CN101369070B - Display apparatus - Google Patents
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- CN101369070B CN101369070B CN2008102101143A CN200810210114A CN101369070B CN 101369070 B CN101369070 B CN 101369070B CN 2008102101143 A CN2008102101143 A CN 2008102101143A CN 200810210114 A CN200810210114 A CN 200810210114A CN 101369070 B CN101369070 B CN 101369070B
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Abstract
The invention is directed to a higher contrast in a display device having a lighting device as a front light. A lighting portion (200) is attached to a reflective liquid crystal display portion (300). A first transparent substrate (10) and a second transparent substrate (20) made of a glass substrate etc. are attached to each other with a sealing layer coated on those peripheral portions therebetween. The back surface of the first transparent substrate (10) is attached to the reflective liquid crystal display portion (300), and an organic EL element is formed on the front surface of the first transparent substrate (10). The organic EL element is sealed in a space surrounded by the first transparent substrate (10), the second transparent substrate (20), and the sealing layer. The organic EL element is formed in a region corresponding to a pixel region (33) of the reflective liquid crystal display portion. Alternatively, the organic EL element is formed on the second transparent substrate (20).
Description
The application is that application number is 200610082591.7, and the applying date is on May 18th, 2006, and denomination of invention is divided an application for the Chinese patent application of " display device ".
Technical field
The present invention is about a kind of display device that possesses Lighting Division on the reflective liquid crystal display part.
Background technology
Liquid crystal indicator (calling LCD in the following text) possesses feature both slim and that consumed power is low, is widely used as the monitor of portable communication devices such as the monitor of computing machine or mobile phone at present.Infiltration type LCD, reflection type LCD and semi-transmission type LCD are arranged among the LCD.
Infiltration type LCD uses transparency electrode as applying voltages to the pixel electrode that liquid crystal is used, at LCD rear configuration backlight, even see through the dark demonstration that also can become clear of light quantity on every side by what control this backlight.But under the environment that light is very strong outside as daytime outdoor, the characteristic that can't guarantee enough contrasts is arranged.
Reflection type LCD, the outer light that utilizes sunshine or indoor lamp etc. be as light source, and will be incident to these outer light of LCD, by being reflected by the reflective pixel electrode that the reflection horizon constituted that is formed on the sightingpiston side group plate.Then, will be incident to liquid crystal, and the light quantity that the light by each pixel being controlled at reflective pixel electrode reflection penetrates from the LCD panel is to show.This reflection type LCD owing to utilize outer light as light source, exists in the problem that can't show under the environment that does not have outer light.
Semi-transmission type LCD has concurrently through function and two kinds of functions of reflection function, and getting final product corresponding bright environment on every side also can corresponding dark on every side environment.Yet, this semi-transmission type LCD, owing in a pixel, have through zone and reflector space, so there is the problem of the display efficiency difference of each pixel.
Therefore, consider by front light-source (front light) being set on the reflection type LCD so that the scheme that also can show under the environment in dark.Figure 31 is the synoptic diagram that is provided with the reflection type LCD of front light-source.Relative with the display surface of reflection type LCD 100 and dispose clear acrylic plate 110.On the face of face relative and opposition side, be formed with the ditch 111 of several dels with the reflection type LCD of this clear acrylic plate 110.In addition, dispose light source 112 in clear acrylic plate 110 sides.Be directed into the light of clear acrylic plate 110 from light source 112, because of the dip plane of ditch 111 towards the refraction of reflection type LCD 100 directions, and be incident to the display surface of reflection type LCD 100.
Patent documentation 1 Japanese patent laid-open 5-325586 communique
Patent documentation 2 TOHKEMY 2003-255375 communiques
Yet, owing to the light that is directed into from light source 112 the clear acrylic plate 110, can reflect towards reflection type LCD 100 directions because of the dip plane of being located at the ditch 111 on the clear acrylic plate 110, what also can be towards the direction refraction at observer 113 places that direction is opposite therewith simultaneously, so exist this light to spill and enter observer's eyes, the problem that the LCD contrast is reduced from clear acrylic plate 110.
Summary of the invention
Invent technical matters to be solved
The objective of the invention is to solve described problem, provide a kind of and possess the display device of lighting device as front light-source.
The principal character of display device involved in the present invention is listed below.
The present invention relates to a kind of display device, it is characterized by: possess the Lighting Division that is configured on the reflective liquid crystal display part; Described Lighting Division possesses: the 1st substrate, the back side are bonded on described reflective liquid crystal display part; The 2nd substrate engages by sealant; Organic EL component, be disposed at the surface of described the 2nd substrate, and this organic EL component has anode layer, covers this anode layer and the organic layer that forms and the cathode layer that has specific pattern and be formed on this organic layer and be made of the semitransparent electrode material; And light shield layer, the lower floor that it has the pattern corresponding with described cathode layer and is formed at described anode layer is in order to cover the light that produces from described organic EL component; Described reflective liquid crystal display part possesses: the 3rd substrate, and it has plurality of pixels, and among accepting to be formed at each pixel from the reflection of light pixel electrode that described organic EL component produced; The 4th substrate is disposed on described the 3rd substrate and its surface is formed with shared electrode; And liquid crystal layer, enclosed between described the 3rd substrate and described the 4th substrate; Described anode layer and described organic layer have specific pattern, and the width of described anode layer is greater than the width of described cathode layer and the width of described organic layer.
Preferably, described the 1st substrate and described the 4th substrate dual-purpose and constituted by a substrate.
Preferably, the surface of described the 1st substrate have with the surperficial relative desiccant layer that mode was disposed of described the 2nd substrate.
Preferably, desiccant-filled or have a resin with the refractive index refractive index about equally of described the 2nd substrate between the described the 1st and the 2nd substrate.
Preferably, the pass of the width of described cathode layer, described anode layer and described organic layer is described cathode layer＜described organic layer＜described anode layer.
Preferably, the width of described light shield layer is greater than the width of described anode layer.
Display device involved in the present invention, it adopts the bottom emissive type organic EL component (from the light that organic EL component sent, pattern towards the substrate-side ejaculation that is formed with this organic EL component) is used as front light-source, under bright light environments and under dark two kinds of situations, all can realize becoming clear, the liquid crystal display of high-contrast.
Description of drawings
Fig. 1 is the 1st cut-open view of the display device that relates to of the present invention the 1st embodiment.
