TWI772048B - Optical knob device - Google Patents

Abstract

An optical knob device includes: a housing, a reflector, a display panel and at least one light sensor. The housing has an opening. The reflector is disposed on an inner surface of the housing. The display panel is disposed inside the housing, exposed from the opening and including a plurality of lighting elements. The light sensor is used to sense light emitted by a first lighting element of the plurality of lighting elements and reflected by the reflector.

Description

Optical Knob Device

The present invention relates to a knob device, and in particular to an optical knob device.

With the trend of digital home appliances, knobs with display functions have appeared on the market. However, these knobs still use traditional brush connection members or Hall elements to determine the rotation angle (or rotation position). Currently, there is no knob integrated with display elements to determine the rotation angle.

The invention provides an optical knob device, which can integrate a display element to determine a rotation angle.

An embodiment of the present invention provides an optical knob device, including: a housing having an opening; a reflector disposed on an inner surface of the housing; a display panel located inside the housing, exposed from the opening and including a plurality of light-emitting elements; and At least one photosensitive element is used for sensing the light emitted by the first light-emitting element among the plurality of light-emitting elements and reflected by the reflector.

In an embodiment of the present invention, the number of the above-mentioned photosensitive elements is one, and the number of the first light-emitting elements is one.

In an embodiment of the present invention, the above-mentioned reflector has a width or reflectivity that changes along its length.

In an embodiment of the present invention, the above-mentioned casing includes a lower plate and a frame, the frame is connected to the periphery of the lower plate, and the reflector is located on the lower plate or the frame.

In an embodiment of the present invention, the above-mentioned housing further includes an upper plate, the periphery of the upper plate is connected to the frame, the opening is located in the upper plate, and the reflector is located on the upper plate, the lower plate or the frame.

In an embodiment of the present invention, the above-mentioned photosensitive element has a photosensitive surface area or photosensitive capability that changes along the frame.

In an embodiment of the present invention, the above-mentioned first light-emitting element has a light-emitting surface area that gradually changes along the frame.

In an embodiment of the present invention, the number of the above-mentioned photosensitive elements is one, and the number of the first light-emitting elements is multiple.

In an embodiment of the present invention, the orthographic projection of the reflector on the casing overlaps the orthographic projection of the first light-emitting element on the casing.

In an embodiment of the present invention, the number of the above-mentioned photosensitive elements is multiple, and the number of the first light-emitting element is one.

In an embodiment of the present invention, the orthographic projection of the reflector on the casing overlaps the orthographic projection of a photosensitive element on the casing.

In an embodiment of the present invention, the number of the above-mentioned photosensitive elements is multiple, and the number of the first light-emitting element is multiple.

In an embodiment of the present invention, the orthographic projection of the reflector on the casing overlaps the orthographic projection of a photosensitive element and a first light-emitting element on the casing.

In an embodiment of the present invention, the above-mentioned display panel has a display area and a peripheral area, and the display area is exposed from the opening.

In an embodiment of the present invention, the above-mentioned first light-emitting element is located in the display area or the peripheral area.

In an embodiment of the present invention, the above-mentioned photosensitive element is located in the peripheral area.

In an embodiment of the present invention, the above-mentioned display panel further includes a plurality of scan lines, and the photosensitive element and the first light-emitting element are electrically connected to the same scan line.

In an embodiment of the present invention, the reflectivity of the above-mentioned reflector is greater than the reflectivity of the casing.

In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.

FIG. 1A is a schematic exploded view of an optical knob device 10 according to an embodiment of the present invention. FIG. 1B is a schematic cross-sectional view of the optical knob device 10 of FIG. 1A . FIG. 1C is a schematic circuit diagram of the light-emitting element LD1 and the light-sensing element SR of the optical knob device 10 shown in FIG. 1A .

Please refer to FIG. 1A and FIG. 1B at the same time, the optical knob device 10 includes: a casing 110 , a reflector 120 , a display panel 130 and a photosensitive element SR. The housing 110 has an opening OP. The reflector 120 is disposed on the inner surface of the casing 110 . The display panel 130 is located inside the casing 110, is exposed from the opening OP, and includes a plurality of light emitting elements LD. The photosensitive element SR is used to sense light emitted by one light-emitting element LD1 among the plurality of light-emitting elements LD and reflected by the reflection member 120 .

Based on the above, in the optical knob device 10 of an embodiment of the present invention, by disposing the reflector 120 on the housing 110 , the light emitted by the light-emitting element LD1 of the display panel 130 can be reflected by the reflector 120 to the photosensitive element SR, in this way, the amount of reflected light sensed by the photosensitive element SR can be used to determine the rotation angle of the optical knob device 10 .

