CN100363817C - 背光照明装置 - Google Patents
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Abstract
配置于液晶部件(2)的背面的框架具有这样的结构:其面板上设有与液晶部件(2)大致相同大小的开口部而形成薄箱体状,在该开口部上贴设光透过型的光扩散板。该框架上用保持夹将设有换流器电路(16)的换流器印刷电路板(14)和冷阴极管(22)直接或间接地结合为一体,使框架、换流器电路(16)和冷阴极管(22)构成的结构单一化。冷阴极管(22)的电极引线连接于换流器电路(16)的高压输出端子。在换流器印刷电路板(14)或框架上设有用以与外部布线连接的连接器(20),通过该连接器(20)向换流器电路(16)供给电源,从该换流器电路(16)向冷阴极管(22)的电极供给高压。从而,可实现液晶显示用背光照明装置的小型化与薄型化,并可提高组装时的安全性与可靠性。
Description
技术领域
本发明涉及用于个人计算机或汽车导航系统、电视等的液晶显示装置的背光照明装置。
背景技术
近年来,在个人计算机或电视、汽车导航系统等的液晶显示电子设备中,广泛使用带背光源的液晶显示装置。作为该背光源的光源,使用冷阴极管等的荧光管。
如图15所示,这种液晶显示装置由液晶部件2、设有冷阴极管4的灯部件6、液晶控制部件8、换流部件10和连接器12等构成,这些装置经由软线如图示那样电连接,可组装于个人计算机或汽车导航系统中。换流部件10通过连接器12被供给电源,液晶控制部件8通过连接器12被输入电源和控制信号。并且,近年来,也在开发将液晶部件和液晶控制部件一体化的产品。
在实现液晶显示装置小型化、薄型化时,将灯部件和换流部件分别另外构成极为不合适,不利于液晶显示装置的小型化。并且,若灯部件和换流部件分别另外构成,则存在连接换流部件和灯部件的高压供给电线变长并阻碍安全性的问题。
并且,若高压电线变长,则因接地之间的浮动电容导致电流泄漏,使电压在到达灯部分之前已下降。这种情况下,需重新调整换流部件的电路。
本发明的目的在于解决上述问题。
发明的公开
本发明中,设有配置于液晶部件的背面的框架、冷阴极管和装入了换流器的换流器印刷电路板,它们结合为一体而单一化。框架形成为薄箱体状,在该框架的面板上形成与液晶部件大小相同或接近相同的开口部。在所述框架的面板的开口部上设光透过型的光扩散板。所述冷阴极管的电极引线连接于所述换流器电路的高压输出端子,在所述框架或电路板上设有用以与外部布线进行连接的连接器,通过该连接器向所述换流器电路供给电源,从该换流器电路向所述冷阴极管的电极供给高压。
并且,本发明中,将所述换流器印刷电路板设于所述框架的内部,以用所述框架的内壁面围住该换流器印刷电路板的周围。
并且,本发明中,将所述换流器印刷电路板配置固定于所述框架的外壁面,使所述冷阴极管的引线穿过设于所述框架的孔导入到所述换流器印刷电路板的通孔内,并将所述引线连接到所述换流器印刷电路板的高压输出端子上。
并且,本发明中,设有换流器电路的换流器印刷电路板上通过保持夹将冷阴极管结合为一体,使换流器电路和冷阴极管构成的结构单一化,将所述冷阴极管的电极引线连接到所述换流器电路的高压输出端子上,在所述换流器印刷电路板上设置用以与外部布线进行连接的连接器,通过该连接器向所述换流器电路供给电源,并从该换流器电路向所述冷阴极管的电极供给高压。
并且,本发明中,在配置于所述液晶部件的背面的、其面板上设有与液晶部件大致相同大小的开口部而形成为薄箱体状的、在该开口部上设光透过型的光扩散板的框架上,固定地设置设有换流器电路的换流器印刷电路板,在该框架的内部配置冷阴极管,并通过保持夹将该冷阴极管和框架结合为一体,使框架、换流器电路和冷阴极管构成的结构单一化,在所述框架的内部配置与所述冷阴极管对置的丙烯板,将该丙烯板的表面配置于所述框架的开口部的对面,并将所述冷阴极管的电极引线连接到所述换流器电路的高压输出端子上,在所述框架或电路板上设置用以与外部布线进行连接的连接器,通过该连接器向所述换流器电路供给电源,从该换流器电路向所述冷阴极管的电极供给高压。
