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DE-102024210897-A1 - Display device and means of transport

DE102024210897A1DE 102024210897 A1DE102024210897 A1DE 102024210897A1DE-102024210897-A1

Abstract

The present invention relates to a display device (1) and a means of transportation with such a display device (1). The display device (1) has a display panel (2) with a backlight (3) for the display panel (2). The backlight (3) has a reflector (30) consisting of a plurality of modules (300, 300') with a plurality of reflectively designed cavities (31), each of the individual cavities (31) having a surrounding wall (34). A light source (32) is arranged in the respective cavities (31), wherein a reflector element (304, 304', 304") of a first module (300, 300') has an irregular division (301, 301') to an adjacent reflector element (304, 304', 304") of a second module (300, 300').

Inventors

  • Manrico Joseph

Assignees

  • AUMOVIO GERMANY GMBH

Dates

Publication Date
20260513
Application Date
20241113

Claims (10)

  1. Display device (1) with a display panel (2) and a backlight (3) for the display panel (2), wherein the backlight (3) comprises a reflector (30) consisting of a plurality of modules (300, 300') with a plurality of reflectively designed cavities (31), wherein each of the individual cavities (31) has a circumferential wall (34), wherein a light source (32) is arranged in each of the cavities (31), and wherein each module (300, 300') has a reflector element (304, 304', 304"), characterized in that a reflector element (304, 304', 304") of a first module (300, 300') has an irregular division (301, 301') to an adjacent reflector element (304, 304', 304") of a second module (300, 300') has.
  2. Display device (1) according to Claim 1 , characterized in that the irregular division (301, 301') runs between cavities (31) of the reflector elements (304, 304', 304") of the adjacent modules (300, 300').
  3. Display device (1) according to one of the previous Claims 1 or 2 , characterized in that the irregular division (301, 301') runs through cavities (31) of the reflector elements (304, 304', 304") of the adjacent modules (300, 300').
  4. Display device according to one of the previous Claims 1 until 3 , characterized in that the circumferential walls (34) of the individual cavities (31) in the area of the irregular division (301, 301') are formed by walls (34) of the cavities (31) of the reflector element (304, 304', 304") of the first module (300, 300') and by adjacent walls (34) of the cavities (31) of the reflector element (304, 304', 304") of the second module (300, 300').
  5. Display device (1) according to one of the previous Claims 1 until 4 , characterized in that walls (34) of the reflector elements (304, 304', 304") of the adjacent modules (300, 300') are designed to overlap in the area of the irregular division (301, 301').
  6. Display device (1) according to one of the previous Claims 1 until 5 , characterized in that reflector elements (304, 304', 304") of the adjacent modules (300, 300') have a joint in the area of the irregular division (301, 301') between the walls (34) of the cavities (31).
  7. Display device (1) according to one of the previous Claims 1 until 6 , characterized in that the modules (300) are snapped, screwed, glued or riveted to a support element (70).
  8. Display device (1) according to one of the previous Claims 1 until 7 , characterized in that the walls (34) of the cavities (31) are rounded and the cavities (31) are designed to reflect the light (L) emitted by the light sources (32) in the direction of the display panel (2).
  9. Display device (1) according to one of the previous Claims 1 until 8 , characterized in that the walls (34) of the cavities (31) are planar and the cavities (31) are designed to reflect the light (L) emitted by the light sources (32) in the direction of the display panel (2).
  10. Means of transport (20) with a display device (1) according to one of the previous Claims 1 until 9 .

Description

The present invention relates to a display device comprising a display panel and a backlight for the display panel, as well as a means of transportation with such a display device. Such display devices are used today in almost every means of transportation, for example, a motor vehicle. The number and size of display devices in vehicles are constantly increasing. Display devices can be found, for example, as instrument clusters for the driver, central displays, and passenger displays. Non-self-illuminating transmissive displays require backlighting for image display. The purpose of the backlighting is to illuminate the display panel as evenly as possible across its entire active area, in order to create a homogeneous display right to the edges. Matrix backlights utilize a multitude of light sources arranged in a matrix to generate light. A reflector directs the light from these sources towards the display panel. Display devices with a display panel and a backlight for the display panel are known to those skilled in the art in various embodiments. For example, [reference to relevant text] describes DE 10 2022 205 566 A1 A display device and a means of transport with such a display device. The display device comprises a display panel and a backlight for the display panel. The backlight comprises a reflector consisting of a plurality of modules with a plurality of reflectively designed cavities and a plurality of light sources arranged in each of the cavities. US 2018/372300 A1 This describes a display device with a display panel and a backlight for the display panel. The backlight comprises a reflector consisting of a plurality of modules with a plurality of reflectively designed cavities and a plurality of light sources arranged in each cavity. The reflector, which consists of several reflector elements, has a regular, linear division. A first reflector element, comprising a plurality of first cavities and a first overlapping section, is arranged to overlap a section of the backlight, with each of the plurality of first cavities being located at a position corresponding to a relevant first light source, and the first overlapping section being located along an outer edge of the first reflector element. A second reflector element, comprising a plurality of second cavities and a second overlap section, is arranged to also overlap a section of the backlight, with each of the plurality of second cavities being provided at a position corresponding to a relevant plurality of second light sources, and the second overlap section being provided along an outer edge of the second reflector element and overlapping the first overlap section of the first reflector element. As the size of display devices increases, so does the size of the backlight, along with the number of reflector elements required. Such large backlights typically consist of multiple modules, each containing a reflector element. The individual reflector elements of each module are linearly divided in the overlapping area with an adjacent module to ensure precise manufacturing and alignment with each other and with the light sources arranged in the cavities. High-precision manufacturing and alignment are complex and therefore expensive. Less effort and lower costs can be achieved through less precise manufacturing and alignment. A disadvantage of this design is that the linear division of the reflector creates an optical loss in the form of a dark line between adjacent reflector elements in the overlap area between the individual modules, resulting in a local reduction in brightness. This reduction is attempted to be compensated for by adjusting the brightness of the individual light sources in the area of the division. However, even after this compensation, the viewer of the display still perceives a dark line in the area of the linear division of the reflector elements in the overlap area between the individual modules. The present invention is based on the objective of providing an improved display device with a backlight and a means of transport with such a display device, without an optical loss with a local reduction in brightness and a dark line visible to the viewer in the overlap. The area of the individual reflector elements between the adjacent modules is created. This problem is solved according to the invention by a display device according to the preamble of independent claim 1 together with the features of the characterizing part of independent claim 1 and by a means of propulsion according to claim 10. Advantageous embodiments of the invention are the subject of the dependent claims. The invention provides a display device with a display panel and a backlight for the display panel, wherein the backlight comprises a reflector consisting of a plurality of modules with a plurality of reflectively designed cavities, wherein each of the individual cavities has a circumferential wall, wherein a light source is arranged in each of the cavities, a