Hereinafter, with reference to FIGS. 1A to 1C , the embodiments of the various elements and components of the optical knob device 10 will be continued to be described, but the present invention is not limited thereto.

1A and FIG. 1B, in this embodiment, the casing 110 may include a lower plate 111 and a frame 112, and the frame 112 may be connected to the periphery of the lower plate 111, so that the casing 110 has an accommodating space inside, for example, using space for accommodating the display panel 130 . In addition, the user can view the display screen of the display panel 130 through the opening OP of the casing 110 .

In some embodiments, the housing 110 may further include a pivot SF, the pivot SF may be disposed on the outer side of the lower plate 111 of the housing 110, and the pivot SF may be disposed on the central axis CA of the optical knob device 10, Alternatively, the pivot shaft SF may be disposed coaxially with the optical knob device 10 such that the housing 110 can be rotated relative to the central axis CA of the optical knob device 10 . In some embodiments, the housing 110 may be rotatably secured to the pivot SF such that the housing 110 may be rotated relative to the pivot SF. When the casing 110 is rotated, the reflector 120 on the casing 110 can move relative to the light emitting element LD1 and the photosensitive element SR. In some embodiments, the optical knob device 10 can be arranged on, for example, some equipment or machine, and at the same time, the housing 110 of the optical knob device 10 can be rotatably fixed on the above-mentioned equipment or machine through the pivot SF, Thus, the user is allowed to operate the above-mentioned equipment or machine through the optical knob device 10 .

In this embodiment, the reflector 120 is disposed on the inner surface of the casing 110 and on the lower plate 111 , but the present invention is not limited thereto. The reflector 120 may have a uniformly distributed reflectivity, and the reflector 120 may have a tapered width along its length. For example, in this embodiment, the length of the reflector 120 may extend along the direction D1 around the central axis CA, and the reflector 120 has an increasing width along the direction D1, but not limited thereto. In some embodiments, the reflector 120 may have a decreasing width along the direction D1. Since the reflector 120 itself has a uniformly distributed reflectivity, the area with a larger width can reflect a larger amount of light, while the area with a smaller width reflects a smaller amount of light. Depending on the position of 120 , the photosensitive element SR can measure different amounts of sensed light. Therefore, the position of the photosensitive element SR relative to the reflector 120 can be deduced from the amount of sensed light measured by the photosensitive element SR, thereby obtaining the rotation angle of the optical knob device 10 .

In some embodiments, the reflector 120 may have a fixed width, and the reflector 120 may have an increasing or decreasing reflectivity along its length (or direction D1 ). When the reflector 120 itself has a fixed width, the area with high reflectivity can reflect more light, while the area with low reflectivity can reflect less light. Depending on the position of the element 120 , the photosensitive element SR can measure different amounts of sensed light. Therefore, the position of the photosensitive element SR relative to the reflector 120 can be deduced from the amount of sensed light measured by the photosensitive element SR, thereby obtaining the rotation angle of the optical knob device 10 .

In the above-mentioned embodiment, the reflectivity of the reflector 120 is preferably greater than that of the housing 110, so as to prevent the reflected light from the housing 110 from interfering with the sensing of the reflected light from the reflector 120 by the photosensitive element SR, thereby affecting the rotation angle judgment. For example, in some embodiments, the reflectivity of the reflector 120 may not be less than 1.1 times the reflectivity of the housing 110 , for example, the reflectivity of the reflector 120 may be 1.2 times, 1.5 times the reflectivity of the housing 110 or more times. The material of the casing 110 may be plastic, metal or composite material, but not limited thereto. The material of the reflector 120 may be metal, alloy or composite material, but not limited thereto.

In this embodiment, the display panel 130 may include an upper substrate 131 , a lower substrate 132 and a display unit array 133 , but is not limited thereto. The upper substrate 131 and the lower substrate 132 may be, for example, a transparent glass substrate, a flexible polyimide (PI) substrate, or other substrates commonly used in display devices, respectively. The display unit array 133 is sandwiched between the upper substrate 131 and the lower substrate 132, a plurality of light emitting elements LD can be arranged in the display unit array 133, and the light emitted by the light emitting element LD1 of the plurality of light emitting elements LD can be reflected by the reflective member 120 is reflected to the photosensitive element SR. The light emitting element LD may be an organic light emitting diode (OLED) or a micro light emitting diode (Micro-LED), but is not limited thereto. In some embodiments, when the housing 110 is rotatably fixed on the pivot SF, the display panel 130 can be fixed on the pivot SF.

