CN1945406A - Pixel structure of display device and its producing method - Google Patents
Pixel structure of display device and its producing method Download PDFInfo
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- CN1945406A CN1945406A CN 200610143121 CN200610143121A CN1945406A CN 1945406 A CN1945406 A CN 1945406A CN 200610143121 CN200610143121 CN 200610143121 CN 200610143121 A CN200610143121 A CN 200610143121A CN 1945406 A CN1945406 A CN 1945406A
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Abstract
A pixel structure is applicable to a display device, which is constituted by a crystal layer that is set between a first and a second substrate. The pixel structure includes: a number of the first, second and third sub-pixels, a number of alignment controlling patterns that are respectively formed in the first, second and third sub-pixels, to control the distribution of the liquid crystal molecules of liquid crystal layer, a number of opaque regions that are respectively formed in the first, second and third sub-pixels and are actually corresponding to the alignment controlling, and at least two sub-pixel patterns in the first, second and third sub-pixels is shaded by the opaque regions with different areas.
Description
Technical field
The invention relates to a kind of dot structure of display device, and particularly relevant for a kind of dot structure that improves the display device of colour cast.
Background technology
Since portable product (portable product) as PDA(Personal Digital Assistant), mobile phone (cellularphone) and even, the consumption market of the large-sized projection TV of projector grows up fast, (Liqiuid Crystal Display, demand LCD) is also increasing for display panels.More and more consumers require the image display screen of these portable products or projection TV can present perfect display effect.
LCD Panel can be divided into penetration (transmissive), reflective (reflective) and three kinds of fundamental types of semi-reflective (tranflective) according to the light mode of advancing.The penetration LCD Panel is to reach demonstration with back light, and its advantage is that display effect is good under ordinary ray and half-light line, but out of doors under the daylight, then is difficult for the identification displaying contents.The reflection type liquid crystal display screen does not need to add light source, and is to use the light of surrounding environment, therefore out of doors or the well-lighted indoor good display effect that has, and power consumption low than the penetration LCD Panel.The semi-reflective LCD Panel then combines both advantages, has been applied to products such as mobile phone or personal digital assistant at present.
No matter be the LCD Panel of above-mentioned which kind of type, its primary structure all is a filling liquid crystal molecule between a pair of substrate, utilization puts on the voltage swing of pixel electrode and the orientation of liquid crystal molecule is changed to some extent, and then changes the polarization direction by the light of liquid crystal layer.Therefore, the penetrance of light then changes along with the difference of Liquid Crystal Molecules Alignment mode, and to the voltage swing that liquid crystal panel applied, liquid crystal panel can demonstrate the brightness of different GTGs (gray scale) by control.Liquid crystal molecule in the liquid crystal layer can be divided into again stable twisted nematic (Twisted Nematic mode, TN) and the vertical orientation type (Vertical Alignment mode, VA).When service voltage not, stable twisted nematic liquid crystal molecule one of them substrate in a pair of substrate has reversed 90 degree altogether to another substrate; When supplying with enough big voltage, liquid crystal molecule then is rotated into parallel with direction of an electric field.As for vertical orientation type liquid crystal molecule, when service voltage not, liquid crystal molecule is perpendicular to this to substrate; When supplying with enough big voltage, liquid crystal molecule then revolves and turn 90 degrees and with this substrate is become to be arranged in parallel.
For the display panels that general large tracts of land is used, as the display screen of mobile computer, the single pixel the inside of its liquid crystal panel needs to form many display fields (multi-domain), to reach wide-visual angle effect.And the multiregional vertical align technology of Fujitsu (Multi-domain Vertical alignment MVA) can be described as the earliest the liquid crystal display panel with wide visual angle technology that occurs.
Figure 1A, Figure 1B illustrate the multizone display panels that uses vertical orientation type liquid crystal molecule respectively when service voltage not and the rough schematic behind the service voltage.Liquid crystal panel is formed by first plate structure 10 and 20 pairs of groups of second plate structure, and middle filling liquid crystal molecule 302 is to form liquid crystal layer 30 between first plate structure 10 and second plate structure 20.Second plate structure, 20 parts mainly form thin film transistor (TFT) (the Thin Film Transistor of controllable pixels action at second substrate, 202 places, TFT), metal level and insulation course (all not showing), and being formed with pixel electrode 204 on the insulation course, the top then covers alignment film 206.Wherein, pixel electrode 204 is to separate mutually with groove (spacing) 208.Groove 208 bottoms also are covered with alignment film 206.First plate structure, 10 parts then have one first substrate (as glass substrate), 102, one transparency electrodes (as the ITO electrode), 104 and one alignment film 106.In addition, the first substrate place more forms a thrust (protrusion) 108, and its surface more is covered with alignment film 106.
Shown in Figure 1A, when service voltage not, most liquid crystal molecule 302 is vertical with pixel electrode 204.And the liquid crystal molecule 302 of adjacent protrusions thing 108 will be to arrange perpendicular to the mode on thrust 108 surfaces, and the liquid crystal molecule 302 of thrust 108 both sides also slightly tilts towards the both sides of thrust 108.Therefore, when service voltage not, thrust 108 provides liquid crystal molecule 302 1 tilt angles.
Shown in Figure 1B, when service voltage, because the tilt angle difference of the liquid crystal molecule 302 on thrust about 108 two inclined-planes, be subjected to electric field influence, be positioned at the half of liquid crystal molecules 302 in thrust 108 left side to the right square neck fall, and be positioned at the right half of liquid crystal molecules 302 of thrust 108 left square neck fall, make to form two display fields in the single pixel.By changing the shape of thrust 108, can form multizone (Multi-domain) and reach wide-visual angle effect.
In addition, except forming thrust 108, also can on pixel electrode, form a plurality of slits (slit), so that pixel is divided into a plurality of zones by slit, when applying electric field, owing on slit and divided electrode edge position, can produce tilting electric field, reverse and make near liquid crystal molecule run-off the straight herein, acting force with its orientation expands in other place, zone simultaneously, causes other liquid crystal molecule in the zone also to be affected, and then reaches many display fields and wide-visual angle effect.
