CN105551864A - Keyboard and electronic equipment - Google Patents
Keyboard and electronic equipment Download PDFInfo
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- CN105551864A CN105551864A CN201511005150.2A CN201511005150A CN105551864A CN 105551864 A CN105551864 A CN 105551864A CN 201511005150 A CN201511005150 A CN 201511005150A CN 105551864 A CN105551864 A CN 105551864A
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- light source
- pressure
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- amplifier
- keyboard
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- 239000010409 thin film Substances 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims description 24
- 230000005540 biological transmission Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- 239000003086 colorant Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/14—Operating parts, e.g. push-button
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2203/00—Form of contacts
- H01H2203/036—Form of contacts to solve particular problems
- H01H2203/052—Form of contacts to solve particular problems for backlighted keyboards
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2205/00—Movable contacts
- H01H2205/016—Separate bridge contact
- H01H2205/022—Conductive rubber
Landscapes
- Push-Button Switches (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
The invention discloses a keyboard and electronic equipment. The keyboard comprises a key cap, a light source and a thin-film circuit, wherein the light source and the thin-film circuit are electrically connected with the electronic equipment; pressure-conductive rubber is arranged at the lower side of the key cap; when the key cap is pressed, the pressure-conductive rubber is in contact with the thin-film circuit; and when the pressing pressure changes, the electronic equipment adjusts the brightness of the light source through the change of an accessed resistance value of the pressure-conductive rubber in the thin-film circuit. The keyboard disclosed by the invention can achieve the effects that the pressed key lights up and the other keys do not light.
Description
Technical Field
The present invention relates to the field of electronic devices, and in particular, to a keyboard and an electronic device having the same.
Background
At present, a backlight keyboard in an electronic device has a single function and only has two modes of full on and full off. When the keyboard is totally bright at night, the keyboard light and the LCD light are mutually crossed, and the keyboard light and the LCD light are not optical pollution, are not necessarily suitable for all users, and are contrary to the concept of low carbon and environmental protection at present.
And the backlight lamp in present keyboard only has bright and two functions of going out, can not satisfy the user to the strong and weak degree of the light of key cap and the demand that light colour changes simultaneously, and the use form is more single, and experience effect is not good.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a keyboard capable of generating resistance change according to the pressing force for pressing a keycap and an electronic device provided with the keyboard.
In order to solve the technical problems, the invention adopts the technical scheme that:
a keyboard comprises a keycap, a light source and a thin film circuit, wherein the light source and the thin film circuit are electrically connected with an electronic device; wherein the underside of the keycap is provided with pressure-sensitive conductive rubber;
when the keycap is pressed, the pressure-sensitive conductive rubber is in contact with the thin film circuit, and when the pressing pressure changes, the resistance value of the thin film circuit is changed through the pressure-sensitive conductive rubber, so that the electronic equipment adjusts the brightness of the light source.
The light source is arranged on the upper side, the lower side or the periphery of the light guide plate, when the keycap is pressed, the pressure-sensitive conductive rubber is in contact with the thin film circuit, and when the keycap is not pressed, the pressure-sensitive conductive rubber is separated from the thin film circuit; wherein,
the light guide plate is provided with a light transmission groove, the keycap is provided with a light guide column corresponding to the light transmission groove, when the keycap is pressed, the light guide column is at least inserted into one part of the light transmission groove, and when the keycap is not pressed, the light guide column is separated from the light transmission groove.
Wherein, the end of the light guide column is frustum-shaped.
Wherein, the surface of the light-transmitting groove is provided with a light-transmitting coating.
The key cap is further provided with a key cap cover, and at least the materials around the key cap cover are light-transmitting materials.
The invention also provides an electronic device, wherein the electronic device is provided with the keyboard as claimed in any one of claims 1-5; and a control circuit electrically connected with the thin film circuit and the light source is arranged in the electronic equipment so as to adjust the brightness of the light source according to the pressure for pressing the keycap.
