CN114415417B - Display panel and display device - Google Patents
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- CN114415417B CN114415417B CN202210179469.0A CN202210179469A CN114415417B CN 114415417 B CN114415417 B CN 114415417B CN 202210179469 A CN202210179469 A CN 202210179469A CN 114415417 B CN114415417 B CN 114415417B
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Classifications
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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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
-
- 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
- G02F1/133504—Diffusing, scattering, diffracting elements
Abstract
The invention discloses a display panel and a display device, wherein the display panel comprises a liquid crystal dimming panel and a liquid crystal display panel which are sequentially laminated in the light emitting direction perpendicular to the plane of the display panel; the liquid crystal dimming panel comprises a first shading layer, and the liquid crystal display panel comprises a second shading layer; the first light shielding layer comprises a plurality of first repeating units in a setting plane of the first light shielding layer; in the setting plane of second shading layer, the second shading layer includes a plurality of second repeating units, and the repetition period T1 of first repeating unit and the repetition period T2 of second repeating unit satisfy |T1-T2|/T1 and be less than or equal to 10%, through setting up the scattering layer between the first shading layer of display panel and second shading layer, break up light, break up the similar periodic space frequency of first shading layer and second shading layer, reduce and produce the interference line, avoid producing the mole line, play the effect that improves display panel's display effect.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.
Background
In the prior art, the periodic structures exist in the upper and lower screens of the display panel with the double-layer liquid crystal box structure, so that interference lines, namely mole lines, are easily generated, the contrast ratio of a display picture is reduced, and the display effect of the display panel is affected.
Disclosure of Invention
The invention provides a display panel and a display device, which can reduce the interference effect of light paths between double-layer liquid crystal box structures, reduce moire and improve the display effect of the display panel.
In a first aspect, an embodiment of the present invention provides a display panel, where the display panel includes a liquid crystal dimming panel and a liquid crystal display panel sequentially stacked in a light emitting direction perpendicular to a plane where the display panel is located;
the liquid crystal dimming panel comprises a first shading layer, and the liquid crystal display panel comprises a second shading layer; in a setting plane of the first light shielding layer, the first light shielding layer includes a plurality of first repeating units; in the setting plane of the second light shielding layer, the second light shielding layer comprises a plurality of second repeating units, and the repeating period T1 of the first repeating units and the repeating period T2 of the second repeating units meet the condition that |T1-T2|/T1 is less than or equal to 10%;
the display panel further includes a diffusion layer between the first light shielding layer and the second light shielding layer.
In a second aspect, an embodiment of the present invention further provides a display apparatus, where the display apparatus includes the display panel provided in the first aspect.
The display panel provided by the embodiment of the invention comprises a liquid crystal dimming panel and a liquid crystal display panel which are sequentially laminated in the light emitting direction perpendicular to the plane of the display panel; the liquid crystal dimming panel comprises a first shading layer, and the liquid crystal display panel comprises a second shading layer; the first light shielding layer comprises a plurality of first repeating units in a setting plane of the first light shielding layer; in the setting plane of second shading layer, the second shading layer includes a plurality of second repeating units, and the repetition period T1 of first repeating unit and the repetition period T2 of second repeating unit satisfy |T1-T2|/T1 and be less than or equal to 10%, through setting up the scattering layer between the first shading layer that display panel still and second shading layer, break up light, break up the similar periodic space frequency of first shading layer and second shading layer, reduce and produce the interference line, avoid producing the mole line, play the effect that improves display panel's display effect.
Drawings
Fig. 1 is a schematic structural diagram of a display panel provided in the prior art;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 4 is another schematic cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 5 is another schematic cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 6 is another schematic cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 7 is another cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 8 is another cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 9 is another cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 10 is another cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 11 is another cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 12 is another cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 13 is another cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 14 is another cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 15 is another cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 16 is another cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 17 is another cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 18 is another cross-sectional view taken along the direction AA' of FIG. 2;
FIG. 19 is a schematic view of a scattering layer according to an embodiment of the present invention;
fig. 20 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of a display panel according to the prior art. As shown in fig. 1, the display panel 100 includes a liquid crystal dimming panel 10 and a liquid crystal display panel 11 sequentially stacked in a light emitting direction (as shown in a Y direction in the drawing) perpendicular to a plane in which the display panel is located; the liquid crystal dimming panel 10 includes a first light shielding layer 101, and the liquid crystal display panel includes a second light shielding layer 201; in the arrangement plane of the first light shielding layer 101, the first light shielding layer 101 includes a plurality of first repeating units 1011; in the arrangement plane of the second light shielding layer 201, the second light shielding layer 201 includes a plurality of second repeating units 2011. The first repeating unit 1011 may be constituted by a light shielding structure located in the first light shielding layer 101, as shown in fig. 1; the first repeating unit 1011 may be constituted by one light shielding structure located in the first light shielding layer 101 and one non-light shielding region located on the left or right side of the light shielding structure between the two light shielding structures. Because of the periodic structures such as metal wiring, color resistance and the like in the upper display screen and the lower display screen of the double-screen liquid crystal display product, X1 is respectively used&X2 represents a vibration waveform of light emitted from the display panel through the first repeating unit 1011 in the liquid crystal dimming panel 10 and the second repeating unit 2011 in the liquid crystal display panel 11, w 1 And w 2 Representing spatial frequency, X1&X2 satisfies the vibration waveform of the cosine wave, wherein:
X 1 ＝Acos(w 1 t)；
t 2 ＝Acos(w 2 t)；
the spatial frequency refers to the product of the directional cosine of the plane wave vector and the reciprocal of the wavelength of the light. Between two periodic objects with similar spatial frequencies, the peaks of the sine waves are easy to interfere after being overlapped to generate interference lines, namely mole lines, when the periodic arrangement of the first repeating unit 1011 and the second repeating unit 2011 is close, the spatial frequency difference is smaller, namely w 2 -w 1 ＜＜w 2 +w 1 The superimposed vibration waveform is denoted by X, wherein:
then:
wherein, A and A' are constants, t is interference time, because the vibration waveform X after superposition still satisfies the vibration waveform of cosine wave, produces interference lines, forms the latticed when the display panel has interference in horizontal (as shown in X direction in the figure) and vertical (as shown in Y direction in the figure) directions, has reduced the contrast of display panel display picture, influences the display effect of display panel.
Based on the technical problems, the inventor researches and discovers that the destruction of the periodic space frequency is a key for reducing the interference lines and avoiding the generation of the mole lines. Based on the above, the inventors further studied the technical scheme of the embodiment of the present invention. Specifically, the embodiment of the invention provides a display panel which comprises a liquid crystal dimming panel and a liquid crystal display panel which are sequentially laminated in the light emitting direction perpendicular to the plane of the display panel; the liquid crystal dimming panel comprises a first shading layer, and the liquid crystal display panel comprises a second shading layer; the first light shielding layer comprises a plurality of first repeating units in a setting plane of the first light shielding layer; in the setting plane of the second light shielding layer, the second light shielding layer comprises a plurality of second repeating units, and the repeating period T1 of the first repeating units and the repeating period T2 of the second repeating units meet the condition that |T1-T2|/T1 is less than or equal to 10%; the display panel further includes a diffusion layer between the first light shielding layer and the second light shielding layer.
By adopting the technical scheme, the scattering layer is arranged between the first light shielding layer and the second light shielding layer which are periodically arranged, and the periodic space frequency similar to the first light shielding layer and the second light shielding layer is broken through by the scattering layer, so that the interference superposition of vibration waveforms with similar periodic space frequency can not be met, interference lines are reduced, the generation of moire lines is avoided, and the effects of improving the contrast ratio and the display effect of the display panel are achieved.
The foregoing is the core idea of the present invention, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making any inventive effort are intended to fall within the scope of the present invention.
Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention; fig. 3 is a schematic cross-sectional view along AA' in fig. 2. As shown in fig. 2 and fig. 3, the display panel 200 according to the embodiment of the present invention includes a liquid crystal dimming panel 20 and a liquid crystal display panel 21 sequentially stacked in a light emitting direction perpendicular to a plane on which the display panel 200 is located; the liquid crystal dimming panel 20 includes a first light shielding layer 201, and the liquid crystal display panel 21 includes a second light shielding layer 211; in the arrangement plane of the first light shielding layer 201, the first light shielding layer 201 includes a plurality of first repeating units 2011; in the setting plane of the second light shielding layer 211, the second light shielding layer 211 includes a plurality of second repeating units 2111, and the repetition period T1 of the first repeating unit 2011 and the repetition period T2 of the second repeating unit 2111 satisfy |t1-t2|/t1+.10%; the display panel 200 further includes a diffusion layer 22 between the first light shielding layer 201 and the second light shielding layer 211.
Specifically, as shown in fig. 2 and 3, the display panel 200 with the double-layer liquid crystal box structure includes a liquid crystal dimming panel 20 and a liquid crystal display panel 21 which are sequentially stacked in a light emitting direction perpendicular to a plane where the display panel 200 is located, the liquid crystal display panel 21 is located on a light emitting surface of the liquid crystal dimming panel 20, and the display panel 200 also includes a backlight light source (not shown in the drawings) which is located on the light emitting surface of the backlight light source, and the backlight light source provides uniform backlight to the liquid crystal dimming panel 20. The liquid crystal dimming panel 20 comprises a plurality of sub-pixels which are arranged in an array, and the liquid crystal dimming panel 20 realizes the pixel-level fine adjustment of backlight light emission by controlling the opening degree of the sub-pixels in different areas, so that the display effect of the liquid crystal display panel is ensured.
Further, the liquid crystal dimming panel 20 includes a first light shielding layer 201, the liquid crystal display panel 21 includes a second light shielding layer 211, and the first light shielding layer 201 and the second light shielding layer 211 are periodically arranged film layers having light shielding characteristics, such as metal layers, color resists, and the like. In the arrangement plane of the first light shielding layer 201, the first light shielding layer 201 includes a plurality of first repeating units 2011, and in the arrangement plane of the second light shielding layer 211, the second light shielding layer 211 includes a plurality of second repeating units 2111. For example, the first repeating unit 2011 and the first repeating unit 2011 may be a plurality of thin film transistors (Thin Film Transistor, TFTs) in a driving circuit layer and a pixel circuit configured of the thin film transistors. The repetition period T1 of the first repetition unit 2011 and the repetition period T2 of the second repetition unit 2111 satisfy |t1-t2|/t1+.10%, which can be understood as that in the light emitting plane of the display panel, along the direction in which the repetition periods are arranged, the difference between the length of the repetition period T1 of the first repetition unit 2011 and the length of the repetition period T2 of the second repetition unit 2111 satisfies |t2|/t1+.10%, and the difference between the repetition period lengths of the first repetition unit 2011 and the second repetition unit 2111 is small, for example, the distance between two adjacent scanning lines, or the distance between two adjacent data lines, or the distance between two adjacent color resistors in the row direction or the column direction, and when the difference between the distances is small, it can be considered that the backlight light provided by the backlight source may interfere to generate moire when passing through two periodically arranged light shielding structures, respectively. In this embodiment, by disposing the scattering layer 22 between the first light shielding layer 201 and the second light shielding layer 211, the scattering layer 22 is in a haze state, the scattering layer 22 has the effect of scattering light, and the scattering layer 22 is utilized to break the periodic spatial frequency similar to that of the first light shielding layer 201 and the second light shielding layer 211, so that the light vibration waveforms of the light passing through the first light shielding layer 201 and the scattering layer 22 and the light passing through the second light shielding layer 211 do not satisfy the interference superposition condition, thereby reducing interference lines generated between the liquid crystal dimming panel 20 and the liquid crystal display panel 21, avoiding the generation of mole lines, and improving the contrast ratio and the display effect of the display panel.
