WO2021171469A1

WO2021171469A1 - Display device

Info

Publication number: WO2021171469A1
Application number: PCT/JP2020/007996
Authority: WO
Inventors: 山本　圭一
Original assignee: シャープ株式会社
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2021-09-02

Abstract

A rollable display device (30) is provided with: a rollable flexible display (1) including a display surface (DM) on which a detection image pattern (SIG) is displayed; a rolling unit (32) that rolls the flexible display (1); an image pattern detection unit (33) that is provided to face part of the display surface (DM); a housing unit (31) that has an opening (34) through which the flexible display (1) is passed, and houses the rolling unit (32); and a control unit that displays the detection image pattern (SIG) on at least part of the display surface (DM) facing the image pattern detection unit (33), and determines a region (DR) located outside the housing unit (31) of the display surface (DM) on the basis of the positional information of the display surface (DM) on which the detection image pattern (SIG) is displayed and a detection result from the image pattern detection unit (33).

Description

Display device

The present disclosure relates to a display device, particularly a rollable display device.

In recent years, various display devices equipped with light emitting elements have been developed, and in particular, display devices equipped with OLEDs (Organic Light Emitting Diodes) and inorganic light emitting diodes or QLEDs (Quantum dot Light Emitting Diodes) are quantum. Display devices equipped with (dot light emitting diodes) are attracting a great deal of attention because they can realize low power consumption, thinning, and high image quality.

A display device equipped with such an OLED, a display device provided with an inorganic light emitting diode or a QLED, or the like, which does not need to be provided with a backlight, can be freely bent and wound up. Applications to possible display devices, that is, rollable display devices, are being actively carried out.

In the case of such a rollable display device, it is necessary to detect how far the flexible display provided in the rollable display device is wound in order to determine the display area. If the detection for determining such a display area is not performed, the display will be performed on the entire display surface of the flexible display, and light emission will occur even in the portion where the display surface is wound. Such a display method also causes a problem that the flexible display itself is damaged due to wasteful power consumption and heat generation in the portion where the display surface is wound.

Therefore, Patent Document 1 below describes that a recognition pattern is provided in the non-display area of the flexible display of the rollable display device to detect how far the flexible display is wound. Further, Patent Document 2 below describes that a slit is provided in the non-display area of the flexible display of the rollable display device to detect how far the flexible display is wound.

Japanese Patent Publication "Japanese Patent Laid-Open No. 2013-37330" (published on February 21, 2013) Japanese Patent Publication "Japanese Patent Laid-Open No. 2007-286094" (published on November 1, 2007)

(A) of FIG. 7 and (b) of FIG. 7 are diagrams for explaining the problems of the conventional rollable display device.

As shown in FIG. 7A, the conventional rollable display device includes a flexible display panel 100, a housing 200, a roll portion 210 housed in the housing 200, and a sensor 300 housed in the housing 200. , The control unit 400 and the like. The flexible display panel 100 is connected to the control unit 400, and displays an image by a signal transmitted from the control unit 400. Further, the flexible display panel 100 moves in and out of the housing 200 in the first direction D101, and the display area is variably exposed to the outside while moving in and out of the housing 200.

As shown in FIG. 7B, the flexible display panel 100 has a display area DA for displaying an image, a non-display area NDA adjacent to the display area DA, and a recognition pattern 120 located in the non-display area NDA. include.

The sensor 300 shown in FIG. 7A recognizes the barcode which is the recognition pattern 120 shown in FIG. 7B, and determines how far the flexible display panel 100 of the rollable display device is wound. Can be detected.

FIG. 8 is a diagram for explaining the problems of the conventional rollable display device.

The conventional rollable display device shown in FIG. 8 uses an optical linear encoder 501 to detect the screen drawer size of the image display unit 503.

As shown in FIG. 8, at the upper end of the image display unit 503, rows 502A and 502B of slits 502 in rows A and B are provided in parallel along the pull-out direction D102. Since the cycles of the slits 502A and 502B in rows A and B are shifted by 1/4 cycle, the output waveform of the linear encoder 501 differs between when the image display unit 503 is pulled out and when it is wound up. In this way, it is possible to detect how far the image display unit 503 is wound.

However, in the case of the conventional rollable display device shown in FIGS. 7A and 7B, the flexible display panel 100 is hidden for providing the recognition pattern 120 in addition to the display area DA for displaying the image. A region NDA needs to be provided separately. Therefore, it is difficult to realize a rollable display device capable of detecting how far the flexible display is wound without increasing the frame area of the flexible display.

Further, in the case of the conventional rollable display device shown in FIG. 8, the image display unit 503 needs to separately provide a non-display area for providing the rows 502A and 502B of the slit 502 in addition to the display area for displaying the image. Therefore, it is difficult to realize a rollable display device capable of detecting how far the flexible display is wound without increasing the frame area of the flexible display.

One aspect of the present disclosure is made in view of the above-mentioned problems, and detects how far the display unit is wound without increasing the frame area of the display unit (flexible display). It is an object of the present invention to provide a display device (rollable display device) capable of performing.

The display device of the present invention solves the above-mentioned problems.
A rollable display unit including a display surface on which a detection image pattern is displayed,
A winding unit that winds up the display unit and
An image pattern detection unit provided so as to face a part of the display surface,
A storage unit having an opening through which the display unit is passed and accommodating the winding unit,
The detection image pattern is displayed on at least a part of the display surface facing the image pattern detection unit, and the position information of the display surface on which the detection image pattern is displayed and the position information of the image pattern detection unit A control unit for determining an area of the display surface located outside the storage unit is provided based on the detection result.

According to one aspect of the present disclosure, there is provided a display device (rollable display device) capable of detecting how far the display unit is wound without increasing the frame area of the display unit (flexible display). can.