Please be simultaneously with reference to Fig. 2 A, Fig. 2 B and Fig. 2 C.Wherein, Fig. 2 A illustrates a kind of diagrammatic cross-section of TFT of second plate structure of traditional display panels, and this section is that the 2A-2A profile line is drawn in Fig. 2 C; Fig. 2 B illustrates a kind of diagrammatic cross-section of storage capacitor structure of second plate structure of conventional liquid crystal, and this section is that the 2B-2B profile line is drawn in Fig. 2 C; Fig. 2 C illustrates the synoptic diagram of single sub-pixel of the LCD of a kind of traditional multi-domain perpendicular alignment-type pattern (MVA Mode).In addition, the sub-pixel of Fig. 2 C is the design of a common electrode type pixel storage capacitor (Cst On Common).
With traditional liquid crystal display panel of thin film transistor (TFT LCD), be to include most transparency electrodes, colored filter and black matrix"s (black matrix) etc. in first plate structure.Second plate structure then includes most and scans signal wire (scan line), most data signal lines, most storage capacitors (storagecapacitor), most changeover modules (for example being thin film transistor (TFT) TFT) and most transparency electrodes etc.It is that form with array intersects vertically that most of TFT LCD scan signal wire (scan line) and most data signal lines (data line).Described signal wire and the described data signal line of scanning defines most pixel regions.In full-color display device, a pixel (pixel) mainly is made up of three sub-pixels of RGB (RGB) (sub-pixels), and each sub-pixel has a TFT.Therefore each subpixel area is a pair ofly to scan signal wire and adjacent a pair of data signal line is defined by adjacent.And in each subpixel area, included a storage capacitors CST, a TFT assembly and a pixel electrode (being generally transparency electrode ITO).Fig. 2 C can represent the synoptic diagram of R, G in the full-color display device or the single subpixel area of B.
Shown in Fig. 2 A, be to have second substrate 202 in second plate structure, and on second substrate 202, form grid (Gate Electrode) 212 (patterning the first metal layer and form), on the grid 212 and be coated with one first insulation course 213.First insulation course, 213 tops and have drain D, source S (forming) by lithography one second metal level with by amorphous silicon (amorphous silicon, a-Si) channel region 215 of the semi-conductor layer that forms.Afterwards, form a protective seam (Passivation Layer) 216 on drain D, source S and cover first insulation course 213.And on protective seam 216, form a contact hole (contact hole) 217 to expose one of them of source S or drain D, the pixel electrode 204 that is positioned at protective seam 216 tops then by contact hole 217 with one of them electric connection of source S or drain D.
And scan signal wire and data signal line is respectively at forming simultaneously in the one patterned processing procedure that forms grid 212 and source/drain region S/D, and it is isolated with first insulation course 213 wherein scanning between signal wire and the data signal line.
And among Fig. 2 B, storage capacitors (CST) comprises common electrode 214 and capacitance electrode 218, is to be separated by with first insulation course 213 between the two.The manufacture process of storage capacitors is to finish simultaneously when making TFT.Common electrode 214 is patterning the first metal layers and getting, and 218 of capacitance electrodes are patterning second metal levels and getting.216 of protective seams have covered capacitance electrode 218 and insulation course 213 simultaneously.In the protective seam 216 and have a contact hole 219, pixel electrode 204 is to electrically connect via contact hole 219 and capacitance electrode 218.Wherein, the common electrode 214 of the storage capacitors of all pixels among the TFT-LCD all links to each other, and is connected to a reference potential of system.
Among Fig. 2 C, R, G or B subpixel area are controlled by data signal line DL (Data Line) and scan signal line SL (Scan Line), and comprise a thin film transistor (TFT) (TFT) 27 and a pixel electrode (PE) 204.Then can produce storage capacitors corresponding to common electrode Vcom place.The common electrode Vcom of Fig. 2 C is the first metal layer (label 214) of patterning among Fig. 2 B, then there is the formed capacitance electrode 218 of second metal level of patterning the top, and 204 of the pixel electrodes of the top utilize contact hole 219 and capacitance electrode 218 to electrically connect.And on the pixel electrode 204 and form a plurality of slits 220, to reach many display fields and wide viewing angle purpose.In addition, in Fig. 2 C, also show: after second plate structure and first plate structure are to group, in order to reach multizone and wide viewing angle purpose at the formed thrust 108 of first plate structure.
Yet, no matter be thrust 108 (shown in Figure 1A, Figure 1B) or slit 220 (shown in Fig. 2 C) individualism, or both tools and the orientation that constitutes control pattern though can reach multizone and wide-visual angle effect, causes the shortcoming of dark attitude light leak easily all.For present display panels, when dark attitude, picture is not complete black, but there is the situation of light leak to produce, and the light leak amount difference of drawing the zone because of each time causes the color of picture can produce skew, be the problem of dark attitude colour cast, the panel display quality is greatly affected, wherein again with blue partially the most normal being observed of situation of dark attitude.
Summary of the invention
In view of this, purpose of the present invention is exactly that a kind of dot structure of display device is being provided, and utilizes the formed light tight district of veil, suitably covers the orientation control pattern in each sub-pixel, to reach the purpose of improving colour cast.
According to purpose of the present invention, a kind of dot structure is proposed, be applicable to a display device (display), this display device is to be located in one first substrate and one second substrate by a liquid crystal layer to constitute, this dot structure comprises:
A plurality of first sub-pixels, a plurality of second sub-pixel and a plurality of the 3rd sub-pixel;
A plurality of orientations control patterns (alignment controlling pattern) are to be formed at respectively in described first, second and the 3rd sub-pixel, with the alignment direction of the liquid crystal molecule of controlling this liquid crystal layer;
A plurality of light tight districts (opaque regions), be to be formed in described first, second and the 3rd sub-pixel respectively and, and the described orientation control pattern of at least two sub pixels is covered by the described light tight district of different area in described first, second and the 3rd sub-pixel in fact corresponding to partly described orientation control pattern.
Effect of the present invention is utilized the formed light tight district of veil for a kind of dot structure of display device is provided, and suitably covers the orientation control pattern in each sub-pixel, to reach the purpose of improving colour cast.
