CN205692497U - A kind of view-based access control model persists the bore hole holographic display of effect - Google Patents

Abstract

The utility model discloses a kind of view-based access control model and persist the bore hole holographic display of effect, including multiple LED lamp bar and rotating disk, the inner of multiple LED lamp bar is fixing with rotating disk to be connected, multiple LED lamp bar are uniformly distributed along the center of rotation of rotating disk, LED lamp bar includes that lamp stand and RGB lamp bead, multiple RGB lamp bead are that line style is fixed on lamp stand；The step of its display packing is followed successively by and determines viewing area and resolution；Calculate rotation period；Calculate refresh time；Display picture data processes；This utility model utilizes the principle of " the point is moved into a line; line moves into face ", RGB lamp bead is arranged in the form of a line, and form a track plane according to certain track motion, according to the phase vegetarian refreshments (RGB lamp bead) lighted needed for picture corresponding to track plane, it is possible to display picture, by then passing through the motion of lamp bar, the screen theme of display out, is floated and shows among real environment by the track plane " thoroughly " that the background of reality can be moved by lamp bar.

Description

A kind of view-based access control model persists the bore hole holographic display of effect

Technical field

This utility model relates to a kind of LED and shows field, particularly relates to a kind of view-based access control model and persists the bore hole holography of effect Display device.

Background technology

Due to the development of LED technology, and distinctive advantage, low cost, life-span length, highly high, LED is by extensively Be applied to illumination, the aspect such as display.

In terms of light-emitting diode display, current domestic existing light-emitting diode display, is based on plane, by colorful lamp bead, i.e. RGB tri- Individual LED concentrates on a closing, arranges by matrix form, by line by line or interleaved form, is shown by picture.Mainly It is applied to giant display, outdoor advertising etc..

Along with the development of 3D technology, mainly by principle of parallax, when beholder watches picture, as long as providing shooting position Put the two a series of paintings images somewhat staggered, watch for right and left eyes respectively, cause the difference of the depth of field, just it can be seen that one group has solid The picture of sense.The existing method realizing principle of parallax mainly has color separation, light splitting, timesharing and grating etc..

Existing 3D Display Technique, by being then based on plane, is arranged in a matrix lamp bead in plane, the theme of display and the back of the body Scape is placed in same plane, and the theme of display cannot be completely disposed at the background of reality, say, that original 3D Display Technique, All the time having display background, display background is the background of a kind of reality residing for the background of former video pictures rather than display.

Utility model content

The purpose of this utility model is that provides a kind of view-based access control model to persist the naked of effect to solve the problems referred to above Eye holographic display.

This utility model is achieved through the following technical solutions above-mentioned purpose:

A kind of view-based access control model persists the bore hole holographic display of effect, including multiple LED lamp bar and rotating disk, multiple Inner and the described rotating disk of described LED lamp bar is fixing to be connected, and multiple described LED lamp bar are equal along the center of rotation of described rotating disk Even distribution, described LED lamp bar includes that lamp stand and RGB lamp bead, multiple described RGB lamp bead are that line style is fixed on described lamp stand.

Specifically, described rotating disk arranging speed probe, the front side of described LED lamp bar is provided with light sensor.

The beneficial effects of the utility model are:

A kind of view-based access control model of this utility model persist effect bore hole holographic display utilize " the point is moved into a line, line moves into Face " principle, RGB lamp bead is arranged in the form of a line, and according to certain track motion formed a track plane, needed for picture Light the phase vegetarian refreshments (RGB lamp bead) corresponding to track plane, it is possible to display picture, by then passing through the motion of lamp bar, the back of the body of reality The screen theme of display out, is floated and shows among the environment of reality, and reach by the track plane " thoroughly " that scape can be moved by lamp bar Display effect to a kind of 3D.

Accompanying drawing explanation

Fig. 1 is the structural representation that a kind of view-based access control model described in the utility model persists the bore hole holographic display of effect Figure.

Detailed description of the invention

The utility model is described in further detail below in conjunction with the accompanying drawings:

As it is shown in figure 1, a kind of view-based access control model of this utility model persists the bore hole holographic display of effect, including multiple LED lamp bar 2 and rotating disk 1, the inner of multiple LED lamp bar 2 is fixing with rotating disk 1 to be connected, and multiple LED lamp bar 2 are along rotating disk 1 Center of rotation is uniformly distributed, and LED lamp bar 2 includes that lamp stand and RGB lamp bead 3, multiple RGB lamp bead 3 are fixed on lamp stand in line style.

