KR100763061B1 - Display device - Google Patents

Abstract

In the display device provided with the lighting device as the front light, high contrast can be achieved. The lighting unit 200 is bonded to the reflective liquid crystal display 300. The transparent substrate 10 made of a glass substrate or the like and the second transparent substrate 20 are bonded to each other via a seal layer 11 applied to the main end of each other. The back surface of the first transparent substrate 10 is bonded to the reflective liquid crystal display 300, and the organic EL element 12 is formed on the surface of the first transparent substrate. The organic EL element 12 is enclosed in a space surrounded by the first transparent substrate 10, the second transparent substrate 20, and the seal layer 11. The organic EL element 12 is formed in a region corresponding to the pixel region 310 of the reflective liquid crystal display 300. In addition, a desiccant layer 16 is formed on the surface of the second transparent substrate 20.

Reflective liquid crystal display device, transparent substrate, seal layer, pixel region, desiccant layer, organic EL element

Description

Display device {DISPLAY DEVICE}

1 is a first cross-sectional view of a display device according to a first exemplary embodiment of the present invention.

2 is a second cross-sectional view of a display device according to a first exemplary embodiment of the present invention.

3 is a plan view of a portion of the pixel region 310 of the reflective liquid crystal display 300.

4 is a cross-sectional view taken along the line X-X of FIG.

5 is a plan view of a portion of the pixel region 310 of the reflective liquid crystal display 300.

6 is a cross-sectional view of a display device according to a second exemplary embodiment of the present invention.

7 is a first cross-sectional view of a display device according to a third exemplary embodiment of the present invention.

8 is a second cross-sectional view of a display device according to a third exemplary embodiment of the present invention.

9 is a third cross-sectional view of a display device according to a third exemplary embodiment of the present invention.

10 is a cross-sectional view of a display device according to a fourth exemplary embodiment of the present invention.

11 is a first cross-sectional view of a display device according to a fifth exemplary embodiment of the present invention.

12 is a second cross-sectional view of a display device according to a fifth exemplary embodiment of the present invention.

13 is a third cross-sectional view of a display device according to a fifth exemplary embodiment of the present invention.

Fig. 14 is a sectional view of an organic EL element of a display device according to a fifth embodiment of the present invention.

15 is a cross-sectional view of a display device according to a sixth exemplary embodiment of the present invention.

16 is a cross-sectional view of the organic EL element 12.

17 is a first cross-sectional view of a display device according to a seventh exemplary embodiment of the present invention.

18 is a second cross-sectional view of a display device according to a seventh exemplary embodiment of the present invention.

19 is a cross-sectional view taken along the line X-X of FIG.

20 is a cross-sectional view of a display device according to an eighth embodiment of the invention.

FIG. 21 is a first cross-sectional view of a display device according to a ninth embodiment.

FIG. 22 is a second cross-sectional view of a display device according to a ninth embodiment.

FIG. 23 is a third cross-sectional view of a display device according to a ninth embodiment.

24 is a cross-sectional view of a display device according to a tenth exemplary embodiment of the present invention.

25 is a first cross-sectional view of a display device according to an eleventh embodiment of the present invention.

26 is a second cross-sectional view of a display device according to an eleventh embodiment of the present invention.

27 is a third cross-sectional view of a display device according to an eleventh embodiment of the present invention.

28 is a cross-sectional view of a display device according to a twelfth embodiment of the present invention.

29 is a cross-sectional view of an organic EL element.

30 is a cross-sectional view of an organic EL element.

31 shows a reflective LCD with a front light formed thereon.

32 is a cross-sectional view of a display device according to a thirteenth embodiment.

33 is a pattern diagram of a cathode layer of a display device according to a thirteenth embodiment;

34 is a cross-sectional view of a display device according to a fourteenth embodiment.

<Explanation of symbols for main parts of the drawings>

10: first transparent substrate

11: seal floor

12: organic EL device

13: anode layer

14: organic layer

15: cathode layer

16: desiccant layer

17: resin

20: second transparent substrate

21: antireflection layer

30: third transparent substrate

31: thin film transistor (TFT)

32: interlayer insulation film

33: pixel electrode

34: fourth transparent substrate

35: common electrode

36: light scattering layer

37: polarizer

40: liquid crystal layer

45 resin layer

200: lighting unit

300: liquid crystal display

[Patent Document 1] Japanese Patent Application Laid-Open No. 5-325586

[Patent Document 2] Japanese Patent Application Laid-Open No. 2003-25537

The present invention relates to a display device including an illumination portion on a reflective liquid crystal display portion.

Liquid crystal display devices (hereinafter referred to as LCDs) are thin and have low power consumption, and are widely used as monitors of computer and portable information devices such as mobile phones. LCDs include transmissive LCDs, reflective LCDs, and transflective LCDs.

The transmissive LCD uses a transparent electrode as a pixel electrode for applying a voltage to the liquid crystal, arranges a backlight behind the LCD, and controls the amount of transmitted light of the backlight, thereby enabling bright display even in dark surroundings. However, there is a characteristic that sufficient contrast cannot be secured in an environment with strong external light such as outdoors during the daytime.

The reflective LCD uses external light such as sunlight or indoor light as a light source, and reflects these external light incident on the LCD by a reflective pixel electrode made of a reflective layer formed on the substrate on the observation surface side. Then, display is performed by controlling the amount of emitted light from the LCD panel of light incident on the liquid crystal and reflected by the reflective pixel electrode for each pixel. Since the reflective LCD uses external light as a light source, there is a problem that display cannot be performed in an environment without external light.

The semi-transmissive LCD has both a transmissive function and a reflective function, and can cope with both bright and dark environments. However, this semi-transmissive LCD has a problem that display efficiency per pixel is poor because it has a transmission region and a reflection region in one pixel.

Therefore, it has been considered that the front light is provided in the reflective LCD to enable the display even in a dark environment. Fig. 31 shows a reflective LCD provided with a front light. A transparent acrylic plate 110 is disposed opposite the display surface of the reflective LCD 100. A plurality of inverted triangular grooves 111 are formed on the surface opposite to the surface facing the reflective LCD of the transparent acrylic plate 110. In addition, a light source 112 is disposed on the side surface of the transparent acrylic plate 110. Light introduced from the light source 112 to the transparent acrylic plate 110 is refracted in the direction of the reflective LCD 100 on the inclined surface of the groove 111 and is incident on the display surface of the reflective LCD 100.

However, the light introduced from the light source 112 into the transparent acrylic plate 110 is refracted in the direction of the reflective LCD 100 at the inclined surface of the groove 111 formed in the transparent acrylic plate 110, and is different from that. Since the light is slightly refracted in the direction of the observer 113 in the reverse direction, the light leaks out of the transparent acrylic 110 and enters the observer's eye, thereby reducing the contrast of the LCD.

