JP2022140272A - Display, photoelectric conversion device, and electronic apparatus - Google Patents

Abstract

To provide a technique advantageous for high definition while maintaining a high frame rate of a display.SOLUTION: In a display, arranged are a plurality of pixels arranged to form a plurality of rows and a plurality of columns, a plurality of first column signal lines supplying signal voltage according to video data to the plurality of pixels, and at least one second column signal line supplying reference voltage to the plurality of pixels. The plurality of first column signal lines and the at least one second column signal line are arranged along the columns of the plurality of pixels. The at least one second column signal line is connected in common to pixels in at least two columns of the plurality of pixels.SELECTED DRAWING: Figure 2

Description

The present invention relates to display devices, photoelectric conversion devices, and electronic devices.

A display device using an organic electroluminescence (hereinafter referred to as organic EL) film is provided with a light-emitting element in each pixel, and displays an image by individually controlling light emission. In Patent Document 1, a first video signal line to which a signal voltage corresponding to video data is applied and a second video signal line to which a reference voltage of the video data is applied are separately arranged along each column of pixels. . Here, the first pixel row and the adjacent second pixel row are initialized and threshold-compensated at the same time. After that, a display device has been proposed that achieves high definition while suppressing the occurrence of display defects by sequentially writing predetermined video data.

JP 2018-045186 A

In the above example, two video signal lines are arranged between each pixel, which may limit the high definition of the display device. SUMMARY OF THE INVENTION An object of the present invention is to provide a technique that is advantageous for achieving high definition while maintaining a high frame rate of a display device.

In view of the above problems, the display device of the present invention provides a plurality of pixels arranged to form a plurality of rows and a plurality of columns, and a plurality of second pixels for supplying signal voltages according to video data to the plurality of pixels. A display device in which a first column signal line and at least one second column signal line for supplying a reference voltage to the plurality of pixels are arranged, wherein the plurality of pixels each include a light emitting element and the light emitting element a first selection transistor for supplying the signal voltage from the first column signal line to the control electrode of the drive transistor; and a reference voltage from the second column signal line for the drive transistor. and a second selection transistor for supplying a control electrode, wherein the plurality of first column signal lines and the at least one second column signal line are arranged along the columns of the plurality of pixels, and the at least One second column signal line is commonly connected to pixels in at least two columns among the plurality of pixels via the second selection transistor.

According to the present invention, it is possible to provide a technique that is advantageous for achieving high definition while maintaining a high frame rate of the display device.

1 is a schematic configuration diagram of a display device according to an embodiment of the present technology; FIG. 1 is a circuit example of a pixel according to one embodiment; 4 is a timing chart for explaining a method of driving pixels; FIG. 1 is a configuration example of a display device according to an embodiment; 1 is a configuration example of a display device according to an embodiment; 1 is a configuration example of a display device according to an embodiment; 1 is a configuration example of a display device according to an embodiment; 4A and 4B are diagrams for explaining driving timings of pixels according to the embodiment; FIG. 1 is a plan view for explaining the arrangement of display devices according to one embodiment; FIG. An application example of the display device of the present disclosure. (A) An example of an imaging device. (B) An example of an electronic device. (A) An example of a display device. (B) An example of a foldable display device. (A) An example of a wearable device. (B) An example of a wearable device having an imaging device.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. In addition, the following embodiments do not limit the invention according to the scope of claims. Although multiple features are described in the embodiments, not all of these multiple features are essential to the invention, and multiple features may be combined arbitrarily. Furthermore, in the accompanying drawings, the same or similar configurations are denoted by the same reference numerals, and redundant description is omitted.

FIG. 1 is a schematic configuration diagram of a display device according to the present disclosure. The display device 1 has a scanning signal line driving circuit 80, a column signal line driving circuit 90, and a plurality of pixels 100 including light emitting elements. A plurality of scanning signal lines 30 are connected to the scanning line driving circuit 80 , and a plurality of column signal lines 20 are connected to the column signal line driving circuit 90 . Note that the pixel 100(i, j) here represents a pixel arranged in the i-th row and the j-th column among the pixels arranged to form a plurality of rows and a plurality of columns.