In summary, the display panel provided by the embodiment of the invention comprises a liquid crystal dimming panel and a liquid crystal display panel which are sequentially stacked in the light emitting direction perpendicular to the plane of the display panel; the liquid crystal dimming panel comprises a first shading layer, and the liquid crystal display panel comprises a second shading layer; the first light shielding layer comprises a plurality of first repeating units in a setting plane of the first light shielding layer; in the setting plane of second shading layer, the second shading layer includes a plurality of second repeating units, and the repetition period T1 of first repeating unit and the repetition period T2 of second repeating unit satisfy |T1-T2|/T1 and be less than or equal to 10%, through setting up the scattering layer between the first shading layer of periodically arranging and second shading layer, utilize the scattering layer to break the close periodic space frequency of first shading layer and second shading layer, make it unable to satisfy the close vibration waveform interference stack of periodic space frequency, thereby reduce and produce the interference line, avoid producing mole line, play the effect that improves display panel's contrast and display effect.
Alternatively, FIG. 4 is another schematic cross-sectional view taken along the direction AA' in FIG. 2; FIG. 5 is another schematic cross-sectional view taken along the direction AA' of FIG. 2; FIG. 6 is another schematic cross-sectional view taken along the direction AA' of FIG. 2; FIG. 7 is another cross-sectional view taken along the direction AA' of FIG. 2; FIG. 6 is another schematic cross-sectional view taken along the direction AA' of FIG. 2; FIG. 8 is another cross-sectional view taken along the direction AA' of FIG. 2; FIG. 9 is another cross-sectional view taken along the direction AA' of FIG. 2; FIG. 10 is another cross-sectional view taken along the direction AA' of FIG. 2; FIG. 11 is another cross-sectional view taken along the direction AA' of FIG. 2; fig. 12 is another schematic cross-sectional view along AA' in fig. 2. As shown in fig. 4 to 12, the liquid crystal dimming panel 20 further includes a first pixel circuit 202, and the first pixel circuit 202 includes a plurality of first metal line layers 2022; the liquid crystal display panel 21 further includes a second pixel circuit 212 and a second color film substrate 216, the second pixel circuit 212 includes a plurality of second metal line layers 2122, and the second color film substrate 216 includes a light shielding structure 2162; the first light shielding layer 201 includes at least one of a plurality of first metal line layers 2022, and the second light shielding layer 211 includes at least one of a plurality of second metal line layers 2122 and/or a light shielding structure 2162.
Specifically, as shown in fig. 4-12, the liquid crystal dimming panel 20 further includes a buffer layer 205 and a driving circuit layer 40 sequentially disposed on one side of the first array substrate 204, the first array substrate 204 may be flexible or rigid, for example, formed of any suitable insulating material having flexibility for blocking oxygen and moisture and preventing moisture or impurities from diffusing into the liquid crystal dimming display panel 20 through the first array substrate 204, the buffer layer 205 may cover the entire upper surface of the first array substrate 204, the driving circuit layer 40 may include a plurality of first thin film transistors 30 (Thin Film Transistor, TFTs) periodically arranged and a first pixel circuit 202 formed of the first thin film transistors 30, and the first pixel circuit 202 is used for driving the liquid crystal in the first liquid crystal layer 203 to deflect to form dimming picture information. The first pixel circuit 202 includes a plurality of first metal line layers 2022, and exemplary, as shown in fig. 4 to 12, the structure of the driving circuit layer 40 of the liquid crystal dimming panel 20 includes a gate layer 31 on the buffer layer 205, a gate insulating layer 311 on the gate layer 31, an active layer 32 on the gate insulating layer 311, an interlayer insulating layer 312 on the active layer 32, a source electrode 33 and a drain electrode 34 on the interlayer insulating layer 312, the source electrode 33 and the drain electrode 34 are electrically connected (or bonded) to the source region and the drain region through contact holes, respectively, a planarization layer 313 on the source electrode 33 and the drain electrode 34 of the first thin film transistor 30, a pixel electrode 50 on the planarization layer 313, and a pixel electrode insulating layer 314 on the pixel electrode 50. The gate insulating layer 311, the interlayer insulating layer 312, and the pixel electrode insulating layer 314 may be formed of an inorganic insulating layer such as silicon oxide or silicon nitride, and the planarization layer 313 may be formed of an organic insulating layer, and the structures and preparation materials of the further driving circuit layer 40 are not further listed here. Wherein the multi-layered first metal line layer 2022 includes at least one of the gate layer 31, the source electrode 33, the drain electrode 34, and the pixel electrode 50. Only two first thin film transistors 30 are shown, and more first thin film transistor 30 structures are not shown here.
