技术领域technical field
本发明有关于一种背光模组，详而言之，关于一种可以提升发光键盘的整体发光效果的背光模组。The present invention relates to a backlight module, in particular, to a backlight module capable of improving the overall luminous effect of a luminous keyboard.
背景技术Background technique
键盘上的按键都会被标示代表着输入指令的识别符号，使用者按压键盘的按键而进行操作时，键盘会将按键识别符号所代表的输入指令输入给电脑，因而键盘是电脑使用上不可或缺的指令输入配件之一。但，当键盘于昏暗环境操作时，使用者可能无法看清键盘上每颗按键所标示的识别符号，此时使用者对于键盘的操作将会出现困难。The keys on the keyboard will be marked with identification symbols representing input commands. When the user presses the keys of the keyboard to operate, the keyboard will input the input commands represented by the key identification symbols to the computer, so the keyboard is indispensable for computer use. One of the command input accessories. However, when the keyboard is operated in a dark environment, the user may not be able to see the identification symbols marked on each key on the keyboard. At this time, the user will have difficulties in operating the keyboard.
因此，遂有发光键盘的设计，现有的发光键盘主要藉由内部背光模组的设置，背光模组具有发光体以及导光板，其中，发光体的出光可在导光板中传递，使得键盘按键上的识别符号发光，而让使用者于昏暗环境中操作键盘时，可确认键盘上每颗键帽的功能以及所在位置。Therefore, there is a design of a luminous keyboard. The existing luminous keyboard is mainly provided with an internal backlight module. The backlight module has a luminous body and a light guide plate, wherein the light emitted by the luminous body can be transmitted in the light guide plate, so that the keyboard keys The identification symbols on the keyboard are illuminated, allowing the user to confirm the function and location of each keycap on the keyboard when operating the keyboard in a dark environment.
背光模组中发光体的设置常会受限于各种因素(举例而言，背光模组内部容许设置发光体的空间有限，或者为求降低制造成本，希望所需要设置的发光体数量愈少愈好，或设置发光体的电路板面积愈小愈好)，因而背光模组中发光体的设置数量无法无限增加，导致背光模组中相邻的发光体间必然隔开有一定距离。The setting of illuminants in the backlight module is often limited by various factors (for example, the space for setting illuminants inside the backlight module is limited, or in order to reduce manufacturing costs, it is desirable to have fewer illuminants and more better, or the smaller the area of the circuit board where the illuminants are placed, the better), so the number of illuminants in the backlight module cannot be increased infinitely, resulting in a certain distance between adjacent illuminants in the backlight module.
然，发光体的出光角度范围有限，且光线在导光板中的传递会有光能衰减，若发光体的数量又无法增加，使得导光板中常会有部分区域的光线强度较弱，即产生背光模组中不同区域的发光亮度不一致的问题。如此，就会让使用者感受到使用中的发光键盘，不同区域的按键识别符号的发光亮度不一致。However, the light output angle range of the illuminant is limited, and the light energy will be attenuated when the light is transmitted in the light guide plate. If the number of illuminants cannot be increased, the light intensity in some areas of the light guide plate will often be weak, that is, backlight will be generated. The problem that the luminous brightness of different areas in the module is inconsistent. In this way, the user will feel the luminous keyboard in use, and the luminance of the key identification symbols in different areas is inconsistent.
是以，如何消除背光模组中不同区域的发光亮度不一致的问题，以提升发光键盘的整体发光效果的均匀度，遂为现在业界亟欲挑战克服的技术议题。Therefore, how to eliminate the problem of inconsistent luminance in different areas of the backlight module so as to improve the uniformity of the overall luminous effect of the luminous keyboard is a technical issue that the industry is eager to challenge and overcome.
发明内容Contents of the invention
因此，本发明的目的之一在于提供一种背光模组，以解决现有技术中背光模组不同区域亮度不一致的问题。Therefore, one of the objectives of the present invention is to provide a backlight module to solve the problem of inconsistency in brightness in different areas of the backlight module in the prior art.
