WO2014019437A1 - 一种屏幕软键盘字符的导光组件及触摸屏手机 - Google Patents

一种屏幕软键盘字符的导光组件及触摸屏手机 Download PDF

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Publication number
WO2014019437A1
WO2014019437A1 PCT/CN2013/078594 CN2013078594W WO2014019437A1 WO 2014019437 A1 WO2014019437 A1 WO 2014019437A1 CN 2013078594 W CN2013078594 W CN 2013078594W WO 2014019437 A1 WO2014019437 A1 WO 2014019437A1
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WIPO (PCT)
Prior art keywords
light
film
light guiding
soft keyboard
keyboard character
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Ceased
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PCT/CN2013/078594
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English (en)
French (fr)
Inventor
徐元良
江润来
廖广明
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Huizhou TCL Mobile Communication Co Ltd
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Huizhou TCL Mobile Communication Co Ltd
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Publication of WO2014019437A1 publication Critical patent/WO2014019437A1/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/22—Details of telephonic subscriber devices including a touch pad, a touch sensor or a touch detector

Definitions

  • the invention relates to the field of a touch screen mobile phone with a soft keyboard character disposed on a lower part of the screen surface, in particular to a light guide component and a touch screen mobile phone with a screen thickness soft keyboard character with ultra-thin thickness, high display brightness and no interference from the LCD display light source. .
  • the proportion of mobile phones using touch screens is getting higher and higher, and the touch buttons on the lower part of the touch screen often need to have a backlight effect, and the light-emitting diodes (Light) Emitting Diode, LED)
  • the advantage of directly placing the light source directly under the soft keyboard character on the touch screen cover is that the brightness of the soft keyboard character display is very high.
  • the disadvantage is that the requirement for the puzzle is high, and the position cannot directly place the light source in the soft. Just below the keyboard characters, each soft keyboard character needs to be lit by a corresponding LED, resulting in an increase in cost.
  • the light guide medium is required to direct the LED light source below the soft keyboard character on the touch screen cover.
  • the misalignment design of the LED light source and the soft keyboard characters on the touch screen cover may result in uneven brightness of the soft keyboard character display and the problem that some areas cannot be illuminated; and at the same time, due to the touch screen and the liquid crystal display (Liquid) Crystal Display, LCD)
  • the display is close to the screen, and some of the light from the LCD display will be disturbed to the soft keyboard character display on the touch screen cover.
  • the soft keyboard character is not lit, there will be some light from the LCD display. Affects the local position of soft keyboard characters.
  • the traditional light guiding medium includes the use of a special light guide plate for guiding the misaligned light path.
  • the thickness of the light guide plate to be injected needs to be at least 0.4 mm, which cannot meet the ultra-thin development direction of the current mobile phone. And need to open the injection mold, the production cost is higher.
  • the invention provides a light guiding component of a screen soft keyboard character, which has a thin thickness, high display brightness and is not interfered by the LCD display light source.
  • the invention also provides a touch screen mobile phone with good screen character display effect, ultra-thin thickness and low cost.
  • a light guiding component of a screen soft keyboard character is disposed on a back of the touch screen function board for guiding a soft keyboard character disposed on the touch screen cover, the soft keyboard character and the setting on the printed circuit board (Printed Circuit).
  • the LED lamps on the board and the PCB are offset from each other, wherein the light guiding component is composed of a light shielding film, a light guiding film and a light blocking film, and the light shielding film is located on the front surface of the light guiding film, and is partially disposed thereon.
  • an upper half of the light guiding film corresponds to the soft keyboard character
  • a lower half corresponds to the LED lamp
  • the light blocking film is located at the The upper half of the back surface of the light guiding film is used to prevent light emitted from the LCD screen from entering the light guiding film.
  • the light guiding component of the screen soft keyboard character wherein: a surface of the light guiding film is provided with a first stripe groove for diverging light.
  • the light guiding component of the screen soft keyboard character wherein: the bottom of the first stripe groove has an arc structure.
  • the light guiding component of the screen soft keyboard character wherein the first stripe groove is respectively disposed on a front surface and/or a back surface of the light guiding film.
