Planar LC640.480.21-065 User Manual

LC640.480.21-065

HIGH PERFORMANCE 6.5" COLOR TFT AMLCD

Operations Manual

The Definition of Quality

®

Copyright © 2000 by Planar Systems, Inc.

Planar and The Definition of Quality are registered trademarks.
ColorBrite is a trademark of Planar Systems, Inc.

This document is subject to change without notice. Planar provides this information as reference only and does not imply any
recommendation or endorsement of other vendor’s products.

Revision Control

Date Description

September 2000 Document number OM610-00

Contents

LC640.480.21-065 Display ............................................................................................................. 1

Features and Benefits................................................................................................................... 1

Installation and Handling................................................................................................................. 2

Mounting the Display .................................................................................................................. 2

Mounting Display Face Down.................................................................................................2

Mounting Display Face Up ..................................................................................................... 2

Thermal Control...................................................................................................................... 2

Isolation and Air Gap..............................................................................................................2

Ambient Light Sensor Clearance.............................................................................................3

Cable Length................................................................................................................................3

Cleaning....................................................................................................................................... 3

Avoiding Image Retention........................................................................................................... 3

Specifications .................................................................................................................................. 4

Environmental Characteristics..................................................................................................... 4

Safety and EMI Certifications................................................................................................. 4

Reliability and Backlight Life.................................................................................................. 4

Mechanical Characteristics..........................................................................................................5

Optical Characteristics................................................................................................................. 6

Viewing Angles........................................................................................................................ 7

Response Times ....................................................................................................................... 7

Interfacing and Operation................................................................................................................ 8

Control Basics.............................................................................................................................. 8

Power Requirements................................................................................................................8

Power Sequencing (LCD)........................................................................................................ 9

Video Signals...............................................................................................................................9

Video Signal Characteristics................................................................................................... 9

Signal Timing......................................................................................................................... 10

Video Characteristics................................................................................................................. 14

Pixel Position......................................................................................................................... 15

Warmup Characteristic ......................................................................................................... 16

Connectors................................................................................................................................. 17

Video Input and Backlight Control Connector (J1).............................................................. 17

Backlight Inverter and Heater Connector (J2) ..................................................................... 19

Ambient Light Sensor (Tethered Option) (J3)....................................................................... 19

Luminance Features....................................................................................................................... 20

Backlight Dimming.................................................................................................................... 20

Manual Dimming...................................................................................................................20

Automatic Dimming (Ambient Light Sensor) ........................................................................ 22

Automatic Dimming (Manual Offset)....................................................................................23

Controlled Luminance Mode................................................................................................. 23

Backlight Enable........................................................................................................................ 24

LC640.480.21-065 Operations Manual (OM610-00) i

Temperature Considerations...................................................................................................... 24

Luminance Variation Due to Ambient Temperature ............................................................. 24

Temperature Sensors............................................................................................................. 25

Heater Operation and Over Heat Status Lines ..................................................................... 25

Backlight Heater................................................................................................................ .... 25

Cell Heater ............................................................................................................................ 28

High Temperature Control.................................................................................................... 30

Defects........................................................................................................................................... 31

Emissive Defects ....................................................................................................................... 31

Cosmetic Defects....................................................................................................................... 32

Display Dimensions....................................................................................................................... 33

Figures

Figure 1. Viewing Angles............................................................................................................ 7

Figure 2. Response Times............................................................................................................ 7

Figure 3. Power Sequencing........................................................................................................ 9

Figure 4. Timing Diagram. ........................................................................................................ 11

Figure 5. Timing Diagram. ........................................................................................................ 12

Figure 6. Timing Diagram. ........................................................................................................ 13

Figure 7. Pixel Position of Input Data. ...................................................................................... 15

Figure 8. Warmup Curve. .......................................................................................................... 16

Figure 9. Connector Locations. ................................................................................................. 17

Figure 10. Dimming Voltage Input on J1 (DIM)....................................................................... 20

Figure 11. Luminance vs. Dimming Voltage: Manual Dimming.............................................. 21

Figure 12. Luminance Levels: Automatic Dimming (Ambient Light Sensor).......................... 22

Figure 13. Luminance Levels: Automatic Dimming (Manual Offset). ..................................... 23