本发明提出一种背光模组，包括导光板、电路板与复数个反光体。导光板具有第一区域与第二区域。电路板具有第一光源与第二光源，第一光源以第一角度的出光角度出光，第二光源以第三角度的出光角度出光。第一光源出光面与第一区域的距离大于第二光源出光面与第二区域的距离。该复数个反光体设于电路板邻近第一光源的位置，分别位于第一光源出光面的左、右两侧。其中，第一光源的部分出光会受到该复数个反光体的反射，以对第一区域提供光扩散角度为第二角度的照明，其中，第二角度小于第一角度；第二光源的出光对第二区域提供光扩散角度为第四角度的照明，其中，第四角度与第三角度相同或接近。The invention provides a backlight module, which includes a light guide plate, a circuit board and a plurality of light reflectors. The light guide plate has a first area and a second area. The circuit board has a first light source and a second light source. The first light source emits light at a first light emitting angle, and the second light source emits light at a third light emitting angle. The distance between the light emitting surface of the first light source and the first area is greater than the distance between the light emitting surface of the second light source and the second area. The plurality of reflectors are arranged on the circuit board adjacent to the first light source, respectively on the left and right sides of the light-emitting surface of the first light source. Wherein, part of the light emitted by the first light source will be reflected by the plurality of light reflectors to provide illumination to the first region with a light diffusion angle of a second angle, wherein the second angle is smaller than the first angle; The second area provides illumination with a light diffusion angle of a fourth angle, wherein the fourth angle is the same as or close to the third angle.
作为进一步可选的技术方案，该复数个反光体反光面与该第一光源出光面法线的延伸交角为15至30度。As a further optional technical solution, the extending angle between the reflective surfaces of the plurality of reflectors and the normal of the light-emitting surface of the first light source is 15 to 30 degrees.
作为进一步可选的技术方案，该复数个反光体包含电阻与焊锡，该电阻的部分表面为反光表面，并通过该焊锡而固定到该电路板上，该复数个反光体利用该电阻的该反光表面与该焊锡的金属表面来进行光线反射。As a further optional technical solution, the plurality of reflectors include resistors and solder, part of the surface of the resistors is a reflective surface, and are fixed to the circuit board through the solder, and the plurality of reflectors utilize the light reflection of the resistors Surface and the metal surface of the solder to perform light reflection.
作为进一步可选的技术方案，该复数个反光体为金属。As a further optional technical solution, the plurality of reflectors are metal.
作为进一步可选的技术方案，该复数个反光体的数量跟该第一光源与该第二光源的数量总和一致。As a further optional technical solution, the number of the plurality of reflectors is the same as the sum of the numbers of the first light source and the second light source.
作为进一步可选的技术方案，该第一角度相等于该第三角度。As a further optional technical solution, the first angle is equal to the third angle.
本发明还提出一种背光模组，包括导光板、第一光源、至少两个反光体与第二光源。第一光源用于对导光板的第一区域出光，原始的出光角度为第一角度，第一光源与导光板的该第一区域的间距为第一距离。该至少两个反光体设于邻近第一光源的位置，分别位于第一光源出光面的左、右两侧，用于反射第一光源的部分出光，使第一光源对该导光板的有效的出光角度为第二角度，其中，第二角度小于第一角度。第二光源用于对导光板的第二区域出光，原始的出光角度为第三角度，且对导光板的有效的出光角度为第四角度，其中，第三角度与第四角度相同或接近，第二光源与导光板的该第二区域的间距为第二距离，第一距离大于第二距离。The invention also proposes a backlight module, which includes a light guide plate, a first light source, at least two light reflectors, and a second light source. The first light source is used to emit light to the first area of the light guide plate, the original light output angle is a first angle, and the distance between the first light source and the first area of the light guide plate is a first distance. The at least two light reflectors are arranged adjacent to the first light source, respectively on the left and right sides of the light-emitting surface of the first light source, and are used to reflect part of the light emitted by the first light source, so that the first light source can provide an effective The light emitting angle is a second angle, wherein the second angle is smaller than the first angle. The second light source is used to emit light to the second area of the light guide plate, the original light emission angle is the third angle, and the effective light emission angle to the light guide plate is the fourth angle, wherein the third angle is the same as or close to the fourth angle, The distance between the second light source and the second region of the light guide plate is a second distance, and the first distance is greater than the second distance.
本发明另提出一种背光模组，包括导光板、电路板与复数个反光体。导光板具有第一区域与第二区域。电路板具有第一光源与第二光源，第一光源可对第一区域提供照明，而提供包含第一区域的第一光扩散范围，第二光源可对第二区域提供照明，而提供包含第二区域的第二光扩散范围。该复数个反光体分别设置在电路板上第一光源的出光面的左、右两侧，用于反光第一光源的部分出光，藉以控制第一光扩散范围，且使第一光扩散范围的扩散角度小于第二光扩散范围的扩散角度。The present invention further provides a backlight module, which includes a light guide plate, a circuit board, and a plurality of light reflectors. The light guide plate has a first area and a second area. The circuit board has a first light source and a second light source, the first light source can provide illumination to the first area, and provide a first light diffusion range including the first area, the second light source can provide illumination to the second area, and provide illumination for the second area. The second light diffusion range of the second area. The plurality of light reflectors are respectively arranged on the left and right sides of the light emitting surface of the first light source on the circuit board, and are used to reflect part of the light emitted by the first light source, so as to control the first light diffusion range, and make the first light diffusion range The diffusion angle is smaller than that of the second light diffusion range.
