Touch knob, control panel and electric appliance

Abstract

The invention discloses a touch knob, a control panel and an electric appliance, and relates to the technical field of knobs, and the touch knob comprises a display assembly which comprises a glass cover plate, a touch liquid crystal display screen assembly and a backlight assembly which are connected in sequence; the knob assembly comprises a metal outer button, a base, a sleeve button, a rubber ring, an encoder, a PCB (Printed Circuit Board) and a rear shell which are connected in sequence; the display assembly is located in the knob assembly; the touch liquid crystal display screen assembly comprises bottom glass, a bottom polaroid, surface glass, a surface polaroid and an FPC. The surface glass covers the bottom glass, the surface polaroid is attached to the outward surface of the surface glass, and the bottom polaroid is attached to the outward surface of the bottom glass; a first metal part is arranged on the surface, facing the bottom glass, of the surface glass, and a second metal part connected with the first metal part is arranged on the surface, facing the surface glass, of the bottom glass; wherein the first metal part is ITO, and the second metal part is linear DUMMY; or, the first metal part is a linear DUMMY, and the second metal part is ITO. Static accumulation can be avoided, and static disappearance is accelerated.

Description

Technical Field

[0001] The present application relates to the technical field of knobs, and in particular to a touch knob, a control panel and an electrical appliance. Background Art

[0002] A touch knob is an input device that combines touch sensing technology and knob operation. It combines the convenience of touch operation and the intuitiveness of knob operation.

[0003] The user can select the corresponding function by touching the touch knob, and set the parameters corresponding to the currently selected function by rotating the knob. For example, the touch knob of the water purifier has the water outlet function of the water purifier set in it. The water outlet function of the water purifier can be selected by clicking the touch screen, and then the temperature and other parameters corresponding to the currently selected water outlet function of the water purifier can be set by rotating the knob.

[0004] However, touching the knob easily generates static electricity, which can cause poor display on the touch screen and damage the device. Summary of the invention

[0005] The purpose of the present application is to provide a touch knob, a control panel and an electrical appliance, which can avoid poor display of the touch screen caused by static electricity accumulation.

[0006] To achieve the above objectives, this application provides the following solutions:

[0007] In a first aspect, the present application provides a touch knob, the touch knob comprising: a display component and a knob component;

[0008] The display assembly includes a glass cover plate, a touch liquid crystal display assembly and a backlight assembly which are connected in sequence;

[0009] The knob assembly comprises a metal outer button, a base, a sleeve button, a rubber ring, an encoder, a PCB and a rear shell which are connected in sequence;

[0010] The display component is located inside the knob component;

[0011] The touch liquid crystal display screen assembly comprises: bottom glass, bottom polarizer, surface glass, surface polarizer and FPC;

[0012] The surface glass cover is arranged on the bottom glass, the surface polarizer is attached to the outward surface of the surface glass, the bottom polarizer is attached to the outward surface of the bottom glass, and the FPC is hot pressed on the IC signal line of the surface glass;

[0013] A first metal part is disposed on a plate surface of the front glass facing the bottom glass, and a second metal part is disposed on a plate surface of the bottom glass facing the front glass; and the first metal part and the second metal part are connected;

[0014] Wherein, the first metal part is ITO, and the second metal part is a linear DUMMY;

[0015] or,

[0016] The first metal portion is a linear DUMMY, and the second metal portion is ITO.

[0017] In a second aspect, the present application provides a control panel, including a touch knob as described in the first aspect above.

[0018] In a third aspect, the present application provides an electrical appliance, comprising a control panel as described in the second aspect above.

