透光部15的顯示板(膜)16、位於此顯示板16的背後的導光板13、作為使可見光入射至此導光板13內的發光手段的LED11、設置控制電路的基板17。此外，導光板13，係具有將在此導光板13內導光的光予以放出的光取出部12。 FIG. 3 is a front view in a state where the film is removed from the display device, and FIG. 4 is a cross-sectional view at a place where the display area 9 is operated in FIG. 2. The display device corresponding to this operation display area 9 includes a display panel (film) 16 having a display portion (light transmitting portion) 14 and a non-light transmitting portion 15, a light guide plate 13 located behind the display plate 16, and The LED 11 that emits visible light into the light-emitting means in the light guide plate 13 and the substrate 17 on which the control circuit is provided. The light guide plate 13 includes a light extraction portion 12 that emits light guided in the light guide plate 13.

於此，顯示部14係以具有透射性的文字、記號等而構成者，非透光部15係成膜於顯示部14的周邊者。此外，對於配置於以丙烯酸材而形成的導光板13的左右之側方的LED11施加電壓，使得從LED11出射的光從導光板13之側面而入射，反覆全反射從而在導光板13內部導光。並且，光到達於形成在導光板13的表面的光取出部12時，光從該處放出。此外，將LED11與導光板13，並非基板17的前後方向，而是並置於基板17的左右方向，使得可將顯示裝置整體薄型化，可增加填充於此顯示裝置的背側的發泡隔熱材的厚度，可確保隔熱性能。 Here, the display portion 14 is constituted by characters or symbols having translucency, and the non-light-transmitting portion 15 is formed on the periphery of the display portion 14. In addition, a voltage is applied to the LEDs 11 arranged on the left and right sides of the light guide plate 13 formed of an acrylic material, so that the light emitted from the LED 11 enters from the side of the light guide plate 13 and is totally reflected to repeatedly guide the light inside the light guide plate 13. . When the light reaches the light extraction portion 12 formed on the surface of the light guide plate 13, the light is emitted therefrom. In addition, placing the LED 11 and the light guide plate 13 not in the front-back direction of the substrate 17 but in the left-right direction of the substrate 17 makes it possible to reduce the overall thickness of the display device, and to increase the foam insulation of the back side of the display device. Material thickness to ensure thermal insulation performance.

此光取出部12，係如示於圖4般在顯示部14的背後或其附近，設置為比其他區域(非透光部15)多，使得抑制照射於非透光部15、被非透光部15所吸收的光，可將在導光板13內導光的光有效率地照射於顯示部14，可提升文字、記號等的視認性。 The light extraction portion 12 is provided behind or near the display portion 14 as shown in FIG. 4, and is provided more than other regions (non-transmissive portion 15), so that the non-transmissive portion 15 is suppressed from being irradiated and non-transmissive. The light absorbed by the light portion 15 can efficiently irradiate the light guided in the light guide plate 13 to the display portion 14, and can improve the visibility of characters, symbols, and the like.

此外，圖4的光取出部12，係比起導光板13背面(基板側)，設置多個於導光板13前表面(顯示板側)較有效。此係原因在於可抑制從導光板13背面的光取出部12所放出的光被基板17吸收、在基板17反射於各種的方向的光被顯示板16的非透光部15所吸收等。 In addition, it is more effective to provide a plurality of light extraction portions 12 in FIG. 4 than to the rear surface (substrate side) of the light guide plate 13 on the front surface (display plate side) of the light guide plate 13. This is because the light emitted from the light extraction portion 12 on the back of the light guide plate 13 can be suppressed from being absorbed by the substrate 17, and the light reflected by the substrate 17 in various directions can be absorbed by the non-light-transmitting portion 15 of the display plate 16.

再者，在左右方向形成為長的導光板13之中，在中央側的光取出部12的密度，係成為比在左右兩端側的光取出部12的密度高。此處之中央，係距離最遠離左右兩側的LED11的導光板13上的線。為此，即使在 遠離LED11而光難以到達的中央附近，仍可放出充分的光量的光，可適當調整左右方向的亮度的不均。 Further, among the light guide plates 13 formed to be long in the left-right direction, the density of the light extraction portion 12 on the center side is higher than the density of the light extraction portions 12 on the left and right end sides. The center here is the line on the light guide plate 13 farthest from the left and right LEDs 11. For this reason, even in In the vicinity of the center far from the LED 11 where light is difficult to reach, a sufficient amount of light can still be emitted, and unevenness in brightness in the left and right directions can be appropriately adjusted.