并且,本发明中,在设有换流器电路的换流器印刷电路板上向该电路板的侧方突出地配置冷阴极管,并在所述换流器印刷电路板上向该电路板的侧方突出地固定保持板,通过保持夹将该保持板和所述冷阴极管结合,使换流器电路、冷阴极管、保持板构成的结构单一化,将所述冷阴极管的电极引线连接到所述换流器电路的高压输出端子,在所述换流器印刷电路板上设置用以与外部布线进行连接的连接器,通过该连接器向所述换流器电路供给电源,从该换流器电路向所述冷阴极管的电极供给高压。
并且,本发明中,在配置于所述液晶部件的背面的、其面板上设有与液晶部件大致相同大小的开口部而形成薄箱体状的、该开口部上设有光透过型的光扩散板的框架上,固定地设置设有换流器电路的换流器印刷电路板,在该框架的内部配置冷阴极管,并在所述框架的内部向所述换流器印刷电路板的侧方突出地固定保持板,通过保持夹将该保持板和所述冷阴极管结合,使框架、换流器印刷电路板、冷阴极管及保持板构成的结构单一化,在所述框架上配置与所述冷阴极管对置的丙烯板,将该丙烯板的表面侧配置于所述框架的开口部的对面,并将所述冷阴极管的电极引线连接到所述换流器电路的高压输出端子,在所述框架或换流器印刷电路板上设置用以与外部布线进行连接的连接器,通过该连接器向所述换流器电路供给电源,从该换流器电路向所述冷阴极管的电极供给高压。
并且,本发明中,在所述框架上形成向所述丙烯板反射所述冷阴极管的光的镜面。
附图的简单说明
图1是表示本发明的实施例的A-A线剖视图;图2是说明本发明的实施例的正面图;图3是说明本发明的实施例的正面图;图4是B-B线剖视图;图5是表示本发明的另一实施例的正面图;图6是C-C线剖视图;图7是D-D线剖视图;图8是灯保持机构的说明图;图9是表示冷阴极管和印刷电路板的连接机构的剖视图;图10是说明本发明的另一实施例的正面图;图11是说明本发明的另一实施例的正面图;图12是说明本发明的另一实施例的正面图;图13是E-E线剖视图;图14是说明本发明的另一实施例的正面图;图15是传统技术的说明图。
本发明的最佳实施方式
以下参照附图就本发明的实施方式进行说明。
图2中,14表示由玻璃环氧树脂等构成的印刷电路板,其上用印刷布线技术形成包含陶瓷压电变压器或绕组变压器的高压发生电路即换流器电路16以及与该电路相连的调光电路18。在所述印刷电路板14的一侧设有连接器20,在该连接器20的输入侧设有被输入电源的两个端子和被输入调光信号的一个端子。所述换流器电路16与调光电路18连接于所述连接器20,经由连接器20,从外部被输入电源。并且,调光电路18通过连接器20被输入电源和调光信号。22表示U字形弯曲的以高压点亮的冷阴极管(CCFL),其两端用保持夹24固定于印刷电路板14上。冷阴极管22的一个电极引线26以最短距离焊接固定于换流器电路16的高压输出端子28,冷阴极管22的另一电极引线26焊接到印刷电路板14的接地电位端子30。从而,不需要在冷阴极管22的引线26和换流器电路16之间布置高压线。换流器电路16的另一输出端子32连接在接地电位。由上述印刷电路板14和冷阴极管22构成背光用照明装置。本发明的实施例在上述结构上附加了以下的结构。34表示框架,其面板上设有与液晶部件2(参照图15)大致相同大小的开口部,形成一侧开口的薄箱体结构。在框架34的开口部上贴设光透过型的光扩散板44,形成使光均匀照射的光均匀照射面。框架34设于液晶部件2的背面,并加以固定。因此,在框架34上设有用以将该框架34固定于液晶部件2的安装部(图示省略)以及将框架34固定于液晶显示电子设备的壳体的安装部(图示省略)。如图4所示,在框架34的U字形部上放置冷阴极管22。在框架34的背面将形成多个棱锥形的微小凸部的光反射型的光反射扩散板36配置固定,用该光反射扩散板36遮蔽框架34的背面开口部。在框架34的开口的中央部配置透明的丙烯板38,该丙烯板38三个方向的边缘被框架34的U字形部所支撑。所述丙烯板38将冷阴极管22的光从端面侧导入水平方向,在丙烯板38的正面侧形成均匀的白色光的照射面。