Fig. 2 is the 2nd cut-open view of the display device that relates to of the present invention the 1st embodiment.
Fig. 3 is the partial top view of the pixel region 310 of reflective liquid crystal display part 300.
Fig. 4 is the cut-open view that the X-X line blocks in Fig. 3.
Fig. 5 is the partial top view of the pixel region 310 of reflective liquid crystal display part 300.
Fig. 6 is the cut-open view of the display device that relates to of the present invention the 2nd embodiment.
Fig. 7 is the 1st cut-open view of the display device that relates to of the present invention the 3rd embodiment.
Fig. 8 is the 2nd cut-open view of the display device that relates to of the present invention the 3rd embodiment.
Fig. 9 is the 3rd cut-open view of the display device that relates to of the present invention the 3rd embodiment.
Figure 10 is the cut-open view of the display device that relates to of the present invention the 4th embodiment.
Figure 11 is the 1st cut-open view of the display device that relates to of the present invention the 5th embodiment.
Figure 12 is the 2nd cut-open view of the display device that relates to of the present invention the 5th embodiment.
Figure 13 is the 3rd cut-open view of the display device that relates to of the present invention the 5th embodiment.
Figure 14 is the cut-open view of the organic el element of the display device that relates to of the present invention the 5th embodiment.
Figure 15 is the cut-open view of the display device that relates to of the present invention the 6th embodiment.
Figure 16 is the cut-open view of organic el element 12.
Figure 17 is the 1st cut-open view of the display device that relates to of the present invention the 7th embodiment.
Figure 18 is the 2nd cut-open view of the display device that relates to of the present invention the 7th embodiment.
Figure 19 is the cut-open view that the X-X line blocks in Fig. 3.
Figure 20 is the cut-open view of the display device that relates to of the present invention the 8th embodiment.
Figure 21 is the 1st cut-open view of the display device that relates to of the present invention the 9th embodiment.
Figure 22 is the 2nd cut-open view of the display device that relates to of the present invention the 9th embodiment.
Figure 23 is the 3rd cut-open view of the display device that relates to of the present invention the 9th embodiment.
Figure 24 is the cut-open view of the display device that relates to of the present invention the 10th embodiment.
Figure 25 is the 1st cut-open view of the display device that relates to of the present invention the 11st embodiment.
Figure 26 is the 2nd cut-open view of the display device that relates to of the present invention the 11st embodiment.
Figure 27 is the 3rd cut-open view of the display device that relates to of the present invention the 11st embodiment.
Figure 28 is the cut-open view of the display device that relates to of the present invention the 12nd embodiment.
Figure 29 is the cut-open view of organic el element.
Figure 30 is the cut-open view of organic el element.
Figure 31 is the synoptic diagram of reflection of light type LCD before being provided with.
Figure 32 is the cut-open view of the display device that relates to of the present invention the 13rd embodiment.
Figure 33 is the pattern synoptic diagram of the cathode layer of the display device that relates to of the present invention the 13rd embodiment.
Figure 34 is the cut-open view of the display device that relates to of the present invention the 14th embodiment.
The primary clustering symbol description
10 the 1st transparency carriers, 11 sealants
12 organic el elements 13,13A anode layer
14,14A organic layer 15 cathode layers
16 desiccant layers, 17 resins
20 the 2nd transparency carriers, 21 antireflection layers
30 the 3rd transparency carriers, 31 thin film transistor (TFT)s (TFT)
32 interlayer dielectrics, 33 pixel electrodes
34 the 4th transparency carriers, 35 shared electrode
36 light scattering layers, 37 Polarizers
40 liquid crystal layers, 45 resin beds
50 transparent electrode layers, 51 insulation courses
100 reflection type LCDs, 110 clear acrylic plates
111 del ditches, 112 light sources
113 observers, 200 Lighting Divisions
300 reflective liquid crystal display parts, 310 pixel regions
SR leaves the zone
Embodiment
Next with regard to the related display device of the present invention the 1st embodiment, be illustrated with reference to accompanying drawing.At first, with reference to Fig. 1 the whole formation of this display device is described.On reflective liquid crystal display part 300, engage Lighting Division 200 is arranged.Lighting Division 200 is as described below.The 1st transparency carrier 10 and the 2nd transparency carrier 20 that are made of glass substrate etc., sealant 11 gluings that resin by being coated on all ends separately etc. is constituted.
The back side of the 1st transparency carrier 10 is bonded on the surface of reflective liquid crystal display part 300, the 1 transparency carriers 10 and is formed with organic EL component 12 (hereinafter referred to as [organic el element]).Whereby, organic el element 12 is enclosed in the space that is surrounded by the 1st transparency carrier the 10, the 2nd transparency carrier 20 and sealant 11.In addition, organic el element 12 is formed on the zone corresponding with the zone 310 (with reference to Fig. 3) of reflective liquid crystal display part 300.
Part by anode layer 13 and the organic layer 14 of cathode layer double team about in the of 15 constitutes light-emitting zone.That is, the organic layer 14 that is positioned at cathode layer 15E below is light-emitting zone, and this light-emitting zone should also have the wire shaped identical with cathode layer 15 when overlooking.By antianode layer 13 apply positive potential, anticathode layer 15 applies negative potential, light-emitting zone is luminous.
Light from described light-emitting zone towards the below is by transparent anode layer 13 and the 1st transparency carrier 10 and towards 300 irradiations of reflective liquid crystal display part.The major part of the light from light-emitting zone towards the top can be by cathode layer 15 towards below reflection, and by transparent anode layer 13 and the 1st transparency carrier 10 and towards 300 irradiations of reflective liquid crystal display part.Thereby, at the eyes that can do one's utmost to prevent from directly to enter the observer below watching on the Lighting Division 200, and can improve the contrast of reflective liquid crystal display part 300 from the light of light-emitting zone.
In addition, because can invading because of moisture, organic el element 12 makes characteristics of luminescence deterioration, so, preferably form desiccant layer 16 in mode with the 1st transparency carrier 10 opposite faces on the surface of the 2nd transparency carrier 20 in order to prevent deterioration.By sealant 11 moisture of the invading seal cavity agent layer 16 that is dried is absorbed.
