# US 11,908,357 B2 · POV display device and control method therefor

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- Number: US 11,908,357 B2
- Document ID: US11908357B2
- Status: Granted
- Kind: B2
- Application number: 17/916,915
- Filed: 2020-04-23
- Published: 2023-05-18
- Granted: 2024-02-20
- Earliest claimed: 2020-04-23
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Kyungho Lee; Jaewoon Lee; Eungdoo Kim
- Web page: https://patentgrep.com/patent/US11908357B2

## CPC

- G09G 3/005: {forming an image using a quickly moving array of imaging elements, causing the human eye to perceive an image which has a larger resolution than the array, e.g. an image on a cylinder formed by a rotating line of LEDs parallel to the axis of rotation}
- G02F 1/1336: {Illuminating devices}
- G09G 5/005: {Adapting incoming signals to the display format of the display terminal}
- H10W 90/00: Package configurations
- G09G 2360/12: Frame memory handling
- G09G 2360/127: Updating a frame memory using a transfer of data from a source area to a destination area
- G09G 2370/10: Use of a protocol of communication by packets in interfaces along the display data pipeline
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

The present invention provides a persistence of vision (POV) display device using a light emitting element, the display device comprising: a fixed module including a motor; a rotating module located on the fixed module and rotated by the motor; at least one panel coupled to the rotating module; a plurality of light sources arranged on the panel and having a plurality of pixels; a light source module including a light emitting element array in which the plurality of light sources are arranged in a longitudinal direction; memory that stores video data received from an external source device; and a controller that controls the order of input of the video data and the order of output of the video data.

## Claims

### Claim 1

A persistence of vision (POV) display device comprising:
a fixed module including a motor;
a rotatable module positioned on the fixed module and configured to be rotated by the motor;
at least one panel coupled to the rotatable module;
a plurality of light sources arranged on the panel and constituting a plurality of pixels;
a light source including a light emitting element array having the plurality of light sources arranged in a longitudinal direction;
a memory configured to store video data received from an external source device; and
a controller,
wherein the panel includes a plurality of panels and the memory includes a plurality of memories, and the controller is configured to:
receive video data from an external source device, the video data comprised of a plurality of video frames,
based on a number of the plurality of panels and a display order of the plurality of panels, divide the video data by dividing individual video frames of the video data to create a plurality of video frame portions for each video frame,
wherein a number plurality of video frame portions for each video frame is equal to the number of the plurality of panels,
for all video frames of the divided video data, controllably input the respective plurality of video frame portions into respective ones of the plurality of memories in parallel with each other or in data packet units,
for all video frames of the divided video data, controllably output the respective plurality of video frame portions from respective ones of the plurality of memories,
wherein, for all video frames of the divided video data, an order in which the divided data are input to the memory and an order in which the divided data are output from the memory is controlled so as to allow an image to be converted only at a time point of frame conversion.

### Claim 2

A method for controlling a persistence of vision (POV) display device, wherein the POV display device includes a fixed module including a motor, a rotatable module positioned on the fixed module and configured to be rotated by the motor, at least one panel coupled to the rotatable module, a plurality of light sources arranged on the panel and constituting a plurality of pixels, a light source including a light emitting element array having the plurality of light sources arranged in a longitudinal direction, a memory configured to store video data received from an external source device, and a controller, wherein the panel includes a plurality of panels and the memory includes a plurality of memories, the method comprising:
receiving video data from an external source device, the video data comprised of a plurality of video frames;
based on a number of the plurality of panels and a display order of the plurality of panels, dividing the video data by dividing individual video frames of the video data to create a plurality of video frame portions for each video frame,
wherein a number plurality of video frame portions for each video frame is equal to the number of the plurality of panels;
for all video frames of the divided video data, controllably inputting the respective plurality of video frame portions into respective ones of the plurality of memories in parallel with each other or in data packet units; and
for all video frames of the divided video data, controllably outputting the respective plurality of video frame portions from respective ones of the plurality of memories,
wherein, for all video frames of the divided video data, an order in which the divided data are input to the memory and an order in which the divided data are output from the memory is controlled so as to allow an image to be converted only at a time point of frame conversion.