Figure 14. Backlight Power Consumption.................................................................................24

Figure 15. Sensor Temperature vs. Lamp Heater (Inverter Startup Time Delay) ..................... 26

Figure 16. Sensor T emperature vs. Lamp Heater Duty Cycle................................................... 27

Figure 17. Display Warmup Performance................................................................................. 27

Figure 18. Cell Heater Response Time Performance. ............................................................... 28

Figure 19. Cell Heater Maximum Power Time. ........................................................................ 29

Figure 20. Cell Heater Duty Cycle. ........................................................................................... 29

Figure 21. Temperature Control: Maximum Pulse Width Modulation Duty Cycle.................. 30

Figure 22. Diameter Calculation................................................................................................ 32

Figure 23. Display Dimensions. ................................................................................................ 33

LC640.480.21-065 Operations Manual (OM610-00)ii

LC640.480.21-065 Display

The LC640.480.21-065 is a 6.5-inch diagonal VGA active matrix liquid crystal display
(AMLCD) designed to meet the demanding SAE specifications for the transportation
industry. This display is ideal for a variety of industrial applications, such as point-of­sale and outdoor kiosks. With a typical brightness of 1000 nits, this sunlight-readable
display offers high contrast in bright environments along with a wide dimming range for
nighttime operation. With its modular design, this display is perfect for mobile
computing and rugged applications where a high-performance embedded display is
required.

AMLCD Panel: The panel is a color active matrix LCD module incorporating
amorphous silicon TFT (thin film transistor) technology with wide viewing angle
characteristics. The video interface is digital, 6-bits per color, which allows up to
262,144 different colors.

Backlight Module: The backlight assembly contains six high-efficiency cold cathode
fluorescent lamps (CCFL), temperature sensors, and lamp heaters. All the components
are mounted to a single circuit board. The CCFLs are heated at low temperatures to
increase their luminance and extend their life. Located in front of the backlight module
are several diffusing and brightness-enhancement films.

Inverter Module: This assembly contains the backlight inverter electronics,
microprocessor, heater control circuitry, and input/output connectors. All the
components are mounted to a single circuit board. The microprocessor controls the
inverter, heater, and dimming functions. The dimming functions include manual analog
and automatic control based upon ambient light.

Ambient Light Sensor: The ambient light sensor can remain attached to the display or
mounted remotely using a cable.

Video Interface: Standard VGA TFT interface is digital 6-bit RGB.

Features and Benefits

♦ 1000 cd/m2typical luminance for sunlight-readability
♦ 3:1 contrast @ 100K Lux ambient for outdoor daylight use
♦ Wide +35/-45° vertical / ±50° horizontal viewing angle
♦ 300:1 digital dimming for efficient control over a wide range of ambient light
♦ 18-bit ( 6 bits per color) video interface for wide color range (262,144 colors)
♦ 30,000 hours MTBF for long service-free operating life
♦ Durable and lightweight for rugged conditions
♦ Convection cooling for operation without cooling fans
♦ Modular design for easy field replacement of backlight and inverter
♦ Automatic thermal management at low and high temperature extremes

LC640.480.21-065 Operations Manual (OM610-00) 1

Installation and Handling

Do not drop, bend, or flex the display. Do not allow objects to strike the surface of the
display.

Mounting the Display

To maximize shock and vibration performance, the display must be properly mounted
using all four mounting hole locations. There are two recommended mounting
configurations. Appropriate changes to these mounting configurations may be needed to
meet specific requirements or applications. Table 1 below lists the recommended
mounting hardware.

Table 1. Mounting Hardware.

Screw
Washer
Tightening torque

M2.5 SS phillips-head or #4 SS phillips-head
Lockwasher, split type
4oz-in \ 2.8x105dyne – cm

Mounting Display Face Down

Standoff spacers or bosses with a minimum height of 3.0 mm must be used at all four
mounting locations to prevent binding and deflection of the display.

Mounting Display Face Up

Standoff spacers or bosses with a minimum height of 33.0 mm must be used at all four
mounting locations to prevent binding and deflection of the display.

Thermal Control

Several thermal sensors located on the backlight module allow the display to operate
safely at temperature extremes. At low ambient temperatures, heaters on the backlight
module warm t he lamps to a safe temperature before energizing the lamps. This cold­start routine extends the life of the lamps and increases the luminance at low
temperatures. During the warm up period, pin 39 on the input connector is set low.

