Patent Publication Number: US-11659739-B2

Title: Display unit and electronic apparatus

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     The present application is a Continuation of application Ser. No. 16/294,418, filed Mar. 6, 2019, which is a Continuation of application Ser. No. 15/981,494, filed May 16, 2018, now U.S. Pat. No. 10,263,061, issued Apr. 16, 2019, which is a Continuation of application Ser. No. 15/408,627, filed Jan. 18, 2017, now U.S. Pat. No. 9,991,325, issued Jun. 5, 2018, which is a Continuation of application Ser. No. 14/541,774, filed Nov. 14, 2014, now U.S. Pat. No. 9,577,018, issued Feb. 21, 2017, and claims the benefit of Japanese Priority Patent Application JP 2013-272926 filed Dec. 27, 2013, the entire contents of which are incorporated herein by reference. 
    
    
     BACKGROUND 
     The present disclosure relates to a display unit emitting light with use of organic electroluminescence (EL) phenomenon, and to an electronic apparatus provided with the display unit. 
     Along with increasing pace of development of information and communication industry, a high-performance display element is demanded. In the circumstances, an organic EL element attracting attention as a next generation display element has advantages of high response speed in addition to wide viewing angle and excellent contrast, as a self-light-emitting display element. 
     In a display unit provided with the organic EL elements (the light emitting elements), a plurality of pixels are arranged in a display region, and for example, the organic EL element emitting red light (a red pixel R), green light (a green pixel G), or blue light (a blue pixel B) is provided in each of the pixels. In addition, a color element (a color filter) corresponding to each color pixel is provided on a counter surface of each organic EL element, which improves color purity of light extracted from the display unit. 
     Typically, a black matrix is provided between color elements in order to prevent color mixture from adjacent color pixels. However, light emitted from a light emitting element in an oblique direction (obliquely-emitted light) passes through the black matrix and enters the color pixels adjacently provided (adjacent color pixels), and thus causes degradation of color purity. Therefore, for example, in Japanese Unexamined Patent Application Publication Nos. 2005-294057 and 2005-293946, display units in which a black matrix is formed to have a thickness larger than that of a color filter to shield obliquely-entering light are disclosed. Moreover, for example, in Japanese Unexamined Patent Application Publication Nos. 2007-220395 and 2009-104969, display units in which a black matrix is formed on a color filter to decrease a distance between the black matrix and a light emission surface, and thus color mixture is suppressed are disclosed. On the other hand in Japanese Unexamined Patent Application Publication No. 2006-243171, a liquid crystal display unit in which a light shielding resin film (a black matrix) is formed on a thin film covering a colorant (corresponding to a color filter) to suppress color mixture is disclosed. 
     SUMMARY 
     However, it is technically difficult to form a black matrix with larger thickness than that of the color filter. Moreover, even if the black matrix is formed on the color filter, a distance between a light emission surface and the black matrix is decreased only by a film thickness of the color filter, and therefore, sufficient color mixture prevention effect is not obtained. Further, since the color filter is varied in film thickness depending on color pixel, which disadvantageously causes variation in chromaticity viewing angle for each color. 
     It is desirable to provide a display unit and an electronic apparatus that are capable of preventing color mixture in adjacent color pixels, and improving color reproducibility and chromaticity viewing angle. 
     According to an embodiment of the technology, there is provided a display unit including: a drive substrate having a plurality of pixels with a partition therebetween; and a first light shielding film provided on the partition. 
     According to an embodiment of the technology, there is provided an electronic apparatus provided with a display unit. The display unit includes: a drive circuit having a plurality of pixels with a partition therebetween; and a first light shielding film provided on the partition. 
     In the display unit and the electronic apparatus according to the respective embodiments of the technology, the first shielding film is provided on the partition that is provided between the pixels, which suppresses entering, to the adjacent color pixels (specifically, the color pixels adjacently provided), of emitted light (obliquely-emitted light) that is emitted at a large emission angle and thus may enter the adjacent pixels. 
     In the display unit and the electronic apparatus according to the respective embodiments of the technology, the first light shielding film is provided on the partition provided between the pixels. Therefore, it is possible to shield the obliquely-emitted light to prevent occurrence of color mixture in the adjacent color pixels. Consequently, it is possible to provide the display unit and the electronic apparatus that have high chromaticity viewing angle and high color reproducibility. Note that the effects described here are not necessarily limited, and effects described in the present disclosure may be obtained. 
     It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the specification, serve to explain the principles of the technology. 
         FIG.  1    is a sectional diagram illustrating a structure of a display unit according to a first embodiment of the disclosure. 
         FIG.  2    is a plan view illustrating a shape of a light shielding film in the display unit illustrated in  FIG.  1   . 
         FIG.  3    is a schematic diagram explaining an effect of the display unit illustrated in  FIG.  1   . 
         FIG.  4    is a diagram illustrating an entire configuration of the display unit illustrated in  FIG.  1   . 