In this embodiment, the photosensitive element SR may be disposed in the display unit array 133, but not limited thereto. The photosensitive element SR may be a photosensitive element using an organic photosensitive material, such as an organic photodetector (OPD) or an organic photovoltaic element (OPV). Alternatively, the photosensitive element SR may be a photosensitive element using an inorganic photosensitive material such as a silicon-rich oxide.

In this embodiment, since the reflector 120 is located on the lower plate 111 , the photosensitive element SR can be disposed on the side of the light emitting element LD1 away from or close to the central axis CA, but not limited thereto. By appropriately configuring the relative positions of the light-emitting element LD1 and the photosensitive element SR and the reflector 120, the light emitted by the light-emitting element LD1 can be reflected by the reflector 120 to the photosensitive element SR, and most of the reflected light from the reflector 120 can be photosensitive. Element SR receives.

In addition, in this embodiment, the display panel 130 may have a display area AA and a peripheral area BA, the light emitting element LD1 may be located in the display area AA, and the photosensitive element SR may be located in the peripheral area BA, but the invention is not limited thereto.

Referring to FIG. 1C , the display panel 130 may further include a plurality of scan lines GL, and the photosensitive element SR and the light emitting element LD1 are electrically connected to the same scan line GL. For example, in this embodiment, the light-emitting element LD1 is electrically connected to the switching element T1, and the light-emitting element SR is electrically connected to the switching element T2. The gates of the switching elements T1 and T2 are both electrically connected to the scan line GL, so that the signal transmitted by the scan line GL can simultaneously control the switching elements T1 and T2 to be turned on or off, and when the switching elements T1 and T2 are turned on , the signal transmitted by the signal line DL1 can be transmitted to the light-emitting element LD1 through the switching element T1, and the signal transmitted by the signal line DL2 can be transmitted to the photosensitive element SR through the switching element T2.

Hereinafter, other embodiments of the present invention will be continued to be described, and the element numbers and related contents used in the embodiments of FIG. 1A to FIG. 1C will be used.

FIG. 2A is a schematic exploded view of an optical knob device 20 according to an embodiment of the present invention. FIG. 2B is a schematic cross-sectional view of the optical knob device 20 of FIG. 2A . Compared with the optical knob device 10 shown in FIGS. 1A to 1C , the difference between the optical knob device 20 shown in FIGS. 2A and 2B is that the reflector 120 is disposed on the inner surface of the housing 110 and located on the frame 112 and the photosensitive element SR is disposed on one side of the light-emitting element LD1 along the direction D1.

In this embodiment, the casing 110 includes a lower plate 111 and a frame 112 . Since the reflector 120 is located on the frame 112, the photosensitive element SR can be disposed on one side of the light emitting element LD1 along the direction D1, but not limited thereto. In some embodiments, the photosensitive element SR may be disposed on one side of the light emitting element LD1 along the opposite direction of the direction D1. By appropriately configuring the relative positions of the light-emitting element LD1 and the photosensitive element SR and the reflector 120, the light emitted by the light-emitting element LD1 can be reflected by the reflector 120 to the photosensitive element SR, and most of the reflected light from the reflector 120 can be photosensitive. Element SR receives.

In this embodiment, the reflector 120 may have a uniform reflectivity, and the reflector 120 may have a width or reflectivity that varies along its length. For example, in this embodiment, the length of the reflector 120 may extend along the frame 112 , and the reflector 120 has an increasing width along the frame 112 , but not limited thereto. In some embodiments, the reflector 120 may have a decreasing width along the bezel 112 . When the reflector 120 itself has a uniform reflectivity, the area with a larger width can reflect more light, and the area with a smaller width can reflect less light. In this way, the relative light measured by the photosensitive element SR The corresponding position of the photosensitive element SR on the reflector 120 can be deduced from the amount of light, so as to obtain the rotation angle of the optical knob device 20 .

In some embodiments, the reflector 120 may have a fixed width, and the reflectivity of the reflector 120 may increase or decrease along the frame 112 . When the reflector 120 itself has a fixed width, the area with high reflectivity can reflect more light, and the area with low reflectivity can reflect less light. The corresponding position of the photosensitive element SR on the reflector 120 can be deduced from the relative light quantity, so as to obtain the rotation angle of the optical knob device 20 .

In addition, in this embodiment, the display panel 130 may have a display area AA and a peripheral area BA, and the light emitting element LD1 and the photosensitive element SR may be located in the peripheral area BA.