本发明又提出一种背光模组，包括导光板、电路板、第一反光体与第二反光体。导光板具有第一区域与第二区域。电路板具有第一光源与第二光源，第一光源与第二光源具有相同的第一出光角度，第一光源照向第一区域，第二光源照向第二区域，第一光源与第一区域的距离大于第二光源与第二区域的距离。第一反光体设于电路板上邻近第一光源的出光面左侧的位置，且位于第一光源的第一出光角度的光扩散范围内。第二反光体设于电路板上邻近第一光源的出光面右侧的位置，且位于第一光源的第一出光角度的光扩散范围内；其中，第一光源的部分出光会受到第一反光体与第二反光体的反射，使得第一光源照向第一区域的光扩散角度，由第一出光角度变成第二角度；第二光源的出光不受第一反光体与第二反光体的反射，第二光源照向第二区域的光扩散角度为该第一出光角度；其中，第二角度小于第一出光角度。The present invention further provides a backlight module, which includes a light guide plate, a circuit board, a first reflector and a second reflector. The light guide plate has a first area and a second area. The circuit board has a first light source and a second light source, the first light source and the second light source have the same first light output angle, the first light source illuminates the first area, the second light source illuminates the second area, the first light source and the first light source The distance of the area is greater than the distance between the second light source and the second area. The first reflector is arranged on the circuit board adjacent to the left side of the light emitting surface of the first light source, and is located in the light diffusion range of the first light emitting angle of the first light source. The second reflector is arranged on the circuit board adjacent to the right side of the light emitting surface of the first light source, and is located in the light diffusion range of the first light emitting angle of the first light source; wherein, part of the light emitting from the first light source will be subject to the first reflection The reflection of the body and the second light reflector makes the light diffusion angle of the first light source illuminate the first area change from the first light output angle to the second angle; the light output of the second light source is not affected by the first light reflector and the second light reflector reflection, the diffusion angle of the light illuminated by the second light source to the second area is the first light output angle; wherein, the second angle is smaller than the first light output angle.
本发明更提出一种背光模组，包括导光板、电路板、第一反光体与第二反光体。导光板具有第一区域、第二区域与破孔。电路板具有第一光源与第二光源，第一光源与第二光源具有相同的第一出光角度；第一光源照向第一区域；第二光源照向第二区域；破孔位于第一光源的第一出光角度的光扩散范围内。第一反光体设于电路板上邻近第一光源的出光面左侧的位置，且位于第一光源的第一出光角度的光扩散范围内。第二反光体设于电路板上邻近第一光源的出光面右侧的位置，且位于第一光源的第一出光角度的光扩散范围内；其中，第一光源的部分出光受到第一反光体和第二反光体的反射，使得第一光源照向第一区域的光扩散角度，由第一出光角度变成第二角度；第二光源的出光不受第一反光体和第二反光体的反射，第二光源照向第二区域的光扩散角度等于该第一出光角度；其中，第二角度小于第一出光角度。The present invention further provides a backlight module, including a light guide plate, a circuit board, a first reflector and a second reflector. The light guide plate has a first area, a second area and a perforation. The circuit board has a first light source and a second light source, the first light source and the second light source have the same first light output angle; the first light source illuminates the first area; the second light source illuminates the second area; the hole is located in the first light source within the light diffusion range of the first light exit angle. The first reflector is arranged on the circuit board adjacent to the left side of the light emitting surface of the first light source, and is located in the light diffusion range of the first light emitting angle of the first light source. The second reflector is arranged on the circuit board adjacent to the right side of the light emitting surface of the first light source, and is located in the light diffusion range of the first light emitting angle of the first light source; wherein, part of the light emitting from the first light source is received by the first light reflector and the reflection of the second light reflector, so that the light diffusion angle of the first light source to the first area changes from the first light output angle to the second angle; the light output of the second light source is not affected by the first light reflector and the second light reflector In reflection, the diffusion angle of the light illuminated by the second light source to the second area is equal to the first light output angle; wherein, the second angle is smaller than the first light output angle.