The control circuit comprises a detection device, an amplifier, a light source driving device and a controller;
the keys on the keyboard are divided into a plurality of groups, a voltage dividing resistor is arranged on each group of key circuits, and the pressure-sensitive conductive rubber on each group of key circuits is electrically connected with the controller through the thin film circuit and the respective voltage dividing groups; wherein,
the detection device is used for detecting the voltage drop value of the voltage at two ends of the voltage dividing resistor on each group of key circuits, and the voltage drop value is generated by reducing the resistance value due to the pressure of the pressure-sensitive conductive rubber;
the amplifier is electrically connected with the detection device and amplifies the voltage drop value;
the light source driving device is electrically connected with the light source and is used for adjusting the brightness of the light source;
the controller is electrically connected with the amplifier and the light source driving device and is configured to send an electric signal for controlling the brightness of the light source to the light source driving device according to a difference value between the amplified voltage drop value of the amplifier and a reference voltage prestored in the amplifier.
The control circuit comprises a detection device, an amplifier, a comparator, a light source driving device and a controller;
the keys on the keyboard are divided into a plurality of groups, a voltage dividing resistor is arranged on each group of key circuits, and the pressure-sensitive conductive rubber on each group of key circuits is electrically connected with the controller through the thin film circuit and the respective voltage dividing groups; wherein
The detection device is used for detecting the voltage drop value of the voltage at two ends of the voltage dividing resistor on each group of key circuits, and the voltage drop value is generated by reducing the resistance value due to the pressure of the pressure-sensitive conductive rubber;
the amplifier is electrically connected with the detection device and amplifies the voltage drop value;
the comparator is electrically connected with the amplifier and used for comparing the voltage drop value amplified by the amplifier with a reference voltage and outputting a high level or a low level according to a comparison result;
the light source driving device is electrically connected with the light source and is used for adjusting the brightness of the light source;
the controller is electrically connected with the comparator and the light source driving device and is configured to send an electric signal for controlling the brightness of the light source to the light source driving device according to the high level or the low level output by the comparator.
When the comparison result of the comparator is that the voltage drop value amplified by the amplifier is less than or equal to the reference voltage, the comparator outputs a low level, and the controller is configured to send a pulse signal for adjusting the light source to be lightened according to first brightness to the light source driving device;
when the comparison result of the comparator is that the voltage drop value amplified by the amplifier is greater than the reference voltage, the comparator outputs a high level, and the controller is configured to send a pulse signal for adjusting the light source to be lightened according to the second brightness to the light source driving device.
The light sources are divided into a plurality of groups, the colors of the light source lamps in each group are different, and the controller sends electric signals for controlling the light source lamps with different colors to the light source driving device according to the comparison result of the comparator.
Compared with the prior art, the bearing cover and the paver have the beneficial effects that:
1. the pressure-sensitive conductive rubber is arranged below the keycap of the keyboard, so that the keycap can be ensured to automatically bounce after being pressed, and the resistance value of the keycap can be changed according to the pressing force, so that the electronic equipment provided with the keyboard can monitor and respond conveniently;
2. in the keyboard, only when a certain key cap is pressed, the light of the light source can be transmitted to the light guide column through the light transmission groove, so that the corresponding key cap can emit light, and the phenomena that when the key cap is pressed, all keys are lightened, light is not dyed and the like are avoided;
3. the electronic equipment can control the brightness and the color of the light source according to the force of the pressed keycap or the resistance value change of the pressure-sensitive rubber resistor, so that the experience effect of a user is improved, and the electronic equipment has better applicability.
Drawings
FIG. 1 is an exploded view of a keyboard in an embodiment of the present invention;
FIG. 2 is a block diagram of a keyboard without pressing a key cap according to an embodiment of the present invention;
FIG. 3 is a block diagram of a keyboard when key caps are pressed;
FIG. 4 is a schematic block diagram of a control circuit in an electronic device according to a first embodiment of the present invention;
FIG. 5 is a schematic block diagram of a control circuit in an electronic device according to a first embodiment of the present invention;
FIG. 6 is a flowchart of a method for controlling a keyboard in an electronic device according to an embodiment of the present invention;
fig. 7 is a flowchart of a method for controlling a keyboard in an electronic device according to another embodiment of the invention.