The main features of the present invention are as follows.

A 1st characteristic structure of the display apparatus of this invention is equipped with the illumination part arrange | positioned on a reflective liquid crystal display part, The said illumination part is a said 1st board | substrate with which the back surface was joined by the said reflective liquid crystal display part, and the said seal | sticker via the seal layer. A second substrate bonded to the first substrate, an anode layer disposed on the surface of the first substrate and having a predetermined pattern made of a transparent electrode material, an organic layer formed by covering the anode layer, and the organic layer An organic electroluminescent element having a cathode layer formed with a pattern overlapping the anode layer, wherein the reflective liquid crystal display has a plurality of pixels and is configured to receive light generated from the organic electroluminescent element A third substrate having a pixel electrode formed in each pixel, a fourth substrate disposed on the third substrate, and having a common electrode formed on the surface thereof, and a rod between the third substrate and the fourth substrate; A to a liquid crystal layer.

The 2nd characteristic structure of the display apparatus of this invention is equipped with the illumination part arrange | positioned on a reflective liquid crystal display part, The said illumination part is bonded together through the 1st board | substrate with which the back surface was bonded by the said reflective liquid crystal display part, and the seal layer. A cathode disposed on the second substrate, the surface of the second substrate, the anode layer, the organic layer formed by covering the anode layer 13, and formed with a predetermined pattern on the organic layer, and made of a semi-transparent electrode material. And an organic electroluminescent element having a layer, and a light shielding layer formed under the anode layer with a pattern corresponding to the cathode layer, to shield light generated from the organic electroluminescent element, wherein The reflective liquid crystal display has a plurality of pixels, and a third substrate having reflection pixel electrodes receiving light generated from the organic electroluminescent element in each pixel, and the third substrate. It is provided on the 4th board | substrate with a common electrode formed in the surface, and the liquid crystal layer enclosed between the said 3rd board | substrate and a 4th board | substrate.

A third characteristic constitution of the display device of the present invention includes an illumination unit disposed on a reflective liquid crystal display unit, and the illumination unit is bonded to the reflective liquid crystal display unit through a first substrate having a back surface bonded thereto and a seal layer. A second substrate, a cathode layer disposed on the surface of the second substrate, having a predetermined pattern, an organic layer formed by covering the cathode layer, and an anode layer made of a translucent material or a transparent material via the organic layer; A third substrate having an organic electroluminescent element, wherein the reflective liquid crystal display portion has a plurality of pixels, and a reflective pixel electrode receiving light generated from the organic electroluminescent element is formed in each pixel; It is provided with the 4th board | substrate arrange | positioned on a 3 board | substrate, and the common electrode was formed in the surface, and the liquid crystal layer enclosed between the said 3rd board | substrate and a 4th board | substrate.

<Example>

Next, a display device according to a first embodiment of the present invention will be described with reference to the drawings. First, with reference to FIG. 1, the whole structure of this display apparatus is demonstrated. The illumination unit 200 is bonded to the reflective liquid crystal display unit 300. The configuration of the lighting unit 200 is as follows. The 1st transparent substrate 10 and the 2nd transparent substrate 20 which consist of a glass substrate etc. are adhere | attached through the sealing layer 11 which consists of resin etc. apply | coated to the principal-end part of each other.

The rear surface of the first transparent substrate 10 is bonded to the reflective liquid crystal display 300, and the organic electroluminescent element 12 (hereinafter referred to as the "organic EL element 12") is attached to the surface of the first transparent substrate 10. ”) Is formed. As a result, the organic EL element 12 is enclosed in a space surrounded by the first transparent substrate 10, the second transparent substrate 20, and the seal layer 11. In addition, the organic EL element 12 is formed in a region corresponding to the pixel region 310 (see FIG. 3) of the reflective liquid crystal display unit 300.

The organic EL element 12 has an anode layer 13 formed on the first transparent substrate 10, an organic layer 14 formed by covering the anode layer 13, and a line shape on the organic layer 14. It has a plurality of cathode layers 15 formed with a pattern of. The anode layer 13 is made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO). The organic layer 14 consists of an electron carrying layer, a light emitting layer, and a positive hole transport layer. The cathode layer 15 is, for example, an aluminum layer (Al layer) or a laminate composed of a magnesium layer (Mg layer) and a silver layer (Ag layer). Here, it is preferable that the thickness of the anode layer 13 is 100 nm, the thickness of the organic layer 14 is 200 nm, and the thickness of the cathode layer 15 is 500 nm.

Portions of the organic layer 14 sandwiched above and below the anode layer 13 and the cathode layer 15 serve as light emitting regions. In other words, the organic layer 14 directly below the cathode layer 15 is a light emitting region, and the light emitting region also has the same line shape as the cathode layer 15 in plan view. The light emitting region emits light by applying a positive potential to the anode layer 13 and a negative potential to the cathode layer 15.

The light directed downward from the light emitting region is irradiated to the reflective liquid crystal display 300 through the transparent anode layer 13 and the first transparent substrate 10. Most of the light directed upward from the light emitting region is reflected downward by the cathode layer 15 and irradiated to the reflective liquid crystal display 300 through the transparent anode layer 13 and the first transparent substrate 10. Therefore, the direct entry of the light from the light emitting region into the eyes of the observer looking downward from the upper side of the illuminating unit 200 can be prevented as much as possible, thereby increasing the contrast of the reflective liquid crystal display unit 300.

After forming the transparent conductive material, such as ITO and IZO, on the 1st transparent substrate 10, the anode layer 13 can be formed in a desired area | region by using photoetching technique. In addition, the organic layer 14 and the cathode layer 15 can be formed in a desired region by the vapor deposition method using a mask.

In addition, the organic EL element 12 is deteriorated in light emission characteristics due to intrusion of moisture, so that the desiccant layer 16 faces the first transparent substrate 10 on the surface of the second transparent substrate 20 in order to prevent this. It is preferable to form Water penetrating into the sealing space through the seal layer 11 is absorbed by the desiccant layer 16.

The desiccant layer 16 is the second transparent substrate 20 so as not to overlap with the organic EL element 12 in order to avoid blocking external light incident on the organic EL element 12 through the second transparent substrate 20. It is preferable to form at the major end of. However, when the desiccant layer 16 consists of a transparent material, it does not fall in this range. Moreover, in order to prevent reflection of external light, it is preferable that the anti-reflective film 21 is adhere | attached on the back surface of the 2nd transparent substrate 20. FIG.