At high ambient temperatures, the luminance will gradually be reduced to maintain
acceptable temperatures on the inverter module. If the temperatures remain above the
acceptable level after the luminance has been totally reduced, then the inverter will shut
down. During the luminance reduction period, pin 40 on the input connector (J1) is set to
low.

Isolation and Air Gap

The display generates high voltage AC to drive the CCFL tubes. High voltage is present
at numerous points on the backlight and inverter module that forms the rear surface of
the display, so your application should not place metal too near the module. In the
interests of both high voltage isolation and airflow for cooling, it is recommended that an
air gap of .197" (5 mm) or greater be maintained behind the display.

LC640.480.21-065 Operations Manual (OM610-00)2

Ambient Light Sensor Clearance

Two backlight dimming modes utilize automatic brightness control. If the display is to be
operated in either of these modes, the ambient light sensor located on the front bezel
must be unobstructed. If the sensor is placed behind the same protective window as the
display active (viewing) area, the sensor operation may be affected due to light scattering
and reflections from display-generated light coupling to the sensor via the window.

Cable Length

Due to the high frequencies present on the video interface, unterminated video cable
lengths of more than 12 inches (300 mm) are discouraged.

Cleaning

Care should be taken to minimize scratching. Clean the display front with a dry, soft
cloth such as a professional photographic lens cleaner. Disposable cleaning cloths are
recommended to minimize the risk of inadvertently scratching the display with particles
embedded in a re-used cloth. Particular care should be taken when cleaning displays with
polarizers or anti-glare and anti-reflective films. These films may delaminate if exposed
to certain chemicals.

Avoiding Image Retention

Image retention may occur when a fixed pattern is displayed for a long time. Use a
screen saver or image inversion to avoid image retention on the display.

LC640.480.21-065 Operations Manual (OM610-00) 3

Specifications

Performance characteristics are guaranteed with the display at room temperature (25 °C)
and with the operating voltage within specifications, unless otherwise specified. Optical
performance is referenced to screen center at normal i ncidence with a full white screen
display and the backlight at maximum luminance, 60Hz LCD frame rate, unless
otherwise specified.

Environmental Characteristics

Table 2. Environmental Characteristics.

Temperature

Operating
Operating survival
Storage

Humidity

Operating
Non-operating

Altitude

Operating
Non-operating

Vibration (random)

Operating/Non-operating 0.02 g2/Hz, 5-500 Hz, 30 min. ea. axis, per IEC 68-2-34

Shock

Operating/Non-operating 100 g, 6 ms, half sine wave, 3 shocks per surface, per IEC 68-2-27

-20 to +71 °C (-40 to +71°C with cell heater/version -01)

-40to+85°C,2hrs.maximum

-45to+90°C,24hrs.maximum

93% RH @ 40 °C, non-condensing, 10 days per IEC 68-2-3
0 to 95% RH @ 25-55 ºC, 6 days per IEC 68-2-30

0 to 10k ft. per IEC 68-2-13
0 to 40k ft. per IEC 68-2-13

Specific profiles for each axis, SAE J1455, section 4.9

Safety and EMI Certifications

The display will not inhibit the end product from compliance with UL1950, CSA22.2,
and IEC950. When housed in a suitable enclosure, the display will not inhibit the end
product from complying with FCC Part 15, Subpart J Class B, EN55022 Class B, or
SAE-J-1113.

Reliability and Backlight Life

The demonstrated system MTBF is to be greater than 30,000 hours with a 90%
confidence level at 25 °C. Refer to Table 3 for backlight life.

Table 3. Backlight Life.

Usage Backlight life (typical to 50% of initial luminance)

Continuous at full luminance 20K hours
Continuous at half luminance 60K hours
Typical use using CBM* 50K hours @ 700 cd/m
* Controlled luminance mode

2

LC640.480.21-065 Operations Manual (OM610-00)4

Mechanical Characteristics

Refer to mechanical outline drawing in Figure 23 on page 33. All size measurements
shown in Table 3 are in millimeters (inches).

Table 4. Mechanical Characteristics.