An outline of a pixel circuit and signal lines will be described with reference to the circuit diagram shown in FIG. A first column signal line 101 and a second column signal line 102 are connected to the column signal line driving circuit 90 . A first scanning signal line 105 , a second scanning signal line 106 , a third scanning signal line 107 , a fourth scanning signal line 108 and a power supply line 109 are connected to the scanning line drive circuit 80 . Each line is connected to each transistor in the pixel circuit 110 included in the pixel 100, respectively.

Pixel 100(i,j) will now be described. Pixel 100 (i, j) and pixel 100 (i, j+1) have a first select transistor 103 , a pixel circuit 110 and a second select transistor 104 . The signal of the second column signal line 102 is passed through the common signal line 116, and the output of the second selection transistor 104 becomes the input signal to each pixel circuit 110. FIG.

The first column signal lines 101(j) and 101(j+1) are supplied with signal voltages (hereinafter referred to as signal voltages) from the column signal line driving circuit 90 according to video data. The second column signal line 102 ( j ) is supplied with a voltage that serves as a reference for video data (hereinafter referred to as a reference voltage) from the column signal line driving circuit 90 . The reference voltage is used for pixel resetting and drive transistor threshold compensation. In this embodiment, the reference voltage supplied from the second column signal line 102(j) is applied to the pixels arranged in rows (eg, 100(i,j), 100(i,j+1), 100(i,j+2)). A signal pulse for driving the pixels is supplied from the scanning signal line driving circuit 80 to the pixels via the scanning signal lines 105 to 108. Note that the pixel circuit 110 is also written in common to . has a first holding capacitor 121, a second holding capacitor 122, a light emitting element 123, a drive transistor 124, a light emission control transistor 125, and a reset transistor 126. Here, the transistors are described as having a P-type MOS structure. There is no limitation, and N-type MOS transistors may be used, or a combination thereof may be used, in which case circuit connections may be changed as appropriate.

FIG. 3 is a timing diagram illustrating how the circuit of FIG. 2 is driven. As a specific drive, the voltage VLIN_R of the second column signal line 102 is set to the reference voltage ref by time T1. At time T1, SEL_ref1 is controlled to turn on the second selection transistor 104, and the reference voltage ref is written to the connection point between the control electrode (gate) of the drive transistor 124 and one of the second storage capacitors 122. At the same time, RES1_Tr is controlled to turn on the reset transistor 126 to discharge the charge of the node 1 to which one of the first holding capacitors 121 and one of the second holding capacitors 122 are connected, thereby resetting the potential.

At time T2, ILM1_Tr is controlled to turn on the light emission control transistor 125 to precharge the node 1, and at time T3, ILM1_Tr is controlled to turn off the light emission control transistor 125. FIG. As a result, the terminal voltage of the holding capacitor 122 changes until it stabilizes, thereby holding the threshold voltage of the driving transistor 124 with respect to the reference voltage. The second selection transistor 104 is turned off at time T4, and the first selection transistor 103 is turned on by controlling SEL_sig1 at time T5. As a result, the signal voltage sig1 that is the voltage VLIN_D of the first column signal line 101 is written to one connection point between the gate of the driving transistor 124 and the second holding capacitor 122 . After that, at time T6, the first selection transistor 103 is turned off to hold the written signal voltage. At time T7, ILM1_Tr is controlled to turn on the light emission control transistor 125, and the light emitting element 123 emits light. Thereafter, the next lines are displayed in order.

In this embodiment, the reference voltage and the signal voltage can be written in separate column signal lines compared to the conventional case where one column signal line is arranged along each column of pixels. Writes can be performed at high frame rates with minimal influence of constants. In addition, by sharing the second column signal line 102 to which the reference voltage is written by a plurality of pixels, it is possible to narrow the intervals between the pixels arranged along the row, and it is possible to realize a high-definition display device. .

4A and 4B, an embodiment in which a pixel having a different emission color is used as a unit will be described. In this embodiment, as pixels 200 having different emission colors, an R pixel that controls red emission, a G pixel that controls green emission, and a blue pixel are used as pixels 200 that emit different colors. The B pixel that controls the light emission of is described as an example. In this embodiment, adjacent pixels are arranged to emit light of different colors. Pixels 200 having different emission colors are grouped one by one to form one unit. This unit is called a pixel unit 115 . In the present embodiment, the pixel units 115 are arranged in a stripe pattern, but the arrangement is not limited to this. In this embodiment, one second column signal line 202 is arranged for three pixels 200 included in the pixel unit 115, and these are shared by the three pixels 200, and the second selection transistor 204 is used for common communication. A reference signal is written to the three pixels 200 via line 216 . Note that the materials used for the organic EL films used in the pixels with different emission colors are based on the premise that the emission intensities are in the relationship of G pixels>R pixels>B pixels. Pixels are arranged in order of blue (B) and red (R). The following embodiments will also be described on the premise of this relationship.

In FIG. 4 , the second column signal line 202 is preferably arranged in the green (G) pixel of the unit 115 . When the pixels 200 are laid out at equal intervals, the pixels in which the second column signal lines 202 are arranged may have a narrower area in the pixels than the pixels in which they are not arranged. Due to the relationship between the light emission intensity, which is the premise described above, the G pixel requires less current to flow through the light emitting element than the R pixel and the B pixel. be. Therefore, the second column signal line 202 is arranged in the G pixel. As a result, in this example, even if the pixel circuits included in the pixel 200 are arranged at equal intervals, it is possible to suppress a decrease in light emission intensity. However, the arrangement in the G pixel is an example, and it can be arranged in pixels of other emission colors depending on the purpose and application and the material used for the organic EL film. According to this embodiment, by separating the first column signal line 101 and the second column signal line 202, signals can be written to the pixels at high speed. Further, by sharing the second column signal line 202 in the pixel unit 115, the interval between pixels can be narrowed and the area of the pixel layout can be reduced. This makes it possible to achieve high definition while maintaining a high frame rate.

An arrangement in which the second selection transistor 404 and the second column signal line 402 are shared for each emission color will be described with reference to FIG. In FIG. 5, the second selection transistor 404 and the second column signal line 402 are arranged in a dummy pixel area outside the effective pixel area including optical black pixels (OB) that do not emit light and pixels that are not used for light emission display. should be placed.

In this embodiment, dummy pixels are arranged at the outermost pixels of a plurality of pixels of the display device, and the second column signal line 402 is arranged in the area where the dummy pixels are arranged. FIG. 5 shows an example in which columns in which 400(1,1) to 400(1,3) are arranged are dummy pixels. The second column signal line 402 can be laid out without affecting the arrangement intervals of the pixels of each emission color in the effective pixel area. Note that the reference voltage is written to the pixels of the same emission color in each row via common signal lines 416 (here, three for each row) provided for each emission color. The common signal lines 416 must be arranged so as to cross the first column signal lines 101 in the same number as the emitted colors. Due to the arrangement of the common signal line 416, high definition in the direction intersecting the scanning signal lines 105-108, the power supply line 109, and the common signal line 416 can be lower than in the embodiment of FIG. However, it is possible to suppress the deterioration of high definition in the direction parallel to the common signal line 416, that is, in the pixels arranged in rows. Also in this embodiment, it is possible to achieve high definition while maintaining a high frame rate. In addition, since the common signal line 416 crosses the first column signal line 101 by the number of emitted colors, the coupling capacitance between the signal lines is larger than in the above embodiment, and the effect of increasing the frame rate is reduced. I can. However, the increased number of common signal lines 416 may provide better reference voltage supply and thus less sensitivity to variations in the reference voltage. Also in this embodiment, it is advantageous to arrange the second column signal lines 402 in the dummy pixel regions of the plurality of arranged pixels 400, but it is not necessary to arrange them in the dummy pixel regions. Also, the area where the second column signal line 402 is arranged may be any area that has little influence on the display, even if it is not the outermost circumference.

