CN111308788B - Liquid crystal display panel - Google Patents
Liquid crystal display panel Download PDFInfo
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- CN111308788B CN111308788B CN202010328105.5A CN202010328105A CN111308788B CN 111308788 B CN111308788 B CN 111308788B CN 202010328105 A CN202010328105 A CN 202010328105A CN 111308788 B CN111308788 B CN 111308788B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a liquid crystal display panel, which comprises a liquid crystal box and a backlight module, wherein the liquid crystal box and the backlight module are superposed and combined into a whole; the backlight module comprises a bottom plate, a light emitting chip array and a reticular light condensing component, wherein the light emitting chip array is arranged on the bottom plate and comprises at least four light emitting chips which are arranged in a two-dimensional array; the reticular light-gathering component is provided with at least four meshes which are arranged in a two-dimensional array, and the reticular light-gathering component is sleeved on the light-emitting chip array. The invention can make the brightness of the picture displayed by the liquid crystal display panel uniform.
Description
Technical Field
The invention relates to the field of display, in particular to a liquid crystal display panel.
Background
A conventional liquid crystal display panel generally includes a liquid crystal cell and a backlight module including an array of light emitting chips (e.g., LED chips). The light emitting chip array is used for providing a light source for the liquid crystal box.
The inventor finds that: the brightness of the light received by the liquid crystal cell provided by the backlight module is different in different areas, and specifically, at the position of the liquid crystal cell corresponding to the light emitting chips in the light emitting chip array, the brightness of the light received by the liquid crystal cell is greater than the brightness of the light received by the liquid crystal cell at the position of the gap between two adjacent light emitting chips in the light emitting chip array. This may cause the image displayed on the liquid crystal display panel to have uneven brightness.
Therefore, a new technical solution is needed to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a liquid crystal display panel, which can make the brightness of a picture displayed by the liquid crystal display panel uniform.
In order to solve the problems, the technical scheme of the invention is as follows:
a liquid crystal display panel comprises a liquid crystal box and a backlight module, wherein the liquid crystal box and the backlight module are superposed and combined into a whole; the liquid crystal box comprises a first polarizing plate, a color film substrate, a liquid crystal layer, a thin film transistor array substrate and a second polarizing plate, wherein the color film substrate and the thin film transistor array substrate are superposed and combined into a whole; the thin film transistor array substrate comprises a first substrate, a scanning line, a data line, a thin film transistor, a pixel electrode and a driving circuit, and the color film substrate comprises a second substrate, a color film layer, a black matrix layer and a common electrode layer; the first polarizing plate is provided with a first polarizing axis, the second polarizing plate is provided with a second polarizing axis, the first polarizing axis and the second polarizing axis are perpendicular to each other, the first polarizing plate is arranged on the surface of the thin film transistor array substrate, which faces away from the color film substrate, and the second polarizing plate is arranged on the surface of the color film substrate, which faces away from the thin film transistor array substrate; the backlight module comprises a bottom plate, a light emitting chip array and a reticular light condensing component, wherein the light emitting chip array is arranged on the bottom plate and comprises at least four light emitting chips which are arranged in a two-dimensional array; the reticular light-gathering component is provided with at least four meshes which are arranged in a two-dimensional array, and the reticular light-gathering component is sleeved on the light-emitting chip array.
In the above liquid crystal display panel, the mesh light condensing member includes a light reflecting substrate and a transparent light condensing member, and the transparent light condensing member is stacked on the light reflecting substrate.
In the above liquid crystal display panel, the reflective substrate and the transparent light-gathering member are both mesh-shaped.
In the above liquid crystal display panel, the backlight module further includes a supporting member, the supporting member is disposed on the bottom surface of the reflective substrate, one end of the supporting member is disposed on the bottom plate, and the other end of the supporting member is connected to the bottom surface of the light emitting chip.
In the above liquid crystal display panel, the reflective substrate has a reflective surface, and the reflective surface is located below the light-emitting surface of the light-emitting chip in a direction perpendicular to the plane corresponding to the backlight module.
In the above liquid crystal display panel, the bottom surface of the transparent light gathering member is a plane, the top surface of the transparent light gathering member is a convex curved surface, and the bottom surface of the transparent light gathering member is disposed on the light reflecting substrate.
In the above liquid crystal display panel, the light reflecting surface of the light reflecting substrate is provided in a concave-convex shape.
In the above liquid crystal display panel, the light-reflecting substrate is used for reflecting the light emitted by the light-emitting chip to the convex curved surface of the transparent light-gathering member.
