Patents Assigned to Darfon Electronics Corp.
  • Publication number: 20240379308
    Abstract: A backlight keyswitch includes a keyswitch body, a membrane circuit board disposed under the keyswitch body, a backlight module and an elastic body having a bridge structure, a central pillar, and a ring-shaped base disposed on the membrane circuit board. The keyswitch body has a keycap with a symbol. The backlight module is disposed under the membrane circuit board for emitting light to the symbol. The elastic body is disposed between the keycap and the membrane circuit board for returning the keycap to its original position. The bridge structure extends from the ring-shaped base toward the keycap to connect to the central pillar for supporting the central pillar, such that the central pillar is suspended relative to the membrane circuit board and abuts against the keycap. A projection of the central pillar on the keycap completely covers the symbol.
    Type: Application
    Filed: April 23, 2024
    Publication date: November 14, 2024
    Applicant: Darfon Electronics Corp.
    Inventors: Chih-Hung Chien, Chih-Chung Yen
  • Publication number: 20240379303
    Abstract: A backlight module for a lighting keyboard including at least two heat-dissipating keys comprises a reflective layer, a light guide panel and a shielding sheet and has at least two penetration channels. The reflective layer, the light guide panel and the shielding sheet are stacked up and down. The penetration channels symmetrically correspond to the heat-dissipating keys respectively and penetrate the reflective layer, the light guide panel and the shielding sheet. The penetration channels are respectively provided with one light-reducing pattern at their periphery for blocking light. At least two diffusion patterns are arranged adjacent to the light-reducing patterns for guiding light to illuminate the heat-dissipating keys. The light-reducing patterns and the diffusion patterns form at least two heat-reducing optical pattern groups respectively. The heat-reducing optical pattern groups respectively corresponding to the heat-dissipating keys have identical patterns.
    Type: Application
    Filed: July 23, 2024
    Publication date: November 14, 2024
    Applicant: Darfon Electronics Corp.
    Inventors: Yen-Chang CHEN, Po-Yueh CHOU
  • Publication number: 20240379306
    Abstract: A key structure including a keycap, a base plate, at least one bracket and a circuit board is provided. The base plate is arranged opposite to the keycap and includes at least one through hole located under the keycap. The bracket is rotatably connected between the keycap and the base plate, keeps flat when the keycap is lowered to a lowest position, stands obliquely when the keycap is raised, and includes at least one abutting portion and a lower protrusion. The circuit board is located between the keycap and the base plate and has at least one opening and at least one extension portion. When the keycap reaches the lowest position, the extension portion of the circuit board at least partly overlaps with the abutting portion of the bracket, and the lower protrusion of the bracket at least partly enters at least one opening of the circuit board.
    Type: Application
    Filed: April 30, 2024
    Publication date: November 14, 2024
    Applicant: Darfon Electronics Corp.
    Inventors: Hsun-Kun PENG, Po-Wei TSAI
  • Patent number: 12124638
    Abstract: A key scanning method and an input device thereof are provided. The key scanning method for an input device with at least a first key group and a subsidiary key group comprises: triggering a first main scan line electrically connected to the first key group and reading electrical signals received via a plurality of signal sensing lines electrically connected to the first key group to determine whether any said key among the first key group is triggered; and triggering a non-triggered one of a plurality of subsidiary scan lines electrically connected to the subsidiary key group and reading electrical signals received via another plurality of signal sensing lines electrically connected to the subsidiary key group to determine whether any said key among the subsidiary key group is triggered, wherein the first main scan line and the subsidiary scan lines are triggered one after another for multiple times.
    Type: Grant
    Filed: February 15, 2022
    Date of Patent: October 22, 2024
    Assignees: Darfon Electronics Corp., DARFON ELECTRONICS (SUZHOU) CO., LTD.
    Inventor: Te Ping Hsu
  • Publication number: 20240274379
    Abstract: A backlight module for a lighting keyboard including at least two heat-dissipating keys comprises a reflective layer, a light guide panel and a shielding sheet and has at least two penetration channels. The reflective layer, the light guide panel and the shielding sheet are stacked up and down. The penetration channels symmetrically correspond to the heat-dissipating keys respectively and penetrate the reflective layer, the light guide panel and the shielding sheet. The penetration channels are respectively provided with one light-reducing pattern at their periphery for blocking light. At least two diffusion patterns are arranged adjacent to the light-reducing patterns for guiding light to illuminate the heat-dissipating keys. The light-reducing patterns and the diffusion patterns form at least two heat-reducing optical pattern groups respectively. The heat-reducing optical pattern groups respectively corresponding to the heat-dissipating keys have identical patterns.