此外，圖4的光取出部12，係導光板13的前表面、背面皆設為凸狀，惟未必為限定於凸狀者，亦可為凹狀。其中，導光板13的背面側的光取出部12，係凸狀多於凹狀較有效。此外，導光板13的背面中央的凸狀的光取出區域12b的高度，係比周邊的光取出區域的高度高較為有效。再者，凸狀的光取出部12，係比起多角柱優選上為六角錐等的多角錐、圓錐等。原因在於：導光板13的背面的凸狀的光取出部12在導光板13之中央附近與基板17點接觸，使得可一面抑止導光板13的變形、晃動所致的觸控感測器18的感度降低，一面抑制朝基板17側的漏光。 In addition, the light extraction portion 12 in FIG. 4 has a convex shape on the front surface and the rear surface of the light guide plate 13, but it is not necessarily limited to a convex shape, and may be a concave shape. Among them, the light extraction portion 12 on the back side of the light guide plate 13 is more effective in terms of convex shape than concave shape. The height of the convex light extraction region 12b in the center of the back surface of the light guide plate 13 is more effective than the height of the peripheral light extraction region. The convex light extraction portion 12 is preferably a polygonal pyramid, a cone, or the like having a hexagonal pyramid or the like, rather than a polygonal pillar. The reason is that the convex light extraction portion 12 on the back of the light guide plate 13 is in point contact with the substrate 17 near the center of the light guide plate 13, so that the touch sensor 18 caused by the deformation and shaking of the light guide plate 13 can be suppressed on one side. The sensitivity is reduced, and light leakage to the substrate 17 side is suppressed.

此外，背面側的光取出部12，係優選上形成於導光板13之中央至LED11的2/3的範圍內。更優選上，光取出區域12形成於導光板13之中央至LED11的1/2的範圍內為有效。原因在於：導光板13的背面的凸狀的光取出部12形成於導光板13之中央附近，使得可一面抑止導光板13的變形、晃動所致的觸控感測器18的感度降低，一面抑制朝基板17側的漏光。 The light extraction portion 12 on the back side is preferably formed in the range from the center of the light guide plate 13 to 2/3 of the LED 11. More preferably, it is effective that the light extraction region 12 is formed in a range from the center of the light guide plate 13 to 1/2 of the LED 11. The reason is that the convex light extraction portion 12 on the back of the light guide plate 13 is formed near the center of the light guide plate 13 so that the sensitivity of the touch sensor 18 caused by the deformation and shaking of the light guide plate 13 can be suppressed while reducing the sensitivity. Light leakage to the substrate 17 is suppressed.

此外，基板17側且左右中央的2個光取出部12，係分別進一步中央側的光取出區域12b的密度及高度中的任一方或雙方，形成為比其兩旁的光取出區域12a高為有效。原因在於：藉此，顯示部之中央的光取出效率提 升，文字的識認性改善。 In addition, the two light extraction portions 12 on the substrate 17 side and the left and right centers are each further formed by one or both of the density and height of the light extraction region 12b on the center side, and are formed to be higher than the light extraction regions 12a on both sides thereof. . The reason is that by this, the light extraction efficiency in the center of the display section is improved The text's legibility improves.

此外，此光取出部12，係可為雷射加工、金屬模成型、噴砂法等可進行凹凸加工的其他製造方法。另外，圖4的光取出部12，係亦可印刷含有可見光的散射材的樹脂。在導光板13內透過全反射而導光的光到達於此散射材時，光被散射而可效率佳地照射於文字、記號等。 In addition, the light extraction portion 12 may be another manufacturing method capable of performing concave-convex processing such as laser processing, metal mold forming, and sandblasting. In addition, the light extraction portion 12 in FIG. 4 can also be printed with a resin containing a scattering material for visible light. When the light guided through the total reflection in the light guide plate 13 reaches the scattering material, the light is scattered and can be efficiently irradiated to characters, signs, and the like.

並且，導光板13之側面，係呈平坦狀。藉此，從LED11所入射之光，係在導光板13的端面被全反射，可抑制漏光，同時將在導光板13內導光的光有效率地照射於顯示部14，文字等的視認性提升。另外，此導光板側面(端面)，係將丙烯酸板切割加工為期望的形狀後，作為最後研磨實施鏡面研磨而形成，惟只要側面為透明即可，可特別限定製造法。 The side surface of the light guide plate 13 is flat. Thereby, the light incident from the LED 11 is totally reflected on the end surface of the light guide plate 13 to prevent light leakage, and at the same time, the light guided by the light guide plate 13 is efficiently irradiated to the display portion 14 and the visibility of characters and the like Promotion. In addition, the side surface (end surface) of the light guide plate is formed by cutting an acrylic plate into a desired shape, and performing mirror polishing as a final polishing. The manufacturing method may be particularly limited as long as the side surface is transparent.