It will be understood that the structure of the film layer of the liquid crystal display panel 21 is similar to that of the liquid crystal dimming panel 20, the liquid crystal display panel 21 further includes a second array substrate 214, a buffer layer 215 and a driving circuit layer 40 'sequentially disposed on one side of the second array substrate 214, the driving circuit layer 40' may include a plurality of periodically arranged second thin film transistors 30 'and a second pixel circuit 212 formed by the second thin film transistors 30', the second pixel circuit 212 is used for driving the second liquid crystal layer 213, as illustrated in fig. 4-12, the structure of the driving circuit layer 40 'of the liquid crystal display panel 21 includes a gate electrode 31', a gate insulating layer 311', an active layer 32', an interlayer insulating layer 312 'sequentially disposed on the buffer layer 215, and a source electrode 33' and a drain electrode 34 'disposed on the interlayer insulating layer 312', which are electrically connected (or combined) to the source electrode region and the drain electrode region through a contact hole, respectively, the second thin film transistor 212 is used for driving the second liquid crystal layer 213, and the pixel electrode 33 'and the driving circuit layer 40' may be further planarized by forming a gate electrode 313 'and a further planarized pixel electrode layer 50' on the insulating layer 313 'or a further insulating layer 313' on the pixel layer 50 'formed by using the bottom gate insulating layer 30' as an example shown in fig. 4-12. Wherein the multi-layered second metal line layer 2022 includes at least one of the gate layer 31', the source electrode 33', the drain electrode 34', and the pixel electrode 50'. Only two second thin film transistors 30 'are shown, and more second thin film transistor 30' structures are not shown here.
The liquid crystal display panel 21 further includes a second color film substrate 216, where the second color film substrate 216 includes a color resistor 2161 and a light shielding structure 2162 disposed between two adjacent color resistors 2161, and the light shielding structure 2162 includes a Black Matrix (BM) for shielding light between the two adjacent color resistors 2161 and preventing light crosstalk. In a plane perpendicular to the light emitting direction of the display panel, the plurality of first metal line layers 2022, the plurality of second metal line layers 2122 and the light shielding structure 2162 are generally arranged periodically, and the first light shielding layer 201 includes at least one of the plurality of first metal line layers 2022, and the second light shielding layer 211 includes at least one of the plurality of second metal line layers 2122 and/or the light shielding structure 2162 when a difference between a length of a repetition period of the at least one of the plurality of second metal line layers 212 and a length of a repetition period of the at least one of the plurality of first metal line layers 2022 is small. It can be appreciated that the backlight light passing through at least one of the first metal line layers 2022 and the backlight light passing through at least one of the second metal line layers 2122 generate a vibration waveform to be superimposed, forming an interference pattern; alternatively, the backlight light passing through at least one metal layer of the plurality of first metal line layers 2022 and the backlight light passing through the light shielding structure 2162 generate a vibration waveform superposition to form interference patterns; or, the backlight light passing through at least one metal layer of the plurality of first metal line layers 2022 and the backlight light passing through at least one layer of the plurality of second metal line layers 2122 and the light shielding structure 2162 generate vibration waveforms to be superimposed, so as to form interference patterns, and since the light-emitting vibration waveforms of the display panel 200 interfere with the superposition, the mole patterns are formed, and the contrast ratio and the display effect of the display panel are reduced.
It should be noted that the display panel 200 further includes other film layers to cooperate to realize a screen display, which is not further illustrated herein.
In fig. 4 to 12, the liquid crystal dimming panel 20 and the liquid crystal display panel 21 are shown in a non-contact form for explaining the structure of the liquid crystal dimming panel 20 and the liquid crystal display panel 21 and for displaying reference numerals, respectively, and the structure is not limited to the actual structure of the display panel, but the liquid crystal dimming panel 20 and the liquid crystal display panel 21 in the actual structure are arranged in a stacked contact manner. In the following related drawings, the liquid crystal dimming panel 20 and the liquid crystal display panel 21 are shown in a non-contact form for the purpose of illustrating the structures of the liquid crystal dimming panel 20 and the liquid crystal display panel 21 and for the convenience of displaying reference numerals, and will not be described later.
4-12, the first light shielding layer 201 includes at least one of a plurality of first metal line layers 2022, and the second light shielding layer 211 includes at least one of a plurality of second metal line layers 2122; the display panel 200 further includes a first film layer 60 and a first substrate 70 between the first light shielding layer 201 and the second light shielding layer 211, the first film layer 60 is located at a side of the first metal line layer 2022 near the liquid crystal display panel 21, and the first substrate 70 is located at a side of the first film layer 60 near the second metal line layer 2122; the scattering layer 22 multiplexes the first film layer 60 and/or the first base substrate 70.
