JPH01232382A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To make the above device thin in thickness and small in size by folding a read pattern on a tape in the entirety of the tape to the back surface side of a circuit board. CONSTITUTION:The output side end part of the read pattern on the tape carrier system tape 1 packaging an LSI chip for driving a liquid crystal display element 2 is connected to the external connecting terminal of the element 2. At the end part of the circuit board 3 arranged close to the external connecting terminal of the element 2 which is apart from the element 2, the input end part side of the read pattern of the tape 1 is folded along the circuit board 3 in the entirety of the tape 1 to the back surface of the board 3 and connected to the terminal of the board 3 side. Thus, the driving circuit of the element 2 can be thinned and an overhanging width from the element 2 is kept narrow, so that the device can be miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display device in which the mounting method of a driving LSI chip is improved to reduce the area of parts other than the liquid crystal display element and to make the whole thinner. .

[Prior Art] Conventionally, as disclosed in Japanese Utility Model Application No. 61-155880, an LSI chip was mounted by connecting it to a lead pattern on a tape using a tape carrier method, and then it was expanded flat as it was. However, the problem is that the former makes the width from the liquid crystal display element wider, and the latter makes the liquid crystal display thicker. was there.

[Problems to be Solved by the Invention] The present invention solves the above-mentioned problems, and while incorporating an LSI for active use of a liquid crystal display element, the width is not too wide compared to the liquid crystal display element itself, and the thickness is also small. It is an object of the present invention to provide a liquid crystal display device that is not much different from the liquid crystal display element itself.

[Means for Solving the Problems] In order to solve the above problems, in the present invention, the output end of a lead pattern on a tape carrier type tape mounting an LSI chip that moves a liquid crystal display element is connected to a liquid crystal display element. The input end side of the lead pattern on the tape is the end of the circuit board located close to the external connection terminal of the liquid crystal display element, which is located away from the liquid crystal display element.
I decided to bend the entire tape along the circuit board, pass it to the back of the circuit board, and connect it to the terminal on the circuit board side there.

[Effects] By taking the above measures, the width of a liquid crystal display element only needs to be approximately the same as the size of an LSI chip, and the thickness is approximately the same as that of a liquid crystal display element. A thin liquid crystal display device can be obtained.

[Example] FIG. 1 is a diagram showing an example of the present invention. 1 is a tape carrier type tape on which an LSI chip is mounted, 2 is a liquid crystal display element, 3 is a hard circuit board, and 4 is for connecting the output terminal of the liquid crystal display element and the output terminal of the lead pattern on the tape carrier type tape. The anisotropic conductive sheet used, 5, is a solder connection that connects the input side end of a lead pattern on a tape whose end on the side away from the liquid crystal display element of the circuit board is bent along the circuit board to the terminal on the circuit board side. Department.

In this way, the lead pattern on the tape is
Since the circuit board was bent toward the back side, the liquid crystal display element drive circuit could be made thin and the width of the overhang from the liquid crystal display element could be kept narrow.

[Effects of the Invention] As described above, according to the present invention, a thin liquid crystal display device with a built-in liquid crystal display element drive circuit and less protrusion from the liquid crystal display element can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention. 1...Tape carrier type tape with LSI chip mounted, 2...Liquid crystal display element, 3...Circuit board, 4...Output terminal of liquid crystal display element and output terminal of tape carrier side lead pattern an anisotropic conductive sheet to be connected; 5... a solder connection part that connects the input side end of the tape side lead pattern bent at the end of the circuit board to the circuit board side terminal;

Claims (1)

[Claims] 1. Tape carrier method on which an LSI chip for driving a liquid crystal display element is mounted Connect the output side end of the lead pattern on the tape to the external connection terminal of the liquid crystal display element, and the input end side of the lead pattern on the tape: At the end of the circuit board located close to the external connection terminal of the liquid crystal display element, on the side away from the liquid crystal display element, bend the tape along with the circuit board and pass it to the back of the circuit board, where it is connected to the terminal on the circuit board side. A liquid crystal display device characterized by: