Electronic device

Abstract

The present disclosure provides an electronic device. The electronic device has a first region and a second region, and the second region is adjacent to the first region. The electronic device includes a light sensor, a first light emitting element, and a second light emitting element. The light sensor is disposed in the first region and is configured to receive a light signal. The first light emitting element is disposed in the first region. The second light emitting element is disposed in the second region. The first light emitting element is driven by a first driving signal, and the first driving signal has a first duty cycle. The second light emitting element is driven by a second driving signal, and the second driving signal has a second duty cycle. The first duty cycle is less than the second duty cycle. Thus, the electronic device of the present disclosure can provide a better light sensing function.

Description

Technical Field

[0001] This disclosure relates to an apparatus, and more particularly to an electronic device with optical sensing capabilities. Background Technology

[0002] Currently, most smartphone image sensors are located in the display area of ​​the screen. Therefore, when the screen is displaying an image, if the image sensor is performing image sensing functions, in addition to receiving the light signal from the target being sensed, the image sensor will also receive the light signal emitted by the display pixels of the adjacent image sensor on the screen, which leads to a decrease in the image sensing quality of the image sensor. Summary of the Invention

[0003] This disclosure relates to an electronic device that provides superior optical sensing capabilities.

[0004] According to some embodiments of this disclosure, an electronic device has a first region and a second region, with the second region adjacent to the first region. The electronic device includes a light sensor, a first light-emitting element, and a second light-emitting element. The light sensor is disposed in the first region and is used to receive light signals. The first light-emitting element is disposed in the first region. The second light-emitting element is disposed in the second region. The first light-emitting element is driven by a first driving signal, and the first driving signal has a first duty cycle. The second light-emitting element is driven by a second driving signal, and the second driving signal has a second duty cycle. The first duty cycle has a first duty cycle. The second duty cycle has a second duty cycle. The first duty cycle is less than the second duty cycle.

[0005] Based on the above, the electronic device disclosed herein can drive the first light-emitting element in the first region and the second light-emitting element in the second region, which are located in the same region as the light sensor, respectively, through different driving signals, so that the light sensor can achieve better light sensing effect during the light sensing process.

[0006] To make the above-described features and advantages of this disclosure more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0007] Figure 1A These are circuit diagrams of electronic devices according to some embodiments of this disclosure;

[0008] Figure 1B This is a top view schematic diagram of an electronic device according to some embodiments of the present disclosure;

[0009] Figure 1C This is a top view schematic diagram of an electronic device according to some embodiments of the present disclosure;

[0010] Figure 1DThis is a top view schematic diagram of an electronic device according to some embodiments of the present disclosure;

[0011] Figure 2 This is a side cross-sectional schematic diagram of an electronic device according to some embodiments of the present disclosure;

[0012] Figure 3A These are signal waveform diagrams of drive signals according to some embodiments of this disclosure;

[0013] Figure 3B These are signal waveform diagrams of drive signal operation in sensing mode according to some embodiments of this disclosure;

[0014] Figure 3C These are signal waveform diagrams of drive signals according to some embodiments of this disclosure;

[0015] Figure 4A These are signal waveform diagrams of drive signal operation in sensing mode according to some embodiments of this disclosure;

[0016] Figure 4B These are signal waveform diagrams of drive signal operation in sensing mode according to some embodiments of this disclosure;

[0017] Figure 5 These are signal waveform diagrams of drive signal operation in sensing mode according to some embodiments of this disclosure;

[0018] Figure 6 This is an operation flowchart of an electronic device according to some embodiments of the present disclosure;

[0019] Figure 7 This is an operation flowchart of an electronic device according to some embodiments of the present disclosure;

[0020] Figure 8A This is an operation flowchart of the optical sensor and light-emitting element according to some embodiments of this disclosure;

[0021] Figure 8B This is a timing diagram showing the operation of an optical sensor and a light-emitting element according to some embodiments of this disclosure.

[0022] Explanation of reference numerals in the attached figures

[0023] 100: Electronic devices;

[0024] 110, 110A, 120, 120A: Light-emitting elements;

[0025] 130, 130A, 131B, 132B, 131C, 132C: Optical sensors;

[0026] 140: Drive circuit;

[0027] 150:Substrate;

[0028] 160: Structural layer;

[0029] 170: Components;

[0030] 200: Sensing target;

[0031] 201, L: Optical signal;

[0032] S1A, S2A, S1B, S2B, S1C, S2C, S3C: Areas;

[0033] D1, D2, D3: Direction;

[0034] DS1, DS2, DS3: Drive signals;

[0035] DV: Control signal;

[0036] t0~t12: Time;

[0037] P1, P2, P3: Working cycle;

[0038] w1, w2, w3: Driving time;

[0039] I1, I2, I3, V1, V2: driving amplitude;

[0040] L, L': light rays;

[0041] S610~S680, S710~S780, S810~S890: Steps. Detailed Implementation

[0042] Reference will now be made in detail to exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element references are used in the drawings and description to denote the same or similar parts.

