CN1855332A - Light-negative button assembly - Google Patents

Light-negative button assembly Download PDF

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Publication number
CN1855332A
CN1855332A CN 200510067491 CN200510067491A CN1855332A CN 1855332 A CN1855332 A CN 1855332A CN 200510067491 CN200510067491 CN 200510067491 CN 200510067491 A CN200510067491 A CN 200510067491A CN 1855332 A CN1855332 A CN 1855332A
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China
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light
key
light emitting
element
emitting element
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CN 200510067491
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Chinese (zh)
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傅文麒
张代立
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中强光电股份有限公司
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Priority to CN 200510067491 priority Critical patent/CN1855332A/en
Publication of CN1855332A publication Critical patent/CN1855332A/en

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Abstract

The invention comprises: a keystroke, an opacity component, at least one luminous component located at the back of the keystroke, and a light guiding component around the keystroke for use in guiding the light from the luminous component throughout the keystroke. The invention can even the light on the keystroke and reduce the amount of the luminous components.

Description

背光型按键总成 Backlit button assembly

【技术领域】本发明涉及一种具有背光的按键,特别是涉及一种背光型按键总成。 TECHNICAL FIELD The present invention relates to a key having a backlight, particularly, to a backlit button assembly.

【背景技术】随着科技的进步,电子产品的应用越来越广泛,在一些光线不足的场所,例如会议中、汽车和飞机上,在使用如电脑、PDA、投影机、手机等电子产品时,常常因为环境中光线的不足而造成按键操作上的不便与困难。 BACKGROUND As technology advances, more and more widespread application of electronic products, in some poorly lit places, such as a meeting, cars and airplanes, such as when using a computer, PDA, projectors, mobile phones and other electronic products , often because of insufficient light environment inconvenience and difficulties caused by a key operation.

为了解决上述问题,中国台湾新型第M248011号专利揭露了一种可发光的按键开关,其是于按键本体采用透光式设计,且按键本体的至少任一侧边处向外延伸设有导柱,而电路板正对应于按键本体的位置处则设有发光元件,电路板再对应于导柱的位置设有相接触的微动开关,当按压开关按键时,导柱会一同按压微动开关而形成开启状态,使发光元件发亮,而光线直接投射在按键本体上,使按键发亮。 To solve the above problem, Chinese New Taiwan Patent No. M248011 discloses a key switch capable of emitting light, which is transparent to light in the design of key bodies, and the key body extending outwardly of at least one of the side edges is provided with a guide column position, the positive and the circuit board corresponding to the key position of the body is provided with a light emitting element, corresponding to the circuit board and then the guide post is provided in contact with the micro switch, when the switch key is pressed, the guide post will be pressed together micro switch open state is formed, the light emitting element lit, and the light is projected directly on the key body in the button is lit.

但按键采用透光材料的设计会造成光线直射使用者的眼睛,造成使用者不适,因此,请参阅图1所示,是另一习知背光型按键的设计,其中按键10采不透光的设计,在按键10的周围则设置了一种透光的导光元件11,再将发光元件12设置于导光元件11的正下方,利用导光元件11的导光性,而在按键10的周围呈现出一圈明亮的背光;但是这种将发光元件12设置于导光元件11正下方的设计,只是将发亮的物件由传统的透光按键移转至围绕在按键10的周围的导光元件11,仍然会造成导光元件11的透光面出现亮点,以及亮度分布不均匀的情形,而为了减少光线分布不均匀的现象,则必须在按键10的周围平均地配置多个发光元件12,借助较多数量的发光元件12来达到亮度均匀的效果,但随着发光元件12的增多,所需的成本以及电力的消耗也随之增多。 However, the key design using a light-transmitting material may cause direct light eyes of the user, causing discomfort to the user, so please refer to FIG. 1, another conventional design of a backlit keys, wherein the keys 10 mining opaque design, the key 10 is provided around the light guide from a light transmissive element 11, then the light emitting element 12 disposed directly below the light guide element 11 by the light guide element 11 of the light guide, and in the key 10 exhibit bright circle around a backlight; but such a light emitting element 12 disposed directly below the light guide member 11 is designed just to transfer the object illuminated by the conventional translucent keys surrounding the key to the guide 10 an optical element 11, still cause transmission surface of the light guide member 11 highlights, as well as the case of the uneven luminance distribution appears, whereas in order to reduce the phenomenon of uneven distribution of light, must be evenly disposed around the plurality of light emitting elements 10 of the key 12, with a greater number of the light emitting element 12 to achieve a uniform brightness effect, but the more the light emitting element 12, the required costs and also increase the power consumption.

