CN206163104U - Peep -proof display device and peep -proof display - Google Patents
Peep -proof display device and peep -proof display Download PDFInfo
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- CN206163104U CN206163104U CN201621198771.7U CN201621198771U CN206163104U CN 206163104 U CN206163104 U CN 206163104U CN 201621198771 U CN201621198771 U CN 201621198771U CN 206163104 U CN206163104 U CN 206163104U
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Abstract
The utility model discloses a peep -proof display device and peep -proof display. Peep -proof display device includes display screen, light guide plate, first backlight, second backlight, controller and drive circuit, the light side is gone into including the first income light side and the second that lie in two relative sides of light guide plate to the light guide plate, first backlight is relative with first income light side to be set up, and the relative setting of light side is gone into to second backlight and second, the controller is connected with first backlight and is connected with the second backlight, first backlight and the work in turn of second backlight, first backlight of control and the simultaneous working of second backlight under non - peep -proof mode are controlled to the controller under the peep -proof mode, drive circuit is connected with the display screen, and drive circuit adjusts the gamma curve of display screen according to the frequency of operation of first backlight and second backlight under the peep -proof mode to it is inequality in the demonstration luminance that is not equal to correspondence visual angle under 90 the visual angle demonstration luminance NOT AND peep -proof mode down to make the display screen. This peep -proof display device has effectively reduced the cost of manufacture.
Description
Technical field
The application is related to display technology field, more particularly to peep-proof display device and peep-proof display.
Background technology
With the development of Display Technique, the display device such as mobile phone, computer have increasingly be widely applied.Generally, show
Device has larger visual angle, and positioned at the use of different visual angles its information for showing can be known per family.But under some scenes
User wishes that the information shown by display device can not be known by the other users of surrounding, that is, wish that display device has peep-proof work(
Energy.
Existing peep-proof display part is typically employed in increase peep-proof diaphragm outside display screen, filters the light at big visual angle, only
Retain vertically with the light of display screen so that the user of big view position cannot receive the picture shown by display screen, but this
Peep-proof display part is planted due to extra increased peep-proof diaphragm so that the thickness of whole display part increases, while peep-proof diaphragm
Also there is shielding action to the light of vertical angle of view, the display brightness of vertical angle of view is reduced, so as to cause display device power consumption
Increase.
Utility model content
In order to solve the problems, such as that above-mentioned background technology is mentioned, this application provides peep-proof display device and peep-proof display
Part.
On the one hand, this application provides a kind of peep-proof display device, including：Display screen, light guide plate, the first backlight,
Two backlights, controller and drive circuit；The mode of operation of the peep-proof display device includes peep-proof pattern and non-peep-proof mould
Formula；The light guide plate includes the first incident side and the second incident side, and first incident side and second incident side are located at institute
State two relative sides of light guide plate；First backlight is oppositely arranged with first incident side, second backlight
It is oppositely arranged with second incident side；The controller is connected with first backlight, the controller and described second
Backlight connects；The controller controls first backlight under the peep-proof pattern and second backlight replaces work
Make, the controller controls first backlight under the non-peep-proof pattern and second backlight works simultaneously；Institute
State drive circuit to be connected with the display screen, the drive circuit is under the peep-proof pattern according to first backlight and institute
The operating frequency for stating the second backlight adjusts the gamma curve of the display screen, so that the display screen is regarded being not equal to 90 °
Display brightness under angle is differed with the display brightness at corresponding visual angle under the non-peep-proof pattern.
Second aspect, this application provides a kind of peep-proof display, including above-mentioned peep-proof display device.
Peep-proof display device and peep-proof display that the application is provided, by two relative sides in light guide plate the is arranged
One backlight and the second backlight, the first backlight and the second backlight alternating work are controlled under peep-proof pattern using controller
Make, and the Gamma values of display screen under peep-proof pattern are adjusted by drive circuit, the display picture for making non-perpendicular visual angle is lost
Very, peep-proof function is capable of achieving so as to peep-proof diaphragm need not be designed, reduces the thickness and cost of manufacture of peep-proof display device.
Description of the drawings
By reading non-limiting example is described in detail with reference to what the following drawings was made, other features,
Objects and advantages will become more apparent upon：
Fig. 1 is the structural representation of one embodiment of the peep-proof display device according to the embodiment of the present application；
Fig. 2 is the structural representation of one embodiment of the controller according to the embodiment of the present application；
Fig. 3 is the white gamma curve of display screen in peep-proof display device under peep-proof pattern and non-peep-proof pattern
A kind of schematic diagram；
Fig. 4 A and Fig. 4 B are that the emitting brightness of display screen under peep-proof pattern according to the embodiment of the present application is shown with visual angle change
It is intended to；
Fig. 5 A are the red gamma curve of display screen in peep-proof display device under peep-proof pattern and non-peep-proof pattern
A kind of schematic diagram；
Fig. 5 B are the green gamma curve of display screen in peep-proof display device under peep-proof pattern and non-peep-proof pattern
A kind of schematic diagram；
Fig. 5 C are the blue gamma curve of display screen in peep-proof display device under peep-proof pattern and non-peep-proof pattern
A kind of schematic diagram.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining relevant utility model, rather than the restriction to the utility model.Further need exist for explanation
, for the ease of description, illustrate only in accompanying drawing to about the related part of utility model.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Below with reference to the accompanying drawings and in conjunction with the embodiments describing the application in detail.