         FIG.  5    is a circuit diagram illustrating an example of a pixel drive circuit illustrated in  FIG.  4   . 
         FIG.  6    is a sectional diagram illustrating a structure of a display unit according to a second embodiment of the disclosure. 
         FIG.  7    is a schematic diagram explaining an effect of the display unit illustrated in  FIG.  6   . 
         FIG.  8    is a sectional diagram illustrating a structure of a display unit according to a modification of the first embodiment of the disclosure. 
         FIG.  9    is a sectional diagram illustrating a structure of a display unit according to a modification of the second embodiment of the disclosure. 
         FIG.  10    is a sectional diagram illustrating a structure of a display unit according to a third embodiment of the disclosure. 
         FIG.  11 A  is a perspective view illustrating an example of an appearance of an application example 1 of the display unit according to any of the above-described embodiments and the like. 
         FIG.  11 B  is a perspective view illustrating another example of the appearance of the application example 1 illustrated in  FIG.  11 A . 
         FIG.  12    is a perspective view illustrating an appearance of an application example 2. 
         FIG.  13 A  is a front view, a left side view, a right side view, a top view, and a bottom view of an application example 3 in a closed state. 
         FIG.  13 B  is a front view and a side view of the application example 3 illustrated in  FIG.  13 A  in an open state. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, some embodiments, modifications, and application examples of the disclosure will be described in detail with reference to drawings. Note that description will be given in the following order.
     1. First embodiment (an example in which a light shielding film is formed on a top surface of a partition)
       1-1. Basic structure   1-2. Entire configuration of display unit   1-3. Manufacturing method   1-4. Function and effects   
       2. Second embodiment (an example in which a second light shielding film is added between a light shielding film on a partition and a BM)   3. Modifications (an example in which a light shielding film is formed on a top surface and an inclined surface of a partition)   4. Third embodiment (an example in which a reflective light shielding film is formed on a partition)   5. Application examples (examples of an electronic apparatus)   

     1. First Embodiment 
       FIG.  1    illustrates an example of a sectional structure of a display unit (a display unit  1 ) according to a first embodiment of the disclosure. The display unit  1  may be used as, for example, a television receiver, and as illustrated in  FIG.  4   , a display region  110 A and a peripheral region  110 B that is provided on the periphery thereof are provided on a drive substrate  11 . The display unit  1  includes a plurality of pixels  2  (for example, a red pixel  2 R, a green pixel  2 G, and a blue pixel  2 B) that are arranged in a matrix in the display region  110 A. In each of the pixels  2 R,  2 G, and  2 B, a light emitting element  10  (a red light emitting element  10 R, a green light emitting element  10 G, and a blue light emitting element  10 B, respectively) emitting corresponding single light (red light LR, green light LG, and blue light LB, respectively) is provided. The display unit  1  is a display unit of a top light emission type (so-called top emission type) that allows light emitted from the light emitting element  10  to be extracted from a top surface (a surface on a side opposite to the drive substrate  11 ) side. The peripheral region  110 B is provided with a signal line drive circuit  120  and a scan line drive circuit  130  that are drivers for picture display. 
     1-1. Basic Structure 
     As illustrated in  FIG.  1   , in the display unit  1 , each of the pixels  2 R,  2 G, and  2 B is segmented by a partition  13  provided on the drive substrate  11 . Color filters (CF)  22 R,  22 G, and  22 B are provided on positions corresponding to the respective pixels  2 R,  2 G, and  2 B (on the light emitting elements  10 R,  10 G, and  10 B) on a counter surface of a counter substrate  20  that is provided oppositely to the drive substrate  11 . A black matrix (BM)  21  that prevents color mixture from adjacent color pixels is provided between the CFs  22 R,  22 G, and  22 B. In the first embodiment, the display unit  1  has a structure in which a light shielding film  14  (a first light shielding film) is provided on a top surface (specifically, a position facing the BM  21 ) of the partition  13 . 
     Each of the light emitting elements  10 R,  10 G, and  10 B has a pixel electrode  12  as an anode, an organic layer  15  including a light emitting layer  15 B, and a counter electrode  16  as a cathode that are stacked in order from the drive substrate  11  side provided with a drive transistor Tr 1  and the like of the pixel drive circuit  140  (see  FIG.  4    and  FIG.  5   ). The partition  13  is provided between the light emitting elements  10 R,  10 G, and  10 B, and the above-described light shielding film  14  is provided on the partition  13  and between the partition  13  and the organic layer  15  configuring the light emitting element  10 . 
     Such light emitting elements  10 R,  10 G, and  10 B are covered with a protection film  17  and a planarizing film  18 , and further, the counter substrate  20  is bonded to the entire planarizing film  18  with an adhesive layer (not illustrated) in between. Note that the counter substrate  20  has the BM  21  and the CF  22  on the counter surface to the drive substrate  11 , and an overcoat (OC)  23  is provided on the CF  22 . 