【发明内容】本发明的一目的,是提供一种背光型按键总成,藉以达到光线均匀化,并且可避免局部亮点的出现及光线直射使用者。 SUMMARY OF THE INVENTION an object of the present invention is to provide a backlit button assembly, so as to achieve uniform light and direct light can be avoided and a local user highlights.

本发明的另一目的,是提供一种背光型按键总成,可以减少背光型按键的发光元件的数量。 Another object of the present invention is to provide a backlit button assembly, the light emitting element can reduce the number of backlit keys.

为实现上述目的,本发明的一种背光型按键总成,其特征在于:其包括:一按键,为一不透光元件;至少一发光元件,是设于该按键的背面;以及一导光元件,是围绕于该按键周围,用以将该发光元件发出的光线朝向该按键的前方引导透出。 To achieve the above object, a backlight assembly according to the present invention, the push-buttons, characterized by: comprising: a key as an opaque element; and a light guide; at least one light emitting element, is provided on the rear surface of the button element, around the periphery of the button in, for guiding the light rays revealed emitting element toward the front of the button.

本发明的又一种背光型按键总成,其特征在于:其包括:一按键;一导光元件,是围绕于该按键周围,该导光元件具有至少一弯折处、一入光端面及一出光端面,且该弯折处是设于该入光端面与该出光端面间;以及至少一发光元件,是设于该导光元件的入光端面前。 Yet another backlit button assembly of the present invention is characterized in that: it comprises: a key; a light guide member, around the periphery of the button in the light guiding element having at least one bend, and a light incident surface a light incident face, and the bending portion is disposed on the light incident surface of the light between the end surface; and at least one light-emitting element, is provided in the front end of the light into the light guiding element.

本发明的背光型按键总成,是将按键采不透光的设计,再于按键的周围设置一导光元件,而发光元件则是配置于按键的背面,而发光元件所发出的光线则是透过直射或是反射的路径被投射至围绕在按键周围的导光元件,借助导光元件的导光能力而将光线朝向按键的前方引导透出,因此,可使光线均匀地分布于导光元件以达到光线均匀化的目的,并且避免局部亮点的出现,且只需要在按键的背面设置少数的发光元件,藉此可以降低发光元件的使用量以节省成本。 Backlit button assembly according to the present invention, is a key taken opaque design, then the key is provided around a light guide member, the light emitting element is disposed on the back surface of the key it is, and the light emitted from the light emitting element is is projected through the direct or reflected paths of the light guide member surrounding keys, by means of the light guide and the light guide element capacity directing light toward the front of key revealed, and therefore, the light can be uniformly distributed in the light guide the light element to achieve the purpose of homogenization and avoid localized bright spots, and requires only a small number of light emitting elements provided on the back surface of the key, whereby the amount of the light emitting element can be reduced to save cost.

【附图说明】图1为习知背光型按键的剖视图。 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional button-type backlight.

图2为本发明背光型按键配置于电路板上的构造图。 FIG configuration backlit keys arranged on the circuit board 2 of the present invention FIG.

图3为图4在AA位置的剖视图。 3 is a cross-sectional view in FIG. 4 AA position.

图4为本发明第一实施例背光型按键的发光元件配置示意图。 FIG 4 is a backlight-type light-emitting element a first embodiment of a schematic configuration of keys invention.

图5为本发明第一实施例背光型按键的发光元件另一配置示意图。 A light emitting element 5 to the first embodiment of a backlit button configuration diagram of another embodiment of the present invention.

