Display device

{
  "publication_number": "US9396686B2",
  "country": "US",
  "kind": "B2",
  "title": "Display device",
  "abstract": "A display device includes a display panel body that has a display surface emitting light, and a brightness sensor unit that is fixed on the display surface of the display panel body and includes a brightness sensor detecting a brightness of the light from the display surface.",
  "claims": [
    "1. A display device comprising: a display panel body that has a display surface emitting light; and a brightness sensor unit that is fixed on the display surface of the display panel body, wherein the brightness sensor unit includes: a brightness sensor detecting a brightness of the light from the display surface; and a sensor holder comprising a light transmissive material, the sensor holder includes: an adhesion surface adhered to the display surface of the display panel body; and a light diffusing portion diffusing the light from the display surface, the brightness sensor is fixed to a position facing the display surface with sandwiching the light diffusing portion of the sensor holder between the brightness sensor and the display surface, wherein the sensor holder includes a base portion in which a housing cavity housing the brightness sensor is formed, and the light diffusing portion is provided on an inner surface of the housing cavity, the inner surface opposing the brightness sensor.",
    "2. The display device according to claim 1, wherein the light diffusing portion comprises a surface opposing the adhesion surface, and the surface of the diffusing portion comprises irregularities.",
    "3. The display device according to claim 1, wherein the light diffusing portion comprises a light diffusing member that contains a light diffusing material.",
    "4. The display device according to claim 1, wherein the sensor holder is separate from a frame and a bezel provided at an outer periphery of the display panel body.",
    "5. The display device according to claim 1, wherein the brightness sensor is connected, via a flexible cable, to a brightness control portion that performs brightness adjustment of the display panel body."
  ],
  "description_excerpt": "The present invention relates to the display unit which includes a brightness sensor that detects the luminance of a display panel.\n\nSome display devices that are utilized as monitors of various electronic devices have a function that automatically adjusts the brightness of the display surface. Such a display device detects the brightness of the display surface with a brightness sensor, and a controller automatically controls, based on the detected brightness, a drive circuit of the display surface so as to put the brightness of the display surface in a preset range.\n\nIn the display device, a display panel that includes a liquid crystal display panel or the like and a drive circuit that drives the display panel are housed in a housing of the display device. An opening that exposes the display surface of the display panel is formed in the housing, and a frame that blocks the gap between the outer periphery of the display panel and the housing is provided at the opening.\n\nFor example, Patent Document 1 discloses a display device in which a brightness sensor is installed on a frame that is positioned at the outer periphery of the display surface. Thereby, the brightness sensor detects the brightness of a specified position where a display pattern for brightness detection is displayed on the display surface.\n\nHowever, relative displacement (shifting) between the display panel and the frame that is provided at the opening portion of the housing can occur due to heat that is produced during driving of the display panel and temperature changes based on the external environment, as well as vibration that is applied from outside.",
  "cpc": [
    "G09G 3/3406",
    "G09F 13/005",
    "G09G 2320/0626",
    "G09G 2320/0633",
    "G09G 2360/145"
  ],
  "ipc": [
    "G09G 3/34",
    "G09F 13/00"
  ],
  "assignees": [
    "NEC Display Solutions Ltd"
  ],
  "inventors": [
    "Tadayuki Ito",
    "Yoshihito Mochizuki",
    "Naoki Itakura",
    "Yasuki Sato",
    "Kiyofumi Natori"
  ],
  "filing_date": "2012-01-04",
  "publication_date": "2016-07-19",
  "grant_date": "2016-07-19",
  "priority_date": "2012-01-04",
  "application_number": "US-201214368841-A",
  "family_id": "48745072",
  "cited_by_count": 1,
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}