Display substrate and manufacturing method therefor, and liquid-crystal display panel and display apparatus

Abstract

A display substrate and a manufacturing method therefor, and a liquid-crystal display panel and a display apparatus. The display substrate comprises: a base substrate (10); a drive circuit layer, which is located on the base substrate (10); a first electrode, which is located on the base substrate (10); an insulating layer, which is located on the side of the first electrode that is away from the base substrate (10); and a second electrode, which is located on the side of the insulating layer that is away from the substrate (10), wherein the second electrode comprises a plurality of strip-shaped electrodes arranged at intervals, and the second electrode is made of opaque metal (21), such that the contrast of a liquid-crystal display panel is increased.

Description

Display substrate and its manufacturing method, liquid crystal display panel and display device Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display substrate and its manufacturing method, a liquid crystal display panel, and a display device. Background Technology

[0002] In LCD panels, contrast ratio is a crucial technical parameter and a core indicator. LCD panel contrast ratio is divided into static contrast ratio and dynamic contrast ratio. The static contrast ratio is the true contrast ratio of the LCD panel, referring to the ratio of its highest brightness (white state) to its lowest brightness (black state) in a dark room. A higher contrast ratio results in a stronger sense of image depth and a more immersive visual experience, meaning clearer image quality and richer, more delicate colors; conversely, a lower contrast ratio results in a hazy image and significant color loss. Summary of the Invention

[0003] The technical problem to be solved by this disclosure is to provide a display substrate and its manufacturing method, a liquid crystal display panel and a display device, which can improve the contrast of the liquid crystal display panel.

[0004] To address the aforementioned technical problems, the embodiments of this disclosure provide the following technical solutions:

[0005] On one hand, a display substrate is provided, comprising:

[0006] Substrate;

[0007] The driving circuit layer is located on the substrate.

[0008] The first electrode is located on the substrate.

[0009] An insulating layer located on the side of the first electrode away from the substrate;

[0010] The second electrode is located on the side of the insulating layer away from the substrate.

[0011] The second electrode comprises a plurality of spaced strip electrodes and is made of an opaque metal material.

[0012] In some embodiments, the first electrode is a planar common electrode, and the first electrode is made of a light-transmitting conductive material; the second electrode is a pixel electrode.

[0013] In some embodiments, the first electrode is a planar pixel electrode, and the first electrode is made of a light-transmitting conductive material; the second electrode is a common electrode.

[0014] In some embodiments, the driving circuit layer includes data lines and gate lines, the orthographic projections of the data lines and the gate lines on the substrate being located within the orthographic projection of the common electrode on the substrate.

[0015] In some embodiments, the driving circuit layer includes a pattern of a source / drain metal layer, and the second electrode is disposed in the same layer and with the same material as the pattern of the source / drain metal layer.

[0016] In some embodiments, the driving circuit layer further includes a pattern of a gate metal layer, and the first electrode is disposed on the same layer as the pattern of the gate metal layer.

[0017] In some embodiments, the thickness of the second electrode is 350-1000 angstroms.

[0018] In some embodiments, the angle between the side surface of the second electrode and the substrate is 15-45°.

[0019] In some embodiments, the width of the strip electrode is 1.5-3 micrometers.

[0020] Embodiments of this disclosure also provide a liquid crystal display panel, including the display substrate described above.

[0021] Embodiments of this disclosure also provide a display device, including a liquid crystal display panel as described above.

[0022] Embodiments of this disclosure also provide a method for manufacturing a display substrate, comprising:

[0023] Provide a substrate;

[0024] A driving circuit layer is formed on the substrate.

[0025] A first electrode is formed on the substrate.

[0026] An insulating layer is formed on the side of the first electrode away from the substrate.

[0027] A second electrode is formed on the side of the insulating layer away from the substrate.

[0028] The second electrode comprises a plurality of spaced strip electrodes and is made of an opaque metal material.

[0029] In some embodiments, forming the first electrode includes:

[0030] The first electrode is formed using a light-transmitting and conductive material.

[0031] In some embodiments, the driving circuit layer includes a pattern of source / drain metal layers, and forming the second electrode includes:

[0032] The source / drain metal layer and the second electrode are formed through a single patterning process.