Description of the reference numerals
1-light guide plate 2-shading plate
3-thin film circuit 4-keycap
5-aluminum foil plate 6-steel plate
7-pressure sensitive conductive rubber 8-light transmission groove
9-light guide column 10-keycap cover
11-support 101-detection device
102-Amplifier 103-light source driving device
104-controller 105-comparator
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is an exploded structural view of a keyboard according to an embodiment of the present invention; FIG. 2 is a block diagram of a keyboard without pressing a key cap according to an embodiment of the present invention; FIG. 3 is a structural diagram of a keyboard when a keycap is pressed according to an embodiment of the invention. As shown in fig. 1, 2 and 3, the keyboard in the embodiment of the invention comprises a light guide plate 1, a light shielding plate 2, a thin film circuit 3 and a keycap 4 which are sequentially installed, wherein a light source (not shown) such as an LED lamp can be arranged on the upper side, the lower side or the periphery of the light guide plate 1, and light rays emitted by the light source can be uniformly distributed on the lower side of the keyboard through the diffusion effect of the light guide plate 1; in addition, in the embodiment, an aluminum foil plate 5 for supporting the light guide plate 1 is arranged on the lower side of the light guide plate 1, and a steel plate 6 is arranged below the thin film circuit 3; and the underside of the keycap 4 in the embodiment is provided with a pressure-sensitive conductive rubber 7 and a bracket 11 for fixing the pressure-sensitive conductive rubber 7, the pressure-sensitive conductive rubber 7 comprises a key rubber and a pressure-sensitive conductive coating coated on the underside of the key rubber, and the pressure-sensitive conductive coating can also be a block structure and the like. The pressure-sensitive conductive rubber 7 is deformed by being pressed due to the elastic action of the key rubber, and has a characteristic that the resistance is smaller as the pressure is larger. When the key cap 4 is pressed, the pressure-sensitive conductive rubber 7 is pressed into contact with the thin-film circuit 3, and when the key cap 4 is not pressed, the pressure-sensitive conductive rubber 7 is separated from the thin-film circuit 3; and when the pressure for pressing the key cap changes, the resistance value is changed in the film circuit through the pressure-sensitive conductive rubber 7, and the electronic equipment electrically connected with the keyboard can adjust the brightness of the light source, so that the brightness of the pressed key is adjusted. In addition, the surface of the light-transmitting groove 8 can be coated with a light-transmitting coating to increase the light-guiding effect; the keycap 4 can be further provided with a keycap cover 10, and at least the materials around the keycap cover 10 are light-transmitting materials, so that light can better penetrate through the keycap 4.
As shown in fig. 2, the light guide plate 1 is provided with a light-transmitting groove 8, and the key cap 4 is provided with a light guide pillar 9 corresponding to the light-transmitting groove 8, as shown in fig. 3, when the key cap 4 is pressed, the pressure-sensitive conductive rubber 7 is pressed to contact with the thin film circuit 3 to form an electrical connection, and the light guide pillar 9 is at least inserted into a part of the light-transmitting groove 8, so that light can pass through the light guide pillar 9 to make the corresponding key cap 4 emit light; when the key cap 4 is not pressed, the pressure-sensitive conductive rubber 7 is separated from the thin film circuit 3, and the light guide pillar 9 is separated from the light transmission groove 8, and meanwhile, due to the existence of the incident angle theta, light rays in the light guide plate 1 are not easy to enter the key cap 10, wherein the incident angle theta can be smaller than 30 degrees, and the specific value depends on the material. The end of the light guide pillar 9 in this embodiment is frustum-shaped.
Fig. 4 is a schematic block diagram of a control circuit in an electronic device according to a first embodiment of the present invention, in which the electronic device in this embodiment is provided with a keyboard as shown in fig. 1 to 4, and the electronic device in this embodiment is provided with a control circuit electrically connected to the thin film circuit 3 and the light source, so as to adjust the brightness of the light source in the keyboard according to whether the key cap 4 is pressed.
As shown in fig. 4, the control circuit in the present embodiment may include a detection device 101, an amplifier 102, a light source driving device 103, and a controller 104.
In this embodiment, the keys on the keyboard may be divided into a plurality of groups, such as 8 groups in this embodiment, and each group of key circuits is provided with a voltage dividing resistor R, and the pressure-sensitive conductive rubber 7 on each group of key circuits is electrically connected to the controller 104 through the thin film circuit 3 and the respective voltage dividing group R; for example, 8 KSI pins of the controller 103 may be connected to correspond to 8 key lines, respectively.