Fig. 1 is refer to, the structure that it illustrates one embodiment of the peep-proof display device according to the embodiment of the present application is shown
It is intended to.
The mode of operation of the peep-proof display device described in the embodiment of the present application includes peep-proof pattern and non-peep-proof pattern.
Peep-proof display device shown in Fig. 1 100 includes display screen 11, light guide plate 12, the first backlight 131, the second backlight 132, control
Device 14 and drive circuit 15.Wherein, display screen 11 is used to that picture to be shown to be presented, and can be LCDs, including array
Substrate, color membrane substrates and the liquid crystal between array base palte and color membrane substrates.Light guide plate 12 includes the He of the first incident side 121
Second incident side 122, the first incident side 121 and the second incident side 122 are located at two relative sides of light guide plate.
As shown in figure 1, the first backlight 131 is oppositely arranged with the first incident side 121, the second backlight 132 enters with second
Light side 121 is oppositely arranged.In the present embodiment, the light that the light and the second backlight 132 that the first backlight 131 sends sends
By exiting surface (surface relative with the display screen) outgoing of light guide plate 12 after reflection, refraction in light guide plate.
Controller 14 is connected with the first backlight 131 and the second backlight 132, and controller 14 can control the first backlight
131 and second backlight 132 working condition.Controller 14 can respectively to the first backlight 131 and the second backlight 132
Go out drive signal, drive two backlights to be lighted with certain frequency.In the present embodiment, when the first backlight 131 is luminous,
When second backlight 132 does not light, luminosity of the display screen 11 near the side of the first backlight 131 is higher than away from first back of the body
The side of light source 131；When luminous, the second backlight 132 does not light the first backlight 131, display screen 11 is near the second backlight
The luminosity of the side in source 132 is higher than the side away from the second backlight 132.
Drive circuit 15 is connected with display screen 11, and drive circuit 15 is under peep-proof pattern according to the first backlight 131 and
The operating frequency of two backlights 132 adjusts the gamma curve of display screen 11, so that display screen 11 is in the case where 90 ° of visual angle is not equal to
Display brightness differ with the display brightness at corresponding visual angle under non-peep-proof pattern.In other words, drive circuit 15 can control to show
The corresponding Gamma values of each gray scale in picture shown by display screen 11 so that observer it is a certain determination view position when, display screen
Peep-proof pattern and non-peep-proof pattern under in the same display picture observed the display brightness of each pixel differ.
Gamma (gamma) value can be used to indicate that the corresponding pass between display screen output brightness and the data to be displayed of input
System, for example, can be the ratio of output brightness and input brightness data.Gamma curve is that display screen exports brightness with treating for being input into
The corresponding relation curve of the gray scale of display picture.Drive circuit 15 can be according to the gamma curve for determining and from external circuit
The brightness data of the picture to be shown for receiving, draws the brightness of each pixel on display screen after translation operation, and exports correspondence
The drive signal of intensity.
In certain embodiments, controller noted above can include on-off circuit.Fig. 2 is refer to, be it illustrates according to this Shen
Please embodiment controller one embodiment structural representation.As shown in Fig. 2 controller noted above 14 can include switch electricity
Road 21, on-off circuit 21 is connected with the first backlight 231 and the second backlight 232.
First backlight 231 specifically can include at least one first light emitting diode D11, D12 ..., D1m, second the back of the body
Light source 232 specifically can include at least one second light emitting diode D21, D22 ..., D2n, wherein, m, n is positive integer.
On-off circuit 21 includes the first transistor M1, transistor seconds M2, first switch holding wire SW1, second switch letter
Number line SW2 and luminous signal line H1.The grid of the first transistor M1 is electrically connected with first switch holding wire SW1, first crystal
First pole of pipe M1 is connected with luminous signal line H1, second pole of the first transistor M1 and each first light emitting diode D11,
D12 ... the connection of the anode of D1m, each first light emitting diode D11, D12 ... the minus earth GND of D1m.Transistor seconds M2's
Grid is electrically connected with second switch holding wire SW2, and first pole of transistor seconds M2 is connected with luminous signal line H1, the second crystal
Second pole of pipe M2 and each second light emitting diode D21, D22 ..., the anode of D2n be connected, each second light emitting diode D21,
D22 ..., the minus earth GND of D2n.
