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A technology for display devices and active components, applied in static indicators, nonlinear optics, instruments, etc., can solve the problems of increased number of steps, non-uniformity, and increased manufacturing costs, so as to reduce the number, reduce manufacturing costs, and improve The effect of reliability

Inactive Publication Date: 2006-10-18
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, when the number of driver ICs used in a liquid crystal display device increases, there is a problem that the manufacturing cost increases.
That is, since the unit price of the driver IC is relatively high and the number of steps for connecting the driver IC to the terminals increases, the manufacturing cost increases.
In addition, if the number of driver ICs used in a liquid crystal display device increases, power consumption increases
In addition, as the number of driver ICs increases, the number of components of the liquid crystal display device increases.
Therefore, unless a driver IC with a lower failure rate is not used, the reliability of the liquid crystal display device will decrease.
[0008] In addition, even for driver ICs with the same specifications, the output may vary from product to product
Therefore, if the number of driver ICs is increased, there is a problem of poor display (band-shaped unevenness) caused by differences in the output of the driven ICs.

Method used

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Embodiment approach 1

[0017] figure 1 The circuit configuration of the liquid crystal display device of this embodiment is shown. figure 1 The source driver IC (circuit) 3 is connected to the source wiring 2 provided on the liquid crystal panel 1 . and, figure 1 In the figure, active elements or pixels in the liquid crystal panel 1 are not shown, and only one gate wiring 4 is shown, and a gate driver IC (circuit) is also not shown.

[0018] However, active elements and pixels are arranged in a matrix in the liquid crystal panel 1 . And, a gate pulse from the gate driver IC is supplied to each active element through the gate wiring 4, thereby driving the active element. When driving an active element, the source signal of the source driver IC3 is written to the pixel from the source wiring 2 connected to the active element. By writing a source signal to a pixel, a predetermined voltage is applied to the pixel, and a desired image is displayed.

[0019] Furthermore, in the liquid crystal device ...

Embodiment approach 2

[0032] Then, figure 2 The circuit configuration of the liquid crystal display device of this embodiment is shown. figure 2 The liquid crystal display device shown is basically the same as figure 1 The illustrated liquid crystal display devices are the same, but differ in that a buffer 7 is provided instead of a memory circuit 6 . and, in figure 2 shown in the liquid crystal display device, for the figure 1 Parts having the same structure in the illustrated liquid crystal display devices are denoted by the same symbols, and detailed description thereof will be omitted.

[0033] The buffer 7 is connected in series to the source wiring 2 and the switch circuit 5 , and holds the source signal supplied to each source wiring 2 from the source driver IC 3 for a predetermined time for each source wiring 2 . figure 2 In the figure, the buffer 7 is provided in each switch group unit. Specifically, the buffer 7a is provided for the switch group 5a, and the buffer 7b is provided ...

Embodiment approach 3

[0042] Then, image 3 The circuit configuration of the liquid crystal display device of this embodiment is shown. image 3 The liquid crystal display device shown is basically the same as figure 1 The illustrated liquid crystal display devices are the same, but differ in that the memory circuit 6 is not provided, and the switching circuit 5 and the source wiring 2 are directly connected. and, image 3 shown in the liquid crystal display device, for the figure 1 The same components of the liquid crystal display devices shown are denoted by the same symbols, and detailed description thereof will be omitted.

[0043] Then, based on image 3 The operation of the liquid crystal display device of this embodiment will be described. First, although not shown, n pieces of data are input from the control circuit to the source driver IC3 (the number of outputs is n). The source driver IC 3 generates n source signals based on the input data, and supplies them to the switch circuit 5...

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Abstract

A display has active elements and pixels arrayed in a matrix and drives the active elements to apply a voltage to the pixels for displaying an image. The display includes a gate driver IC for generating a signal for controlling the active elements, a plurality of gate interconnect lines for supplying the signal to the active elements, a source driver IC for generating a voltage to be applied to the pixels, a plurality of source interconnect lines for supplying the voltage to the pixels, and a switching circuit provided between the source driver IC and the plurality of source interconnect lines and having individually-switchable groups for supplying the voltage generated by the source driver IC to all of the source interconnect lines.

Description

technical field [0001] The present invention relates to a display device, in particular to a display device having active elements and pixels arranged in a matrix. Background technique [0002] In recent years, liquid crystal display devices with features such as thin profile and low power consumption have been attracting attention. This liquid crystal display device is generally classified into an active type and a passive type, but the active type is superior in terms of size and high definition. In an active liquid crystal display device (hereinafter simply referred to as a liquid crystal display device), active elements and pixels are arranged in a matrix, each active element is driven, and a predetermined voltage is applied to the pixels to control the alignment of liquid crystals. Active elements in general liquid crystal display devices often use TFTs (Thin Film Transistor: thin film transistors). [0003] In addition, in a liquid crystal display device, in order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G02F1/133G09G3/20
CPCG09G3/3677G09G3/3688G09G2310/0297G02F1/133
Inventor 宫冈明敏
Owner MITSUBISHI ELECTRIC CORP
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