[0033] In some embodiments, the driving circuit layer further includes a pattern of a gate metal layer, forming the first electrode by:

[0034] The first electrode is formed in the same layer as the pattern of the gate metal layer.

[0035] The embodiments disclosed herein have the following beneficial effects:

[0036] In the above scheme, the strip electrode located on the top layer of the display substrate is made of opaque metal material. In this way, even if the liquid crystal display panel has light leakage problem in the black state, the light-blocking effect of the opaque metal electrode can make the liquid crystal display panel display a near-pure black effect in the black state. The black state brightness of the liquid crystal display panel is almost pure black. In this way, the minimum brightness of the liquid crystal display panel can be reduced while the maximum brightness of the liquid crystal display panel remains unchanged, thereby improving the contrast of the liquid crystal display panel. Attached Figure Description

[0037] Figure 1a is a schematic diagram of the pixel electrodes of an existing liquid crystal display panel using a light-transmitting conductive material;

[0038] Figure 1b is a schematic diagram of a common electrode in an existing liquid crystal display panel using a light-transmitting conductive material;

[0039] Figure 2 is a schematic diagram of the transmittance of a liquid crystal display panel when the pixel electrode is made of a light-transmitting conductive material;

[0040] Figure 3 is a schematic diagram of the structure of a display substrate according to an embodiment of this disclosure;

[0041] Figure 4 is a cross-sectional schematic diagram of the display substrate shown in Figure 3 in the AA' direction;

[0042] Figure 5 is a cross-sectional schematic diagram of the display substrate shown in Figure 3 in the DD' direction;

[0043] Figure 6 is a schematic diagram of the transmittance of the display substrate shown in Figure 3;

[0044] Figure 7 is a schematic diagram of the structure of a display substrate according to another embodiment of this disclosure;

[0045] Figure 8 is a cross-sectional schematic diagram of the display substrate shown in Figure 7 in the BB' direction;

[0046] Figure 9 is a cross-sectional schematic diagram of the display substrate shown in Figure 7 in the EE' direction;

[0047] Figure 10 is a schematic diagram of the transmittance of the display substrate shown in Figure 7;

[0048] Figure 11 is a schematic diagram of the structure of a display substrate according to another embodiment of the present disclosure;

[0049] Figure 12 is a cross-sectional schematic diagram of the display substrate shown in Figure 11 in the CC' direction;

[0050] Figure 13 is a cross-sectional schematic diagram of the display substrate shown in Figure 11 in the FF' direction;

[0051] Figure 14 is a schematic diagram of the transmittance of the display substrate shown in Figure 11.

[0052] Figure reference numeral 10: Substrate; 11: Gate metal layer; 12: Active layer; 13: Source / drain metal layer; 14: Organic insulating layer; 15: Common electrode; 16: Passivation layer; 17: Pixel electrode; 18: Gate insulating layer; 19: Interlayer insulating layer; 21: Opaque metal; 151: Connecting electrode. Detailed Implementation

[0053] To make the technical problems, technical solutions and advantages of the embodiments of this disclosure clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0054] FFS (Fringe Field Switching) is a technique that uses the edge electric field generated between the top strip electrodes and the bottom planar electrodes on an array substrate to allow liquid crystal molecules between the electrodes and directly above the electrodes to rotate in a plane parallel to the substrate. The top strip electrodes can be pixel electrodes, and the bottom planar electrodes can be common electrodes; alternatively, the top strip electrodes can be common electrodes, and the bottom planar electrodes can be pixel electrodes. Figure 1a shows a schematic diagram of a liquid crystal display panel pixel electrodes using a light-transmitting conductive material; Figure 1b shows a schematic diagram of a conventional liquid crystal display panel common electrode (com electrode) using a light-transmitting conductive material.

[0055] When the liquid crystal display panel is in the white state, the intensity of the horizontal electric field alternates periodically with the distribution of the top strip electrode, and the rotation angle of the liquid crystal molecules also alternates. Specifically, the rotation angle of the liquid crystal molecules is largest at the edge of the top strip electrode, resulting in the highest light transmittance; while the rotation angle is smallest in the central region of the top strip electrode, resulting in lower light transmittance. Figure 2 shows a schematic diagram of the transmittance of the liquid crystal display panel when the pixel electrode uses a light-transmitting conductive material. As shown in Figure 2, when the top strip electrode is a transparent electrode, both the edge and central regions of the top strip electrode contribute to the light transmittance. However, in the black state, the pretilt angle of the liquid crystal molecules and the irregular arrangement of the liquid crystal molecules near the top strip electrode easily cause light leakage in the black state, meaning the black state is not dark enough, resulting in a relatively low contrast of the liquid crystal display panel.

