Patents by Inventor Ching-Tai Cheng

Ching-Tai Cheng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11815762
    Abstract: A backlight module is provided. The backlight module includes a substrate having a substrate surface, a conductive layer disposed on the substrate surface, a plurality of LED chips disposed on and electrically connected to the conductive layer, a light-permeable layer having a light-permeable surface away from the substrate surface, and a pattern layer disposed on the light-permeable surface and having a plurality of first patterns corresponding to and respectively located above the plurality of LED chips. Wherein, each first pattern has a maximum width. A maximum width of one first pattern satisfies the following formula: WP?2n(TE?TL)(1?1/n2)1/2+WL; wherein WP is the maximum width of one first pattern, n is a refractivity of the light-permeable layer, TE is a thickness of the light-permeable layer, TL is a thickness of the LED chip, WL is a maximum width of LED chip corresponding to the first pattern.
    Type: Grant
    Filed: November 30, 2022
    Date of Patent: November 14, 2023
    Assignees: EPISTAR CORPORATION, Yenrich Technology Corporation
    Inventors: Wen-Chien Wu, Wei-Shan Hu, Ching-Tai Cheng
  • Publication number: 20230343894
    Abstract: A pixel package includes a carrier, a first light-emitting unit, a second light emitting unit, a reflective layer, and a light-absorbing layer. The carrier has a top surface and a conductive layer. The first light-emitting unit and the second light-emitting unit are arranged on the conductive layer and have a light-emitting surface and a side surface respectively. The reflective layer is arranged on the top surface and contacts the conductive layer. The light-absorbing layer is arranged on the reflective layer and contacts the first side surface and the second side surface while exposing the first light-emitting surface and the second light-emitting surface. In a cross-sectional view, the light-absorbing layer has a first thickness and a second thickness between the first side surface and the second side surface. The first thickness is farther away from and the first side surface than the second thickness, and is smaller than the second thickness.
    Type: Application
    Filed: April 25, 2023
    Publication date: October 26, 2023
    Applicant: EPISTAR CORPORATION
    Inventors: Chao Chi TU, Chung Che DAN, Wei Shan HU, Ching Tai CHENG
  • Patent number: 11764328
    Abstract: The light-emitting diode package includes a plurality of bumps being a couple corresponding to each other. Each of the bumps has a first part and a second part placed under the first part, and a gap is formed between the bumps in a period-repeating wriggle shape or an irregular wriggle shape. Accordingly, the distance between the bumps of the light-emitting diode package is small, which results in a less stress being concentrated at the space between the bumps, as a result, a crack is difficultly caused by the stress to the light-emitting diode package, in other words, the structural strength between the bumps and the covering part is enhanced. Still, while being manufactured, the yield rate of the light-emitting diode package is also improved since there is almost no crack to reduce the yield rate.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: September 19, 2023
    Assignee: EPISTAR CORPORATION
    Inventors: Ying-Yong Su, Hsin-Mao Liu, Wei-Shan Hu, Ching-Tai Cheng
  • Publication number: 20230207540
    Abstract: A light-emitting device includes a circuit carrier board having a short side and a long side, a plurality of light-emitting units on the circuit carrier board for emitting three or more color lights, and a light-transmitting glue layer on the circuit carrier board and covering the plurality of light-emitting units. The short side is shorter than the long side. The plurality of light-emitting units include a first light-emitting unit. The first light-emitting unit has a light exit surface, a first sidewall, and a second sidewall. The first sidewall faces the short side and has a first included angle with the light exit surface, and the second sidewall faces the long side and has a second included angle with the light exit surface. The first included angle is between 85 to 95 degrees, and the second included angle is less than 85 degrees or greater than 105 degrees.