作为进一步可选的技术方案，该第一反光体包含第一电阻，该第一电阻的部分表面为反光表面，该第一电阻电性连接该第一光源，该第一反光体利用该第一电阻的反光表面进行光线反射。As a further optional technical solution, the first reflector includes a first resistor, a part of the surface of the first resistor is a reflective surface, the first resistor is electrically connected to the first light source, and the first reflector uses the first The reflective surface of the resistor reflects light.
作为进一步可选的技术方案，该第一反光体包含第一焊锡，该第一电阻通过该第一焊锡固定到该电路板上，该第一焊锡的金属表面用以反射光线。As a further optional technical solution, the first reflector includes a first solder, the first resistor is fixed to the circuit board through the first solder, and the metal surface of the first solder is used to reflect light.
作为进一步可选的技术方案，该第二反光体包含第二电阻，该第二电阻的部分表面为反光表面，该第二电阻电性连接该第二光源，该第二电阻的反光表面用来进行光线反射。As a further optional technical solution, the second reflector includes a second resistor, a part of the surface of the second resistor is a reflective surface, the second resistor is electrically connected to the second light source, and the reflective surface of the second resistor is used for Perform light reflections.
作为进一步可选的技术方案，该第二反光体包含第二焊锡，该第二电阻通过该第二焊锡固定到该电路板上，该第二焊锡的金属表面用以反射光线。As a further optional technical solution, the second reflector includes a second solder, the second resistor is fixed to the circuit board through the second solder, and the metal surface of the second solder is used to reflect light.
作为进一步可选的技术方案，该第一反光体与该第二反光体为金属块，该金属块通过表面装贴技术焊接于该电路板上。As a further optional technical solution, the first reflector and the second reflector are metal blocks, and the metal blocks are soldered to the circuit board by surface mount technology.
作为进一步可选的技术方案，该第一反光体的长边与该光扩散范围中心线的延伸交角为15至30度；该第二反光体的长边与该光扩散范围中心线的延伸交角为15至30度。As a further optional technical solution, the extension angle between the long side of the first light reflector and the centerline of the light diffusion range is 15 to 30 degrees; the extension angle between the long side of the second light reflector and the center line of the light diffusion range 15 to 30 degrees.
相较于现有技术，本发明的背光模组于第一光源对导光板第一区域的照明效果劣于第二光源对导光板第二区域的照明效果时，为第一光源设置反光体，藉以缩小第一光源对导光板的光扩散范围，俾提高导光板第一区域的发光亮度，且保持第二光源对第二区域的照明效果，而避免第一区域与第二区域两者发光亮度的差异加剧，因而，本发明背光模组中各区域的发光亮度趋于一致。Compared with the prior art, the backlight module of the present invention provides a reflector for the first light source when the lighting effect of the first light source on the first area of the light guide plate is inferior to that of the second light source on the second area of the light guide plate. In order to reduce the light diffusion range of the first light source to the light guide plate, so as to improve the luminous brightness of the first area of the light guide plate, and maintain the lighting effect of the second light source on the second area, so as to avoid the luminous brightness of both the first area and the second area Therefore, the luminous brightness of each area in the backlight module of the present invention tends to be consistent.
附图说明Description of drawings
图1为本发明背光模组一实施例的示意图。FIG. 1 is a schematic diagram of an embodiment of a backlight module of the present invention.
图2A为图1所示背光模组中载有光源的电路板的示意图。FIG. 2A is a schematic diagram of a circuit board carrying a light source in the backlight module shown in FIG. 1 .
图2B为图2A中符号A所指区域的放大图。FIG. 2B is an enlarged view of the area indicated by symbol A in FIG. 2A .
图3为本发明背光模组的第一实施态样的示意图。FIG. 3 is a schematic diagram of a first embodiment of the backlight module of the present invention.
图4为本发明背光模组的第二实施态样的示意图。FIG. 4 is a schematic diagram of a second embodiment of the backlight module of the present invention.
图5为本发明背光模组另一实施例的分解图。FIG. 5 is an exploded view of another embodiment of the backlight module of the present invention.
具体实施方式detailed description
以下内容将搭配图式，藉由具体实施例说明本发明的技术内容，本领域技术人员可由本说明书所揭示的内容轻易地了解本发明的其他优点与功效。本发明亦可藉由其它不同的具体实施例加以施行或应用。本说明书中的各项细节亦可基于不同观点与应用，在不背离本发明的精神下，进行各种修饰与变更。尤其是，于图式中各个元件的比例关系及相对位置仅具示范性用途，并非代表本发明实施的实际状况。The following content will be combined with drawings to illustrate the technical content of the present invention through specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various modifications and changes may be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. In particular, the proportions and relative positions of various elements in the drawings are for exemplary purposes only, and do not represent the actual implementation of the present invention.