[0056] This disclosure provides a display substrate and its manufacturing method, a liquid crystal display panel, and a display device, which can improve the contrast of the liquid crystal display panel.

[0057] As defined by the static contrast ratio of a liquid crystal display (LCD) panel, increasing the white brightness or decreasing the black brightness of the LCD panel can improve contrast. In practical applications, decreasing black brightness contributes more significantly to improving contrast than increasing white brightness. This embodiment uses the method of decreasing black brightness to improve contrast.

[0058] Embodiments of this disclosure provide a display substrate, as shown in Figures 3-5, 7-9, and 11-13, the display substrate comprising:

[0059] Substrate 10;

[0060] The driving circuit layer is located on the substrate 10;

[0061] The first electrode is located on the substrate 10;

[0062] An insulating layer located on the side of the first electrode away from the substrate 10;

[0063] The second electrode is located on the side of the insulating layer away from the substrate 10;

[0064] The second electrode comprises a plurality of spaced strip electrodes and is made of an opaque metal material.

[0065] In this embodiment, the strip electrode located on the top layer of the display substrate is made of an opaque metal material. In this way, even if the liquid crystal display panel has a light leakage problem in the black state, the light-blocking effect of the opaque metal electrode can make the liquid crystal display panel display a near-pure black effect in the black state. The brightness of the liquid crystal display panel in the black state is almost pure black. In this way, the minimum brightness of the liquid crystal display panel can be reduced while the maximum brightness of the liquid crystal display panel remains unchanged, thereby improving the contrast of the liquid crystal display panel.

[0066] The opaque metal material can be made of metals such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, and W, as well as alloys of these metals. The first electrode can be made of a transparent conductive material such as ITO, IZO, or other transparent metal oxides.

[0067] The first electrode can be a planar common electrode 15, and the second electrode can be a pixel electrode 17. Alternatively, the first electrode can be a planar pixel electrode 17, and the second electrode can be a common electrode 15.

[0068] In one specific embodiment, the first electrode is a planar common electrode 15, and the first electrode is made of a light-transmitting conductive material; the second electrode is a pixel electrode 17.

[0069] As shown in Figures 3-5, the display substrate includes a substrate 10, a gate metal layer 11, a gate insulating layer 18, an active layer 12, a source / drain metal layer 13, an interlayer insulating layer 19, an organic insulating layer 14, a common electrode 15, a passivation layer 16, and a pixel electrode 17 located on the substrate 10. The substrate 10 can be a glass substrate or a quartz substrate. The gate metal layer 11 includes a gate electrode and gate lines. The gate metal layer 11 can be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or alloys of these metals. The gate metal layer 11 can be a single-layer structure or a multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The source / drain metal layer 13 includes data lines, a source electrode, and a drain electrode. The source / drain metal layer 13 can be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or alloys of these metals. The source / drain metal layer 13 can be a single-layer or multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The gate insulating layer 18, passivation layer 16, and interlayer insulating layer 19 can be oxides, nitrides, or oxynitrogen compounds. The organic insulating layer 14 can be an organic resin, such as benzocyclobutene (BCB), or other organic photosensitive materials. The common electrode 15 can be ITO, IZO, or other light-transmitting and conductive materials, and is a planar electrode. The pixel electrode 17 is a strip electrode and can be made of metals such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, and alloys of these metals.

[0070] Figure 6 is a schematic diagram of the transmittance of the display substrate shown in Figure 3. It can be seen that the transmittance of the display substrate in the area where the pixel electrode 17 is located is basically 0. In this embodiment, even if the liquid crystal display panel has a light leakage problem in the black state, because the pixel electrode 17 is made of an opaque metal material, the light-blocking effect of the pixel electrode 17 allows the liquid crystal display panel to display a near-pure black effect in the black state. The brightness of the liquid crystal display panel in the black state is almost pure black. In this way, while keeping the maximum brightness of the liquid crystal display panel unchanged, the minimum brightness of the liquid crystal display panel can be reduced, thereby improving the contrast of the liquid crystal display panel.