  • the light guiding component of the screen soft keyboard character wherein: the first stripe grooves intersect each other to form an anilox groove.
  • the light guiding component of the screen soft keyboard character wherein: the first stripe groove is respectively disposed on an upper area of the light guiding film corresponding to the soft keyboard character and a lower area of the light guiding film corresponding to the LED lamp, A second stripe groove is disposed between the upper area of the light guiding film and the lower area of the light guiding film for communicating the first stripe groove in the adjacent area.
  • the light guiding component of the screen soft keyboard character wherein: the light guiding film is composed of an upper half segment having a rectangular zigzag shape and a lower half segment having a trapezoidal zigzag shape, and the upper half portion protruding from the upper half portion
  • the lower tooth portion protruding in the lower half corresponds to the LED lamp, and the adjacent upper and lower tooth portions are alternately arranged.
  • the light guiding component of the screen soft keyboard character wherein: the light shielding film is disposed as a black plastic film or a plastic film surface coated with a black pigment layer, and the light guiding film is disposed as a transparent plastic sheet, the block
  • the light film is provided as a white plastic film or a plastic film whose surface is coated with a white pigment layer.
  • the light guiding component of the screen soft keyboard character wherein: the thickness of the light shielding film and the light blocking film are set between 0.01 and 0.1 mm, and the thickness of the light guiding film is set at 0.1 to 0.2 mm between.
  • a touch screen mobile phone includes a touch screen and a touch screen cover thereon, and a soft keyboard character is disposed on the touch screen cover, wherein: the backlight component of the soft keyboard character comprises the screen soft keyboard according to any one of the above The light guiding component of the character.
  • the light guiding component of the screen soft keyboard character and the touch screen mobile phone provided by the invention adopts a light shielding film, a light guiding film and a light blocking film, and the soft keyboard characters on the touch screen cover and the LED above the PCB board
  • the misaligned optical path can be guided through the thin light guide film and the hollow hole on the light shielding film to obtain a high brightness display effect, and the light shielding film is used to block the light from the LCD display screen.
  • the light guiding film is not interfered by the light source of the LCD display.
  • the light guiding component of the invention has the advantages of simple structure and ultra-thin thickness, fully utilizing the thickness space of the touch screen adhesive, and does not need to open a special injection mold, thereby greatly reducing the light guiding portion. Production costs are also in line with the development trend of ultra-thin mobile phones.
  • Figure 1 is a longitudinal cross-sectional view of a touch screen handset of the present invention at a screen light keyboard character light guide assembly.
  • FIG. 2 is a partial schematic view showing the front projection of the touch screen mobile phone of the present invention.
  • FIG 3 is an exploded view of the character light guiding component of the screen soft keyboard of the present invention.
  • FIG. 4 is a front perspective view of the character light guide assembly of the screen soft keyboard of the present invention.
  • Figure 5 is a rear perspective view of the screen soft keyboard character light guiding assembly of the present invention.
  • FIG. 6 is a cross-sectional structural view of a light guiding film used in the character light guiding component of the screen soft keyboard of the present invention.
  • FIG. 1 is a longitudinal cross-sectional view of a touch screen mobile phone of the present invention at a screen soft keyboard character light guiding component
  • the touch screen mobile phone includes a main surface housing 100 , a PCB main board 200 , an LCD display module 300 , and a touch screen function board
  • the sensor 410 and the touch screen cover 420 are provided with a soft keyboard character 421 on the touch screen cover 420, and the soft keyboard character 421 may be located at a lower portion of the front surface of the touch screen cover 420 or a lower portion of the back surface of the PCB.
  • An LED lamp 210 is disposed on the board 200, and the LED lamp 210 is located at a lower portion of the front surface of the PCB board 200.
  • a light guiding component 500 of the screen soft keyboard character of the present invention is disposed at a lower portion of the back surface of the touch screen function board 410.
  • the soft keyboard character 421 located on the touch screen cover 420 is illuminated.