An example in which the second column signal line 602 is arranged on the outermost periphery of the region in which the plurality of pixels 600 are arranged will be described with reference to FIG. In this embodiment, the second column signal line 602 can be arranged in an area where dummy pixels including optical black (OB) pixels are arranged, outside the effective pixel area where light emitting display is performed. In this embodiment, a plurality of pixels 600 arranged along a row crossing the first column signal line 101 share the second column signal line 602 .

In the present embodiment, the dummy pixels can be arranged in the outermost periphery of the columns in the area where the pixels of the display device are arranged, and the second column signal line 602 can be arranged in the dummy pixel area. Therefore, the layout can be made without affecting the intervals between the pixels of each emission color in the effective pixel area. Also, one common signal line 616 is arranged for each pixel 600 arranged along the direction crossing the first column signal line 101 . In other words, one common signal line 616 is provided for every plurality of pixels 600 arranged in rows. Therefore, the structure of this embodiment is advantageous in achieving high definition in the direction crossing and parallel to the scanning signal lines 105 to 108, the power supply line 109, and the common signal line 616. FIG. In particular, since the second column signal line 602 can be arranged in the outermost pixels where the dummy pixels are arranged, it is easy to achieve a high frame rate and high definition. Coupling capacitance is also reduced compared to the embodiment in which the same number of common signal lines as the number of emission colors are arranged, so the effect of increasing the frame rate can be increased.

An example of sharing a second column signal line by short-circuiting a plurality of common signal lines 616 arranged along rows of pixels arranged to form a plurality of rows and a plurality of columns will be described with reference to FIG. do. This embodiment is applicable to each of the embodiments described above. FIG. 7 will be described as a modification of the embodiment of FIG. In FIG. 6, the second column signal line 602 is arranged in the pixels of the emission color in the first column of the pixels 600 arranged to form a plurality of rows and a plurality of columns. In the example shown in FIG. 7, in addition to the configuration shown in the embodiment of FIG. 616 are shorted together. In FIG. 7, the common signal lines 616 arranged in a plurality of rows are short-circuited by a short-circuit signal line 620. If one short-circuit signal line 620 is arranged between pixels in a plurality of columns, it is parallel to the first column signal line. It is advantageous for realization of high definition in various directions.

High definition in the direction parallel to the scanning signal lines 105 to 108, the power supply line 109, and the common signal line 616 can have the same effect as in the example of FIG. In the direction intersecting with the common signal line 616, the arrangement of the short-circuit signal line 620 for short-circuiting the common signal line 616 is disadvantageous to high definition. However, by short-circuiting the common signal line 616, it is advantageous to reduce the resistance of the reference voltage supply. Therefore, even if the adverse effect of the increase in coupling capacitance is taken into account, the influence of the time required for the reference voltage to settle can be reduced. Therefore, resistance to fluctuations in the reference voltage can be enhanced. In addition, one short-circuit signal line 620 is arranged for a plurality of columns to suppress deterioration in high definition. It is also possible to minimize the time until the reference voltage is stabilized by turning on the second selection transistors 604 provided in a plurality of rows at once.

Further, although not shown, by sharing the first column signal line 101 and the first selection transistor 103 among the pixels of a plurality of emission colors, it becomes possible to achieve higher definition.