[0071] In this embodiment, the thickness of the pixel electrode 17 can be 350-1000 angstroms, the angle between the side surface of the pixel electrode 17 and the substrate 10 can be 15-45°, and the width of each strip electrode can be 1.5-3 micrometers.

[0072] When the pixel electrode 17 adopts the above parameters, the liquid crystal display panel can display a near-pure black effect in the black state, and the black state brightness of the liquid crystal display panel is almost pure black. In this way, while the maximum brightness of the liquid crystal display panel remains unchanged, the minimum brightness of the liquid crystal display panel can be reduced, which can greatly improve the contrast of the liquid crystal display panel.

[0073] In another specific embodiment, the first electrode is a planar pixel electrode 17, and the first electrode is made of a light-transmitting conductive material; the second electrode is a common electrode 15.

[0074] As shown in Figures 7-9, the display substrate includes a substrate 10, a gate metal layer 11, a gate insulating layer 18, an active layer 12, a source / drain metal layer 13, an interlayer insulating layer 19, an organic insulating layer 14, a pixel electrode 17, a passivation layer 16, and a common electrode 15 located on the substrate 10. The substrate 10 can be a glass substrate or a quartz substrate. The gate metal layer 11 includes a gate electrode and gate lines. The gate metal layer 11 can be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or alloys of these metals. The gate metal layer 11 can be a single-layer structure or a multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The source / drain metal layer 13 includes data lines, a source electrode, and a drain electrode. The source / drain metal layer 13 can be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or alloys of these metals. The source / drain metal layer 13 can be a single-layer or multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The gate insulating layer 18, passivation layer 16, and interlayer insulating layer 19 can be oxides, nitrides, or oxynitrogen compounds. The organic insulating layer 14 can be an organic resin, such as benzocyclobutene (BCB), or other organic photosensitive materials. The pixel electrode 17 can be made of ITO, IZO, or other light-transmitting conductive materials, and is a planar electrode. The common electrode 15 is a strip electrode and can be made of metals such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, and alloys of these metals. A connecting electrode 151 is also provided in the same layer as the common electrode 15, through which the pixel electrode 17 and the drain electrode can be connected.

[0075] Figure 10 is a schematic diagram of the transmittance of the display substrate shown in Figure 7. It can be seen that the transmittance of the display substrate in the area where the common electrode 15 is located is basically 0. In this embodiment, even if the liquid crystal display panel has a light leakage problem in the black state, because the common electrode 15 is made of an opaque metal material, the light-shielding effect of the common electrode 15 allows the liquid crystal display panel to display a near-pure black effect in the black state. The brightness of the liquid crystal display panel in the black state is almost pure black. In this way, while keeping the maximum brightness of the liquid crystal display panel unchanged, the minimum brightness of the liquid crystal display panel can be reduced, thereby improving the contrast of the liquid crystal display panel.

[0076] In this embodiment, the thickness of the common electrode 15 can be 350-1000 angstroms, the angle between the side surface of the common electrode 15 and the substrate 10 can be 15-45°, and the width of each strip electrode can be 1.5-3 micrometers.

[0077] When the above parameters are used in the common electrode 15, the liquid crystal display panel can display a near-pure black effect in the black state, and the black state brightness of the liquid crystal display panel is almost pure black. In this way, while the maximum brightness of the liquid crystal display panel remains unchanged, the minimum brightness of the liquid crystal display panel can be reduced, which can greatly improve the contrast of the liquid crystal display panel.

[0078] In this embodiment, the driving circuit layer includes data lines and gate lines. The orthographic projections of the data lines and gate lines on the substrate 10 are located within the orthographic projection of the common electrode 15 on the substrate 10. The common electrode 15 can shield the data lines and gate lines. With this configuration, both the data lines and gate lines are covered by a metal common electrode. Due to the light-shielding effect of the metal common electrode, the decrease in transmittance and color bleeding caused by poor panel assembly alignment accuracy can be improved.

[0079] In addition, the common electrode 15 is made of opaque metal material. Compared with the common electrode 15 made of light-transmitting conductive material, the impedance of the common electrode 15 can be reduced. When the display is performed on the liquid crystal display panel, the common voltage on the common electrode 15 can be restored to the common voltage more quickly after being affected by the data line coupling. This improves the crosstalk and greenish phenomenon.