本发明的背光模组可用于发光键盘中以提供背光。关于本发明的背光模组，请一并参照图1至图5，如各图所示，本发明的背光模组1包括有导光板11、电路板12、第一反光体123与第二反光体124。导光板11具有需被照明的第一区域111与第二区域112。如图5所示，电路板12具有例如为LED发光体的第一光源121与第二光源122。第一光源121用于对导光板11的第一区域111提供照明，第二光源122用于对导光板11的第二区域112提供照明。如图3所示，第一光源121原始以第一角度θ1的出光角度出光，第二光源122原始以第三角度θ3的出光角度出光，一般而言，若第一光源121与第二光源122选用相同型号或规格的LED，则第一角度θ1与第三角度θ3应该实质相同或接近。The backlight module of the present invention can be used in a luminous keyboard to provide backlight. Regarding the backlight module of the present invention, please refer to FIGS. 1 to 5 together. As shown in each figure, the backlight module 1 of the present invention includes a light guide plate 11, a circuit board 12, a first light reflector 123 and a second light reflector. Body 124. The light guide plate 11 has a first area 111 and a second area 112 to be illuminated. As shown in FIG. 5 , the circuit board 12 has a first light source 121 and a second light source 122 , such as LED illuminants. The first light source 121 is used to illuminate the first area 111 of the light guide plate 11 , and the second light source 122 is used to provide illumination to the second area 112 of the light guide plate 11 . As shown in FIG. 3 , the first light source 121 initially emits light at the first angle θ1, and the second light source 122 initially emits light at the third angle θ3. Generally speaking, if the first light source 121 and the second light source 122 If LEDs of the same model or specification are selected, the first angle θ1 and the third angle θ3 should be substantially the same or close to each other.
可选择性地，电路板12的厚度为0.14mm至0.16mm，导光板11的厚度为0.20mm至0.25mm。Optionally, the thickness of the circuit board 12 is 0.14 mm to 0.16 mm, and the thickness of the light guide plate 11 is 0.20 mm to 0.25 mm.
如图3所示，第一光源121出光面1211与第一区域111的距离D1大于第二光源122出光面1221与第二区域112的距离D2，当设定第一光源121用来照亮导光板11远处的第一区域111，而第二光源122用来照亮导光板11近处的第二区域112时，由于光线在导光板11中的传递过程中会衰减强度，且强度的衰减幅度随着传递的距离增加；因此，若第一光源121与第二光源122的各方面光学参数(例如：出光强度、出光角度)实质相同或接近时，则第一区域111的光线强度衰减幅度在理论上会大于第二区域112，换言之，第一区域111的发光亮度理论上会小于第二区域112的发光亮度。As shown in Figure 3, the distance D1 between the light emitting surface 1211 of the first light source 121 and the first area 111 is greater than the distance D2 between the light emitting surface 1221 of the second light source 122 and the second area 112, when the first light source 121 is set to illuminate the guide When the first region 111 far away from the light plate 11 is used to illuminate the second region 112 near the light guide plate 11, the intensity of the light will attenuate during the transmission process in the light guide plate 11, and the attenuation of the intensity The amplitude increases with the distance of transmission; therefore, if the optical parameters of the first light source 121 and the second light source 122 (such as: light intensity, light angle) are substantially the same or close to each other, the light intensity attenuation amplitude of the first area 111 Theoretically, it will be greater than that of the second region 112 , in other words, the luminous brightness of the first region 111 will be smaller than the luminous brightness of the second region 112 theoretically.