(A) is a diagram showing a state when the rollable display device of the first embodiment is off, and (b) and (c) are diagrams showing a flexible display of the rollable display device of the first embodiment, (d). ) Is a diagram showing a state when the rollable display device of the first embodiment is turned on. It is a figure which shows the display surface of the flexible display provided in the rollable display device of Embodiment 1. FIG. It is a figure which shows the schematic structure of the flexible display provided in the rollable display device of Embodiment 1. It is a system block for demonstrating an example of the drive system of the rollable display device of Embodiment 1. (A) is a diagram showing a state when the rollable display device of the second embodiment is on, and (b) and (c) are diagrams showing a flexible display of the rollable display device of the second embodiment. (A) is a diagram showing a state when the rollable display device of the third embodiment is on, and (b) is a diagram showing a flexible display of the rollable display device of the third embodiment. (A) and (b) are diagrams for explaining the problem of the conventional rollable display device. It is a figure for demonstrating the problem of the conventional rollable display device.

The embodiment of the present disclosure will be described as follows based on FIGS. 1 to 6. Hereinafter, for convenience of explanation, the same reference numerals may be added to the configurations having the same functions as the configurations described in the specific embodiments, and the description thereof may be omitted.

[Embodiment 1]
FIG. 1A is a diagram showing a state when the rollable display device (display device) 30 of the first embodiment is off, and FIGS. 1B and 1C are rollable display devices 30. 1 is a diagram showing a flexible display (display unit) 1 of the above, and FIG. 1D is a diagram showing a state when the rollable display device 30 is on.

As shown in FIGS. 1A to 1D, the rollable display device 30 includes a flexible display 1, a storage unit 31, a winding unit 32, a sensor (image pattern detection unit) 33, and the like. It includes a control unit (not shown) (shown in FIG. 3).

As shown in (b) of FIG. 1 and (c) of FIG. 1, the flexible display 1 includes a display surface DM on which the detection image pattern SIG is displayed and can be wound. In the present embodiment, in order to realize the rollable display device 30 having no frame area, the flexible display 1 whose entire surface is the display surface DM is used, but the present invention is not limited to this.

As shown in (a) of FIG. 1 and (d) of FIG. 1, the storage unit 31 is provided with an opening 34 through which the flexible display 1 passes on the upper surface of the storage unit 31, and the winding unit 32 and the winding unit 32. A portion of the flexible display 1 wound around the 32 is stored. The material of the storage portion 31 is not particularly limited, but the storage portion 31 may be formed of, for example, a metal material or a resin material.

As shown in (a) of FIG. 1 and (d) of FIG. 1, the take-up portion 32 is stored inside the storage portion 31, and the flexible display 1 is wound through the opening 34 of the storage portion 31. It is used when unwinding in the unwinding direction D1 or winding the flexible display 1 in the winding direction D2. The user of the rollable display device 30 can wind the flexible display 1 around the winding unit 32 or unwind the flexible display 1 from the winding unit 32, so that the flexible display 1 can be located outside the storage unit 31 according to his / her preference. The area of the display surface DM, that is, the size of the display surface DM located outside the storage unit 31 can be selected. As shown in FIGS. 1A to 1D, the first end E of the display surface DM of the flexible display 1 is from the second end E'of the display surface DM of the flexible display 1. It is wound up first by the winding unit 32.

As shown in FIGS. 1A to 1D, the sensor 33 is provided so as to face a part of the display surface DM on which the detection image pattern SIG is displayed, and the detection image pattern SIG is provided. The light receiving surface has a light receiving surface on the side facing a part of the display surface DM on which is displayed, and the light receiving surface receives the light emitted by the detection image pattern SIG to detect the detection image pattern SIG. .. The detection image pattern SIG is an image pattern for the sensor 33 to detect, but since it is displayed using the display surface DM of the flexible display 1, it is displayed to the user displayed on the display surface DM of the flexible display 1. The normal image pattern for recognition and its emission wavelength region are the same. Therefore, in the present embodiment, a sensor having sensitivity in the visible light region is used as the sensor 33.

In the present embodiment, FIG. 1 is shown so that the extent to which the flexible display 1 is wound, that is, the area of the display surface DM of the flexible display 1 located outside the storage unit 31 can be detected more easily. As shown in (d) of FIG. 1 from (a), the case where the sensor 33 is provided inside the storage portion 31 and on the upper surface of the storage portion 31 provided with the opening 34 will be described as an example. However, it is not limited to this. The sensor 33 can be provided either inside the storage unit 31 or outside the storage unit 31 as long as it can detect the detection image pattern SIG, but when the sensor 33 is provided outside the storage unit 31 Is necessary to remove the influence of external light from the detection result and is recognized by the user of the rollable display device 30, so that it is preferably provided inside the storage unit 31.

Since the position of the light receiving portion of the sensor 33 and the position of the opening 34 do not match, the difference is taken into consideration when determining the area of the display surface DM of the flexible display 1 located outside the storage portion 31. It is preferable to reflect it.

FIG. 2 is a diagram showing a display surface DM of the flexible display 1 provided in the rollable display device 30.

As shown in FIG. 2, a plurality of pixels P11 to Pnm provided on the display surface DM of the flexible display 1 are arranged in a matrix of n rows and m columns (n and m are natural numbers of 2 or more). There is.

Between the second end E'of the display surface DM and the first end E of the display surface DM, along the third direction D3 in FIG. 2, the first row of pixel groups L1 to nth rows The pixel group Ln of the eye is provided in this order. Each of the pixel group L1 in the first row to the pixel group Ln in the nth row is composed of m pixels arranged along the fourth direction D4 in FIG.

In the present embodiment, as shown in FIG. 2, a case where a plurality of pixels P11 to Pnm provided on the display surface DM of the flexible display 1 are arranged in a matrix of n rows and m columns is taken as an example. As will be described, the present invention is not limited to this, and the plurality of pixels P11 to Pnm may be arranged in a shape other than the matrix shape.