[0080] In another specific embodiment, the first electrode is a planar common electrode 15, and the first electrode is made of a light-transmitting conductive material; the second electrode is a pixel electrode 17.

[0081] As shown in Figures 11-13, the display substrate includes a substrate 10, a gate metal layer 11, a common electrode 15, a gate insulating layer 18, an active layer 12, a source / drain metal layer 13, and a pixel electrode 17 located on the substrate 10. The patterns of the source / drain metal layer 13 and the pixel electrode 17 are both made of opaque metal 21. The substrate 10 can be a glass substrate or a quartz substrate. The pattern of the gate metal layer 11 includes gate electrodes and gate lines. The gate metal layer 11 can be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or alloys of these metals. The gate metal layer 11 can be a single-layer structure or a multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The pattern of the source / drain metal layer 13 includes data lines, source electrodes, and drain electrodes. The source / drain metal layer 13 can be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or alloys of these metals. The source / drain metal layer 13 can be a single-layer or multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The gate insulating layer 18 can be an oxide, nitride, or oxynitride compound. In this embodiment, the common electrode 15 is located between the substrate 10 and the gate insulating layer 18, and is disposed in the same layer as the pattern of the gate metal layer 11. The common electrode 15 can be made of ITO, IZO, or other light-transmitting and conductive materials, and is a planar electrode. The pixel electrode 17 is a strip electrode, and can be made of metals such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, and alloys of these metals, and is disposed in the same layer and with the same material as the pattern of the source / drain metal layer 13. In this way, the pattern of the source / drain metal layer 13 and the pixel electrode 17 can be prepared in the same patterning process, which can save the number of patterning processes in the fabrication of the display substrate and reduce the manufacturing cost of the display substrate.

[0082] Figure 14 is a schematic diagram of the transmittance of the display substrate shown in Figure 11. It can be seen that the transmittance of the display substrate in the area where the pixel electrode 17 is located is basically 0. In this embodiment, even if the liquid crystal display panel has a light leakage problem in the black state, because the pixel electrode 17 is made of an opaque metal material, the light-blocking effect of the pixel electrode 17 allows the liquid crystal display panel to display a near-pure black effect in the black state. The brightness of the liquid crystal display panel in the black state is almost pure black. In this way, while keeping the maximum brightness of the liquid crystal display panel unchanged, the minimum brightness of the liquid crystal display panel can be reduced, thereby improving the contrast of the liquid crystal display panel.

[0083] In this embodiment, the thickness of the pixel electrode 17 can be 350-1000 angstroms, the angle between the side surface of the pixel electrode 17 and the substrate 10 can be 15-45°, and the width of each strip electrode can be 1.5-3 micrometers.

[0084] When the pixel electrode 17 adopts the above parameters, the liquid crystal display panel can display a near-pure black effect in the black state, and the black state brightness of the liquid crystal display panel is almost pure black. In this way, while the maximum brightness of the liquid crystal display panel remains unchanged, the minimum brightness of the liquid crystal display panel can be reduced, which can greatly improve the contrast of the liquid crystal display panel.

[0085] The embodiments of this disclosure also provide a liquid crystal display panel, including a display substrate as described above, a color filter substrate disposed opposite to the display substrate, and a liquid crystal cell located between the display substrate and the color filter substrate. The liquid crystal display panel of this embodiment is suitable for FFS display mode and can also be applied to IPS (In-Plane Switching) display mode. As long as the strip electrode near the light-emitting side of the liquid crystal display panel is made of an opaque metal material, the contrast of the liquid crystal display panel can be effectively improved.

[0086] Embodiments of this disclosure also provide a display device, including a liquid crystal display panel as described above.

[0087] The display device includes, but is not limited to, components such as: a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply. Those skilled in the art will understand that the structure of the display device described above does not constitute a limitation on the display device; the display device may include more or fewer of the aforementioned components, or combine certain components, or arrange different components. In the embodiments of this disclosure, the display device includes, but is not limited to, a monitor, a mobile phone, a tablet computer, a television set, a wearable electronic device, a navigation display device, etc.

[0088] The display device can be any product or component with display function, such as an LCD TV, LCD monitor, digital photo frame, mobile phone, or tablet computer. The display device also includes a flexible circuit board, a printed circuit board, and a backplate.