First switch holding wire SW1 and second switch holding wire SW2 are respectively used to the first transistor M1 and the second crystal
Pipe M2 transmitting switch control signals.Under non-peep-proof pattern, first switch holding wire SW1 and second switch holding wire SW2 is to
One transistor M1 and transistor seconds M2 provides Continuity signal, makes the first transistor M1 and transistor seconds M2 conductings, so as to incite somebody to action
The signal transmission of luminous signal line H1 transmission to each first light emitting diode and the anode of each second light emitting diode, at this moment, can
To provide luminous signal to luminous signal line, the luminous signal voltage is higher than the conducting voltage of each light emitting diode, so that
Each first light emitting diode and each second light emitting diode are simultaneously luminous.
Under non-peep-proof pattern, can be brilliant by first switch holding wire SW1 and second switch holding wire SW2 controls first
Body pipe M1 and transistor seconds M2 timesharing are turned on, so that the first backlight 231 and the time-sharing work of the second backlight 232.
Further, first switch holding wire SW1 and second switch holding wire SW2 can be electrically connected with above-mentioned drive circuit 15
Connect.Under peep-proof pattern, drive circuit 15 can be used for transmitting the first clock signal to first switch holding wire SW1, to second
Switch signal line SW2 transmits the frequency of second clock signal, the first clock signal and second clock signal and is sweeping for display screen
Retouch frequency two times.That is, within the time that display screen shows a frame picture, controller 14 can control the first backlight
Once lighted respectively with the second backlight.In some optional implementations, the first clock signal and second clock are believed
Number can inversion signal each other.
In the present embodiment, drive circuit 15 can be according to the first backlight 131 and the alternation of the second backlight 132
Switching frequency and peep-proof pattern and non-peep-proof pattern are switching the gamma curve of display screen.
Specifically, under peep-proof pattern, controller 14 controls to work in the first backlight 131, the second backlight 132 not
During work, the Gamma values of display screen 11 can be adjusted to the first gamma curve by drive circuit 15, when the control of controller 14 the
When one backlight 131 does not work, the second backlight 132 works, drive circuit 15 can be adjusted to the Gamma values of display screen 11
Second gamma curve.Under non-peep-proof pattern, i.e., the backlight 131 of controller 14 first and the second backlight 132 work simultaneously
When, the Gamma values of display screen 11 are adjusted to the 3rd gamma curve by drive circuit 15.First gamma curve, the 2nd Gamma are bent
Line, the 3rd gamma curve are different, and corresponding to same gray scale to be shown, the output brightness value of the first gamma curve and
The average of the output brightness value of two gamma curves is equal with the output brightness of the 3rd gamma curve.
Further, the Gamma values of above-mentioned display screen can be white gamma curve, i.e. drive circuit 15 by adjusting
The white gamma curve of display screen carrys out adjusting display brightness.
With continued reference to Fig. 3, the display screen in peep-proof display device is it illustrates under peep-proof pattern and non-peep-proof pattern
A kind of schematic diagram of white gamma curve.Wherein abscissa G represents the gray scale to be shown of input, and ordinate I represents that Jing drives
Circuit adjusts the brightness percentage of the backward display screen output of Gamma values.γ1Curve works for the first backlight 131, second back of the body
When light source 132 does not work display screen output brightness percentage with input gray-value variation to be shown curve, i.e., above-mentioned first
Gamma curve；γ2Display screen output brightness percentage when curve does not work for the first backlight 131, the second backlight 132 works
Than the curve of the gray-value variation to be shown with input, i.e., above-mentioned second gamma curve；γ3Curve is the He of the first backlight 131
Display screen exports curve of the brightness percentage with the gray-value variation to be shown of input second backlight 132 works simultaneously when, i.e.,
3rd gamma curve.
As shown in figure 3, for the gray scale of any picture to be shown, the first gamma curve and the second gamma curve not phase
Together.For same gray scale to be shown, corresponding brightness percent value is corresponding with the second gamma curve in the first gamma curve
Brightness percent value average it is equal with corresponding brightness percent value in the 3rd gamma curve.
It should be noted that the 3rd gamma curve shown in Fig. 3 can be display screen being shown according to the Gamma values of acquiescence
Relation curve between the gray scale to be shown being input into when showing and the brightness percentage of output, the first gamma curve and the 2nd Gamma
Curve can be the curve arranged by drive circuit 15.Additionally, Fig. 3 schematically show only the first gamma curve and second
Two kinds of optional modes of gamma curve, the embodiment of the present application is not made to the parameter of the first gamma curve and the second gamma curve
Particular determination.
In the above-described embodiments, light guide plate 12 sends for the first backlight 131 of change and/or the second backlight 132
The transmission direction of light, makes to be transmitted from the light of light guide plate outgoing to display screen direction.Light guide plate generally includes multiple light guiding points,
In the present embodiment, going out in visual angle α when light guiding points can make that display screen works in the first backlight, the second backlight does not work
Brightness with do not work in the first backlight, the second backlight it is unequal in the emitting brightness of visual angle α when working, wherein 0≤α≤
180 ° and α ≠ 90 °.