[0043] Throughout this specification and the appended claims, certain terms are used to refer to specific elements. Those skilled in the art will understand that electronic device manufacturers may use different names to refer to the same components. This document is not intended to distinguish between components that function identically but have different names. In the following specification and claims, words such as "containing" and "comprising" are open-ended terms and should therefore be interpreted as meaning "containing but not limited to...".

[0044] The directional terms used herein, such as "up," "down," "front," "back," "left," and "right," are for reference only when referring to the accompanying drawings. Therefore, the directional terms used are illustrative and not intended to limit this disclosure. In the accompanying drawings, each figure illustrates general features of the methods, structures, and / or materials used in specific embodiments. However, these figures should not be construed as defining or limiting the scope or nature covered by these embodiments. For example, for clarity, the relative dimensions, thicknesses, and positions of various films, regions, and / or structures may be reduced or enlarged.

[0045] In some embodiments of this disclosure, terms such as "connection" and "interconnection," unless specifically defined, may refer to two structures in direct contact, or to two structures not in direct contact, with other structures disposed between them. Furthermore, these terms may include situations where both structures are movable or both are fixed. Additionally, the term "coupled" includes any direct or indirect electrical connection. In the case of a direct electrical connection, the endpoints of components on two circuits are directly connected or interconnected by a conductor segment. In the case of an indirect electrical connection, the endpoints of components on two circuits are connected by a switch, diode, capacitor, inductor, resistor, other suitable components, or combinations thereof, but are not limited thereto.

[0046] The terms “approximately,” “equal to,” “same,” “substantially,” or “roughly” are generally interpreted as being within 20% of a given value or range, or as being within 10%, 5%, 3%, 2%, 1%, or 0.5% of a given value or range.

[0047] The ordinal numbers used in the specification and claims, such as "first," "second," etc., to modify elements, do not in themselves imply or represent any prior ordinal number for that or those components, nor do they represent the order of one element with another, or the order of manufacturing methods. The use of these ordinal numbers is solely to clearly distinguish one named element from another element with the same name. The claims and specification may not use the same terminology; therefore, a first component in the specification may be a second component in the claims. It should be understood that the following embodiments can be implemented by substituting, recombining, or mixing technical features from several different embodiments without departing from the spirit of this disclosure to complete other embodiments.

[0048] It should be understood that the features described below can be replaced, recombined, or mixed in several different embodiments to complete other embodiments without departing from the spirit of this disclosure. Features between embodiments can be arbitrarily mixed and combined as long as they do not violate the spirit of the invention or conflict with it.

[0049] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It is understood that such terms, for example, as defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the relevant art and the background or context of this disclosure, and should not be interpreted in an idealized or overly formal manner, unless specifically defined in embodiments of this disclosure.

[0050] The electronic device disclosed herein may include, for example, a display device, an antenna device, a sensing device, a touch display, a curved display, or a free-shape display, and may also be a bendable or flexible splicing electronic device, but is not limited thereto. The sensing device may include sensors, such as light sensors, capacitive sensors, pressure sensors, electromagnetic sensors, other suitable sensors, or combinations of the above types of sensors. Sensors may include biosensors, touch sensors, fingerprint sensors, eye-tracking sensors, image sensors, other suitable sensors, or combinations of the above types of sensors. The electronic device may include electronic components, wherein electronic components may include passive and active components, such as capacitors, resistors, inductors, diodes, transistors, sensors, etc. The electronic device may include, for example, light-emitting diodes (LEDs), liquid crystals, fluorescent, phosphorescent, quantum dots (QDs), other suitable display media, or combinations thereof, but is not limited thereto. Diodes may include light-emitting diodes or photodiodes. The light-emitting diode (LED) may include, for example, an organic light-emitting diode (OLED) or an inorganic light-emitting diode. Inorganic LEDs may include, for example, mini LEDs, micro LEDs, or quantum dot LEDs (e.g., QLEDs, QDLEDs), or other suitable materials or any combination thereof, but are not limited thereto. The antenna device may be, for example, a liquid crystal antenna, but is not limited thereto. It should be noted that the electronic device of this disclosure may be any combination of the foregoing, but is not limited thereto. Furthermore, the electronic device may be rectangular, circular, polygonal, have curved edges, or other suitable shapes. The electronic device may have a driving system, a control system, a light source system, a shelving system, and other such peripheral systems to support the display device or antenna device.

[0051] Figure 1A This is a circuit diagram of an electronic device according to some embodiments of the present disclosure. (See reference...) Figure 1A The electronic device 100 includes a first light-emitting element 110, a second light-emitting element 120, and a light sensor 130. The first light-emitting element 110, the second light-emitting element 120, and the light sensor 130 are respectively coupled to and driven by a driving circuit 140. In this embodiment, the first light-emitting element 110 is driven by a first driving signal DS1, and the first driving signal DS1 is provided by the driving circuit 140. The second light-emitting element 120 is driven by a second driving signal DS2, and the second driving signal DS2 is provided by the driving circuit 140. The light sensor 130 can be controlled by a control signal DV, and the control signal DV is provided by the driving circuit 140. The light sensor 130 can provide the sensing result to the driving circuit 140.