图6为本发明第二实施例背光型按键的剖视图。 Cross-sectional view of a second embodiment of a backlit button in FIG. 6 of the present invention.

图7为本发明第三实施例背光型按键的剖视图。 Sectional view of a third embodiment of a backlit button in FIG. 7 of the present invention.

有关本发明的详细技术特征及其较佳实施例,现在就配合图式说明如下。 Detailed technical features of the present invention and its preferred embodiments will now be described with the following drawings.

【具体实施方式】请参阅图2,其中揭露了本发明的背光型按键总成30应用于一电子产品的电路板20的情形。 DETAILED DESCRIPTION OF THE INVENTION Referring to FIG. 2, which discloses a backlit button assembly of the present invention is applied to a case 30 of the electronic circuit board 20.

请参阅图3所示,本发明第一实施例的背光型按键总成30是包括一按键31、一导光元件40、以及至少一发光元件50;其中按键31为不透光元件,配置在一切换开关(switch)32的上方,按键31的底端通常具有一突出部311,用以抵压并且触动切换开关32的压掣端321,按键31常态时通常被一些具有弹性的支撑元件如弹簧(图中未示)或是直接由切换开关32的压掣端321所支撑;导光元件40为透光元件,且其是围绕在按键31的周围,并且与按键31的轮廓形状配合但是不会影响按键31的运动,而本实施例中,导光元件40是一种环形的元件,并且站立或是固定在电路板20的表面,导光元件40为一种具导光性的元件,其可采用聚碳酸酯(polycarbonate;PC)或是压克力(acrylic,丙烯酸树酯)等透光的材料所制成,而其中聚碳酸酯的透光效果又较压克力为高;而发光元件50是安装在电路板20上,特 Please refer to FIG. 3, a backlit button assembly 30 of the first embodiment of the present invention comprises a key 31, a light guide member 40, and at least one light-emitting element 50; wherein the key element 31 is opaque, disposed a switch (switch) 32 above the bottom end of the button 31 is generally as having some support generally has an elastic member when a projection 311 to press against and touches the switching voltage terminal of the switch 32 of the detent 321, the normal key 31 a spring (not shown) or directly by the switching terminal of the switch 32 pressed detent 321 supported; element 40 is a light-transmissive light guide member, and which is surrounding the button 31, but with the contour and shape of the key 31 does not affect the movement of the key 31, while the present embodiment, the light guide member 40 is an annular member, and stand or fixed to the surface of the light guide element 40 of the circuit board 20 is one kind of element having a light guide property which can be a polycarbonate (polycarbonate; PC) or acrylic (acrylic, acrylic resin) or the like made of light-transmissive material, and wherein the light effect and the acrylic and polycarbonate is high; the light emitting element 50 is mounted on the circuit board 20, Laid 是在不透光的按键31的背面,并且被导光元件40所围绕,发光元件50可为不具方向性的发光二极管(LED)为最佳,由于发光元件50所射出的光线不具方向性,所以部分光线会直接地照射至导光元件40,而另一部分光线则会被不透光的按键31反射后再回来然后进入导光元件40,借助导光元件40的导光能力而将光线朝向按键31的前方引导透出,因此,可使光线均匀地分布于导光元件40以达到光线均匀化的目的,还可以避免局部亮点的出现。 Opposite side of the key 31 is opaque, the light guide member 40 and is surrounded by the light emitting element 50 may be a light emitting diode (LED) as the best non-directional, because the light emitted from the light emitting element 50 does not have directionality, Therefore, some of the light is directly irradiated to the light guide member 40, while another portion of the light 31 reflected key will be opaque then come back into the light guide member 40, by means of the light guide member 40 the ability of the light guide towards the light while 31 front guide key revealed, and therefore, the light can be uniformly distributed in the light guide member 40 in order to achieve uniform lighting purposes, but also can avoid localized bright spots. 而发光元件50的配置是以按键31的中心点为中心的对称位置处设置较佳,例如:可于按键31的中心点的上方或下方各设置一个(如图4所示),或者可于按键31的中心点之四周各设置一个(如图5所示),发光元件50的配置数目可依背光型按键其背光光源亮度的需求增减。 The light emitting element 50 is disposed at symmetrical positions based on the center point of the center key 31 is preferably disposed, for example: may be disposed above or below the respective center points of a key 31 (FIG. 4), or may be in four weeks the center point of each key 31 is provided a (shown in FIG. 5), the number of the light emitting element 50 according to their needs a backlight light source luminance decrease backlit keys.

