JPS60114822A - Production of liquid crystal display panel - Google Patents

Abstract

PURPOSE:To reduce an adhering error and to shorten an adhering time by using the transmitting and reflecting characteristics due to the difference of the wavelength of laser light to detect the position of a display pattern. CONSTITUTION:Positioning patterns 5, 6 are formed on an upper panel 1 and a lower panel 2 and a bonding agent 7 to adhere both the panels 1, 2 is applied to the peripheral part of the lower panel 2. When the panels 1, 2 before adhesion are arranged between a laser light oscillator 3 and a detector 4 and relative motion along the opposite surface is applied to the panels 1, 2 by X and Y tables or the like, laser light 8 oscillated from the laser light oscillator 3 and irradiating the lower panel 2 vertically is turned to light 9 attenuated most sharply when both the positioning patterns 5, 6 are correctly opposed and the light 9 is detected by a detector 4. Thus, both the panels 1, 2 can be positioned easily and highly accurately in accordance with the change of the laser output and precise panel adhesion can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a liquid crystal display panel constructed by laminating two panels together, and in particular to a liquid crystal display that can reduce the error in lamination by nine hours in the process of laminating panels. This invention relates to a method for manufacturing a panel.

Conventional technology and problems Conventionally, when pasting panels together, the panels were positioned based on the corner of the panel and then buttered (display pattern forming area, etc.), but when the precision of the edge surface of the panel was not good. 64) Since the pattern on each panel is not necessarily formed correctly at a predetermined distance from the reference surface, check the alignment pattern included in the display pattern for each panel using a microscope. Panels had to be pasted together, which was inefficient.

Confession of the Invention The present invention is intended to solve the above-mentioned problems, and aims to provide an efficient method for manufacturing a liquid crystal panel that can reduce lamination errors and shorten lamination time. .

DESCRIPTION OF THE INVENTION According to the present invention, the entire position of a display pattern is detected by utilizing the transmission and reflection characteristics due to the different wavelengths of laser light, thereby making it possible to reliably align the panel.

Examples of the invention Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a detailed explanatory diagram of the present invention, in which 1 and 2 are upper and lower panels comprising a liquid crystal display spring 41, 3 is a laser beam oscillator, and 4 is a detector opposite to the laser beam oscillator 3. There is a vessel. Positioning patterns 5 and 6 are formed on the upper panel 1 and the lower panel 2, and the lower panel 20
Adhesive material 7 for bonding both panels 1 and 2 is applied to the periphery. Note that although the positioning patterns 5 and 6 are shown large in the drawing (c), in reality each side is several tens of microns long.
The degree of damage is minute.

Now, the panels 1 and 2 before bonding are interposed between the laser beam oscillator 6 and the detector 4 as shown in the figure, and
When relative movement wJ is applied to the panel panels 1 and 2 along the opposing surfaces, the laser beam 8 emitted from the laser beam oscillator 3 and vertically irradiating the lower panel 2 will cause both positioning patterns 5 and 6 to When facing directly, the light 9 becomes the most attenuated and is detected by the detector 4. Therefore,
By changing the laser output, both panels can be easily and precisely positioned to perform accurate panel bonding.

Fig. 2 is a detailed schematic diagram of the configuration that realizes this operating principle, where 3' is the main body of the laser oscillator, such as a semiconductor laser, which branches each laser beam oscillator 3, and 4' is the main body of the laser oscillator, such as a semiconductor laser, which branches out each laser beam oscillator 3. The sensor is used for monitoring. Note that the detection unit 4'
If a buzzer, lamp, etc. are provided in the positioning pattern, and the light is turned on when both positioning patterns face each other, the positioning work will be made easier.

Effects of the Invention As described above, the present invention has excellent effects in that it is possible to easily and accurately position panels, reduce errors in lamination, and shorten working time.

[Brief explanation of drawings]

The drawings show an embodiment of the method for manufacturing a liquid crystal panel according to the present invention. Fig. 1 is an explanatory diagram of the principle of operation, and Fig. 2 is a schematic diagram of the configuration of an apparatus implementing the present invention. In the figure, 1 indicates the upper panel. ,
2 is the lower panel, 3 is the laser beam oscillator, 3' is the laser oscillator body, 4 is the detector, 4' is the detection part, 5.6 is the positioning pattern, 7 is the adhesive, 8 is the laser that irradiates the panel vertically It is light. Patent applicant Fujitsu Ltd. Representative Patent Attorney Gobe Tamamushi (1 other person) Figure 1 Figure 2

Claims (1)

[Claims] In a panel bonding process for a liquid crystal display panel configured by bonding two panels each having a positioning pattern, the panel is vertically irradiated with laser light, and the laser light passes through the positioning pattern forming section. 1. A method of manufacturing a liquid crystal display panel, characterized in that the position of the panel is detected based on a change in output.