[0052] In this embodiment, the electronic device 100 may also include, for example, a substrate, a display element, a touch element, and / or other sensing elements, and is not limited to these. Figure 1A As shown. Electronic device 100 may be, for example, a mobile device, such as a smartphone, tablet or laptop, or a similar device with light emission and light sensing functions, but this disclosure is not limited thereto.

[0053] In this embodiment, when the electronic device 100 is, for example, a display device, the first light-emitting element 110 and the second light-emitting element 120 may be, for example, display elements of the display device or light-emitting elements of the backlight module in the display device. Therefore, the driving circuit 140 may include, for example, a display driver or a backlight driver. The first light-emitting element 110 and the second light-emitting element 120 may be organic light-emitting diodes or inorganic light-emitting diodes, but this disclosure is not limited thereto. In this embodiment, the light sensor may be configured to include, for example, at least one of a fingerprint sensing element, an image sensing element, or an eye-tracking element (i.e., an infrared light sensing element). Therefore, the driving circuit 140 may also include, for example, a fingerprint sensing driver, an image sensing driver, or an eye-tracking driver. Furthermore, the aforementioned drivers may be multiple different chips or integrated into a single chip in the driving circuit 140. In one embodiment, the driving circuit 140 may also be the central processing unit (CPU) of the electronic device 100.

[0054] Figure 1B This is a top view schematic diagram of an electronic device according to some embodiments of the present disclosure. (Reference) Figure 1BWhen the electronic device is, for example, a display device, it may include a display panel 100A. The display surface of the display panel 100A may be parallel to the plane formed by extending along a first direction D1 and a second direction D2, and provide display light toward a third direction D3. The directions of the first direction D1, the second direction D2, and the third direction D3 are different from each other; in one embodiment, the first direction D1, the second direction D2, and the third direction D3 are perpendicular to each other. In this embodiment, the display panel 100A includes a first region S1A and a second region S2A. The second region S2A is adjacent to the first region S1A. Figure 1A The first light-emitting element 110 can be disposed in the first region S1A, and Figure 1A The second light-emitting element 120 can be disposed in the second region S2A. The light sensor 130A can be disposed in the first region S1A of the display panel 100A; therefore, the first region S1A can also be a sensing region. The light sensor 130A can receive light signals, for example, light signals from a third direction D3, to perform light sensing operations. It should be noted that this disclosure does not limit the shape of the first region S1A and the second region S2A, and the first region S1A can also include multiple identical or different light sensors. Figure 1B Only one implementation example is presented for illustrative purposes.

[0055] In this embodiment, when the light sensor 130A performs light sensing, the first light-emitting element disposed in the first region S1A and the second light-emitting element disposed in the second region S2A can be driven by different driving signals to achieve different light emission or display effects, and to enable the light sensor 130A to achieve better light sensing effect. In this embodiment, the light sensing function may include image sensing function, but this disclosure is not limited thereto.

[0056] Figure 1C This is a top view schematic diagram of an electronic device according to some embodiments of the present disclosure. (Reference) Figure 1C When the electronic device is, for example, a display device, it may include a display panel 100B. The display panel 100B includes a first region S1B and a second region S2B. The second region S2B is adjacent to the first region S1B. Unlike... Figure 1B The first region S1B can be equipped with multiple sensors, such as light sensor 131B and light sensor 132B. Therefore, the first region S1B can also be a sensing region. Figure 1A The first light-emitting element 110 can be disposed in the first region S1B, and Figure 1A The second light-emitting element 120 may be disposed in the second region S2B.

[0057] In this embodiment, when at least one of the light sensor 131B and the light sensor 132B is performing light sensing function, the first light-emitting element 110 disposed in the first region S1B and the second light-emitting element 120 disposed in the second region S2B can be driven by different driving signals to achieve different light-emitting or display effects, and at least one of the light sensor 131B and the light sensor 132B can achieve better light sensing effect.

[0058] Figure 1D This is a top view schematic diagram of an electronic device according to some embodiments of the present disclosure. (Reference) Figure 1D When the electronic device is, for example, a display device, the electronic device may include a display panel 100C. Unlike... Figure 1B The display panel 100C includes a first region S1C, a second region S2C, and a third region S3C. The first region S1C, the second region S2C, and the third region S3C are adjacent to each other. The first region S1C may be provided with a first light-emitting element 110, and the second region S2C may be provided with a second light-emitting element 120. Figure 1A The electronic device 100 may also include a third light-emitting element (not shown) and may be disposed in the third region S3C. The first region S1C may also be provided with a light sensor 131C. The second region S2C may also be provided with a light sensor 132C.

[0059] In this embodiment, when at least one of the light sensor 131C and the light sensor 132C is performing light sensing function, the first light-emitting element 110 disposed in the first region S1C, the second light-emitting element 120 disposed in the second region S2C, and the third light-emitting element disposed in the third region S3C can be driven by different driving signals to achieve different light-emitting or display effects, and at least one of the light sensor 131C and the light sensor 132C can achieve better light sensing effect.