所述框架34的U字形部的内面形成了将光反射到丙烯板38的端面方向的镜面34a。在框架34的正面侧开口部上层叠了透明的光扩散板40和导光板42,它们彼此相粘地配置,从而构成均匀的白色的光照射面,用该光照射面44遮蔽框架34的正面侧的开口部。构成所述光照射面44的光扩散板40与导光板42仅各自的一侧固定在所述框架34的U字形部的一侧,从而,回避其热收缩现象的影响。所述框架34的一个侧边34b的上部有缺口,该缺口端面与所述印刷电路板14的一个侧边对接,以该状态用螺钉46将一个侧边34b固定于印刷电路板14的一个侧边。所述丙烯板38的周围被支撑在印刷电路板14端面和框架34围成的四边形的保持空间内。在上述的结构中,冷阴极管22、印刷电路板14、框架34、光反射扩散板36、光扩散板40、导光板42以及丙烯板38结合为一体,整体地构成薄板状的组合式的背光装置。该背光照明装置重叠配置在液晶部件的背面,以照射液晶板。在上述实施例中,用灯保持夹24将冷阴极管22直接固定在印刷电路板14上,但冷阴极管22也可以固定在框架34上,并且,如图5至图9所示,也可采用这样的结构:相对于框架34另设一个灯保持板50,该灯保持板50上通过嵌入保持式的灯保持夹52保持冷阴极管22,用螺钉54将灯保持板50固定于印刷电路板14上。图6中,冷阴极管22与灯保持板50均在框架34的U字形部内松配合设置,框架34在形成了换流器电路16与调光电路18的印刷电路板14上用螺钉54固定。
本实施例中,除了基于灯保持板50的冷阴极管22的保持结构以外,与实施例1相同。如图7所示,冷阴极管22的两端配置在印刷电路板14上,该冷阴极管22的一端的电极的引线56,如图9所示,经由夹具59与印刷电路板14的换流器电路的高压输出端子58焊接,另一端的电极引线焊接在印刷电路板14的接地端。引线56也可不经夹具58直接焊接在印刷电路板14的高压输出端子58上。所述灯保持夹52由弹性体构成,从上部的间隙弹性的顶着保持夹52将冷阴极管22压入,以将该冷阴极管装入保持凹部52a内。
接着,参照图10就本发明的另一实施例进行说明。
60、62、64表示直管型的冷阴极管,其各一端部经由保持夹66,固定于形成了换流器电路16和调光电路18的印刷电路板14的一侧,其另一端经由保持夹70固定于由玻璃环氧树脂板等构成的支持板68。所述换流器电路16的高压输出端子72、74、76与各冷阴极管60、62、64一端的电极引线78焊接。所述换流器电路16的、与高压输出端子72、74、76成为一对的输出端子80,在印刷电路板14上接地。所述支持板68上形成了由导电体构成的导线82,该导线82与冷阴极管60、62、64的各另一端的电极引线84焊接。所述导线82通过设置于支持板68的连接器86、设置于印刷电路板14的连接器88和将连接器86、88连接的低电压软线90,在印刷电路板14上接地。
在上述结构中,所述换流器电路16通过设置于印刷电路板14的连接器20得到输入电源,通过连接器20将输入电源和调光信号输入到调光电路18,由换流器电路16控制冷阴极管60、62、64的点亮与亮度。还有,设有在液晶部件2的背面配置的、其面板上设有与液晶部件大致相同大小的开口部而形成为薄箱体状的、该开口部上贴设光透过型的光扩散板的框架,该框架内装有印刷电路板14、支持板68以及冷阴极管60、62、64,可将该框架、印刷电路板以及冷阴极管构成组件。
图11表示将多个U字形的冷阴极管92、94的两端用保持夹96固定于形成了换流器电路16和调光电路18的印刷电路板14的实施例。
换流器电路16的高压输出端子98、100与冷阴极管92、94的一端的电极引线焊接,与换流器电路16的高压输出端子成对的输出端子80连接在接地电位。冷阴极管92、94的另一端的电极引线通过焊接连接到印刷电路板16的接地电位。换流器电路16通过连接器20被输入电源,调光电路18通过连接器20被输入电源和调光信号。还有,与上述一样,本实施例也设有在液晶部件2的背面上配置的、其面板上设有与液晶部件2大致相同大小的开口部而形成为薄箱体状的、该开口部贴设了光透过型的光扩散板的框架,该框架内装有印刷电路板14、冷阴极管92、94,可将该框架、印刷电路板和冷阴极管构成组件。