     The pixel electrode  12  also has a function as a reflection layer, and may desirably have a reflectance as high as possible in order to enhance light emission efficiency. In particular, when the pixel electrode  12  is used as an anode, the pixel electrode  12  may be desirably formed of a material with higher hole injection property. For example, such a pixel electrode  12  may have a thickness in a stacked-layer direction (in the X-axis direction) (hereinafter, simply referred to as a thickness) of about 100 nm or more and about 1000 nm or less, and may be formed of a simple substance of a metal element of chromium (Cr), gold (Au), platinum (Pt), nickel (Ni), copper (Cu), tungsten (W), silver (Ag), and the like or an alloy containing any of these metal elements. A transparent conductive film formed of an indium tin oxide (ITO) or the like may be provided on a surface of the pixel electrode  12 . Incidentally, as with an aluminum (Al) alloy, a material that has an issue of a hole injection barrier due to presence of an oxide film on the surface thereof and small work function while having high reflectance may be used as the pixel electrode  12  by providing an appropriate hole injection layer. 
     The partition  13  segments the pixels  2 R,  2 G, and  2 B as described above, and electrically separates the light emitting elements  10 R,  10 G, and  10 B from one another. An opening section  13 A that is a light emitting region for each of the pixels  2 R,  2 G, and  2 B is provided in the partition  13 . Although detail will be described later, an organic layer  15  including a light emitting layer  15 B (a red light emitting layer  15 BR, a green light emitting layer  15 BG, or a blue light emitting layer  15 BB) configuring the corresponding light emitting element  10 R,  10 G, or  10 B is provided in the opening section  13 A. Examples of the material of the partition  13  may include, for example, an organic material such as polyimide, a novolak resin, and an acrylic resin. However, the material of the partition  13  is not limited thereto, and for example, the organic material and an inorganic material may be combined and used. Examples of the inorganic material may include SiO 2 , SiO, SiC, and SiN. For example, although the partition  13  may be formed as a single layer film of the above-described organic material, may be formed to have a stacked-layer structure of an organic film and an inorganic film when the organic material and the inorganic material are combined. Incidentally, the organic layer  15  and the counter electrode  16  are provided also on the partition  13 ; however, light is emitted from only the light emitting region. 
     In the first embodiment, the partition  13  includes the top surface that has a flat plane parallel to the drive substrate  11 , and includes a side surface (an inclined surface) that is inclined in a forward tapered shape. The light shielding film  14  is provided on the top surface of the partition  13 . 
     The light shielding film  14  is provided on the top surface of the partition  13  as described above, and as illustrated in  FIG.  2   , has a lattice shape segmenting each of the pixels  2 R,  2 G, and  2 B as viewed from the flat plane. As illustrated in  FIG.  3   , the light shielding film  14  prevents obliquely-emitted light (for example, Lm 2 ) that may cause color mixture in adjacent color pixels, out of light emitted from the light emitting layer  15 B, from entering the adjacent color pixels. A width (D 2 ) of the light shielding film  14  may be preferably larger than a width (D 1 ) of the BM  21  described later. In other words, the light shielding film  14  may be preferably formed so that an end surface thereof is located on a pixel side rather than an end surface of the opening of the BM  21 . As a result, it is possible to obtain high light shielding effect with respect to the obliquely-emitted light that may enter the adjacent color pixels. The thickness of the light shielding film  14  may be, for example, about 0.1 μm or more and about 1 μm or less. A light absorbing material may be preferably used as the material of the light shielding film  14 , and for example, a material of the same kind as that of the BM  21  may be used for the light shielding film  14 . Specifically, a carbon (C), chromium oxide (Cr 2 O 3 ), and an alloy of samarium (Sm) and silver (Ag), or an organic material may be used. The light shielding film  14  may be configured as a single layer film or a stacked-layer film formed of any of these materials. Examples of a specific stacked-layer film may include a metal stacked-layer film such as vanadium oxide (VO)/Ag or a stacked-layer film of an organic material and a metal material such as Al/mixture of copper phthalocyanine and Al (CuPc:Al)/Al, Al/DCJTB/Al, and Al/DCJTB:CuPc:Al/Al. 
     Note that forming the light shielding film  14  by a light absorbing material makes it possible to reduce external light reflection and to improve contrast. Moreover, forming the light shielding film  14  by a conductive material and setting the light shielding film  14  and the cathode electrode (here, the counter electrode  16 ) to the same potential (for example, connecting to GND) makes it possible to prevent leakage of a current into the adjacent color pixels. As a result it is possible to reduce color mixture caused by unintentional light emission of the adjacent color pixels due to the leakage current. 