    Type: Application
    Filed: December 15, 2022
    Publication date: June 29, 2023
    Inventors: Min-Hsun HSIEH, Hsin-Mao LIU, Tzu-Hsiang WANG, Ya-Wen LIN, Chi-Chih PU, Hsiao-Pei CHIU, Ching-Tai CHENG, Chong-Yu WANG
  • Publication number: 20230176417
    Abstract: A backlight module is provided. The backlight module includes a substrate having a substrate surface, a conductive layer disposed on the substrate surface, a plurality of LED chips disposed on and electrically connected to the conductive layer, a light-permeable layer having a light-permeable surface away from the substrate surface, and a pattern layer disposed on the light-permeable surface and having a plurality of first patterns corresponding to and respectively located above the plurality of LED chips. Wherein, each first pattern has a maximum width. A maximum width of one first pattern satisfies the following formula: WP?2n(TE?TL)(1?1/n2)1/2+WL; wherein WP is the maximum width of one first pattern, n is a refractivity of the light-permeable layer, TE is a thickness of the light-permeable layer, TL is a thickness of the LED chip, WL is a maximum width of LED chip corresponding to the first pattern.
    Type: Application
    Filed: November 30, 2022
    Publication date: June 8, 2023
    Inventors: Wen-Chien WU, Wei-Shan HU, Ching-Tai CHENG
  • Publication number: 20230161196
    Abstract: A display device includes a first light-emitting module and a second light-emitting module. Each light-emitting module has a substrate, a plurality of LED dies arranged on the substrate, a reflective layer on the substrate, and a light-transmissive layer. The light-transmissive layer covers the substrate, the plurality of LED dies, and the reflective layer. Both the light-transmissive layer of the first module and the light-transmissive layer of the second module have rough uppermost surfaces. The first light-emitting module has a first reflectivity, the second light-emitting module has a second reflectivity, and a standard deviation between the first reflectivity and the second reflectivity is not greater than 0.5.
    Type: Application
    Filed: November 17, 2022
    Publication date: May 25, 2023
    Inventors: Chong-Yu WANG, Ching-Tai CHENG, Wei-Shan HU
  • Patent number: 11545600
    Abstract: A LED package comprises an LED chip, a reflective structure which encloses the LED chip, a wavelength conversion structure placed on the LED chip, and an absorbing structure which encloses or is placed on the reflective structure.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: January 3, 2023
    Assignee: EPISTAR CORPORATION
    Inventors: Tsung-Hong Lu, Pao-Yu Liao, Ching-Tai Cheng
  • Publication number: 20220328734
    Abstract: A light-emitting device comprises a light-emitting element, a covering structure, a quantum dot material block, and an adhesive structure is disclosed. The covering structure has a depressed part. The quantum dot material block is filled into the depressed part and enclosed by the light-emitting element and the covering structure. The light-emitting element, the covering structure, and the quantum dot material block are bonded together through the adhesive structure. Since the quantum dot material block is enclosed by the covering structure and the light-emitting element, the outer moisture and oxygen are blocked by the covering structure and the light-emitting element from the quantum dot material block, the decreasing emitting efficiency of the quantum dot material is further alleviated.
    Type: Application
    Filed: June 27, 2022
    Publication date: October 13, 2022
    Inventors: Tsung-Hong LU, Ching-Tai CHENG
  • Publication number: 20220302357
    Abstract: This disclosure discloses a light-emitting element having a light-emitting unit, a transparent layer and a wavelength conversion layer formed on the transparent layer. The transparent layer covers the light-emitting unit.
    Type: Application
    Filed: June 7, 2022
    Publication date: September 22, 2022
    Inventors: Ching-Tai CHENG, Ju-Lien KUO, Min-Hsun HSIEH, Shau-Yi CHEN, Shih-An LIAO, Jhih-Hao CHEN
  • Patent number: 11380824
    Abstract: The application discloses a light-emitting device including a carrier, a light-emitting element and a connecting structure. The carrier includes a first connecting portion and a first necking portion extended from the first connecting portion. The first connecting portion has a first width, and the first necking portion has a second width. The second width is less than the first width. The light-emitting element includes a first light-emitting layer being able to emit a first light and a first contacting electrode formed under the first light-emitting layer. The first contacting electrode is corresponded to the first connecting portion. The connecting structure includes a first electrical connecting portion and a protecting portion surrounding the first electrical connecting portion. The first electrical connecting portion is electrically connected to the first connecting portion and the first contacting electrode.