[0089] Embodiments of this disclosure also provide a method for manufacturing a display substrate, comprising:

[0090] A substrate 10 is provided;

[0091] A driving circuit layer is formed on the substrate 10;

[0092] A first electrode is formed on the substrate 10;

[0093] An insulating layer is formed on the side of the first electrode away from the substrate 10;

[0094] A second electrode is formed on the side of the insulating layer away from the substrate 10;

[0095] The second electrode comprises a plurality of spaced strip electrodes and is made of an opaque metal material.

[0096] In this embodiment, the strip electrode located on the top layer of the display substrate is made of an opaque metal material. In this way, even if the liquid crystal display panel has a light leakage problem in the black state, the light-blocking effect of the opaque metal electrode can make the liquid crystal display panel display a near-pure black effect in the black state. The brightness of the liquid crystal display panel in the black state is almost pure black. In this way, the minimum brightness of the liquid crystal display panel can be reduced while the maximum brightness of the liquid crystal display panel remains unchanged, thereby improving the contrast of the liquid crystal display panel.

[0097] In this embodiment, the first electrode can be formed using a light-transmitting and conductive material such as ITO, IZO, or other transparent metal oxides. The first electrode can be a planar common electrode 15, and the second electrode can be a pixel electrode 17. Alternatively, the first electrode can be a planar pixel electrode 17, and the second electrode can be a common electrode 15. The aforementioned opaque metal material can be metals such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, and alloys of these metals.

[0098] In one specific embodiment, the first electrode is a planar common electrode 15, and the first electrode is made of a light-transmitting conductive material; the second electrode is a pixel electrode 17.

[0099] As shown in Figures 3-5, the manufacturing method of the display substrate includes:

[0100] Substrate 10 is provided;

[0101] A pattern of a gate metal layer 11 is formed on the substrate 10;

[0102] A gate insulating layer 18 is formed covering the gate metal layer 11;

[0103] The active layer 12 and the source / drain metal layer 13 are patterned on the gate insulating layer 18;

[0104] An interlayer insulating layer 19 is formed covering the active layer 12 and the source / drain metal layer 13;

[0105] Form an organic insulating layer 14;

[0106] A common electrode 15 is formed on the organic insulating layer 14;

[0107] A passivation layer 16 is formed covering the common electrode 15;

[0108] A pixel electrode 17 is formed on the passivation layer 16.

[0109] The substrate 10 can be a glass substrate or a quartz substrate. The gate metal layer 11 includes a gate electrode and gate lines. The gate metal layer 11 can be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or alloys of these metals. The gate metal layer 11 can be a single-layer structure or a multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The source / drain metal layer 13 includes data lines, a source electrode, and a drain electrode. The source / drain metal layer 13 can be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or alloys of these metals. The source / drain metal layer 13 can be a single-layer structure or a multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The gate insulating layer 18, passivation layer 16, and interlayer insulating layer 19 can be oxides, nitrides, or oxynitride compounds. The organic insulating layer 14 can be made of organic resin, such as benzocyclobutene (BCB), or other organic photosensitive materials. The common electrode 15 can be made of ITO, IZO, or other light-transmitting and conductive materials, and is a planar electrode. The pixel electrode 17 is a strip electrode and can be made of metals such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, and alloys of these metals.

[0110] Figure 6 is a schematic diagram of the transmittance of the display substrate shown in Figure 3. It can be seen that the transmittance of the display substrate in the area where the pixel electrode 17 is located is basically 0. In this embodiment, even if the liquid crystal display panel has a light leakage problem in the black state, because the pixel electrode 17 is made of an opaque metal material, the light-blocking effect of the pixel electrode 17 allows the liquid crystal display panel to display a near-pure black effect in the black state. The brightness of the liquid crystal display panel in the black state is almost pure black. In this way, while keeping the maximum brightness of the liquid crystal display panel unchanged, the minimum brightness of the liquid crystal display panel can be reduced, thereby improving the contrast of the liquid crystal display panel.

[0111] In another specific embodiment, the first electrode is a planar pixel electrode 17, and the first electrode is made of a light-transmitting conductive material; the second electrode is a common electrode 15.