With further reference to Fig. 4 A and Fig. 4 B, it illustrates display screen under the peep-proof pattern according to the embodiment of the present application goes out light
Brightness with visual angle change schematic diagram, wherein Fig. 4 A show display device 100 shown in Fig. 1 the first backlight work, second
When backlight does not work the emitting brightness of display screen with visual angle change curve, Fig. 4 B show that display device 100 shown in Fig. 1 exists
First backlight does not work, the second backlight work when display screen emitting brightness with visual angle change curve.
As shown in Figure 4 A, when the work of the first backlight, the second backlight do not work, when observer visual angle is less than 80 °,
The emitting brightness percentage I of display screen is higher, and when observer visual angle is when 80 ° are gradually increased to 180 °, display screen goes out light
Degree percentage I is gradually reduced.
As shown in Figure 4 B, do not work in the first backlight, when the second backlight works, when observer visual angle is more than 110 °
When, the emitting brightness percentage I of display screen is higher, and when observer visual angle is when 110 ° gradually decrease to 0 °, display screen goes out light
Brightness percentage I is gradually reduced.
Fig. 4 A and Fig. 4 B schematically illustrate 60 ° and the emitting brightness under 120 ° of visual angles.Under 60 ° and 120 ° of visual angles,
Emitting brightness percentage when first backlight works independently is respectively 0.95 and 0.11, under 60 ° and 120 ° of visual angles, first back of the body
Emitting brightness percentage when light source works independently is respectively 0.11 and 0.95.
Further, above-mentioned light guide plate can make display screen work independently and second backlight in first backlight
The emitting brightness at 90 ° of visual angles is equal when source works independently.As shown in Figure 4 A and 4 B shown in FIG., when the first backlight works independently 90 °
The brightness percentage at visual angle is 0.69, and when the second backlight works independently, the brightness percentage at 90 ° of visual angles is 0.69.
For arbitrary gray scale g to be shown, the corresponding brightness of the first gamma curve is I1, the second gamma curve is corresponding bright
Spend for I2；When at visual angle, α watches the image of display screen, it is assumed that its corresponding brightness percentage when the first backlight works independently
For p, when the second backlight works independently, its corresponding brightness percentage is q, then shown using the peep-proof of the embodiment of the present application
Device, in the actual displayed brightness I of corresponding each pixel of peep-proof pattern downwards angle of visibility ααCan be calculated using equation below (1)：
Iα=(I1×p+I2×q)/2 (1)
Actual displayed brightness IαCorresponding gray value in the 3rd gamma curve is the reality of gray scale g to be shown and shows
Show gray scale.
The peep-proof principle that Fig. 3, Fig. 4 A and Fig. 4 B illustrate above-mentioned display device is combined further below.
Under 90 ° of visual angles of peep-proof pattern, if the work of the first backlight, the second backlight do not work, for ash to be shown
Degree 23, emitting brightness of the display screen under the effect of the first gamma curve is 0.193, in this operating mode emitting brightness percentage
Than for 0.69；If the first backlight does not work, the work of the second backlight, for gray scale to be shown 23, make in the second gamma curve
It is 0.02952 with the emitting brightness of lower display screen, in this operating mode emitting brightness percentage is 0.69；Then display screen is whole
Body emitting brightness percentage I90Equivalent to the superposition of both mode of operations：I90=(0.193 × 0.69)+(0.02952 ×
0.69)/2=0.0768, in figure 3 emitting brightness percentage be about 20 for 0.0768 corresponding abscissa value, that is, show screen display
The actual grey for showing is 20.
Under 60 ° of visual angles of peep-proof pattern, if the work of the first backlight, the second backlight do not work, for ash to be shown
Degree 23, emitting brightness of the display screen under the effect of the first gamma curve is 0.193, in this operating mode emitting brightness percentage
Than for 0.95；If the first backlight does not work, the work of the second backlight, for gray scale to be shown 23, make in the second gamma curve
It is 0.02952 with the emitting brightness of lower display screen, in this operating mode emitting brightness percentage is 0.11；Then display screen is whole
Body emitting brightness percentage I60Equivalent to the superposition of both mode of operations：I60=(0.193 × 0.95)+(0.02952 ×
0.11)/2=0.1866, in figure 3 emitting brightness percentage be about 29 for 0.1866 corresponding abscissa value, that is, show screen display
The actual grey for showing is 29.
Under 120 ° of visual angles of peep-proof pattern, if the work of the first backlight, the second backlight do not work, for ash to be shown
Degree 23, emitting brightness of the display screen under the effect of the first gamma curve is 0.193, in this operating mode emitting brightness percentage
Than for 0.11；If the first backlight does not work, the work of the second backlight, for gray scale to be shown 23, make in the second gamma curve
It is 0.02952 with the emitting brightness of lower display screen, in this operating mode emitting brightness percentage is 0.95；Then display screen is whole
Body emitting brightness percentage I60Equivalent to the superposition of both mode of operations：I120=(0.193 × 0.11)+(0.02952 ×
0.95)/2=0.0493, in figure 3 emitting brightness percentage be about 16 for 0.0493 corresponding abscissa value, that is, show screen display
The actual grey for showing is 16.