    Type: Application
    Filed: December 28, 2023
    Publication date: August 15, 2024
    Applicant: Darfon Electronics Corp.
    Inventors: Yen-Chang CHEN, Po-Yueh CHOU
  • Patent number: 12020873
    Abstract: A sensing keyswitch including a key body, a key-sensing switch and an enabling switch is provided. The key body includes a key top, and a key driver and an enabler which can move with the key top in the same keystroke cycle. The key-sensing switch electrically connected to a key circuit is in a disabled mode to save power and cannot sense the change of the sensing intensity caused by the movement of the driver. The enabling switch is electrically connected to an enabling circuit, wherein when the enabling switch is triggered by the enabler, the enabling switch outputs an enabling signal through the enabling circuit for enabling the key-sensing switch to enter an enabled mode, so that the key-sensing switch can sense the change of the sensing intensity caused by the movement of the key driver to trigger a key signal.
    Type: Grant
    Filed: August 24, 2022
    Date of Patent: June 25, 2024
    Assignee: Darfon Electronics Corp.
    Inventors: Yu Chun Hsieh, Chen Yang, Chia Hung Liu, Shao Lun Hsiao
  • Publication number: 20240112870
    Abstract: A backlight module for a lighting keyboard comprises a lighting board including light emitting units, a light guide panel disposed on the lighting board and including light guide holes, and a shielding sheet disposed on the light guide panel. Each light emitting unit is located in each light guide hole. The backlight module is divided into regions including a middle region and two first side regions located outside the middle region. The light guide holes include at least one middle light guide hole in the middle region and at least one first light guide hole in the first side region. A distance between a light emitting unit located in the middle light guide hole and a wall of the middle light guide hole is lesser than a distance between a light emitting unit located in the first light guide hole and a wall of the first light guide hole.
    Type: Application
    Filed: September 28, 2023
    Publication date: April 4, 2024
    Applicant: Darfon Electronics Corp.
    Inventors: Yen-Chang CHEN, Heng-Yi HUANG
  • Publication number: 20230341606
    Abstract: A backlit module for a backlit keyboard is provided. The backlit module includes a lighting board. The lighting board includes a substrate and an electronic device layer. The electronic device layer is disposed on the substrate. The electronic device layer includes a plurality of key circuit groups. Each of the key circuit groups corresponds to a key group of the backlit keyboard, and includes one or more light sources and a resistor. When the key circuit group includes a plurality of light sources, the light sources are arranged in parallel. The one or more light sources correspond to one or more key of the key group. The resistor is arranged in series with the one or more light sources.
    Type: Application
    Filed: April 7, 2023
    Publication date: October 26, 2023
    Applicant: Darfon Electronics Corp.
    Inventors: Hsin-Cheng HO, Heng-Yi HUANG
  • Publication number: 20230326692
    Abstract: An illuminant board includes a substrate, a circuit layer, a light guide plate, a plurality of microstructures and at least one illuminant. The substrate defines at least one key projection. The circuit layer is disposed on the substrate. The circuit layer includes at least one high-potential main conductive wire and at least one low-potential main conductive wire. The light guide plate is disposed opposite to the circuit layer. The microstructures are located between the light guide plate and the substrate. The illuminant is coupled to the circuit layer. The illuminant provides a luminous light inletting into the light guide plate, and a path of the luminous light is guided by the microstructures. The high-potential main conductive wire and/or the low-potential main conductive wire extend and pass through the key projection. Orthographic projections of the microstructures are located between the high-potential main conductive wire and the low-potential main conductive wire.
    Type: Application
    Filed: April 4, 2023
    Publication date: October 12, 2023
    Applicant: Darfon Electronics Corp.
    Inventors: Hsin-Cheng HO, Heng-Yi HUANG
  • Publication number: 20230129863
    Abstract: A sensing keyswitch including a key body, a key-sensing switch and an enabling switch is provided. The key body includes a key top, and a key driver and an enabler which can move with the key top in the same keystroke cycle. The key-sensing switch electrically connected to a key circuit is in a disabled mode to save power and cannot sense the change of the sensing intensity caused by the movement of the driver. The enabling switch is electrically connected to an enabling circuit, wherein when the enabling switch is triggered by the enabler, the enabling switch outputs an enabling signal through the enabling circuit for enabling the key-sensing switch to enter an enabled mode, so that the key-sensing switch can sense the change of the sensing intensity caused by the movement of the key driver to trigger a key signal.