[0019] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0020] The present application provides a touch knob, a control panel and an electrical appliance, wherein the touch knob comprises: a display component and a knob component; the display component comprises a glass cover plate, a touch liquid crystal display component and a backlight component connected in sequence; the knob component comprises a metal outer button, a base, a sleeve button, a rubber ring, an encoder, a PCB and a back shell connected in sequence; the display component is located inside the knob component; the touch liquid crystal display component comprises: a bottom glass, a bottom polarizer, a surface glass and a surface polarizer and an FPC; the surface glass cover is arranged on the bottom glass, the surface polarizer is attached to the outward surface of the surface glass, the bottom polarizer is attached to the outward surface of the bottom glass, and the FPC is hot pressed on the IC signal line of the surface glass; a first metal part is arranged on the plate surface of the surface glass facing the bottom glass, and a second metal part is arranged on the plate surface of the bottom glass facing the surface glass; and the first metal part and the second metal part are connected; wherein the first metal part is ITO and the second metal part is a linear DUMMY; or, the first metal part is a linear DUMMY and the second metal part is ITO. In the present disclosure, the DOT DUMMY in the related art is optimized into a linear DUMMY, so that the voltage of the bottom glass and the surface glass can be consistent by connecting the linear DUMMY and ITO, avoiding the generation of static electricity caused by the inconsistent voltage of the bottom glass and the surface glass, and protecting the touch LCD display assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a schematic structural diagram of a touch knob according to an exemplary embodiment;

[0023] Figure 2 is a structural schematic diagram of a touch liquid crystal display assembly according to an exemplary embodiment;

[0024] Figure 3 is a structural schematic diagram of a touch liquid crystal display assembly in the related art according to an exemplary embodiment;

[0025] Figure 4 is a schematic diagram of DOT DUMMY in the related art according to an exemplary embodiment;

[0026] Figure 5 is a schematic diagram of a linear DUMMY according to an exemplary embodiment;

[0027] Figure 6 is a schematic diagram of a circuit structure of a PCB according to an exemplary embodiment;

[0028] Figure 7 is a schematic diagram of a touch knob according to an exemplary embodiment. Description of the drawings:

[0030] 1-display assembly; 11-glass cover; 12-touch LCD display assembly; 121-bottom glass; 1211-second metal part; 123-face glass; 1231-first metal part; 13-backlight assembly; 2-knob assembly; 21-metal outer button; 22-base; 23-sleeve button; 24-rubber ring; 25-encoder; 26-PCB; 27-back shell; 3-screws. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0034] Figure 1 is a schematic diagram of the structure of a touch knob according to an exemplary embodiment. Figure 1 As shown, the touch knob includes: a display component 1 and a knob component 2.

[0035] The display assembly 1 includes a glass cover plate 11 , a touch liquid crystal display assembly 12 and a backlight assembly 13 which are connected in sequence.

[0036] The knob assembly 2 includes a metal outer button 21 , a base 22 , a sleeve button 23 , a rubber ring 24 , an encoder 25 , a printed circuit board (PCB 26 ) and a rear shell 27 which are connected in sequence.

[0037] The display component 1 is located inside the knob component 2 .

[0038] The touch liquid crystal display assembly 12 includes: a bottom glass 121, a bottom polarizer (not shown in the figure), a surface glass 123, a surface polarizer (not shown in the figure), and an FPC (not shown in the figure);

[0039] The surface glass 123 is covered on the bottom glass 121, the surface polarizer is located on the upper surface of the surface glass 123, the bottom polarizer is located on the lower surface of the bottom glass 121, and the FPC is hot pressed on the IC signal line of the surface glass 123, that is, the FPC is hot pressed on the protruding lower surface part of the surface glass 123; wherein the material of the IC signal line can be ITO.

[0040] like Figure 2 As shown, a first metal part 1231 is disposed on the surface of the front glass 123 facing the bottom glass 121, and a second metal part 1211 is disposed on the surface of the bottom glass 121 facing the front glass 123; and the first metal part 1231 and the second metal part 1211 are connected;

[0041] The first metal portion 1231 may be exemplarily indium tin oxide (ITO), and the second metal portion 1211 may be exemplarily a linear dummy.

[0042] or,

[0043] The first metal portion 1231 is a linear DUMMY, and the second metal portion 1211 is ITO.