The present invention also provides a kind of one pixel structure process method, be applied in the display device, this display device be by a liquid crystal layer be located in one first the base and one second substrate in the institute constitute, described one pixel structure process method comprises:
Form a plurality of first sub-pixels, a plurality of second sub-pixel and a plurality of the 3rd sub-pixel;
Form a plurality of orientations control patterns respectively, in described first, second and the 3rd sub-pixel, with the alignment direction of the liquid crystal molecule of controlling described liquid crystal layer;
Form a plurality of light tight districts respectively, in described first, second and the 3rd sub-pixel and in fact corresponding to partly described orientation control pattern, and the described orientation control pattern of at least two sub pixels is covered by the described light tight district of different area in described first, second and the 3rd sub-pixel.
The present invention provides a kind of manufacture method of display device again, comprising:
One first plate structure and one second plate structure are provided;
Form a plurality of first sub-pixels, a plurality of second sub-pixel and a plurality of the 3rd sub-pixel in described first plate structure and described second plate structure;
Form a plurality of orientations control patterns respectively in described first, second and the 3rd sub-pixel;
Form respectively and a plurality ofly light tightly distinguish in described first, second and the 3rd sub-pixel and, and the described orientation control pattern of at least two sub pixels is covered by the described light tight district of different area in described first, second and the 3rd sub-pixel in fact corresponding to partly described orientation control pattern; And
To organizing described first plate structure and described second plate structure, and provide a liquid crystal layer between this first plate structure and this second plate structure, wherein, described orientation control pattern is the alignment direction of the liquid crystal molecule of this liquid crystal layer of control.
Description of drawings
Figure 1A, Figure 1B illustrate many display fields display panels of using vertical orientation type liquid crystal molecule respectively when service voltage not and the rough schematic behind the service voltage.
Fig. 2 A illustrates a kind of diagrammatic cross-section of TFT of second plate structure of traditional display panels, and this section is that the 2A-2A profile line is drawn in Fig. 2 C.
Fig. 2 B illustrates a kind of diagrammatic cross-section of storage capacitor structure of second plate structure of conventional liquid crystal, and this section is that the 2B-2B profile line is drawn in Fig. 2 C.
Fig. 2 C illustrates the synoptic diagram of single sub-pixel of the LCD of a kind of traditional multi-domain perpendicular alignment-type pattern (MVA Mode).
Fig. 3 illustrates the synoptic diagram that has thrust in the single sub-pixel according to the TFT LCD of first embodiment of the invention.
Fig. 4 A, Fig. 4 B illustrate among Fig. 3 the diagrammatic cross-section of drawing along the 4L-4L profile line, wherein Fig. 4 A, Fig. 4 B be respectively with black matrix" and metal as light tight district.
Fig. 5 A, Fig. 5 B illustrate the synoptic diagram that black matrix" among Fig. 4 A covers the thrust of half respectively and covers whole thrusts.
Fig. 6 illustrates the synoptic diagram that has slit in the single sub-pixel according to the TFT LCD of second embodiment of the invention.
Fig. 7 A, Fig. 7 B illustrate among Fig. 6 the diagrammatic cross-section of drawing along the 7L-7L profile line, wherein Fig. 7 A, Fig. 7 B be respectively with black matrix" and metal as light tight district.
Fig. 8 A～8B illustrates the synoptic diagram that black matrix" among Fig. 7 A covers the slit of half respectively and covers whole slits.
Fig. 9 illustrates the synoptic diagram that has slit in the single sub-pixel according to the TFT LCD of third embodiment of the invention.
Figure 10 A, Figure 10 B illustrate among Fig. 9 the diagrammatic cross-section of drawing along the 10L-10L profile line, wherein Figure 10 A, 10B be respectively with black matrix" and metal as light tight district.
Figure 11 A～11B illustrates the synoptic diagram that black matrix" among Figure 10 A covers the slit of half respectively and covers whole slits.
Figure 12 illustrates the synoptic diagram that has four sub-pixels in the single dot structure according to the TFT LCD of fourth embodiment of the invention.
Figure 13 illustrate corresponding to the 4th colourless among Figure 12 sub-pixel the black matrix" synoptic diagram.
Figure 14 illustrates the chromaticity coordinates synoptic diagram that situation is covered in light tight districts different in the full-color display device.
Figure 15 covers the chromaticity coordinates synoptic diagram of situation for the orientation control pattern of wherein one group of RGB sub-pixel of the present invention.
Drawing reference numeral:
10: the first plate structures
102: the first substrates
103: color filter layers
104: transparency electrode
106: alignment film
108,308,808: thrust
20: the second plate structures
202: the second substrates
203,216: protective seam
204: pixel electrode
206: alignment film
208: groove
212: grid
213: the first insulation courses
214: common electrode
215: channel region
217,219: the contact hole
218: capacitance electrode
220,608,908: slit
27: thin film transistor (TFT)
30: liquid crystal layer
302: liquid crystal molecule
408,708,918,1008: black matrix"
418,718,928: metal level
1001,1002,1003,1004: the first sub-pixels, second sub-pixel, the 3rd sub-pixel, the 4th sub-pixel
Embodiment
The present invention proposes a kind of dot structure that improves the display device of colour cast, particularly can control the skew situation of display device its color when dark attitude.Utilize the formed light tight districts of veil such as black matrix" (as: photoresistance), metal or combinations thereof, will cause easily dark attitude light leak thrust (protrusion) or/and slit orientations such as (slit) control pattern suitably cover, fall the part light leak amount of each sub-pixel with retaining, the light leak amount difference that makes each sub-pixel of display device is (also promptly in the brightness difference of dark attitude, color also can change), and then control its change color, improve the situation of colour cast.
A dot structure of the present invention is to be applicable to a display device (display), and this display device is to be located in one first substrate and one second substrate by a liquid crystal layer to constitute.Dot structure comprises: a plurality of first, second and the 3rd sub-pixels; A plurality of orientations control patterns (alignment controlling pattern) are to be formed at respectively in described first, second and the 3rd sub-pixel, with the alignment direction of the liquid crystal molecule of control liquid crystal layer; A plurality of light tight districts (opaque regions), be to be formed in described first, second and the 3rd sub-pixel respectively and, and the described orientation control pattern of at least two sub pixels is covered by the described light tight district of different area in described first, second and the 3rd sub-pixel in fact corresponding to partly described orientation control pattern.Embodiments of the invention are to be that the color of red group, color and the 3rd sub-pixel that second sub-pixel is green group are the color of blue group with first sub-pixel, as enforcement example of the present invention, yet, the present invention is not restricted to this, other color on the CIE chromaticity coordinates is also applicable, as: purple, yellow green, Chinese red, rufous, yellow, indigo or other color.
