Light-emitting displays with printed light-altering structures
A technology of light-emitting display and printing institute, applied in the field of printing light-changing structure system, which can solve the problems of increasing the complexity and cost of the manufacturing process
Active Publication Date: 2021-06-22
ELUX INC
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Problems solved by technology
Typically, these light and color-altering layers must be formed in a separate substrate attached to the light-emitting substrate, adding complexity and expense to the overall manufacturing process
Method used
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[0023] Figure 1A and Figure 1B is a partial cross-sectional view of a multicolor light-emitting display. The display 100 includes a light emitting substrate 102 which in turn includes a top surface 104 and a plurality of wells formed on the top surface of the light emitting substrate, see Figure 1A . The figure shows well 106-0, well 106-1 and well 106-n, which may include red-green-blue (RGB) pixels. It will be appreciated that a pixel may contain more than three colors (sub-pixels), and that large light-emitting displays may consist of millions of such pixels. A matrix of column traces and row conductive traces forms a plurality of first column / row intersections, where each column / row intersection is associated with a respective one of the wells. Figure shows column trace 108a, run trace 110-0, run trace 110-1, and run trace 110-n associated with column / row intersections 112-0, 112-1, and 112-n (dashed lines) . A plurality of light emitting elements 114 are located in...
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Abstract
A multicolor light-emitting display with printed light-altering structures is provided. A manufacturing method provides a light emitting substrate having a plurality of wells formed on a top surface thereof and a plurality of light emitting elements residing in the plurality of wells. The method prints a light altering structure overlying a light emitting element. Some examples of light-altering materials include light-scattering materials, fluorescent materials, and quantum dots. In one aspect, a well of a light emitting substrate has a first shape, sidewalls and a first perimeter. Similarly, the light emitting element has a first shape, a side, and a second perimeter that is smaller than the first perimeter. The light-altering structure fills the space between the sides of the light-emitting element and the sidewalls of the well with a light-altering material. If the first shape is a circle, the method prints a circular light altering structure overlying the light emitting element, the circle having a first diameter defined by the sidewalls of the well.
Description
technical field [0001] The present invention relates generally to light-emitting displays, and more particularly to a system and method for printing light-altering structures on light-emitting displays fabricated by placing micro-light emitting elements in wells of a substrate. Background technique [0002] Red-green-blue (RGB) displays can be made using tiny light emitting elements such as micro light emitting diodes (μLEDs). Such displays may be used in televisions, computer monitors or handheld devices. Miniature light-emitting elements may have a diameter or cross-section of less than 100 microns. The light emitting elements are aligned in some way into the pixel array. Conventional processing and integration steps after placement of the light-emitting elements include metallization to connect the light-emitting elements to the matrix of control lines. [0003] If the display is fabricated using a fluidic fabrication process, the light-emitting (light-generating) subs...
Claims
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IPC IPC(8): G09F9/33G09F9/302
CPCG09F9/302G09F9/33H01L27/156H01L33/04H01L33/50
Inventor 葛特鄂孟李宗霑佐佐木健司保罗·约翰·舒勒
Owner ELUX INC