  • a first foam 610 as a backing of the touch screen cover 420 and a second bubble as a backing of the touch screen function board 410 are further disposed between the touch screen cover 420 and the main surface housing 100.
  • Cotton 620, the second foam 620 is located at the back of the first foam 610; the thickness of the first foam 610 is equivalent to the thickness of the touch screen function panel 410, and part of the first foam 610 is further.
  • the light guide assembly 500 of the screen soft keyboard character of the present invention fully utilizes the thickness space of the second foam 620, which can be said to be It is completely embedded in the cavity of the second foam 620, so that no additional thickness is added to the mobile phone.
  • the touch screen cover 420 is soft.
  • the keyboard characters 421 are spatially offset from the LED lights 210 on the PCB board 200, including lateral misalignment and longitudinal misalignment on the screen projection surface, and the upper half of the light guide assembly 500 covers the soft keyboard characters.
  • the lower half of the light guiding assembly 500 covers the screen projection area of the LED lamp 210.
  • the light guiding component 500 is composed of a light shielding film 510, a light guiding film 520 and a light blocking film 530 in order from front to back.
  • the light shielding film 510 is attached to the front surface of the light guiding film 520, and a hollow hole 511 is disposed on the light shielding film 510 to be hollowed out at a soft keyboard character corresponding to the touch screen cover after assembly.
  • the hole 511 includes, but is not limited to, a hollow square hole or a circular hole or the like, and the shape of the light shielding film 510 is adapted to the shape of the light guiding film 520.
  • the upper half of the light guiding film 520 has a rectangular tooth shape, and the upwardly protruding upper tooth portion corresponds to the soft keyboard character on the touch screen cover after assembly, and the lower half of the light guiding film 520 has a trapezoidal shape.
  • the toothed, downwardly projecting lower tooth portion corresponds to the LED light on the PCB board after assembly.
  • the light blocking film 530 is disposed in the upper half of the light guiding film 520, and the shape of the light blocking film 530 is matched with the shape of the upper half of the light guiding film 520, and is used to block the LCD after assembly.
  • the light emitted by the display enters the light guiding film 520 to avoid affecting the unlit soft keyboard characters when the LCD display is lit.
  • the light guiding film 520 may be composed of an upper half segment having a rectangular zigzag shape and a lower half segment having a trapezoidal zigzag shape, and the upper tooth portion protruding from the upper half portion corresponds to the soft keyboard character.
  • the lower tooth portion protruding in the lower half corresponds to the LED lamp, and the adjacent upper and lower tooth portions are alternately arranged.
  • a first stripe groove 521 for diverging light is further disposed on the surface of the light guiding film 520 to enhance transparent light guiding through the structure.
  • the first stripe groove 521 may be disposed on the front surface and/or the back surface of the light guiding film 520.
  • the first stripe groove 521 is respectively disposed on an upper area of the light guiding film corresponding to the soft keyboard character and a lower area of the light guiding film corresponding to the LED lamp, and the upper area of the light guiding film and the light guiding layer
  • a second stripe groove 522 is further disposed between the sub-film regions for communicating with the first stripe groove 521 in the adjacent region to enhance the light guiding effect of the light guiding film 520.
  • the light shielding film 510 may be made of a black plastic film or a plastic film coated with a black pigment layer.
  • the light guiding film 520 may be made of a transparent plastic sheet, and the light blocking film 530 may be made of white plastic.
  • the film or the surface is coated with a plastic film of a white pigment layer.
  • the thickness of the light shielding film 510 and the light blocking film 530 are controlled to be between 0.01 and 0.1 mm, and the thickness of the light guiding film 520 is controlled to be between 0.1 and 0.2 mm, so that the guide thus formed
  • the total thickness of the optical component is controlled between 0.12 and 0.4 mm, which may be determined according to the size of the mobile phone and the thickness of the second adhesive of the touch screen.
  • FIG. 4 is a front perspective view of the screen soft keyboard character light guiding component of the present invention.
  • the light shielding film 510 is disposed on the front surface of the light guiding film 520 after being adhered to the front surface of the light guiding film 520.