Specifically, as shown in connection with fig. 4 to 12, when the difference between the length of the repetition period of at least one metal layer of the plurality of second metal line layers 212 and the length of the repetition period of at least one metal layer of the plurality of first metal line layers 2022 is small, the second light-shielding layer 211 includes at least one layer of the plurality of second metal line layers 2122. For example, in combination with fig. 3, the first repeating unit 2011 may be a first thin film transistor 30 periodically arranged to form the first pixel circuit 202, and the second repeating unit 2111 may be a second thin film transistor 30' periodically arranged to form the second pixel circuit 212; alternatively, the first repeating unit 2011 may be the pixel electrode 50' of the liquid crystal display panel 21 and the second repeating unit 2111 may be the pixel electrode 50 of the liquid crystal dimming panel 20. As shown in the Y direction in the drawing, the display panel 200 further includes the first film layer 60 and the first base substrate 70 between the first light shielding layer 201 and the second light shielding layer 211, and illustratively, in the liquid crystal dimming panel 20, as shown in connection with fig. 4 to 12, the first film layer 60 may include at least one insulating layer among the gate insulating layer 311, the interlayer insulating layer 312, the planarization layer 313, the pixel electrode insulating layer 314, the gate insulating layer 311', the interlayer insulating layer 312', and the planarization layer 313 '. The liquid crystal dimming panel 20 may further include a first color film substrate 206, the liquid crystal display panel 21 may further include a second array substrate 212, the first color film substrate 206 includes a first color film substrate 2061, the second array substrate 212 includes a second array substrate 214, the first substrate 70 may include the first color film substrate 2061 in the liquid crystal dimming panel 20 and the second array substrate 214 of the liquid crystal display panel 21, and the diffusion layer 22 may multiplex at least one of the gate insulating layer 311, the interlayer insulating layer 312, the planarization layer 313, the pixel electrode insulating layer 314, the gate insulating layer 311', the interlayer insulating layer 312', and the planarization layer 313', and/or at least one of the first color film substrate 2061 and the second array substrate 214. The first light shielding layer 201 may be the gate layer 31, the second light shielding layer 211 may be at least one of the plurality of second metal line layers 2122, and the scattering layer 22 multiplexes the interlayer insulating layer 312 as shown in fig. 4; as shown in fig. 5, the scattering layer 22 multiplexes the planarization layer 313; as shown in fig. 6, the scattering layer 22 multiplexes the pixel electrode insulating layer 314; as in fig. 7, the scattering layer 22 multiplexes the first color film substrate 2061; as in fig. 8, the scattering layer 22 multiplexes the second array substrate 214; as in fig. 9, the scattering layer 22 multiplexes the planarization layer 313, the first color film substrate 2061, and the second array substrate 214; or the second light shielding layer 211 is at least one of the source electrode 33', the drain electrode 34' and the pixel electrode 50 'in the plurality of second metal line layers 2122, that is, may be any one or more of the second metal line layers 2122, as shown in fig. 10, the scattering layer 22 may multiplex the gate insulating layer 311'; or the second light shielding layer 211 is the pixel electrode 50' in the multi-layer second metal line layer 2122, as shown in fig. 11 and 12, the scattering layer 22 may multiplex at least one layer of the interlayer insulating layer 312' and the planarization layer 313', and by flexibly multiplexing the first film layer 60 as the scattering layer 22, the interference superposition of the regular periodic optical paths between the multi-layer first metal line layer 2022 and the multi-layer second metal line layer 2122 is broken by using the scattering layer 22, so as to reduce the generation of moire, and improve the contrast and the display effect of the display panel.
Fig. 13 is another schematic cross-sectional view along AA' in fig. 2. Referring to fig. 13, since the display panel moire is caused by interference variation of the vertical periodic spatial frequency, it is particularly important that the brightness uniformity of the liquid crystal dimming display panel 21 is effectively adjusted by the scattering layer 22, meanwhile, considering that the distance t between the scattering layer 22 and the first light shielding layer 201 affects the light transmittance of the display panel, the Ratio of the maximum value to the minimum value of the transmittance is defined as the display Contrast Ratio (CR), the total amount of light entering the eyes of the observer can be calculated by using the ray tracing technique from the reversibility of light, and the inventors have found that the larger the display Contrast value is, the less the interference superposition is, and the smaller the influence of the moire phenomenon on the display effect is.
FIG. 14 is another schematic cross-sectional view taken along the direction AA' of FIG. 2, in accordance with the above-described embodiments; FIG. 15 is another cross-sectional view taken along the direction AA' of FIG. 2; fig. 16 is another schematic cross-sectional view along AA' in fig. 2. As shown in connection with fig. 14-16, optionally, the first light shielding layer 201 includes at least one of a plurality of first metal line layers 2022, and the second light shielding layer 211 includes a light shielding structure 2162; the display panel 200 further includes a second film layer 60 'disposed between the first light shielding layer 201 and the second light shielding layer 211, the second film layer 60' being disposed on a side of the second metal line layer 2122 adjacent to the light shielding structure 2162; the scattering layer 22 multiplexes the second film layer 60'.
Specifically, as shown in fig. 14 to 16, when the difference between the length of the repetition period of the light shielding structure 2162 and the length of the repetition period of at least one metal layer of the plurality of first metal line layers 2022 is small, the second light shielding layer 211 includes the light shielding structure 2162, the light shielding structure 2162 may be a black matrix between two adjacent color resists 2161, the liquid crystal display panel 21 may further include the common electrode 215 on the side of the second liquid crystal layer 213 away from the pixel electrode 50', and the interlayer insulating layer 315' between the common electrode 215 and the light shielding structure 2162, and the display panel 200 further includes the second film layer 60' between the first light shielding layer 201 and the second light shielding layer 211. Preferably, the second film layer 60' may include at least one of the pixel electrode insulating layer 314' and the interlayer insulating layer 315', and the diffusion layer 22 multiplexes at least one of the pixel electrode insulating layer 314' and the interlayer insulating layer 315 '. For example, in fig. 13, the scattering layer 22 multiplexes the pixel electrode insulating layer 314'; in fig. 14, the scattering layer 22 multiplexes the interlayer insulating layer 315'; as shown in fig. 15, the scattering layer 22 multiplexes the pixel electrode insulating layer 314 'and the interlayer insulating layer 315', and by disposing the scattering layer 22 on the side of the second metal line layer 2122 close to the light shielding structure 2162, the distance between the first metal line layer 2022 and the scattering layer 22 is increased, and by using the scattering layer 22 to break the interference superposition of the light paths of regular period between the first metal line layer 2022 and the light shielding structure 2162, the moire generation can be further reduced, the light transmittance is improved, the contrast CR of the display panel is increased, and the display effect is enhanced.