In addition, as shown in FIG. 2, in a space surrounded by the first transparent substrate 10, the second transparent substrate 20, and the seal layer 11, the refractive index equal to or approximately the same as the refractive index of the first transparent substrate. You may fill resin 17 which has a. In addition, the resin 17 and the seal layer 11 may be formed integrally.

Thereby, the water which permeates through the seal layer 11 can be reliably blocked. In addition, in the structure of FIG. 1, since an air layer exists between the organic EL element 12 and the 2nd transparent substrate 20, the external light which entered the 2nd transparent substrate 20 is an air layer and a 2nd transparent substrate ( Reflected at the interface of 20), the contrast of the liquid crystal display deteriorates. On the other hand, according to the structure of FIG. 2, since external light incident on the second transparent substrate 20 is not reflected at the interface of the second transparent substrate 20 and is incident on the reflective liquid crystal display 300, the contrast of the liquid crystal display is increased. Is improved. In addition, in the structure of FIG. 2, you may form the desiccant layer 16 of FIG.

Next, the structure of the reflective liquid crystal display 300 illuminated by the above-described lighting unit 200 and the coupling relationship with the lighting unit 200 will be described with reference to FIGS. 3 and 4. 3 is a plan view of a part of the pixel region 310 of the liquid crystal display 300, and FIG. 4 is a cross-sectional view taken along the line X-X of FIG. 3. A thin film transistor 31 for switching (hereinafter referred to as TFT) is formed in each of a plurality of pixels formed on the third transparent substrate 30 (TFT substrate) made of a glass substrate. The TFT 31 is covered with an interlayer insulating film 32, and a reflective pixel electrode 33 made of a reflective material such as aluminum (Al) is formed on the interlayer insulating film 32 in correspondence with each TFT 31. . The reflective pixel electrode 33 is connected to the drain or source of the corresponding TFT 31 through the contact hole CH formed in the interlayer insulating film 32.

A fourth transparent substrate 34 (opposing substrate) made of a glass substrate is disposed to face the third transparent substrate 30 on which the reflective pixel electrode 33 is formed. The common electrode 35 made of ITO is formed on the surface of the fourth transparent substrate 34. On the surface of the fourth transparent substrate 34, a light scattering layer 36 made of a diffusion adhesive layer and a polarizing plate 37 are laminated in this order. The light scattering layer 36 scatters the light from the illumination unit 200 so as to uniformly irradiate the pixel electrode 33. The liquid crystal layer 40 is sealed between the fourth transparent substrate 34 and the third transparent substrate 30.

According to the above-described configuration, the light emitted from the illumination unit 200 is polarized in a predetermined direction by the polarizing plate 37, and the light scattering layer 36, the fourth transparent substrate 34, and the common electrode 35. It passes through and is introduced into the liquid crystal layer 40, and is reflected by the reflective pixel electrode 33. The light reflected by the reflective pixel electrode 33 is returned to the viewer through the gap between the lines of the cathode layer 15 by reversely returning the same path.

At this time, the transmittance of light is changed for each pixel by an electric field applied between the pixel electrode 33 and the common electrode 35. As a result, the LCD display can be realized by changing the intensity of light reflected by the reflective pixel electrode 33 for each pixel. As described above, since the cathode layer 15 of the lighting unit 200 functions as a light shielding layer, leakage of light from the light emitting region of the organic EL element 12 is prevented as much as possible, thereby increasing the contrast of the liquid crystal display. have.

The lighting unit 200 is preferably disposed close to the upper side of the reflective liquid crystal display 300. However, if there is an air layer between the irradiation unit 200 and the reflective liquid crystal display unit 300, when the light emitted from the first transparent substrate 10 of the illumination unit 200 enters the air layer, the first transparent substrate 10 and Reflected at the interface of the air layer, the reflected light is returned to the observer side, and there is a risk of reducing the contrast.

Therefore, the irradiation apparatus 200 and the reflective liquid crystal display part 300 are bonded through the resin layer 45 (for example, UV curable resin layer or visible light curable resin layer) which has the same refractive index as the 1st transparent substrate 10. FIG. By doing so, it is preferable to reflect the refraction of light.

Next, the arrangement relationship between the illumination unit 200 and the pixels of the reflective LCD 300 will be described. As shown in FIG. 3, in the pixel region 310 of the reflective liquid crystal display 300, three kinds of pixels R, G, and B corresponding to three primary colors of red, green, and blue are in the row direction (x) and the column direction. It is arranged as (y). 3 is a delta array in which pixels R, G, and B are shifted in each row, but the present invention is not limited to this, and may be a stripe array in which pixels R, G, and B are aligned in rows. The lines of the plurality of cathode layers 15 of the lighting unit 200 extend in the row direction x along the boundaries of the pixels R, G, and B. As shown in FIG.

Each pixel has one TFT 31 and one reflective pixel electrode 33. The pitch P1 of the line of the cathode layer 15 of the lighting unit 200 is equal to the pitch P2 of the pixel. In addition, it is preferable that the line of the cathode layer 15 of the illumination part 200 is arrange | positioned immediately above the space | interval area SR of the reflective pixel electrode 33 which does not contribute to a liquid crystal display. As a result, most of the light reflected by the reflective pixel electrode 33 is not blocked by the cathode layer 15 but has an advantage of being visible to the viewer through the gaps in the lines of the plurality of cathode layers 15.

The pitch P1 of the line of the cathode layer 15 of the illumination unit 200 is smaller than the pitch P2 of the pixel, and the ratio of the pitch P1 of the line of the cathode layer 15 to the pitch P2 of the pixel (= P1 / P2). ) May be 1 / natural number. If the pitch of the line and the pitch of the pixel are the same, interference fringes or moire fringes occur in the liquid crystal display, but these phenomena can be prevented by setting in this way.

On the contrary, the pitch P1 of the cathode layer 15 of the lighting unit 200 is larger than the pitch P2 of the pixel, and the ratio P1 / P2 of the pitch P1 of the line to the pitch P2 of the pixel may be a natural number. By such setting, interference fringes and moire fringes can be prevented.

In addition, as shown in FIG. 5, the lines of the plurality of cathode layers 15 of the illumination unit 200 may extend obliquely with respect to the row direction x. By setting in this way, interference fringes and Moire fringes can be prevented.

Next, a display device according to a second embodiment of the present invention will be described with reference to FIG. 6. 6 is a cross-sectional view showing the structure of the reflective liquid crystal display unit 300 and the coupling relationship with the illumination unit 200, and corresponds to the cross-sectional view taken along the line X-X of FIG. The feature of the present embodiment is that the first transparent substrate 10 and the fourth transparent substrate 34 of the first embodiment are used as one transparent substrate. That is, as shown in FIG. 6, the first transparent substrate 10 is deleted, and the organic EL element 12 is formed on the fourth transparent substrate 34. As a result, not only the thickness of the entire display device can be reduced, but also the cost can be reduced.