  • the first stripe groove 521 is exposed from the hollow hole 511 on the light shielding film 510 to emit more light, so that the soft keyboard characters on the touch screen cover appear brighter.
  • FIG. 5 is a rear perspective view of the screen soft keyboard character light guiding component of the present invention.
  • the light blocking film 530 is disposed under the light guiding film 520 after being attached to the back surface of the light guiding film 520.
  • the first stripe groove 521 on the back side of the half section is not blocked by the light blocking film 530 to absorb more light from the LED lamp on the PCB board.
  • the first stripe grooves 521 on the front surface and/or the back surface of the light guiding film 520 cross each other to form an anilox groove to further improve the light guiding efficiency of the transparent light guiding film 520 by the structure.
  • FIG. 6 is a cross-sectional structural view of a light guiding film used in the character light guiding component of the screen soft keyboard of the present invention, and the first stripe groove 521 and the second stripe on the light guiding film 520.
  • the bottom of the groove 522 has an arc structure.
  • iron core hot pressing method including but not limited to the use of iron core hot pressing method.
  • the present invention further provides a touch screen mobile phone, comprising a touch screen and a touch screen cover plate thereover, wherein the touch screen cover is provided with a soft keyboard character, wherein: the soft keyboard
  • the backlight assembly of the character includes the light guiding component of the screen soft keyboard character described in any one of the above.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Telephone Set Structure (AREA)