FIG. 3A is a schematic exploded view of an optical knob device 30 according to an embodiment of the present invention. FIG. 3B is a schematic cross-sectional view of the optical knob device 30 of FIG. 3A . Compared with the optical knob device 10 shown in FIGS. 1A to 1C , the difference between the optical knob device 30 shown in FIGS. 3A and 3B is that the housing 110 includes a lower plate 111 , a frame 112 and an upper plate 113 , The periphery of the upper plate 113 is connected to the frame 112 , the opening OP is located in the upper plate 113 , and the reflector 120 is located on the upper plate 113 .

In this embodiment, since the reflector 120 is located on the upper plate 113 , the photosensitive element SR can be disposed on the side of the light emitting element LD1 away from the central axis CA, but not limited thereto. In some embodiments, the photosensitive element SR may be disposed on the side of the light emitting element LD1 close to the central axis CA. By appropriately configuring the relative positions of the light-emitting element LD1 and the photosensitive element SR and the reflector 120, the light emitted by the light-emitting element LD1 can be reflected by the reflector 120 to the photosensitive element SR, and most of the reflected light from the reflector 120 can be photosensitive. Element SR receives.

In this embodiment, the reflector 120 may have a uniform reflectivity, and the reflector 120 may have a width or reflectivity that varies along its length. For example, in this embodiment, the length of the reflector 120 may extend along the direction D1 around the central axis CA, and the reflector 120 has an increasing width along the direction D1, but not limited thereto. In some embodiments, the reflector 120 may have a decreasing width along the direction D1. When the reflector 120 itself has a uniform reflectivity, the area with a larger width can reflect more light, and the area with a smaller width can reflect less light. In this way, the relative light measured by the photosensitive element SR The corresponding position of the photosensitive element SR on the reflector 120 can be deduced from the amount of light, so as to obtain the rotation angle of the optical knob device 30 .

In some embodiments, the reflector 120 may have a fixed width, and the reflectivity of the reflector 120 may increase or decrease along the direction D1. When the reflector 120 itself has a fixed width, the area with high reflectivity can reflect more light, and the area with low reflectivity can reflect less light. The corresponding position of the photosensitive element SR on the reflector 120 can be deduced from the relative light quantity, so as to obtain the rotation angle of the optical knob device 30 .

In addition, in this embodiment, the display panel 130 may have a display area AA and a peripheral area BA, the display area AA may be exposed from the opening OP, and the light emitting element LD1 and the photosensitive element SR may be located in the peripheral area BA.

In some embodiments, the reflector 120 of the optical knob device 30 can also be disposed on the lower plate 111 similar to the optical knob device 10 shown in FIGS. 1A to 1B , or similar to the optical knob device 10 shown in FIGS. 2A to 2B . The knob device 10 is disposed on the frame 112, and at the same time, by appropriately configuring the relative positions of the light-emitting element LD1 and the photosensitive element SR and the reflector 120, the light emitted by the light-emitting element LD1 can be reflected by the reflector 120 to the photosensitive element SR, and from the light-emitting element LD1. Most of the reflected light of the reflector 120 can be received by the photosensitive element SR.

4A is a schematic cross-sectional view of an optical knob device 40 according to an embodiment of the present invention. FIG. 4B is a schematic front view of the reflector 120 , the display unit array 433 and the photosensitive element SR of the optical knob device 40 of FIG. 4A . Compared with the optical knob device 10 shown in FIGS. 1A to 1C , the difference between the optical knob device 40 shown in FIGS. 4A and 4B is that the optical knob device 40 includes a plurality of light-emitting elements LD1 and a plurality of photosensitive elements SR; the orthographic projection of the reflector 120 on the casing 110 overlaps the orthographic projection of a photosensitive element SR and a light-emitting element LD1 on the casing 110 ;

In this embodiment, the display panel 130 may have a display area AA and a peripheral area BA, the display area AA may be exposed from the opening OP, and the light emitting element LD1 and the photosensitive element SR may be located in the peripheral area BA.

In this embodiment, the reflector 120 is disposed on the lower plate 111, but not limited to this. The orthographic projection of the reflector 120 on the casing 110 may substantially overlap the orthographic projections of a photosensitive element SR and a light-emitting element LD1 on the casing 110 .