An example of driving timing of pixels according to the above embodiments will be described. In this embodiment, a driving method capable of achieving a higher frame rate for each of the above-described embodiments will be described. Here, the configuration example of FIG. 4 will be described using FIG. 8, which is a simplified version of the timing chart of FIG. FIG. 8 shows the timing of the reference and signal voltages to the pixel 200. FIG. In FIG. 8, N1, N2 and N3 respectively represent the driving of the pixels 200 arranged in different rows parallel to the first column signal line 101 of FIG. Specifically, for example, N1 represents the driving of pixels 200(1,1), 200(1,2), 200(1,3) . . . 200(1,n). N2 represents driving of the pixels 200(2,1), 200(2,2), 200(2,3) . . . 200(2,n). N3 represents driving of pixels 200(3,1), 200(3,2), . . . 200(3,n).

Driving starts at time T1, writes the reference voltages to the pixels 200(1,1), 200(1,2), 200(1,3), . Write the signal voltage from From time T3, after writing the reference voltages to the pixels 200(2,1), 200(2,2), 200(2,3), . Write voltage. 200(2,n) from time T3 is written to pixels 200(1,1), . . . 200(1,n) from time T2. It is included in the period of the signal voltage and the period overlaps. In the example of FIG. 8, by driving in this manner, the time required for the reference voltage to stabilize can be included in the period of the signal voltage, so the time required for driving can be greatly reduced. This drive enables a higher frame rate. As the wiring length of the second column signal line 202 increases, it takes time for settling. Although the configuration of FIG. 4 has been described as an example, in other embodiments, a high frame rate can be realized by overlapping the write period of the signal voltage and the write period of the reference voltage.

An example of a specific wiring layout of the display device will be described with reference to FIG. FIG. 9 is a plan view of a portion of pixels arranged in a matrix. Here, FIG. 9 will be described with an example of three pixels arranged side by side as shown in FIG. An element region 501 shown in FIG. 9 is a region where transistors, storage capacitors, and light emitting elements included in the pixel 200 are arranged. Wiring for driving the pixels 200 is also arranged. An image signal line 502 corresponding to the first column signal line 101, a reference signal line 507 corresponding to the second column signal line 202, and a local reference signal line 506 corresponding to the common signal line 616 are arranged. A power supply voltage line 503 connected to the power supply line 109 and a reference GND line 504 serving as a reference voltage for the light emitting element are also arranged. The pixel 200 has storage capacitors 121 and 122 . As for the holding capacitors 121 and 122, in FIG. 9, a shield wiring 505 is arranged between pixels arranged along a row in order to reduce interference between the pixels 200 due to adjacent holding capacitors. The shield wiring is not limited to the arrangement shown in FIG. It may be arranged so as to surround the holding capacitor.

Here, part of the shield wiring 505 is used as a reference signal line 507 for supplying a reference voltage. Writing the reference voltage to the pixel 200 is performed by using the shield wiring 505 as an input line to the pixel and combining the connection with the local reference signal line 506 . A reference voltage from the reference signal line 5071 is written to the shield wiring 505 between each pixel through the local reference signal line 506 . A reference voltage is supplied to the pixel through the shield wiring 505 . Further, the second column signal line 202 may also be used as a shield wiring. When the second column signal line is used as the shield wiring, the width of the second column signal line should be larger than the width of the first column signal line. A larger shielding effect can be expected if the width of the wiring is wider than that of the normal wiring. In this case, the number of additional wirings for supplying the reference voltage can be suppressed, so the layout interval of the pixels 200 in plan view can be reduced.

Next, a device using the display device of this embodiment will be described with reference to FIG. Display device 1000 may have touch panel 1003 , display panel 1005 , frame 1006 , circuit board 1007 , and battery 1008 between upper cover 1001 and lower cover 1009 . Flexible printed circuits FPC 1002 and 1004 are connected to the touch panel 1003 and the display panel 1005 . Circuit elements such as transistors are mounted on the circuit board 1007 . The display device 1 according to this embodiment can be applied to the display panel 1005 . The display panel 1005 can be driven by transistors mounted on the circuit board 1007 . The battery 1008 may not be provided unless the display device is a portable device, and even if the display device is a portable device, it is not necessary to be provided at this position.