  • Push-Button Switches (AREA)

Description

一种屏幕软键盘字符的导光组件及触摸屏手机 技术领域
本发明涉及屏幕表面的下部设置有软键盘字符的触摸屏手机领域，尤其涉及的是一种厚度超薄、显示亮度高且不受LCD显示屏光源干扰的屏幕软键盘字符的导光组件及触摸屏手机。
 背景技术
目前手机使用触摸屏的比例越来越高，对于触摸屏下部的触摸按键往往需要有背光的效果，将发光二极管（Light Emitting Diode，LED）光源直接置于触摸屏盖板上的软键盘字符正下方的优点是，软键盘字符显示的亮度很高，缺点是对拼板的要求较高，部分位置无法直接将光源置于软键盘字符的正下方，每个软键盘字符都需要对应一个LED来点亮，导致成本增加。
出于整机长宽尺寸的限制，难以通过在触摸屏盖板上的软键盘字符正下方直接加LED灯的方式来点亮背光，这就造成了软键盘字符与LED灯错位状况的设计，通常需要利用导光介质将LED光源引导到触摸屏盖板上的软键盘字符下方。
但是，将LED光源与触摸屏盖板上的软键盘字符错位设计，会导致软键盘字符显示的亮度不均匀，以及部分区域无法点亮的问题；同时由于触摸屏与液晶显示器（Liquid Crystal Display，LCD）显示屏紧贴，还会导致LCD显示屏点亮后的部分光线干扰到触摸屏盖板上的软键盘字符显示，在软键盘字符不点亮时也会有部分LCD显示屏的光线影响到软键盘字符的局部位置。
传统的导光介质包括采用注塑出专用的导光板来引导错位的光路，但是受制于当前注塑条件的限制，注塑出的导光板厚度最少需要做到0.4mm，无法满足目前手机的超薄发展方向，而且需要加开注塑模具，生产成本较高。
因此，现有技术尚有待改进和发展。
 技术问题
本发明提供一种屏幕软键盘字符的导光组件，厚度薄、显示亮度高且不受LCD显示屏光源干扰。
同时，本发明还提供一种屏幕软键盘字符显示效果好、厚度超薄、成本低的触摸屏手机。
 技术解决方案
一种屏幕软键盘字符的导光组件，设置在触摸屏功能板的背面，用于导亮设置在触摸屏盖板上的软键盘字符，所述软键盘字符与设置在印制电路板（Printed Circuit Board，PCB）上的LED灯相互错位，其中：该导光组件由遮光膜、导光膜和挡光膜相贴合组成，所述遮光膜位于所述导光膜的正面，其上局部设置有与所述软键盘字符相对应的镂空孔，所述导光膜的上半段与所述软键盘字符相对应，下半段与所述LED灯相对应，所述挡光膜位于所述导光膜背面的上半段，用于阻止LCD显示屏发出的光线进入所述导光膜。
所述的屏幕软键盘字符的导光组件，其中：所述导光膜的表面上设置有用于发散光线的第一条纹槽。
所述的屏幕软键盘字符的导光组件，其中：所述第一条纹槽的底部呈弧形结构。
所述的屏幕软键盘字符的导光组件，其中：在所述导光膜的正面和/或背面分别设置所述第一条纹槽。
所述的屏幕软键盘字符的导光组件，其中：所述第一条纹槽相互交叉形成网纹槽。
所述的屏幕软键盘字符的导光组件，其中：所述第一条纹槽分别设置在对应所述软键盘字符的导光膜上区域和对应所述LED灯的导光膜下区域，所述导光膜上区域与导光膜下区域之间设置有第二条纹槽，用于连通相邻区域内的第一条纹槽。
所述的屏幕软键盘字符的导光组件，其中：所述导光膜由呈矩形锯齿状的上半段和呈梯形锯齿状的下半段组成，所述上半段凸出的上齿部与所述软键盘字符相对应，所述下半段凸出的下齿部与所述LED灯相对应，相邻的上齿部与下齿部之间相互交错设置。
所述的屏幕软键盘字符的导光组件，其中：所述遮光膜设置为黑色塑料膜或表面涂覆有黑色颜料层的塑料膜，所述导光膜设置为透明的塑料片，所述挡光膜设置为白色塑料膜或表面涂覆有白色颜料层的塑料膜。
所述的屏幕软键盘字符的导光组件，其中：所述遮光膜和所述挡光膜的厚度均设置在0.01~0.1mm之间，所述导光膜的厚度设置在0.1~0.2mm之间。
一种触摸屏手机，包括触摸屏和其上方的触摸屏盖板，在所述触摸屏盖板上设置有软键盘字符，其中：所述软键盘字符的背光组件包括上述中任一项所述的屏幕软键盘字符的导光组件。
 有益效果