In the liquid crystal display panel, the transparent light gathering member is used for gathering the light reflected by the light reflecting substrate and emitting the light to a position corresponding to a gap between the liquid crystal box and two adjacent light emitting chips.
In the above liquid crystal display panel, at least a part of the light emitting chip passes through the mesh.
In the invention, the backlight module comprises a bottom plate, a light emitting chip array and a reticular light condensing member, wherein the reticular light condensing member is provided with at least four meshes which are arranged in a two-dimensional array, and the reticular light condensing member is sleeved on the light emitting chip array. Therefore, the mesh-shaped light-gathering component can gather part of received light emitted by the light-emitting chips to the gap between two adjacent light-emitting chips and emit the light, so that the difference between the brightness of the part of the backlight module corresponding to the light-emitting chips and the brightness of the part of the backlight module corresponding to the gap between the backlight module and the two adjacent light-emitting chips can be reduced, the brightness of the picture displayed by the liquid crystal display panel is uniform, and the phenomenon of starry sky is avoided.
In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic diagram of a liquid crystal display panel according to an embodiment of the invention.
FIG. 2 is a partial schematic view of a backlight module in the LCD panel shown in FIG. 1.
FIG. 3 is a schematic view of a portion of the mesh light-gathering member in the backlight module shown in FIG. 2.
Detailed Description
As shown in fig. 1 to fig. 3, the liquid crystal display panel according to the embodiment of the invention includes a liquid crystal cell 102 and a backlight module 101, and the liquid crystal cell 102 and the backlight module 101 are stacked and combined into a whole.
The liquid crystal cell 102 includes a first polarizing plate, a color film substrate, a liquid crystal layer, a thin film transistor array substrate, and a second polarizing plate, wherein the color film substrate and the thin film transistor array substrate are stacked and combined into a whole.
The thin film transistor array substrate comprises a first substrate, a scanning line, a data line, a thin film transistor, a pixel electrode and a driving circuit, and the color film substrate comprises a second substrate, a color film layer, a black matrix layer and a common electrode layer. The driving circuit comprises a time sequence control circuit, a scanning driving circuit and a data driving circuit, wherein the time sequence control circuit is connected with the scanning driving circuit and the data driving circuit, the scanning driving circuit is connected with the scanning lines, and the data driving circuit is connected with the data lines.
The first polarizing plate is provided with a first polarizing axis, the second polarizing plate is provided with a second polarizing axis, the first polarizing axis and the second polarizing axis are perpendicular to each other, the first polarizing plate is arranged on the surface of the thin film transistor array substrate, which faces away from the color film substrate, and the second polarizing plate is arranged on the surface of the color film substrate, which faces away from the thin film transistor array substrate.
The backlight module 101 comprises a base plate 1011, a light emitting chip array and a reticular light condensing member 1013, wherein the light emitting chip array is arranged on the base plate 1011, the light emitting chip array comprises at least four light emitting chips 1012, and the at least four light emitting chips 1012 are arranged in a two-dimensional array.
The reticular light-gathering member 1013 is provided with at least four meshes which are arranged in a two-dimensional array, and the reticular light-gathering member 1013 is sleeved on the light-emitting chip array.
At least a portion of the light emitting chips 1012 pass through the mesh.
The reticular light-gathering member 1013 comprises a light-reflecting substrate 10131 and a transparent light-gathering member 10132, wherein the transparent light-gathering member 10132 is stacked on the light-reflecting substrate 10131.
The reflective substrate 10131 and the transparent condensing member 10132 are both net-shaped.
The backlight module 101 further comprises a supporting member 1014, the supporting member 1014 is disposed on the bottom surface of the reflective substrate 10131, one end of the supporting member 1014 is disposed on the bottom plate 1011, and the other end of the supporting member 1014 is connected to the bottom surface of the mesh-shaped light-emitting sheet.
The reflective substrate 10131 has a reflective surface, and the reflective surface is located below the light emitting surface of the light emitting chip 1012 in a direction perpendicular to the plane corresponding to the backlight module 101.
The top surface of the transparent light gathering member 10132 is a convex curved surface, and the bottom surface of the transparent light gathering member 10132 is disposed on the reflective substrate 10131.
The light reflecting surface of the light reflecting substrate 10131 is provided in a concave-convex shape. That is, the light-reflecting surface is a diffuse reflection surface.
The light reflecting substrate 10131 is used for reflecting the light emitted by the light emitting chip 1012 to the convex curved surface of the transparent light gathering member 10132.