或者，当第一光源121对第一区域111的照明效果劣于第二光源122对第二区域112的照明效果时，如图4所示，导光板11于第一光源121第一角度θ1出光的第一光扩散范围113内形成有用于装配等作用(例如：供螺丝或卡钩贯穿)的破孔115，而会衰减第一光源121对导光板11第一区域111提供照明的光线强度，因而，即便第一光源121出光面1211与第一区域111的距离D1'小于或实质等于第二光源122出光面1221与第二区域112的距离D2'，则第一区域111的光线强度衰减程度仍可能大于第二区域112，使得第一区域111的发光亮度还是可能小于第二区域112的发光亮度。Alternatively, when the lighting effect of the first light source 121 on the first area 111 is worse than that of the second light source 122 on the second area 112, as shown in FIG. A perforated hole 115 is formed in the first light diffusion range 113 of the light guide plate 11 to attenuate the light intensity provided by the first light source 121 to provide illumination to the first region 111 of the light guide plate 11, for assembly and other functions (for example: for screws or hooks to pass through). Therefore, even if the distance D1' between the light-emitting surface 1211 of the first light source 121 and the first region 111 is less than or substantially equal to the distance D2' between the light-emitting surface 1221 of the second light source 122 and the second region 112, the degree of light intensity attenuation in the first region 111 It may still be larger than the second region 112 , so that the luminous brightness of the first region 111 may still be smaller than the luminous brightness of the second region 112 .
对此，为解决上述第一区域111与第二区域112发光亮度不一致的问题，如图2B所示，本发明电路板12邻近第一光源121的位置，设有第一反光体123与第二反光体124，第一反光体123位于第一光源121出光面1211的左侧，且分别具有反光面1231，第二反光体124位于第一光源121出光面1211的右侧，且具有反光面1241。In this regard, in order to solve the above-mentioned problem that the luminance of the first area 111 and the second area 112 are inconsistent, as shown in FIG. The reflector 124, the first reflector 123 is located on the left side of the light emitting surface 1211 of the first light source 121, and has a reflective surface 1231 respectively, and the second reflector 124 is located on the right side of the light emitting surface 1211 of the first light source 121, and has a reflective surface 1241 .
如图2B与图3所示，因而，第一光源121以第一角度θ1出光，且第一光源121的部分光线会在左、右两侧分别受到反光面1231、1241的反射，以使第一光源121出光的光扩散角度，由原先的第一角度θ1变成角度较小的第二角度θ2；亦即使第一光源121对导光板11的有效的出光角度为第二角度θ2，藉以将第一光源121的出光光线朝第一区域111集聚(亦可称为聚光)，而缩小包含第一区域111的第一光扩散范围113，以使聚光而提升第一光源121对第一区域111的照明效果，而提高第一区域111的发光亮度，进而使第一区域111与第二区域112的发光亮度趋近。As shown in FIG. 2B and FIG. 3 , therefore, the first light source 121 emits light at a first angle θ1, and part of the light from the first light source 121 will be reflected by the reflective surfaces 1231 and 1241 on the left and right sides respectively, so that the second The light diffusion angle of light output from a light source 121 is changed from the original first angle θ1 to a second angle θ2 with a smaller angle; that is, the effective light output angle of the first light source 121 to the light guide plate 11 is the second angle θ2, so that the The light emitted by the first light source 121 is concentrated toward the first area 111 (also referred to as focusing), and the first light diffusion range 113 including the first area 111 is narrowed, so that the first light source 121 can enhance the first light source 121 to the first area by focusing the light. The illumination effect of the region 111 is improved to increase the luminous brightness of the first region 111 , and then the luminous brightness of the first region 111 and the second region 112 are approached.
此外，应说明的是，第二光源122以第三角度θ3出光，在导光板11内的光扩散角度为第四角度θ4，照向导光板11内包含第二区域112的第二光扩散范围114，即对导光板11的有效的出光角度为第四角度θ4。针对光线强度衰减程度由于第二区域112小于第一区域111，因而，第二区域112的发光亮度理论上大于第一区域111的发光亮度，所以本发明的电路板12并未为第二光源122设置反光体，使得第二光源122光扩散角度的第四角度θ4实质相同或接近于第二光源122出光角度的第三角度θ3，更甚者，实质相同或接近于第一光源121出光角度的第一角度θ1，藉以避免第一区域111与第二区域112两者间发光亮度的差异增大。In addition, it should be noted that the second light source 122 emits light at a third angle θ3, the light diffusion angle in the light guide plate 11 is a fourth angle θ4, and illuminates the second light diffusion range 114 including the second region 112 in the light guide plate 11 , that is, the effective light emitting angle to the light guide plate 11 is the fourth angle θ4. Regarding the attenuation of light intensity, since the second area 112 is smaller than the first area 111, the luminance of the second area 112 is theoretically greater than the luminance of the first area 111, so the circuit board 12 of the present invention is not the second light source 122 The reflector is set so that the fourth angle θ4 of the light diffusion angle of the second light source 122 is substantially the same as or close to the third angle θ3 of the light emitting angle of the second light source 122, and what is more, is substantially the same as or close to the third angle θ3 of the light emitting angle of the first light source 121. The first angle θ1 is used to prevent the difference in luminous brightness between the first region 111 and the second region 112 from increasing.