In this embodiment, the detecting device 101 is configured to detect a voltage drop value of voltages at two ends of the voltage dividing resistor R on each group of key lines, where the voltage drop value is generated when the pressure-sensitive conductive rubber 7 under the keycap is pressed to reduce a resistance value when the key on the group of key lines is pressed; since the voltage-sensitive conductive rubber 7 is pressed and the resistance is decreased, the voltage at the two ends of the voltage-dividing resistor R on the line is increased, the detection device 101 can detect the change of the voltage value, the change of the voltage value is called as a voltage drop value, and the voltage drop value in the circuit is small, so that the amplifier 102 is electrically connected with the detection device 101 in the embodiment to amplify the voltage drop value, thereby facilitating data processing; the light source driving device 103 is electrically connected with the light source and used for adjusting the brightness of the light source in the keyboard; the controller 104 is electrically connected with the amplifier 102 and the light source driving device 103, and sends an electric signal for controlling the brightness of the light source to the light source driving device 103 according to the difference between the amplified voltage drop value of the amplifier 102 and the reference voltage prestored in the amplifier; specifically, when the difference value is larger, the voltage is also larger, the light source is brighter, and when the key is not pressed, because the voltage drop value of the voltage-dividing resistor is zero, the controller 104 sends an electric signal for controlling the brightness of the light source to be zero to the light source driving device 103, so that the purpose of saving electric energy is achieved, and the effect of adjusting the brightness of the light source according to the force for pressing the keycap 4 is achieved.
In addition, as shown in fig. 5, a schematic block diagram of a control circuit in the electronic device according to the second embodiment of the present invention is shown, and the control circuit in this embodiment includes a detection device 101, an amplifier 102, a comparator 105, a light source driving device 103, and a controller 104.
Similarly, the keys on the keyboard in this embodiment may also be divided into a plurality of groups, and a voltage dividing resistor R is disposed on the key circuit of each group, and the pressure-sensitive conductive rubber 7 on each group of key circuits is electrically connected to the controller 104 through the thin film circuit 3 and the respective voltage dividing groups R; the detection device 101 is used for detecting voltage drop values of voltages at two ends of the divider resistor R on each group of key circuits, and the amplifier 102 is electrically connected with the detection device 101 and amplifies the voltage drop values; the comparator 105 is electrically connected to the amplifier 102, compares the voltage drop value amplified by the amplifier 102 with a reference voltage, and outputs a high level or a low level according to the comparison result; the light source driving device 103 is electrically connected with the light source and used for adjusting the brightness of the light source; the controller 104 is electrically connected to the comparator 105 and the light source driving device 103, and transmits a pulse electrical signal for controlling the brightness of the light source to the light source driving device 103 according to the high level or the low level output by the comparator 105.
Specifically, when the comparison result is that the voltage drop value amplified by the amplifier 102 is less than or equal to the reference voltage, the comparator 105 outputs a low level, and the controller 104 is configured to send a pulse signal for adjusting the light source to be turned on at the first brightness to the light source driving device 103; when the comparison result is that the voltage drop value amplified by the amplifier is greater than the reference voltage, the comparator 105 outputs a high level, and the controller 104 is configured to send a pulse signal for adjusting the light source to be turned on at the second brightness to the light source driving device 103. In essence, in this embodiment, the light source driving device 103 adjusts the flashing frequency of the light source according to the pulse control signal sent by the controller 104, when the received signal is a high level, the visual effect is bright when the flashing frequency is fast, and when the received signal is a low level, the visual effect is dark when the flashing frequency is slow, and accordingly, the brightness of the pressed keycap changes, so that the effect that the brightness of the light source is bright when the pressing force is large is achieved.
In a preferred embodiment, the light sources may be divided into a plurality of groups, and the color of each group of light sources is different, and the controller 104 may send an electrical signal for controlling the light sources of different colors to the light source driving device 103 according to a comparison result between the amplified voltage drop value and a reference voltage therein, or according to a comparison result of the comparator 105. Thereby realizing the effects of different pressing strength and different colors of the light source.