    Type: Application
    Filed: August 24, 2022
    Publication date: April 27, 2023
    Applicant: Darfon Electronics Corp.
    Inventors: Yu Chun HSIEH, Chen YANG, Chia Hung LIU, Shao Lun HSIAO
  • Patent number: 11605512
    Abstract: A key structure is provided. The key structure includes a base plate, a key cap and a lifting mechanism is provided. The base plate includes a first bottom wall. The key cap is disposed opposite to the base plate and includes a first cap wall. The lifting mechanism is movably connected between the key cap and the base plate, so that the key cap could reciprocate with respect to the base plate. The lifting mechanism includes a first lower shaft portion and a first upper shaft portion, which are respectively movably connected on the same side of the key cap and the base plate. When the key cap is in a released state, the first upper shaft portion presses against the first cap wall, but the first lower shaft portion is separated from the bottom wall by a maintaining gap.
    Type: Grant
    Filed: April 11, 2022
    Date of Patent: March 14, 2023
    Assignee: Darfon Electronics Corp.
    Inventors: Po-Chun Hou, Chin-Hung Lin
  • Publication number: 20220336165
    Abstract: A key structure is provided. The key structure includes a base plate, a key cap and a lifting mechanism is provided. The base plate includes a first bottom wall. The key cap is disposed opposite to the base plate and includes a first cap wall. The lifting mechanism is movably connected between the key cap and the base plate, so that the key cap could reciprocate with respect to the base plate. The lifting mechanism includes a first lower shaft portion and a first upper shaft portion, which are respectively movably connected on the same side of the key cap and the base plate. When the key cap is in a released state, the first upper shaft portion presses against the first cap wall, but the first lower shaft portion is separated from the bottom wall by a maintaining gap.
    Type: Application
    Filed: April 11, 2022
    Publication date: October 20, 2022
    Applicant: Darfon Electronics Corp.
    Inventors: Po-Chun HOU, Chin-Hung LIN
  • Patent number: 11315746
    Abstract: A method for adjusting an optical switch keyboard and an optical switch keyboard using the adjusting method are provided. The optical switch keyboard has a number of key units. The method includes the following steps. A scan signal is applied to one of a number of scan lines by a control unit at a first scan time point. A light is emitted by a light source according to the scan signal. A light emitted by the light source is detected by a detecting element to generate a detecting electric signal. The detecting electric signal is read by the control unit to obtain a first read signal voltage. When the first read signal voltage is outside the voltage range of the pressed state of the key unit, the period of the scan signal is increased by a first predetermined amount by the control unit to obtain an adjusted scan signal.
    Type: Grant
    Filed: November 13, 2020
    Date of Patent: April 26, 2022
    Assignee: Darfon Electronics Corp.
    Inventor: Chien-Hsin Lee
  • Patent number: 11290126
    Abstract: A key scanning method, a scan method for a key scan circuit, and an input device thereof are provided. The key scanning method comprises performing a first scan procedure which includes triggering a first main scan line and reading electrical signals received via a plurality of signal sensing lines to determine whether any of the keys among a first key group is triggered. Then, performing a second scan procedure which includes triggering at least one of a plurality of secondary scan lines and reading the electrical signals received via the plurality of signal sensing lines to determine whether any of the keys among a second key group is triggered. In the key scanning method, the first scan procedure and the second scan procedure are performed one after another, and each of the secondary scan lines is triggered at least once.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: March 29, 2022
    Assignees: Darfon Electronics Corp., DARFON ELECTRONICS (SUZHOU) CO., LTD.
    Inventors: Xi Sheng Chen, Te Ping Hsu
  • Publication number: 20210202193
    Abstract: A method for adjusting an optical switch keyboard and an optical switch keyboard using the adjusting method are provided. The optical switch keyboard has a number of key units. The method includes the following steps. A scan signal is applied to one of a number of scan lines by a control unit at a first scan time point. A light is emitted by a light source according to the scan signal. A light emitted by the light source is detected by a detecting element to generate a detecting electric signal. The detecting electric signal is read by the control unit to obtain a first read signal voltage. When the first read signal voltage is outside the voltage range of the pressed state of the key unit, the period of the scan signal is increased by a first predetermined amount by the control unit to obtain an adjusted scan signal.
    Type: Application
    Filed: November 13, 2020
    Publication date: July 1, 2021
    Applicant: Darfon Electronics Corp.