For fear of by the 2nd transparency carrier 20 and towards the outer light crested of organic el element 12 incidents, preferably, desiccant layer 16 in not overlapping with organic el element 12 mode, is formed at all ends of the 2nd transparency carrier 20.But, when desiccant layer 16 is made of transparent material, then need not be confined to this.In addition, in order to prevent outer reflection of light, preferably post antireflection film 21 at the back side of the 2nd transparency carrier 20.
In addition, as shown in Figure 2, in the space that is surrounded by the 1st transparency carrier the 10, the 2nd transparency carrier 20 and sealant 11, also can fill to have and equate with the refractive index of the 2nd transparency carrier or the resin 17 of refractive index about equally.In addition, also can integrally formed resin 17 and sealant 11.
Whereby, just can stop the intrusion of moisture really by sealant 11.In addition, in the structure shown in Figure 1, owing between organic el element 12 and the 2nd transparency carrier 20, have air layer, so be incident to the outer light of the 2nd transparency carrier 20, can reflect at the interface of air layer and the 2nd transparency carrier 20, and make liquid crystal display contrast deterioration.With respect to this, if according to structure shown in Figure 2, then be incident to the outer light of the 2nd transparency carrier 20, owing to can not reflect at the interface of the 2nd transparency carrier 20, and can be incident to reflective liquid crystal display part 300, so can improve the liquid crystal display contrast.In addition, in structure shown in Figure 2, desiccant layer 16 as shown in Figure 1 can be set also.
Next, with reference to Fig. 3 and Fig. 4, illustrate by the structure of the reflective liquid crystal display part 300 of described Lighting Division 200 illuminations and with the marriage relation of Lighting Division 200.Fig. 3 is the partial top view of the pixel region 310 of liquid crystal display part 300, and Fig. 4 is the cut-open view that the X-X line in Fig. 3 blocks.
On last each the set pixel of the 3rd transparency carrier 30 (TFT substrate) that constitutes by glass substrate, be formed with the thin film transistor (TFT) 31 (hereinafter referred to as TFT) that switch is used.TFT 31 is covered by interlayer dielectric 32, is formed with corresponding each TFT 31 and by as the aluminium reflective pixel electrodes that reflecting material constituted 33 such as (Al) on interlayer dielectric 32.Reflective pixel electrode 33 is connected drain electrode or the grid of pairing TFT 31 by being formed at contact hole CH on the interlayer dielectric 32.
Relative with the 3rd transparency carrier 30 that is formed with reflective pixel electrode 33, dispose the 4th transparency carrier 34 (substrate relatively) that constitutes by glass substrate.Be formed with the shared electrode 35 that constitutes by ITO on the surface of the 4th transparency carrier 34.At the back side of the 4th transparency carrier 34, being docile and obedient the preface lamination has by the diffusion light scattering layer 36 that adhesion layer constituted, reaches Polarizer 37.Light scattering layer 36 be in order to will giving scattering from the light of Lighting Division 200, and make it to be radiated at equably on the pixel electrode 33.Between the 4th transparency carrier 34 and the 3rd transparency carrier 30, enclose liquid crystal layer 40 is arranged.
According to described formation, then from the light of Lighting Division 200 radiation, can be according to Polarizer 37 towards the specific direction polarisation, and then be directed into liquid crystal layer 40 by light scattering layer the 36, the 4th transparency carrier 34 and shared electrode 35, and reflect because of reflective pixel electrode 33.The light of reflection can return same paths by reflective pixel electrode 33, and to can be observer institute visual in the gap of the line by cathode layer 15.
At this moment, according to the electric field that is applied between pixel electrode 33 and the shared electrode 35, the transmitance of light can change according to each pixel.Whereby, by intensity of light reflected can realize that according to each pixel variation LCD shows according to reflective pixel electrode 33.As previously described, because the cathode layer 15 of Lighting Division 200 has the function as light shield layer,, can improve the liquid crystal display contrast so can do one's utmost to prevent to leak from the light of the light-emitting zone of organic el element 12.
Therefore, preferably, engage irradiation unit 200 and reflective liquid crystal display part 300, the refraction of light is reflected by having with the resin bed 45 (for example UV hard resin-layer or visible light hard resin-layer) of the 1st transparency carrier 10 identical refractive indexes.
Next, be illustrated with regard to the configuration relation of Lighting Division 200 with the pixel of reflection type LCD 300.As shown in Figure 3, in the pixel region 310 of reflective liquid crystal display part 300, there are three kinds of pixel R, G, B of corresponding Red Green Blue to be arranged in line direction (x) and column direction (y).Though Fig. 3 still is not limited to this in residual quantity (delta) arrangement that each row staggers pixel R, G, B, also can be to arrange in the bar shaped (stripe) of each row proper alignment pixel R, G, B.The line of several cathode layers 15 of Lighting Division 200 is along the border of each pixel R, G, B and extend towards line direction (x).
Each pixel has a TFT 31 and a reflective pixel electrode 33.The spacing P1 of the line of the cathode layer 15 of Lighting Division 200 equates with the spacing P2 of pixel.In addition, the line of the cathode layer 15 of Lighting Division 200, preferably, be configured in the reflective pixel electrode 33 that is helpless to liquid crystal display leave region S R directly over.Whereby, just have in the major part of the light of reflective pixel electrode 33 reflection and can not blocked, and the gap of line that can be by several cathode layers 15 is the visual advantage of observer by cathode layer 15.
In addition, the spacing P1 of the line of the cathode layer 15 of Lighting Division 200 also can be less than pel spacing P2, and with the distance between centers of tracks P1 of cathode layer 15 to the ratio of pel spacing P2 (=P1/P2) be made as 1/ natural number.When distance between centers of tracks is identical with pel spacing, though in liquid crystal display, can interfere line or thin water wave (moire), these phenomenons can be prevented by setting like this.
In addition, otherwise the distance between centers of tracks P1 of the cathode layer 15 of Lighting Division 200 also can be greater than pel spacing P2, and distance between centers of tracks P1 is made as natural number to the ratio (P1/P2) of pel spacing P2.Can prevent to interfere line or thin water wave (moire) by such setting.
In addition, as shown in Figure 5, the line of several cathode layers 15 of Lighting Division 200 also can tilt to extend with respect to line direction (x).Can prevent to interfere line or thin water wave (moire) by such setting.