[0060] Figure 2 This is a side cross-sectional schematic diagram of an electronic device according to some embodiments of the present disclosure. Reference Figure 2 This embodiment may be, for example, Figure 1BThe electronic device of this embodiment corresponds to the cross-sectional view at the dashed line position A-A'. In this embodiment, the electronic device includes a substrate 150, a structural layer 160 may be disposed above the substrate 150, and the substrate 150 and the structural layer 160 may form a display panel 100A (or a touch display panel). In this embodiment, the light sensor 130A may be, for example, an under-display sensor, but this disclosure is not limited thereto. The light sensor 130A may be disposed below the substrate 150 of the electronic device, and a plurality of first light-emitting elements 110A and a plurality of second light-emitting elements 120A may be disposed above the substrate 150. In this embodiment, the structural layer 160 may also include a plurality of elements 170, wherein the plurality of elements 170 may be, for example, pixel elements, wiring layers, or other elements.

[0061] However, in one embodiment, the light sensor 130A may also be an in-screen sensor, and may be disposed in the structural layer 160 such that the light sensor 130A, the first light-emitting element 110A and a plurality of second light-emitting elements 120A are disposed on the same side of the substrate 150.

[0062] In this embodiment, when the optical sensor 130A is performing optical sensing, it can receive optical signals 201 from the sensing target 200. Since the optical signals L emitted by the plurality of first light-emitting elements 110A in the first region S1A may be reflected or scattered by element 170 to generate light L' that is incident on the optical sensor 130A, thus affecting the sensing result of the optical sensor 130A, the plurality of first light-emitting elements 110A disposed in the first region S1A and the plurality of second light-emitting elements 120A disposed in the second region S2A can be driven by different driving signals, thereby reducing the probability that the optical sensor 130A receives light generated by reflection or scattering of the optical signals emitted by the plurality of first light-emitting elements 110A in the first region S1A. In this way, when the optical sensor 130A is performing optical sensing, the influence of light generated by reflection or scattering of the optical signals emitted by the plurality of first light-emitting elements 110A in the first region S1A can be reduced, thereby achieving a better optical sensing effect.

[0063] In addition, it has the following characteristics as described above. Figure 1C or Figure 1D The structural features of the electronic devices in display panels 100B and 100C can also be derived from... Figure 2 The cross-sectional structure shown can be used as a reference. Furthermore, the driving methods for the light-emitting elements and the light sensor will be described in detail by the following embodiments.

[0064] Figure 3A These are signal waveform diagrams of drive signals according to some embodiments of this disclosure. (See reference...) Figure 1A , Figure 1B as well as Figure 3AIn this embodiment, the electronic device 100 can operate in a normal mode and a sensing mode. The normal mode refers to the display panel 100A providing display functionality, and the light sensor 130A being inactive (or disabled). The sensing mode refers to the display panel 100A providing display functionality, and the light sensor 130A simultaneously providing light sensing functionality. For example... Figure 3A As shown, the first light-emitting element 110 and the second light-emitting element 120 can respectively receive the first driving signal DS1 (e.g., a current signal) and the second driving signal DS2 (e.g., a current signal).

[0065] The first driving signal DS1 has a first duty cycle P1, and the second driving signal DS2 has a second duty cycle P2. The duty cycle includes a duration representing the turn-on of the light-emitting element and a duration representing the turn-off of the light-emitting element. During the period from time t0 to time t4, when the electronic device 100 operates in normal mode, the first duty cycle P1 may be equal to the second duty cycle P2. In other words, the first driving signal DS1 and the second driving signal DS2 may have the same refresh rate. The refresh rate refers to the frequency at which the first driving signal DS1 and the second driving signal DS2 drive the first light-emitting element and the second light-emitting element to emit light per second, respectively, and can be calculated from the number of duty cycles per second. In this embodiment, when the electronic device 100 operates in normal mode, the first driving signal DS1 and the second driving signal DS2 may have the same driving time w2 (or pulse width) and the same driving amplitude I2 within the same duty cycle. In this way, the first light-emitting element 110 and the second light-emitting element 120 can provide the same light emission or display effect.

[0066] During the period from time t4 to time t8, when the electronic device 100 operates in sensing mode, the first drive signal DS1 and the second drive signal DS2 may have the same duty cycle (i.e., the same update rate), but different drive amplitudes and / or drive times. When the electronic device 100 operates in sensing mode, the first drive signal DS1 has a first duty cycle P1, and the first duty cycle P1 has a first duty ratio. The second drive signal DS2 has a second duty cycle P2, and the second duty cycle P2 has a second duty ratio. Both the first duty cycle P1 and the second duty cycle P2 correspond to a frame period. The duty cycle refers to the ratio of the duration of a turn-on light-emitting element to the total time of a duty cycle. In this embodiment, the first drive signal DS1 has a drive time w1 and a drive amplitude I1 in the first duty cycle P1, and the second drive signal DS2 has a drive time w2 and a drive amplitude I2 in the second duty cycle P2. It should be noted that the driving time w1 is less than the driving time w2, while the driving amplitude I1 can be greater than or equal to the driving amplitude I2. Therefore, when the first working cycle P1 and the second working cycle P2 have the same duration, the first duty cycle of the first working cycle P1 is less than the second duty cycle of the second working cycle P2.