Following orientation control pattern according to different mode proposes first, second, third and fourth embodiment as detailed description of the present invention.Yet the present invention is not restricted to this, and the scope of described embodiment desire protection can't limit of the present invention.And be as the applied display device of dot structure of the present invention among the embodiment with liquid crystal display panel of thin film transistor.Thin portion about liquid crystal display panel of thin film transistor please refer to Figure 1A～1B, Fig. 2 A～2C and related description.Moreover the icon among the embodiment and Figure 1A～1B, Fig. 2 A～2C same components are to continue to use same numeral.In addition, for clearly demonstrating technical characterstic of the present invention, the icon among the embodiment is the orientation control pattern and the corresponding light tight district thereof of drawing single sub-pixel (R, G or B sub-pixel).And also omit unnecessary assembly in the icon, with clear demonstration technical characterstic of the present invention.
First embodiment:
Among first embodiment orientation control pattern of the thrust (protrusion) of above plate structure as liquid crystal display panel of thin film transistor (TFT LCD).
Please refer to Fig. 3, Fig. 4 A～4B and Fig. 5 A～5B.Fig. 3 illustrates the synoptic diagram that has thrust in the single sub-pixel according to the TFT LCD of first embodiment of the invention.Fig. 4 A, 4B illustrate among Fig. 3 the diagrammatic cross-section of drawing along the 4L-4L profile line, wherein Fig. 4 A, Fig. 4 B be respectively with black matrix" and metal as light tight district.Fig. 5 A～5B illustrates the synoptic diagram that black matrix" among Fig. 4 A covers the thrust of half respectively and covers whole thrusts.
As shown in Figure 3, a R, G or B subpixel area are controlled by data signal line DL (Dara Line) and scan signal line SL (Scan Line), and comprise a thin film transistor (TFT) (TFT) 27 and a pixel electrode (PE) 204.214 places then can produce storage capacitors corresponding to common electrode (Vcom), and then there is capacitance electrode 218 (second metal level of patterning forms) common electrode 214 tops.204 of the pixel electrodes of the top utilize contact hole 219 and capacitance electrode 218 to electrically connect.In addition, have a plurality of thrusts 308 in first plate structure, with as orientation control pattern, after second plate structure of TFT LCD and first plate structure were to group, the existence of thrust 308 can reach multizone and wide viewing angle purpose.In Fig. 3, can find out the relevant position of thrust 308 in sub-pixel.
In this embodiment, be to utilize black matrix" and metal respectively as light tight district, its position is corresponding with thrust 308, suitably to keep off the light leak amount all or part of in the subpixel area of going.Shown in Fig. 4 A, Fig. 4 B, TFT LCD is formed by first plate structure 10 and 20 pairs of groups of second plate structure, and middle filling liquid crystal molecule 302 is to form liquid crystal layer 30 between first plate structure 10 and second plate structure 20.Second plate structure, 20 parts mainly form the thin film transistor (TFT) (not shown) and the protective seam 203 of controllable pixels action at second substrate, 202 places, and have pixel electrode 204 on the protective seam 203, and the top then covers alignment film 206.10 of first plate structures have one first substrate 102, a color filter layers 103, a transparency electrode 104, thrust 308 and are covered in an alignment film 106 on thrust 308 surfaces.When service voltage not, thrust 308 provides liquid crystal molecule 302 1 tilt angles.
In Fig. 4 A, first plate structure 10 has more black matrix" (Black Matrix) 408; The some of black matrix" 408 is then as the light tight district of this embodiment, partly or entirely to block thrust 308.Among Fig. 4 B, then with the metal level 418 of second plate structure 20 as the light tight district of blocking thrust 308.
Fig. 5 A～5B then illustrates the top view of black matrix" 408 among Fig. 4 A, wherein the black matrix" 408 of Fig. 5 A has covered the thrust 308 of half in the subpixel area, and 408 of the black matrix"s of Fig. 5 B have covered thrusts 308 whole in the subpixel area.Certainly, this field has knows the knowledgeable usually when knowing that the figure of black matrix" 408 is not limited to these two kinds, but during according to practical application, the thrust 308 of this sub-pixel needs the number percent that be covered and decides.
Second embodiment:
Among second embodiment, be on the pixel electrode of second plate structure, to form a plurality of slits (slit), as the orientation control pattern of liquid crystal display panel of thin film transistor (TFT LCD).
Please refer to Fig. 6, Fig. 7 A～7B and Fig. 8 A～8B.Fig. 6 illustrates the synoptic diagram that has slit in the single sub-pixel according to the TFT LCD of second embodiment of the invention.Fig. 7 A, 7B illustrate among Fig. 6 the diagrammatic cross-section of drawing along the 7L-7L profile line, wherein Fig. 7 A, 7B be respectively with black matrix" and metal as light tight district.Fig. 8 A～8B illustrates the synoptic diagram that black matrix" among Fig. 7 A covers the slit of half respectively and covers whole slits.
As shown in Figure 6, a R, G or B subpixel area are controlled by data signal line DL (Data Line) and scan signal line SL (Scan Line), and comprise a thin film transistor (TFT) (TFT) 27 and a pixel electrode (PE) 204.214 places then can produce storage capacitors corresponding to common electrode (Vcom), and then there is capacitance electrode 218 (second metal level of patterning forms) common electrode 214 tops.204 of the pixel electrodes of the top utilize contact hole 219 and capacitance electrode 218 to electrically connect.In addition, be to have a plurality of slits 608 on the pixel electrode 204 of second plate structure, with as orientation control pattern, reach multizone and wide viewing angle purpose.