Further, in the present embodiment, as shown in FIG. 2, each of the plurality of pixels P11 to Pnm provided on the display surface DM of the flexible display 1 is a red sub-pixel which is a striped first sub-pixel RSP. , A case in which a green sub-pixel which is a striped second sub-pixel GSP and a blue sub-pixel which is a striped third sub-pixel BSP will be described as an example, but the present invention is limited to this. However, each of the plurality of pixels P11 to Pnm may further include, for example, a striped fourth sub-pixel. Further, the plurality of pixels P11 to Pnm may be composed of, for example, a plurality of sub-pixels arranged in a pentile type.

As shown in (b) of FIG. 1 and (c) of FIG. 1, the rollable display device 30 of the present embodiment displays the detection image pattern SIG from the first end E of the display surface DM to the third display surface DM. Display one line at a time toward the two ends E'. That is, the detection image pattern SIG is sequentially displayed in each line from the pixel group Ln in the nth row to the pixel group L1 in the first row.

In the present embodiment, the detection image pattern SIG is aligned with the position where the sensor 33 is provided, and the left edge portion of each row of the pixel group L1 to the nth row of the first row is aligned with the position where the sensor 33 is provided. The case where the image is displayed in the above will be described as an example, but the present invention is not limited to this, and the pixel group L1 to the nth line of the first line is adjusted according to the position where the sensor 33 is provided. The position where the detection image pattern SIG is displayed can be appropriately determined in each line of the pixel group Ln.

Further, in the present embodiment, a case where the detection image pattern SIG is displayed on three adjacent pixels of each row of the pixel group L1 in the first row to the pixel group Ln in the nth row is taken as an example. However, the present invention is not limited to this, and the detection image pattern SIG is displayed on one or more pixels in each row of the pixel group L1 in the first row to the pixel group Ln in the nth row. May be good. Further, the detection image pattern SIG may be displayed on all the pixels in one row of the pixel group L1 in the first row to the pixel group Ln in the nth row. Further, the detection image pattern SIG is at least one of the first sub-pixel RSP, the second sub-pixel GSP, and the third sub-pixel BSP in each row of the pixel group L1 in the first row to the pixel group Ln in the nth row. It may be displayed at one time. Considering that the user of the rollable display device 30 does not recognize the detection image pattern SIG, the detection image pattern SIG is in each row of the pixel group L1 in the first row to the pixel group Ln in the nth row. It is preferable to display on any one of the first sub-pixel RSP, the second sub-pixel GSP, and the third sub-pixel BSP.

In the present embodiment, the sensor 33 has a light receiving surface having a size corresponding to three pixels in one row of the pixel group L1 in the first row to the pixel group Ln in the nth row. However, it is not limited to this. For example, the sensor 33 may have a light receiving surface having a size corresponding to one or more pixels in one row of the pixel group L1 in the first row to the pixel group Ln in the nth row. The size corresponding to at least one of the first sub-pixel RSP, the second sub-pixel GSP, and the third sub-pixel BSP in one row of the pixel group L1 in the first row to the pixel group Ln in the nth row. It may have a light receiving surface, and may have a light receiving surface having a size corresponding to all the pixels in one row of the pixel group L1 in the first row to the pixel group Ln in the nth row. good.

The detection image pattern SIG is a region (first display region) between the first end E and the second end E'of the display surface DM that can face the sensor 33 when the flexible display 1 is wound or unwound. ) Is displayed. That is, the position of the display surface DM of the flexible display 1 facing the light receiving surface of the fixed sensor 33 changes due to the relative movement of the flexible display 1 at the time of winding or unwinding. The detection image pattern SIG is displayed in a part of the region (first display region) that can change in this way. In the present embodiment, since the sensor 33 has a light receiving surface having a size corresponding to three pixels in one row of the pixel group L1 to the nth row in the first row, the sensor 33 has a light receiving surface having a size corresponding to three pixels in one row. The region (first display region) between the first end portion E and the second end portion E'of the display surface DM capable of facing each other is a group of pixels in the first row including pixels P11 to Pn1 shown in FIG. , The pixel group of the second row including the pixels P12 to Pn2 and the pixel group of the third row including the pixels P13 to Pn3.

In the rollable display device 30 of the present embodiment, in order to improve the detection accuracy of how far the flexible display 1 is wound, the detection image pattern SIG is set to the pixel group Ln to the first in the nth row. Each row of the pixel group L1 of the row is sequentially displayed, and the sensor 33 also has a size of the light receiving surface corresponding to one of the detection image pattern SIGs sequentially displayed for each row. It is not limited to. For example, the detection image pattern SIG is sequentially displayed for each of a plurality of adjacent lines, and the sensor 33 also has a size of the light receiving surface corresponding to one of the detection image pattern SIGs that is sequentially displayed for each of a plurality of lines. It may have a sensor.

In the present embodiment, in order to prevent the user of the rollable display device 30 from recognizing the detection image pattern SIG, the detection image pattern SIG is provided at the first end of the display surface DM provided in the storage unit 31. The display is sequentially displayed line by line from the unit E toward the second end E'of the display surface DM, and when the image pattern detection unit 33 detects the detection image pattern SIG, the detection image pattern SIG is erased. However, it is not limited to this. The detection image pattern SIG may be sequentially displayed line by line or line by line from the second end E'of the display surface DM toward the first end E of the display surface DM, for example, at random. It may be displayed sequentially for each line or a plurality of lines selected for.

FIG. 4 is a system block for explaining an example of the drive system of the rollable display device 30.

As shown in FIG. 1A, when the rollable display device 30 is off, the area of the display surface DM of the flexible display 1 located outside the storage unit 31 is the area NDR in which no image pattern is displayed. It has become.