前述的切换开关32是设置于按键31的下方,而切换开关32的实施例有多种,例如一种传统的切换开关是由一键帽、一弹性元件以及一薄膜电路所构成,弹性元件连接于键帽的下方,另弹性元件具有一突出部,且与薄膜电路之间形成一个空间,薄膜电路又分为第一导电部和第二导电部,中间亦有一空间使其于平常状态下不接触,借助按压键帽时,弹性元件的突出部则接触下方的薄膜电路而使得第一导电部和第二导电部接触,电路因而接通;另已公告的中国台湾第I223295号专利揭露了一种可节省空间及成本的按键开关,其是将第一导电部设置于弹性元件上,而第二导电部则位于薄膜电路上,借助按压键帽时,第一导电部和第二导电部就会接触而通电。 The changeover switch 32 is disposed below the button 31, the switch 32 is switched to the embodiment has a variety of, for example, a conventional switch is constituted by a keycap, a circuit film and a resilient member, the resilient member is connected below the keycap, the elastic element further having a projecting portion, and a space is formed between the film and the circuit, the circuit is divided into a first conductive film portion and a second conductive portion, also an intermediate space in the normal state is not allowed contact means when the key top is pressed, the protruding portion of the elastic member is in contact with the bottom of the thin-film circuit so that the first conductive portion and the second conductive contacts, thereby turning on the circuit; China Taiwan Patent No. I223295 discloses another announcement has a kinds of saving space and cost of the key switch, which is a first conductive portion disposed on the elastic member, and the second portion of the conductive film located on the circuit, when the key top is pressed down, the first conductive portion and the second conductive portion on come into contact with energized. 而以上所揭露者仅为有关切换开关的补充说明,并非本发明的技术特征,举凡熟习此一技艺的人士皆可了解并且灵活运用。 The above descriptions are only the supplementary explanation about the switch, not the features of the invention that whenever a person skilled in this art understand and utilize the Jieke.

第一导电部和第二导电部请参阅图6所示,是揭露本发明第二实施例的背光型按键总成,其是采用了一种具有方向性的发光元件50a,并配合导光元件的形状以及发光元件50a的配置位置的改变,来达到前述的目的。 The first conductive portion and the second conductive portion, please refer to FIG. 6, disclosed is a second embodiment of the present invention backlit button assembly, which is the use of a directional light emitting element 50a, the light guide element and with the shape and arrangement positions of the light emitting element 50a is changed, to achieve the foregoing object. 本实施例中,导光元件40a为一截面具有至少一转折41的L型透光结构,L型透光结构的两端分别为入光端面42及出光端面43,出光端面43位于按键31周围,入光端面42是邻近电路板20设置并垂直于电路板20表面,而发光元件50a是设于入光端面42前,且发光元件50a的光线射出方向(图中箭头B所指的方向)是与电路板20的表面平行,以使发光元件50a射出的光线直接由入光端面42入射于导光元件40a内,而导光元件40a的转折41处具有一反射面,用以将来自于入光端面42的光线反射而朝向出光端面43(即按键31的前方)引导透出;借助具有转折的导光元件40a设置,使由发光元件50a射出的光线可透过转折41处弯折光线后再透出,故发光元件50a不会直射使用者,且透过导光元件40a的传递可使发光元件50a发出的光更均匀地透出。 In this embodiment, the light guide element 40a has a L-shaped light-transmissive structures of at least the transition 41 is a cross-section, both ends of the L structure are translucent light incident surface 42 and the light exit end face 43, the key 43 is located around the light incident surface 31 , the light incident surface 42 is disposed adjacent the circuit board 20 and perpendicular to the surface of the circuit board 20, the light emitting element 50a is provided on the light incident surface 42 and the front, and the light emitting element 50a of the light emitting direction (the direction of arrow B) parallel to the surface of the circuit board 20, so that the light emitted from the light emitting element 50a is directly incident on the light incident surface 40a of the light guide member 42 is, while turning the light guide element 40a is at 41 having a reflective surface for coming from the the light incident surface 42 of the light reflected toward the light exit end face 43 (i.e., forward button 31) revealed the guide; means the light guide element 40a is provided with a turning point, so that the light emitted from the light emitting element 50a can be bent through a light turning point 41 then revealed, so that the light emitting element 50a does not direct the user, the light emitting element 50a and the emitted light can pass through the light guide element 40a is revealed more uniformly.