     For example, the organic layer  15  may have a structure in which a hole supply layer  15 A, the light emitting layer  15 B, and an electron supply layer  15 C are stacked in order from the pixel electrode  12  side. Among them, layers other than the light emitting layer  15 B may be provided as necessary. The organic layer  15  may be different in structure depending on the emitted color from the light emitting elements  10 R,  10 G, and  10 B. For example, the hole supply layer  15 A may have a structure in which a layer having a hole injection property (a hole injection layer) and a layer having a hole transport property (a hole transport layer) are stacked in this order from the pixel electrode  12  side. The hole injection layer is a buffer layer that enhances hole injection efficiency to the light emitting layer  15 B and prevents leakage. The hole transport layer enhances hole transport efficiency to the light emitting layer  15 B. In the light emitting layer  15 B, electrons and holes are recombined by application of an electric field, and therefore light is emitted. For example, the electron supply layer  15 C may have a structure in which a layer having an electron transport property (an electron transport layer) and a layer having an electron injection property (an electron injection layer) are stacked in this order from the light emitting layer  15 B side. The electron transport layer enhances electron transport efficiency to the light emitting layer  15 B. The electron injection layer enhances electron injection efficiency. 
     In the hole supply layer  15 A, the hole injection layer may have a thickness of, for example, about 5 nm or more and about 300 nm or less, and may be formed of, for example, a hexa-aza triphenylene derivative. The hole transport layer may have a thickness of, for example, about 5 nm or more and about 300 nm or less, and may be formed of bis RN-naphthyl)-N-phenyllbenzidine (α-NPD). The light emitting layer  15 B may have a thickness of, for example, about 10 nm or more and about 100 nm or less. For example, the red light emitting layer  15 BR may be configured of a mixture obtained by mixing 40 vol % of 2,6-bis[4-[N-(4-methoxyphenyl)-N-phenyl]aminostyryl]naphthalene-1,5-dicarbonitrile (BSN-BCN) to 8-quinolinol aluminum complex (Alq3). In the electron supply layer  15 C, the electron transport layer may have a thickness of, for example, about 5 nm or more and about 300 nm or less, and may be formed of Alq3. The electron injection layer may have a thickness of, for example, about 0.3 nm, and may be formed of LiF, Li 2 O, or the like. 
     The counter electrode  16  may have a thickness of, for example, about 10 nm, and may be formed of an alloy of Al, magnesium (Mg), calcium (Ca), or Ag. Among them, an alloy of Mg and Ag (Mg—Ag alloy) may be preferable because the alloy has conductivity and small absorption in a thin film state. A ratio of Mg and Ag in the Mg—Ag alloy is not particularly limited; however, the ratio of Mg and Ag may be preferably within the range of Mg:Ag=20:1 to 1:1 in film thickness ratio. Moreover, the material of the counter electrode  16  may be an alloy of Al and lithium (Li) (Al—Li alloy). 
     Moreover, the counter electrode  16  may also have a function as a semipermeable reflective layer. When the counter electrode  16  has the function as the semipermeable reflective layer, the light emitting element  10  has a resonator structure, and resonates light that is emitted from the light emitting layer  15 B, between the pixel electrode  12  and the counter electrode  16  with use of the resonator structure. 
     The protection layer  17  is formed on the counter electrode  16 , and may be formed of, for example, an inorganic material such as silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiN x O y ), titanium oxide (TiO x ), and aluminum oxide (Al x O y ). 
     The planarizing film  18  is formed on the protection film  17  substantially uniformly. The planarizing film  18  may function also as the above-described adhesive layer, and may be formed of, for example, an epoxy resin or an acrylic resin. 
     The counter substrate  20  seals the light emitting elements  10 R,  10 G, and  10 B, and is formed of a material such as glass having permeability to light emitted from the light emitting elements  10 R,  10 G, and  10 B. For example, the BM  21  and the CF  22  may be provided on a surface (an opposed surface) on the drive substrate  11  side of the counter substrate  20 . The BM  21  and the CF  22  extract light LR, LG, and LB that are respectively emitted from the red light emitting element  10 R, the green light emitting element  10 G, and the blue light emitting element  10 B, and absorb external light that is reflected by the light emitting elements  10 R,  10 G, and  10 B and the wirings therebetween to improve contrast. 
     The BM  21  is provided at a position corresponding to between the pixels  2 R,  2 G, and  2 B (specifically, the partition  13 ) between the counter substrate  20  and the CF  22 . For example, the BM  21  may be formed of a black resin film that is mixed with a black colorant and has optical density of 1 or more, or a thin film filter using thin film interference. Among them, the BM  21  may be preferably formed of the black resin film because it is low in cost and is formed easily. For example, the thin film filter may be configured by stacking one or more thin films formed of a metal, a metal nitride, or a metal oxide, and may attenuate light with use of the thin film interference. Specific examples of the thin film filter may include a filter configured by alternately stacking Cr 2 O 3  and one of C and Cr. 
     The CF  22  may include, for example, a red filter  22 R, a green filter  22 G, and a blue filter  22 B that are arranged corresponding to the light emitting elements  10 R,  10 G, and  10 B, respectively. The red filter  22 R, the green filter  22 G, and the blue filter  22 B each may be formed in, for example, a rectangular shape and are arranged without clearance. The red filter  22 R, the green filter  22 G, and the blue filter  22 B are each formed of a resin mixed with a pigment, and are adjusted by selection of the pigment so that light transmittance in a target wavelength range of red, green or blue becomes high and light transmittance in other wavelength ranges becomes low. 