本发明所提供的一种屏幕软键盘字符的导光组件及触摸屏手机，由于采用了遮光膜、导光膜和挡光膜，在触摸屏盖板之上的软键盘字符与PCB板之上的LED灯相错位的设计中，可经由厚度较薄的导光膜和遮光膜上的镂空孔来引导错位的光路，以获得高亮度的显示效果，同时利用遮光膜以阻挡LCD显示屏发出的光线进入导光膜，以免受到LCD显示屏光源干扰，本发明的导光组件结构简单，厚度超薄，充分利用了触摸屏背胶的厚度空间，而且不用开设专门的注塑模具，大大降低了导光部分的生产成本，也顺应了超薄手机的发展趋势。
 附图说明
图1是本发明触摸屏手机在屏幕软键盘字符导光组件处的纵向剖视图。
图2是本发明触摸屏手机的正面投影局部示意图。
图3是本发明屏幕软键盘字符导光组件的分解图。
图4是本发明屏幕软键盘字符导光组件的正面立体图。
图5是本发明屏幕软键盘字符导光组件的背面立体图。
图6是本发明屏幕软键盘字符导光组件所用导光膜的剖视结构示意图。
 本发明的最佳实施方式
以下将结合附图，对本发明的具体实施方式和实施例加以详细说明，所描述的具体实施例仅用以解释本发明，并非用于限定本发明的具体实施方式。
如图1所示，图1是本发明触摸屏手机在屏幕软键盘字符导光组件处的纵向剖视图，该触摸屏手机包括主面壳体100、PCB主板200、LCD显示模组300、触摸屏功能板(sensor)410和触摸屏盖板420，在所述触摸屏盖板420上设置有软键盘字符421，所述软键盘字符421可位于所述触摸屏盖板420正面的下部或背面的下部，在所述PCB板200上设置有LED灯210，所述LED灯210位于所述PCB板200正面的下部；在所述触摸屏功能板410背面的下部设置有本发明屏幕软键盘字符的导光组件500，用于导亮位于触摸屏盖板420上的软键盘字符421。
此外，所述触摸屏盖板420与所述主面壳体100之间还设置有作为所述触摸屏盖板420背胶的第一泡棉610和作为所述触摸屏功能板410背胶的第二泡棉620，所述第二泡棉620位于所述第一泡棉610的背面；所述第一泡棉610的厚度与所述触摸屏功能板410的厚度相当，部分所述第一泡棉610还延伸设置在所述触摸屏功能板410与所述LCD显示模组300之间，而本发明屏幕软键盘字符的导光组件500就充分利用了所述第二泡棉620的厚度空间，可以说是完全镶嵌在所述第二泡棉620的孔腔中，因此并没有给手机增加额外的厚度。
结合图2所示，图2是本发明触摸屏手机的正面投影局部示意图，以四个一排的软键盘字符421和三个一排的LED灯210为例，所述触摸屏盖板420上的软键盘字符421与所述PCB板200上的LED灯210在空间上相互错位，包括在屏幕投影面上横向的错位和纵向的错位，所述导光组件500的上半段覆盖所述软键盘字符421的屏幕投影区域，所述导光组件500的下半段覆盖所述LED灯210的屏幕投影区域。
结合图3所示，图3是本发明屏幕软键盘字符导光组件的分解图，该导光组件500由前到后依次由遮光膜510、导光膜520和挡光膜530相贴合组成，所述遮光膜510贴合在所述导光膜520的正面，在所述遮光膜510上设置有镂空孔511，以在装配后对应所述触摸屏盖板的软键盘字符处，所述镂空孔511包括但不限于镂空的方孔或圆孔等，所述遮光膜510的形状与所述导光膜520的形状相适配。
所述导光膜520的上半段呈矩形齿状，向上突出的上齿部在装配后与所述触摸屏盖板上的软键盘字符相对应，所述导光膜520的下半段呈梯形齿状，向下突出的下齿部在装配后与所述PCB板上的LED灯相对应。
所述挡光膜530设置在所述导光膜520的上半段，所述挡光膜530的形状与所述导光膜520上半段的形状相适配，在装配后用于阻止LCD显示屏发出的光线进入所述导光膜520，避免因LCD显示屏点亮时对不亮的软键盘字符造成影响。
具体的，所述导光膜520可由呈矩形锯齿状的上半段和呈梯形锯齿状的下半段组成，所述上半段凸出的上齿部与所述软键盘字符相对应，所述下半段凸出的下齿部与所述LED灯相对应，相邻的上齿部与下齿部之间相互交错设置。在实现工艺上可用过冲裁模进行批量化生产。