Determine viewing area and resolution: determine the length of LED lamp bar, and be mounted in rotating disk；

Viewing area: S=π m², resolution: P=mn π

In formula, m is the length of LED lamp bar, and in LED lamp bar, the distributive law of RGB lamp bead is n/ rice.

Calculate rotation period: calculate the rotation period of rotating disk according to the length of LED lamp bar and the quantity of LED lamp bar；

Forming the rotational angle of an each LED lamp bar of width picture: α=360/N, unit is degree

Rotating speed:Unit is revolutions per second；

In formula: 1/24 produces the maximum duration of persistence of vision for human eye.

Calculate refresh time: calculate the refreshing frequency of RGB lamp bead according to the length of LED lamp bar and the quantity of LED lamp bar；

Determine the number of the arrangement of RGB lamp bead on the circular arc at the maximum line velocity of LED lamp bar:

$M=\frac{1/N\×2\mathrm{\π}m}{r}$

Refresh time is:Unit is the second；

In formula: r is the diameter of RGB lamp bead.

Display picture data processes: obtain the gray scale needed for each RGB lamp bead and chrominance information, and according to the information obtained Light RGB lamp bead to realize picture and show.

A: by chrominance information acquisition gray value:

Obtain formula: Gray=R × 0.299+G × 0.587+B × 0.114

For avoiding the floating-point operation of low speed, it being carried out integer arithmetic, scale it 1000 times, RGB is generally 8 simultaneously Precision, is therefore 32 integer calculations, it is therefore desirable to add 500 realizations and round up, obtain integer calculations formula: Gray=(R × 299+G×587+B×144+500)/1000

Carry out mutation, be simplified after formula: Gray=(R × 30+G × 59+B × 11+50)/100 extracts gray value, Calculate three RGB gray values of RGB lamp bead at each pixel,

R:G:B ≈ 3:6:1, by controlling each LED current value so that it is meet above formula, can be by each phase vegetarian refreshments Chroma data can be applied directly in the gradation data of each LED.

In 24 chromatic graph sheets, each phase vegetarian refreshments accounts for 3 byte datas, and RGB respectively accounts for a byte, corresponds to show gray scale In data, being also each lamp bead data of accounting for 3 bytes, RGB respectively accounts for a byte.

B: determine the gray scale display information of each lamp bead

Determine the gray scale of each pixel in display picture, i.e. corresponding rectangular coordinate (x, y),

Being converted by coordinate system, (x y) and changes between the polar coordinate (ρ, θ) of lamp bar and closes the rectangular coordinate of acquisition picture System:

Conversion formula is

Draw: x=ρ × cos (θ × (2 π/360))

Y=ρ × sin (θ × (2 π/360))

The row-coordinate of display picture each phase vegetarian refreshments in the middle of x: plane coordinate system；In the middle of y: plane coordinate system, display picture is every The row coordinate of individual phase vegetarian refreshments；

The required angle rotated of size of C: acquisition one RGB lamp bead of displacement:

$\mathrm{\β}=\frac{r}{1/N\×2\mathrm{\π}m}\×360$

It addition, the structure of LED lamp bar can be the polymorphic structure such as M shape, I shape in this utility model.

The technical solution of the utility model is not limited to the restriction of above-mentioned specific embodiment, every according to skill of the present utility model The technology deformation that art scheme is made, within each falling within protection domain of the present utility model.

Claims (2)

1. a view-based access control model persists the bore hole holographic display of effect, it is characterised in that: include multiple LED lamp bar and rotation Dish, the inner and described rotating disk of multiple described LED lamp bar is fixing to be connected, and multiple described LED lamp bar are along the rotation of described rotating disk Turning center to be uniformly distributed, described LED lamp bar includes that lamp stand and RGB lamp bead, multiple described RGB lamp bead are that line style is fixed on described lamp On bar.

A kind of view-based access control model the most according to claim 1 persists the bore hole holographic display of effect, it is characterised in that: institute Stating and arrange speed probe in rotating disk, the front side of described LED lamp bar is provided with light sensor.