For example, as shown in FIG. 4A , the optical knob device 40 may include 12 light-emitting elements LD1 and 12 light-sensing elements SR, and each light-emitting element LD1 may be disposed adjacent to one light-sensing element SR, so that each light-emitting element LD1 emits light The light reflected by the reflective member 120 can be received by the adjacent photosensitive element SR. In this way, when the optical knob device 40 is rotated and the orthographic projection of the reflector 120 on the casing 110 overlaps the orthographic projection of the light-emitting element LD1 and the adjacent photosensitive element SR on the casing 110 , the photosensitive element overlapped with the reflector 120 The SR can measure a relatively larger amount of sensing light than other non-overlapping photosensitive elements SR. Therefore, the photosensitive element SR that overlaps with the reflector 120 can be determined by the sensed light amount of the photosensitive element SR, and thus the overlapped photosensitive element SR can be determined. The position of the photosensitive element SR obtains the position of the reflector 120 and the rotation angle of the optical knob device 40 .

On the other hand, when the orthographic projection of the reflector 120 on the housing 110 after the optical knob device 40 is rotated is located between two adjacent photosensitive elements SR, the sensing light amount of the two photosensitive elements SR can be compared to determine Determine the distance ratio between the reflection member 120 and the two photosensitive elements SR, and then calculate the position of the reflection member 120 to obtain the rotation angle of the optical knob device 40 .

It is worth mentioning that the number of the light-emitting element LD1 and the photosensitive element SR is not particularly limited, as long as the rotation angle of the optical knob device 40 can be obtained by the amount of light sensed by the photosensitive element SR. For example, in some embodiments, the optical knob device 40 may include 8 light-emitting elements LD1 and 8 light-sensing elements SR. In some embodiments, the optical knob device 40 may include 30 light-emitting elements LD1 and 30 light-sensing elements SR.

5A is a schematic cross-sectional view of an optical knob device 50 according to an embodiment of the present invention. FIG. 5B is a schematic front view of the frame 112 , the reflector 120 , the display unit array 533 and the photosensitive element SR of the optical knob device 50 of FIG. 5A . Compared with the optical knob device 40 shown in FIGS. 4A to 4B , the difference between the optical knob device 50 shown in FIG. 5A and FIG. 5B is that the plurality of photosensitive elements SR of the optical knob device 50 have a frame along the frame 112 . Gradient photosensitive surface area.

5A and 5B at the same time, the display panel 130 may have a display area AA and a peripheral area BA, the display area AA may be exposed from the opening OP, and a plurality of light emitting elements LD1 and a plurality of photosensitive elements SR may be located in the peripheral area BA. The plurality of light emitting elements LD1 may be disposed around the display area AA, that is, the plurality of light emitting elements LD1 may be formed by the outermost light emitting elements LD of the display panel 130, but the invention is not limited thereto.

In this embodiment, the plurality of light-sensing elements SR may be disposed adjacent to the plurality of light-emitting elements LD1 respectively, and the plurality of light-sensing elements SR are located at the periphery of the plurality of light-emitting elements LD1, but not limited thereto. The photosensitive surface areas of the plurality of photosensitive elements SR are all different, and increase or decrease along the frame 112 . In this way, a light-emitting element LD1 and an adjacent photosensitive element SR are overlapped on the orthographic projection of the reflector 120 on the housing 110 . In the case of the orthographic projection of the housing 110 and the area of the reflecting member 120 being fixed, the photosensitive element SR with a larger photosensitive surface area can receive relatively more reflected light from the reflecting member 120, and measure a relatively large sensing light. quantity. Therefore, the photosensitive element SR overlapping with the reflection member 120 can be determined by the amount of the sensed light measured by each photosensitive element SR, so as to obtain the rotation angle of the optical knob device 50 .

For example, in some embodiments, the photosensitive element SR may have a stacked structure of ITO/PEDOT:PSS/P3HT:PCBM/Al, wherein Al is the cathode of the electron receiving end, P3HT:PCBM is the photosensitive layer that generates photocurrent, and PEDOT : PSS is the hole transport layer, and ITO is the anode of the hole receiving end. In this structure, the area of the photosensitive surface of the photosensitive element SR can be changed by changing the overlapping area of ITO and AL.

Alternatively, in some embodiments, the plurality of photosensitive elements SR may have a gradual (increasing or decreasing) photosensitive capability along the frame 112 . For example, when the photosensitive element SR has a laminated structure of ITO/PEDOT:PSS/P3HT:PCBM/Al, the photosensitive ability of the photosensitive element SR can be changed by changing the thickness of the P3HT:PCBM photosensitive layer in each photosensitive element SR. , when the thickness of the P3HT:PCBM photosensitive layer is thinner, the photosensitive ability of the photosensitive element SR is lower, and the sensing light amount that the photosensitive element SR can measure will be less. Therefore, the photosensitive element SR overlapped with the reflection member 120 can be determined by the amount of sensed light measured by each photosensitive element SR, thereby obtaining the rotation angle of the optical knob device 50 .