请参阅图7所示,是揭露本发明第三实施例的背光型按键总成,本实施例与第二实施例不同之处在于,导光元件40b具有两个转折41a、41b,且转折41a、41b处形成有反射面,发光元件50a是直立于电路板20的表面,并位于入光端面42a下方,发光元件50a向上发出的光线,由入光端面42a进入导光元件40b,经转折41a及41b处进行两次反射后将光束弯折往出光端面43a射出,藉以提供按键31所需的均匀光线。 Please refer to FIG. 7, is to expose the backlit button assembly of the third embodiment of the present invention, the present embodiment differs from the second embodiment in that the light guide element 40b has two turn 41a, 41b, 41a and turning , at 41b is formed with a reflecting surface, the light emitting element 50a is standing on the surface of the circuit board 20, and positioned into the light light incident surface 42a downward, the light emitting element 50a emitted upward from the light incident surface into the light guide element 40b 42a, through the transition 41a 41b and the beam will be reflected twice bent Wangchu light emitting end face 43a, so as to provide the desired uniform light button 31.

综上所述,本发明是将按键采不透光的设计,再于按键的周围设置一导光元件,而发光元件是配置于由按键外部无法直视发光元件的位置,例如:按键的背面或设于导光元件的出光端面的侧边,以避免使用者直视发光元件及避免造成光点集中或是不均匀的现象,而发光元件所发出的光线再透过直射或是反射的路径被投射至围绕在按键周围的导光元件,借助导光元件的导光能力而将光线均匀化并朝向按键的前方引导透出,因此,可使光线均匀地分布于导光元件以达到光线均匀化的目的,并且避免局部亮点的出现。 In summary, the present invention is a key taken opaque design, then the key is provided around a light guide member, the light emitting element is disposed at a position by the external keys can not look directly at the light emitting element, for example: the back button or the light guide member provided on an end surface side of the light, to avoid the user to avoid direct-view light emitting element and the light spot focused or non-uniform phenomenon, the light emitted from the light emitting element and then through the direct or reflected paths is projected to the light guide member surrounding keys, by means of the light guide and the ability of the light guide member and the light guide homogenized revealed toward the front of the key, therefore, it can be uniformly distributed in the light of the light guide member in order to achieve uniform light of the object, and avoid localized bright spots.

本发明虽以较佳实施例说明如上,然其并非用以限定本发明的保护范围,任何熟习此技术人员,在不脱离本发明的范围内所作变化,仍应属本发明的保护范围。 Although the preferred embodiments of the present invention described above, they are not intended to limit the scope of the present invention, any skilled in this art, variations made without departing from the scope of the invention, should remain with the scope of the present invention.