此外，在導光板13的背面側的基板17表面係印刷絹色的油墨。藉此，雖朝基板側放出的光的多數在基板被反射後，在顯示板的光取出部被放出，故可效率佳地將光照射於顯示部14，文字等的視認性提升。 The surface of the substrate 17 on the back side of the light guide plate 13 is printed with a silk-colored ink. With this, although most of the light emitted toward the substrate is reflected on the substrate and then emitted in the light extraction portion of the display panel, the light can be efficiently irradiated to the display portion 14 to improve visibility of characters and the like.

圖5係就歷來構造的導光板的顯示部14的照度分布進行繪示者，圖6係就應用本實施例的設置光取出部12的導光板13的情況下的顯示部14的照度分布進行繪示者。計算法方面，係採用光學模擬。亦即，在模擬設定LED製造商所製作的LED的光學特性、光取出部與導光板的構造、材料特性，就從該LED所入射的光的軌 跡，以歷來構造與本實施例的構造的導光板進行計算，就朝顯示面側所放出的光的分布進行評價。 FIG. 5 shows the illuminance distribution of the display portion 14 of the light guide plate having a conventional structure, and FIG. 6 shows the illuminance distribution of the display portion 14 when the light guide plate 13 of the light extraction portion 12 is applied in this embodiment. Painter. For the calculation method, optical simulation is used. That is, the optical characteristics of the LED manufactured by the LED manufacturer, the structure of the light extraction portion and the light guide plate, and the material characteristics are set in simulation, and the orbit of the light incident from the LED is simulated. The trace is calculated using a light guide plate having a conventional structure and the structure of this embodiment, and the distribution of light emitted toward the display surface side is evaluated.

結果，在本實施例係比起歷來構造，導光板13的兩側的亮度係無太大變化；另一方面，導光板13中央的亮度提升，改善亮度不均。以下，說明此理由。推定為原因在於：在歷來構造，最暗係導光板13之中央附近，而在本實施例，係在導光板13的基板側的左右中央附近使光取出部12的個數比其他區域多，故朝基板側放出之光的多數在基板17被反射，之後光在顯示板16側的光取出部12被放出。此外，推定為原因在於：基板17側且左右中央的2個光取出部12，係分別進一步將中央側的光取出區域12b的密度及高度形成為比其兩旁的光取出區域12a高，故顯示板16側之中央的光取出部12的效率提升。 As a result, in this embodiment, the brightness of the two sides of the light guide plate 13 does not change much compared with the conventional structure; on the other hand, the brightness of the center of the light guide plate 13 is improved to improve uneven brightness. The reason will be described below. It is estimated that the reason is that in the conventional structure, the darkest system is near the center of the light guide plate 13, and in this embodiment, the number of the light extraction portions 12 is increased near the left and right centers of the substrate side of the light guide plate 13 than in other areas. Therefore, most of the light emitted toward the substrate side is reflected on the substrate 17, and then the light is emitted on the light extraction portion 12 on the display panel 16 side. In addition, it is estimated that the reason is that the two light extraction portions 12 on the substrate 17 side and the left and right centers have the density and height of the light extraction area 12b on the center side higher than the light extraction areas 12a on both sides, so the display is displayed. The efficiency of the light extraction portion 12 at the center of the plate 16 is improved.

此外，於透過本實施例而製作的顯示部，亦可一面使各顯示部的亮度均勻化，一面抑止導光板的變形、晃動等所致的觸控面板感度的降低。 In addition, in the display section manufactured through this embodiment, the brightness of each display section can be made uniform while suppressing the reduction of the sensitivity of the touch panel caused by the deformation and shaking of the light guide plate.

根據以上，依本實施例時，證實可提供一種顯示裝置，可一面保持觸控面板的感度，一面提高光的利用效率，提升中央的顯示部14的亮度。 Based on the above, according to this embodiment, it is confirmed that a display device can be provided, which can maintain the sensitivity of the touch panel, improve the light utilization efficiency, and increase the brightness of the central display portion 14.