Next, a display device according to a third embodiment of the present invention will be described with reference to the drawings. 7 is a cross-sectional view of the entire display device. While the anode layer 13 of the organic EL element 12 of the first embodiment (see FIG. 1) does not have a line-shaped pattern, in this embodiment, the anode layer of the organic EL element 12 ( 13A) has a line-shaped pattern.

That is, a plurality of anode layers 13A having a line-shaped pattern are formed on the first transparent substrate 10, and the organic layers 14 are formed by covering the anode layers 13A, and the organic layers 14 are formed. On the top, a plurality of cathode layers 15 having the same line pattern are formed. The lines of the plurality of cathode layers 15A and the lines of the plurality of anode layers 13A formed in these lower layers overlap. About a point other than this, it is the same as that of the 1st Example.

As in the first embodiment (FIG. 1), when the anode layer 13 made of ITO or IZO is formed in a pattern that is not separated into a plurality of parts on the first transparent substrate 10, the refractive index is different. External light incident on the transparent substrate 20 or light generated by the organic EL element 12 is reflected by the anode layer 13, and the contrast of the liquid crystal display is reduced. In contrast, according to the present embodiment, the light passing between the lines of the anode layer 13A is not affected by the reflection by the anode layer 13A. Therefore, the transmittance | permeability of light can raise and the contrast of a liquid crystal display can be improved.

In the structure of FIG. 7, the desiccant layer 16 is formed on the surface of the second transparent substrate 20 so as to face the first transparent substrate 10, but as shown in FIG. 8, the first transparent substrate. Resin 17 having the same refractive index as that of the first transparent substrate may be filled in the space surrounded by (10) and the second transparent substrate 20 and the seal layer 11.

FIG. 9 is a cross-sectional view showing the structure of the reflective liquid crystal display unit 300 and the coupling relationship with the illumination unit 200, and corresponds to the cross-sectional view taken along the line X-X in FIG. The structure of the reflective liquid crystal display 300 is entirely the same as in the first embodiment. As described above, it is preferable that the line of the cathode layer 15 of the lighting unit 200 is disposed directly above the spaced region SR of the reflective pixel electrode 33 which does not contribute to the liquid crystal display, but in this case, the anode layer The line of 13A is also disposed below the line of the cathode layer 15. The portion of the organic layer 14 sandwiched by the line of the anode layer 13A and the line of the cathode layer 15 becomes a light emitting region. Although the line of the cathode layer 15 prevents the leakage of light generated in the light emitting region, the light leakage is reduced by making the width W1 of the line of the cathode layer 15 larger than the width W2 of the line of the anode layer 13A. The contrast of the liquid crystal display can be further improved.

Next, a display device according to a fourth embodiment of the present invention will be described with reference to FIG. 10. FIG. 10 is a cross-sectional view illustrating the structure of the reflective liquid crystal display 300 and the coupling relationship with the illumination unit 200, and corresponds to a cross-sectional view taken along the line X-X of FIG. 3. The feature of the present embodiment is that the first transparent substrate 10 and the fourth transparent substrate 34 of the third embodiment are also used as one transparent substrate. That is, as shown in FIG. 10, the first transparent substrate 10 is removed, and the organic EL element 12 is formed on the fourth transparent substrate 34. As a result, not only the thickness of the entire display device can be reduced, but also the cost can be reduced.

Next, a display device according to a fifth embodiment of the present invention will be described with reference to the drawings. 11 is a cross-sectional view of the entire display device. The anode layer 13 and the organic layer 14 of the organic EL element 12 of the first embodiment (see FIG. 1) do not have a line-shaped pattern. In this embodiment, the organic EL element 12 The anode layer 13A and the organic layer 14A each have a linear pattern.

That is, a plurality of anode layers 13A having a line-shaped pattern are formed on the first transparent substrate 10, and a plurality of organic layers 14A having a line-shaped pattern are laminated on these anode layers 13A. The plurality of cathode layers 15 having the same line-like pattern are formed on these organic layers 14A. The lines of the plurality of cathode layers 15A, the lines of the plurality of organic layers 14A formed below these layers, and the lines of the plurality of anode layers 13A overlap. About a point other than this, it is the same as that of the 1st Example.

As in the first embodiment (Fig. 1), when the anode layer 13 made of ITO or IZO is formed in a non-line pattern on the first transparent substrate 10, the second transparent substrate ( External light incident through 20) or light generated in the organic EL element 12 is reflected by the anode layer 13, and the contrast of the liquid crystal display is reduced. In addition, the same reflection occurs also in the organic layer 14.

In contrast, according to the present embodiment, the light passing between the lines of the anode layer 13A and the organic layer 14A is not affected by the reflection by these layers. Therefore, the transmittance | permeability of light can raise and the contrast of a liquid crystal display can be improved.

In addition, in the structure of FIG. 11, although the desiccant layer 16 is formed in the surface of the 2nd transparent substrate 20 so that the 1st transparent substrate 10 may be facing, as shown in FIG. 12, a 1st transparent substrate Resin 17 having the same refractive index as that of the first transparent substrate may be filled in the space surrounded by (10) and the second transparent substrate 20 and the seal layer 11.

FIG. 13 is a cross-sectional view showing the structure of the reflective liquid crystal display unit 300 and the coupling relationship with the illumination unit 200, and corresponds to the cross-sectional view taken along the line X-X in FIG. The structure of the reflective liquid crystal display 300 is entirely the same as in the first embodiment. As described above, it is preferable that the line of the cathode layer 15 of the illumination unit 200 is disposed directly above the spaced region SR of the reflective pixel electrode 33 which does not contribute to the liquid crystal display, but in this case, the organic layer ( The line of 14A and the line of the anode layer 13A are also overlapped below the line of the cathode layer 15. The line of the organic layer 14A sandwiched by the line of the anode layer 13A and the line of the cathode layer 15 becomes a light emitting area. The line of the cathode layer 15 prevents the leakage of light generated in the light emitting region, but the width W1 of the line of the cathode layer 15 is the width W3 of the line of the organic layer 14A, and the width of the line of the anode layer 13A. By making it larger than W4, light leakage can be made smaller and the contrast of a liquid crystal display can be improved further.

As shown in FIG. 14, the distance L between the edge of the line of the cathode layer 15 and the edge of the line of the organic layer 14A is larger than the thickness T of the organic layer 14A to reduce light leakage. Is preferred. In addition, the width W3 of the line of the organic layer 14A may be larger than the width W4 of the line of the anode layer 13A.