In this embodiment, also can utilize black matrix" and metal as light tight district respectively, its position is corresponding with slit 608.Shown in Fig. 7 A, Fig. 7 B, TFT LCD is formed by first plate structure 10 and 20 pairs of groups of second plate structure, and middle filling liquid crystal molecule 302 is to form liquid crystal layer 30 between first plate structure 10 and second plate structure 20.Second plate structure, 20 parts mainly form the thin film transistor (TFT) (not shown) and the protective seam 203 of controllable pixels action at second substrate, 202 places, and have pixel electrode 204 on the protective seam 203, and the top then covers alignment film 206.Slit 608 on the pixel electrode 204 is that sub-pixel is divided into a plurality of zones.When applying electric field, on slit 608 and divided electrode edge position, can produce tilting electric field, reverse and make near liquid crystal molecule 302 run-off the straights herein, acting force with its orientation expands in other place, zone simultaneously, cause other liquid crystal molecule 302 in the zone also to be affected, and then reach many display fields and wide-visual angle effect.10 of first plate structures have one first substrate 102, a color filter layers 103, a transparency electrode 104 and an alignment film 106.
In Fig. 7 A, first plate structure 10 has more black matrix" (Black Matrix) 708; The some of black matrix" 708 is then as the light tight district of this embodiment, partly or entirely to block slit 608.Among Fig. 7 B, then with the metal level 718 of second plate structure 20 as the light tight district of blocking slit 608.
Fig. 8 A～8B then illustrates the top view of black matrix" 708 among Fig. 7 A, wherein the black matrix" 708 of Fig. 8 A has covered the slit 608 of half in the subpixel area, and 708 of the black matrix"s of Fig. 8 B have covered slits 608 whole in the subpixel area.Certainly have and know the knowledgeable usually as can be known, the figure of black matrix" 708 is not limited in these two kinds, but during according to practical application, the slit 608 of this sub-pixel needs the number percent that be covered and decides.
The 3rd embodiment:
Among the 3rd embodiment, be to form thrust (protrusion) in first plate structure, form a plurality of slits (slit) on the pixel electrode of second plate structure, both control pattern as the orientation of liquid crystal display panel of thin film transistor (TFT LCD) simultaneously.
Please refer to Fig. 9, Figure 10 A～10B and Figure 11 A～11B.Fig. 9 illustrates the synoptic diagram that has slit in the single sub-pixel according to the TFT LCD of third embodiment of the invention.Figure 10 A, Figure 10 B illustrate among Fig. 9 the diagrammatic cross-section of drawing along the 10L-10L profile line, wherein Figure 10 A, Figure 10 B be respectively with black matrix" and metal as light tight district.Figure 11 A～11B illustrates the synoptic diagram that black matrix" among Figure 10 A covers the slit of half respectively and covers whole slits.
As shown in Figure 9, a R, G or B subpixel area are controlled by data signal line DL (Data Line) and scan signal line SL (Scan Line), and comprise a thin film transistor (TFT) (TFT) 27 and a pixel electrode (PE) 204.214 places then can produce storage capacitors corresponding to common electrode (Vcom), and then there is capacitance electrode 218 (second metal level of patterning forms) common electrode 214 tops.204 of the pixel electrodes of the top utilize contact hole 219 and capacitance electrode 218 to electrically connect.Among Fig. 9, be slit 908, as orientation control pattern, to reach many display fields and wide viewing angle purpose with pixel electrode 204 in the thrust 808 of first plate structure and second plate structure.
In this embodiment, also can utilize black matrix" and metal as light tight district respectively, its position is corresponding with the position of thrust 808 and slit 908.Shown in Figure 10 A, Figure 10 B, TFT LCD is formed by first plate structure 10 and 20 pairs of groups of second plate structure, and middle filling liquid crystal molecule 302 is to form liquid crystal layer 30 between first plate structure 10 and second plate structure 20.First plate structure 10 comprises: one first substrate 102, a color filter layers 103, a transparency electrode 104 and an alignment film 106; Wherein, has thrust 808 on the transparency electrode 104.Second plate structure 20 comprises: second substrate 202, thin film transistor (TFT) (not shown), protective seam 203, pixel electrode 204 and alignment film 206; Wherein, pixel electrode 204 is to have slit 908.
In Figure 10 A, first plate structure 10 has more black matrix" (Black Matrix) 918, and the some of black matrix" 918 then as the light tight district of this embodiment, is controlled pattern (comprising thrust 808 and slit 908) partly or entirely to block orientation; Among Figure 10 B, then with the metal level 928 of second plate structure 20 as the light tight district of blocking thrust 808 and slit 908, go light leak amount all or part of in the subpixel area with retaining suitably.
Figure 11 A～11B then illustrates the top view of black matrix" 918 among Figure 10 A, wherein the black matrix" 918 of Figure 11 A has covered in the subpixel area orientation control pattern (comprising thrust 808 and slit 908) of half, and 918 of the black matrix"s of Figure 11 B have covered orientation control patterns (comprising thrust 808 and slit 908) whole in the subpixel area.Certainly have and know the knowledgeable usually as can be known, the figure of black matrix" 918 is not limited in these two kinds, but during according to practical application, the orientation of this sub-pixel control pattern needs the number percent that be covered and decides.
The 4th embodiment:
Figure 12 illustrates the synoptic diagram that has four sub-pixels in the single dot structure according to the TFT LCD of fourth embodiment of the invention.At this embodiment, each dot structure is except comprising as first, second and third sub-pixel of being narrated among first, second and third embodiment, more comprise at least one the 4th sub-pixel in dot structure in order to increase chroma.That the 4th sub-pixel can be is colourless, red, green, color (as: purple, yellow green, Chinese red, rufous, yellow, indigo or other the color of other color on blueness or the CIE chromaticity coordinates.), in this embodiment, be to be that colourless color is done explanation, but be not limited thereto with the 4th sub-pixel, also can four more than the sub-pixel, as: six sub-pixels, eight sub-pixels etc.In addition, in first, second, third and fourth sub-pixel, be to control pattern as orientation with thrust.