Above as can be seen that under peep-proof pattern, for the reality that display screen under 23,90 ° of visual angles of gray scale to be shown shows
Border gray scale is that the actual grey that display screen shows under 20,60 ° of visual angles and 120 ° of visual angles is respectively 29 and 16.Visual display is being regarded
Angle is not much larger than in the distortion that visual angle is 90 ° for 90 ° of distortion.In the embodiment of the present application, light guide plate makes display screen in first back of the body
Light source work independently 90 ° of visual angles when working independently with the second backlight emitting brightness it is equal and independent in the first backlight
The emitting brightness at other visual angles is unequal when work and the second backlight work independently, if light guide plate makes the independent work of the first backlight
The emitting brightness percentage at 90 ° of visual angles is 1.00 when making to be worked independently with the second backlight, then the display screen under peep-proof pattern
Overall emitting brightness percentage I '90=(0.193 × 1.00)+(0.02952 × 1.00)/2=0.1113, goes out in figure 3 light
Brightness percentage is that 0.1113 corresponding abscissa value is about actual grey that 23, i.e. display screen shown at 90 ° of visual angles and waits to show
Show that gray scale is consistent.
In some embodiments of the present application, drive circuit can be respectively provided with red component, green in picture to be shown
The gamma curve of component and blue component, and respectively according to the gamma curve of red component, the gamma curve of green component with
And blue component gamma curve determine output the brightness percentage of red component, the brightness percentage of green component and
The brightness percentage of blue component.
Specifically, Fig. 5 A, Fig. 5 B and Fig. 5 C are refer to, the display screen in peep-proof display device is which respectively show anti-
A kind of signal of red gamma curve, green gamma curve and the blue gamma curve peeped under pattern and non-peep-proof pattern
Figure.
When the work of the first backlight, the second backlight do not work, drive circuit sets the red gamma curve of display screen
It is set to the first red gamma curve (γ shown in Fig. 5 A11Curve), the green gamma curve of display screen is set into first green
Gamma curve (γ shown in Fig. 5 B21Curve), the blue gamma curve of display screen is arranged at into the first blue gamma curve (figure
γ shown in 5C31Curve)；Do not work in the first backlight, when the second backlight works, drive circuit is by the redness of display screen
Gamma curve is set to the second red gamma curve (γ shown in Fig. 5 A12Curve), the green gamma curve of display screen is arranged
For the second green gamma curve (γ shown in Fig. 5 B22Curve), the blue gamma curve of display screen is arranged at into second blue
Gamma curve (γ shown in Fig. 5 C32Curve)；When the first backlight and the second backlight work simultaneously, drive circuit will show
The red gamma curve of screen is set to the 3rd red gamma curve (γ shown in Fig. 5 A13Curve), by the green Gamma of display screen
Curve is set to the 3rd green gamma curve (γ shown in Fig. 5 B23Curve), the blue gamma curve of display screen is arranged at into
Three blue gamma curve (γ shown in Fig. 5 C33Curve).
First red gamma curve, the second red gamma curve, the 3rd red gamma curve are different, and first is green
Color gamma curve, the second green gamma curve, the 3rd green gamma curve are different, the first blue gamma curve, the
Two blue gamma curves, the 3rd blue gamma curve are different.
Alternatively, as shown in Fig. 5 A, Fig. 5 B and Fig. 5 C, drive circuit can arrange first red gamma curve (Fig. 5 A institutes
Show γ11Curve), the first green gamma curve (γ shown in Fig. 5 B21Curve), the first blue gamma curve (γ shown in Fig. 5 C31
Curve) it is different；Second red gamma curve (γ shown in Fig. 5 A is set12Curve), second green gamma curve (Fig. 5 B institutes
Show γ22Curve), the second blue gamma curve (γ shown in Fig. 5 C33Curve) it is different.