The display device according to this embodiment may have color filters having red, green, and blue colors. The color filters may be arranged in a delta arrangement of said red, green and blue. The display device according to this embodiment may be used in the display section of a mobile terminal. In that case, it may have both a display function and an operation function. Mobile terminals include mobile phones such as smart phones, tablets, head-mounted displays, and the like.

The display device according to the present embodiment may be used in the display section of an imaging device having an optical section having a plurality of lenses and an imaging device that receives light that has passed through the optical section. The imaging device may have a display unit that displays information acquired by the imaging device. Further, the display section may be a display section exposed to the outside of the imaging device, or may be a display section arranged within the viewfinder. The imaging device may be a digital camera or a digital video camera.

FIG. 11A is a schematic diagram showing an example of an imaging device according to this embodiment. The imaging device 1100 may have a viewfinder 1101 , a rear display 1102 , an operation unit 1103 and a housing 1104 . The display device 1 according to this embodiment can be applied to the viewfinder 1101 . In that case, the display device 1 may function as a display unit and display not only the captured image but also environmental information, imaging instructions, and the like. The environmental information may include the intensity of outside light, the direction of outside light, the moving speed of the subject, the possibility of the subject being blocked by an obstacle, and the like.

Since the timing suitable for imaging is short, it is better to display the information as early as possible. Therefore, it is preferable to use the light-emitting portion using the organic light-emitting element according to the embodiment for the display device. This is because the response speed of the organic light emitting device is generally faster than that of the liquid crystal display device. A display device using an organic light-emitting element is preferably used for a device requiring high display speed.

The imaging device 1100 has an optical unit (not shown). The optic may have multiple lenses. The optical unit forms a subject image on the imaging element housed in the housing 1104 . The multiple lenses can be focused by adjusting their relative positions. This operation can also be performed automatically. An imaging device may be called a photoelectric conversion device. The photoelectric conversion device can include, as an imaging method, a method of detecting a difference from a previous image, a method of extracting from an image that is always recorded, and the like, instead of sequentially imaging.

FIG. 11B is a schematic diagram showing an example of the electronic device according to this embodiment. Electronic device 1200 includes display portion 1201 , operation portion 1202 , and housing 1203 . The housing 1203 may include a circuit, a printed board including the circuit, a battery, and a communication portion. The operation unit 1202 may be a button or a touch panel type reaction unit. The operation unit may be a biometric recognition unit that recognizes a fingerprint and performs unlocking or the like. An electronic device having a communication unit can also be called a communication device. The electronic device may further have a camera function by being provided with a lens and an imaging device. An image captured by the camera function is displayed on the display unit. Examples of electronic devices include smartphones, notebook computers, and the like.

FIGS. 12A and 12B are schematic diagrams showing an example of a display device using the display device 1 of this embodiment. FIG. 12A may be a display device such as a television monitor or a PC monitor. A display device 1300 has a frame 1301 and a display portion 1302 . The display device 1 according to this embodiment can be applied to the display unit 1302 . The display device 1300 has a base 1303 supporting a frame 1301 and a display section 1302 . The base 1303 is not limited to the form shown in FIG. 12(A). The lower side of the frame 1301 may also serve as the base. Also, the frame 1301 and the display portion 1302 may be curved. Its radius of curvature may be between 5000 mm and 6000 mm.

FIG. 12B is a schematic diagram showing another example of a display device using the display device 1 of the present disclosure. A display device 1310 in FIG. 12B is foldable and is a so-called foldable display device. A display device 1310 has a first display portion 1311 , a second display portion 1312 , a housing 1313 and a bending point 1314 . The display device 1 according to the embodiment can be applied to the first display portion 1311 and the second display portion 1312 . The first display portion 1311 and the second display portion 1312 may be a seamless display device. The first display portion 1311 and the second display portion 1312 can be separated at a bending point 1314 . The first display unit 1311 and the second display unit 1312 may display different images, or the first and second display units may display one image.