As shown in FIG. 4, in order to turn on the rollable display device 30 in the off state, when the user of the rollable display device 30 turns on the power supply unit 37, the power supply unit 37 sends the sensor 33 to the sensor 33. Sends the signal SINA to turn on.

When the sensor 33 is turned on in response to the signal SINA, the sensor 33 sends a signal SINC notifying the timing controller & position determination unit 35 that the sensor 33 is in the on state.

After receiving the signal SINC, the timing controller & position determination unit 35 sets the display driver 36 to the detection image pattern SIG display mode in order to display the detection image pattern SIG on the display surface DM of the flexible display 1. Send to the display driver 36.

After receiving the signal SIND from the timing controller & position determination unit 35, the display driver 36 enters the detection image pattern SIG display mode, and the pixel group Ln of the nth line closest to the first end E of the display surface DM. A signal SINE for displaying the detection image pattern SIG is sent to the flexible display 1 to the three pixels Pn1, Pn2, and Pn3.

The timing controller & position determination unit 35 and the display driver 36 constitute a control unit that controls the flexible display 1.

The flexible display 1 that has received the signal SINE displays the detection image pattern SIG on the three pixels Pn1, Pn2, and Pn3 of the pixel group Ln in the nth row.

When the sensor 33 detects the detection image pattern SIG displayed on the three pixels Pn1, Pn2, and Pn3 of the pixel group Ln in the nth row, the sensing process of the detection image pattern SIG by the sensor 33 is here. Is finished. However, if the sensor 33 cannot detect the detection image pattern SIG displayed on the three pixels Pn1, Pn2, and Pn3 of the pixel group Ln in the nth row, the sensor 33 is the timing controller & position determination unit. A signal SIGF is sent to 35 to notify that the detection image pattern SIG could not be detected.

After receiving the signal SINF, the timing controller & position determination unit 35 sets the detection image pattern SIG at a different position on the display surface DM of the flexible display 1, and in the present embodiment, sets the detection image pattern SIG on the nth line. A signal SING for displaying on the three pixels Pn-11, Pn-12, and Pn-13 of the pixel group Ln-1 on the n-1th row adjacent to the pixel group Ln is sent to the display driver 36.

After receiving the signal SING from the timing controller & position determination unit 35, the display driver 36 displays the three pixels Pn-11, Pn-12, and Pn-13 of the pixel group Ln-1 on the n-1th line. A signal SINH displaying the detection image pattern SIG is sent to the flexible display 1.

The flexible display 1 that has received the signal SINH displays the detection image pattern SIG on the three pixels Pn-11, Pn-12, and Pn-13 of the pixel group Ln-1 on the n-1th line. ..

The sensing process of the detection image pattern SIG by the sensor 33 described above is repeated until the sensor 33 detects the detection image pattern SIG. Therefore, as shown in FIG. 1 (b), the detection image pattern SIG has a detection image pattern SIG. The display is sequentially displayed line by line from the first end E of the display surface DM toward the second end E'of the display surface DM. FIG. 1B is an example in which the sensor 33 detects the detection image pattern SIG displayed on the three pixels from the left side of the pixel group Ln-900 on the n-900th row.

When the sensor 33 detects the detection image pattern SIG displayed on the three pixels from the left side of the pixel group Ln-900 on the n-900th line, the sensor 33 tells the timing controller & position determination unit 35. Although not shown, a signal is sent to notify that the detection image pattern SIG has been detected.

The timing controller & position determination unit 35 is based on a signal notifying that the detection image pattern SIG has been detected from the sensor 33 and the position information of the display surface DM of the flexible display 1 on which the detection image pattern SIG is displayed. , The area of the display surface DM of the flexible display 1 located outside the storage unit 31 can be determined. Further, when the timing controller & position determination unit 35 receives the signal notifying that the detection image pattern SIG has been detected from the sensor 33, the timing controller & position determination unit 35 erases the detection image pattern SIG and senses the detection image pattern SIG by the sensor 33. End the process.

As shown in FIG. 1 (c), the timing controller & position determination unit 35 has the position information of the display surface DM of the flexible display 1 on which the detection image pattern SIG is displayed, that is, the detection image pattern SIG is the nth position. From the information that the pixels are displayed on the three pixels from the left side of the pixel group Ln-900 on the −900th line, the area of the display surface DM of the flexible display 1 located outside the storage unit 31 can be determined.

As shown in FIG. 1 (c), the timing controller & position determination unit 35 stores the area from the pixel group L1 in the first row to the pixel group Ln-901 in the n-901 rows of the storage unit 31. It can be determined that the area is the area DM of the display surface DM of the flexible display 1 located outside, and only this area can be used as the area DR for displaying a normal image pattern. On the other hand, the region from the pixel group Ln in the nth row to the pixel group Ln-900 in the n-900th row, which is determined to be located inside the storage unit 31, is the region NDR in which no image pattern is displayed. can do.

When the timing controller & position determination unit 35 determines the area of the display surface DM of the flexible display 1 located outside the storage unit 31, the position and opening of the light receiving unit of the sensor 33 are as described above. Since it does not match the position of 34, it is preferable to consider and reflect the difference. For example, when the position of the light receiving portion of the sensor 33 is lower than the position of the opening 34 by three rows of the pixel group, the timing controller & position determination unit 35 may perform the first row of the pixel group L1 to the n-904th row. The area up to the pixel group Ln-904 of the eye may be determined to be the area of the display surface DM of the flexible display 1 located outside the storage unit 31, and only this area may be the area DR for displaying a normal image pattern. It's done. On the other hand, the region from the pixel group Ln in the nth row to the pixel group Ln-903 in the n-903th row, which is determined to be located inside the storage unit 31, is the region NDR in which no image pattern is displayed. Become.