[0044] like Figure 3As shown, in the touch liquid crystal display assembly 12 of the related art, ITO is set on the surface glass 123, and dot-shaped DUMMY (DOT DUMMY) is set on the bottom glass 121. Since ITO is connected to the grounding point of PCB26, and DOT DUMMY is not connected to the grounding point, the voltage of ITO is inconsistent with the voltage of DOT DUMMY. When the voltages of the bottom glass 121 and the surface glass 123 are inconsistent, static electricity will be generated. The generated static electricity forms an electric field in the touch liquid crystal display assembly 12, causing the liquid crystal molecules in the touch liquid crystal display assembly 12 to deflect, thereby causing the touch liquid crystal display assembly 12 to display poorly.

[0045] However, since DOT DUMMY is set in the related art, if the voltage of the surface glass 123 and the bottom glass 121 need to be consistent, it is necessary to connect the ITO in the surface glass 123 with each of the DOT DUMMY in the bottom glass 121, which is relatively complicated to implement.

[0046] In the present disclosure, when ITO is set on the surface of the surface glass 123 facing the bottom glass 121, and a linear DUMMY is set on the surface of the bottom glass 121 facing the surface glass 123, the ITO and the linear DUMMY are connected together, so that the voltage of the bottom glass 121 and the surface glass 123 are consistent, thereby avoiding the generation of static electricity and protecting the touch LCD display assembly 12.

[0047] When a linear DUMMY is set on the surface of the surface glass 123 facing the bottom glass 121, and an ITO is set on the surface of the bottom glass 121 facing the surface glass 123, the linear DUMMY and ITO are connected together, so that the voltage of the bottom glass 121 and the surface glass 123 are consistent, avoiding the generation of static electricity and protecting the touch LCD display assembly 12.

[0048] The connection of the linear DUMMY and the ITO together may include: one end of the linear DUMMY is connected to any part of the ITO, or may include: one end of the linear DUMMY is connected to one end of the ITO.

[0049] For example, when there are multiple linear DUMMYs, the width between adjacent linear DUMMYs is 0.12 mm.

[0050] In the present disclosure, since the DOT DUMMY in the related art is optimized into a linear DUMMY, the linear DUMMY and ITO can be connected to achieve the same voltage between the bottom glass 121 and the surface glass 123, thereby avoiding the generation of static electricity and protecting the touch liquid crystal display assembly 12.

[0051] In one embodiment, in order to achieve the purpose of achieving the same voltage between the bottom glass 121 and the front glass 123 , the first metal portion 1231 in the front glass 123 and the second metal portion 1211 of the bottom glass 121 may be grounded.

[0052] For example, the first metal portion 1231 and the second metal portion 1211 are both connected to a ground point in the PCB 26 .

[0053] or,

[0054] The display component also includes: a frame; a touch liquid crystal display screen component is located in the frame; the ITO is connected to a ground point in PCB26, the linear DUMMY is connected to the frame, and the frame is connected to a ground point in PCB26.

[0055] When the first metal part 1231 is ITO and the second metal part 1211 is a linear DUMMY, the first metal part 1231 is connected to the grounding point in PCB26, the second metal part 1211 is connected to the frame, and the frame is connected to the grounding point in PCB26; when the first metal part 1231 is a linear DUMMY and the second metal part 1211 is ITO, the second metal part 1211 is connected to the grounding point in PCB26, the first metal part 1231 is connected to the frame, and the frame is connected to the grounding point in PCB26.

[0056] In the above embodiments, the material of the linear DUMMY is exemplarily ITO.

[0057] In one embodiment, Figure 4 As shown, the suspended DOT DUMMY used in the related art, the ESD test disappears slowly at this time, and Figure 5 As shown, the suspended DOT DUMMY is optimized to a linear DUMMY, and the linear DUMMY is placed in the frame SEAL. At this time, the ESD test disappears quickly.