在本发明屏幕软键盘字符导光组件的优选实施方式中，进一步地，在所述导光膜520的表面上进而设置有用于发散光线的第一条纹槽521，以通过结构提高透明的导光膜的导光效率，具体的，可在所述导光膜520的正面和/或背面分别设置所述第一条纹槽521。
较好的是，所述第一条纹槽521分别设置在对应所述软键盘字符的导光膜上区域和对应所述LED灯的导光膜下区域，所述导光膜上区域与导光膜下区域之间还设置有第二条纹槽522，用于连通相邻区域内的第一条纹槽521，以增强所述导光膜520的导光效果。
具体的，所述遮光膜510可采用黑色塑料膜或表面涂覆有黑色颜料层的塑料膜制作，所述导光膜520可选用透明的塑料片制作，所述挡光膜530可采用白色塑料膜或表面涂覆有白色颜料层的塑料膜制作。
具体的，所述遮光膜510和所述挡光膜530的厚度均控制在0.01~0.1mm之间，所述导光膜520的厚度控制在0.1~0.2mm之间，使得由此组成的导光组件的总厚度控制在0.12~0.4mm之间，具体可根据手机的大小和触摸屏第二背胶的厚度确定。
结合图4所示，图4是本发明屏幕软键盘字符导光组件的正面立体图，所述遮光膜510与所述导光膜520的正面相贴合后，位于所述导光膜520正面的第一条纹槽521从所述遮光膜510上的镂空孔511处露出，以将更多的光线散发出来，使所述触摸屏盖板上的软键盘字符显得更加明亮。
结合图5所示，图5是本发明屏幕软键盘字符导光组件的背面立体图，所述挡光膜530与所述导光膜520的背面相贴合后，位于所述导光膜520下半段背面的第一条纹槽521并没有被所述挡光膜530所遮挡，以吸收更多的所述PCB板上的LED灯发出的光线。
较好的是，所述导光膜520正面和/或背面的第一条纹槽521相互交叉形成网纹槽，以进一步通过结构提高透明的导光膜520的导光效率。
较好的是，结合图6所示，图6是本发明屏幕软键盘字符导光组件所用导光膜的剖视结构示意图，所述导光膜520上的第一条纹槽521和第二条纹槽522的底部均呈弧形结构。在实现工艺上包括但不限于采用铁芯热压的方式制出。
基于上述屏幕软键盘字符的导光组件，本发明还提出了一种触摸屏手机，包括触摸屏和其上方的触摸屏盖板，在所述触摸屏盖板上设置有软键盘字符，其中：所述软键盘字符的背光组件包括上述中任一项所述的屏幕软键盘字符的导光组件。由此可获得一种屏幕软键盘字符显示效果好、厚度超薄、成本低的触摸屏手机。
应当理解的是，以上所述仅为本发明的较佳实施例而已，并不足以限制本发明的技术方案，对本领域普通技术人员来说，在本发明的精神和原则之内，可以根据上述说明加以增减、替换、变换或改进，而所有这些增减、替换、变换或改进后的技术方案，都应属于本发明所附权利要求的保护范围。
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  1. 一种屏幕软键盘字符的导光组件，设置在触摸屏功能板的背面，用于导亮设置在触摸屏盖板上的软键盘字符；所述软键盘字符与设置在印制电路板上的发光二极管相互错位，其中所述导光组件包括：
    遮光膜；
    导光膜，其中所述遮光膜、所述导光膜和所述挡光膜相贴合组成所述导光组件，所述遮光膜位于所述导光膜的正面，其上局部设置有与所述软键盘字符相对应的镂空孔，所述导光膜包括呈矩形锯齿状的上半段和呈梯形锯齿状的下半段，所述上半段凸出的上齿部与所述软键盘字符相对应，所述下半段凸出的下齿部与所述发光二极管相对应，相邻的上齿部与下齿部之间相互交错设置，所述导光膜的表面上设置有用于发散光线的第一条纹槽；所述挡光膜位于所述导光膜背面的上半段，用于阻止液晶显示器显示屏发出的光线进入所述导光膜。
  2. 根据权利要求1所述的屏幕软键盘字符的导光组件，其中所述第一条纹槽的底部呈弧形结构。
  3. 根据权利要求1所述的屏幕软键盘字符的导光组件，其中在所述导光膜的正面和/或背面分别设置所述第一条纹槽。
  4. 根据权利要求1所述的屏幕软键盘字符的导光组件，其中所述第一条纹槽相互交叉形成网纹槽。
  5. 根据权利要求1所述的屏幕软键盘字符的导光组件，其中所述第一条纹槽分别设置在对应所述软键盘字符的导光膜上区域和对应所述发光二极管的导光膜下区域，所述导光膜上区域与导光膜下区域之间设置有第二条纹槽，用于连通相邻区域内的第一条纹槽。