The transparent light gathering member 10132 is used for gathering the light reflected by the light reflecting substrate 10131 and emitting the light to a position corresponding to a gap between the liquid crystal cell 102 and two adjacent light emitting chips 1012.
The transparent light gathering member 10132 in a net shape comprises a plurality of strip-shaped light gathering strips, and the light gathering strips are connected end to form the transparent light gathering member 10132 in a net shape.
The light emitting chip array is formed by splicing a plurality of splicing plates, each splicing plate is provided with a sub-driving circuit and a plurality of light emitting chips 1012, each splicing plate comprises a middle area and an edge area, and the radian of the convex curved surface of the transparent light gathering piece 10132 positioned in the middle area is larger than or smaller than the radian of the convex curved surface of the transparent light gathering piece 10132 positioned in the edge area.
Preferably, the radian of the convex curved surface of the transparent light gathering member 10132 increases or decreases in a direction from the edge region of the splice plate to the center of the splice plate.
Preferably, the light reflecting surface of the light reflecting substrate 10131 is concave or convex, and the concave or convex light reflecting surface includes a first inclined surface 101311 and a second inclined surface 101312, the first inclined surface 101311 is close to the middle region, and the second inclined surface 101312 is far from the middle region. The first inclined surface 101311 and the second inclined surface 101312 have an included angle. The bottom surface of the transparent light gathering member 10132 is coupled to the first inclined surface 101311 and the second inclined surface. The first inclined surface 101311 and the second inclined surface 101312 are used for reflecting more light rays to the transparent light gathering member 10132.
Preferably, the included angle between the first inclined surface 101311 and the second inclined surface 101312 increases or decreases in a direction from the edge region of the splice plate to the center of the splice plate.
The distance between the bottom surface of the reflective substrate 10131 located at the edge region and the bottom plate 1011 is greater or less than the distance between the bottom surface of the reflective substrate 10131 located at the central region and the bottom plate 1011.
Preferably, the distance between the bottom surface of the light reflecting substrate 10131 and the bottom plate 1011 increases or decreases from the edge region of the splice plate to the center of the splice plate.
The support member 1014 in the splice bar is a wire with the light emitting chip 1012 and the sub-driver circuit. The width of the supporting member 1014 located near the sub driving circuit (including the scan sub driving circuit and the data sub driving circuit) is equal to the width of the supporting member 1014 located far from the sub driving circuit, and the height of the supporting member 1014 located near the sub driving circuit is smaller than the height of the supporting member 1014 located far from the sub driving circuit. That is, the resistance of the wire located far away from the sub-driving circuit is smaller than that of the wire located near the sub-driving circuit, so that the resistance-capacitance delay (RC delay) can be reduced, and the uniformity of the light emission of the splice board can be improved. Therefore, in a direction perpendicular to the plane corresponding to the backlight module 101, the light reflecting surface of the light reflecting substrate 10131 located away from the sub-driving circuit is closer to the light emitting surface of the light emitting chip 1012 than the light reflecting surface of the light reflecting substrate 10131 located close to the sub-driving circuit.
The light reflecting substrate 10131 comprises at least three transparent film layers with different refractive indexes, wherein the transparent film layers with different refractive indexes are superposed and combined into a whole, namely, at least three transparent film layers form a Bragg reflector. The transparent film layers which are overlapped and combined into a whole and have at least three different refractive indexes are used for reflecting light rays irradiated to at least three film layers to the transparent light gathering part 10132.
Alternatively, the material of the light reflecting substrate 10131 is a metal. An insulating layer is disposed between the light emitting substrate and the support member 1014. The edge of the light reflecting substrate 10131 is provided with an extension, the extension extends from a position far away from the bottom plate 1011 to a direction close to the position of the bottom plate 1011 at the edge of the light reflecting substrate 10131, the extension is a sheet metal, and the sheet metal is used for shielding the interference of the light emitting chip 1012 to the support member 1014 (wire). A dielectric layer is disposed between the extension and the side of the support member 1014.
In a direction perpendicular to the plane corresponding to the backlight module 101, a height of a vertex of the transparent light gathering member 10132 is greater than a height of a vertex of the light emitting chip 1012. This may enable the transparent light collector 10132 to receive more light from the light emitting chip 1012.