An application example of the display device 1 of each of the above-described embodiments to a further device will be described with reference to FIG. 13 . The display device 1 can be applied to systems that can be worn as wearable devices such as smart glasses, HMDs, and smart contacts. An imaging display device used in such an application includes an imaging device capable of photoelectrically converting visible light and a display device capable of emitting visible light.

Glasses 1600 (smart glasses) will be described as an example with reference to FIG. An imaging device 1602 such as a CMOS sensor or SPAD is provided on the surface side of lenses 1601 of spectacles 1600 . Further, the display device 1 of each embodiment described above is provided on the rear surface side of the lens 1601 . Glasses 1600 further comprise a controller 1603 . The control device 1603 functions as a power source that supplies power to the display device including the imaging device 1602 and the display device 1 according to each embodiment. Also, the control device 1603 controls operations of the imaging device 1602 and the display device 1 . The lens 1601 is formed with an optical system for condensing light onto the imaging device 1602 .

Another pair of glasses 1610 (smart glasses) will be described as an example with reference to FIG. 13B. The glasses 1610 have a control device 1612, and the control device 1612 is equipped with an imaging device corresponding to the imaging device 1602 and the display device 1 according to the present disclosure. An imaging device in the control device 1612 and an optical system for projecting display from the display device 1 are formed in the lens 1611 , and an image is projected onto the lens 1611 . The control device 1612 functions as a power source that supplies power to the imaging device and the display device 1 and controls operations of the imaging device and the display device 1 . The control device may have a line-of-sight detection unit that detects the line of sight of the wearer. Infrared rays may be used for line-of-sight detection. The infrared light emitting section emits infrared light to the eyeballs of the user who is gazing at the display image. A captured image of the eyeball is obtained by detecting reflected light of the emitted infrared light from the eyeball by an imaging unit having a light receiving element. At this time, deterioration of image quality can be reduced by providing a portion for reducing incidence of light from the infrared light emitting portion to the display portion in plan view.

The line of sight of the user with respect to the display image is detected from the captured image of the eye obtained by imaging the infrared light. Any method can be applied to line-of-sight detection using captured images of eyeballs. As an example, it is possible to use a line-of-sight detection method based on a Purkinje image obtained by reflection of irradiation light on the cornea. More specifically, line-of-sight detection processing based on the pupillary corneal reflection method is performed. The user's line of sight is detected by calculating a line of sight vector representing the orientation (rotational angle) of the eyeball based on the pupil image and the Purkinje image included in the captured image of the eyeball using the pupillary corneal reflection method. be.

A display device including the display device 1 of the present disclosure may include an imaging device having a light-receiving element, and may control a display image of the display device based on user's line-of-sight information from the imaging device. Specifically, the display device determines a first visual field area that the user gazes at and a second visual field area other than the first visual field area, based on the line-of-sight information. The first viewing area and the second viewing area may be determined by the control device of the display device, or may be determined by an external control device. In the display area of the display device, the display resolution of the first viewing area may be controlled to be higher than the display resolution of the second viewing area. That is, the resolution of the second viewing area may be lower than that of the first viewing area.

Further, the display area has a first display area and a second display area different from the first display area. is determined the region where is high. The first viewing area and the second viewing area may be determined by the control device of the display device, or may be determined by an external control device. The resolution of areas with high priority may be controlled to be higher than the resolution of areas other than areas with high priority. That is, the resolution of areas with relatively low priority may be lowered.

AI may be used to determine the first field of view area and the areas with high priority. The AI is a model configured to estimate the angle of the line of sight from the eyeball image and the distance to the object ahead of the line of sight, using the image of the eyeball and the direction in which the eyeball of the image was actually viewed as training data. It's okay. The AI program may be possessed by the display device, the imaging device, or the external device. If the external device has it, it is communicated to the display device via communication.

