LCD panel and LCD device

Abstract

An LCD (liquid crystal display) panel is electrically connected to a control circuit board, which at least outputs a digital signal. The LCD panel includes a transistor substrate, a color filter plate, a liquid crystal layer, and at least one image data driving integrated circuit. The transistor substrate has at least one metal trace. The color filter plate is disposed opposite to the transistor substrate and has a common electrode layer. The liquid crystal layer is disposed between the transistor substrate and color filter plate. The image data driving integrated circuit is disposed on the transistor substrate, and includes a digital-to-analog converting circuit. The digital signal is inputted into the digital-to-analog converting circuit through the metal trace. Then, the digital-to-analog converting circuit converts the digital signal to generate a common voltage, which is outputted to the common electrode layer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will become more fully understood from the detailed description given herein below illustration only, and thus is not limitative of the present invention, and wherein:

FIG. 1 is a schematic sectional illustration of the conventional LCD panel;

FIG. 2 is a schematic illustration showing the architecture of the connection of the conventional LCD panel and the control circuit board;

FIG. 3 is a schematic illustration showing the additional architecture of the connection of the conventional LCD panel and the control circuit board;

FIG. 4 is a schematic illustration showing yet additional architecture of the connection of the conventional LCD panel and the control circuit board;

FIG. 5 is a schematic illustration showing architecture of the connection of a control circuit board and an LCD panel according to a preferred embodiment of the invention;

FIG. 6 is a schematic diagram showing a digital-to-analog converting circuit of the LCD panel according to the embodiment of the invention;

FIG. 7 is a block diagram showing an image data driving IC of the LCD panel according to the embodiment of the invention; and

FIG. 8 is a schematic illustration showing architecture of the connection of a control circuit board and an LCD panel according to another preferred embodiment of the invention.

Claims

1. An LCD (liquid crystal display) panel, which is electrically connected to a control circuit board at least outputting a digital signal, comprising: a transistor substrate;a color filter plate having a common electrode layer and disposed opposite to the transistor substrate;a liquid crystal layer disposed between the transistor substrate and the color filter plate; andat least an image data driving integrated circuit disposed on the transistor substrate and having a digital-to-analog converting circuit, wherein the digital signal is inputted into the digital-to-analog converting circuit, the digital-to-analog converting circuit converts the digital signal to generate a common voltage, and then the common voltage is outputted into the common electrode layer.

2. The LCD panel of claim 1, wherein the digital-to-analog converting circuit has an input terminal electrically connected to the control circuit board and an output terminal electrically connected to the common electrode layer, the digital signal is inputted into the digital-to-analog converting circuit through the input terminal, the digital-to-analog converting circuit converts the digital signal to generate the common voltage, and then the common voltage is outputted into the common electrode layer through the output terminal.

3. The LCD panel of claim 1, wherein the transistor substrate is a TFT (thin-film transistor) glass substrate.

4. The LCD panel of claim 1, wherein the image data driving integrated circuit further comprises an image data register circuit and an image data output buffer circuit, the image data register circuit receives a digital image data outputted from the control circuit board, the digital-to-analog converting circuit converts the digital image data outputted from the control circuit board into an analog image data, and the image data output buffer circuit outputs the analog image data.

5. The LCD panel of claim 1, wherein the image data driving integrated circuit is disposed on the transistor substrate by a flip-chip technology.

6. The LCD panel of claim 1, wherein the image data driving integrated circuit is a chip scale package or a die.

7. The LCD panel of claim 1, wherein the control circuit board comprises a digital signal generating circuit for generating the digital signal.

8. An LCD (liquid crystal display) panel, which is electrically connected to a control circuit board at least outputting a digital signal, comprising: a transistor substrate;a color filter plate having a common electrode layer and disposed opposite to the transistor substrate;a liquid crystal layer disposed between the transistor substrate and the color filter plate; andat least a digital-to-analog converting circuit disposed on the transistor substrate, wherein the digital signal is inputted into the digital-to-analog converting circuit, the digital-to-analog converting circuit converts the digital signal to generate a common voltage, and then the common voltage is outputted intothe common electrode layer.

9. The LCD panel of claim 8, wherein the digital-to-analog converting circuit is a single-chip IC.

10. The LCD panel of claim 8, wherein the digital-to-analog converting circuit is composed of thin-film transistors.

11. The LCD panel of claim 8, wherein the control circuit board comprises a digital signal generating circuit for generating the digital signal.

12. An LCD (liquid crystal display) device, which comprises an LCD panel and a backlight module, wherein the LCD panel is electrically connected to a control circuit board and the control circuit board at least outputs a digital signal, the LCD panel comprising: a transistor substrate;a color filter plate having a common electrode layer and disposed opposite to the transistor substrate;a liquid crystal layer disposed between the transistor substrate and the color filter plate; andat least an image data driving integrated circuit disposed on the transistor substrate and having a digital-to-analog converting circuit, wherein the digital signal is inputted into the digital-to-analog converting circuit, the digital-to-analog converting circuit converts the digital signal to generate a common voltage, and then the common voltage is outputted into the common electrode layer.

13. The LCD device of claim 12, wherein the digital-to-analog converting circuit has an input terminal electrically connected to the control circuit board and an output terminal electrically connected to the common electrode layer, the digital signal is inputted into the digital-to-analog converting circuit through the input terminal, the digital-to-analog converting circuit converts the digital signal to generate the common voltage, and then the common voltage is outputted into the common electrode layer through the output terminal.

14. The LCD device of claim 12, wherein the transistor substrate is a TFT (thin-film transistor) glass substrate.

15. The LCD device of claim 12, wherein the image data driving integrated circuit further comprises an image data register circuit and an image data output buffer circuit, the image data register circuit receives a digital image data outputted from the control circuit board, the digital-to-analog converting circuit converts the digital image data outputted from the control circuit board into an analog image data, and the image data output buffer circuit outputs the analog image data.

16. The LCD device of claim 12, wherein the image data driving integrated circuit is disposed on the transistor substrate by a flip-chip technology.

17. The LCD device of claim 12, wherein the image data driving integrated circuit is a chip scale package or a die.

18. The LCD device of claim 12, wherein the control circuit board comprises a digital signal generating circuit for generating the digital signal.