    Inventor: Chien-Hsin LEE
  • Patent number: 10895372
    Abstract: A light source board includes a substrate; a metal reactive layer disposed on the substrate; a metal conductive layer disposed on the metal reactive layer; a metal alloy layer disposed on the metal conductive layer; and at least one light source disposed on the metal alloy layer. A material of the metal reactive layer is a Sn—Bi type alloy or a Sn—Ag—Cu type alloy, and arrangements of materials of the metal reactive layer and the metal conductive layer are respectively an arrangement of silver paste and copper, an arrangement of silver paste and nickel, an arrangement of silver paste and silver, an arrangement of copper paste and copper, an arrangement of copper paste and nickel, or an arrangement of copper paste and silver.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: January 19, 2021
    Assignee: Darfon Electronics Corp.
    Inventors: Heng-Yi Huang, Hsin-Cheng Ho, Tsai-Yu Chen, Hung-Chuan Cheng
  • Patent number: 10727009
    Abstract: A light source board includes a substrate, a composite circuit layer on the substrate, a first protective layer on the composite circuit layer, and a plurality of light sources on the pad portions, respectively. The substrate has a long side, a first short side, and a second short side. The composite circuit layer includes a first conductive trace layer and a second conductive trace layer stacked on the first conductive trace layer. A conductivity of the second conductive trace layer is higher than a conductivity of the first conductive trace layer. The composite circuit layer has a wire portion formed of at least the first conductive trace layer and a plurality of pad portions each formed of at least the first conductive trace layer and the second conductive trace layer. The wire portion is electrically coupled to the pad portions. The first protective layer exposes the pad portions.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: July 28, 2020
    Assignee: Darfon Electronics Corp.
    Inventors: Heng-Yi Huang, Hsin-Cheng Ho, Tsai-Yu Chen, Hung-Chuan Cheng
  • Patent number: 10692663
    Abstract: A light source board includes a substrate, a composite circuit layer on the substrate, a first protective layer on the composite circuit layer, and a plurality of light sources on the pad portions, respectively. The substrate has a long side, a first short side, and a second short side. The composite circuit layer includes a first conductive trace layer and a second conductive trace layer stacked on the first conductive trace layer. A conductivity of the second conductive trace layer is higher than a conductivity of the first conductive trace layer. The composite circuit layer has a wire portion formed of at least the first conductive trace layer and a plurality of pad portions each formed of at least the first conductive trace layer and the second conductive trace layer. The wire portion is electrically coupled to the pad portions. The first protective layer exposes the pad portions.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: June 23, 2020
    Assignee: Darfon Electronics Corp.
    Inventors: Heng-Yi Huang, Hsin-Cheng Ho, Tsai-Yu Chen, Hung-Chuan Cheng
  • Publication number: 20190368706
    Abstract: A light source board includes a substrate; a metal reactive layer disposed on the substrate; a metal conductive layer disposed on the metal reactive layer; a metal alloy layer disposed on the metal conductive layer; and at least one light source disposed on the metal alloy layer. A material of the metal reactive layer is a Sn—Bi type alloy or a Sn—Ag—Cu type alloy, and arrangements of materials of the metal reactive layer and the metal conductive layer are respectively an arrangement of silver paste and copper, an arrangement of silver paste and nickel, an arrangement of silver paste and silver, an arrangement of copper paste and copper, an arrangement of copper paste and nickel, or an arrangement of copper paste and silver.
    Type: Application
    Filed: January 31, 2019
    Publication date: December 5, 2019
    Applicant: Darfon Electronics Corp.
    Inventors: Heng-Yi HUANG, Hsin-Cheng HO, Tsai-Yu CHEN, Hung-Chuan CHENG
  • Publication number: 20190371538
    Abstract: A light source board includes a substrate, a composite circuit layer on the substrate, a first protective layer on the composite circuit layer, and a plurality of light sources on the pad portions, respectively. The substrate has a long side, a first short side, and a second short side. The composite circuit layer includes a first conductive trace layer and a second conductive trace layer stacked on the first conductive trace layer. A conductivity of the second conductive trace layer is higher than a conductivity of the first conductive trace layer. The composite circuit layer has a wire portion formed of at least the first conductive trace layer and a plurality of pad portions each formed of at least the first conductive trace layer and the second conductive trace layer. The wire portion is electrically coupled to the pad portions. The first protective layer exposes the pad portions.
    Type: Application
    Filed: December 4, 2018
    Publication date: December 5, 2019
    Applicant: Darfon Electronics Corp.
    Inventors: Heng-Yi HUANG, Hsin-Cheng HO, Tsai-Yu CHEN, Hung-Chuan CHENG