6 is a schematic front view of the frame 112 , the reflector 120 , the display unit array 633 and the photosensitive element SR of the optical knob device 60 according to an embodiment of the present invention. Compared with the optical knob device 50 shown in FIGS. 5A to 5B , the optical knob device 60 shown in FIG. 6 is different in that the optical knob device 60 includes a plurality of light emitting elements LD1 and a photosensitive element SR.

For example, in this embodiment, the multiple photosensitive elements SR shown in FIG. 5B can be integrated into a single photosensitive element SR, that is, the single photosensitive element SR has a photosensitive surface area or photosensitive capability that changes along the frame 112 . . In addition, the orthographic projection of the reflector 120 on the aforementioned casing may overlap the orthographic projection of one light-emitting element LD1 among the plurality of light-emitting elements LD1 and part of the photosensitive elements SR on the aforementioned casing. In this way, when the area of the reflection member 120 is fixed, the photosensitive element SR can measure different amounts of sensed light correspondingly according to the difference in the area of the photosensitive surface or the photosensitive capability of the region overlapping the reflection member 120 on the photosensitive element SR. , and the area of the photosensitive element SR that overlaps with the reflector 120 can be deduced from the amount of sensed light measured by the photosensitive element SR, so as to obtain the rotation angle of the optical knob device 60 .

7 is a schematic front view of the frame 112 , the reflector 120 , the display unit array 733 and the photosensitive element SR of the optical knob device 70 according to an embodiment of the present invention. Compared with the optical knob device 50 shown in FIGS. 5A to 5B , the optical knob device 70 shown in FIG. 7 is different in that the optical knob device 70 includes a light-emitting element LD1 and a plurality of photosensitive elements SR.

For example, in this embodiment, the plurality of light-emitting elements LD1 shown in FIG. 5B can be integrated into a single light-emitting element LD1 , that is, the light-emitting element LD1 has a ring shape. In addition, the orthographic projection of the reflector 120 on the casing overlaps the orthographic projection of one photosensitive element SR among the plurality of photosensitive elements SR and a part of the light-emitting element LD1 on the casing. In this way, as the position of the reflection member 120 changes, the light emitted by the light emitting element LD1 can be reflected by the reflection member 120 to the photosensitive element SR overlapping the reflection member 120 . Therefore, in the case where the plurality of photosensitive elements SR have photosensitive surface areas (or photosensitive capabilities) that gradually change along the frame 112 and the area of the reflective member 120 is fixed, as the photosensitive surface area of the photosensitive elements SR overlapping with the reflective member 120 ( or photosensitive ability), the optical knob device 70 can measure different amounts of sensed light accordingly. In this way, the photosensitive element SR overlapping with the reflector 120 can be deduced from the measured amount of the sensed light, so as to obtain the rotation angle of the optical knob device 70 .

8 is a schematic front view of the frame 112 , the reflector 120 , the display unit array 833 and the photosensitive element SR of the optical knob device 80 according to an embodiment of the present invention. Compared with the optical knob device 70 shown in FIG. 7 , the optical knob device 80 shown in FIG. 8 is different in that the optical knob device 80 includes a light-emitting element LD1 and a photosensitive element SR.

For example, in this embodiment, the multiple photosensitive elements SR shown in FIG. 7 can be integrated into a single photosensitive element SR, that is, the single photosensitive element SR has a photosensitive surface area or photosensitive capability that changes along the frame 112 . . In this way, when the area of the reflective member 120 is fixed, the photosensitive element SR can measure different amounts of sensed light correspondingly as the width of the area overlapping the reflective member 120 on the photosensitive element SR is different. In this way, the area of the photosensitive element SR that overlaps with the reflector 120 can be deduced from the amount of sensed light measured by the photosensitive element SR, so as to obtain the rotation angle of the optical knob device 80 .

9A is a schematic cross-sectional view of an optical knob device 90 according to an embodiment of the present invention. FIG. 9B is a schematic front view of the frame 112 , the reflector 120 , the display unit array 933 , and the photosensitive element SR of the optical knob device 90 of FIG. 9A . Compared with the optical knob device 80 shown in FIG. 8 , the difference between the optical knob device 90 shown in FIG. 9A and FIG. 9B is that the photosensitive element SR is arranged around the display area AA, the light-emitting element LD1 is arranged around the photosensitive element SR, In addition, the photosensitive element SR has the shape of a ring, and the light emitting element LD1 has a gradually changing width along the frame 112 .

