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Two-dimensional display

A flat-panel display, voltage converter technology, applied in static indicators, instruments, identification devices, etc., can solve the problems of increasing circuit complexity, circuit complexity, poor circuit characteristics, etc.

Active Publication Date: 2005-04-27
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor characteristics of the circuit implemented by the LTPS process, the formed DC-to-DC voltage converter 112 using the charge pump has relatively poor efficiency and current supply capability.
In order to improve the ability to provide current, sometimes it is even necessary to use a more complex pulse width modulation (Pulse Width Modulation, PWM) DC-to-DC voltage converter, which increases the complexity of the circuit
In addition, to achieve three times the voltage conversion, the required circuit is more complicated, which will deteriorate the yield rate of the entire LTPS display panel and increase the manufacturing cost

Method used

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Embodiment Construction

[0012] Please refer to FIG. 2 , which is a structural block diagram of a liquid crystal display of a mobile phone according to a preferred embodiment of the present invention. The LCD 200 is, for example, a small LTPS LCD for a mobile phone, which includes an integrated circuit 210 , a substrate 220 , a second DC-DC voltage converter 222 , a gate driver 224 , a data driver 226 and a pixel matrix 228 . The integrated circuit 210 includes a first DC-to-DC voltage converter 212 , a source driver 216 and a common voltage (Vcom) driver 218 . The voltage converter 212 is used to convert the system voltage Vcc (approximately 2.7V-3V) into a first output voltage Vs1, such as 5V, to provide required operations for components such as the source driver 216 and the Vcom driver 218 in the integrated circuit 210 Voltage.

[0013] In addition, the second DC-to-DC voltage converter 222 , the gate driver 224 , the data driver 226 and the pixel matrix 228 are formed on the substrate 220 . The...

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Abstract

The planar display includes base board, pixel matrix, the first DC / DC converter and the second DC / DC converter. The pixel matrix is formed on the base board. The first DC / DC converter is located inside the integrated circuit to provide the integrated circuit with required power sources while outputting one output voltage. The second DC / DC converter is formed on the base board and connected to the first DC / DC converter for converting the output voltage into the operation voltage for the grid driver.

Description

technical field [0001] The present invention relates to a flat-panel display, and in particular to a flat-panel display in which a part of the voltage converting circuit of a DC-DC converter (DC-DC Converter) of an original integrated circuit is disposed on a substrate. Background technique [0002] figure 1 It is the square diagram of the first liquid crystal display of the existing mobile phone. Please refer to figure 1 , the liquid crystal display 100 of the mobile phone is, for example, a low temperature polysilicon (Low Temperature Poly-silicone, LTPS) liquid crystal display, which includes an integrated circuit 110 , a substrate 120 , a gate driver 122 , a data driver 124 and a pixel matrix 126 . The integrated circuit 110 includes a DC-DC voltage converter 112 , a source driver 116 and a Vcom driver 118 . The voltage converter 112 is used to convert the system voltage Vcc (approximately 2.7V-3V) into an operating voltage Vs (approximately 5V) to provide the operati...

Claims

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Application Information

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IPC IPC(8): G02F1/133G09F9/00G09G3/36
Inventor 陈建志孙文堂
Owner AU OPTRONICS CORP
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