Display panel

A display panel and image display technology, which is applied in the direction of instruments, printed circuits connected with non-printed electrical components, electrical components, etc., can solve the problem of increased resistance of wiring lines 10, difficulty in using power lines, and failure of semiconductor integrated circuits and other issues to achieve the effect of easy installation and cost reduction

Inactive Publication Date: 2004-07-07
TOSHIBA MATSUSHITA DISPLAY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] When manufacturing an active liquid crystal panel, since the film thickness of wires such as scanning lines and signal lines is about 0.5 μm, the resistance value of the wires cannot be sufficiently reduced, and the resistance of the wiring lines 10 is affected by the shape (the length of the wiring pattern / width ratio) increases, and enough current cannot pass through the main wiring line 10 alone.
More specifically, for example, by using an aluminum film with a wiring material thickness of about 0.3 µm, if 0.1 Ω / cm 2 The surface resistance of the wiring line is as high as 500Ω in the case of a wiring width of 50 μm and a wiring length of 25 cm, and thus it is difficult to use in a power supply line of mA unit or higher
[0027] Similarly, in the input signal and clock lines, such wiring resistance is added to the input resistance of the semiconductor integrated circuit, and in the case of high-speed signal transmission (more than several hundred kHz), the signal waveform is rounded, and the semiconductor integrated circuit may not work

Method used

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Experimental program
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Effect test

Embodiment 1

[0050] As shown in FIGS. 1A and 1B, an active substrate 2 includes a terminal electrode 5a, a wiring line 7a for connecting the terminal electrode 5a to a signal line, and a wiring line 7a for connecting the terminal electrode 5b. , 5c wiring line 7b.

[0051]Preferably, these terminal electrodes 5a, 5b, 5c and wiring lines 7a, 7b should be formed at the same time.

[0052] An insulating layer 26 includes a gate insulating layer, a passivation (passivation) insulating layer, and other insulating layers formed on the main surface of the active substrate 2, and selectively removes the upper surfaces of the terminal electrodes 5a, 5b, 5c The upper insulating layer, while exposing the surface of each electrode.

[0053] At the mounting surface side of the driver IC chip 3a electrically connected to the terminal electrodes 5a, 5b, a bump electrode 24 electrically connected to the terminal electrodes 5a, 5b is formed.

[0054] In the printed circuit 13 that is electrically connect...

Embodiment 2

[0066] Embodiment 1 above employs the printed circuit board 13 in which the openings 14a, 14b are formed at positions corresponding to the mounting positions of the driver integrated circuit chips 3a, 3b. In Embodiment 2, it is intended to use a printed circuit board 13 having a deep recess 15 larger than the outline of the driver integrated circuit chips 3a, 3b while covering the driver integrated circuit chips 3a, 3b mounted on the active substrate 2. 3b's upper surface. This embodiment has the same effect as Embodiment 1.

[0067] Also in this embodiment, in the same manner as in Embodiment 1, it is not necessary to use a conventional long bus flexible film, and the cost is reduced. However, in Embodiment 1, the thick wiring lines 22 , 23 formed on both sides of the printed circuit board 13 have limitations in circuit design in order to narrow the line width or reduce the number of lines near the opening 14 . However, the printed circuit board 13 in Embodiment 2 is exempt...

Embodiment 3

[0070] Fig. 3 explains Embodiment 3 of the present invention.

[0071] Fig. 3A is a perspective view of a liquid crystal panel, Fig. 3B is a substantially enlarged view thereof, and Fig. 3C shows a connecting film for joining split circuit boards together.

[0072] Embodiments 1 and 2 above present the L-shaped or π-shaped printed circuit board 13 integrating a printed circuit board connected to the connection terminals of the scanning lines and a printed circuit board connected to the connection terminals of the signal lines. Even when such a printed circuit board 13 is used, in a small-sized liquid crystal panel of size 3 (diagonal 7.5 cm) or smaller, when the printed circuit board 13 is mounted, due to a temperature rise between the printed circuit board 13 and the active The expansion difference between the substrates 2 is also small, and the material cost and processing cost of the printed circuit board 13 are small and hardly problematic.

[0073] However, in general, a...

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Abstract

A display panel capable of supplying necessary signals and a power supply, at a low resistance, to a semiconductor integrated circuit chip mounted on the display panel, wherein a supply of electric signals to the terminal electrodes of scanning lines and signal lines is performed by mounting a driving integrated circuit chip directly on the terminal electrodes disposed on an active substrate, and a connection of electricity to the driving integrated circuit chip is performed by mounting a printed circuit board, in which an opening part larger in outside diameter than the integrated circuit chip and a wiring path are formed at and around the mounting position of the driving integrated circuit chip which is mounted on the active substrate at portions outside the image display area.

Description

technical field [0001] The present invention relates to a display panel with image display function and a printed circuit board mounted on the display panel. Background technique [0002] Liquid crystal panels capable of displaying various images (such as satisfactorily displaying television images with a diagonal of 5 to 50 cm) are commercially presented due to recent advances in ultrafine processing technology, liquid crystal material technology, and mounting technology. [0003] In addition, color display can be easily realized by forming RGB coloring layers in one of the two glass substrates constituting the liquid crystal panel. [0004] In particular, in a so-called active type liquid crystal panel including a switching element in each pixel, a high-contrast image is obtained with high-speed response and less crosstalk. [0005] Such a liquid crystal panel is generally composed of a matrix including 100 to 1000 scanning lines and 200 to 2000 signal lines, and is relat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09F9/00G02F1/13G02F1/1345H05K1/14H05K1/18H05K3/36
CPCG02F1/13452H05K1/142H05K1/182H05K3/368G02F1/133
Inventor 川崎清弘
Owner TOSHIBA MATSUSHITA DISPLAY TECH
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