Further, as shown in FIG. 4, when the take-up unit 32 is driven by the user of the rollable display device 30, the take-up unit 32 sends a signal SINB for turning on the sensor 33 to the sensor 33. When the take-up unit 32 sends the sensor 33 the signal SINB for turning on the sensor 33, the power supply unit 37 described above sends the sensor 33 the signal SINA for turning on the sensor 33. Similar to the case of sending, the sensing process of the detection image pattern SIG by the sensor 33 is performed.

Therefore, even when the take-up unit 32 is driven by the user of the rollable display device 30, the timing controller & position determination unit 35 has a signal for notifying that the detection image pattern SIG from the sensor 33 has been detected, and a detection unit. The area of the display surface DM of the flexible display 1 located outside the storage unit 31 can be determined based on the position information of the display surface DM of the flexible display 1 on which the image pattern SIG is displayed.

FIG. 3 is a diagram showing a schematic configuration of a flexible display 1 provided in the rollable display device 30. The flexible display 1 shown in FIG. 3 is merely an example of a flexible display that can be provided by the rollable display device 30, and is not limited thereto.

As shown in FIG. 3, the flexible display 1 includes a resin layer (resin substrate) 12, a barrier layer 3, a thin film transistor layer (TFT layer) 4, a light emitting element 5, and a sealing layer 6 in this order. Has been done.

Examples of the material of the resin layer 12 include, but are not limited to, polyimide resin, epoxy resin, polyamide resin and the like.

The barrier layer 3 is a layer that prevents moisture and impurities from reaching the transistor Tr and the light emitting element 5, and is, for example, a silicon oxide film, a silicon nitride film, or a silicon nitride film formed by CVD, or these. It can be composed of a laminated film of.

The transistor Tr and the capacitive element are provided on the upper layers of the resin layer 12 and the barrier layer 3. The thin film layer 4 including the transistor Tr and the capacitive element includes a semiconductor film 15, an inorganic insulating film (gate insulating film) 16 above the semiconductor film 15, a gate electrode GE above the inorganic insulating film 16, and a gate electrode. The inorganic insulating film (first insulating film) 18 above the GE, the counter electrode CE of the capacitive element above the inorganic insulating film 18, and the inorganic insulating film (second insulation) above the counter electrode CE of the capacitive element. The interlayer insulating film 21 above the inorganic insulating film 20 and the layer SH forming the source electrode, the drain electrode and its wiring, and the layer SH forming the source electrode, the drain electrode and its wiring. And include.

The capacitive element is the same layer as the counter electrode CE of the capacitive element formed directly above the inorganic insulating film 18, the inorganic insulating film 18, and the layer formed directly below the inorganic insulating film 18 and forming the gate electrode GE. It is composed of a capacitive electrode formed so as to overlap with the counter electrode CE of the capacitive element.

A transistor (thin film transistor (TFT)) Tr is configured to include a semiconductor film 15, an inorganic insulating film 16, a gate electrode GE, an inorganic insulating film 18, an inorganic insulating film 20, a source electrode and a drain electrode.

The semiconductor film 15 is composed of, for example, low temperature polysilicon (LTPS) or an oxide semiconductor.

The gate electrode GE, the counter electrode CE of the capacitive element, the source electrode and the drain electrode, and the layer SH forming the wiring thereof are, for example, aluminum (Al), tungsten (W), molybdenum (Mo), tantalum (Ta), and chromium (Ta). It is composed of a single-layer film or a laminated film of a metal containing at least one of Cr), titanium (Ti), copper (Cu), and silver (Ag).

The inorganic insulating films 16/18/20 can be composed of, for example, a silicon oxide (SiOx) film, a silicon nitride (SiNx) film, a silicon nitriding film, or a laminated film thereof formed by a CVD method.

The interlayer insulating film 21 can be made of a coatable photosensitive organic material such as a polyimide resin or an acrylic resin.

The light emitting element 5 includes a first electrode 22 above the interlayer insulating film 21, a functional layer 24 including a light emitting layer above the first electrode 22, and a second electrode 25 above the functional layer 24. .. An edge cover (bank) 23 that covers the edge of the first electrode 22 is formed on the interlayer insulating film 21.

Each of the first sub-pixel RSP, the second sub-pixel GSP, and the third sub-pixel BSP of the flexible display 1 includes an island-shaped first electrode 22, a functional layer 24 including a light emitting layer, and a second electrode 25. The light emitting element 5 is included. The edge cover 23 can be made of a coatable photosensitive organic material such as a polyimide resin or an acrylic resin.

The functional layer 24 is composed of, for example, laminating a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer in this order from the lower layer side. The light emitting layer is formed in an island shape for each of the first sub-pixel RSP, the second sub-pixel GSP, and the third sub-pixel BSP by a vapor deposition method or an inkjet method, but the other layers are solid common layers. You can also. Further, a configuration in which one or more of the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer is not formed is also possible.

The first electrode 22 can be formed by, for example, laminating ITO (Indium Tin Oxide) and an alloy containing Ag, but is not particularly limited as long as conductivity and light reflectivity can be ensured. Further, the second electrode 25 can be made of a translucent conductive material such as ITO (Indium Tin Oxide) and IZO (Indium Zinc Oxide), but if conductivity and translucency can be ensured, it is possible. There is no particular limitation.

The first electrode 22 is provided for each of the first sub-pixel RSP, the second sub-pixel GSP, and the third sub-pixel BSP, and is electrically connected to the drain electrode of the transistor Tr. Further, the second electrode 25 is provided in common to all the first sub-pixel RSP, the second sub-pixel GSP, and the third sub-pixel BSP. Further, the transistor Tr is driven for each of the first sub-pixel RSP, the second sub-pixel GSP, and the third sub-pixel BSP.