Fig. 6 is a flowchart of a method for controlling a keyboard in an electronic device according to an embodiment of the present invention; the control circuit in the electronic equipment detects whether the keycap on the keyboard is pressed or not, and adjusts the brightness of the light source in the keyboard according to the detection result. The method specifically comprises the following steps:
s1: the detection device detects the voltage drop value of the voltage at two ends of the divider resistor on each group of key lines and sends the voltage drop value to the amplifier, wherein the voltage drop value is generated by reducing the resistance value due to the compression of the pressure-sensitive conductive rubber;
s2: the amplifier amplifies the power of the voltage drop value received from the detection device and sends the amplified result to the controller;
s3: the controller sends an electric signal for adjusting the brightness of the light source to the light source driving device according to the difference between the voltage drop value amplified by the amplifier and the reference voltage prestored in the amplifier.
FIG. 7 is a flowchart of a method for controlling a keyboard in an electronic device according to another embodiment of the present invention; the method comprises the following steps:
s1: the detection device detects the voltage drop value of the voltage at two ends of the divider resistor on each group of key lines and sends the voltage drop value to the amplifier, wherein the voltage drop value is generated by reducing the resistance value due to the compression of the pressure-sensitive conductive rubber;
s2: the amplifier amplifies the power of the voltage drop value received from the detection device and sends the amplified result to the comparator;
s3: the comparator compares the amplified voltage drop value received by the comparator with a reference voltage and sends a high level or low level signal based on the comparison result to the controller;
s4: the controller controls the light source driving device to adjust the brightness of the light source lamp according to the comparison result of the comparator.
When the voltage drop value amplified by the amplifier is less than or equal to the reference voltage in step S3, the controller transmits an electrical signal for controlling the light source lamp to be turned on at a first brightness to the light source driving device in step S4; when the voltage drop value amplified by the amplifier in step S3 is greater than the reference voltage, the controller transmits an electrical signal for controlling the light source lamp to be turned on at a second brightness to the light source driving device in step S4.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (10)
1. A keyboard comprises a keycap, a light source and a thin film circuit, wherein the light source and the thin film circuit are electrically connected with an electronic device; wherein the underside of the keycap is provided with pressure-sensitive conductive rubber;
when the keycap is pressed, the pressure-sensitive conductive rubber is in contact with the thin film circuit, and when the pressing pressure changes, the resistance value of the thin film circuit is changed through the pressure-sensitive conductive rubber, so that the electronic equipment adjusts the brightness of the light source.
2. The keyboard of claim 1, wherein: the light source is arranged on the upper side, the lower side or the periphery of the light guide plate, when the keycap is pressed, the pressure-sensitive conductive rubber is in contact with the thin film circuit, and when the keycap is not pressed, the pressure-sensitive conductive rubber is separated from the thin film circuit; wherein,
the light guide plate is provided with a light transmission groove, the keycap is provided with a light guide column corresponding to the light transmission groove, when the keycap is pressed, the light guide column is at least inserted into one part of the light transmission groove, and when the keycap is not pressed, the light guide column is separated from the light transmission groove.
3. The keyboard of claim 2, wherein: the end part of the light guide column is in a frustum shape.
4. The keyboard of claim 2, wherein: and the surface of the light-transmitting groove is provided with a light-transmitting coating.
5. The keyboard of any one of claims 1 to 4, wherein: the key cap is further provided with a key cap cover, and at least the materials around the key cap cover are light-transmitting materials.
6. An electronic device, characterized in that: the electronic equipment is provided with a keyboard as claimed in any one of claims 1-5; and a control circuit electrically connected with the thin film circuit and the light source is arranged in the electronic equipment so as to adjust the brightness of the light source according to the pressure for pressing the keycap.
7. The electronic device of claim 6, wherein: the control circuit comprises a detection device, an amplifier, a light source driving device and a controller;
the keys on the keyboard are divided into a plurality of groups, a voltage dividing resistor is arranged on each group of key circuits, and the pressure-sensitive conductive rubber on each group of key circuits is electrically connected with the controller through the thin film circuit and the respective voltage dividing groups; wherein,
the detection device is used for detecting the voltage drop value of the voltage at two ends of the voltage dividing resistor on each group of key circuits, and the voltage drop value is generated by reducing the resistance value due to the pressure of the pressure-sensitive conductive rubber;
the amplifier is electrically connected with the detection device and amplifies the voltage drop value;
the light source driving device is electrically connected with the light source and is used for adjusting the brightness of the light source;
the controller is electrically connected with the amplifier and the light source driving device and is configured to send an electric signal for controlling the brightness of the light source to the light source driving device according to a difference value between the amplified voltage drop value of the amplifier and a reference voltage prestored in the amplifier.