     The overcoat (OC) film  23  formed of a transparent insulating material or a transparent conductive material is provided on the BM  21  and the CF  22 . Examples of the insulating material may include, for example, an organic material such as polyimide and acryl, and an inorganic material such as silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiN x O y ), titanium oxide (TiO x ), and aluminum oxide (Al x O y ). Examples of the conductive material may include, for example, ITO and IZO. Note that the OC  23  is not necessarily formed and may be omitted. 
     1-2. Entire Configuration of Display Unit 
       FIG.  4    illustrates an entire configuration of the display unit  1 . As described above, the display unit  1  has the signal line drive circuit  120  and the scan line drive circuit  130  that are drivers for picture display, in the peripheral region  110 B on the periphery of the display region  110 A. The pixel drive circuit  140  is provided in the display region  110 A. 
       FIG.  5    illustrates an example of the pixel drive circuit  140 . The pixel drive circuit  140  is an active drive circuit formed in a lower layer of the pixel electrode  12 . Specifically, the pixel drive circuit  140  has a drive transistor Tr 1 , a write transistor Tr 2 , a capacitor (a retention capacitance) Cs between the transistors Tr 1  and Tr 2 , and the light emitting element  10 R (or  10 G or  10 B) that is connected in series to the drive transistor Tr 1  between a first power line (Vcc) and a second power line (GND). The drive transistor Tr 1  and the write transistor Tr 2  are each formed of a typical thin film transistor, and the structure thereof may be, for example, an inversely staggered structure (so-called bottom gate type) or a staggered structure (a top gate type) without specific limitation. 
     In the pixel drive circuit  140 , a plurality of signal lines  120 A are provided in a column direction, and a plurality of scan lines  130 A are provided in a row direction. An intersection between each of the signal lines  120 A and each of the scan lines  130 A corresponds to any one of the light emitting elements  10 R,  10 G, and  10 B (the pixels  2 R,  2 G, and  2 B). Each of the signal lines  120 A is connected to the signal line drive circuit  120 , and an image signal is supplied from the signal line drive circuit  120  to a source electrode of the write transistor Tr 2  through the signal line  120 A. Each of the scan lines  130 A is connected to the scan line drive circuit  130 , and a scan signal is sequentially supplied from the scan line drive circuit  130  to a gate electrode of the write transistor Tr 2  through the scan line  130 A. 
     1-3. Manufacturing Method 
     The display unit  1  according to the first embodiment is manufactured with use of the following method. 
     First, the pixel drive circuit  140  including the pixel electrode  12  and the drive transistor Tr 1  is formed on the drive substrate  11  made of the above-described material, and then a photosensitive resin is applied to the entire surface of the drive substrate  11  to form a planarizing insulating film (not illustrated). Next, the pixel electrode  12  made of the above-described material may be formed by, for example, sputtering, and the pixel electrode  12  is selectively removed by wet etching to separate the pixel electrode  12  for each of the light emitting elements  10 R,  10 G, and  10 B. 
     Subsequently, for example, a photosensitive resin to be the partition  13  may be applied on the entire surface of the drive circuit  11 , and the opening section  13 A corresponding to the light emitting region may be formed by, for example, photolithography, followed by firing to form the partition  13 . Next, the hole supply layer  15 A, the light emitting layer  15 B, and the electron supply layer  15 C of the organic layer  15  made of the above-described material with the above-described thickness may be formed by, for example, an evaporation method. Then, the counter electrode  16  made of the above-described material with the above-described thickness may be formed by, for example, the evaporation method. As a result, the light emitting elements  10 R,  10 G, and  10 B illustrated in  FIG.  1    are formed. 
     Subsequently, the protection film  17  made of the above-described material may be formed by, for example, a CVD method or sputtering on the light emitting elements  10 R,  10 G, and  10 B. Then, the planarizing film  18  is formed on the protection film  17 , and the counter substrate  20  that is provided with the CF  22  and the BM  21  covered with the OC  23  is bonded to the drive substrate  11  with the planarizing film  18  (or an adhesive layer) in between. In this way, the display unit  1  illustrated in  FIG.  1    and  FIG.  4    is completed. 
     In the display unit  1 , the scan signal is supplied from the scan line drive circuit  13  to each of the pixels  2 R,  2 G, and  2 B through the gate electrode of the write transistor Tr 2 , and the image signal is retained in the retention capacitance Cs from the signal line drive circuit  120  through the write transistor Tr 2 . In other words, the drive transistor Tr 1  is controlled to be turned on or off in response to the signal retained by the retention capacitance Cs, and thus a drive current Id is injected into the light emitting elements  10 R,  10 G, and  10 B, which causes recombination of the holes and the electrons to emit light. For example, the light LR, LG, and LB are reflected multiply between the pixel electrode  12  and the counter electrode  16 , or the reflected light by the pixel electrode  12  and the light emitted from the light emitting layer  15 B reinforce each other by interference, and resultant light is extracted after passing through the counter electrode  16 , the color filter  23 , and the counter substrate  20 . 