Next, a display device according to a sixth embodiment of the present invention will be described with reference to FIG. 15. FIG. 15 is a cross-sectional view showing the structure of the reflective liquid crystal display unit 300 and the coupling relationship with the illumination unit 200, and corresponds to the cross-sectional view taken along the line X-X of FIG. The feature of the present embodiment is that the first transparent substrate 10 and the fourth transparent substrate 34 of the fifth embodiment are also used as one transparent substrate. That is, as shown in FIG. 15, the first transparent substrate 10 is removed, and the organic EL element 12 is formed on the fourth transparent substrate 34. As a result, not only the thickness of the entire display device can be reduced, but also the cost can be reduced.

In addition, the line of the cathode layer 15 can be arrange | positioned on the reflective pixel electrode 33 other than the space | interval area SR by adjusting the pitch. The pattern of the cathode layer 15 may be a mesh-shaped pattern in addition to the line-shaped pattern.

In the fifth and sixth embodiments, as shown in FIG. 16, the cathode layer 15 may be formed so as to cover the organic layer 14 and the anode layer 13.

Next, a display device according to a seventh embodiment of the present invention will be described with reference to the drawings. First, with reference to FIG. 17, the whole structure of this display apparatus is demonstrated. The illumination unit 200 is bonded to the reflective liquid crystal display unit 300. The configuration of the lighting unit 200 is as follows. The 1st transparent substrate 10 and the 2nd transparent substrate 20 which consist of glass substrates, etc. are adhere | attached through the seal layer 11 apply | coated to the principal end part of each other. The back surface of the first transparent substrate 10 is bonded to the reflective liquid crystal display 300.

Unlike the first embodiment, the organic EL element 12 is formed on the surface of the second transparent substrate 20 facing the first transparent substrate 10. As a result, the organic EL element 12 is enclosed in a space surrounded by the first transparent substrate 10, the second transparent substrate 20, and the seal layer 11. In addition, the organic EL element 12 is formed in a region corresponding to the pixel region 310 (see FIG. 3) of the reflective liquid crystal display unit 300.

The organic EL element 12 is top emission type, an anode layer 13 formed on the second transparent substrate 20, an organic layer 14 formed by covering the anode layer 13, and this organic layer 14. ) Has a plurality of cathode layers 15 formed with a line-shaped pattern. Further, a plurality of light shielding layers 18 having a line-shaped pattern corresponding to the cathode layer 15 and shielding light generated from the organic EL element 12 are formed below the anode layer 13. .

The anode layer 13 is made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO). The organic layer 14 consists of an electron carrying layer, a light emitting layer, and a positive hole transport layer. The cathode layer 15 is made of a translucent electrode material, for example, a silver layer (Ag layer) or a gold layer (Au layer). Here, it is preferable that the thickness of the anode layer 13 is 100 nm, the thickness of the organic layer 14 is 200 nm, and the thickness of the cathode layer 15 is 10 nm.

Portions of the organic layer 14 sandwiched above and below the anode layer 13 and the cathode layer 15 serve as light emitting regions. In other words, the organic layer 14 directly below the cathode layer 15 is a light emitting region, and the light emitting region also has the same line shape as the cathode layer 15 in plan view. The light emitting region emits light by applying a positive potential to the anode layer 13 and a negative potential to the cathode layer 15.

Light directed downward from the light emitting region is irradiated to the reflective liquid crystal display 300 through the cathode layer 15. Most of the light upward from the light emitting region is blocked by the light shielding layer 18. Therefore, the direct entry of the light from the light emitting region into the eyes of the observer looking downward from above the lighting unit 200 can be prevented as much as possible, thereby increasing the contrast of the reflective liquid crystal display unit 300.

The anode layer 13 covers the light-shielding layer 18 and the second transparent substrate 20 formed in advance, and forms a transparent conductive material such as ITO or IZO on the second transparent substrate 20, and then, port etching. By using a technique, it can form in a desired area | region. In addition, the organic layer 14 and the cathode layer 15 can be formed in a desired region by the vapor deposition method using a mask.

In addition, since the organic EL element 12 is deteriorated in light emission characteristics due to infiltration of moisture, the desiccant layer 16 is disposed so as to face the second transparent substrate 20 on the surface of the first transparent substrate 10 to prevent this. It is preferable to form Water penetrating into the sealing space through the seal layer 11 is absorbed by the desiccant layer 16.

The desiccant layer 16 includes the first transparent substrate 10 so as not to overlap with the organic EL element 12 in order to avoid blocking external light incident on the organic EL element 12 through the second transparent substrate 20. It is preferable to form at the major end of. However, when the desiccant layer 16 consists of a transparent material, it does not fall in this range. In addition, the antireflection film 21 is preferably adhered to the surface of the second transparent substrate 20 in order to prevent reflection of external light.

In addition, as shown in FIG. 18, in a space surrounded by the first transparent substrate 10, the second transparent substrate 20, and the seal layer 11, the refractive index equal to or approximately the same as the refractive index of the first transparent substrate. You may fill resin 17 which has a. Thereby, the water which permeates through the seal layer 11 can be reliably blocked. In addition, the resin 17 and the seal layer 11 may be formed integrally.

In addition, in the structure of FIG. 17, since an air layer exists between the organic EL element 12 and the 1st transparent substrate 10, the external light which entered the 2nd transparent substrate 20 is an air layer and a 1st transparent substrate ( Reflected at the interface 10, the contrast of the liquid crystal display deteriorates. In contrast, according to the structure of FIG. 18, the external light incident on the second transparent substrate 20 is not reflected at the interface of the first transparent substrate 10, but is incident on the reflective liquid crystal display 300 so that contrast of the liquid crystal display is achieved. Is improved. In the structure of FIG. 18, the desiccant layer 16 of FIG. 17 may be formed.

Next, the structure of the reflective liquid crystal display 300 illuminated by the above-described lighting unit 200 and the coupling relationship with the lighting unit 200 will be described with reference to FIGS. 3 and 19. 3 is a plan view of a part of the pixel region 310 of the liquid crystal display 300, and FIG. 19 is a cross-sectional view taken along the line X-X of FIG. 3.

The switching TFT 31 is formed in each of the plurality of pixels formed on the third transparent substrate 30 (TFT substrate) made of a glass substrate. The TFT 31 is covered with an interlayer insulating film 32, and a reflective pixel electrode 33 made of a reflective material such as aluminum (Al) is formed on the interlayer insulating film 32 in correspondence with each TFT 31. . The reflective pixel electrode 33 is connected to the drain or source of the corresponding TFT 31 through the contact hole CH formed in the interlayer insulating film 32.