In the present embodiment, the case where the light emitting element 5 is an OLED (Organic Light Emitting Diode) will be described as an example, but the present invention is not limited to this, and the light emitting element 5 is, for example, inorganic. It may be a light emitting diode or a QLED (Quantum dot Light Emitting Diode).

The sealing layer 6 is translucent, and has a first inorganic sealing film 26 that covers the second electrode 25, an organic sealing film 27 that is formed above the first inorganic sealing film 26, and an organic sealing. It includes a second inorganic sealing film 28 that covers the film 27. The sealing layer 6 covering the light emitting element 5 prevents foreign substances such as water and oxygen from penetrating into the light emitting element 5.

The first inorganic sealing film 26 and the second inorganic sealing film 28 may each be composed of, for example, a silicon oxide film, a silicon nitride film, a silicon nitride film, or a laminated film thereof formed by CVD. can. The organic sealing film 27 is a translucent organic film thicker than the first inorganic sealing film 26 and the second inorganic sealing film 28, and is made of a coatable photosensitive organic material such as a polyimide resin or an acrylic resin. can do.

In the present embodiment, a seal composed of a one-layer organic film and a two-layer inorganic film provided with an organic sealing film 27 between the first inorganic sealing film 26 and the second inorganic sealing film 28. Although the stop layer 6 has been described as an example, the present invention is not limited to this, and the sealing layer 6 may be formed of only one or more inorganic films or one or more organic films, and two layers. It may be formed of the above-mentioned inorganic film and two or more layers of organic film.

As described above, according to the rollable display device 30 of the present embodiment, it is possible to determine how far the flexible display (display unit) 1 is wound without increasing the frame area of the flexible display (display unit) 1. Can be detected.

[Embodiment 2]
Next, Embodiment 2 of the present invention will be described with reference to FIG. The rollable display device 30'of the present embodiment is a sensor (image) having a light receiving surface having a size corresponding to all the pixels in one row of the pixel group L1 in the first row to the pixel group Ln in the nth row. The pattern detection unit) 33a is provided, which is different from the first embodiment, and the other parts are as described in the first embodiment. For convenience of explanation, members having the same functions as the members shown in the drawings of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 5A is a diagram showing a state when the rollable display device 30'is on, and FIGS. 5B and 5C show a flexible display 1 of the rollable display device 30'. It is a figure.

As shown in FIG. 5A, the rollable display device 30'has a size corresponding to all the pixels in one row of the pixel group L1 in the first row to the pixel group Ln in the nth row. A sensor (image pattern detection unit) 33a having a light receiving surface is provided.

Since the size of the light receiving surface of the sensor 33a is large, the detection image pattern SIGA. Even if SIGA'is displayed, it can be detected.

Therefore, as shown in FIG. 5B, the detection image pattern SIGA is sequentially displayed line by line from the first end E of the display surface DM toward the second end E'of the display surface DM. At the same time, the sensor 33a can detect even an image pattern that sequentially moves to the right side. Although not shown, the detection image pattern SIGA is sequentially displayed line by line from the first end E of the display surface DM toward the second end E'of the display surface DM, and is sequentially displayed. The image pattern may move to the left.

By providing the above-mentioned sensor 33a, a wider variety of detection image patterns can be used.

Further, as shown in FIG. 5 (c), the detection image pattern SIGA'displayed on all the pixels in one row of the pixel group L1 in the first row to the pixel group Ln in the nth row is used. When used, the light receiving sensitivity of the sensor 33a can be improved, and the detection accuracy can be increased.

As shown in (b) of FIG. 5 and (c) of FIG. 5, even when the detection image pattern SIGA or the detection image pattern SIGA'is used, the timing controller & position determination unit 35 is, for example, the first. The area from the pixel group L1 in the row to the pixel group Ln-1800 in the n-1800th line is determined to be the area of the display surface DM of the flexible display 1 located outside the storage unit 31, and only this area is usually used. It can be set as the area DR for displaying the image pattern of. On the other hand, the region from the pixel group Ln in the nth row to the pixel group Ln-1799 in the n-1799th row, which is determined to be located inside the storage unit 31, is the region NDR in which no image pattern is displayed. Can be done.

[Embodiment 3]
Next, Embodiment 3 of the present invention will be described with reference to FIG. The rollable display device 30 ″ of the present embodiment includes a first winding unit 40a and a second winding unit 40b, which are arranged apart from each other as a winding unit, and serves as a sensor (image pattern detecting unit). It differs from the first and second embodiments in that it includes the sensor (first image pattern detection unit) 33b and the sensor (second image pattern detection unit) 33c, and the others are as described in the first and second embodiments. be. For convenience of explanation, members having the same functions as the members shown in the drawings of the first and second embodiments are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 6A is a diagram showing a state when the rollable display device 30 ″ is on, and FIG. 6B is a diagram showing a flexible display 1 of the rollable display device 30 ″.

As shown in FIGS. 6A and 6B, the detection image pattern displayed on the display surface DM of the flexible display 1 of the rollable display device 30'' is on the display surface DM of the flexible display 1. Includes a first detection image pattern SIGB and a second detection image pattern SIGC that are displayed apart.

Further, the take-up portion included in the rollable display device 30 ″ includes a first take-up portion 40a and a second take-up portion 40b which are arranged apart from each other.

Further, the sensor (image pattern detection unit) included in the rollable display device 30'' is a sensor (first image pattern) provided so as to face a part of the display surface DM on which the first detection image pattern SIGB is displayed. The detection unit) 33b and a sensor (second image pattern detection unit) 33c provided so as to face a part of the display surface DM on which the second detection image pattern SIGC is displayed are included.