     1-4. Function and Effects 
     In the typical display unit, obliquely-entering light from adjacent color pixels is shielded by a black matrix (for example, the BM  21  in the display unit  1 ) provided on the counter substrate side, and occurrence of color mixture is suppressed. However, it is difficult to sufficiently shield the obliquely-entering light from the adjacent color pixels depending on a distance (specifically, the thicknesses of the respective layers configuring the light emitting element, the planarizing film, and the like) between a light emitting part (specifically, the light emitting layer) and an extraction part of the emitted light (for example, the opening of the black matrix), which disadvantageously causes degradation in chromaticity viewing angle due to color mixture. 
     As a method of improving light shielding effect by the black matrix, a method in which the width in the flat plane direction of the black matrix is increased, or a method in which the film thickness of the black matrix is increased as described above are considered. However, there are disadvantages that luminance is decreased with decrease of an opening ratio and manufacturing is difficult in such methods. 
     In contrast, in the display unit  1  of the first embodiment, the light shielding film  14  is provided on the partition  13  that segments each of the pixels  2 R,  2 G, and  2 B. As a result, it is possible to further reduce entering of the obliquely-emitted light to the adjacent color pixels. Specifically, as illustrated in  FIG.  3   , out of the light Lm that is emitted at a large emission angle to the X-axis direction and thus may enter the adjacent color pixels, for example, obliquely-emitted light Lm 1  emitted at the center part of the light emitting layer  15 BG may be shielded by the BM  21  provided on the counter substrate  20 . On the other hand, for example, obliquely-emitted light Lm 2  emitted on an outer side than the center part of the light emitting layer  15 BG may not be shielded by the BM  21  provided on the counter substrate  20  side. However, as with the first embodiment, by forming the light shielding film  14  on the partition  13 , the obliquely-emitted light Lm 2  is shielded by the light shielding film  14 . 
     Therefore, in the display unit  1  according to the first embodiment, since the light shielding film  14  is provided on the partition  13  segmenting each of the pixels  2 R,  2 G, and  2 B, it is possible to reduce occurrence of color mixture by the obliquely-emitted light. Accordingly, it is possible to provide the display unit having high chromaticity viewing angle characteristics. 
     Moreover, in the first embodiment, the light shielding film  14  is formed of a light absorbing material, which makes it possible to reduce external light reflection, and thus contrast is allowed to be improved. Alternatively, the light shielding film  14  is formed using a conductive material, which makes it possible to prevent leakage of the current into the adjacent color pixels. As a result, light emission of the adjacent color pixels due to electrical leakage is suppressed. Therefore, it is possible to provide the display unit with higher color reproducibility. 
     Next, a second embodiment and modifications will be described. Hereinafter, like numerals are used to designate substantially like components of the above-described first embodiment, and the description thereof is appropriately omitted. 
     2. Second Embodiment 
       FIG.  6    illustrates a sectional structure of a display unit  3  according to the second embodiment of the disclosure. Similarly to the above-described first embodiment, the display unit  3  may be used as, for example, a television receiver, and may be a top emission type display unit allowing emitted light to be extracted from a top surface side. The display unit  3  according to the second embodiment is different from the above-described first embodiment in that a light shielding film  24  (a second light shielding film) is formed between the BM  21  provided on the counter substrate  20  side and the light shielding film  14  provided on the partition  13  that is provided in the above-described first embodiment. 
     The light shielding film  24  is provided in a region where the light shielding film  14  provided on the partition  13  as described above faces the BM  21  provided on the counter substrate  20  side. Specifically, for example, the light shielding film  24  may be provided on a surface on the drive substrate  11  side of the OC  23 , and may have a lattice shape to segment each of the pixels  2 R,  2 G, and  2 B, similarly to the light shielding film  14  and the BM  21 . When the light shielding film  24  is formed to have a width (D 3 ) larger than the width (D 1 ) of the BM  21 , the light shielding film  24  is allowed to effectively shield the obliquely-emitted light that may enter the adjacent color pixels (see  FIG.  7   ). Note that, to maintain a viewing angle at which vignetting is caused by the BM  21 , the width (D 3 ) of the light shielding film  24  may be preferably, for example, (d 2 ×D 4 +d 1 ×D 1 )/(d 1 +d 2 ) or lower. A thickness of the light shielding film  24  may be preferably, for example, about 0.1 μm or more and about 1 μm or lower. The material of the same kind as that of the light shielding film  14  and the BM  21  may be used as the material of the light shielding film  24 . 
     As described above, in the second embodiment, the light shielding film  24  is provided in the region where the light shielding film  14  on the partition  13  faces the BM  21  on the counter substrate  20 . Therefore, as illustrated in  FIG.  7   , out of the obliquely-emitted light Lm emitted from the light emitting layer  15 B, light that is not shielded by the light shielding film  14  and the BM  21  (for example, Lm 2  and Lm 1 ) is allowed to be shielded. Therefore, it is possible to reduce occurrence of color mixture caused by emitted light (obliquely-emitted light) that is emitted at a large emission angle and thus may enter the adjacent color pixels, and therefore to provide the display unit with higher chromaticity viewing angle characteristics. 