On the basis of the above embodiment, as further shown in fig. 4 to 16, the first film layer 60 includes a first insulating layer 601 and a second insulating layer 602; in the light emitting direction of the display panel (as shown in the Y direction in the figure), the second insulating layer 601 is located on a side of the first insulating layer 602 close to the first base substrate 70; the scattering layer 22 multiplexes at least the second insulating layer.
As further shown in fig. 4-16 in combination with the present embodiment, the first film 60 includes a first insulating layer 601 and a second insulating layer 602, and at least two insulating layers exist between the first light-shielding layer 201 and the second light-shielding layer 211 along the Y direction in the drawing, for example, the first light-shielding layer 201 is the gate layer 31, the second light-shielding layer 211 is the gate layer 31', the first insulating layer 601 may be the gate insulating layer 311, the second insulating layer 602 may be any one of the insulating layer 312, the planarization layer 313, the pixel electrode insulating layer 314, the second array substrate 214, the gate insulating layer 311', the insulating layer 312', and the planarization layer 313', and the scattering layer 22 multiplexes the insulating layers that are farther from the first light-shielding layer 201 than the gate insulating layer 311, and preferably, the second insulating layer 602 that is farther from the first light-shielding layer 201 is used to increase the distance between the scattering layer 22 and the first light-shielding layer 201 without changing the thickness of the existing film of the display panel, so as to increase the display contrast CR and reduce the transmission interference contrast, and further optimize the display effect on the display contrast.
Further, as shown in fig. 10-16, optionally, when the light shielding structure 2162 is a black matrix, the second film 60 'may further include at least one of a gate insulating layer 311', an interlayer insulating layer 312', a planarization layer 313', a pixel electrode insulating layer 314', and an interlayer insulating layer 315', and preferably, the scattering layer 22 multiplexes the insulating layers relatively far from the first light shielding layer 201, for example, the first light shielding layer 201 is the pixel electrode 50, the second light shielding layer 211 is the pixel electrode 50', the first insulating layer 601 may be the pixel electrode insulating layer 314', and the scattering layer 22 multiplexes the interlayer insulating layers 315 'far from the pixel electrode 50', as shown in fig. 14.
On the basis of the above embodiment, fig. 17 is another schematic cross-sectional view along AA' direction in fig. 2, and as shown in fig. 7, 8 and 17, optionally, the first substrate 70 includes a first color film substrate 2061 and a second array substrate 214, and the display panel further includes a lamination adhesive layer 80 located between the first color film substrate 2061 and the second array substrate 214; the diffusion layer 22 multiplexes at least one of the first color film substrate 2061, the second array substrate 214, and the adhesive layer 80.
Specifically, as shown in fig. 7, 8 and 17, the first substrate 70 may include a first color film substrate 2061 of a liquid crystal dimming panel and a second array substrate 214 of a liquid crystal display panel 21, and the adhesive layer 80 is used for attaching the liquid crystal dimming panel 20 and the liquid crystal display panel 21 to be tightly attached, and the scattering layer 22 multiplexes at least one layer of the first color film substrate 2061, the second array substrate 214 and the adhesive layer 80, so that emergent light of the liquid crystal dimming panel 20 can be effectively homogenized, and interference moire phenomenon formed by the liquid crystal dimming panel 20 and the liquid crystal display panel 21 is avoided. As shown in fig. 17, the scattering layer 22 multiplexes the adhesive layer 80, and does not need to change the original film structure of the display panel, which is simple to operate and easy to be implemented, and has a small influence on the display effect of the display panel.
Based on the above embodiment, fig. 18 is another schematic cross-sectional view along AA' direction in fig. 2. As shown in fig. 18, the scattering layer 22 is provided in the liquid crystal display panel 21; the liquid crystal dimming panel 20 further includes a first array substrate 204 and a first color film substrate 2061, and the liquid crystal display panel 21 further includes a second array substrate 214 and a second color film substrate 2163; wherein the thickness t1 of the second array substrate 214 is greater than the thickness t2 of the first array substrate 204, and/or the thickness t3 of the first color film substrate 2061 is greater than the thickness t4 of the second color film substrate 2163.
Specifically, as shown in fig. 18, for example, in conjunction with fig. 3 and 18, to further increase the distance t between the diffusion layer 22 and the first light shielding layer 201, it is preferable that the diffusion layer 22 is disposed in the liquid crystal display panel 21 above the adhesive layer 80, so that the distance t is greater, and the position of the diffusion film 22 has an advantage of being easier to adjust. Further, the thickness t1 of the second array substrate 214 may be set to be larger than the thickness t2 of the first array substrate 204 by increasing the substrate thickness between the first light shielding layer 201 and the second light shielding layer 211; alternatively, the thickness t3 of the first color film substrate 2061 is set to be larger than the thickness t4 of the second color film substrate 2163; or the thickness t1 of the second array substrate 214 is larger than the thickness t2 of the first array substrate 204, and the thickness t3 of the first color film substrate 2061 is larger than the thickness t4 of the second color film substrate 2163, so as to increase the distance t between the scattering layer 22 and the first light-shielding layer 201, further reduce or even eliminate moire phenomenon, increase the display contrast CR and improve the display effect.
