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Backlight module accurate light guide thin film core production method

A technology of backlight module and manufacturing method, which is applied in the direction of light guide, optics, laser, etc., can solve the problems of high technical requirements and great difficulty, and achieve the effects of high-efficiency light guide structure, process efficiency improvement, and precise structure

Active Publication Date: 2010-06-02
YANCHENG NICROTEK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mask design and manufacture of precision light guide plate mold cores require quite high technical requirements, especially in the production of large-format light guide plates.

Method used

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  • Backlight module accurate light guide thin film core production method
  • Backlight module accurate light guide thin film core production method
  • Backlight module accurate light guide thin film core production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1: see attached figure 2 As shown, a semiconductor-pumped solid-state laser (DPSSL) 1 is used, with ultraviolet light output (frequency tripled 351nm / 355nm), single pulse energy > 100uJ; On the mirror (DMD) 3, through the projection optical imaging system 4, the image input on the DMD is reduced, and the reduced magnification depends on the focal length ratio of the objective lens and the microscope; the reduced image is imaged on the back focal plane of the microscope. On the diaphragm 5, the function of the diaphragm is to block part of the stray light, which is controlled by the diaphragm controller 6; The photoresist dry plate 8 is set on the x-y precision work platform 9, and is controlled by the precision drive controller 10 to perform translational movement in the X-Y plane. The entire system is controlled and operated by the computer 11 .

[0046] The lens materials in the above laser etching system are all made of fused silica glass; the reflector is...

Embodiment 2

[0056] Embodiment 2: A semiconductor-pumped solid-state laser (DPSSL) is used, with ultraviolet light output (frequency tripled 351nm / 355nm), and single pulse energy>100uJ. The laser beam emitted from the laser goes through the beam expansion and collimation optical path, and illuminates on the digital micro-mirror (DMD). Through the projection optical system, the input pattern on the DMD is reduced. The reduction ratio depends on the focal length ratio of the objective lens and the microscope. The reduced image is imaged on the diaphragm of the back focal plane of the microscope, the function of the diaphragm is to block part of the stray light. Then, the small pattern near the diaphragm is imaged on the SU-8 photoresist dry plate through the 4F lens group. The shape of the light spot or the light intensity distribution in the light spot can be changed by changing the shape of the graphics input on the DMD and the difference in gray level, so that the dots with different surf...

Embodiment 3

[0057] Embodiment 3: Take the production of the light guide plate of the mobile phone display screen as an example, see the attached Figure 5 , the process steps of making the light guide plate (film) mold core of the present invention are described in detail. (1) Design and determine the light guide structure area according to the application requirements, draw the pattern, use the network point design software to design the network point distribution of the light guide area according to the characteristics of the light source, and use the optical simulation software to evaluate the brightness and uniformity of the designed network point. do further optimization. Determine parameters such as dot size and depth. (2) Convert the designed dot distribution and dot parameters into controllable files of laser etching equipment. (3) Adjust the optical path of the laser etching equipment, set the corresponding parameters, and perform etching on the SU-8 dry plate. (4) Carry out d...

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Abstract

The invention discloses a method for manufacturing a precise photoconductive film cavity of backlight modules, which is characterized in that: an ultraviolet laser beam is reflected on a digital micromirror after being expanded and collimated, the digital micro mirror is controlled according to the shape of a light guide network to be produced, and reflected light etches the light guide network on the surface of an ultraviolet photoresist dry plate via a projection optical system with 4F light paths; the relative positions of the reflected light and the photoresist dry plate are changed in turn to complete the etching of each needed light guide network; and the etched photoresist dry plate is electroformed after the process of surface metallization, so as to obtain the needed light guidefilm cavity. By inputting the shape of the light guide network via the digital micro mirror and etching the light guide network on the photoresist dry plate directly via the ultraviolet laser, the invention can evaluate the network design and provide sample products in a rapid manner, and improve the manufacturing quality of the cavity; at the same time, the invention is propitious to the manufacture of large-sized light guide plates.

Description

technical field [0001] The invention relates to a method for manufacturing a mold core for a light guide plate or a light guide film of a liquid crystal backlight module, and realizes a light guide plate (light guide film) mold core with high precision, controllable depth and dot size; The kernel structure is suitable for the manufacture of light guide plates (light guide films) in LCD displays and large-area backlight modules. Background technique [0002] In recent years, the application of liquid crystal displays (LCDs) has become more and more extensive, and a large area has become its development trend. The LCD itself does not emit light, therefore, the backlight module becomes a necessary component to provide its light emission. The main structure of the backlight module is as follows: a light source, a light guide plate, a diffuser, a prism sheet, and a reflector. Among them, the light guide plate converts the CCFL line light source or LED point light source into a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/00G02B6/00G03F7/00G03F5/02
Inventor 陈林森
Owner YANCHENG NICROTEK CO LTD
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