Then, the display device with regard to the present invention the 2nd embodiment relates to is illustrated with reference to Fig. 6.Fig. 6 shows the structure of reflective liquid crystal display part 300 and the cut-open view of Lighting Division 200 marriage relations, the cut-open view that its correspondence X-X line in Fig. 3 blocks.The characteristics that relate to as present embodiment are the 1st transparency carrier 10 that relates to of dual-purpose the 1st embodiment and the 4th transparency carrier 34 and form a transparency carrier.That is, as shown in Figure 6, the 1st transparency carrier 10 is deleted, and is formed with organic el element 12 on the 4th transparency carrier 34.Whereby, get final product the integral thickness of attenuate display device, can reduce cost simultaneously.
Then, the display device with regard to the present invention the 3rd embodiment relates to is illustrated with reference to accompanying drawing.Fig. 7 is the cut-open view of this display device integral body.The anode layer 13 of the organic el element 12 of the 1st embodiment (with reference to Fig. 1) does not have linear pattern, and with respect to this, in the present embodiment, the anode layer 13A of organic el element 12 has linear pattern.
That is, on the 1st transparency carrier 10, be formed with several anode layers 13A, and cover these anode layers 13A and be formed with organic layer 14, and on this organic layer 14, be formed with several cathode layers 15 with same linear pattern with linear pattern.The line overlap of several anode layers 13A of the line of several cathode layers 15A and the lower floor that is formed at these.In addition, fully identical with the 1st embodiment.
Shown in the 1st embodiment (Fig. 1), when the anode layer 13 that constitutes by ITO or IZO, when being formed on the 1st transparency carrier 10 by several not segregate patterns, just can utilize the poor of refractive index, by the outer light of anode layer 13 reflection incidents or the light that on organic el element 12, produces, and the liquid crystal display contrast is reduced by the 2nd transparency carrier 20.With respect to this, then relevant if according to present embodiment by the light between the line of anode layer 13A, can't be subjected to the reflections affect of anode layer 13A.Thereby the transmitance of light can raise, and can improve the liquid crystal display contrast.
In addition, in structure shown in Figure 7, though on the surface of the 2nd transparency carrier 20, be formed with desiccant layer 16 with the 1st transparency carrier 10 opposite faces, but as shown in Figure 8, also can in the space that is surrounded by the 1st transparency carrier the 10, the 2nd transparency carrier 20 and sealant 11, fill resin 17 with the refractive index that equates with the refractive index of the 2nd transparency carrier.
Fig. 9 shows the structure of reflective liquid crystal display part 300 and the cut-open view of Lighting Division 200 marriage relations, and it is equivalent to the cut-open view that corresponding X-X line in Fig. 3 blocks.About the structure and the 1st embodiment of reflective liquid crystal display part 300 identical.As previously described, the line of the cathode layer 15 of Lighting Division 200, though preferably, be configured in the reflective pixel electrode 33 that is helpless to liquid crystal display leave region S R directly over, but this situation, the line of anode layer 13A also overlay configuration below the line of cathode layer 15.Constituted light-emitting zone by the part of the organic layer 14 of the line double team of the line of anode layer 13A and cathode layer 15.The line of cathode layer 15 though can prevent to leak at light that light-emitting zone produces, is made as greatlyyer than the width W 2 of the line of anode layer 13A by the width W 1 with the line of cathode layer 15, promptly can reduce the leakage of light more and to improve the liquid crystal indication more.
Next, with regard to the related display device of the 4th embodiment of the present invention, be illustrated with reference to Figure 10.Figure 10 is the cut-open view that shows the marriage relation of the structure of reflective liquid crystal display part 300 and Lighting Division 200, the cut-open view that its correspondence is blocked along the X-X line among Fig. 3.As the characteristics of present embodiment, the 1st transparency carrier 10 that dual-purpose the 3rd embodiment relates to and the 4th transparency carrier 34 and form a transparency carrier.That is, as shown in figure 10, the 1st transparency carrier 10 is deleted, and is formed with organic el element 12 on the 4th transparency carrier 34.Whereby, integral thickness that promptly can the attenuate display device can reduce cost simultaneously.
Next, the display device with regard to the present invention the 5th embodiment relates to is illustrated with reference to accompanying drawing.Figure 11 is the cut-open view of the integral body of this display device.The anode layer 13 of the organic el element 12 of the 1st embodiment (with reference to Fig. 1), organic layer 14, the pattern that does not have wire, with respect to this, in the present embodiment, the anode layer 13A of organic el element 12, organic layer 14A, the pattern that all has wire.
Promptly, on the 1st transparency carrier 10, form several anode layers 13A with linear pattern, at these anode layers 13A superimposed layer several organic layers 14A with linear pattern is arranged, and on these organic layers 14A, be formed with several cathode layers 15 with same linear pattern.The line of several cathode layers 15 and the line of several organic layers 14A of the lower floor that is formed at these, the line overlap of several anode layers 13A.In addition, fully identical with the 1st embodiment.
Shown in the 1st embodiment (Fig. 1), when the anode layer 13 that constitutes by ITO or IZO, when being formed on the 1st transparency carrier 10 with non-linear pattern, just can utilize the poor of refractive index, reflect the outer light of incident or the light of generation on organic el element 12 according to anode layer 13, and the liquid crystal display contrast can reduce by the 2nd transparency carrier 20.In addition, also same reflection can take place in organic layer 14.
With respect to this,,, can't be subjected to the reflections affect of these layers then by the light between the line of anode layer 13A, organic layer 14A if according to present embodiment.Thereby the transmitance of light can raise, and can improve the liquid crystal display contrast.
In addition, in structure shown in Figure 11, though on the surface of the 2nd transparency carrier 20, be formed with desiccant layer 16 with the 1st transparency carrier 10 opposite faces, but as shown in figure 12, also can in the space that is surrounded by the 1st transparency carrier the 10, the 2nd transparency carrier 20 and sealant 11, fill resin 17 with the refractive index that equates with the refractive index of the 2nd transparency carrier.