Corresponding to the gray scale of same red component to be shown, the output brightness value and second of the first red gamma curve
The average of the output brightness value of Gamma red curves is equal with the output brightness value of the 3rd red gamma curve, such as Fig. 5 A
In, corresponding to the gray scale 23, γ of same red component to be shown11The corresponding output brightness percentage of curve is 0.193, γ12
The corresponding output brightness percentage of curve is 0.02952, γ13The corresponding output brightness percentage of curve is 0.1113 ≈ (0.193
+0.02952)/2。
Corresponding to the gray scale of the green component of same picture to be shown, the output brightness value of the first green gamma curve and
The average of the output brightness value of the 2nd Gamma green curves is equal with the output brightness value of the 3rd green gamma curve, for example, scheme
In 5B, corresponding to the gray scale 36, γ of same green component to be shown21The corresponding output brightness percentage of curve is 0.1084,
γ22The corresponding output brightness percentage of curve is 0.4826, γ23The corresponding output brightness percentage of curve is 0.2955=
(0.1084+0.4826)/2。
Corresponding to the gray scale of the blue component of same picture to be shown, the output brightness value of the first blue gamma curve and
The average of the output brightness value of the 2nd Gamma blue curves is equal with the 3rd blue gamma curve output brightness value, such as Fig. 5 C
In, corresponding to the gray scale 33, γ of same blue component to be shown31The corresponding output brightness percentage of curve is 0.186, γ32
The corresponding output brightness percentage of curve is 0.3013, γ33The corresponding output brightness percentage of curve is 0.2437 ≈ (0.186+
0.3013)/2。
If the gray scale of the red component, green component and blue component of a certain pixel intensity of picture to be shown is respectively
23rd, 36,33, export bright in the state of the first backlight works independently and worked independently with the second backlight with reference to Fig. 4 A and Fig. 4 B
Degree percentage and the relation curve at visual angle, can calculate actual displayed brightness.
For example, for 60 ° of visual angles, with reference to Fig. 4 A, the first backlight works independently the brightness percentage exported under state
Than for 0.95, the second backlight brightness percentage exported under state that works independently is 0.11.
The actual displayed brightness I of red componentR60=(0.95 × 0.193+0.11 × 0.2952)=0.1866, corresponding diagram
γ in 5A13It is 29 that curve can draw brightness for 0.1866 corresponding actual grey, then the actual displayed gray scale of red component is
29。
The actual displayed brightness I of green componentG60=(0.95 × 0.1084+0.11 × 0.4826)=0.1561, corresponding diagram
γ in 5B23It is 27 that curve can draw brightness for 0.1561 corresponding actual grey, then the actual displayed gray scale of green component is
27。
The actual displayed brightness I of blue componentB60=(0.95 × 0.186+0.11 × 0.3013)=0.2098, corresponding diagram
γ in 5C33It is 31 that curve can draw brightness for 0.1866 corresponding actual grey, then the actual displayed gray scale of red component is
31。
It can be seen that for pixel intensity (26,36,33), its actual display brightness for (29,27,31), then the reality of the pixel
Display brightness there occurs deviation at 60 ° of visual angles, i.e., cannot see normal picture to be shown at 60 ° of visual angles.
For 120 ° of visual angles, with reference to Fig. 4 A, the first backlight brightness percentage exported under state that works independently is 0.11,
The second backlight brightness percentage exported under state that works independently is 0.95.
The actual displayed brightness I of red componentR60=(0.11 × 0.193+0.95 × 0.2952)=0.0493, corresponding diagram
γ in 5A13It is 29 that curve can draw brightness for 0.0493 corresponding actual grey, then the actual displayed gray scale of red component is
16。
The actual displayed brightness I of green componentG60=(0.11 × 0.1084+0.95 × 0.4826)=0.4704, corresponding diagram
γ in 5B23It is 45 that curve can draw brightness for 0.4704 corresponding actual grey, then the actual displayed gray scale of green component is
45。
The actual displayed brightness I of blue componentB60=(0.11 × 0.186+0.95 × 0.3013)=0.3067, corresponding diagram
γ in 5C33It is 37 that curve can draw brightness for 0.1866 corresponding actual grey, then the actual displayed gray scale of red component is
37。
It can be seen that for pixel intensity (26,36,33), its actual display brightness for (16,45,37), then the reality of the pixel
Display brightness there occurs deviation at 120 ° of visual angles, i.e., cannot also see normal picture to be shown at 120 ° of visual angles.
In the same manner, under other non-90 degree visual angles, due to the gamma curve of red component under peep-proof pattern, green component
The gamma curve of gamma curve and blue component is different, in actual displayed brightness in each color component and gray scale to be shown
The ratio of each color component is unequal, after above-mentioned drive circuit computing, each pixel in the picture shown by display screen
Color can change, and cause whole display picture distortion, then cannot normally watch display picture under non-90 degree visual angle, and
Under 90 ° of visual angles, each color component is equal with the ratio of each color component in gray scale to be shown in actual displayed brightness, display picture
In the color of each pixel will not change, whole display picture will not occur distortion, it is achieved thereby that peep-proof function.
The peep-proof display device that the above embodiments of the present application are provided, on the premise of peep-proof film is not increased, by controller
Two backlight alternations under peep-proof pattern of control, and using the emitting brightness percentage of drive circuit control display screen,
So that the color of each pixel occurs deviation in the display picture at non-90 degree visual angle, and then distortion is made, so as to realize preventing
Peep, reduce the thickness and cost of manufacture of peep-proof display device.Simultaneously as there is no peep-proof diaphragm shielding light, be conducive to
Reduce the power consumption of display device under peep-proof pattern.