可选择性地，第一反光体123的反光面1231与第一光源121出光面1211法线的延伸交角为5至30度，且第二反光体124的反光面1241与第一光源121出光面1211法线的延伸交角为15至30度。换言之，第一反光体123的长边跟第一光源121光扩散范围中心线的延伸交角为15至30度，且第二反光体124的长边跟第一光源121光扩散范围中心线的延伸交角为15至30度。第一反光体123、第二反光体124例如为电阻元件，因而第一反光体123、第二反光体124的数量总和跟第一、第二光源121、122的数量总和一致。Optionally, the extension angle between the reflective surface 1231 of the first reflector 123 and the normal line of the light-emitting surface 1211 of the first light source 121 is 5 to 30 degrees, and the reflective surface 1241 of the second reflector 124 and the light-emitting surface of the first light source 121 The extension angle of the 1211 normal is 15 to 30 degrees. In other words, the extension angle between the long side of the first reflector 123 and the centerline of the light diffusion range of the first light source 121 is 15 to 30 degrees, and the extension angle between the long side of the second reflector 124 and the centerline of the light diffusion range of the first light source 121 The angle of intersection is 15 to 30 degrees. The first light reflector 123 and the second light reflector 124 are, for example, resistive elements, so the sum of the numbers of the first light reflector 123 and the second light reflector 124 is the same as the sum of the numbers of the first and second light sources 121 and 122 .
较佳地，第一反光体123由第一电阻1232与第一焊锡1233所构成，第一电阻1232为表面焊接元件(surfacemountdevice)，通过第一焊锡1233而固定到电路板12上。第一电阻1232电性连接第一光源121，藉以控制流经第一光源121的电流大小，进而控制第一光源121的发光强度。一般而言，第一电阻1232除表面可能会有的反光漆料以外，与第一焊锡1233一样都具有金属材质表面，因而两者均可反射光线，而共同构成第一反光体123的反光面1231。Preferably, the first reflector 123 is composed of a first resistor 1232 and a first solder 1233 , the first resistor 1232 is a surface mount device, and is fixed on the circuit board 12 through the first solder 1233 . The first resistor 1232 is electrically connected to the first light source 121 so as to control the magnitude of the current flowing through the first light source 121 and further control the luminous intensity of the first light source 121 . Generally speaking, the first resistor 1232 has a metal surface like the first solder 1233 except for the reflective paint that may exist on the surface, so both can reflect light, and together constitute the reflective surface of the first reflector 123 1231.
较佳地，第二反光体124由第二电阻1242与第二焊锡1243所构成，第二电阻1242也是表面焊接元件，通过第二焊锡1243而固定到电路板12上。第二电阻1242电性连接第二光源122，藉以控制流经第二光源122的电流大小，进而控制第二光源122的发光强度。一般而言，第二电阻1242除表面可能会有的反光漆料以外，与第二焊锡1243一样都具有金属材质表面，因而两者均可反射光线，而共同构成第二反光体124的反光面1241。Preferably, the second reflector 124 is composed of a second resistor 1242 and a second solder 1243 , the second resistor 1242 is also a surface soldering component, and is fixed on the circuit board 12 through the second solder 1243 . The second resistor 1242 is electrically connected to the second light source 122 so as to control the magnitude of the current flowing through the second light source 122 and further control the luminous intensity of the second light source 122 . Generally speaking, the second resistor 1242 has a metal surface like the second solder 1243 except for the reflective paint that may exist on the surface, so both can reflect light, and together constitute the reflective surface of the second reflector 124 1241.
在上述较佳实施例中，第一电阻1232、第一焊锡1233、第二电阻1242与第二焊锡1243均为背光模组中有设置光源的电路板的必要元件，仅改变第一电阻1232、第二电阻1242在电路板上的位置，就能提高第一区域111的发光亮度，以使第一区域111与第二区域112的发光亮度趋近。因此，本发明毋需额外增设元件，也毋需在导光板上增设破孔，而在不降低导光板导光效率的情况下，达成本发明的功效。In the above preferred embodiment, the first resistor 1232, the first solder 1233, the second resistor 1242 and the second solder 1243 are all necessary components of the circuit board with the light source in the backlight module, only the first resistor 1232, The position of the second resistor 1242 on the circuit board can increase the luminous brightness of the first region 111 , so that the luminous brightness of the first region 111 and the second region 112 can approach. Therefore, the present invention does not need to add additional components, and does not need to add holes on the light guide plate, and achieves the effect of the present invention without reducing the light guide efficiency of the light guide plate.