Figure 13 is the cut-open view that shows the marriage relation of the structure of reflective liquid crystal display part 300 and Lighting Division 200, and it is equivalent to the cut-open view that corresponding X-X line in Fig. 3 blocks.The structure of reflective liquid crystal display part 300 and the 1st embodiment are identical.As previously described, the line of the cathode layer 15 of Lighting Division 200, though preferably be configured in the reflective pixel electrode 33 that is helpless to liquid crystal display leave region S R directly over the position, but the also superimposed below that is configured in the line of cathode layer 15 of the line of the line of organic layer 14A and anode layer 13A in this case.Constituted light-emitting zone by the line of the organic layer 14A of the line double team of the line of anode layer 13A and cathode layer 15.The line of cathode layer 15, though can prevent to leak at light that light-emitting zone produces, but the width W 4 of line that is made as width W 3 than the line of organic layer 14A, anode layer 13A by the width W 1 with the line of cathode layer 15 is big, promptly can reduce the leakage of light more and can improve the liquid crystal indication more.
As shown in figure 14, the distance L of asking at the edge of the line of the edge of the line of cathode layer 15 and organic layer 14A preferably, greater than the thickness T of organic layer 14A, can reduce the leakage of light so more.In addition, the width W 3 of the line of organic layer 14A also can be greater than the width W 4 of the line of anode layer 13A.
Next, just the related display device of the present invention the 6th embodiment is illustrated with reference to Figure 15.Figure 15 is the cut-open view that shows the marriage relation of the structure of reflective liquid crystal display part 300 and Lighting Division 200, the cut-open view that its correspondence is blocked along the X-X line among Fig. 3.As the characteristics of present embodiment, the 1st transparency carrier 10 among dual-purpose the 5th embodiment and the 4th transparency carrier 34 and form a transparency carrier.That is, as shown in figure 15, the 1st transparency carrier 10 is deleted, and is formed with organic el element 12 on the 4th transparency carrier 34.Whereby, integral thickness that promptly can the attenuate display device can reduce cost simultaneously.
In addition, the line of cathode layer 15 leaves on the region S R reflective pixel electrode 33 in addition by adjusting its spacing, then also can being configured in.In addition, the pattern of cathode layer 15 also can be net-like pattern except linear pattern.
In addition, in the 5th, the 6th embodiment, as shown in figure 16, cathode layer 15 also can form in the mode that covers organic layer 14 and anode layer 13.
Next, the display device with regard to the present invention the 7th embodiment relates to is illustrated with reference to accompanying drawing.At first, illustrate that with reference to Figure 17 the integral body of this display device constitutes.On reflective liquid crystal display part 300, engage Lighting Division 200 is arranged.Being constructed as follows of Lighting Division 200 is described.The 1st transparency carrier 10 and the 2nd transparency carrier 20 that are made of glass substrate etc., gluing by the sealant 11 that gets in all end coatings separately.The back side of the 1st transparency carrier 10 is bonded on reflective liquid crystal display part 300.
Different with the 1st embodiment, relative with the 1st transparency carrier 10 to the surface of the 2nd transparency carrier 20 be formed with organic el element 12.Whereby, organic el element 12 promptly is enclosed in the space that is surrounded by the 1st transparency carrier the 10, the 2nd transparency carrier 20 and sealant 11.In addition, organic el element 12 is formed on the zone corresponding with the pixel region 310 (with reference to Fig. 3) of reflective liquid crystal display part 300.
Part by anode layer 13 and the organic layer 14 of cathode layer double team about in the of 15 constitutes light-emitting zone.That is, be positioned at cathode layer 15 under organic layer 14 be light-emitting zone, this light-emitting zone should also have the wire shaped identical with cathode layer 15 when overlooking.By antianode layer 13 apply positive potential, anticathode layer 15 applies negative potential, light-emitting zone is luminous.
Light from described light-emitting zone towards the below shines towards reflective liquid crystal display part 300 by cathode layer 15.The major part of the light from light-emitting zone towards the top can be covered according to light shield layer 18.Thereby, at the eyes that can do one's utmost to prevent from directly to enter the observer below watching above the Lighting Division 200, and can improve the contrast of reflective liquid crystal display part 300 from the light of light-emitting zone.
In addition, because organic el element 12 can make characteristics of luminescence deterioration because of the intrusion of moisture,, preferably, form desiccant layer 16 in mode with the 2nd transparency carrier 20 opposite faces on the surface of the 1st transparency carrier 10 in order to prevent the moisture intrusion.The moisture of invading seal cavity by the sealant 11 agent layer 16 that can be dried absorbs.
For fear of by the 2nd transparency carrier 20 and towards the outer light crested of organic el element 12 incidents, desiccant layer 16 preferably, in not overlapping with organic el element 12 mode, is formed at all ends of the 1st transparency carrier 10.But, then non-ly under the situation that desiccant layer 16 is made of transparent material be confined to this.In addition, in order to prevent outer reflection of light, preferably, post antireflection film 21 at the back side of the 2nd transparency carrier 20.
In addition, as shown in figure 18, in the space that is surrounded by the 1st transparency carrier the 10, the 2nd transparency carrier 20 and sealant 11, also can fill to have and equate with the refractive index of the 1st transparency carrier or the resin 17 of refractive index about equally.Whereby, can stop the moisture of invading really by sealant 11.In addition, also can integrally formed resin 17 and sealant 11.
In addition, in structure shown in Figure 17, owing between organic el element 12 and the 1st transparency carrier 10, have air layer, so be incident to the outer light of the 2nd transparency carrier 20, meeting be reflected at the interface of air layer and the 1st transparency carrier 10, and makes the contrast deterioration of liquid crystal display.With respect to this, if according to structure shown in Figure 180, then be incident to the outer light of the 2nd transparency carrier 20, owing to can not reflect at the interface of the 1st transparency carrier 10, and can be incident to reflective liquid crystal display part 300, so can improve the contrast of liquid crystal display.In addition, in structure shown in Figure 180, also so that desiccant layer shown in Figure 17 16 to be set.
Secondly, relevant according to described Lighting Division 200 and the structure of the reflective liquid crystal display part 300 that throws light on and and the marriage relation of Lighting Division 200, be illustrated with reference to Fig. 3 and Figure 19.Fig. 3 is the partial top view of the pixel region 310 of liquid crystal display part 300, and Figure 19 is the cut-open view that the X-X line in Fig. 3 blocks.
Be formed with the TFT 31 that switch is used going up by the 3rd transparency carrier 30 (TFT substrate) that glass substrate constituted on each of set plurality of pixels.TFT 31 is covered by interlayer dielectric 32, is formed with corresponding each TFT 31 and by the reflective pixel electrode that reflecting material constituted 33 as aluminium (Al) etc. on interlayer dielectric 32.Reflective pixel electrode 33 connects drain electrode or the grid of pairing TFT 31 by the contact hole CH that is formed at interlayer dielectric 32.