When display control is performed based on visual recognition detection, it can be applied to smart glasses that further have an imaging device that captures an image of the outside. Smart glasses can display captured external information in real time.

As described above, by using the device using the organic light-emitting element according to the present disclosure, it is possible to perform stable display with good image quality even for a long time.

The invention is not limited to the embodiments described above, and various modifications and variations are possible without departing from the spirit and scope of the invention. Accordingly, the claims are appended to make public the scope of the invention.

100... Pixel circuit 101... First column signal line 102... Second column signal line 103... First selection transistor 104... Second selection transistor 105... Second First scanning signal line 106 Second scanning signal line 107 Third scanning signal line 108 Fourth scanning signal line 109 Power supply line 110 Sub-pixel circuit 116...Common signal line 121...First holding capacitor 122...Second holding capacitor 123...Light emitting element 124...Drive transistor 125...Light emission control transistor 126.・・・Reset transistor

Claims (13)

a plurality of pixels arranged to form a plurality of rows and a plurality of columns; a plurality of first column signal lines for supplying signal voltages according to video data to the plurality of pixels; at least one second column signal line for supplying voltage, and
Each of the plurality of pixels includes a light emitting element, a driving transistor that drives the light emitting element, a first selection transistor that supplies the signal voltage from the first column signal line to a control electrode of the driving transistor, and the first a second selection transistor that supplies a reference voltage from a two-column signal line to the control electrode of the drive transistor;
the plurality of first column signal lines and the at least one second column signal line are arranged along the columns of the plurality of pixels;
The display device, wherein the at least one second column signal line is commonly connected to pixels in at least two columns among the plurality of pixels via the second selection transistor. The plurality of columns includes a first pixel column including first pixels and a second pixel column including second pixels, and one of the second column signal lines is connected to the first pixels and the 2. A display device according to claim 1, connected to a second pixel. The plurality of pixels are arranged in units of at least three pixels having different emission colors,
2. The display device according to claim 1, wherein said second column signal line is commonly connected to said at least three pixels included in said unit via said second selection transistor. 4. The display device according to claim 3, wherein the units are arranged in a stripe pattern, and two second column signal lines are arranged for each unit. The plurality of pixels includes a plurality of pixels having different emission colors,
2. The second column signal lines are provided corresponding to the luminescent colors, and are commonly connected to pixels having the same luminescent color via the second selection transistors. Display device as described. 6. The method of any one of claims 1 to 5, wherein the plurality of pixels includes dummy pixel regions arranged along columns, and the second column signal line is arranged in the dummy pixel regions. display device. 7. The display device according to any one of claims 1 to 6, wherein a shield wiring for shielding between pixels is arranged between adjacent pixels arranged along a row. 8. The display device according to claim 7, wherein the second column signal line also serves as the shield wiring. 9. The display device according to claim 8, wherein the width of the second column signal line is larger than the width of the first column signal line. The second column signal line is connected via the second selection transistor to a plurality of common signal lines arranged along rows, and the plurality of common signal lines are arranged in parallel with the first column signal line. 10. A display device according to any one of claims 1 to 9, characterized in that it is connected by a shunt signal line (620) connected to the display device. a period during which the first selection transistors of the pixels in a predetermined row supply the signal voltage from the first column signal line to the control electrodes of the drive transistors; and the second selection of the pixels in a row different from the predetermined row. 11. The display device according to any one of claims 1 to 10, wherein the period overlaps with the period during which the transistor supplies the reference voltage from the second column signal line to the control electrode of the drive transistor. An optical unit having a plurality of lenses, an imaging device that receives light that has passed through the optical unit, and a display unit that displays an image captured by the imaging device, wherein the display unit is according to claims 1 to 11. A photoelectric conversion device comprising the display device according to claim 1 . A display unit having the display device according to any one of claims 1 to 11, a housing provided with the display unit, and a communication unit provided in the housing and communicating with the outside. An electronic device characterized by:

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