Claims (16)

1.一种背光型按键总成,其特征在于:其包括:一按键,为一不透光元件;至少一发光元件,是设于该按键的背面;以及一导光元件,是围绕于该按键周围,用以将该发光元件发出的光线朝向该按键的前方引导透出。 A backlit button assembly, characterized by: comprising: a key, as an opaque member; at least one light emitting element, is provided on the back surface of the key; and a light guide member, around to the around the button for the light emitting element toward the front of the guide key revealed.
2.如权利要求1所述的背光型按键总成,其特征在于:该发光元件为发光二极管。 2. The backlit button assembly as claimed in claim 1, wherein: the light emitting element is a light emitting diode.
3.如权利要求2所述的背光型按键总成,其特征在于:该发光二极管为一不具方向性的发光二极管。 Backlit button assembly as recited in claim 2, wherein: the light emitting diode is a non-directional light emitting diode.
4.如权利要求1所述的背光型按键总成,其特征在于:该发光元件是以该按键的中心点为中心的对称位置设置。 The backlight assembly of said push-buttons to claim 1, wherein: the light emitting elements are arranged symmetrically to the center point of the key.
5.如权利要求1所述的背光型按键总成,其特征在于:该导光元件形状与该按键的轮廓形状相配合。 The backlight assembly of said push-buttons to claim 1, wherein: the shape of the light guide element cooperate with the contour shape of the button.
6.如权利要求1所述的背光型按键总成,其特征在于:该导光元件为聚碳酸酯材料。 Backlit buttons 6. The assembly according to claim 1, wherein: the light guide member is a polycarbonate material.
7.如权利要求1所述的背光型按键总成,其特征在于:该导光元件为压克力材料。 The backlight assembly of said push-buttons to claim 1, wherein: the light guide element is of acrylic material.
8.如权利要求1所述的背光型按键总成,其特征在于:该导光元件具有至少一转折处。 Backlit buttons 8. The assembly according to claim 1, wherein: the light guide member having at least a turning point.
9.如权利要求8所述的背光型按键总成,其特征在于:该转折处设有设有一反射面,以将该发光元件的光线反射而朝向该按键的前方引导并透出。 The backlight assembly of said key type claimed in claim 8, wherein: the turning point is provided with a reflective surface, light reflected to the light emitting element is guided toward the front and revealing the keys.
10.一种背光型按键总成,其特征在于:其包括:一按键;一导光元件,是围绕于该按键周围,该导光元件具有至少一弯折处、一入光端面及一出光端面,且该弯折处是设于该入光端面与该出光端面间;以及至少一发光元件,是设于该导光元件的入光端面前。 A backlit button assembly, characterized by: comprising: a key; a light guide member, around the periphery of the button in the light guiding element having at least one bend, a light incident surface and a light the end face, and the bending portion is disposed on the light incident surface of the light between the end surface; and at least one light-emitting element, is provided in the front end of the light into the light guiding element.
11.如权利要求10所述的背光型按键总成,其特征在于:该发光元件为发光二极管。 The backlight assembly of claim 10 type key claim, wherein: the light emitting element is a light emitting diode.
12.如权利要求10所述的背光型按键总成,其特征在于:该按键为一不透光元件。 The backlight assembly of claim 10 type key claim, wherein: the key comprises an opaque member.
13.如权利要求10所述的背光型按键总成,其特征在于:该发光元件为具有方向性的发光元件。 The backlight assembly of claim 10 type key claim, wherein: the light emitting element is a light emitting element having a directivity.
14.如权利要求10所述的背光型按键总成,其特征在于:该导光元件为聚碳酸酯材料。 The backlight assembly of claim 10 type key claim, wherein: the light guide element is a polycarbonate material.
15.如权利要求10所述的背光型按键总成,其特征在于:该导光元件为压克力材料。 The backlight assembly of claim 10 type key claim, wherein: the light guide element is of acrylic material.
16.如权利要求10所述的背光型按键总成,其特征在于:该导光元件的转折处设有一反射面,以将光线反射而朝向该按键的前方引导并透出。 16. backlit button assembly as claimed in claim 10, characterized in that: the turning of the light guide element is provided with a reflective surface to reflect the light guided toward the front and revealing the keys.
CN 200510067491 2005-04-26 2005-04-26 Light-negative button assembly CN1855332A (en)

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US10224157B2 (en) 2013-09-30 2019-03-05 Apple Inc. Keycaps having reduced thickness
US9704670B2 (en) 2013-09-30 2017-07-11 Apple Inc. Keycaps having reduced thickness
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