接着,参照图12与图13就本发明的另一实施例进行说明。
102表示其面板上形成了开口部的由金属、塑料等构成的框架,构成为薄箱体状。框架102中设有:用以在电视等的液晶显示电子设备的壳体104上小螺钉106紧固的安装部108和用以在液晶部件2上螺钉112紧固的双头螺栓构成的安装部110。所述框架102的开口部上粘接了导光板112和光透过型的光扩散板114。所述开口部构成光照射面,该光照射面设定为与液晶部件2大致相同的大小。在所述框架102的底面形成了光反射型的光扩散面,且在该底面固定设置了截面为三角形的光反射板116。118表示冷阴极管,通过保持座120与保持夹122固定于框架102的底面。邻接于所述冷阴极管118的电极,在框架102的底面用小螺钉124固定有换流器印刷电路板14。所述冷阴极管118、118的一个电极引线126,通过焊接固定于换流器印刷电路板14的高压输出端子上,冷阴极管118、118的另一电极引线128,通过焊接连接到换流器印刷电路板14的接地电位端子。在框架102上设有连接器130,该连接器130与换流器印刷电路板14的连接器20相连。
在上述结构中,框架102、冷阴极管118、换流器印刷电路板14结合为一体,整个构成薄箱型的组件,该组件层叠安装于液晶部件2的背面,照射液晶部件2的液晶板。
还有,上述实施例将换流器印刷电路板14配置在框架102的内部而与外部隔开,但也可以如图14所示,固定在框架102的底部外壁面上,使内装于框架102的冷阴极管118的引线126、128穿过框架102的孔132导入到印刷电路板14的通孔内,将引线焊接在印刷电路板14上。
工业上的利用可能性
如上述那样,本发明将冷阴极管和换流器印刷电路板一体化,将两者组件化,因此,可实现背光照明装置整体的小型化与薄型化,并且,不需要高压布线,因此,具有可提高安全性和工作可靠性等的效果。
Claims (1)
1.一种背光照明装置,其特征在于:设有配置于液晶部件的背面的、其面板上设有与所述液晶部件大小相同或接近相同的开口部而形成薄箱体状的、该开口部上贴设光透过型光扩散板的框架,内装于所述框架的冷阴极管,以及设有换流器电路的换流器印刷电路板;将所述换流器印刷电路板固定于所述框架的底板的下面;所述框架、冷阴极管与换流器印刷电路板结合为一体而单一化;在所述框架上穿设孔,使所述冷阴极管的电极引线通过所述孔连接到所述换流器电路的高压输出端子;在所述换流器电路板上设置用以与外部布线连接的连接器,通过该连接器向所述换流器电路供给电源,从该换流器电路向所述冷阴极管的电极供给高压。
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US7090387B2 (en) | 2006-08-15 |
GB0419309D0 (en) | 2004-09-29 |
DE10392183B4 (de) | 2010-07-22 |
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GB2400966A (en) | 2004-10-27 |
TW200302948A (en) | 2003-08-16 |
DE10392183T5 (de) | 2005-01-05 |
KR100822666B1 (ko) | 2008-04-17 |
HK1069641A1 (en) | 2005-05-27 |
GB2400966B (en) | 2005-06-29 |
US20050047173A1 (en) | 2005-03-03 |
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CN1625712A (zh) | 2005-06-08 |
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