9A and 9B, the display panel 130 may have a display area AA and a peripheral area BA, the display area AA is exposed from the opening OP, and the light emitting element LD1 and the photosensitive element SR may be located in the peripheral area BA. The photosensitive element SR may be disposed around the display area AA, that is, the photosensitive element SR may be adjacent to the outermost light-emitting element LD in the display area AA, but the invention is not limited thereto. In addition, the light-emitting element LD1 may be disposed adjacent to the photosensitive element SR, and the light-emitting element LD1 is located at the periphery of the photosensitive element SR, but is not limited thereto. The width of the light-emitting element LD1 increases or decreases along the frame 112 , so that the light-emitting element LD1 has a light-emitting surface area that increases or decreases along the frame 112 . Different from the area of the light emitting surface in the overlapping area of the reflector 120 , the photosensitive element SR can measure different amounts of sensed light accordingly. Therefore, the area of the light-emitting element LD1 that overlaps with the reflector 120 can be deduced from the amount of sensed light measured by the light-sensing element SR, thereby obtaining the rotation angle of the optical knob device 90 .

In some embodiments, the light-emitting element LD1 of the optical knob device 90 may be divided into a photosensitive element SR as shown in FIG. 7 to form a plurality of sub-light-emitting elements with different light-emitting surface areas. In this way, the sub-light-emitting element with a larger light-emitting surface area can emit a relatively large amount of light, so that the photosensitive element SR can receive a relatively large amount of reflected light from the reflector 120 and measure a relatively large amount of sensed light. . Therefore, the sub-light-emitting element overlapping with the reflector 120 can be determined from the amount of sensed light measured by the light-sensing element SR, thereby obtaining the rotation angle of the optical knob device 90 .

In some embodiments, the light-emitting element LD1 of the optical knob device 90 may be divided into a photosensitive element SR as shown in FIG. 7 to form a plurality of sub-light-emitting elements with different light-emitting surface areas. In this way, the sub-light-emitting element with a larger light-emitting surface area can emit a relatively large amount of light, so that the photosensitive element SR can receive a relatively large amount of reflected light from the reflector 120 and measure a relatively large amount of sensed light. . Therefore, the sub-light-emitting element overlapping with the reflector 120 can be determined from the amount of sensed light measured by the light-sensing element SR, thereby obtaining the rotation angle of the optical knob device 90 .

In addition, in some embodiments, the photosensitive element SR of the optical knob device 90 may also be divided corresponding to the aforementioned sub-light-emitting elements to form a plurality of sub-photosensitive elements with the same photosensitive surface area. In this way, when the orthographic projection of the reflector 120 on the casing 110 overlaps the orthographic projection of a sub-light-emitting element and an adjacent sub-photosensitive element on the casing 110, and the area of the reflector 120 is fixed, the area of the light-emitting surface is The larger sub-light-emitting element can emit relatively more light, so that the adjacent sub-photosensitive elements can receive relatively more reflected light from the reflector 120 and measure a relatively larger amount of sensed light. Therefore, the sub-light-emitting element overlapping the reflector 120 can be determined from the amount of sensed light measured by the sub-light-sensing element, thereby obtaining the rotation angle of the optical knob device 90 .

To sum up, the present invention enables the light emitted by the light-emitting element to be reflected by the reflector to the light-sensing element by appropriately arranging the relative positions of the light-emitting element, the light-sensing element and the reflector of the display panel. At the same time, because the light-emitting element has a light-emitting surface area that gradually changes along the frame, the photosensitive element has a photosensitive surface area or photosensitive capability that gradually changes along the frame, or the reflector has a width or reflectivity that changes along the frame, it is possible to change from the photosensitive element to the light-emitting element. The measured amount of sensed light is used to determine the rotation angle of the optical knob device, thereby providing an optical knob device capable of integrating a display element to determine the rotation angle.

Although the present invention has been disclosed above by the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, The protection scope of the present invention shall be determined by the scope of the appended patent application.