    Type: Grant
    Filed: August 11, 2020
    Date of Patent: July 5, 2022
    Assignee: EPISTAR CORPORATION
    Inventors: Ching-Tai Cheng, Shau-Yi Chen, Yih-Hua Renn, Wei-Shan Hu, Pei-Hsuan Lan
  • Patent number: 11374154
    Abstract: A light-emitting device comprises a light-emitting element, a covering structure, a quantum dot material block, and an adhesive structure is disclosed. The covering structure has a depressed part. The quantum dot material block is filled into the depressed part and enclosed by the light-emitting element and the covering structure. The light-emitting element, the covering structure, and the quantum dot material block are bonded together through the adhesive structure. Since the quantum dot material block is enclosed by the covering structure and the light-emitting element, the outer moisture and oxygen are blocked by the covering structure and the light-emitting element from the quantum dot material block, the decreasing emitting efficiency of the quantum dot material is further alleviated.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: June 28, 2022
    Assignee: EPISTAR CORPORATION
    Inventors: Tsung-Hong Lu, Ching-Tai Cheng
  • Patent number: 11355723
    Abstract: A light-emitting device includes a light-emitting element having a first electrode and a second electrode, a carrier, a first contact and a second contact. The first contact is arranged on the carrier and is electrically connected to the first electrode. The second contact is arranged on the carrier and is electrically connected to the second electrode. The first contact has a contour similar with that of the first electrode. The second contact has a contour similar with that of the second electrode.
    Type: Grant
    Filed: September 14, 2020
    Date of Patent: June 7, 2022
    Assignee: EPISTAR CORPORATION
    Inventors: Yih-Hua Renn, Shau-Yi Chen, Ching-Tai Cheng, Aurelien Gauthier-Brun
  • Patent number: 11355677
    Abstract: A light-emitting element having a light-emitting unit, a transparent layer and a wavelength conversion layer formed on the transparent layer. The transparent layer covers the light-emitting unit. The wavelength conversion layer includes a phosphor layer having a phosphor and a stress release layer without the phosphor.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: June 7, 2022
    Assignee: EPISTAR CORPORATION
    Inventors: Ching-Tai Cheng, Ju-Lien Kuo, Min-Hsun Hsieh, Shau-Yi Chen, Shih-An Liao, Jhih-Hao Chen
  • Publication number: 20210083159
    Abstract: A light-emitting device includes a light-emitting element, an electrode, a reflective layer and a transparent layer. The reflective layer surrounds the light-emitting element and has an inner surface including a first portion and a second portion. There is a first angle included between the first portion and the first lateral surface, there is a second angle included between the second portion and the first lateral surface, and the first angle is larger than the second angle. The transparent layer includes an outer portion and an inner portion. The outer portion is formed above the upper surface and the inner portion is formed between the reflective layer and the first lateral surface. The outer portion includes wavelength conversion material and the inner portion does not comprise the wavelength conversion material.
    Type: Application
    Filed: November 25, 2020
    Publication date: March 18, 2021
    Inventors: Pei-Hsuan LAN, Ching-Tai CHENG
  • Publication number: 20210050478
    Abstract: The light-emitting diode package includes a plurality of bumps being a couple corresponding to each other. Each of the bumps has a first part and a second part placed under the first part, and a gap is formed between the bumps in a period-repeating wriggle shape or an irregular wriggle shape. Accordingly, the distance between the bumps of the light-emitting diode package is small, which results in a less stress being concentrated at the space between the bumps, as a result, a crack is difficultly caused by the stress to the light-emitting diode package. In other words, the structural strength between the bumps and the covering part is enhanced. Still, while being manufactured, the yield rate of the light-emitting diode package is also improved since there is almost no crack to reduce the yield rate.