[0112] As shown in Figures 7-9, the manufacturing method of the display substrate includes:

[0113] Substrate 10 is provided;

[0114] A pattern of a gate metal layer 11 is formed on the substrate 10;

[0115] A gate insulating layer 18 is formed covering the gate metal layer 11;

[0116] The active layer 12 and the source / drain metal layer 13 are patterned on the gate insulating layer 18;

[0117] An interlayer insulating layer 19 is formed covering the active layer 12 and the source / drain metal layer 13;

[0118] Form an organic insulating layer 14;

[0119] A pixel electrode 17 is formed on the organic insulating layer 14;

[0120] A passivation layer 16 is formed covering the common electrode 15;

[0121] A common electrode 15 is formed on the passivation layer 16.

[0122] The substrate 10 can be a glass substrate or a quartz substrate. The gate metal layer 11 includes a gate electrode and gate lines. The gate metal layer 11 can be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or alloys of these metals. The gate metal layer 11 can be a single-layer structure or a multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The source / drain metal layer 13 includes data lines, a source electrode, and a drain electrode. The source / drain metal layer 13 can be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or alloys of these metals. The source / drain metal layer 13 can be a single-layer structure or a multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The gate insulating layer 18, passivation layer 16, and interlayer insulating layer 19 can be oxides, nitrides, or oxynitride compounds. The organic insulating layer 14 can be made of organic resin, such as benzocyclobutene (BCB), or other organic photosensitive materials. The pixel electrode 17 can be made of ITO, IZO, or other light-transmitting conductive materials, and is a planar electrode. The common electrode 15 is a strip electrode and can be made of metals such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or alloys of these metals. A connecting electrode 151 is also provided in the same layer as the common electrode 15, through which the pixel electrode 17 and the drain electrode can be connected.

[0123] Figure 10 is a schematic diagram of the transmittance of the display substrate shown in Figure 7. It can be seen that the transmittance of the display substrate in the area where the common electrode 15 is located is basically 0. In this embodiment, even if the liquid crystal display panel has a light leakage problem in the black state, because the common electrode 15 is made of an opaque metal material, the light-shielding effect of the common electrode 15 allows the liquid crystal display panel to display a near-pure black effect in the black state. The brightness of the liquid crystal display panel in the black state is almost pure black. In this way, while keeping the maximum brightness of the liquid crystal display panel unchanged, the minimum brightness of the liquid crystal display panel can be reduced, thereby improving the contrast of the liquid crystal display panel.

[0124] In another specific embodiment, the first electrode is a planar common electrode 15, and the first electrode is made of a light-transmitting conductive material; the second electrode is a pixel electrode 17.

[0125] As shown in Figures 11-13, the manufacturing method of the display substrate includes:

[0126] Substrate 10 is provided;

[0127] A pattern of a gate metal layer 11 is formed on the substrate 10, and a first electrode is formed in the same layer as the pattern of the gate metal layer 11.

[0128] A gate insulating layer 18 is formed covering the gate metal layer 11 and the common electrode 15;

[0129] An active layer 12 is formed on the gate insulating layer 18;

[0130] The source / drain metal layer 13 and pixel electrode 17 are formed in a single patterning process. Both the source / drain metal layer 13 and pixel electrode 17 are made of opaque metal 21.

[0131] The substrate 10 can be a glass substrate or a quartz substrate. The gate metal layer 11 includes a gate electrode and gate lines. The gate metal layer 11 can be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or an alloy of these metals. The gate metal layer 11 can be a single-layer structure or a multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The source / drain metal layer 13 includes a data line, a source electrode, and a drain electrode. The source / drain metal layer 13 can be a metal such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, or an alloy of these metals. The source / drain metal layer 13 can be a single-layer structure or a multi-layer structure, such as Cu\Mo, Ti\Cu\Ti, Mo\Al\Mo, etc. The gate insulating layer 18 can be an oxide, nitride, or oxynitride compound. In this embodiment, the common electrode 15 can be made of ITO, IZO, or other light-transmitting and conductive materials, and the common electrode 15 is a planar electrode. The pixel electrode 17 is a strip electrode and can be made of metals such as Cu, Al, Ag, Mo, Cr, Nd, Ni, Mn, Ti, Ta, W, and alloys of these metals. It is set in the same layer and with the same material as the source / drain metal layer 13. In this way, the source / drain metal layer 13 and the pixel electrode 17 can be prepared in the same patterning process, which can save the number of patterning processes in the fabrication of the display substrate and reduce the manufacturing cost of the display substrate.