  6. 根据权利要求1所述的屏幕软键盘字符的导光组件，其中所述遮光膜设置为黑色塑料膜或表面涂覆有黑色颜料层的塑料膜，所述导光膜设置为透明的塑料片，所述挡光膜设置为白色塑料膜或表面涂覆有白色颜料层的塑料膜。
  7. 根据权利要求1所述的屏幕软键盘字符的导光组件，其中所述遮光膜和所述挡光膜的厚度均设置在0.01~0.1mm之间，所述导光膜的厚度设置在0.1~0.2mm之间。
  8. 一种屏幕软键盘字符的导光组件，设置在触摸屏功能板的背面，用于导亮设置在触摸屏盖板上的软键盘字符，所述软键盘字符与设置在印制电路板上的发光二极管相互错位，其中该导光组件包括：
    遮光膜；
    导光膜，其中所述遮光膜、所述导光膜和所述挡光膜相贴合组成所述导光组件，所述遮光膜位于所述导光膜的正面，其上局部设置有与所述软键盘字符相对应的镂空孔，所述导光膜的上半段与所述软键盘字符相对应，下半段与所述发光二极管相对应，所述挡光膜位于所述导光膜背面的上半段，用于阻止液晶显示器显示屏发出的光线进入所述导光膜。
  9. 根据权利要求8所述的屏幕软键盘字符的导光组件，其中所述导光膜的表面上设置有用于发散光线的第一条纹槽。
  10. 根据权利要求9所述的屏幕软键盘字符的导光组件，其中所述第一条纹槽的底部呈弧形结构。
  11. 根据权利要求9所述的屏幕软键盘字符的导光组件，其中在所述导光膜的正面和/或背面分别设置所述第一条纹槽。
  12. 根据权利要求9所述的屏幕软键盘字符的导光组件，其中所述第一条纹槽相互交叉形成网纹槽。
  13. 根据权利要求9所述的屏幕软键盘字符的导光组件，其中所述第一条纹槽分别设置在对应所述软键盘字符的导光膜上区域和对应所述发光二极管的导光膜下区域，所述导光膜上区域与导光膜下区域之间设置有第二条纹槽，用于连通相邻区域内的第一条纹槽。
  14. 根据权利要求8所述的屏幕软键盘字符的导光组件，其中所述导光膜由呈矩形锯齿状的上半段和呈梯形锯齿状的下半段组成，所述上半段凸出的上齿部与所述软键盘字符相对应，所述下半段凸出的下齿部与所述发光二极管相对应，相邻的上齿部与下齿部之间相互交错设置。
  15. 根据权利要求8所述的屏幕软键盘字符的导光组件，其中所述遮光膜设置为黑色塑料膜或表面涂覆有黑色颜料层的塑料膜，所述导光膜设置为透明的塑料片，所述挡光膜设置为白色塑料膜或表面涂覆有白色颜料层的塑料膜。
  16. 根据权利要求8所述的屏幕软键盘字符的导光组件，其中所述遮光膜和所述挡光膜的厚度均设置在0.01~0.1mm之间，所述导光膜的厚度设置在0.1~0.2mm之间。
  17. 一种触摸屏手机，包括触摸屏和其上方的触摸屏盖板，在所述触摸屏盖板上设置有软键盘字符，其中所述软键盘字符的背光组件包括一屏幕软键盘字符的导光组件，设置在触摸屏功能板的背面，用于导亮设置在触摸屏盖板上的软键盘字符，所述软键盘字符与设置在印制电路板上的发光二极管相互错位，该导光组件包括：
    遮光膜；
    导光膜，其中所述遮光膜、所述导光膜和所述挡光膜相贴合组成所述导光组件，所述遮光膜位于所述导光膜的正面，其上局部设置有与所述软键盘字符相对应的镂空孔，所述导光膜的上半段与所述软键盘字符相对应，下半段与所述发光二极管相对应，所述挡光膜位于所述导光膜背面的上半段，用于阻止液晶显示器显示屏发出的光线进入所述导光膜。
  18. 根据权利要求17所述的触摸屏手机，其中所述导光膜的表面上设置有用于发散光线的第一条纹槽。
  19. 根据权利要求18所述的触摸屏手机，其中所述第一条纹槽分别设置在对应所述软键盘字符的导光膜上区域和对应所述发光二极管的导光膜下区域，所述导光膜上区域与导光膜下区域之间设置有第二条纹槽，用于连通相邻区域内的第一条纹槽。
  20. 根据权利要求17所述的触摸屏手机，其中所述导光膜由呈矩形锯齿状的上半段和呈梯形锯齿状的下半段组成，所述上半段凸出的上齿部与所述软键盘字符相对应，所述下半段凸出的下齿部与所述发光二极管相对应，相邻的上齿部与下齿部之间相互交错设置。
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