A fourth transparent substrate 34 (opposing substrate) made of a glass substrate is disposed to face the third transparent substrate 30 on which the reflective pixel electrode 33 is formed. The common electrode 35 made of ITO is formed on the surface of the fourth transparent substrate 34. On the back surface of the fourth transparent substrate 34, a light scattering layer 36 made of a diffusion adhesive layer and a polarizing plate 37 are laminated in this order. The light scattering layer 36 scatters the light from the illumination unit 200 so as to uniformly irradiate the pixel electrode 33. The liquid crystal layer 40 is sealed between the fourth transparent substrate 34 and the third transparent substrate 30.

According to the above-described configuration, the light emitted from the illumination unit 200 is polarized in a predetermined direction by the polarizing plate 37, and the light scattering layer 36, the fourth transparent substrate 34, and the common electrode 35. It passes through and is introduced into the liquid crystal layer 40, and is reflected by the reflective pixel electrode 33. The light reflected by the reflective pixel electrode 33 is returned to the viewer through the gap between the lines of the cathode layer 15 by reversely returning the same path.

At this time, the transmittance of light is changed for each pixel by an electric field applied between the pixel electrode 33 and the common electrode 35. As a result, the LCD display can be realized by changing the intensity of light reflected by the reflective pixel electrode 33 for each pixel. As mentioned above, the light shielding layer 18 of the illumination part 200 prevents the leakage of the light from the light emission area | region of the organic electroluminescent element 12 as much as possible, and can raise the contrast of a liquid crystal display.

The lighting unit 200 is preferably disposed close to the upper side of the reflective liquid crystal display 300. However, if there is an air layer between the irradiation unit 200 and the reflective liquid crystal display unit 300, when the light emitted from the first transparent substrate 10 of the illumination unit 200 enters the air layer, the first transparent substrate 10 and Reflected at the interface of the air layer, the reflected light is returned to the observer side, and there is a risk of reducing the contrast.

Therefore, the irradiation apparatus 200 and the reflective liquid crystal display 300 are bonded through the resin layer 45 (for example, UV curable resin layer or visible light curable resin layer) having the same refractive index as the first transparent substrate 10. By doing so, it is preferable to reflect the refraction of light.

Next, the arrangement relationship between the illumination unit 200 and the pixels of the reflective LCD 300 will be described. As shown in FIG. 3, in the pixel region 310 of the reflective liquid crystal display 300, three kinds of pixels R, G, and B corresponding to three primary colors of red, green, and blue are in the row direction (x) and the column direction. It is arranged in (y). 3 is a delta array in which pixels R, G, and B are shifted in each row, but the present invention is not limited to this, and may be a stripe array in which pixels R, G, and B are aligned in rows. The lines of the plurality of cathode layers 15 of the lighting unit 200 extend in the row direction x along the boundaries of the pixels R, G, and B. As shown in FIG.

Each pixel has one TFT 31 and one reflective pixel electrode 33. The pitch P1 of the line of the cathode layer 15 of the lighting unit 200 is equal to the pitch P2 of the pixel. In addition, the line of the cathode layer 15 of the illumination part 200 and the line of the light shielding layer 18 are preferably arrange | positioned directly above the space | interval area SR of the reflective pixel electrode 33 which does not contribute to a liquid crystal display. As a result, most of the light reflected by the reflective pixel electrode 33 is not blocked by the light shielding layer 18, but is visually recognized by the viewer through the gaps between the lines of the plurality of light shielding layers 18.

Although the line of the light shielding layer 18 prevents the leakage of the light which generate | occur | produced in the light emission area | region, the light leakage is reduced by making width W1 of the line of the cathode layer 18 larger than the width W2 of the line of the cathode layer 15. The contrast of the liquid crystal display can be further improved.

The pitch P1 of the line of the cathode layer 15 of the illumination unit 200 is smaller than the pitch P2 of the pixel, and the ratio of the pitch P1 of the line of the cathode layer 15 to the pitch P2 of the pixel (= P1 / P2). ) May be 1 / natural number. If the pitch of the lines and the pitch of the pixels are the same, interference fringes or moire fringes are generated in the liquid crystal display, but these phenomena can be prevented by setting in this way.

On the contrary, the pitch P1 of the cathode layer 15 of the lighting unit 200 is larger than the pitch P2 of the pixel, and the ratio P1 / P2 of the pitch P1 of the line to the pitch P2 of the pixel may be a natural number. By such setting, interference fringes and moire fringes can be prevented.

In addition, as shown in FIG. 5, the lines of the plurality of cathode layers 15 of the illumination unit 200 may extend obliquely with respect to the row direction x. By such setting, interference fringes and moire fringes can be prevented.

Next, a display device according to an eighth embodiment of the present invention will be described with reference to FIG. 20. 20 is a cross-sectional view showing the structure of the reflective liquid crystal display unit 300 and the coupling relationship with the illumination unit 200, and corresponds to the cross-sectional view taken along the line X-X of FIG. The feature of the present embodiment is that the first transparent substrate 10 and the fourth transparent substrate 34 of the first embodiment are used as one transparent substrate. That is, as shown in FIG. 20, the 1st transparent substrate 10 is removed and the organic electroluminescent element 12 is formed on the 4th transparent substrate 34 through the polarizing plate 37. As shown in FIG. As a result, not only the thickness of the entire display device can be reduced, but also the cost can be reduced.

Next, a display device according to a ninth embodiment of the present invention will be described with reference to the drawings. 21 is a cross-sectional view of the entire display device. While the anode layer 13 of the organic EL element 12 of the seventh embodiment (see FIG. 17) does not have a line-shaped pattern, in this embodiment, the anode layer of the organic EL element 12 ( 13A) has a line-shaped pattern.

That is, a plurality of anode layers 13A having a line-shaped pattern are formed on the second transparent substrate 20, and the organic layers 14 are formed by covering the anode layers 13A, and the organic layers 14 are formed. On the top, a plurality of cathode layers 15 having the same line pattern are formed. Lines of the plurality of cathode layers 15A and lines of the plurality of anode layers 13A formed under these layers overlap. The other points are the same as in the seventh embodiment.

As in the seventh embodiment (FIG. 17), when the anode layer 13 made of ITO or IZO is formed in a plurality of non-separated patterns on the second transparent substrate 20, the second refractive index difference causes the second electrode to have a second refractive index. External light incident through the transparent substrate 20 is reflected by the anode layer 13, and the contrast of the liquid crystal display is reduced. In contrast, according to the present embodiment, the light passing between the lines of the anode layer 13A is not affected by the reflection by the anode layer 13A. Therefore, the transmittance | permeability of light can raise and the contrast of a liquid crystal display can be improved.