[0067] First, it should be noted that, taking the first light-emitting element 110 and the second light-emitting element 120 as light-emitting diodes as examples, the relationship between the current used to drive the light-emitting diode and the brightness of the light-emitting diode is a non-linear relationship. Furthermore, the brightness of the first light-emitting element 110 and the second light-emitting element 120 can be finely adjusted by adjusting at least one of the pulse width (i.e., the driving time described in the embodiments of this disclosure) and the pulse height (i.e., the driving amplitude described in the embodiments of this disclosure) of the current used to drive the light-emitting diode.

[0068] Therefore, when the electronic device 100 operates in sensing mode, since the first duty cycle P1 of the first driving signal DS1 is less than the second duty cycle P2 of the second driving signal DS2, the time affected by the light emitted by the first light-emitting element 110 during the sensing process can be shortened. Furthermore, although the first duty cycle P1 is less than the second duty cycle P2, since the driving amplitude I1 can be greater than or equal to the driving amplitude I2, when the electronic device 100 operates in sensing mode, the first light-emitting element 110 and the second light-emitting element 120 can still achieve similar grayscale brightness, thus enabling the overall display to achieve similar display effects in both normal mode and sensing mode.

[0069] In this embodiment, the driving amplitude I1, driving amplitude I2, driving time w1, and driving time w2 can satisfy the condition of the following equation (1). In this regard, the ratio of the product of driving time w1 and driving amplitude I1 to the product of driving time w2 and driving amplitude I2 is greater than or equal to 0.5 and less than or equal to 2.

[0070] 0.5≤(w1*I1) / (w2*I2)≤2…………Equation (1)

[0071] In one embodiment, the driving amplitude I1, driving amplitude I2, driving time w1, and driving time w2 may also satisfy the condition of equation (2) below. In this regard, the ratio of the product of driving time w1 and driving amplitude I1 to the product of driving time w2 and driving amplitude I2 is greater than or equal to 1 and less than or equal to 1.2.

[0072] 1≤(w1*I1) / (w2*I2)≤1.2…………Equation (2)

[0073] Furthermore, the signal waveform of the drive signal in this embodiment can also be applied to... Figure 1C The display panel 100B in this embodiment.

[0074] Figure 3B These are signal waveform diagrams showing the operation of drive signals in sensing mode according to some embodiments of this disclosure. (See reference...) Figure 1A , Figure 1B as well as Figure 3B In this embodiment, when the electronic device 100 operates in sensing mode, the first light-emitting element 110 and the second light-emitting element 120 can respectively receive the first driving signal DS1 (current signal) and the second driving signal DS2 (current signal). Unlike... Figure 3A In this embodiment, the first drive signal DS1 and the second drive signal DS2 may have different working cycles (i.e. different update rates) and different drive amplitudes.

[0075] Specifically, during the period from time t0 to time t6, the electronic device 100 operates in sensing mode. The first operating period P1 of the first driving signal DS1 can be the period from time t0 to time t1, and the second operating period P2 of the second driving signal DS2 can be the period from time t0 to time t2. It should be noted that the first operating period P1 of the first driving signal DS1 is shorter than the second operating period P2 of the second driving signal DS2 (i.e., the update rate of the first driving signal DS1 is greater than the update rate of the second driving signal DS2). In this embodiment, the first driving signal DS1 has a driving time w1 and a driving amplitude I1 in the first operating period P1, and the second driving signal DS2 has a driving time w2 and a driving amplitude I2 in the second operating period P2. The driving time w1 is shorter than the driving time w2, and the driving amplitude I1 is greater than the driving amplitude I2. Therefore, the time affected by the light emitted by the first light-emitting element 110 after reflection or scattering during the sensing process can be shortened, resulting in a better light sensing effect. Furthermore, the first light-emitting element 110 and the second light-emitting element 120 can still achieve similar grayscale brightness, so that the overall display screen can achieve similar display effects in the sensing mode.

[0076] In one embodiment, when the electronic device 100 operates in sensing mode, the number of pulses n1 of the first drive signal DS1 and the number of pulses n2 of the second drive signal DS2 within a fixed time period can also satisfy the condition of the following equation (3). For example, Figure 3B As shown, during the period from time t0 to time t6, the number of pulses of the first driving signal DS1 is 6 (n1 = 6), and the number of pulses of the second driving signal DS2 is 3 (n2 = 3). Furthermore, the driving amplitude I1, driving amplitude I2, driving time w1, driving time w2, number of pulses n1, and number of pulses n2 can also satisfy the conditions of the following equation (4).

[0077] n1≥2*n2…………Equation (3)

[0078] 1≤(w1*I1*n1) / (w2*I2*n2)…………Equation (4)

[0079] Furthermore, the signal waveform of the drive signal in this embodiment can also be applied to... Figure 1C The display panel 100B in this embodiment.