In certain embodiments, the display screen in above-mentioned peep-proof display device include a plurality of data lines and with many datas
The pel array of line connection.Drive circuit is electrically connected with a plurality of data lines, and drive circuit determines according to the gamma curve after regulation
Data-signal, and by data signal transmission to a plurality of data lines.So, drive circuit is pressed in the picture data to be shown to receiving
After being changed according to the gamma curve after regulation, the corresponding actual displayed brightness of each pixel on display screen is determined, and according to
Actual displayed brightness determines to be transmitted to the data signal strength of the pixel, and then drives whole display screen according to actual displayed brightness
Shown, so that observer has difference in the display picture that different visual angles are observed, and then realized display device
Peep-proof.
The embodiment of the present application additionally provides a kind of peep-proof display, including above-mentioned peep-proof display device.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.People in the art
Member should be appreciated that utility model scope involved in the application, however it is not limited to the particular combination of above-mentioned technical characteristic
Technical scheme, while also should cover in the case where conceiving without departing from the utility model, by above-mentioned technical characteristic or its equivalent
Other technical schemes that feature is combined and is formed.Such as features described above has with (but not limited to) disclosed herein
The technical scheme that the technical characteristic for having similar functions is replaced mutually and formed.
Claims (11)
1. a kind of peep-proof display device, it is characterised in that include：Display screen, light guide plate, the first backlight, the second backlight, control
Device processed and drive circuit；
The mode of operation of the peep-proof display device includes peep-proof pattern and non-peep-proof pattern；
The light guide plate includes the first incident side and the second incident side, and first incident side and second incident side are located at institute
State two relative sides of light guide plate；
First backlight is oppositely arranged with first incident side, and second backlight is relative with second incident side
Arrange；
The controller is connected with first backlight, and the controller is connected with second backlight；
The controller controls first backlight and the second backlight alternation under the peep-proof pattern, described
Controller controls first backlight under the non-peep-proof pattern and second backlight works simultaneously；
The drive circuit is connected with the display screen, and the drive circuit is under the peep-proof pattern according to first backlight
The operating frequency of source and second backlight adjusts the gamma curve of the display screen, so that the display screen is being not equal to
Display brightness under 90 ° of visual angle is differed with the display brightness at corresponding visual angle under the non-peep-proof pattern.
2. peep-proof display device according to claim 1, it is characterised in that first backlight includes at least one the
One light emitting diode, second backlight includes at least one second light emitting diodes；
The controller includes on-off circuit, and the on-off circuit includes the first transistor, transistor seconds, first switch signal
Line, second switch holding wire and luminous signal line；
The grid of the first transistor is electrically connected with the first switch holding wire, the first pole of the first transistor and institute
The connection of luminous signal line is stated, the second pole of the first transistor is connected with the anode of each first light emitting diode, each institute
State the minus earth of the first light emitting diode；
The grid of the transistor seconds is electrically connected with the second switch holding wire, the first pole of the transistor seconds and institute
The connection of luminous signal line is stated, the second pole of the transistor seconds is connected with the anode of each second light emitting diode,
The minus earth of each second light emitting diode.
3. peep-proof display device according to claim 2, it is characterised in that the first switch holding wire and described second
Switch signal line is electrically connected with the drive circuit.
4. peep-proof display device according to claim 3, it is characterised in that under peep-proof pattern, the drive circuit is used
In the first clock signal is transmitted to the first switch holding wire, to the second switch holding wire second clock signal is transmitted；
The frequency of first clock signal and the second clock signal is two times of the scan frequency of the display screen.
5. peep-proof display device according to claim 1, it is characterised in that the drive circuit is in first backlight
The gamma curve of the display screen is set to the first gamma curve by work, second backlight when not working, described
It is bent that first backlight does not work, the gamma curve of the display screen is set to the 2nd Gamma by second backlight when working
Line, the is set to when first backlight and second backlight work simultaneously by the gamma curve of the display screen
Three gamma curves；
Wherein, the first gamma curve, the second gamma curve, the 3rd gamma curve are different, and corresponding to same to be shown
The average of gray scale, the output brightness value of the first gamma curve and the output brightness value of the second gamma curve is bent with the 3rd Gamma
The output brightness of line is equal.
6. peep-proof display device according to claim 1, it is characterised in that the light guide plate includes multiple light guiding points, and
The light guiding points are used to making when the display screen works in first backlight, second backlight does not work in visual angle α
Emitting brightness with do not work in first backlight, second backlight works when the visual angle α emitting brightness
It is unequal, wherein 0≤α≤180 ° and α ≠ 90 °.
7. peep-proof display device according to claim 6, it is characterised in that the light guide plate makes the display screen described
First backlight work independently 90 ° of visual angles when working independently with second backlight emitting brightness it is equal.