Experimental tests have shown that, with a fixed diffuse haze of the scattering layer 22, there is a difference in the repeat period linewidth of the first repeat unit 2022 that can be designed for different distances t, where diffuse haze (haze) refers to the percentage of the material's scattered luminous flux to the luminous flux that is transmitted through the material, which is also known as haze, and is an indicator that characterizes the scattering as a measure of the degree of turbidity of a transparent or translucent material. Taking the first light shielding layer 201 as a plurality of first metal line layers 2022 in the first color film substrate 206, taking the second light shielding layer 201 as a black matrix BM in the liquid crystal display panel as an example, the repetition period of the first repeating unit 2111 is BM line width, by increasing the thickness of the substrate glass and increasing the distance t between the scattering layer 22 and the first light shielding layer 201, the design range of the BM line width can be increased, and the larger the maximum line width of BM is, the larger the structural design space of the display panel is, which is beneficial to the structural design of the display panel; further, the BM line width is fixed, and the half angle value of the scattering layer 22 can be reduced while the distance t is increased, so that the smaller the half angle value is, the larger the light transmittance of the display panel is, the larger the display contrast CR is, and the more obvious the display effect is improved. The half angle value refers to an included angle between a direction of which the luminous intensity value of the material is half of the axial intensity value and the luminous axial direction (normal direction), and 2 times of the half angle value is a visual angle (or called half power angle), and the larger the half angle value is, the more divergent the light rays are; the smaller the half angle value is, the more concentrated the light rays are, and the clearer the display effect is.
It should be noted that, considering the problem of hole punching, the smaller the distance T between the first array substrate 204 of the liquid crystal dimming panel 20 and the second color film substrate 2163 of the liquid crystal display panel 21, the better, and the thickness T1 of the second array substrate 214 and the thickness T3 of the first color film substrate 2061 are set within a reasonable range as far as possible without affecting the display effect, and specific values are related to the film layer arrangement of the display panel, which is not particularly limited herein.
Fig. 19 is a schematic view of a scattering layer according to an embodiment of the present invention, based on the above embodiment. As shown in fig. 3 to 19, the scattering layer 22 includes a scattering layer substrate 221 and scattering particles 222 doped in the scattering layer substrate 221; the refractive index of the scattering particles 222 is n1, and the refractive index of the scattering layer base is n2, where n1+noten2.
Specifically, with reference to the scattering layer 22 shown in fig. 3 to 19, at least one of the first film 60, the second film 60', the first substrate 70, and the adhesive layer 80 provided in the foregoing embodiments may be reused, and the scattering layer 22 is uniformly atomized by doping the scattering particles 222 in the scattering layer base 221 through a high-temperature CVD process, and through processes such as uniform stirring, coating and baking. The shape of the scattering particles 222 may be spherical, cubic, or non-standard, and the specific shape is not limited herein, and the refractive index n1 of the scattering particles 222 is set to be different from the refractive index n2 of the scattering layer substrate 221, so as to realize refractive index differentiation in the film layer, and the backlight light is scattered by the scattering layer 22 to change the propagation path, thereby achieving the haze effect, so that the light vibration waveforms of the light passing through the first light shielding layer 201, the scattering layer 22, and the light passing through the second light shielding layer 211 do not satisfy the interference superposition condition any more, and interference lines can be reduced or even eliminated, avoiding generating the mole lines, and playing the role of improving the contrast ratio and the display effect of the display panel.
With continued reference to fig. 2-19, the scattering particles 222 include transparent resin particles or metal particles, based on the above-described embodiments.
Specifically, the scattering particles 222 include transparent resin particles or metal particles, and the transparent resin particles can reduce light shielding and improve the light extraction rate of the display panel, and optionally, the transparent resin particles have a diameter D1 of 5 μm or less and D1 of 100 μm or less. For example, if resin particles such as phenolic resin and polyvinyl chloride resin are adopted, transparent resin particles with the size of micron can be selected, so that light can be uniformly scattered while light is not shielded, light interference superposition is avoided, generation of moire is reduced, and contrast and display effect of the display panel can be effectively improved. Alternatively, transparent resin particles may be provided as the scattering particles 222 in the first base substrate 70.
Further, considering that the temperature is high in the preparation process of the insulating layer, the resin material may be melted, so that high-temperature-resistant metal particles or high-temperature-resistant transparent resin particles may be used to play a role in scattering light. Optionally, the diameter of the metal particles is D2, and D2 is more than or equal to 5nm and less than or equal to 10nm. For example, silver ions and the like, on the premise of least influencing the transmittance, metal particles with smaller sizes are adopted, so that the scattering effect on light is met, and the doping of the metal particles is facilitated.
Based on the same inventive concept, the embodiment of the invention also provides a display device. Fig. 20 is a schematic structural diagram of a display device according to an embodiment of the present invention, and as shown in fig. 20, the display device includes any one of the display panels provided in the foregoing embodiments. Illustratively, as shown in fig. 20, the display device 300 includes a display panel 200. Therefore, the display device also has the advantages of the display panel in the above embodiment, and the same points can be understood by referring to the explanation of the display panel, and the description thereof will not be repeated.