In addition, in the structure of FIG. 21, although the desiccant layer 16 is formed in the surface of the 1st transparent substrate 10 so that the 2nd transparent substrate 20 may be faced, as shown in FIG. 22, a 1st transparent substrate Resin 17 having the same refractive index as that of the first transparent substrate may be filled in the space surrounded by (10) and the second transparent substrate 20 and the seal layer 11.

FIG. 23 is a cross-sectional view showing the structure of the reflective liquid crystal display unit 300 and the coupling relationship with the illumination unit 200, and corresponds to the cross-sectional view taken along the line X-X in FIG. The structure of the reflective liquid crystal display 300 is entirely the same as in the seventh embodiment. As described above, it is preferable that the line of the cathode layer 15 of the lighting unit 200 is disposed directly above the spaced region SR of the reflective pixel electrode 33 which does not contribute to the liquid crystal display, but in this case, the anode layer The line of 13A is also overlapped with the line of the cathode layer 15.

The portion of the organic layer 14 sandwiched by the line of the anode layer 13A and the line of the cathode layer 15 becomes a light emitting region. Although the line of the light shielding layer 18 prevents the leakage of the light which generate | occur | produced in the light emitting area, the width W1 of the line of the light shielding layer 18 is the width W2 of the line of the cathode layer 15, and the line of the line of the anode layer 13A. By making it larger than the width W3, light leakage can be made smaller and the contrast of a liquid crystal display can be improved further.

Next, a display device according to a tenth embodiment of the present invention will be described with reference to FIG. 24. 24 is a cross-sectional view showing the structure of the reflective liquid crystal display unit 300 and the coupling relationship with the illumination unit 200, and corresponds to the cross-sectional view taken along the line X-X of FIG. The feature of the present embodiment is that the first transparent substrate 10 and the fourth transparent substrate 34 of the ninth embodiment are used as one transparent substrate. That is, as shown in FIG. 24, the first transparent substrate 10 is removed, and the organic EL element 12 is formed on the fourth transparent substrate 34. As a result, not only the thickness of the entire display device can be reduced, but also the cost can be reduced.

Next, a display device according to an eleventh embodiment of the present invention will be described with reference to the drawings. 25 is a cross-sectional view of the entire display device. The anode layer 13 and the organic layer 14 of the organic EL element 12 of the seventh embodiment (see FIG. 17) do not have a linear pattern. In this embodiment, the organic EL element 12 The anode layer 13A and the organic layer 14A each have a line pattern.

That is, a plurality of anode layers 13A having a line-shaped pattern are formed on the second transparent substrate 20 via the light shielding layer 18, and a line-shaped pattern is formed on these anode layers 13A. A plurality of organic layers 14A to be stacked are stacked, and a plurality of cathode layers 15 having the same line-like pattern are formed on these organic layers 14A. The lines of the plurality of cathode layers 15A, the lines of the plurality of organic layers 14A formed in these lower layers, and the lines of the plurality of anode layers 13A overlap. The other points are the same as in the seventh embodiment.

As in the seventh embodiment (Fig. 17), when the anode layer 13 made of ITO or IZO is formed in a non-line pattern on the second transparent substrate 20, the second transparent substrate 20 is caused by the difference in refractive index. External light incident through the light or the light generated by the organic EL element 12 is reflected by the anode layer 13, and the contrast of the liquid crystal display is reduced. In addition, the same reflection occurs also in the organic layer 14.

In contrast, according to the present embodiment, the light passing between the lines of the anode layer 13A and the organic layer 14A is not affected by the reflection by these layers. Therefore, the transmittance | permeability of light can raise and the contrast of a liquid crystal display can be improved.

In the structure of FIG. 25, the desiccant layer 16 is formed on the surface of the first transparent substrate 10 to face the second transparent substrate 20, but as shown in FIG. 26, the first transparent substrate Resin 17 having the same refractive index as that of the first transparent substrate may be filled in the space surrounded by (10) and the second transparent substrate 20 and the seal layer 11.

FIG. 27 is a cross-sectional view showing the structure of the reflective liquid crystal display unit 300 and the coupling relationship with the illumination unit 200, and corresponds to the cross-sectional view taken along the line X-X in FIG. The structure of the reflective liquid crystal display 300 is entirely the same as in the seventh embodiment. As described above, the line of the light shielding layer 18 of the irradiator 200 and the line of the cathode layer 15 are preferably disposed directly above the separation region SR of the reflective pixel electrode 33 which does not contribute to the liquid crystal display. However, in this case, the line of the organic layer 14A and the line of the anode layer 13A are also overlapped below the line of the cathode layer 15. The line of the organic layer 14A sandwiched by the line of the anode layer 13A and the line of the cathode layer 15 becomes a light emitting area. Although the line of the light shielding layer 18 prevents the leakage of the light which generate | occur | produced in the light emitting area, the width W1 of the line of the light shielding layer 18 is the width W2 of the line of the cathode layer 15, and the line of the line of the anode layer 13A. By making it larger than the width W3 and the width W4 of the line of the organic layer 14A, light leakage can be made smaller and the contrast of a liquid crystal display can be improved further.

Next, a display device according to a twelfth embodiment of the present invention will be described with reference to FIG. FIG. 28 is a cross-sectional view illustrating the structure of the reflective liquid crystal display 300 and the coupling relationship with the illumination unit 200, and corresponds to the cross-sectional view taken along the line X-X of FIG. 3. The feature of the present embodiment is that the first transparent substrate 10 and the fourth transparent substrate 34 of the eleventh embodiment are combined to form one transparent substrate. That is, as shown in FIG. 28, the first transparent substrate 10 is removed, and the organic EL element 12 is formed on the fourth transparent substrate 34. As a result, not only the thickness of the entire display device can be reduced, but also the cost can be reduced.

In the eleventh and twelfth embodiments, the organic EL element 12 may have a cross-sectional structure shown in FIG. 28. That is, the width of the line of the anode layer 13A is smaller than the light shielding layer 18, the width of the line of the organic layer 14A is smaller than the width of the line of the anode layer 13A, and the width of the line of the cathode layer 15 The width is smaller than the width of the line of the organic layer 14A.

In addition, in the ninth, tenth, eleventh and twelfth embodiments, as shown in FIG. 30, the cathode layer 15 is formed of an opaque light shielding material such as aluminum (Al). (15) Since the light itself functions also as a light shielding layer, the light shielding layer 18 is unnecessary. In this case, the organic EL element 12 is configured by stacking the cathode layer 15, the organic layer 14A, and the anode layer 13A on the second transparent substrate 20 in this order. The width of the organic layer 14A is larger than the width of the anode layer 13A, and the width of the cathode layer 15 is larger than the width of the organic layer 14A.