[0080] Figure 3C These are signal waveform diagrams of drive signals according to some embodiments of this disclosure. (See reference...) Figure 1A , Figure 1B as well as Figure 3CIn this embodiment, the first light-emitting element 110 can receive a first driving signal DS1 (current signal). When the electronic device 100 operates in normal mode, the first driving signal DS1 may have a first operating cycle P1 during the period from time t0 to time t4. When the electronic device 100 operates in sensing mode, the first driving signal DS1 may also have a first operating cycle P1 during the period from time t4 to time t8. However, it should be noted that, unlike... Figure 3A In this embodiment, the driving time of the first driving signal DS1 during the period from time t4 to time t6 can be adjusted to be shortened, thereby reducing the duty cycle. Furthermore, the driving amplitude of the first driving signal DS1 during the period from time t4 to time t6 can be adjusted to be increased. However, in the next operating cycle, the driving time and driving amplitude of the first driving signal DS1 during the period from time t6 to time t8 can be restored to the result as in the normal mode. In other words, when the electronic device 100 operates in sensing mode, the driving time and driving amplitude of the first driving signal DS1 received by the first light-emitting element 110 in at least one operating cycle can be adjusted. This shortens the time that the light sensor 130A is affected by the light signal emitted by the first light-emitting element 110 after reflection or scattering during the sensing process, resulting in better light sensing performance. Furthermore, the first light-emitting element 110 and the second light-emitting element 120 can still achieve similar grayscale brightness, allowing the overall display screen to achieve similar display effects in sensing mode.

[0081] In one embodiment, when the electronic device 100 operates in sensing mode, the first driving signal DS1 received by the first light-emitting element 110 can be adjusted to have three or more different driving times and / or three or more different driving amplitudes in at least a portion of multiple operating cycles, and is not limited to... Figure 3C .

[0082] Furthermore, the signal waveform of the drive signal in this embodiment can also be applied to... Figure 1C The display panel 100B in this embodiment.

[0083] Figure 4A These are signal waveform diagrams showing the operation of drive signals in sensing mode according to some embodiments of this disclosure. (See reference...) Figure 1A , Figure 1B as well as Figure 4AIn this embodiment, when the electronic device 100 operates in sensing mode, the first light-emitting element 110 can receive a first driving signal DS1 (current signal). During the period from time t0 to time t2, the first driving signal DS1 may have a first operating cycle P1 and a driving amplitude I1 (current amplitude). During the period from time t0 to time t2, the driving circuit 140 may simultaneously provide a control signal DV (e.g., a voltage signal) to the photosensor 130 to operate the photosensor 130 to perform photosensing operation. The control signal DV may, for example, have a driving amplitude V1 (voltage amplitude). In this embodiment, the photosensor 130 can continuously perform photosensing throughout the entire period corresponding to the first operating cycle P1 of the first driving signal DS1.

[0084] Furthermore, the signal waveform of the drive signal in this embodiment can also be applied to... Figure 1C The display panel 100B in this embodiment.

[0085] Figure 4B These are signal waveform diagrams showing the operation of drive signals in sensing mode according to some embodiments of this disclosure. (See reference...) Figure 1A , Figure 1B as well as Figure 4B In this embodiment, when the electronic device 100 operates in sensing mode, the first light-emitting element 110 can receive a first driving signal DS1 (current signal). During the period from time t0 to time t2, the first driving signal DS1 may have a first operating cycle P1 and a driving amplitude I1 (current amplitude). During the period from time t0 to time t2, the driving circuit 140 may simultaneously provide a control signal DV (e.g., a voltage signal) to the photosensor 130 to operate the photosensor 130 for photosensing operation. The control signal DV may, for example, have a driving amplitude V2 (voltage amplitude). In this embodiment, the photosensor 130 may only perform photosensing operation during the disabled period (time t1 to time t2) corresponding to the first operating cycle P1 of the first driving signal DS1. Figure 4B As shown, during the period from time t0 to time t1, the first driving signal DS1 drives the first light-emitting element 110 to emit light or display, and the driving amplitude of the control signal DV is 0. Then, during the period from time t1 to time t2, the first driving signal DS1 switches to a driving amplitude of 0, and does not drive the first light-emitting element 110 (i.e., the disabled period), and the control signal DV switches to a driving amplitude of V2, driving the light sensor 130 to perform light sensing operation. In other words, the light sensor 130 can perform light sensing operation during the period when the first light-emitting element 110 is not emitting light or displaying, thereby reducing the probability of receiving light emitted by the light-emitting element after reflection or scattering during the light sensing process.

[0086] Furthermore, the signal waveform of the drive signal in this embodiment can also be applied to... Figure 1C The display panel 100B in this embodiment.

[0087] Figure 5 These are signal waveform diagrams showing the operation of drive signals in sensing mode according to some embodiments of this disclosure. (See reference...) Figure 1A , Figure 1D as well as Figure 5 In this embodiment, the electronic device 100 may further include a third light-emitting element (not shown). When the electronic device 100 operates in sensing mode, the first light-emitting element 110, the second light-emitting element 120, and the third light-emitting element may respectively receive a first driving signal DS1 (current signal), a second driving signal DS2 (current signal), and a third driving signal DS3 (current signal). In this embodiment, the first driving signal DS1, the second driving signal DS2, and the third driving signal DS3 may have the same operating cycle but different driving amplitudes.