10, 20, 30, 40, 50, 60, 70, 80, 90: Optical knob device

110: Shell

111: Lower board

112: Border

120: Reflector

130: Display panel

131: Upper substrate

132: Lower substrate

133, 433, 533, 633, 733, 833, 933: Display cell arrays

AA: display area

BA: Surrounding area

CA: Center axis

D1: Direction

DL1, DL2: Signal line

GL: scan line

LD, LD1: Light-emitting element

OP: opening

SF: Pivot

SR: photosensitive element

T1, T2: switching elements

FIG. 1A is a schematic exploded view of an optical knob device 10 according to an embodiment of the present invention. FIG. 1B is a schematic cross-sectional view of the optical knob device 10 of FIG. 1A . FIG. 1C is a schematic circuit diagram of the light-emitting element LD1 and the light-sensing element SR of the optical knob device 10 shown in FIG. 1A . FIG. 2A is a schematic exploded view of an optical knob device 20 according to an embodiment of the present invention. FIG. 2B is a schematic cross-sectional view of the optical knob device 20 of FIG. 2A . FIG. 3A is a schematic exploded view of an optical knob device 30 according to an embodiment of the present invention. FIG. 3B is a schematic cross-sectional view of the optical knob device 30 of FIG. 3A . 4A is a schematic cross-sectional view of an optical knob device 40 according to an embodiment of the present invention. FIG. 4B is a schematic front view of the reflector 120 , the display unit array 433 and the photosensitive element SR of the optical knob device 40 of FIG. 4A . 5A is a schematic cross-sectional view of an optical knob device 50 according to an embodiment of the present invention. FIG. 5B is a schematic front view of the frame 112 , the reflector 120 , the display unit array 533 and the photosensitive element SR of the optical knob device 50 of FIG. 5A . 6 is a schematic front view of the frame 112 , the reflector 120 , the display unit array 633 and the photosensitive element SR of the optical knob device 60 according to an embodiment of the present invention. 7 is a schematic front view of the frame 112 , the reflector 120 , the display unit array 733 and the photosensitive element SR of the optical knob device 70 according to an embodiment of the present invention. 8 is a schematic front view of the frame 112 , the reflector 120 , the display unit array 833 , and the photosensitive element SR of the optical knob device 80 according to an embodiment of the present invention. 9A is a schematic cross-sectional view of an optical knob device 90 according to an embodiment of the present invention. FIG. 9B is a schematic front view of the frame 112 , the reflector 120 , the display unit array 933 , and the photosensitive element SR of the optical knob device 90 of FIG. 9A .

10: Optical knob device

110: Shell

111: Lower board

112: Border

120: Reflector

130: Display panel

131: Upper substrate

132: Lower substrate

133: Display cell array

CA: Center axis

D1: Direction

LD, LD1: Light-emitting element

OP: opening

SR: photosensitive element

Claims (10)

An optical knob device, comprising: a casing with an opening; a reflector disposed on the inner surface of the casing; a display panel located inside the casing, exposed from the opening and including a plurality of light-emitting elements; and at least a photosensitive element for sensing light emitted by a first light-emitting element of the plurality of light-emitting elements and reflected by the reflector, wherein the number of the photosensitive elements is one, and the number of the first light-emitting elements is One, and the reflector has a tapered width or reflectivity along its length. The optical knob device according to claim 1, wherein the housing comprises a lower plate and a frame, the frame is connected to the periphery of the lower plate, and the reflector is located on the lower plate or the frame. The optical knob device according to claim 2, wherein the housing further comprises an upper plate, the periphery of the upper plate is connected to the frame, the opening is located in the upper plate, and the reflector is located in the upper plate on the upper plate, the lower plate or the frame. An optical knob device, comprising: a casing with an opening; a reflector disposed on the inner surface of the casing; a display panel located inside the casing, exposed from the opening and including a plurality of light-emitting elements; and at least a photosensitive element for sensing the first light emission of the plurality of light-emitting elements The light emitted by the element and reflected by the reflector, wherein the number of the photosensitive element is one, the number of the first light-emitting element is one, and the photosensitive element has a photosensitive surface that gradually changes along the frame of the casing area or light sensitivity. An optical knob device, comprising: a casing with an opening; a reflector disposed on the inner surface of the casing; a display panel located inside the casing, exposed from the opening and including a plurality of light-emitting elements; and at least a photosensitive element for sensing light emitted by a first light-emitting element of the plurality of light-emitting elements and reflected by the reflector, wherein the number of the photosensitive elements is one, and the number of the first light-emitting elements is One, and the first light-emitting element has a light-emitting surface area that gradually changes along the frame of the casing. The optical knob device of claim 1, 4 or 5, wherein the display panel has a display area and a peripheral area, and the display area is exposed from the opening. The optical knob device of claim 6, wherein the first light-emitting element is located in the display area or the peripheral area. The optical knob device of claim 6, wherein the photosensitive element is located in the peripheral region. The optical knob device according to claim 1, 4 or 5, wherein the display panel further comprises a plurality of scan lines, and the photosensitive element and the first light-emitting element are electrically connected to the same scan line. The optical knob device according to claim 1, 4 or 5, wherein the reflectivity of the reflector is greater than the reflectivity of the housing.

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