     3. Modifications 
       FIG.  8    illustrates a sectional structure of a display unit  4  according to a modification of the above-described first embodiment. The display unit  4  according to the present modification is different from the above-described first embodiment in that a light shielding film  34  provided on the partition  13  is formed in a region wider than that of the light shielding film  14  of the above-described first embodiment, more specifically, the light shielding film  34  is formed on the entire top surface and the entire inclined surface of the partition  13 . 
     As described above, in the display unit  4  according to the present modification, the light shielding film  34  may be provided on the entire top surface and the entire inclined surface of the partition  13 . As a result, it is possible to obtain effect that external light reflection is further suppressed, in addition to the effects of the above-described embodiment. 
     Moreover, light emitted in the vicinity of an end surface of the light emitting layer  15 B passes through the partition  13  and then enters the adjacent color pixels, and is reflected or scattered by the side surface (the inclined surface) of the partition  13  that segments the adjacent pixel, to generate color mixture. In the present modification, since the inclined surface of the partition  13  is also covered with the light shielding film  34 , it is possible to prevent the light emitted in the vicinity of the end surface from entering (being leaked into) the adjacent color pixels. Accordingly, it is possible to further reduce occurrence of color mixture. Covering the entire partition  13  with the light shielding film  34  makes it possible to reduce intrusion of moisture and gas such as oxygen from the partition  13  to the organic layer  15 . As a result, it is possible to improve reliability of the light emitting element  10  and the display unit provided with the light emitting element  10 . 
     Incidentally, the present modification may be applied to the above-described second embodiment as with a display unit  5  illustrated in  FIG.  9   . 
     4. Third Embodiment 
       FIG.  10    illustrates a sectional structure of a display unit  6  according to a third embodiment of the disclosure. The display unit  6  is a top emission type display unit that allows emitted light to be extracted from a top surface side, similar to the above-described first embodiment and the like. The display unit  6  of the third embodiment is different from the above-described first embodiment in that a light shielding film  44  having light reflectivity is provided on the partition  13  and the black matrix typically provided on the counter substrate  20  side is omitted. With this configuration, the display unit  6  is allowed to be used as a so-called mirror display that is usable as a mirror in non-display state. 
     The light shielding film  44  is provided on the partition  13  as described above. Specifically, the light shielding film  44  is provided on the top surface and the inclined surface of the partition  13 . The light shielding film  44  may be formed of a material having light reflectivity, and for example, a simple substance of a metal element such as Al, Cr, gold (Au), platinum (Pt), nickel (Ni), Cu, tungsten (W), and Ag, or an alloy containing these metal elements may be used for the light shielding film  44 . It is sufficient for the light shielding film  44  to have a thickness allowing the light entered from the outside (external light) to be reflected, and for example, the thickness of the light shielding film  44  may be about 0.1 μm or more and about 1 μm or less. 
     Incidentally, when a material having conductivity is used as the material of the light shielding film  44 , the light shielding film  44  may be preferably formed so that the end surface of the light shielding film  44  is not in contact with the pixel electrode  12 . Moreover, the structure on the counter substrate  20  side may be preferably a structure as illustrated in  FIG.  10    because the black matrix is omitted. Specifically, CFs  42 R,  42 G, and  42 B of a CF  42  may be preferably formed independently of one another on the counter substrate  20  so that a clearance is formed at a position corresponding to the partition  13 . Moreover an overcoat (OC)  43  is provided on the CF  42  so that the clearance between the CFs  42 R,  42 G, and  42 B in order to improve adhesiveness of the counter substrate  20  and the CF  42 . 
     As described above, in the display unit  6  according to the third embodiment, the light shielding film  44  having light reflectivity is provided on the partition  13 . As a result, similarly to the above-described first embodiment and the like, it is possible to shield the obliquely-emitted light that may enter the adjacent color pixels, and it is possible to provide a display unit that has high chromaticity viewing angle characteristics and is usable as a mirror in a non-display state. 
     5. Application Examples 
     Application examples of the display units  1  and  3  to  6  described in the above-described first to third embodiments and the modifications are described. The display units  1  and  3  to  6  are applicable to electronic apparatuses in every field, such as a television receiver, a digital camera, a notebook personal computer, a mobile terminal such as a mobile phone, and a video camera. As described above, the display unit according to any of the above-described embodiments and the like is applicable to electronic apparatuses in every field that displays a picture signal input from the outside or a picture signal internally generated as an image or a picture. 
     Incidentally, the present technology exerts higher effects in a large-scale television receiver with high definition, a medical display, and electronic apparatuses having a high-pitched display panel such as a smartphone and a mobile phone. 