As shown in figure 12, single dot structure comprises first sub-pixel 1001, second sub-pixel 1002, the 3rd sub-pixel 1003 and the 4th sub-pixel 1004.And the control pattern of the orientation in the first, second, third or the 4th sub-pixel (thrust) is identical at this orientation control pattern with first embodiment.Same, in this embodiment, can utilize part metals floor or black matrix" as the light tight district of blocking thrust 308.Be respectively the color of the color of red group, green group and the color of blue group is an example with first sub-pixel 1001, second sub-pixel 1002 and the 3rd sub-pixel 1003, the synoptic diagram of light tight district pattern can be with reference to the black matrix" figure (cover the thrust of half respectively and cover whole thrusts) of Fig. 5 A among first embodiment and Fig. 5 B.If when the 4th sub-pixel 1004 is colourless color, the design in light tight district then can be around around the 4th sub-pixel 1004, for example is just for data signal line (data line) with scan signal wire (scan line) or correspond to the black matrix" of color filter layers.Please refer to Figure 13, it illustrates the black matrix" synoptic diagram corresponding to the 4th colourless among Figure 12 sub-pixel.As shown in figure 13, be with the light tight district figure of black matrix" 1008 as the 4th sub-pixel 1004, and the pattern of black matrix" 1008 corresponding data signal wire and scan signal wire does not just almost hide the orientation control pattern (thrust) of the 4th sub-pixel 1004.If the 4th sub-pixel is other color, then the embodiment according to the above-mentioned described embodiment of the present invention designs the area that cover in light tight district.
The dot structure of display device reaches the relevant experiment of covering:
Cover in the experiment relevant, the dot structure that is applied to display device of the present invention mainly comprises:
(1) a plurality of first, second and the 3rd sub-pixels are to be that the color of red group, color and the 3rd sub-pixel that second sub-pixel is green group are the color of blue group with first sub-pixel, as implementing example;
(2) a plurality of orientations control patterns (alignment controlling pattern) are to be formed at respectively in described first, second and the 3rd sub-pixel, in order to the alignment direction of the liquid crystal molecule of control liquid crystal layer; The for example thrust of first embodiment, or the slit of second embodiment, or the thrust of the 3rd embodiment and slit;
(3) a plurality of light tight districts (opaque regions) is to be formed in described first, second and the 3rd sub-pixel respectively and corresponding to described orientation control pattern; And the described orientation control pattern of at least two sub pixels is covered by the described light tight district of different area in described first, second and the 3rd sub-pixel.In other words, in RGB three sub pixels, the area that the orientation of at least two kinds of different colours sub-pixels control pattern is covered by light tight district is inequality.
Figure 14 illustrates the chromaticity coordinates synoptic diagram that situation is covered in light tight districts different in the full-color display device.Wherein, the meaning of each symbology is as follows:
Solid diamond: when not covering (without any light tight district), the chromaticity coordinates of bright attitude, (x, y) about (0.266,0.28).
Asterisk: when not covering (without any light tight district), the chromaticity coordinates of dark attitude, (x, y) about (0.251,0.24).
Black triangle: the dark attitude chromaticity coordinates when orientation control pattern all covers in the red sub-pixel, (x, y) about (0.232,0.237).
Solid squares: the dark attitude chromaticity coordinates when orientation control pattern all covers in the green sub-pixels, (x, y) about (0.247,0.196).
Solid circles: the dark attitude chromaticity coordinates when orientation control pattern all covers in the blue subpixels, (x, y) about (0.291,0.313).
Open diamonds: the dark attitude chromaticity coordinates when orientation control pattern all covers in redness, green and the blue subpixels, (x, y) about (0.267,0.255).
Hollow triangle: orientation control pattern covers 1/2 o'clock dark attitude chromaticity coordinates in the red sub-pixel, (x, y) about (0.242,0.240).
Square hollow: orientation control pattern covers 1/2 o'clock dark attitude chromaticity coordinates in the green sub-pixels, (x, y) about (0.25,0.22).
Hollow circle: orientation control pattern covers 1/2 o'clock dark attitude chromaticity coordinates in the blue subpixels, (x, y) about (0.268,0.272).
Can find out from the result of Figure 14:
(1) when the pattern crested is controlled in orientation in the red sub-pixel, its dark attitude chromaticity coordinates all can move toward the left side, and all crested (black triangle) is hidden (hollow triangle) inclined to one side past left side than half;
(2) when the pattern crested is controlled in orientation in the green sub-pixels, its dark attitude chromaticity coordinates all can move toward the lower left corner, and all crested (solid squares) is hidden (square hollow) inclined to one side past below than half;
(3) when the pattern crested is controlled in orientation in the blue subpixels, its dark attitude chromaticity coordinates all can move toward the upper right corner, and all crested (solid circles) is hidden (hollow circle) inclined to one side past upper right side than half;
Therefore control the situation of covering of pattern by the orientation of control RGB sub-pixel, promptly the position of the dark attitude chromaticity coordinates of may command allows chromaticity coordinates move to and uses the display device desired position, and then solves the problem of the dark attitude colour cast of conventional display device.
Figure 15 covers the chromaticity coordinates synoptic diagram of situation for the orientation control pattern of wherein one group of RGB sub-pixel of the present invention.In this group experiment, be that orientation control pattern in the red sub-pixel is all covered (100%), orientation control pattern covers half (50%) in the green sub-pixels, orientation control pattern covers 90% in the blue subpixels, experimental result finds that its dark attitude chromaticity coordinates (black triangle) almost can overlap with the chromaticity coordinates (solid diamond) of bright attitude, has just improved the problem of dark attitude colour cast.
In addition, it should be noted that thrust also can printing opacity, can reduce dark attitude light leak though it is covered, improve contrast, brightness also can descend.Generally, for the highest, blue subpixels is to the minimum that offers of brightness with the brightness value of green sub-pixels.So if when practical application, consider brightness problem, it is too many for brightness is descended, can cover the thrust (because its brightness value is the highest) of the green sub-pixels of minority, and can cover the thrust (is minimum to offering of brightness) of majority or whole blue subpixels, overall brightness can not descended too much, and dark attitude color also can obtain the improvement of appropriateness.In Figure 14, only cover in the blue subpixels orientation control pattern (hollow circle) of half, though its dark attitude color can not be the same with bright attitude color (solid diamond), but significantly improvement is arranged also.