[0088] Specifically, during the period from time t0 to time t1, the first drive signal DS1 has a first working period P1, and the first working period P1 has a first duty cycle. The second drive signal DS2 has a second working period P2, and the second working period P2 has a second duty cycle. The third drive signal DS3 has a third working period P3, and the third working period P3 has a third duty cycle. The first working period P1, the second working period P2, and the third working period P3 each correspond to a frame period. In this embodiment, the first drive signal DS1 has a drive time w1 and a drive amplitude I1 in the first working period P1. The second drive signal DS2 has a drive time w2 and a drive amplitude I2 in the second working period P2. The third drive signal DS3 has a drive time w3 and a drive amplitude I3 in the third working period P3.

[0089] In this embodiment, the light sensor 131C may be, for example, a light sensing element (e.g., a visible light sensing element), and the light sensor 132C may be, for example, an eye-tracking element (e.g., an infrared light sensing element). In this regard, the infrared light sensing element is less affected by the visible light signal emitted by the light-emitting element of the display panel 100C (sensing signals of different light bands), while the light sensing element is more affected by the light generated by reflection or scattering of the visible light signal emitted by the light-emitting element of the display panel 100C. Therefore, the driving time w1 can be the shortest, and the driving time w2 is the next shortest. It should be noted that the driving time w1 is less than the driving time w2, and the driving time w2 is less than or equal to the driving time w3. The driving amplitude I1 is greater than the driving amplitude I2, and the driving amplitude I2 is greater than or equal to the driving amplitude I3. Therefore, the time during which the optical sensors 131C and 132C are affected by the light emitted from the first light-emitting element 110 and the second light-emitting element 120 after reflection or scattering can be shortened, thus achieving better optical sensing performance. In this way, the first duty cycle of the first working cycle P1 is less than the second duty cycle of the second working cycle P2, and the second duty cycle of the second working cycle P2 is less than or equal to the third duty cycle of the third working cycle P3.

[0090] Furthermore, although the first duty cycle of the first working cycle P1 is less than the second duty cycle of the second working cycle P2, and the second duty cycle of the second working cycle P2 is less than or equal to the third duty cycle of the third working cycle P3, since the driving amplitude I1 is greater than the driving amplitude I2, and the driving amplitude I2 is greater than or equal to the driving amplitude I3, when the electronic device 100 operates in sensing mode, the first light-emitting element 110, the second light-emitting element 120, and the third light-emitting element can still provide similar grayscale brightness, so that the overall display screen can achieve similar display effects in sensing mode.

[0091] Figure 6 This is an operation flowchart of an electronic device according to some embodiments of this disclosure. (See also...) Figure 1A as well as Figure 6The electronic device 100 can execute the following steps S610 to S680. In step S610, the electronic device 100 enters a sensing mode. In step S620, the driving mode of the light-emitting element (i.e., the first light-emitting element 110 in the first area mentioned above) in the sensing area is adjusted. Simultaneously, in step S630, the light sensor 130 is driven synchronously. In step S640, the light sensor 130 processes the light signal to convert it into pattern data and provides it to the processing unit. In this embodiment, the processing unit may refer to the driving circuit 140, or other processing units besides the driving circuit 140. In step S650, the processing unit provides instructions to the display panel of the electronic device 100 to update the displayed pattern and display the pattern acquired and processed by the light sensor 130. In step S660, the processing unit determines whether a photo or video recording instruction has been received through the touch unit of the electronic device 100. If not, steps S630 to S650 are re-executed to continuously update the pattern displayed on the display panel. If so, in step S670, the light sensor 130 receives the light signal and processes it to convert it into final pattern data. In step S680, the light sensor 130 provides the final pattern data to the processing unit. The display panel of the electronic device 100 can display the final pattern as the acquired pattern. It should be noted that steps S670 and S680 are optional. In one embodiment, when the processing unit receives a photo or video recording command, it uses the currently last displayed pattern as the acquired pattern. Therefore, in the sensing mode, the electronic device 100 of this embodiment can simultaneously adjust the light-emitting element of the sensing area and drive the light sensor 130.

[0092] Figure 7 This is an operation flowchart of an electronic device according to some embodiments of this disclosure. (See also...) Figure 1A as well as Figure 7The electronic device 100 can execute the following steps S710 to S780. In step S710, the electronic device 100 enters a sensing mode. In step S720, the driving mode of the light-emitting element (i.e., the first light-emitting element 110 in the first area mentioned above) in the sensing area is adjusted. In step S730, the light sensor 130 is driven. In step S740, the light sensor 130 processes the light signal to convert it into pattern data and provides it to the processing unit. In this embodiment, the processing unit may refer to the driving circuit 140, or other processing units besides the driving circuit 140. In step S750, the processing unit provides instructions to the display panel of the electronic device 100 to update the displayed pattern and display the pattern acquired and processed by the light sensor 130. In step S760, the processing unit determines whether a photo or video recording instruction has been received through the touch unit of the electronic device 100. If not, steps S730 to S750 are re-executed to continuously update the pattern displayed on the display panel. If so, in step S770, the light sensor 130 receives the light signal and processes it to convert it into final pattern data. In step S780, the light sensor 130 provides the final pattern data to the processing unit. The display panel of the electronic device 100 can display the final pattern as the acquired pattern. It should be noted that steps S770 and S780 are optional. In one embodiment, after the processing unit receives a photo or video recording command, it uses the currently last displayed pattern as the acquired pattern. Therefore, in the sensing mode of this embodiment, the electronic device 100 can first adjust the light-emitting element of the sensing area and then drive the light sensor 130.