Relative with the 3rd transparency carrier 30 that is formed with reflective pixel electrode 33 to, dispose the 4th transparency carrier 34 (substrate relatively) that constitutes by glass substrate.Be formed with the shared electrode 35 that constitutes by ITO on the surface of the 4th transparency carrier 34.At the back side of the 4th transparency carrier 34, being docile and obedient the preface lamination has by the diffusion light scattering layer 36 that adhesion layer constituted, reaches Polarizer 37.Light scattering layer 36 be in order to will giving scattering from the light of Lighting Division 200, and make it to be radiated at equably pixel electrode 33.Between the 4th transparency carrier 34 and the 3rd transparency carrier 30, enclose liquid crystal layer 40 is arranged.
According to described formation, then from the light of Lighting Division 200 radiation, can be according to Polarizer 37 towards the specific direction polarisation, and then be directed into liquid crystal layer 40 by light scattering layer the 36, the 4th transparency carrier 34 and shared electrode 35, and reflect according to reflective pixel electrode 33.The light of reflection according to reflective pixel electrode 33 can be via returning in identical path, and to can be observer institute visual in the gap of the line by cathode layer 15.
At this moment, according to the electric field that is applied between pixel electrode 33 and the shared electrode 35, the transmitance of light can change on each pixel.Whereby, by intensity of light reflected changes on each pixel and can realize that promptly LCD shows according to reflective pixel electrode 33.As previously described,, promptly can do one's utmost to prevent to leak, can improve the contrast of liquid crystal display from the light of the light-emitting zone of organic el element 12 according to the light shield layer 18 of Lighting Division 200.
Therefore, preferably, engage irradiation unit 200 and reflective liquid crystal display part 300, the refraction of light is reflected via resin bed 45 (for example UV hard resin-layer or visible light hard resin-layer) with refractive index identical with the 1st transparency carrier 10.
Secondly, be illustrated with regard to the configuration relation of Lighting Division 200 with the pixel of reflection type LCD 300.As shown in Figure 3, in the pixel region 310 of reflective liquid crystal display part 300, there are pixel R, G, the B of three kinds of corresponding Red Green Blues to be arranged on line direction (x) and the column direction (y).Though Fig. 3 is the residual quantity arrangement of staggering pixel R, G, B at each row, is not limited to this, also can be to arrange in the bar shaped of each row proper alignment pixel R, G, B.The line of several cathode layers 15 of Lighting Division 200 is along the border of each pixel R, G, B and extend towards line direction (x).
Each pixel has a TFT 31 and a reflective pixel electrode 33.The distance between centers of tracks P1 of the cathode layer 15 of Lighting Division 200 equates with pel spacing P2.In addition, the line of the cathode layer 15 of Lighting Division 200 and the line of light shield layer 18, preferably, be configured in the reflective pixel electrode 33 that is helpless to liquid crystal display leave region S R directly over.Whereby, just have in the major part of the light of reflective pixel electrode 33 reflection and can not covered by light shield layer 18, the gap of line that can be by several light shield layers 18 is the visual advantage of observer.
The line of light shield layer 18, though can prevent the leakage of the light that produces at light-emitting zone, but be made as greatlyyer by width W 1, promptly can reduce the leakage of light more and improve the liquid crystal display contrast more than the width W 2 of the line of cathode layer 15 with the line of light shield layer 18.
In addition, the distance between centers of tracks P1 of the cathode layer 15 of Lighting Division 200 also can be less than pel spacing P2, and with the distance between centers of tracks P1 of cathode layer 15 to the ratio of pel spacing P2 (=P1/P2) be made as 1/ natural number.When distance between centers of tracks is identical with pel spacing,, promptly can prevent these phenomenons by such setting though in liquid crystal display, can interfere line or thin water wave (moire).
In addition, otherwise the distance between centers of tracks P1 of the cathode layer 15 of Lighting Division 200 also can be greater than pel spacing P2, and distance between centers of tracks P1 is made as natural number to the ratio (P1/P2) of pel spacing P2.Promptly can prevent to interfere line or thin water wave (moire) by such setting.
In addition, as shown in Figure 5, the line of several cathode layers 15 of Lighting Division 200 also can tilt to extend with respect to line direction (x).Promptly can prevent to interfere line or thin water wave (moire) by such setting.
Next, the display device with regard to the present invention the 8th embodiment relates to is illustrated with reference to Figure 20.Figure 20 is the cut-open view that shows the marriage relation of the structure of reflective liquid crystal display part 300 and Lighting Division 200, the cut-open view that its correspondence is blocked along the X-X line among Fig. 3.As the characteristics of present embodiment, the 1st transparency carrier 10 that dual-purpose the 1st embodiment relates to and the 4th transparency carrier 34 and form a transparency carrier.That is, as shown in figure 20, the 1st transparency carrier 10 is deleted, and is formed with organic el element 12 across Polarizer 37 on the 4th transparency carrier 34.Whereby, integral thickness that promptly can the attenuate display device can reduce cost simultaneously.
Next, the display device with regard to the present invention the 9th embodiment relates to is illustrated with reference to accompanying drawing.Figure 21 is the cut-open view of the integral body of this display device.The anode layer 13 of the organic el element 12 among the 7th embodiment (with reference to Figure 17) does not have linear pattern, and with respect to this, in the present embodiment, the anode layer 13A of organic el element 12 has linear pattern.
That is, on the 2nd transparency carrier 20, be formed with several anode layers 13A, and cover these anode layers 13A and be formed with organic layer 14, and on this organic layer 14, be formed with several cathode layers 15 with same linear pattern with linear pattern.The line overlap of several anode layers 13A of the line of several cathode layers 15A and the lower floor that is formed at these.In in addition, fully identical with the 7th embodiment.
Shown in the 7th embodiment (Figure 17), when the anode layer 13 that constitutes by ITO or IZO, when being formed on the 2nd transparency carrier 20 with several not segregate patterns, just can utilize the poor of refractive index, reflect the outer light of incident according to anode layer 13, and the liquid crystal display contrast can reduce by the 2nd transparency carrier 20.With respect to this,,, can't be subjected to the reflections affect of anode layer 13A then by the light between the line of anode layer 13A if according to present embodiment.Thereby the transmitance of light can raise, and can improve the liquid crystal display contrast.