    Type: Application
    Filed: August 13, 2019
    Publication date: February 18, 2021
    Inventors: Ying-Yong SU, Hsin-Mao LIU, Wei-Shan HU, Ching-Tai CHENG
  • Publication number: 20210013443
    Abstract: A light-emitting device includes a light-emitting element having a first electrode and a second electrode, a carrier, a first contact and a second contact. The first contact is arranged on the carrier and is electrically connected to the first electrode. The second contact is arranged on the carrier and is electrically connected to the second electrode. The first contact has a contour similar with that of the first electrode. The second contact has a contour similar with that of the second electrode.
    Type: Application
    Filed: September 14, 2020
    Publication date: January 14, 2021
    Inventors: Yih-Hua Renn, Shau-Yi Chen, Ching-Tai Cheng, Aurelien Gauthier-Brun
  • Patent number: 10862011
    Abstract: A light-emitting device includes a light-emitting element and a wavelength conversion layer. The light-emitting element has a top surface, a bottom surface, a side surface, and a first electrical contact formed on the bottom surface. The distance between the top surface and the bottom surface has a first height (h1). The wavelength conversion layer has a first area (A1) located on the top surface of the light-emitting element and a second area (A2) located on the side surfaces and surrounding the first area. The first area has a second height (h2). The second area has a third height (h3) and a second width (w2). The second height (h2) is greater than the second width (w2). The difference of the third height and the sum of the first height and the second height is less than 15 ?m.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: December 8, 2020
    Assignee: EPISTAR CORPORATION
    Inventors: Yih-Hua Renn, Ching-Tai Cheng, Chun-Hua Shih
  • Publication number: 20200373468
    Abstract: The application discloses a light-emitting device including a carrier, a light-emitting element and a connecting structure. The carrier includes a first connecting portion and a first necking portion extended from the first connecting portion. The first connecting portion has a first width, and the first necking portion has a second width. The second width is less than the first width. The light-emitting element includes a first light-emitting layer being able to emit a first light and a first contacting electrode formed under the first light-emitting layer. The first contacting electrode is corresponded to the first connecting portion. The connecting structure includes a first electrical connecting portion and a protecting portion surrounding the first electrical connecting portion. The first electrical connecting portion is electrically connected to the first connecting portion and the first contacting electrode.
    Type: Application
    Filed: August 11, 2020
    Publication date: November 26, 2020
    Inventors: Ching-Tai CHENG, Shau-Yi CHEN, Yih-Hua RENN, Wei-Shan HU, Pei-Hsuan LAN
  • Patent number: 10825970
    Abstract: An embodiment of present disclosure discloses a light-emitting device which includes a light-emitting unit, a transparent covering structure, a first reflective structure, a second reflective structure, and a wavelength conversion structure. The light-emitting unit includes a light-emitting surface, a bottom surface opposite to the light-emitting surface, a side surface, a first conductive electrode, and a second conductive electrode. The first conductive electrode and the second conductive electrode are located on the bottom surface. The transparent covering structure covers the light-emitting surface and the side surface. The first reflective structure surrounds the transparent covering structure. The second reflective structure is disposed under the first reflective structure and surrounds the first conductive electrode and the second conductive electrode. The wavelength conversion structure is disposed on the first reflective structure and the transparent covering structure.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: November 3, 2020
    Assignee: Epistar Corporation
    Inventors: Min-Hsun Hsieh, Ming-Chi Hsu, Ching-Tai Cheng, Yu-Hsi Sung, Lung-Kuan Lai, Yih-Hua Renn
  • Patent number: D975664
    Type: Grant
    Filed: August 6, 2020
    Date of Patent: January 17, 2023
    Assignee: EPISTAR CORPORATION
    Inventors: Wei-Shan Hu, Ching-Tai Cheng, Pei-Hsuan Lan