[0093] Figure 8A This is an operation flowchart of the optical sensor and light-emitting element according to some embodiments of the present disclosure. Figure 8B This is a timing diagram showing the operation of a light sensor and a light-emitting element according to some embodiments of this disclosure. (See reference) Figure 1A , Figure 8A as well as Figure 8B The electronic device 100 can perform the following steps S810 to S890, and the following operating timing of the light sensor 130 and the light-emitting element 110 are matched. Figure 8B Explanation. First, it should be noted that the sensing modes disclosed herein may include, for example: Figure 8B The preview and sensing operations shown are as follows: Figure 8B The waveform shown indicates that a high level signifies operation of the light-emitting element and / or the light sensor, while a low level signifies no operation of the light-emitting element and / or the light sensor. Furthermore, Figure 8B The period from time t0 to time t3 is one frame period, and similarly, the periods from time t3 to time t6, time t6 to time t9, and time t9 to time t12 are three different frame periods.

[0094] In step S810, the electronic device 100 enters sensing mode and can perform a preview operation. In step S820, the light-emitting element in the sensing area is driven by a pulse-width modulated signal. Therefore, during the period from time t0 to time t1, the first light-emitting element 110 can be driven to emit light or display. In step S830, during the period from time t1 to time t2, the light sensor 130 performs a reset operation. In step S840, during the period from time t2 to time t3, the light sensor 130 performs a sampling operation. Therefore, the electronic device 100 can display the current sampled pattern.

[0095] In step S850, the electronic device 100 determines whether it has received a photo or video recording command to perform a sensing operation. If the electronic device 100 has not yet received a photo or video recording command, it still performs a preview operation and re-executes steps S820 to S840. During the period from time t3 to time t6, the first light-emitting element 110 and the light sensor 130 repeatedly perform the relevant operations as during the period from time t0 to time t3, and the electronic device 100 continuously updates and displays the current sampling pattern.

[0096] Next, when the electronic device 100 receives a photo or video recording command, it performs a sensing operation. In step S860, a pulse-width modulated signal drives the light-emitting element in the sensing area. During the period from time t6 to time t7, the first light-emitting element 110 can be driven to emit light or display. In step S870, during the period from time t7 to time t8, the light sensor 130 can first perform a reset operation. In step S880, during the period from time t8 to time t9, the light sensor 130 performs a sampling operation. In step S890, the light sensor 130 outputs pattern data to the processing unit. Therefore, the electronic device 100 can update the display of the current sampled pattern and store the pattern data.

[0097] Next, the electronic device 100 can re-execute the preview operation. For this purpose, during the period from time t9 to time t12, the first light-emitting element 110 and the light sensor 130 repeatedly perform the relevant operations as from time t0 to time t3, and the electronic device 100 continuously updates the display of the current sampling pattern. Alternatively, in one embodiment, the electronic device 100 can end the sensing mode after time t9.

[0098] In summary, the electronic device of this disclosure can reduce the influence of light reflected or scattered by the light signal emitted by nearby light-emitting elements on the light sensor in sensing mode, thereby achieving better light sensing effect. Furthermore, after pulse width modulation of the driving signal used to drive the light-emitting elements, the overall display screen of the electronic device of this disclosure can present a similar display effect in both normal mode and sensing mode.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. An electronic device, characterized in that, The electronic device comprises: a first region and a second region, wherein the second region is adjacent to the first region. A light sensor is disposed in the first area and is used to receive light signals; A first light-emitting element is disposed in the first region; and The second light-emitting element is disposed in the second region. The first light-emitting element is driven by a first driving signal, and the first driving signal has a first operating cycle. The second light-emitting element is driven by a second driving signal, and the second driving signal has a second operating cycle. The first working cycle has a first duty cycle, the second working cycle has a second duty cycle, and the first duty cycle is less than the second duty cycle.

2. The electronic device according to claim 1, characterized in that, The first working cycle has a first driving time and a first driving amplitude, and the second working cycle has a second driving time and a second driving amplitude. The ratio of the product of the first driving time and the first driving amplitude to the product of the second driving time and the second driving amplitude is greater than or equal to 0.5 and less than or equal to 2.

3. The electronic device according to claim 2, characterized in that, The ratio is greater than or equal to 1 and less than or equal to 1.

2.

4. The electronic device according to claim 2, characterized in that, The first driving time is shorter than the second driving time.

5. The electronic device according to claim 2, characterized in that, The first driving amplitude is greater than the second driving amplitude.

6. The electronic device according to claim 1, characterized in that, Also includes: A substrate, wherein the light sensor and the first light-emitting element are disposed on the same side of the substrate.

7. The electronic device according to claim 1, characterized in that, Also includes: A substrate, wherein the light sensor is disposed below the substrate and the first light-emitting element is disposed above the substrate.

8. The electronic device according to claim 1, characterized in that, The optical sensor is configured as a fingerprint sensing element.

9. The electronic device according to claim 1, characterized in that, The optical sensor is configured as an image sensing element.

10. The electronic device according to claim 1, characterized in that, The optical sensor is configured as an eye-tracking element.

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