可选择性地，当要提高导光板特定区域发光亮度，所需要的反光体数目超过电路板上串接光源的电阻数目时，可另外在电路板上增设非属于电阻元件的金属块等块状反光体，以利用增设的块状反射体表面的反光特性达成聚光的效果，使导光板各区域的发光亮度趋于一致。Optionally, when it is necessary to increase the luminous brightness of a specific area of the light guide plate, and the number of reflectors required exceeds the number of resistances of the light source connected in series on the circuit board, a metal block such as a non-resistive element can be additionally added on the circuit board. The light reflector uses the reflective properties of the surface of the added block reflector to achieve the effect of concentrating light, so that the luminance of each area of the light guide plate tends to be consistent.
举例而言，电路板上原先设有8颗LED光源，以及与前述8颗LED光源串接的8颗电阻，其中有5颗LED光源对导光板的照明区域光度较弱，需要聚光而提高发光亮度，如此，5颗LED光源左右两侧至少均需设置1个反光体，5颗LED光源总共需要10个反光体，因此，扣除原先串接可作为反光体的8颗电阻外，尚须要额外增设2颗反光体，对此，可透过表面装贴技术(SurfaceMountTechnology，简称SMT)，于电路板12上额外焊接2个具有金属材质表面的块状反光体，所述块状反光体可为金属块。For example, there were originally 8 LED light sources on the circuit board, and 8 resistors connected in series with the above-mentioned 8 LED light sources. Among them, 5 LED light sources have weak luminosity to the illumination area of the light guide plate, and need to be concentrated to improve Luminous brightness, in this way, at least one reflector needs to be installed on the left and right sides of the 5 LED light sources, and a total of 10 reflectors are required for 5 LED light sources. Two additional reflectors are added. For this, two additional block reflectors with metal surfaces can be welded on the circuit board 12 through Surface Mount Technology (SMT). The block reflectors can be for metal blocks.
综上所述，本发明的背光模组用于发光键盘，于第一光源的第一光扩散范围内设置反光体，可使第一光源对导光板的出光光线朝发光亮度低的第一区域集聚，使聚光而提升第一光源对第一区域的照明效果，而提高第一区域的发光亮度。另外，保持第二光源对第二区域的照明效果，而避免第一区域与第二区域两者发光亮度的差异加剧，藉以解决背光模组中不同区域的发光亮度不一致的问题，以提升发光键盘的整体发光效果的均匀度。To sum up, the backlight module of the present invention is used for a light-emitting keyboard, and a reflector is provided in the first light diffusion range of the first light source, so that the light emitted by the first light source to the light guide plate can be directed toward the first area with low luminance Gathering is to concentrate the light to improve the lighting effect of the first light source on the first area, so as to increase the luminous brightness of the first area. In addition, the lighting effect of the second light source on the second area is maintained, and the difference in luminous brightness between the first area and the second area is avoided from aggravating, so as to solve the problem of inconsistent luminous brightness of different areas in the backlight module, so as to improve the luminous keyboard The uniformity of the overall luminous effect.
上述实施例仅例示性说明本发明的原理及功效，而非用于限制本发明。本领域技术人员均可在不违背本发明的精神及范畴下，对上述实施例进行修饰与改变。因此，本发明的权利保护范围，应如本发明申请权利要求书所列。The above-mentioned embodiments are only illustrative to illustrate the principles and functions of the present invention, and are not intended to limit the present invention. Those skilled in the art can modify and change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be as listed in the claims of the present application.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510282725.9ACN105042404B (en) | 2015-05-28 | 2015-05-28 | Backlight module |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510282725.9ACN105042404B (en) | 2015-05-28 | 2015-05-28 | Backlight module |
| Publication Number | Publication Date |
|---|---|
| CN105042404A CN105042404A (en) | 2015-11-11 |
| CN105042404Btrue CN105042404B (en) | 2016-03-30 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510282725.9AActiveCN105042404B (en) | 2015-05-28 | 2015-05-28 | Backlight module |
| Country | Link |
|---|---|
| CN (1) | CN105042404B (en) |
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| CN201044219Y (en)* | 2006-10-27 | 2008-04-02 | 光宝科技股份有限公司 | Light guide plate for key |
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| TW201409513A (en)* | 2012-08-27 | 2014-03-01 | Zippy Tech Corp | Illumination key board with light guide structure |
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| CN105042404A (en) | 2015-11-11 |
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