[0132] Figure 14 is a schematic diagram of the transmittance of the display substrate shown in Figure 11. It can be seen that the transmittance of the display substrate in the area where the pixel electrode 17 is located is basically 0. In this embodiment, even if the liquid crystal display panel has a light leakage problem in the black state, because the pixel electrode 17 is made of an opaque metal material, the light-blocking effect of the pixel electrode 17 allows the liquid crystal display panel to display a near-pure black effect in the black state. The brightness of the liquid crystal display panel in the black state is almost pure black. In this way, while keeping the maximum brightness of the liquid crystal display panel unchanged, the minimum brightness of the liquid crystal display panel can be reduced, thereby improving the contrast of the liquid crystal display panel.

[0133] In the various method embodiments of this disclosure, the sequence numbers of each step are not intended to limit the order of the steps. For those skilled in the art, any changes in the order of the steps are within the scope of protection of this disclosure without any creative effort.

[0134] It should be noted that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, since the embodiments are basically similar to the product embodiments, the descriptions are relatively simple, and the relevant parts can be referred to the descriptions of the product embodiments.

[0135] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0136] It is understandable that when a component such as a layer, film, region, or substrate is referred to as being "above" or "below" another component, the component may be "directly" located "above" or "below" the other component, or there may be intermediate components present.

[0137] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0138] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display substrate, characterized by, include: Substrate; The driving circuit layer is located on the substrate. The first electrode is located on the substrate. An insulating layer located on the side of the first electrode away from the substrate; The second electrode is located on the side of the insulating layer away from the substrate. The second electrode comprises a plurality of spaced strip electrodes and is made of an opaque metal material.

2. The display substrate of claim 1, wherein, The first electrode is a planar common electrode, and the first electrode is made of a light-transmitting conductive material; the second electrode is a pixel electrode.

3. The display substrate of claim 1, wherein, The first electrode is a planar pixel electrode, and the first electrode is made of a light-transmitting conductive material; the second electrode is a common electrode.

4. The display substrate of claim 3, wherein, The driving circuit layer includes data lines and gate lines, and the orthographic projections of the data lines and the gate lines on the substrate are located within the orthographic projection of the common electrode on the substrate.

5. The display substrate of claim 1, wherein, The driving circuit layer includes a pattern of source and drain metal layers, and the second electrode is disposed in the same layer and with the same material as the pattern of the source and drain metal layers. 6.The display substrate of claim 5, wherein, The driving circuit layer also includes a pattern of a gate metal layer, and the first electrode is disposed on the same layer as the pattern of the gate metal layer.

7. The display substrate according to any one of claims 1-6, wherein, The thickness of the second electrode is 350-1000 angstroms.

8. The display substrate according to any one of claims 1-6, wherein, The angle between the side surface of the second electrode and the substrate is 15-45°. 9.The display substrate according to any one of claims 1-6, wherein, The width of the strip electrode is 1.5-3 micrometers.

10. A liquid crystal display panel, characterized by comprising: Includes the display substrate as described in any one of claims 1-9.

11. A display device comprising: Including the liquid crystal display panel as described in claim 10.

12. A manufacturing method of a display substrate, comprising: include: Provide a substrate; A driving circuit layer is formed on the substrate. A first electrode is formed on the substrate. An insulating layer is formed on the side of the first electrode away from the substrate. A second electrode is formed on the side of the insulating layer away from the substrate. The second electrode comprises a plurality of spaced strip electrodes and is made of an opaque metal material.

13. The manufacturing method of the display substrate according to claim 12, characterized in that, Forming the first electrode includes: The first electrode is formed using a light-transmitting and conductive material.

14. The manufacturing method of the display substrate according to claim 12, characterized in that, The driving circuit layer includes a pattern of source and drain metal layers, and the formation of the second electrode includes: The source / drain metal layer and the second electrode are formed through a single patterning process.

15. The manufacturing method of the display substrate according to claim 12, characterized in that, The driving circuit layer further includes a pattern of a gate metal layer, forming the first electrode as follows: The first electrode is formed in the same layer as the pattern of the gate metal layer.

Images