     Application Example 1 
       FIG.  11 A  illustrates an example of an appearance of a smartphone, and  FIG.  11 B  illustrates another example of an appearance of a smartphone. For example, the smartphone may include a display section  110  (the display unit  1  (or any of the display units  3  to  6 )), a non-display section (a housing)  120 , and an operation section  130 . The operation section  130  may be provided on a front surface of the non-display section  120  as illustrated in  FIG.  11 A , or may be provided on a top surface as illustrated in  FIG.  11 B . 
     Application Example 2 
       FIG.  12    illustrates an appearance of a television receiver according to an application example 2. For example, the television receiver may have a picture display screen section  200  that includes a front panel  210  and a filter glass  220 , and the picture display screen section  200  corresponds to any of the above-described display units  1  and  3  to  6 . 
     Application Example 3 
       FIG.  13 A  is a front view, a left side view, a right side view, a top view, and a bottom view of a mobile phone according to an application example 3 in a closed state.  FIG.  13 B  is a front view and a side view of the mobile phone in an open state. For example, the mobile phone may be configured by connecting an upper housing  310  and a lower housing  320  with a connecting section (a hinge section)  330 , and may include a display  340 , a sub-display  350 , a picture light  360 , and a camera  370 . The display  340  or the sub-display  350  corresponds to any of the above-described display units  1  and  3  to  6 . 
     Hereinbefore, although the technology has been described with referring to the first to third embodiments and the modifications, the technology is not limited to the above-described embodiments and the like, and various modifications may be made. For example, the materials and the thickness of the respective layers, the film formation method, the film formation condition, and the like that are described in the above-described embodiments and the like are not limited thereto, and other materials and other thicknesses may be used, and other film formation methods and formation conditions may be used. 
     Further, each of the layers described in the above-described embodiments and the like is not necessarily provided, and may be appropriately omitted. Moreover, a layer other than the layers descried in the above-described embodiments and the like may be added. Furthermore, the display unit provided with the three color pixels of the red pixel  2 R, the green pixel  2 G, and the blue pixel  2 B as the color pixels has been described as an example in the above-described embodiments and the like. However, a white pixel or a yellow pixel may be combined with these three color pixels. 
     Moreover, in the above-described embodiments and the like, the configuration in which the light emitting elements  10 R,  10 G, and  10 B emit single color light corresponding to the pixels  2 R,  2 G, and  2 B, respectively has been employed. However, a configuration of emitting white light may be employed. Further, although the organic EL element has been described as the light emitting element  10  in the above-described embodiments and the like, an inorganic EL element, a semiconductor layer, a light emitting diode (an LED), and the like may be used. 
     Incidentally, the effects described in the present specification are merely examples without limitation, and other effects may be obtainable. 
     Note that the technology may be configured as follows. 
     (1) A display unit including: 
     a drive substrate having a plurality of pixels with a partition therebetween; and 
     a first light shielding film provided on the partition. 
     (2) The display unit according to (1), wherein 
     each of the pixels includes a light emitting layer, and has an organic layer that is at least partially provided as a layer common to the plurality of pixels, and 
     the first light shielding film is provided between the partition and the organic layer. 
     (3) The display unit according to (1) or (2), wherein 
     the partition has a flat top surface and an inclined side surface, and 
     the first light shielding film is provided on the flat top surface of the partition. 
     (4) The display unit according to (1) or (2), wherein 
     the partition has a flat top surface and an inclined side surface, and 
     the first light shielding film is provided on the flat top surface and the inclined side surface. 
     (5) The display unit according to any one of (1) to (4), further including 
     a black matrix provided on a counter substrate side and having an opening at a position corresponding to the pixel, the counter substrate being disposed to face the drive substrate, wherein 
     the first light shielding film has an end surface on a pixel side rather than an end surface of the opening of the black matrix as viewed from a display surface. 
     (6) The display unit according to (5), further including 
     a second light shielding film between the first light shielding film and the black matrix. 
     (7) The display unit according to any one of (1) to (6), wherein the first light shielding film has light absorbing property. 
     (8) The display unit according to (7), wherein the first light shielding film is formed of carbon (C), chromium oxide (Cr 2 O 3 ), and an alloy of samarium (Sm) and silver (Ag), or an organic material. 
     (9) The display unit according to any one of (1) to (8), wherein the first light shielding film has light reflectivity. 
     (10) The display unit according to (9), wherein the first light shielding film contains one or more of aluminum (Al), chromium (Cr), gold (Au), platinum (Pt), nickel (Ni), copper (Cu), tungsten (W), and silver (Ag). 
     (11) The display unit according to any one of (1) to (10), wherein light emitted from the light emitting layer is different by pixels. 
     (12) The display unit according to any one of (1) to (10), wherein light emitted from the light emitting layer is white light. 
     (13) An electronic apparatus provided with a display unit, the display unit including: 
     a drive circuit having a plurality of pixels with a partition therebetween; and 
     a first light shielding film provided on the partition. 
     It should be understood by those skilled in the art that various modifications, combinations, sub-combinations, and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof.