KR940022128A - LCD and its manufacturing method - Google Patents

Abstract

A liquid crystal display device capable of improving the aperture ratio and reducing the gate wiring capacity is disclosed.

The present invention is characterized in that an additional capacity advantageous in terms of aperture ratio and an accumulation capacity advantageous in terms of gate wiring capacitance are simultaneously formed in a unit pixel, and the two capacity ratios are optimized.

According to the present invention, the aperture ratio is improved, the gate wiring capacitance is reduced, and the display characteristics such as image quality, brightness, contrast ratio and the like are improved.

Description

LCD and its manufacturing method

Since this is an open matter, no full text was included.

5 is a pixel layout diagram of a liquid crystal display device according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view illustrating a lower substrate of the liquid crystal display device taken along the line AA ′ of FIG. 5;

7 is an equivalent circuit diagram of a liquid crystal display device according to the present invention;

8 is a pixel layout of an additional capacitance type liquid crystal display device having a ring structure patented by the present applicant.

Claims (31)

A plurality of gate lines and signal lines arranged in a matrix on one surface of the substrate, the gate lines and signal lines defining a matrix of respective pixel regions demarcated by a pointed gate line and two signal lines; A pixel electrode disposed in a pixel region, a switching element disposed in each pixel region for transmitting a signal of each signal line to each pixel electrode, and connected to each of the gate lines, and disposed in each pixel region A first electrode having an additional capacitance formed so as to face a portion of the pixel electrode via the insulating layer, and driven independently of the gate lines, and disposed in the pixel region so as to face a portion of the pixel electrode via the insulating layer; And a first electrode of the formed storage capacitor. 2. The liquid crystal display device according to claim 1, wherein the first electrode of the additional capacitance and the first electrode of the storage capacitance are made of the same material as the gate line. The liquid crystal display device according to claim 1, wherein the first electrode of the storage capacitor is made of a transparent metal. The liquid crystal display device according to claim 1, wherein the first electrode of the additional capacitance has a shape in which the gate line partially protrudes into each pixel area. 2. The liquid crystal display device according to claim 1, wherein both the first electrode of the additional capacitance and the first electrode of the storage capacitor have a single wiring form. The liquid crystal display device according to claim 1, wherein at least one of the first electrode of the additional capacitance and the first electrode of the storage capacitance is formed in an annular structure around the pixel electrode. 7. The liquid crystal display device according to claim 6, wherein the first electrode of the capacitor formed in the annular structure is connected to the first electrode of the capacitor formed in the adjacent pixel region by double wiring. The liquid crystal display of claim 1, wherein the first electrode of the storage capacitor is made of a material such as a bonding pad formed on the transparent substrate to connect the gate line to an external driving circuit. 2. The liquid crystal according to claim 1, wherein the area of the first electrode of the additional capacitance and the first electrode of the storage capacitance is formed at a constant ratio in consideration of the capacity ratio of the additional capacitance and the storage capacitance in each unit pixel region. Display. 10. The liquid crystal display device according to claim 9, wherein the area of the first electrode of the storage capacitor is about 80% or more than the area of the first electrode of the additional capacitor. The liquid crystal display device according to claim 1, wherein the switching element is a thin film transistor. A plurality of gate lines and signal lines arranged in a matrix on one surface of the substrate and defining a matrix of each pixel region bordered by two adjacent gate lines and two signal lines; A pixel electrode disposed in an area, a switching element disposed in each pixel area to transfer a signal of each signal line to each pixel electrode, and connected to each gate line, and arranged in each pixel area A first electrode having an additional capacitance formed so as to face a portion of the electrode via the insulating layer, and independently of the respective gate lines, disposed in each pixel region, and insulated from the portion in an annular shape around the pixel electrode; And a first electrode having a storage capacitor formed so as to face each other via a layer. 13. The liquid crystal display device according to claim 12, wherein the first electrodes of the storage capacitors are connected by a double wiring method. 13. The liquid crystal display device according to claim 12, wherein the first electrode of the storage capacitor is made of a transparent metal. A plurality of gate lines and signal lines arranged in a matrix on one surface of the substrate and defining a matrix of each pixel region bordered by two adjacent gate lines and two signal lines; A pixel electrode disposed in an area, a switching element disposed in each pixel area for transmitting a signal of each signal line to each pixel electrode, and a part of the switching electrode connected to each gate line, and arranged in each pixel area And a portion of the first electrode having an additional capacitance formed to be connected to the portion of the pixel electrode in an annular shape with an insulating layer interposed therebetween, and adjacent to the adjacent portion, and independently of the respective gate lines. It is driven and disposed in each pixel area, and faces a portion of the pixel electrode in an annular shape with an insulating layer interposed therebetween. And a first electrode of a storage capacitor formed so as to be connected to an adjacent portion by a double wiring. The liquid crystal display device according to claim 15, wherein the first electrode of the additional capacitance and the first electrode of the storage capacitance are made of the same material as the gate line. 17. The liquid crystal display device according to claim 16, wherein the gate line, the first electrode of the additional capacitance, and the first electrode of the storage capacitance are patterned simultaneously in the same planar structure. The liquid crystal display of claim 15, wherein the first electrode of the storage capacitor is made of a different material from the gate electrode and the first electrode of the additional capacitor. 19. The liquid crystal display device according to claim 18, wherein the first electrode of the storage capacitor is made of a transparent metal. 16. The switching device of claim 15, wherein the switching device comprises: a gate electrode formed of the gate line, a drain electrode formed of a protrusion of the signal line, a source electrode overlapping a portion of the pixel electrode, and an insulating layer on the gate line; And a thin film transistor including a semiconductor layer disposed to be patterned to connect the drain electrode and the source electrode. 21. The liquid crystal display device according to claim 20, wherein the gate electrode, the drain electrode, and the semiconductor layer of the thin film transistor are disposed outside the boundary of each pixel electrode. A front glass substrate having an inner side and an outer side, and having an inner side and an outer side, parallel to the front glass substrate at a predetermined distance, and having an inner side facing the inner side of the front glass substrate; A plurality of gate lines and signal lines arranged in a matrix on the inner surface of the rear glass substrate, the plurality of gate lines and signal lines defining a matrix of pixel regions bordered by two adjacent gate lines and two signal lines; A pixel electrode disposed in each pixel region, a switching element disposed in each pixel region for transmitting a signal of each signal line to each pixel electrode, and connected to each gate line and disposed in each pixel region A first electrode of an additional capacitance formed so as to face a part of each pixel electrode via an insulating layer, and independently of the respective gate lines A first electrode having a storage capacitor disposed in each pixel area so as to face a portion of each pixel electrode via an insulating layer, and arranged on an inner surface of the front glass substrate to be aligned with each pixel area. A light blocking layer matrix patterned to define a light transmitting aperture surface, a color filter formed on the inner surface of the front glass substrate and covering the light transmitting aperture surface and the light shielding film, and a transparent electrode disposed on the color filter layer; And a liquid crystal layer interposed between the front glass substrate and the rear glass substrate. 23. The liquid crystal display device according to claim 22, wherein a first protective layer is inserted between the color filter layer and the transparent electrode. 23. The liquid crystal display device according to claim 22, wherein a second protective layer is formed on the inner surface of the rear glass substrate. 23. The method of claim 22, wherein a portion of the first electrode of the additional capacitance is connected to each of the gate lines, and is disposed in each of the pixel regions and is disposed in a ring shape around the pixel electrode and interposed therebetween with the portion and the insulating layer. Opposed to and adjacent to the adjacent portion, and the first electrode of the storage capacitor is driven independently of each of the gate lines, and disposed in each of the pixel areas and annular along the periphery of each pixel electrode. A liquid crystal display device, wherein the liquid crystal display is formed to face a portion thereof through an insulating layer, and the adjacent portion is formed to be connected by a double wiring. The peripheral boundary of the opening surface defined by the edge of the light shielding layer is aligned almost perpendicularly to the inner edge of the first electrode of the additional capacitance and the accumulation capacitance formed at the edge of the pixel electrode. And wherein each of the first electrodes serves an additional shielding role to reduce light other than the light that is allowed to pass through the opening surface. 26. The liquid crystal of claim 25, wherein the transparency to each of the opening surfaces through the rear glass substrate defines a virtual opening surface, and the first electrode of each capacitance does not extend into the virtual opening surface. Display. A plurality of gate lines and signal lines arranged in a matrix on one surface of the substrate and defining a matrix of each pixel region bordered by two adjacent gate lines and two signal lines; A pixel electrode disposed in an area, a switching element disposed in each pixel area to transfer a signal of each signal line to each pixel electrode, and connected to each gate line, and arranged in each pixel area A first electrode having an additional capacitance formed so as to face a portion of the electrode via the insulating layer, and is driven independently of the gate lines, and is disposed in each pixel area so as to face a portion of each pixel electrode via the insulating layer. A method for manufacturing a liquid crystal display device, comprising: a first electrode having a storage capacitor; Stacking a first metal layer on a plate and forming a bonding pad for electrical connection with an external driving circuit; and stacking and patterning a second metal layer on the resultant to form a plurality of gate lines, additional capacitance, and first storage capacitor Forming an electrode, and subsequently forming an insulating layer and a semiconductor layer on the resultant, and patterning the semiconductor layer so that the semiconductor layer remains only near the intersections of the gate lines and the signal lines; Forming a pixel electrode so as to face the first electrode of the additional capacitance and the storage capacitance; and stacking and patterning a third metal layer on the resultant to complete a plurality of signal lines and the source and drain of the thin film transistor. Method of manufacturing a liquid crystal display device, characterized in that made. 29. The method of claim 28, wherein the plurality of gate lines and the first electrodes of the additional capacitance and the storage capacitance are formed by patterning at the same time. 29. The manufacturing method of a liquid crystal display device according to claim 28, wherein the first electrode of the additional capacitance and the first electrode of the storage capacitance are formed by patterning in a separate process. 31. The method of claim 30, wherein the first electrode of the additional capacitance is formed of a transparent metal. ※ Note: The disclosure is based on the initial application.