In addition, in structure shown in Figure 21, though on the surface of the 1st transparency carrier 10, be formed with desiccant layer 16 with the 2nd transparency carrier 20 opposite faces, but as shown in figure 22, also can in the space that is surrounded by the 1st transparency carrier the 10, the 2nd transparency carrier 20 and sealant 11, fill resin 17 with the refractive index that equates with the refractive index of the 1st transparency carrier.
Figure 23 is the cut-open view that shows the marriage relation of the structure of reflective liquid crystal display part 300 and Lighting Division 200, and it is equivalent to the cut-open view that corresponding X-X line in Fig. 3 blocks.The structure of reflective liquid crystal display part 300 and the 7th embodiment are identical.As previously described, the line of the cathode layer 15 of Lighting Division 200, though preferably, be configured in the reflective pixel electrode 33 that is helpless to liquid crystal display leave region S R directly over, but this situation, the also superimposed below that is configured in the line of cathode layer 15 of the line of anode layer 13A.
Constituted light-emitting zone by the part of the organic layer 14 of the line double team of the line of anode layer 13A and cathode layer 15.The line of light shield layer 18, though can prevent the light that produces at light-emitting zone leaks, but the width W 3 of line that is made as width W 2 than the line of cathode layer 15, anode layer 13A by the width W 1 with the line of light shield layer 18 is big, promptly can reduce the leakage of light more and can improve the liquid crystal display contrast more.
Next, with regard to the related display device of the 10th embodiment of the present invention, be illustrated with reference to Figure 24.Figure 24 be show reflective liquid crystal display part 300 structure and with the cut-open view of the marriage relation of Lighting Division 200, the cut-open view that its correspondence is blocked along the X-X line among Fig. 3.As the characteristics of present embodiment, the 1st transparency carrier 10 that dual-purpose the 9th embodiment relates to and the 4th transparency carrier 34 and form a transparency carrier.That is, as shown in figure 24, the 1st transparency carrier 10 is deleted, and is formed with organic el element 12 on the 4th transparency carrier 34.Whereby, integral thickness that promptly can the attenuate display device can reduce cost simultaneously.
Next, the display device with regard to the present invention the 11st embodiment relates to is illustrated with reference to accompanying drawing.Figure 25 is the cut-open view of the integral body of this display device.The anode layer 13 of the organic el element 12 among the 7th embodiment (with reference to Figure 17), organic layer 14 do not have linear pattern, and with respect to this, in the present embodiment, the anode layer 13A of organic el element 12, organic layer 14A all have linear pattern.
Promptly, on the 2nd transparency carrier 20, be formed with several anode layers 13A with linear pattern across light shield layer 18, several organic layers 14A with linear pattern is arranged at these anode layers 13A superimposed layer, and on these organic layers 14A, be formed with several cathode layers 15 with same linear pattern.The line of several cathode layers 15A and the line of several organic layers 14A of the lower floor that is formed at these, the line overlap of several anode layers 13A.In addition, fully identical with the 7th embodiment.
Shown in the 7th embodiment (Figure 17), when the anode layer 13 that constitutes by ITO or IZO, when being formed on the 2nd transparency carrier 20 with non-linear pattern, just can utilize the poor of refractive index, reflect the outer light of incident or the light of generation on organic el element 12 according to anode layer 13, and the liquid crystal display contrast can reduce by the 2nd transparency carrier 20.In addition, same reflection also can take place in organic layer 14.
With respect to this,,, can't be subjected to the reflections affect of these layers then by the light between the line of anode layer 13A, organic layer 14A if according to present embodiment.Thereby the transmitance of light can raise, and can improve the liquid crystal display contrast.
In addition, in structure shown in Figure 25, though on the surface of the 1st transparency carrier 10, be formed with desiccant layer 16 with the 2nd transparency carrier 20 opposite faces, but as shown in figure 26, also in the space that can be surrounded by the 1st transparency carrier the 10, the 2nd transparency carrier 20 and sealant 11, fill resin 17 with the refractive index that equates with the refractive index of the 1st transparency carrier.
Figure 27 is the cut-open view that shows the marriage relation of the structure of reflective liquid crystal display part 300 and Lighting Division 200, and it is equivalent to the cut-open view that corresponding X-X line in Fig. 3 blocks.Structure among the structure of reflective liquid crystal display part 300 and the 7th embodiment is identical.As previously described, the light shield layer 18 of Lighting Division 200, the line of cathode layer 15, preferably, be configured in the leaving directly over the region S R of the reflective pixel electrode 33 that is helpless to liquid crystal display, but this situation, the also superimposed below that is configured in the line of cathode layer 15 of the line of the line of organic layer 14A and anode layer 13A.Constituted light-emitting zone by the line of the organic layer 14A of the line double team of the line of anode layer 13A and cathode layer 15.The line of light shield layer 18, though leak with the light that prevents to be produced at light-emitting zone, but the width W 4 of line that is made as the width W 3 of line of width W 2 than the line of cathode layer 15, anode layer 13A and organic layer 14A by the width W 1 with the line of light shield layer 18 is big, promptly can reduce the leakage of light more and can improve the liquid crystal indication more.
Next, just the related display device of the present invention the 12nd embodiment is illustrated with reference to Figure 28.Figure 28 is the cut-open view that shows the marriage relation of the structure of reflective liquid crystal display part 300 and Lighting Division 200, the cut-open view that its correspondence is blocked along the X-X line among Fig. 3.As the characteristics of present embodiment, the 1st transparency carrier 10 that dual-purpose the 11st embodiment relates to and the 4th transparency carrier 34 and form a transparency carrier.That is as shown in figure 28, the 1st transparency carrier 10 is deleted, and is formed with organic el element 12 on the 4th transparency carrier 34.Whereby, thickness that promptly can the attenuate display device can reduce cost simultaneously.
In the 11st and the 12nd embodiment, organic el element 12 also can have cross-sectional configuration shown in Figure 29.That is, the width of the line of anode layer 13A is less than light shield layer 18, and the width of the line of organic layer 14A is less than the width of the line of anode layer 13A, and the width of the line of cathode layer 15 is less than the width of the line of organic layer 14A.
In addition, in the 9th, the 10th and the 12nd embodiment, as shown in figure 30, cathode layer 15 be by the aluminium formed situations of opaque light screening material such as (Al) under because the function that also has as light shield layer of cathode layer 15 itself, so do not need light shield layer 18.In this case, organic el element 12 is to be docile and obedient the preface lamination to have cathode layer 15, organic layer 14A, anode layer 13A to constitute on the 2nd transparency carrier 20.And the width of organic layer 14A is greater than the width of anode layer 13A, and the width of cathode layer 15 is greater than the width of organic layer 14A.
In addition, in the 7th to the 12nd embodiment, cathode layer 15 passes through to adjust its spacing with the line of light shield layer 18, also leaves on the region S R reflective pixel electrode 33 in addition to be configured in.In addition, cathode layer 15 can be net-like pattern with the pattern of light shield layer 18 except linear pattern.
Next, the display device with regard to the present invention the 13rd embodiment relates to is illustrated with reference to Figure 32.Figure 32 is the cut-open view that shows the marriage relation of the structure of reflective liquid crystal display part 300 and Lighting Division 200.Characteristics as present embodiment, on the 2nd transparency carrier 20, dispose cathode layer 15 with specific pattern, and cover this cathode layer 15 and be formed with organic layer 14, and on this organic layer 14, be formed with the anode layer 13 that constitutes by trnaslucent materials or transparent material.The pattern of cathode layer 15 is a wire, or is point-like as shown in figure 33.Cathode layer 15 is formed the function that cathode layer 15 itself also has as light shield layer by aluminium opaque light screening materials such as (Al).Other formation is identical with the 7th to the 12nd embodiment.
Next, the display device with regard to the present invention the 14th embodiment relates to is illustrated with reference to Figure 34.Figure 34 is the cut-open view that shows the marriage relation of the structure of reflective liquid crystal display part 300 and Lighting Division 200.Present embodiment and the 13rd embodiment difference are on the 2nd transparency carrier 20, be formed with transparent electrode layer 50, and dispose the cathode layer 15 with specific pattern on this transparent electrode layer 50.In addition, between transparent electrode layer 50 and cathode layer 15, dispose insulation course 51, electrically contact and transparent electrode layer 50 is constituted with cathode layer 15 at the position that does not dispose insulator layer 51.The pattern of cathode layer 15 is identical with the 13rd embodiment, is wire or point-like.
Claims (6)
1. display device is characterized by:
Possesses the Lighting Division that is configured on the reflective liquid crystal display part;
Described Lighting Division possesses:
The 1st substrate, the back side are bonded on described reflective liquid crystal display part;
The 2nd substrate engages by sealant;
Organic EL component, be disposed at the surface of described the 2nd substrate, and this organic EL component has anode layer, covers this anode layer and the organic layer that forms and the cathode layer that has specific pattern and be formed on this organic layer and be made of the semitransparent electrode material; And
Light shield layer, the lower floor that it has the pattern corresponding with described cathode layer and is formed at described anode layer is in order to cover the light that produces from described organic EL component;
Described reflective liquid crystal display part possesses:
The 3rd substrate, it has plurality of pixels, and among accepting to be formed at each pixel from the reflection of light pixel electrode that described organic EL component produced;
The 4th substrate is disposed on described the 3rd substrate and its surface is formed with shared electrode; And
Liquid crystal layer is enclosed between described the 3rd substrate and described the 4th substrate;
Described anode layer and described organic layer have specific pattern, and the width of described anode layer is greater than the width of described cathode layer and the width of described organic layer.
2. display device according to claim 1 is characterized by, and described the 1st substrate and described the 4th substrate dual-purpose also are made of a substrate.
3. display device according to claim 1 is characterized by, the surface of described the 1st substrate have with the surperficial relative desiccant layer that mode was disposed of described the 2nd substrate.
4. display device according to claim 1 is characterized by, and is desiccant-filled or have a resin with the refractive index refractive index about equally of described the 2nd substrate between the described the 1st and the 2nd substrate.
5. display device according to claim 1 is characterized by, and the pass of the width of described cathode layer, described anode layer and described organic layer is described cathode layer＜described organic layer＜described anode layer.
6. display device according to claim 1 is characterized by, and the width of described light shield layer is greater than the width of described anode layer.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
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| JP2005148489 | 2005-05-20 | ||
| JP2005148490 | 2005-05-20 | ||
| JP2005148490 | 2005-05-20 | ||
| JP2005-148489 | 2005-05-20 | ||
| JP2005148489 | 2005-05-20 | ||
| JP2005-148490 | 2005-05-20 | ||
| JP2006124049 | 2006-04-27 | ||
| JP2006-124049 | 2006-04-27 | ||
| JP2006124049A JP4932317B2 (en) | 2005-05-20 | 2006-04-27 | Display device |
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| CNB2006100825917A Division CN100514151C (en) | 2005-05-20 | 2006-05-18 | Display device |
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| CN101369070B true CN101369070B (en) | 2011-03-02 |
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| TWI410167B (en) | 2009-09-17 | 2013-09-21 | Prime View Int Co Ltd | Front light plate |
| CN102052579B (en) * | 2009-11-05 | 2013-06-19 | 元太科技工业股份有限公司 | Front light plate |
| DE112012003100T5 (en) * | 2011-07-27 | 2014-04-10 | Panasonic Corp. | Organic electroluminescent element |
| CN107065371B (en) | 2017-01-23 | 2023-10-10 | 京东方科技集团股份有限公司 | Double-sided multifunctional device and display method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5796509A (en) * | 1996-08-21 | 1998-08-18 | International Business Machines Corporation | Thin film frontlighting and backlighting for spatial light modulators |
| US6556260B1 (en) * | 1999-03-17 | 2003-04-29 | Hitachi, Ltd. | Liquid crystal display apparatus |
| CN1446035A (en) * | 2002-03-18 | 2003-10-01 | 精工爱普生株式会社 | Organic El element and manufacturing method thereof and display device |
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2006
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5796509A (en) * | 1996-08-21 | 1998-08-18 | International Business Machines Corporation | Thin film frontlighting and backlighting for spatial light modulators |
| US6556260B1 (en) * | 1999-03-17 | 2003-04-29 | Hitachi, Ltd. | Liquid crystal display apparatus |
| CN1446035A (en) * | 2002-03-18 | 2003-10-01 | 精工爱普生株式会社 | Organic El element and manufacturing method thereof and display device |
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| CN101369070A (en) | 2009-02-18 |
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