另外，本發明，係未限定於將顯示裝置內建於貯藏室門的冰箱者，對於空氣清淨機、洗濯機、IH烹飪加熱器等帶有顯示裝置的其他家電、工業產品等亦有效。此外，光源係不僅LED，而可為冷陰極螢光管、有機 EL、無機EL、螢光體、其他發光體。此外，導光板方面，係採用丙烯酸樹脂、聚碳酸酯、聚苯乙烯等相對於可見光下透射率高者為有效。 In addition, the present invention is not limited to a refrigerator having a display device built into a storage room door, and is also effective for other household appliances and industrial products with a display device such as an air cleaner, a washing machine, and an IH cooking heater. In addition, the light source is not only LED, but also cold cathode fluorescent tube, organic EL, inorganic EL, phosphors, other illuminants. In addition, in the light guide plate, it is effective to use acrylic resin, polycarbonate, polystyrene, etc., which have high transmittance to visible light.

11‧‧‧LED 11‧‧‧LED

12‧‧‧光取出部 12‧‧‧light extraction section

12a、12b‧‧‧光取出區域 12a, 12b‧‧‧‧light extraction area

13‧‧‧導光板 13‧‧‧light guide

14‧‧‧顯示部(透光部) 14‧‧‧Display section (light transmitting section)

15‧‧‧非透光部 15‧‧‧Non-light transmitting section

16‧‧‧顯示板(膜) 16‧‧‧display board (film)

17‧‧‧基板 17‧‧‧ substrate

18‧‧‧觸控感測器 18‧‧‧ touch sensor

Claims (8)

一種顯示裝置，具備：顯示板、位於前述顯示板的背後的導光板、使光入射於前述導光板內的發光手段、在前述顯示板的後方搭載就電容的變化進行檢測的檢測部的基板，前述導光板，係具有將在前述導光板內進行導光的光予以放出的光取出部，前述光取出部，係前述導光板的前述顯示板側比前述導光板的前述基板側形成較多個。 A display device includes a display panel, a light guide plate located behind the display panel, a light-emitting means for causing light to enter the light guide plate, and a substrate having a detection unit for detecting a change in capacitance provided behind the display panel, The light guide plate has a light extraction portion that emits light that guides light in the light guide plate, and the light extraction portion is formed on the display plate side of the light guide plate more than the substrate side of the light guide plate. . 如申請專利範圍第1項的顯示裝置，其中，前述發光手段，係位於前述導光板之側方，中央側的前述光取出部的密度，係比兩端側的前述光取出部的密度高。 For example, the display device according to the first patent application range, wherein the light emitting means is located at a side of the light guide plate and a density of the light extraction portion at a center side is higher than a density of the light extraction portion at both end sides. 如申請專利範圍第1或2項的顯示裝置，其中，前述基板側的前述光取出部係凸狀，中央的高度係比周邊的高度高。 For example, the display device according to claim 1 or 2, wherein the light extraction portion on the substrate side is convex, and the height in the center is higher than the height in the periphery. 如申請專利範圍第1或2項的顯示裝置，其中，在前述導光板的基板側，係在前述導光板之中央至前述發光手段的2/3的範圍內，形成凸狀的前述光取出部。 For example, the display device according to item 1 or 2 of the patent application scope, wherein the light extraction portion having a convex shape is formed on the substrate side of the light guide plate in a range from the center of the light guide plate to 2/3 of the light emitting means. . 如申請專利範圍第3或4項的顯示裝置，其中，前述凸狀的光取出部，係該中央側的光取出區域的密度及高度中的任一方或雙方，形成為高。 For example, the display device according to claim 3 or 4, wherein the convex light extraction portion is formed to have one or both of a density and a height of the light extraction region on the central side. 如申請專利範圍第1至5項中任一項的顯示裝置，其中， 前述顯示板，係具有透光部及非透光部，前述光取出部，係比起前述非透光部的背後，形成較多於前述透光部的背後。 For example, the display device according to any one of claims 1 to 5, wherein: The display panel has a light-transmitting portion and a non-light-transmitting portion, and the light extraction portion is formed more than the back of the light-transmitting portion than the back of the non-light-transmitting portion. 如申請專利範圍第1至6項中任一項的顯示裝置，其中，前述導光板，係側面為平坦狀。 For example, the display device according to any one of claims 1 to 6, wherein the light guide plate has a flat side surface. 一種冰箱，具備將貯藏室的前方開口進行開閉的貯藏室門、前述貯藏室門內的隔熱材，其中，具有如申請專利範圍第1至7項中任一項的顯示裝置。 A refrigerator includes a storage room door that opens and closes a front opening of the storage room, and a heat insulating material in the storage room door, and further includes a display device as set forth in any one of claims 1 to 7.
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