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Manufacturing method of area light source device, area light source device, displaying device, and electronic device

A manufacturing method and surface light source technology, applied to electric light sources, mechanical equipment, lighting devices, etc., can solve the problems of difficulty in adjusting the position of the light guide plate 20, difficulty in manufacturing a high-brightness surface light source device, and inability to adjust the position of the light guide plate 20 , to achieve the effect of easy and cheap fabrication

Inactive Publication Date: 2015-10-28
TOHOKU DENSHI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Since the substrate assembly 10 (FPC11) is long and thin, it is extremely difficult to adjust the position of the light guide plate 20 relative to the substrate assembly 10 during the above work.
Moreover, once the double-sided tape on the substrate assembly 10 contacts the light guide plate 20, it is almost impossible to adjust the position of the light guide plate 20.
Therefore, for the conventional surface light source device using double-sided tape for fixing the light guide plate 20 to the substrate assembly 10, it is difficult to manufacture a high-brightness surface light source device (a surface light source device whose luminance is close to the design value). extremely difficult

Method used

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  • Manufacturing method of area light source device, area light source device, displaying device, and electronic device
  • Manufacturing method of area light source device, area light source device, displaying device, and electronic device
  • Manufacturing method of area light source device, area light source device, displaying device, and electronic device

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no. 1 Embodiment approach

[0051] Figure 4 The manufacturing process of the surface light source device based on the manufacturing method of the surface light source device which concerns on 1st Embodiment of this invention is shown.

[0052] A surface light source device manufactured using the method for manufacturing a surface light source device according to this embodiment (hereinafter referred to as the surface light source device according to the first embodiment / this embodiment) has the same substrate assembly 10 and light guide plate 20 as components described above. installation.

[0053] That is, the substrate assembly 10 of the surface light source device of the first embodiment (see Figure 4 (A)) is manufactured in such a way that the front end of the FPC11 is left with a front end side vacancy not used for the installation of the LED (side-emitting type LED) 15, and the end of the rear side of the FPC11 is reserved with a Rear end side margin not used for mounting of LED 15 . In additi...

no. 2 Embodiment approach

[0072] Hereinafter, the manufacturing method of the surface light source device according to the second embodiment of the present invention will be described focusing on the differences from the manufacturing method of the surface light source device according to the first embodiment.

[0073] In the method of manufacturing the surface light source device according to the first embodiment, as described above, the height of the lower surface of the light guide plate 20 relative to the FPC 11 is controlled by the application amount of the photocurable resin 40 . Therefore, in the method of manufacturing the surface light source device according to the first embodiment, there may be cases where the lower surface of the light guide plate 20 of the manufactured surface light source device is less than that of the FPC 11 due to an error in the amount of application of the photocurable resin 40 . The height of (hereinafter referred to as the height of the light incident portion) is sh...

no. 3 Embodiment approach

[0078] Hereinafter, the manufacturing method of the surface light source device according to the third embodiment of the present invention will be described focusing on the differences from the manufacturing method of the surface light source device according to the first embodiment.

[0079] When manufacturing a surface light source device using the method for manufacturing a surface light source device according to this embodiment, prepare a substrate assembly 10 in which Figure 7 The schematically shown LED 15 is an LED 15 having planar portions 15 b that are more concave than the light emitting surface 15 a on both sides of the light emitting surface 15 a.

[0080] In addition, the cross-sectional shape of the end portion on the fixed side (the end portion on the incident surface 20a side) is also prepared as follows: Figure 8 The cross-sectional shape of the light guide plate 20 is shown.

[0081] Specifically, the Figure 8The dashed-line frame 15 d shown is the boun...

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Abstract

The invention provides a manufacturing method of an area light source device, the area light source device, a displaying device, and an electronic device. The high-brightness high-performance area light source device and displaying device can be easily and cheaply manufactured. The area light source device comprises: a substrate assembly enabling a plurality of light sources to be arranged on a printing substrate; and a light guiding board enabling light irradiated to an incident plant to be irradiated from an exit plane. The light guiding board and the substrate assembly are fixed in order to allow light irradiated from a light-emitting plane of each light source of the substrate assembly to be irradiated to the incident plane. The manufacturing method of the area light source device comprises: a process of coating, that is, coating a light-cured resin on any one of the substrate assembly and the light guiding board; a process of adjustment, that is, adjusting the position between the substrate assembly and the light guiding board with the light-cured resin existing between the substrate assembly and the light guiding board; and a process of fixation, that is, after the position between the substrate assembly and the light guiding board is adjusted, enabling the light-cured resin to be cured or be adhered by irradiation of light with a specific wave length in order to fix the substrate assembly and the light guiding board.

Description

technical field [0001] The invention relates to a manufacturing method of a surface light source device, a surface light source device, a display device and electronic equipment. Background technique [0002] As a surface light source device, it is known to have figure 1 The structures shown in (A) and (B) are surface light source devices with a structure in which the substrate assembly 10 and the light guide plate 20 are fixed with a comb-shaped double-sided tape 30 . [0003] The light guide plate 20 diffusely reflects the light incident on the incident surface 20a inside and transmits it from the outgoing surface 20b ( figure 1 The lower surface of the middle) emits the device. [0004] Such as figure 1 As shown in (A), the board assembly 10 is mounted on the FPC 11 in a row with a plurality of side-emission LEDs 15 (hereinafter simply referred to as LEDs (Light Emitting Diodes) 15 ) with the light-emitting surfaces 15 a facing the same direction. (Flexible Printed Ci...

Claims

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Application Information

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IPC IPC(8): F21S8/00F21V8/00G02F1/13357
CPCG02B6/0091G02F1/133615
Inventor 井尻和宏
Owner TOHOKU DENSHI CO LTD