8. The electronic device of claim 6, wherein: the control circuit comprises a detection device, an amplifier, a comparator, a light source driving device and a controller;
the keys on the keyboard are divided into a plurality of groups, a voltage dividing resistor is arranged on each group of key circuits, and the pressure-sensitive conductive rubber on each group of key circuits is electrically connected with the controller through the thin film circuit and the respective voltage dividing groups; wherein
The detection device is used for detecting the voltage drop value of the voltage at two ends of the voltage dividing resistor on each group of key circuits, and the voltage drop value is generated by reducing the resistance value due to the pressure of the pressure-sensitive conductive rubber;
the amplifier is electrically connected with the detection device and amplifies the voltage drop value;
the comparator is electrically connected with the amplifier and used for comparing the voltage drop value amplified by the amplifier with a reference voltage and outputting a high level or a low level according to a comparison result;
the light source driving device is electrically connected with the light source and is used for adjusting the brightness of the light source;
the controller is electrically connected with the comparator and the light source driving device and is configured to send an electric signal for controlling the brightness of the light source to the light source driving device according to the high level or the low level output by the comparator.
9. The electronic device of claim 8, wherein: when the comparison result of the comparator is that the voltage drop value amplified by the amplifier is less than or equal to the reference voltage, the comparator outputs a low level, and the controller is configured to send a pulse signal for adjusting the light source to be lightened according to first brightness to the light source driving device;
when the comparison result of the comparator is that the voltage drop value amplified by the amplifier is greater than the reference voltage, the comparator outputs a high level, and the controller is configured to send a pulse signal for adjusting the light source to be lightened according to the second brightness to the light source driving device.
10. The electronic device of claim 7 or 8, wherein: the light sources are divided into a plurality of groups, the colors of the light source lamps in each group are different, and the controller sends electric signals for controlling the light source lamps with different colors to the light source driving device according to the comparison result of the comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511005150.2A CN105551864A (en) | 2015-12-28 | 2015-12-28 | Keyboard and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511005150.2A CN105551864A (en) | 2015-12-28 | 2015-12-28 | Keyboard and electronic equipment |
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| CN105551864A true CN105551864A (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511005150.2A Pending CN105551864A (en) | 2015-12-28 | 2015-12-28 | Keyboard and electronic equipment |
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| CN (1) | CN105551864A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107451989A (en) * | 2016-05-13 | 2017-12-08 | 富士通株式会社 | Input unit, the check device of input unit, inspection method and inspection program |
| CN109785936A (en) * | 2019-01-23 | 2019-05-21 | 中新科技集团股份有限公司 | A kind of mood test method, apparatus, equipment and computer readable storage medium |
| CN111163548A (en) * | 2019-12-31 | 2020-05-15 | 维沃移动通信有限公司 | Lamplight display control method and device |
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| CN204087062U (en) * | 2014-09-19 | 2015-01-07 | 合肥联宝信息技术有限公司 | light feedback keyboard and notebook computer |
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| CN1655097A (en) * | 2004-02-10 | 2005-08-17 | 刘二中 | Device with keyboard entry function and input method |
| CN102346551A (en) * | 2010-07-29 | 2012-02-08 | 致伸科技股份有限公司 | Pressure sensing luminous keyboard |
| CN203038828U (en) * | 2012-12-13 | 2013-07-03 | 嘉兴淳祥电子科技有限公司 | Film switch structure for computer keyboard |
| CN204087062U (en) * | 2014-09-19 | 2015-01-07 | 合肥联宝信息技术有限公司 | light feedback keyboard and notebook computer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107451989A (en) * | 2016-05-13 | 2017-12-08 | 富士通株式会社 | Input unit, the check device of input unit, inspection method and inspection program |
| CN109785936A (en) * | 2019-01-23 | 2019-05-21 | 中新科技集团股份有限公司 | A kind of mood test method, apparatus, equipment and computer readable storage medium |
| CN111163548A (en) * | 2019-12-31 | 2020-05-15 | 维沃移动通信有限公司 | Lamplight display control method and device |
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Application publication date: 20160504 |