Display External Dimensions

width
height
depth

Weight (normal)

Display Active Area

width
height
diagonal

Pixel Pitch

width
height

178.8 (7.04 ) nominal

126.8 (4.99) nominal

38.3 (1.51) nominal

470 g (1.05 lbs.)

132.48 (5.22) nominal

99.36 (3.91) nominal

165.10 (6.5)

.207 (0.008) nominal
.207 (0.008) nominal

LC640.480.21-065 Operations Manual (OM610-00) 5

Optical Characteristics

Table 5. Optical Characteristics.

Luminance (at screen center)

Standard (typical)

1

Controlled (typical)

Contrast Ratio

Dark room ambient
500 Lux ambient
5K Lux ambient
20K Lux ambient

Color Coordinates

2

3cd/m
3cd/m

minimum, 1000 cd/m2maximum (initial)

2

minimum, 700 cd/m2maximum

150: 1 typical, 80:1 minimum
92:1 typical
12:1 typical
4:1 typical

White field x = .362 typical; y = .370 typical

Luminance Non-uniformity

25% maximum With a white screen, max difference between any 2 of 5

points is defined as follows:
Lnu (%) = (1- (Lmin/Lmax)) x 100%

Luminance Control (typical))

Dimming range 50:1 initial, 300:1 stabilized (Lmax after > 15 minutes

at max. lum., then Lmin at min. lum; dimming range =
Lmax/Lmin)

Ambient Light Sensor

Response
Field of view
Dynamic range

Viewing Angles

Horizontal
Vertical

Visible light filtered ~420 to 675nm @ 50% pts.
±50 degrees typical to half sensitivity
0 to 3000 Lux typ.; assumes 18% scene reflectance

±50 degrees typ., White/black CR ≥ 10
+35/-45 degrees typ., White/black CR ≥ 10

(See Figure 1)

1

The contrast brightness mode regulates backlight luminance via feedback over the life
of the lamps. The lamp and luminance life will vary depending on the chosen controlled
luminance level. For more information, see “Backlight Dimming” on page 20.

LC640.480.21-065 Operations Manual (OM610-00)6

Viewing Angles

-

-

+

+

w

Figure 1. Viewing Angles.

Normal Line

θ

H

θ

V

θ

V

θ

H

where:

θ

+Horizontal angle (+50)

+H

θ

-Horizontal angle (-50)

-H

+Vertical angle (+35)

θ

+V

θ

-Vertical angle (-45)

-V

and R/L and U/D = default

6o’clockdirection

Response Times

As shown in Figure 2, the rise response time (from white to black) is 40 ms typical and
the fall response time (from black to white) is 50 ms typical.

Figure 2. Response Times.

Photo-

detector

output

(Relative Value)

100%

90%

10%

0%

blackwhite

hite

τr = Rise (wht to blk): 40 ms typ
τf=Fall(blktowht): 50mstyp

τr

f

τ

time

LC640.480.21-065 Operations Manual (OM610-00) 7

Interfacing and Operation

Control Basics

Power Requirements

The LC640.480.21-065 display requires two power supplies: +5 Vdc for the LCD logic
and +12 Vdc for the backlight. In Table 6 below, the backlight current and power are
referenced to maximum luminance, 25 °C ambient temperature.

Table 6. Input Pow er

Panel

Panel voltage (nominal = 5.0V) V
Absolute max. V
ICC(VCC=5.0V) I

Inverter

Inverter voltage (nominal = +12.0V) V
Absolute max. voltage V
Current (V

Backlight

Backlight heater voltage V
Backlight heater current I
Cell heater voltage V
Cell heater current I

CC

= 8.0V, max. luminance) I

INV

Symbol Min Typ Max Units

4.75 5.0 5.25 Vdc

-0.3 – 6.5 Vdc
– 470 640 mAdc

8.0 12.0 18.0 Vdc
– – 20.0 Vdc
– 1.6 1.8 Adc

8.0 12.0 18.0 Vdc
– 2.0 3.0 Adc

8.0 12.0 18.0 Vdc
– 1.0 1.5 Adc

V

CC
CC

CC

INV
INV

INV

LH

LH

LH

LH

CAUTION: Absolute maximum ratings are those values beyond which damage to

the device may occur.

LC640.480.21-065 Operations Manual (OM610-00)8