In the invention, the backlight module comprises a bottom plate, a light emitting chip array and a reticular light condensing member, wherein the reticular light condensing member is provided with at least four meshes which are arranged in a two-dimensional array, and the reticular light condensing member is sleeved on the light emitting chip array. Therefore, the mesh-shaped light-gathering component can gather part of received light emitted by the light-emitting chips to the gap between two adjacent light-emitting chips and emit the light, so that the difference between the brightness of the part of the backlight module corresponding to the light-emitting chips and the brightness of the part of the backlight module corresponding to the gap between the backlight module and the two adjacent light-emitting chips can be reduced, the brightness of the picture displayed by the liquid crystal display panel is uniform, and the phenomenon of starry sky is avoided.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (9)
1. A liquid crystal display panel comprises a liquid crystal box and a backlight module, wherein the liquid crystal box and the backlight module are superposed and combined into a whole;
the liquid crystal box comprises a first polarizing plate, a color film substrate, a liquid crystal layer, a thin film transistor array substrate and a second polarizing plate, wherein the color film substrate and the thin film transistor array substrate are superposed and combined into a whole;
the thin film transistor array substrate comprises a first substrate, a scanning line, a data line, a thin film transistor, a pixel electrode and a driving circuit, and the color film substrate comprises a second substrate, a color film layer, a black matrix layer and a common electrode layer;
the first polarizing plate is provided with a first polarizing axis, the second polarizing plate is provided with a second polarizing axis, the first polarizing axis and the second polarizing axis are perpendicular to each other, the first polarizing plate is arranged on the surface of the thin film transistor array substrate, which faces away from the color film substrate, and the second polarizing plate is arranged on the surface of the color film substrate, which faces away from the thin film transistor array substrate;
the method is characterized in that:
the backlight module comprises a bottom plate, a light emitting chip array and a reticular light condensing component, wherein the light emitting chip array is arranged on the bottom plate and comprises at least four light emitting chips which are arranged in a two-dimensional array;
the reticular light-gathering component is provided with at least four meshes which are arranged in a two-dimensional array form, and the reticular light-gathering component is sleeved on the light-emitting chip array;
the reticular light-gathering member comprises a light-reflecting substrate and a transparent light-gathering piece, and the transparent light-gathering piece is stacked on the light-reflecting substrate.
2. The lcd panel of claim 1, wherein the light reflecting substrate and the transparent light collector are both mesh-shaped.
3. The lcd panel of claim 1, wherein the backlight module further comprises a supporting member disposed on a bottom surface of the light-reflecting substrate, one end of the supporting member is disposed on the bottom plate, and the other end of the supporting member is connected to a bottom surface of the light-emitting chip.
4. The liquid crystal display panel of claim 1, wherein the light-reflecting substrate has a light-reflecting surface, and the light-reflecting surface is located below the light-emitting surface of the light-emitting chip in a direction perpendicular to the plane corresponding to the backlight module.
5. The liquid crystal display panel of claim 1, wherein the bottom surface of the transparent light gathering member is a flat surface, the top surface of the transparent light gathering member is a convex curved surface, and the bottom surface of the transparent light gathering member is disposed on the light reflecting substrate.
6. The liquid crystal display panel according to claim 4, wherein the light reflecting surface of the light reflecting substrate is provided in a concave-convex shape.
7. The LCD panel of claim 6, wherein the light-reflecting substrate is used for reflecting the light emitted from the light-emitting chips to the convex curved surface of the transparent light-gathering member.
8. The panel according to claim 7, wherein the transparent light gathering member is used to gather the light reflected by the reflective substrate and emit the gathered light to a position corresponding to a gap between the liquid crystal cell and two adjacent light emitting chips.
9. The liquid crystal display panel according to claim 1, wherein at least a part of the light emitting chip penetrates the mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010328105.5A CN111308788B (en) | 2020-04-23 | 2020-04-23 | Liquid crystal display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010328105.5A CN111308788B (en) | 2020-04-23 | 2020-04-23 | Liquid crystal display panel |
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| CN111308788A CN111308788A (en) | 2020-06-19 |
| CN111308788B true CN111308788B (en) | 2020-12-25 |
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| CN111999936B (en) | 2020-08-27 | 2021-04-27 | 深圳市华星光电半导体显示技术有限公司 | Backlight module and display device |
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| US9341766B2 (en) * | 2010-06-15 | 2016-05-17 | Sharp Kabushiki Kaisha | Lighting device, display device and television device |
| JP5449274B2 (en) * | 2011-03-25 | 2014-03-19 | シャープ株式会社 | Lighting device and display device |
| CN105333334A (en) * | 2015-11-16 | 2016-02-17 | 合一智能科技（深圳）有限公司 | LED light bar and liquid crystal display module |
| CN108572481B (en) * | 2018-03-08 | 2021-10-26 | 厦门天马微电子有限公司 | Backlight module and display device |
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