The first detection image pattern SIGB is a region (first) between the first end E and the second end E'of the display surface DM that can face the sensor 33b when the flexible display 1 is wound or unwound. It is displayed in a part of the display area). That is, the position of the display surface DM of the flexible display 1 facing the light receiving surface of the fixed sensor 33b changes due to the relative movement of the flexible display 1 at the time of winding or unwinding. The first detection image pattern SIGB is displayed in a part of the region (first display region) that can change in this way.

On the other hand, the second detection image pattern SIGC is a region between the first end E and the second end E'of the display surface DM that can face the sensor 33c when the flexible display 1 is wound or unwound. It is displayed in a part of the first display area). That is, the position of the display surface DM of the flexible display 1 facing the light receiving surface of the fixed sensor 33c changes due to the relative movement of the flexible display 1 at the time of winding or unwinding. The second detection image pattern SIGC is displayed in a part of the region (first display region) that can change in this way.

The control unit that controls the flexible display 1, including the timing controller & position determination unit 35 and the display driver 36, shown in FIG. 4 is on at least a part of the display surface DM facing the first image pattern detection unit 33b. 1 The detection image pattern SIGB is displayed, and the second detection image pattern SIGC is displayed on at least a part of the display surface DM facing the second image pattern detection unit 33c. Then, the control unit that controls the flexible display 1 includes the position information of the display surface DM on which the first detection image pattern SIGB and the second detection image pattern SIGC are displayed, and the first image pattern detection unit 33b and the second image. Based on the detection result of the pattern detection unit 33c, the area of the display surface DM of the flexible display 1 located outside the storage unit 31 is determined.

As shown in FIGS. 6A and 6B, in the rollable display device 30'', the first detection image pattern SIGB is a flexible display wound around the first winding unit 40a. It is preferable that the second detection image pattern SIGC is displayed on the display surface DM of 1 and is displayed on the display surface DM of the flexible display 1 wound around the second winding unit 40b. With such a configuration, there is a difference between the display surface DM of the flexible display 1 wound around the first winding unit 40a and the display surface DM of the flexible display 1 wound around the second winding unit 40b. The case where the flexible display 1 is not evenly stored on the left and right sides can be easily detected by the first image pattern detection unit 33b and the second image pattern detection unit 33c.

It is preferable that each of the first winding portion 40a and the second winding portion 40b is provided with a stepping motor. With such a configuration, when the flexible display 1 is not evenly stored in the storage portion 31 described above, the first winding portion 40a and the second winding portion 40b are individually and stepwise. The flexible display 1 can be evenly stored in the storage unit 31 on the left and right sides.

Since the size of the flexible display 1 included in the rollable display devices 30 and 30'30'' of the above-described first to third embodiments is not particularly limited, the rollable display devices 30 and 30'30'' are limited to large televisions. However, it can also be applied to, for example, a portable display device.

〔summary〕
[Aspect 1]
A rollable display unit including a display surface on which a detection image pattern is displayed,
A winding unit that winds up the display unit and
An image pattern detection unit provided so as to face a part of the display surface,
A storage unit having an opening through which the display unit is passed and accommodating the winding unit,
The detection image pattern is displayed on at least a part of the display surface facing the image pattern detection unit, and the position information of the display surface on which the detection image pattern is displayed and the position information of the image pattern detection unit A display device including a control unit that determines an area of the display surface located outside the storage unit based on a detection result.

[Aspect 2]
The first end portion of the display surface is wound before the winding portion from the second end portion of the display surface.
The first display area of the display surface is an area between the first end portion and the second end portion of the display surface that can face the image pattern detection unit when the display unit is wound or unwound. And
The detection image pattern moves to a part of the first display area from one of the first end portion and the second end portion toward the other of the first end portion and the second end portion. The display device according to the first aspect, which is displayed while being displayed.

[Aspect 3]
The display surface includes a plurality of pixels composed of a plurality of sub-pixels.
The plurality of pixels are arranged in n rows and m columns (n and m are two or more natural numbers).
The display device according to aspect 2, wherein the detection image pattern is sequentially displayed one line at a time from the first end portion toward the second end portion on one or more of the sub-pixels in the line.

[Aspect 4]
The display surface includes a plurality of pixels composed of a plurality of sub-pixels.
The plurality of pixels are arranged in n rows and m columns (n and m are two or more natural numbers).
The display device according to aspect 2, wherein the detection image pattern is sequentially displayed one line at a time from the second end portion toward the first end portion on one or more of the sub-pixels in the line.

[Aspect 5]
The display device according to

aspect

3 or 4, wherein the image pattern detection unit has a light receiving surface having a size corresponding to one or more of the sub-pixels in one row of the plurality of pixels.

[Aspect 6]
The display device according to any one of aspects 3 to 5, wherein the image pattern detection unit has a light receiving surface having a size corresponding to all the pixels in one row of the plurality of pixels.

[Aspect 7]
The display device according to any one of aspects 3 to 6, wherein the detection image pattern is displayed on one of the sub-pixels.

[Aspect 8]
The detection image pattern includes a first detection image pattern and a second detection image pattern that are displayed apart from the display surface.
The take-up portion includes a first take-up portion and a second take-up portion, which are arranged apart from each other.
The image pattern detection unit includes a first image pattern detection unit provided so as to face a part of the display surface and a second image pattern detection unit provided so as to face another part of the display surface. Including part
The control unit attaches the first detection image pattern to at least a part of the display surface facing the first image pattern detection unit, and at least a part of the display surface facing the second image pattern detection unit. The second detection image pattern is displayed, the position information of the display surface on which the first detection image pattern and the second detection image pattern are displayed, and the first image pattern detection unit. The display device according to any one of aspects 1 to 4, wherein the area of the display surface located outside the storage unit is determined based on the detection result of the second image pattern detection unit.