In addition, in the seventh to twelfth embodiments, the lines of the cathode layer 15 and the light shielding layer 18 can be arranged on the reflective pixel electrodes 33 other than the separation region SR by adjusting the pitch thereof. The pattern of the cathode layer 15 and the light shielding layer 18 may be a mesh-shaped pattern in addition to the line-shaped pattern.

Next, a display device according to a thirteenth embodiment of the present invention will be described with reference to FIG. 32. 32 is a cross-sectional view illustrating a structure of the reflective liquid crystal display 300 and a coupling relationship with the illumination unit 200. The feature of the present embodiment is that the cathode layer 15 having a predetermined pattern is disposed on the second transparent substrate 20, and the organic layer 14 is formed by covering the cathode layer 15. The anode layer 13 made of a translucent material or a transparent material is formed on the organic layer 14. The pattern of the cathode layer 15 is a line shape or a dot shape as shown in FIG. The cathode layer 15 is made of an opaque light shielding material such as aluminum (Al), and the cathode layer 15 itself also functions as a light shielding layer. The rest of the configuration is the same as in the seventh to twelfth embodiments.

Next, a display device according to a fourteenth embodiment of the present invention will be described with reference to FIG. 34. 34 is a cross-sectional view illustrating a structure of the reflective liquid crystal display 300 and a coupling relationship with the illumination unit 200. The present embodiment differs from the thirteenth embodiment in that the transparent electrode layer 50 is formed on the second transparent substrate 20, and the cathode layer 15 having a predetermined pattern is formed on the transparent electrode layer 50. It is arranged. Moreover, the insulator layer 51 is arrange | positioned between the transparent electrode layer 50 and the cathode layer 15, and the electrical between the transparent electrode layer 50 and the cathode layer 15 is not provided in the place where the insulator layer 51 is not arrange | positioned. Contact is made. The pattern of the cathode layer 15 is a line shape or a dot shape similarly to the thirteenth embodiment.

The display device of the present invention front-sides an organic electroluminescent element of a bottom emission type (type in which light emitted from an organic electroluminescent element is emitted to the substrate side on which the organic electroluminescent element is formed). As a light, it is possible to realize a bright and high contrast liquid crystal display in both bright and dark environments.

Claims (17)

An illumination unit disposed on the reflective liquid crystal display unit, The illumination unit includes: a first substrate having its rear surface bonded to the reflective liquid crystal display unit; a second substrate bonded to the first substrate via a seal layer; An organic electroluminescent element disposed on the surface of the first substrate and having an anode layer made of a transparent electrode material, an organic layer formed by covering the anode layer, and a cathode layer formed with a predetermined pattern on the organic layer. Equipped, The reflective liquid crystal display may include: a third substrate having a plurality of pixels, and having reflective pixel electrodes receiving light generated from the organic electroluminescent element in each pixel; A fourth substrate disposed on the third substrate and having a common electrode formed on a surface thereof, and a liquid crystal layer encapsulated between the third substrate and the fourth substrate Display device comprising a. The method of claim 1, And the first substrate and the fourth substrate are combined to constitute one substrate. The method according to claim 1 or 2, The cathode layer has a line-shaped pattern, the pitch of the line is the same as the pitch of the pixel. The method according to claim 1 or 2, The cathode layer has a line-shaped pattern, and the pitch of the line is smaller than the pitch of the pixel, and the ratio of the pitch of the line of the cathode layer to the pitch of the pixel is 1 / natural number. The method according to claim 1 or 2, The cathode layer has a line-shaped pattern, and the pitch of the line is larger than the pitch of the pixel, and the ratio of the pitch of the line of the cathode layer to the pitch of the pixel is a natural number. The method according to claim 1 or 2, And a desiccant layer disposed on the surface of the second substrate so as to face the surface of the first substrate. The method according to claim 1 or 2, And a resin or a desiccant having a refractive index substantially equal to the refractive index of the second substrate is filled between the first and second substrates. An illumination unit disposed on the reflective liquid crystal display unit, The said illumination part, The 1st board | substrate with which the back surface was joined by the said reflection liquid crystal display part, The 2nd board | substrate bonded through the seal layer, An anode layer disposed on the surface of the second substrate and formed by covering the anode layer; An organic electroluminescent element formed on the organic layer with a predetermined pattern and having a cathode layer made of a translucent electrode material, and having a pattern corresponding to the cathode layer below the anode layer; And a light shielding layer for shielding light generated from the luminescence element, The reflective liquid crystal display may include: a third substrate having a plurality of pixels, and having reflective pixel electrodes receiving light generated from the organic electroluminescent element in each pixel; A fourth substrate disposed on the third substrate and having a common electrode formed on a surface thereof, and a liquid crystal layer encapsulated between the third substrate and the fourth substrate Display device comprising a. The method of claim 8, And the first substrate and the fourth substrate are combined to constitute one substrate. The method of claim 8, And a desiccant layer disposed on the surface of the first substrate so as to face the surface of the second substrate. The method of claim 8, And a resin or a desiccant having a refractive index substantially equal to the refractive index of the second substrate is filled between the first and second substrates. An illumination unit disposed on the reflective liquid crystal display unit, The said illumination part, The 1st board | substrate with which the back surface was joined by the said reflection liquid crystal display part, The 2nd board | substrate bonded through the seal layer, An organic electroluminescence having a cathode layer having a predetermined pattern, an organic layer formed by covering the cathode layer, and an anode layer made of a translucent material or a transparent material via the organic layer; With a device, The reflective liquid crystal display may include: a third substrate having a plurality of pixels, and having reflective pixel electrodes receiving light generated from the organic electroluminescent element in each pixel; And a fourth substrate disposed on the third substrate and having a common electrode formed on the surface thereof, and a liquid crystal layer enclosed between the third substrate and the fourth substrate. The method of claim 12, A transparent electrode layer is formed on the second substrate, and the display device has a cathode layer having the predetermined pattern on the transparent electrode layer. The method of claim 12, An insulator layer is disposed between the transparent electrode layer and the cathode layer, and the display device is in electrical contact with the transparent electrode layer and the cathode layer at a location where the insulator layer is not disposed. The method of claim 12, And the first substrate and the fourth substrate are combined to constitute one substrate. The method of claim 12, And a desiccant layer disposed on the surface of the first substrate so as to face the surface of the second substrate. The method of claim 12, And a resin or a desiccant having a refractive index substantially equal to the refractive index of the second substrate is filled between the first and second substrates.

Images