Comprehensive many group experimental results of the present invention, find that one of following situation all can significantly improve the situation of dark attitude colour cast:
(1) area that orientation control pattern is covered by light tight district in the blue subpixels is the area that is covered by light tight district greater than the control of the orientation described in red sub-pixel pattern;
(2) area that orientation control pattern is covered by light tight district in the blue subpixels is the area that is covered by light tight district greater than orientation control pattern in the green sub-pixels;
(3) orientation control pattern is covered about area of 50% to 100% by light tight district in the blue subpixels;
(4) orientation control pattern is covered about at the most 50% area in the green sub-pixels by light tight district;
(5) orientation control pattern is covered about at the most 50% area by described light tight district in the red sub-pixel.
In addition, use the present invention when a liquid crystal display panel of thin film transistor (TFT LCD), the form of TFT is not limit, can be the TFT of top grid structure (bottom gate type) or the TFT of bottom-gate structure (top gate type), and can be the n type or the p type TFT of the processing procedure manufacturing of polysilicon, amorphous silicon, microcrystal silicon or monocrystalline silicon.And first substrate in first plate or first plate structure or first substrate material are also without limits, for example can be transparent glass substrate, quartz base plate, or opaque pottery or silicon substrate, or flexual plastic base (as: rubber, polyesters, poly-vinegar class, polyalkenes, poly-epoxies or other material).
Moreover, though narrate in the foregoing description: color filter layers 103 is arranged at first plate structure, yet application of the present invention is not as limit.In order to improve the contraposition precision of black matrix" and data signal line, color filter layers can be arranged on the second substrate place with TFT, is called COA (color filter onarray) or AOC (array on color filter).Structure of the present invention also can be applicable to the TFTLCD of this kind kenel.
Must it should be noted that the material of using of complying with the pixel electrode on second substrate can form different type of displays, and also can apply to above-mentioned described embodiment.If the material of pixel electrode is that transparent material comprises transparent metal oxide, as: indium-zinc oxide, indium tin oxide, aluminium zinc oxide, cadmium zinc oxide, similarly material or above-mentioned combination, then this is the penetrating type display device, be the embodiment of display device of the present invention also, but the invention is not restricted to this.If the material of pixel electrode comprises metal (as: titanium, aluminium, chromium, tantalum, gold, silver, copper, iron, neodymium, molybdenum or similar material), alloy or above-mentioned combination for the material of reflection, then this is a reflection display device, and the embodiment of display device of the present invention is also applicable.If the material of pixel electrode comprises the material of semi-penetration semi-reflective, also, the material of pixel electrode partly is that the material by transparent material and another pixel electrode partly is made of catoptrical material, and then this is for partly wearing anti-display device.That is to say that the employed pixel electrode of first, second, third sub-pixel of the above embodiment of the present invention can be transparent material, reflected light material or above-mentioned combination.And the 4th sub-pixel can be arranged in pairs or groups freely according to other demand and design, so employed pixel electrode can be transparent material, reflection material or above-mentioned combination.
Moreover, must it should be noted that, the light tight district that the foregoing description is enumerated is applied on first substrate with metal level and black matrix" respectively or on second substrate, yet, in order can more to minimize the influence that light leak brought, the above embodiments also can use metal level and black matrix" simultaneously on first substrate and second substrate.That is to say that black matrix" is used on first substrate, metal level is used on second substrate.And the material of black matrix" also can be made of metal (as: titanium, aluminium, chromium, tantalum, gold, silver, copper, iron, neodymium, molybdenum or similar material), alloy, metal oxide, metal nitride or above-mentioned combination or polymkeric substance (as: black photoresistance, polyester or similar material) or above-mentioned combination.In other words, if when the organic material of black matrix" is photoresistance, can be the black photoresistance or partly chromatic photoresist be covered in the predetermined black matrix" part that forms mutually.If when the material of black matrix" is metal level, then form pattern in predetermined black matrix" part.If black matrix" is organic material and metal level when using simultaneously, then organic material can on the metal level or under.And the shape of the described sub-pixel of the above embodiment of the present invention is except rectangle, square.The present invention is not limited to this, also can use polygon, as: rhombus, hexagon, pentagon, trapezoidal or other shape.The shape of slit except the described shape of the above embodiments of the present invention, also comprises dendroid, pectination, V shape, W shape, herring-bone form, X shape or other shape or above-mentioned combination.Moreover the described storage capacitors of the above embodiments of the present invention is made of the common electrode and second metal, yet, also can use the first metal layer and/or second metal level and pixel electrode partly to constitute.In addition, the protrusion of described first plate structure of the above embodiments of the present invention is being example on transparency electrode, yet protrusion also can be on alignment film.At last, the orientation of the above embodiments of the present invention control pattern (comprising thrust and slit) is formed at the position of first substrate or second substrate except embodiment is described, still can be formed on first substrate or second substrate.That is to say that former first substrate that is formed at of embodiment also can be changed to and is formed on second substrate, and orientation that can be whole control pattern or the control of orientation partly pattern are protrusion.
In sum, though the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is as the criterion when looking the claim claim person of defining.
Claims (27)
1. a dot structure is applicable to a display device, and this display device is to be located in one first substrate and one second substrate by a liquid crystal layer to constitute, and described dot structure comprises:
A plurality of first sub-pixels, a plurality of second sub-pixel and a plurality of the 3rd sub-pixel;
A plurality of orientations control patterns are to be formed at respectively in described first, second and the 3rd sub-pixel, with the alignment direction of the liquid crystal molecule of controlling described liquid crystal layer;
A plurality of light tight districts, be to be formed in described first, second and the 3rd sub-pixel respectively and, and the described orientation control pattern of at least two sub pixels in described first, second and the 3rd sub-pixel is covered by the described light tight district of different area in fact corresponding to partly described orientation control pattern.
2. dot structure as claimed in claim 1, wherein said orientation control pattern is a plurality of thrusts, is formed at the described first substrate place in described first, second and the 3rd sub-pixel respectively.
3. dot structure as claimed in claim 1, wherein said orientation control pattern is a plurality of slits, is formed at respectively on the pixel electrode of described second substrate in described first, second and the 3rd sub-pixel.
4. dot structure as claimed in claim 1, wherein said orientation control pattern comprises:
A plurality of thrusts are formed at the described first substrate place in described first, second and the 3rd sub-pixel respectively; With
A plurality of slits are formed at respectively on the pixel electrode of described second substrate in described first, second and the 3rd sub-pixel.
5. dot structure as claimed in claim 1, wherein said first substrate has a color filter layers, and described second substrate has a plurality of thin film transistor (TFT)s.
6. dot structure as claimed in claim 1, wherein said second substrate has a color filter layers and a plurality of thin film transistor (TFT).
7. dot structure as claimed in claim 1, the area that the area that the thrust described in wherein said the 3rd sub-pixel is covered by the described light tight district of correspondence is covered by the described light tight district of correspondence greater than the thrust described in described first sub-pixel.
8. dot structure as claimed in claim 1, the area that the area that the thrust described in wherein said the 3rd sub-pixel is covered by the described light tight district of correspondence is covered by the described light tight district of correspondence greater than the thrust described in described second sub-pixel.
9. dot structure as claimed in claim 1, the thrust described in wherein said the 3rd sub-pixel is covered about area of 50% to 100% by described light tight district.
10. dot structure as claimed in claim 1, the thrust described in wherein said second sub-pixel is covered about at the most 50% area by described light tight district.
11. dot structure as claimed in claim 1, the thrust described in wherein said first sub-pixel is covered about at the most 50% area by described light tight district.
12. dot structure as claimed in claim 1 more comprises a plurality of the 4th sub-pixels, and described orientation control pattern is to be formed in described the 4th sub-pixel.
13. dot structure as claimed in claim 12, wherein said light tight zone is surrounded on the periphery of described the 4th sub-pixel in fact.
14. dot structure as claimed in claim 1, wherein said light tight district is the some of a plurality of black matrix"s in described first, second and the 3rd sub-pixel.
15. dot structure as claimed in claim 1, wherein said light tight district is the some of a plurality of metal levels in described first, second and the 3rd sub-pixel.
16. dot structure as claimed in claim 1, wherein said first, second is respectively the color of the color of red group, green group and the color of blue group with the 3rd sub-pixel.
17. an one pixel structure process method is applied in the display device, this display device be by a liquid crystal layer be located in one first the base and one second substrate in the institute constitute, described one pixel structure process method comprises:
Form a plurality of first sub-pixels, a plurality of second sub-pixel and a plurality of the 3rd sub-pixel;
Form a plurality of orientations control patterns respectively, in described first, second and the 3rd sub-pixel, with the alignment direction of the liquid crystal molecule of controlling described liquid crystal layer;
Form a plurality of light tight districts respectively, in described first, second and the 3rd sub-pixel and in fact corresponding to partly described orientation control pattern, and the described orientation control pattern of at least two sub pixels is covered by the described light tight district of different area in described first, second and the 3rd sub-pixel.
18. manufacture method as claimed in claim 17 more comprises forming a plurality of the 4th sub-pixels, and described orientation control pattern is to be formed in described the 4th sub-pixel.
19. manufacture method as claimed in claim 18, wherein said light tight zone is surrounded on the periphery of described the 4th sub-pixel in fact.
20. the manufacture method of a display device comprises:
One first plate structure and one second plate structure are provided;
Form a plurality of first sub-pixels, a plurality of second sub-pixel and a plurality of the 3rd sub-pixel in described first plate structure and described second plate structure;
Form a plurality of orientations control patterns respectively in described first, second and the 3rd sub-pixel;
Form respectively and a plurality ofly light tightly distinguish in described first, second and the 3rd sub-pixel and, and the described orientation control pattern of at least two sub pixels is covered by the described light tight district of different area in described first, second and the 3rd sub-pixel in fact corresponding to partly described orientation control pattern; And
To organizing described first plate structure and described second plate structure, and provide a liquid crystal layer between this first plate structure and this second plate structure, wherein, described orientation control pattern is the alignment direction of the liquid crystal molecule of this liquid crystal layer of control.
21. manufacture method as claimed in claim 20, wherein said orientation control pattern is a plurality of thrusts, is to be formed in described first plate structure.
22. manufacture method as claimed in claim 20, wherein said orientation control pattern is a plurality of slits, is to be formed in described second plate structure.
23. manufacture method as claimed in claim 20, wherein said orientation control pattern comprises:
Form a plurality of thrusts, in described first plate structure; With
Form a plurality of slits, on the pixel electrode in described second plate structure.
24. manufacture method as claimed in claim 20, wherein said light tight district is the some of a plurality of black matrix"s in described first, second and the 3rd sub-pixel.
25. manufacture method as claimed in claim 20, wherein said light tight district is the some of a plurality of metal levels in described first, second and the 3rd sub-pixel.
26. manufacture method as claimed in claim 20 more comprises forming a plurality of the 4th sub-pixels, and described orientation control pattern is to be formed in described the 4th sub-pixel.
27. manufacture method as claimed in claim 26, wherein said light tight zone are in fact around the periphery of described the 4th sub-pixel.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102629022A (en) * | 2011-08-16 | 2012-08-08 | 京东方科技集团股份有限公司 | Display device, liquid crystal display panel and manufacturing method of liquid crystal display panel |
| CN102768445A (en) * | 2012-07-18 | 2012-11-07 | 深圳市华星光电技术有限公司 | Sub-pixel display structure and liquid crystal display panel using same |
| CN104166281A (en) * | 2014-08-13 | 2014-11-26 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and manufacturing method thereof |
| WO2018228359A1 (en) * | 2017-06-16 | 2018-12-20 | 京东方科技集团股份有限公司 | Display substrate, display panel and display device |
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| JP4215905B2 (en) * | 1999-02-15 | 2009-01-28 | シャープ株式会社 | Liquid crystal display |
| US6400440B1 (en) * | 1999-06-23 | 2002-06-04 | International Business Machines Corporation | Passive liquid crystal display having pre-tilt control structure and light absorbent material at a center |
| CN1506722B (en) * | 2002-12-05 | 2010-05-26 | 奇美电子股份有限公司 | Liquid crystal display |
| CN100403102C (en) * | 2003-12-24 | 2008-07-16 | 友达光电股份有限公司 | Multiple zone vertical arranged liquid crystal display board |
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