[0058] In one embodiment, Figure 6 As shown, PCB26 includes: DC / DC, MCU, buzzer (BUZZER) and level conversion circuit (Level Conversion);

[0059] The input end of the DC / DC is connected to the power supply (POWER), and the output end of the DC / DC is respectively connected to the driving circuit LCD PANEL of the touch liquid crystal display assembly 12 and the backlight assembly 13 (LED);

[0060] The power pin of the MCU is connected to the power supply; the signal input pin of the MCU is connected to the encoder 25; the first output pin of the MCU is connected to the backlight assembly 13 (LED); the second output pin of the MCU is connected to the buzzer; the third output pin of the MCU is connected to the input end of the level conversion circuit;

[0061] The output end of the level conversion circuit is connected to the driving circuit of the touch liquid crystal display assembly 12; the buzzer is also connected to the power supply;

[0062] The MCU controls the brightness of the backlight assembly 13 through the first output pin; and the MCU controls the volume of the buzzer through the second output pin.

[0063] The PCB 26 can support an external power supply of 3.3 to 5.0V, and output a stable 5V voltage through the DC / DC circuit. This voltage will power the LED and LCD touch screen assembly 12; the external voltage will also directly power the MCU of the knob and the buzzer (BUZZER). The MCU can adjust the volume of the BUZZER and the brightness of the LED through PWM; in order to avoid the difference in the level between the MCU and the LCD driver IC, a level conversion circuit is designed using MOS tubes between the two to ensure normal communication between the MCU and the LCD driver IC; a UART interface is also reserved externally to facilitate subsequent program upgrades. The encoder 25 of this design can use EC3503. The encoder 25 will generate a pulse signal when rotating, and the MCU determines the state of the encoder 25 by reading this signal.

[0064] At present, in the industry, touch knobs mostly use the solution of encoder 25+LCD touch screen to realize the functions of knob adjustment, touch control, and display. Since touch knobs are mostly small-sized solutions (less than 2.0 inches), small-sized black and white LCD screens have more cost advantages than color LCD screens. Even if color LCD screens have the characteristics of rich display colors and free display content, it is difficult for color LCD screens to reflect the advantages brought by the above two characteristics on small-sized devices. Even in UI design, it may cause false touches and inaccurate touches due to the small pictures. In order to solve the problem of single color display of traditional black and white LCD screens, the present invention will print color function logos on the surface of the polarizer.

[0065] like Figure 7As shown, the outermost circular ICON is touchable. After being touched by testers of different age groups, a touch spacing (6.4±0.1mm) suitable for most people is designed, which prevents accidental touches to a great extent. The bottom polarizer in the touch LCD display assembly 12 is printed with high-brightness color ink on the polarizer. When the light of the backlight assembly 13 passes through the ink of the polarizer to the human eye, it presents brilliant colors, and the transmittance is 15%, which is much higher than the transmittance of the color LCD screen, and has lower requirements for the backlight, and is more cost-effective than the color LCD screen.

[0066] In this disclosure Figure 1 When the touch knob shown in the figure is assembled, the glass cover 11 is attached to the touch liquid crystal display assembly 12 through optically clear adhesive (OCA for short), the flexible printed circuit board (FPC for short) of the backlight assembly 13 is connected to the FPC of the touch liquid crystal display assembly 12, and the three are fixed to the base 22 through ultraviolet curing adhesive (UV adhesive), and then the metal outer button 21, the base 22, the sleeve button 23, the encoder 25 and the back shell 27 are assembled by snapping, which has the effect of stabilizing the structure; the rubber ring 24 is placed at the connection between the sleeve button 23 and the back shell 27 to play a buffering role; the PCB 26 is fixed between the encoder 25 and the back shell 27 by soldering, and the FPC of the touch liquid crystal display assembly 12 is connected to the connector (CON for short) of the PCB 26, so that the two can communicate with each other; finally, it is fixed with screws to make the whole structure seamless, and the structure does not require extra auxiliary materials for fixing, has a simple structure, saves costs, and is easy to assemble.

[0067] Furthermore, in the present disclosure, the width of the COM line that cannot enter the frame SEAL is adjusted to 0.1 mm, which effectively avoids mutual interference between lines.

[0068] In order to solve the problem that the black and white LCD screen is sensitive to static electricity, the ITO resistance of the color management interface (Color Management Interface, abbreviated as: CMI) in the touch LCD screen component 12 is optimized during design. The optimized resistance is shown in Table 1. By reducing the ITO resistance, the release speed of static electricity is accelerated, and static electricity accumulation is further avoided.