[Aspect 9]
The first detection image pattern is displayed on the display surface of the display unit wound around the first winding unit.
The display device according to aspect 8, wherein the second detection image pattern is displayed on the display surface of the display unit wound around the second winding unit.

[Aspect 10]
The display device according to aspect 8 or 9, wherein each of the first winding unit and the second winding unit includes a stepping motor.

[Aspect 11]
The display device according to any one of aspects 1 to 10, wherein the image pattern detection unit is housed in the storage unit.

[Aspect 12]
The control unit displays the detection image pattern when the power of the display unit is turned on or when the winding unit is driven.
The display device according to any one of aspects 1 to 11, wherein the control unit erases the detection image pattern when the image pattern detection unit detects the detection image pattern.

[Aspect 13]
The display device according to any one of aspects 1 to 12, wherein the display unit is the display surface as a whole.

[Aspect 14]
Each of the plurality of pixels provided on the display surface of the display unit includes a plurality of sub-pixels.
Each of the plurality of sub-pixels includes a light emitting element, and includes a light emitting element.
The display device according to any one of aspects 1 to 13, wherein the light emitting element is an organic light emitting diode or a quantum dot light emitting diode.

[Additional notes]
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

The present invention can be used as a display device.

1 Flexible display (display unit)
5 Light emitting element 24 Functional layer including light emitting layer 30, 30', 30'' Rollable display device (display device)
31 Storage unit 32 Winding unit 33 Sensor (image pattern detection unit)
33a sensor (first image pattern detector)
33b sensor (second image pattern detector)
34 Opening 35 Timing controller & position determination unit (control unit)
36 Display driver (control unit)
37 Power supply unit 40a 1st winding unit 40b 2nd winding unit DM display surface E 1st end part E'2nd end D1 unwinding direction D2 winding direction SIG, SIGA, SIGA'Detection image pattern SIGB 1st Image pattern for detection SIGC 2nd image pattern for detection RSP, GSP, BSP Sub pixel P11 to Pnm pixel L1 to Ln pixel group DR Image pattern display area (display surface area located outside the storage unit)

Claims

A rollable display unit including a display surface on which a detection image pattern is displayed,
A winding unit that winds up the display unit and
An image pattern detection unit provided so as to face a part of the display surface,
A storage unit having an opening through which the display unit is passed and accommodating the winding unit,
The detection image pattern is displayed on at least a part of the display surface facing the image pattern detection unit, and the position information of the display surface on which the detection image pattern is displayed and the position information of the image pattern detection unit A display device including a control unit that determines an area of the display surface located outside the storage unit based on a detection result.
The first end portion of the display surface is wound before the winding portion from the second end portion of the display surface.
The first display area of the display surface is an area between the first end portion and the second end portion of the display surface that can face the image pattern detection unit when the display unit is wound or unwound. And
The detection image pattern moves from one of the first end portion and the second end portion toward the other of the first end portion and the second end portion in a part of the first display area. The display device according to claim 1, which is displayed while being displayed.
The display surface includes a plurality of pixels composed of a plurality of sub-pixels.
The plurality of pixels are arranged in n rows and m columns (n and m are two or more natural numbers).
The display device according to claim 2, wherein the detection image pattern is sequentially displayed one line at a time from the first end portion toward the second end portion on one or more of the sub-pixels in the line. ..
The display surface includes a plurality of pixels composed of a plurality of sub-pixels.
The plurality of pixels are arranged in n rows and m columns (n and m are two or more natural numbers).
The display device according to claim 2, wherein the detection image pattern is sequentially displayed one line at a time from the second end portion toward the first end portion on one or more of the sub-pixels in the line. ..
The display device according to claim 3 or 4, wherein the image pattern detection unit has a light receiving surface having a size corresponding to one or more of the sub pixels in one line of the plurality of pixels.
The display device according to any one of claims 3 to 5, wherein the image pattern detection unit has a light receiving surface having a size corresponding to all the pixels in one line of the plurality of pixels.
The display device according to any one of claims 3 to 6, wherein the detection image pattern is displayed on one of the sub-pixels.
The detection image pattern includes a first detection image pattern and a second detection image pattern that are displayed apart from the display surface.
The take-up portion includes a first take-up portion and a second take-up portion, which are arranged apart from each other.
The image pattern detection unit includes a first image pattern detection unit provided so as to face a part of the display surface and a second image pattern detection unit provided so as to face another part of the display surface. Including part
The control unit attaches the first detection image pattern to at least a part of the display surface facing the first image pattern detection unit, and at least a part of the display surface facing the second image pattern detection unit. The second detection image pattern is displayed, the position information of the display surface on which the first detection image pattern and the second detection image pattern are displayed, and the first image pattern detection unit. The display device according to any one of claims 1 to 4, wherein the area of the display surface located outside the storage unit is determined based on the detection result of the second image pattern detection unit.
The first detection image pattern is displayed on the display surface of the display unit wound around the first winding unit.
The display device according to claim 8, wherein the second detection image pattern is displayed on the display surface of the display unit wound around the second winding unit.
The display device according to claim 8 or 9, wherein each of the first take-up section and the second take-up section includes a stepping motor.
The display device according to any one of claims 1 to 10, wherein the image pattern detection unit is housed in the storage unit.
The control unit displays the detection image pattern when the power of the display unit is turned on or when the winding unit is driven.
The display device according to any one of claims 1 to 11, wherein the control unit erases the detection image pattern when the image pattern detection unit detects the detection image pattern.
The display device according to any one of claims 1 to 12, wherein the entire display surface is the display surface.
Each of the plurality of pixels provided on the display surface of the display unit includes a plurality of sub-pixels.
Each of the plurality of sub-pixels includes a light emitting element, and includes a light emitting element.
The display device according to any one of claims 1 to 13, wherein the light emitting element is an organic light emitting diode or a quantum dot light emitting diode.