8. peep-proof display device according to claim 1, it is characterised in that first backlight work, described the
When two backlights do not work, it is bent that the red gamma curve of the display screen is set to the first redness Gamma by the drive circuit
Line, is set to the first green gamma curve, by the blue Gamma of the display screen by the green gamma curve of the display screen
Curve is arranged at the first blue gamma curve；
Do not work in first backlight, when second backlight works, the drive circuit is red by the display screen
Color gamma curve is set to the second red gamma curve, the green gamma curve of the display screen is set into second green
Gamma curve, by the blue gamma curve of the display screen the second blue gamma curve is arranged at；
When first backlight and second backlight work simultaneously, the drive circuit is by the redness of the display screen
Gamma curve is set to the 3rd red gamma curve, the green gamma curve of the display screen is set into the 3rd green
Gamma curve, by the blue gamma curve of the display screen the 3rd blue gamma curve is arranged at；
Wherein, the first red gamma curve, the second red gamma curve, the 3rd red gamma curve are different, and first is green
Color gamma curve, the second green gamma curve, the 3rd green gamma curve are different, the first blue gamma curve, the
Two blue gamma curves, the 3rd blue gamma curve are different；And
Corresponding to the gray scale of same red component to be shown, the output brightness value and the 2nd Gamma of the first red gamma curve
The average of the output brightness value of red curve is equal with the output brightness value of the 3rd red gamma curve；
Corresponding to the gray scale of the green component of same picture to be shown, the output brightness value and second of the first green gamma curve
The average of the output brightness value of Gamma green curves is equal with the output brightness value of the 3rd green gamma curve；
Corresponding to the gray scale of the blue component of same picture to be shown, the output brightness value and second of the first blue gamma curve
The average of the output brightness value of Gamma blue curves is equal with the 3rd blue gamma curve output brightness value.
9. peep-proof display device according to claim 8, it is characterised in that it is described first red that the drive circuit is arranged
Color gamma curve, the described first green gamma curve, the described first blue gamma curve are different；
It is the described second red gamma curve that the drive circuit is arranged, the described second green gamma curve, described second blue
Color gamma curve is different.
10. peep-proof display device according to claim 1, it is characterised in that the display screen include a plurality of data lines with
And the pel array being connected with a plurality of data lines；
The drive circuit is electrically connected with a plurality of data lines, and the drive circuit determines according to the gamma curve after regulation
Data-signal, and by the data signal transmission to a plurality of data lines.
11. a kind of peep-proof displays, it is characterised in that include the peep-proof display device as described in any one of claim 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621198771.7U CN206163104U (en) | 2016-11-07 | 2016-11-07 | Peep -proof display device and peep -proof display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621198771.7U CN206163104U (en) | 2016-11-07 | 2016-11-07 | Peep -proof display device and peep -proof display |
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| CN206163104U true CN206163104U (en) | 2017-05-10 |
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| CN201621198771.7U Active CN206163104U (en) | 2016-11-07 | 2016-11-07 | Peep -proof display device and peep -proof display |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108646493A (en) * | 2018-07-03 | 2018-10-12 | 京东方科技集团股份有限公司 | A kind of display device |
| US10712488B2 (en) | 2017-06-30 | 2020-07-14 | Sioptica Gmbh | Screen for a free and a restricted viewing mode |
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| CN116206558A (en) * | 2023-05-06 | 2023-06-02 | 惠科股份有限公司 | Display panel control method and display device |
| USRE49613E1 (en) | 2015-11-27 | 2023-08-15 | Sioptica Gmbh | Screen for a free and restricted operating mode |
| CN116682379A (en) * | 2023-06-20 | 2023-09-01 | 惠科股份有限公司 | Display panel, display driving method and display device |
| CN116887640A (en) * | 2023-06-30 | 2023-10-13 | 惠科股份有限公司 | Display panel and display device |
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2016
- 2016-11-07 CN CN201621198771.7U patent/CN206163104U/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE49613E1 (en) | 2015-11-27 | 2023-08-15 | Sioptica Gmbh | Screen for a free and restricted operating mode |
| US10712488B2 (en) | 2017-06-30 | 2020-07-14 | Sioptica Gmbh | Screen for a free and a restricted viewing mode |
| US10768355B2 (en) | 2017-08-14 | 2020-09-08 | Sioptica Gmbh | Screen for a free and a restricted viewing mode and application thereof |
| CN108646493A (en) * | 2018-07-03 | 2018-10-12 | 京东方科技集团股份有限公司 | A kind of display device |
| CN108646493B (en) * | 2018-07-03 | 2021-01-22 | 京东方科技集团股份有限公司 | Display device |
| CN116206558A (en) * | 2023-05-06 | 2023-06-02 | 惠科股份有限公司 | Display panel control method and display device |
| CN116206558B (en) * | 2023-05-06 | 2023-08-04 | 惠科股份有限公司 | Display panel control method and display device |
| CN116682379A (en) * | 2023-06-20 | 2023-09-01 | 惠科股份有限公司 | Display panel, display driving method and display device |
| CN116682379B (en) * | 2023-06-20 | 2024-04-12 | 惠科股份有限公司 | Display panel, display driving method and display device |
| CN116887640A (en) * | 2023-06-30 | 2023-10-13 | 惠科股份有限公司 | Display panel and display device |
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