[0069] Table 1

[0070] PIN Resistance(Ω) SDA 149 SCL 125 RSTB 6081 RST_TSO 229 VSS 43 VSSA 43 VDD 55 VDD3D 55 VDD3A 59 VLCD 79 VREF 73 VCCH 61

[0071] Among them, PIN represents pin, SDA represents serial data pin, SCL represents serial clock pin, RSTB represents reset pin, RST_TSO represents interrupt output pin, VSS represents circuit common ground pin, VSSA represents ground pin of analog circuit part, VDD represents pin for providing working power, VDD3D represents power pin for providing 3V voltage, VDD3A represents power pin for providing 3V working voltage, VLCD represents dynamic drive pin for adjusting LCD working voltage, VREF represents reference voltage pin, and VCCH represents touch sensor voltage pin.

[0072] The present disclosure also provides a control panel, comprising the touch knob in any one of the above embodiments.

[0073] The present disclosure also provides an electrical appliance, comprising a control panel in any one of the above embodiments.

[0074] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A touch knob, characterized in that: The touch knob comprises: a display component and a knob component; The display assembly includes a glass cover plate, a touch liquid crystal display assembly and a backlight assembly which are connected in sequence; The knob assembly comprises a metal outer button, a base, a sleeve button, a rubber ring, an encoder, a PCB and a rear shell which are connected in sequence; The display component is located inside the knob component; The touch liquid crystal display screen assembly comprises: bottom glass, bottom polarizer, surface glass, surface polarizer and FPC; The surface glass cover is arranged on the bottom glass, the surface polarizer is attached to the outward surface of the surface glass, the bottom polarizer is attached to the outward surface of the bottom glass, and the FPC is hot pressed on the IC signal line of the surface glass; A first metal part is disposed on a plate surface of the front glass facing the bottom glass, and a second metal part is disposed on a plate surface of the bottom glass facing the front glass; and the first metal part and the second metal part are connected; Wherein, the first metal part is ITO, and the second metal part is a linear DUMMY; or, The first metal portion is a linear DUMMY, and the second metal portion is ITO.

2. The touch knob according to claim 1, characterized in that: The display assembly further includes: a frame; The touch liquid crystal display screen assembly is located within the frame; The ITO is connected to a ground point in the PCB, the linear DUMMY is connected to the frame, and the frame is connected to a ground point in the PCB.

3. The touch knob according to claim 1, characterized in that: The first metal portion and the second metal portion are both connected to a ground point in the PCB.

4. The touch knob according to claim 1, characterized in that: The width between adjacent linear DUMMYs is 0.12 mm.

5. The touch knob according to claim 1, characterized in that: The PCB includes: a DC / DC module, an MCU, a buzzer and a level conversion circuit; The input end of the DC / DC module is connected to a power supply, and the output end of the DC / DC module is respectively connected to a driving circuit of the touch liquid crystal display assembly and the backlight assembly; The power pin of the MCU is connected to the power supply; the signal input pin of the MCU is connected to the encoder; the first output pin of the MCU is connected to the backlight assembly; the second output pin of the MCU is connected to the buzzer; the third output pin of the MCU is connected to the input end of the level conversion circuit; The output end of the level conversion circuit is connected to the driving circuit of the touch liquid crystal display screen assembly; The buzzer is also connected to the power supply; The MCU controls the brightness of the backlight assembly through the first output pin; and the MCU controls the volume of the buzzer through the second output pin.

6. The touch knob according to claim 5, characterized in that: The level conversion circuit includes a MOS tube.

7. The touch knob according to claim 1, characterized in that: The surface of the bottom polarizer is spray-printed with colorful functional identification.

8. The touch knob according to claim 1, characterized in that: The material of the linear DUMMY is ITO.

9. A control panel, characterized in that: It comprises a touch knob as described in any one of claims 1 to 8.

10. An electrical appliance, characterized in that: Comprising the control panel as claimed in claim 9.

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