The display device 300 provided in the embodiment of the present invention may be a mobile phone as shown in fig. 20, or any electronic product with a display function, including but not limited to the following categories: television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, industrial control equipment, medical display screen, touch interactive terminal, etc., which is not particularly limited by the embodiment of the invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (12)
1. The display panel is characterized by comprising a liquid crystal dimming panel and a liquid crystal display panel which are sequentially laminated in the light emitting direction perpendicular to the plane of the display panel;
the liquid crystal dimming panel comprises a first shading layer, and the liquid crystal display panel comprises a second shading layer; in a setting plane of the first light shielding layer, the first light shielding layer includes a plurality of first repeating units; in the setting plane of the second light shielding layer, the second light shielding layer comprises a plurality of second repeating units, and the repeating period T1 of the first repeating units and the repeating period T2 of the second repeating units meet the condition that |T1-T2|/T1 is less than or equal to 10%;
the display panel further includes a diffusion layer between the first light shielding layer and the second light shielding layer.
2. The display panel of claim 1, wherein the liquid crystal dimming panel further comprises a first pixel circuit comprising a plurality of first metal line layers;
the liquid crystal display panel also comprises a second pixel circuit and a second color film substrate, wherein the second pixel circuit comprises a plurality of second metal wire layers, and the second color film substrate comprises a shading structure;
the first light shielding layer comprises at least one of a plurality of layers of the first metal wire layer, and the second light shielding layer comprises at least one of a plurality of layers of the second metal wire layer and/or the light shielding structure.
3. The display panel according to claim 2, wherein the first light shielding layer includes at least one of a plurality of the first metal line layers, and the second light shielding layer includes at least one of a plurality of the second metal line layers;
the display panel further comprises a first film layer and a first substrate, wherein the first film layer and the first substrate are positioned between the first light shielding layer and the second light shielding layer, the first film layer is positioned on one side, close to the liquid crystal display panel, of the first metal wire layer, and the first substrate is positioned on one side, close to the second metal wire layer, of the first film layer;
the scattering layer multiplexes the first film layer and/or the first substrate.
4. The display panel according to claim 2, wherein the first light shielding layer includes at least one of a plurality of the first metal line layers, and the second light shielding layer includes the light shielding structure;
the display panel further comprises a second film layer positioned between the first light shielding layer and the second light shielding layer, and the second film layer is positioned on one side of the second metal wire layer close to the light shielding structure;
the scattering layer multiplexes the second film layer.
5. The display panel of claim 3, wherein the first film layer comprises a first insulating layer and a second insulating layer;
in the light emitting direction of the display panel, the second insulating layer is positioned on one side of the first insulating layer, which is close to the first base plate substrate;
the scattering layer multiplexes at least the second insulating layer.
6. The display panel of claim 3, the first base substrate comprising a first color film base substrate and a second array base substrate, the display panel further comprising a bond line between the first color film base substrate and the second array base substrate;
the scattering layer multiplexes at least one layer of the first color film substrate, the second array substrate and the adhesive layer.
7. The display panel according to claim 1, wherein the scattering layer is provided in the liquid crystal display panel;
the liquid crystal dimming panel further comprises a first array substrate and a first color film substrate, and the liquid crystal display panel further comprises a second array substrate and a second color film substrate;
the thickness of the second array substrate is larger than that of the first array substrate, and/or the thickness of the first color film substrate is larger than that of the second color film substrate.
8. The display panel of claim 1, wherein the scattering layer comprises a scattering layer substrate and scattering particles doped in the scattering layer substrate;
the refractive index of the scattering particles is n1, and the refractive index of the scattering layer substrate is n2, wherein n1 noteq n2.
9. The display panel according to claim 8, wherein the scattering particles comprise transparent resin particles or metal particles.
10. The display panel according to claim 9, wherein the transparent resin particles have a diameter of D1,5 μm and D1 and 100 μm.
11. The display panel according to claim 9, wherein the diameter of the metal particles is D2, and D2 is 5 nm.ltoreq.d2.ltoreq.10nm.
12. A display device comprising the display panel of any one of claims 1-11.
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| CN102043282A (en) * | 2009-10-14 | 2011-05-04 | Nec液晶技术株式会社 | Optical writing device |
| CN107703670A (en) * | 2017-10-23 | 2018-02-16 | 京东方科技集团股份有限公司 | A kind of display panel and display device |
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| JP5921042B2 (en) * | 2013-07-30 | 2016-05-24 | シャープ株式会社 | Method for manufacturing light diffusing member |
| WO2016189816A1 (en) * | 2015-05-27 | 2016-12-01 | パナソニックＩｐマネジメント株式会社 | Optical device |
| US10564469B2 (en) * | 2018-03-19 | 2020-02-18 | A.U. Vista, Inc. | Liquid crystal display device having wire grid polarizer and #two display structures and method of forming the same |
| US10578934B2 (en) * | 2018-04-27 | 2020-03-03 | A.U. Vista, Inc. | Color sequential display device and display method thereof |
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| CN102043282A (en) * | 2009-10-14 | 2011-05-04 | Nec液晶技术株式会社 | Optical writing device |
| CN107703670A (en) * | 2017-10-23 | 2018-02-16 | 京东方科技集团股份有限公司 | A kind of display panel and display device |
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